NEH2000BY

Energy harvesting PMIC
Rev. 4.0 — 16 August 2023

Product data sheet

1. General description
NEH2000BY is a high-performance energy harvesting solution for low-power applications. The
NEH2000BY harvests energy generated by a photo-voltaic (PV) cell. The energy charges arechargeable battery.
Nexperia’s advanced Maximum Power Point Tracking (MPPT) uses an embedded hill-climbing
algorithm to deliver the maximum power to the load. The MPPT is designed to be independent ofspecific characteristics of the harvesters, therefore any harvester that fits the specifications of thechip can be used. Moreover, the MPPT circuit can detect the maximum power point with an intervalof 0.7 second resulting in maximum efficiency in various environments where energy can rapidlychange over time.
The NEH2000BY is available in a Plastic 16 terminal Quad Flat package, 3 mm x 3 mm.

2. Features and target applications
Features and benefits

Applications

•

•
•
•
•
•
•
•

•
•
•
•
•

High-efficiency low-power 2x boosting
DC-to-DC converter
Harvesting power range from 35 µW to
2 mW
Advanced MPPT to maximize efficiency
Ultra fast MPPT interval of 0.7 second
Small BOM with no external inductor
requiredCompatible with various types ofrechargeable batteries

Wireless IoT devices
Smart remote controls
Electronic shelf labels
Wearable devices
Industrial and environmental monitoring
Consumer electronics
Beacons

3. Typical application
aaa-036315

NEH2000BY
VIN

+
C3

-

5.6nF

PV - Cell

Fig. 1.

Typical PV-Cell application

VBAT
VREF

DISABLE
NC

C1
2.2uF

C2
2.2uF

+

SYSRDYGND RESERVED

BatteryNEH2000BY

Nexperia

Energy harvesting PMIC

4. Pinning information
Package Diagram

2

VREF

3

GND

4

SYSRDY

VIN

GND

14

13

PAD

NEH2000BY
16-pinQFN 3 X 3 mm

VBAT

5

6

7

8

VBAT

DISABLE

15

GND

1

16

GND

NC

RESERVEDTop View

12

VBAT

11

VBAT

10

VBAT

9

GND

Not to scaleFig. 2.

QFN16 3 mm x 3 mm package

Table 1. Pinning information
Pin

SymbolDescription

1NC

not connected; can be floating or grounded

2

DISABLEDisable pin. Harvester is active when connected to GND. This pin can be used
to deactivate harvesting in case battery is full

3

VREF

decoupling for internal supply generation; no external load supported

4

GND

ground5

VBAT

output of the energy harvester and device supply

6

GND

ground7

GND

ground8

VBAT

connect to VBAT

9

GND

ground10

VBAT

connect to VBAT

11

VBAT

connect to VBAT

12

VBAT

output of the energy harvester and device supply

13

GND

ground14

VIN

DC input of energy harvester

15

SYSRDY

System Ready output; indicates (HIGH) when start-up of device is ready

16

RESERVED

reserved; should be left floating

PAD

GND

ground

NEH2000BY

Product data sheet

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NEH2000BY

Nexperia

Energy harvesting PMIC

5. Ordering information
Table 2. Ordering information
Type number
Package
NEH2000BY

Name

Description

Version

SOT8076-1

Plastic Quad Flat package, no leads; 16 terminals: 0.5 mm
pitch 3 mm x 3 mm x 0.75 mm body

1.0

6. Block Diagram
aaa-036316

NEH2000BY
VIN

14

VDD1V8

Converter

5, 8, 10,
11, 12MPPT

VBAT

Oscillator
VBAT

DISABLE

Fig. 3.

SYSRDYPOR

2

VDD1V83

References15

1

4, 6, 7,
9, 13, PAD

16

NC

GND

Reserved

VREF
SYSRDY

NEH2000BY block diagram

7. Limiting values
Table 3. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
SymbolParameter

VIN

input voltage [1]VBATbattery voltage

VDISABLE

Min

Max

Unit

-0.3

VBAT + 0.3

V

-0.3

5

V

-0.3

5

V

DISABLE input voltage

-0.3

5

V

IIN

input current

-

100

mA

Tj

junction temperature

-50

+125

°C

Tstg

storage temperature

-65

+150

°C

[1]

Conditions

To prevent damage to the device, do not apply VIN > 2 V in case no battery connected.

7.1. ESD ratings
Table 4. ESD ratings
SymbolParameter

Conditions

Value

Unit

VESD

HBM: ANSI/ESDA/JEDEC JS-001± 2000V

CDM: ANSI/ESDA/JEDEC JS-002± 1000Velectrostatic discharge voltage

NEH2000BY

Product data sheet

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NEH2000BY

Nexperia

Energy harvesting PMIC

8. Recommended operating conditions
Table 5. Recommended operating conditions
SymbolParameter
Conditions

Min

Typ

Max

Unit

VBAT

battery voltage

2.5

-

4.5

V

Tamb

ambient temperature

-40

-

+85

°C

9. Thermal characteristics
Table 6. Thermal characteristics
SymbolParameter

SOT8076-1

UnitRθ(j-a)junction-to-ambient thermal resistance

97

K/W

Rθ(j-top)junction-to-case (top) thermal resistance

88

K/W

Ψ(j-top)

junction-to-case (top) thermal characterization parameter

60

K/W

10. Characteristics
Table 7. Characteristics
VBAT = 3 V, VOC = 3 V. Typical values specified at Tamb = 25 °C, Min and Max values specified at Tamb = –40 °C to 85 °C.
Voltages are referenced to GND (ground = 0 V).
SymbolParameter

Conditions

Min

Typ

Max

Unit

to startup SYSRDY becomes high

-

2.5

2.7

V

[1]

1.9

-

-

V

[2]

-

1.65

-

V

-

625

1150

nA

1.6

1.8

2

V

time for SYSRDY to become
high after applying VBAT; -20 °C < Tamb< 85 °C

-

50

-

ms

Supplies and start-up
VBAT

battery voltage

after startup SYSRDY is highVIN

harvester input voltage

ISTBY

standby current

VREF

internally generated
supplytstartstart-up time[3]

Power converter
PIN(low)

input power range, low-end

efficiency = 70%

-

35

-

μW

PIN(high)

input power range, high-end efficiency = 70%

-

2

-

mW

tMPPT

MPPT interval

-

0.7

-

s

tMPPT_OPTMPPT optimization time

-

10

-

ms

fCONV(low)frequency at low-end power

Pin = 35 μW

-

50

-

kHz

fCONV(high)frequency at high-end power Pin = 2 mW

-

1.8

-

MHz

VIL

logic low level for
DISABLE

-

-

0.1 ×
VBAT

V

VIH

logic high level for
DISABLE

0.9 ×
VBAT

-

-

V

Control

[1]
[2]
[3]

Reduced performance to be expected for VBAT < 2.5 V.
To prevent battery charging directly from the PV-cell take care that VOC is lower than VBAT plus a diode voltage (~0.5 V).
Do not use/load VREF in the application.

NEH2000BY

Product data sheet

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NEH2000BY

Nexperia

Energy harvesting PMIC

10.1. Typical performance characteristics
VBAT = 3 V, VOC = 3 V, Tamb = 25 °C, unless otherwise specified.
aaa-036127

1000

aaa-036150

4
Voltage
(V)

ISTBY
(nA)
800

Tamb = 85 °C

VBAT

3

25 °C

SysRdy600-40 °C

VREF

2

400
1

200

0
2.5

3

3.5

4

VBAT (V)0

4.5

Tamb= 85 °C, 25 °C, -40 °C
Fig. 4.

aaa-036151

Efficiency(%)

Fig. 5.

85 °C
25 °C
-40 °C

40

40

20

20

0

10
102
Available power (mW)

Tamb= 85 °C, 25 °C, -40 °C
Fig. 6.

Product data sheet120
140
time (ms)Tamb =

10

102

103
104
Input current (µA)

Tamb= 85 °C, 25 °C, -40 °C

Efficiency as a function of available power

NEH2000BY

100

85 °C
25 °C
-40 °C60

180

aaa-036152

80

10-1

60

Start-up sequence; VREF, VBAT and SysRdy as afunction of time

Efficiency(%)

Tamb =

0
10-2

40

100

80

60

20

DISABLE = LOWStand-by current as a function of VBAT

100

0Fig. 7.

Efficiency as a function of input current

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NEH2000BY

Nexperia

Energy harvesting PMICVBAT = 3 V, VOC = 3 V, Tamb = 25 °C, unless otherwise specified.
aaa-036153

100
Efficiency(%)

Efficiency(%)

VBAT =

8060

aaa-036154

100

80
2.7 V

3.5 V
3.0 V

40

20

20

0
10-2

10-1

0

10
102
Available power (mW)1battery voltage = 2.7 V, 3.0 V, 3.5 V

aaa-036155

100
VOC = 3.3 V

60

Fig. 9.

aaa-036156

100

40

20

20

1

10
102
Available power (mW)

VOC = 2.5 V, 3.0 V, 3.3 V

Product data sheet

0

10

102

103
104
Input current (µA)

VOC = 2.5 V, 3.0 V, 3.3 V

Fig. 10. Efficiency as a function of available power

NEH2000BY

3.0 V
2.5 V

60

40

10-1

VOC = 3.3 V

80

2.5 V

0
10-2

103
104
Input current (µA)

Efficiency as a function of input current

Efficiency
(%)

3.0 V

80

102

10

battery voltage = 2.7 V, 3.0 V, 3.5 V

Efficiency as a function of available power

Efficiency
(%)

3.0 V
3.5 V

60

40

Fig. 8.

VBAT = 2.7 V

Fig. 11. Efficiency as a function of input current

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NEH2000BY

Nexperia

Energy harvesting PMIC

11. Application information
11.1. Typical application
A typical PV-cell application is shown in Fig. 12. Table 8 lists the Bill of Materials.
aaa-036315

NEH2000BY
VBAT

VIN

+
C3
5.6nF

-

C1
2.2uF

VREF
DISABLE+SYSRDYGND RESERVED

NC

PV - Cell

C2
2.2uF

Battery

Fig. 12. Typical PV-Cell application
Table 8. Bill of Materials
Reference
Description
designator

Type

Value

Quantity

U1

PMIC

NEH2000BY-

1

C1, C2

capacitor

X7R / 6.3 V

2.2 µF2

C3

capacitor

X7R / 6.3 V

5.6 nF1

11.2. Harvesting efficiency
The overall efficiency (Efftotal) of the NEH2000BY in combination with a PV-cell comprises twocomponents (see Fig. 13):••

Effconverter : The efficiency of the power converter in the NEH2000BY
Effmatch : The matching efficiency between the NEH2000BY and the PV-cell

Eff total = Eff converter × Eff match
PV-Cell+

NEH2000BY

+
VOC

V OUT

V IN

(1)

Battery+-

Eff match

Eff converter

aaa-036317

Fig. 13. Matching and converter efficiency

NEH2000BY

Product data sheet

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NEH2000BY

Nexperia

Energy harvesting PMIC

11.3. Power converter efficiency
In practice, a power converter has losses from input power (PIN) to output power (POUT). The ratioof the output power and input power, is typically referred to as the power-converter efficiency:

Eff converter =

POUT
PIN

× 100 %

(2)

For common inductive and capacitive power converters this efficiency is in the range of 80% to95%. Several characteristics can have an impact on this efficiency, such as: ratio of the output
voltage and input voltage; quality and size of the converter capacitors / inductors, fully integrated or
external components, etc. The NEH2000BY has a fully integrated power converter. In its targeted
power range the converter efficiency is about 82%.

11.4. Matching efficiency
In general, power transfer between components is optimized by matching the receiving input
impedance with the transmitting output impedance. In a harvesting system it is also important totransfer power from harvester to the power converter in the most efficient manner to minimize lossof harvested energy. How optimal power transfer between PV-cell and power converter is, can be
expressed by matching efficiency.
The matching efficiency is defined as

Eff match =P IN
× 100 %
Pavailable(3)

Where PIN is the actual power at the input of the power converter and Pavailable is the maximum
power that can be achieved at the input (which is at 100% matching).
From the graphs in Section 10.1, (Fig. 8 to Fig. 11), it can be seen that the matching efficiency(as part of the overall efficiency) has a dependency on the ratio of VOC and VBAT. Both relate
in a certain way to the power converter’s input. The VBAT relation can be understood from theperspective that the capacitive power converter has a given boost factor between input and output:

V IN =V BAT
Boosting factor(4)

Where the actual boosting factor of the NEH2000BY is about 1.8 (unloaded boosting is 2).
The open-circuit voltage (VOC) of a PV-cell relates to power converters input via the maximum
power-point tracking voltage (VMPPT). This is the voltage on the power converter’s input wheremost power is delivered by the PV-cell:

V MPPT = 0.7 ... 0.9 × VOC(5)The typical MPPT ratio (VMPPT/VOC) of a PV-cell is 0.8.

Combining equations (4) and (5), the following guideline for VOC applies:

V OC =V BAT

Boosting factor × MPPT ratio

V OC = 0.69 × V BAT(6)Thus, for optimal matching efficiency a PV-cell should be chosen with a VOC that is 0.69 × VBAT.

NEH2000BY

Product data sheet

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NEH2000BY

Nexperia

Energy harvesting PMIC

11.5. Guideline for PV-cell selection
In this section a guideline is given for the selection of a PV-cell in an NEH2000BY application.
Following this guideline will yield the best overall efficiency for the energy harvesting of theapplication. It is based on the optimum matching efficiency as described in the previous section.
Taking into account that the maximum-power point of a PV cell is about 0.8 × VOC, the following
guideline for the PV-cell applies:

V OC = 0.5 ... 0.8 × VBAT

(7)

11.6. Enhanced low input power operation
In case operation at very low input power levels is desired, the NEH2000BY can be configured
for operation starting at 10 μW input power. In this case, the power range shifts down by about afactor of 2. Please contact Nexperia for the appropriate configuration.

11.7. Full battery protection
In general, a battery should not be over-charged. Continue charging in that case can damage
the battery. An energy harvester, like the NEH2000BY should therefore stop harvesting once thebattery is fully charged. This can be implemented by adding an over-voltage protection device(OVP) to the harvester (see Fig. 14).
Detecting whether a battery is fully charged or not can be done by observing the battery voltage.
Each battery type has it own maximum allowed voltage. An OVP device can monitor the battery
voltage VBAT. Once the maximum allowed battery voltage is detected the OVP device will assert its
output and by that disable the harvester. Once the VBAT level drops below the release voltage of
the OVP device, harvesting commences again.
OVP devices are available in many different types. The OVP device should have an over-voltage
detection level that corresponds to the maximum allowed battery voltage. The output logic of the
OVP should be chosen such that the output is high when the maximum battery voltage is at or
above the allowed level.
aaa-036318

U1

NEH2000BY

PV - Cell

+
-

VIN

C3
5.6nF

Battery

VBAT

C2
2.2uF

VREF
DISABLENC+

SYSRDYGND RESERVED

C1
2.2uF

U2
OVP
VDD

OUT
GND

Fig. 14. Application with maximum battery-voltage protection

NEH2000BY

Product data sheet

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NEH2000BY

Nexperia

Energy harvesting PMIC

12. Package outline
HWQFN16: plastic thermal enhanced very very thin Quad Flat packages;
no leads; 16 terminals; 0.5 mm pitch; 3.0 × 3.0 × 0.75 mm body

e
(12×)

b
(16×)
5

SOT8076-1

C A B
C

v
w
8

L (16×)
4

9

C A B

z

k

E2

1

detail X

12
A
16

13

A3

D2
X

A1

y1 C
C

y C
(16×)

seating planeDterminal 1
index area

B

A

E
u C

0

5 mm
scale

Dimensions (mm are the original dimensions)
Unit(1)
mm

A

A1

A3

b

D

D2

E

E2

e

k

L

u

v

w

y

y1

z

max 0.80 0.05
0.30
1.75
1.75
0.40
0.20
3.00
3.00
0.50 0.30
nom 0.75 0.02
0.24
1.70
1.70
0.35 0.15 0.10 0.05 0.08 0.10 0.10
REF
BSC
BSC
BSC REF
0
0.18
1.65
1.65
0.30
min 0.70
sot8076-1_po

Outlineversion
SOT8076-1

References
IEC

JEDEC

JEITA

MO-220(WEED-4)

Europeanprojection

Issue date23-03-20

Fig. 15. Package outline

NEH2000BY

Product data sheet

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NEH2000BY

Nexperia

Energy harvesting PMIC

13. Soldering
Footprint information for reflow soldering of HWQFN16 package

SOT8076-1

3.8
2.9
1.8
1.7

0.5
(12×)
0.25

1.7 1.8 2.9 3.8

0.46 (4×)

0.65
0.8
0.7
(16×) (16×) (16×)

0.2
(16×)

0.46
(4×)

0.25
(16×)

0.25

0.35
(16×)

recommended stencil thickness: 0.1 mm

occupied area

solder resist

solder landsolder paste

Dimensions in mm
Issue date23-03-21

sot8076-1_fr

Fig. 16. Soldering footprint

NEH2000BY

Product data sheet

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NEH2000BY

Nexperia

Energy harvesting PMIC

14. Revision history
Table 9. Revision history
Document ID

Release date

Data sheet status

Change notice Supersedes

NEH2000BY v.4

20230816

Product data sheet-

NEH2000BY v.3.1

Modifications:

Table 6 and Table 7 updated.

NEH2000BY v.3.1

20230403-

NEH2000BY v.3

Modifications:

Footnote added in Table 3. Table 7 format adjusted.

NEH2000BY v.3

20230328

Modifications:

Pin names updated. Section 11.4, Section 11.5 and Section 12 revised.

NEH2000BY v.2

20230302

Modifications:

Updated to latest Nexperia technical document format

NEH2000BY v.1
note: previously named
NH2D0245 Revison 1.0

20221101

NEH2000BY

Product data sheet

Product data sheet
Product data sheet
Preliminary data sheet
Preliminary data sheet-

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NEH2000BY v.2
NEH2000BY v.1-© Nexperia B.V. 2023. All rights reserved

12 / 14

NEH2000BY

Nexperia

Energy harvesting PMIC

15. Legal information

injury, death or severe property or environmental damage. Nexperia and its
suppliers accept no liability for inclusion and/or use of Nexperia products insuch equipment or applications and therefore such inclusion and/or use is at
the customer’s own risk.

Data sheet status

Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of thisdocument, and as such is not complete, exhaustive or legally binding.

Document status[1][2]

Product
status [3]Definition

Objective [short]data sheet

Development

This document contains data fromthe objective specification for
product development.

Preliminary [short]data sheet

Qualification

This document contains data fromthe preliminary specification.

Product [short]data sheet

Production

This document contains the productspecification.

[1]
[2]
[3]

Please consult the most recently issued document before initiating orcompleting a design.
The term 'short data sheet' is explained in section "Definitions".
The product status of device(s) described in this document may havechanged since this document was published and may differ in case ofmultiple devices. The latest product status information is available on
the internet at https://www.nexperia.com.

Definitions
Draft — The document is a draft version only. The content is still underinternal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any representations or
warranties as to the accuracy or completeness of information included hereinand shall have no liability for the consequences of use of such information.
Short data sheet — A short data sheet is an extract from a full data sheetwith the same product type number(s) and title. A short data sheet isintended for quick reference only and should not be relied upon to containdetailed and full information. For detailed and full information see the relevant
full data sheet, which is available on request via the local Nexperia sales
office. In case of any inconsistency or conflict with the short data sheet, thefull data sheet shall prevail.
Product specification — The information and data provided in a Productdata sheet shall define the specification of the product as agreed between
Nexperia and its customer, unless Nexperia and customer have explicitly
agreed otherwise in writing. In no event however, shall an agreement bevalid in which the Nexperia product is deemed to offer functions and qualities
beyond those described in the Product data sheet.

Disclaimers
Limited warranty and liability — Information in this document is believed
to be accurate and reliable. However, Nexperia does not give any
representations or warranties, expressed or implied, as to the accuracy
or completeness of such information and shall have no liability for theconsequences of use of such information. Nexperia takes no responsibility
for the content in this document if provided by an information source outsideof Nexperia.
In no event shall Nexperia be liable for any indirect, incidental, punitive,
special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removalor replacement of any products or rework charges) whether or not suchdamages are based on tort (including negligence), warranty, breach ofcontract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards customer
for the products described herein shall be limited in accordance with theTerms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make changes
to information published in this document, including without limitation
specifications and product descriptions, at any time and without notice. This
document supersedes and replaces all information supplied prior to the
publication hereof.
Suitability for use — Nexperia products are not designed, authorized or
warranted to be suitable for use in life support, life-critical or safety-criticalsystems or equipment, nor in applications where failure or malfunctionof an Nexperia product can reasonably be expected to result in personal

NEH2000BY

Product data sheet

Applications — Applications that are described herein for any of theseproducts are for illustrative purposes only. Nexperia makes no representation
or warranty that such applications will be suitable for the specified use
without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using Nexperia products, and Nexperia accepts no liability forany assistance with applications or customer product design. It is customer’ssole responsibility to determine whether the Nexperia product is suitableand fit for the customer’s applications and products planned, as well as
for the planned application and use of customer’s third party customer(s).
Customers should provide appropriate design and operating safeguards tominimize the risks associated with their applications and products.
Nexperia does not accept any liability related to any default, damage, costs
or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party
customer(s). Customer is responsible for doing all necessary testing for thecustomer’s applications and products using Nexperia products in order toavoid a default of the applications and the products or of the application or
use by customer’s third party customer(s). Nexperia does not accept any
liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above thosegiven in the Recommended operating conditions section (if present) or theCharacteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Nexperia products are
sold subject to the general terms and conditions of commercial sale, as
published at http://www.nexperia.com/profile/terms, unless otherwise agreed
in a valid written individual agreement. In case an individual agreement isconcluded only the terms and conditions of the respective agreement shallapply. Nexperia hereby expressly objects to applying the customer’s generalterms and conditions with regard to the purchase of Nexperia products bycustomer.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
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In the event that customer uses the product for design-in and use inautomotive applications to automotive specifications and standards,
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Rev. 4.0 — 16 August 2023

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NEH2000BY

Nexperia

Energy harvesting PMIC

Contents
1. General description...................................................... 1
2. Features and target applications................................ 1
3. Typical application........................................................1
4. Pinning information......................................................2
5. Ordering information....................................................3
6. Block Diagram.............................................................. 3
7. Limiting values............................................................. 3
7.1. ESD ratings................................................................. 3
8. Recommended operating conditions..........................4
9. Thermal characteristics............................................... 4
10. Characteristics............................................................ 4
10.1. Typical performance characteristics...........................5
11. Application information..............................................7
11.1. Typical application......................................................7
11.2. Harvesting efficiency.................................................. 7
11.3. Power converter efficiency.........................................811.4. Matching efficiency.................................................... 8
11.5. Guideline for PV-cell selection................................... 9
11.6. Enhanced low input power operation.........................911.7. Full battery protection................................................ 9
12. Package outline........................................................ 10
13. Soldering................................................................... 11
14. Revision history........................................................12
15. Legal information......................................................13© Nexperia B.V. 2023. All rights reserved

For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release: 16 August 2023

NEH2000BY

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 4.0 — 16 August 2023

© Nexperia B.V. 2023. All rights reserved

14 / 14