AIC1765B
55V, 200mA Low Dropout Voltage
Linear Regulator

 FEATURES DESCRIPTION

2.2μA Ground Current at no Load
 ±1% Output Accuracy
 200mA Output Current
 10nA Disable Current
 Wide Operating Input Voltage Range: 2V to55V
 Dropout Voltage: 0.66V at 100mA (VOUT=5V)
 Support Fixed Output Voltage 1.8V, 3.3V, 5V,9V, 12V
 Adjustable Output Voltage Available by SpecificApplication
 Stable with Ceramic or Tantalum Capacitor
 Current Limit Protection
 Over-Temperature Protection
 SOT23-5 and SOP-8 Exposed Pad Packages
Available


The AIC1765B series are a group of low-dropout(LDO) voltage regulators offering the benefits ofwide input voltage range, low dropout voltage, lowpower consumption, and miniaturized packaging.
Quiescent current of only 2.2µA makes thesedevices ideal for powering the battery-powered,always-on systems that require very little idlestate power dissipation to a longer service life.
There is a shutdown mode by pulling the EN pinlow. The shutdown current in this mode goes
down to only 10nA (typical).
The AIC1765B series of linear regulators arestable with the ceramic output capacitor over its
wide input range from 2V to 55V and the entire
range of output load current (0mA to 200mA).

 APPLICATIONS
Portable, Battery Powered Equipment
 Low Power Microcontrollers
 Laptop, Palmtops and PDAs
 Wireless Communication Equipment
 Audio/Video Equipment
 Car Navigation Systems
 Industrial Controls
 Weighting Scales Meters
 Home Automation
Analog Integrations Corporation

Si-Soft Research Center

DS-1765BG-02

20220913

st1A1, 1 Li-Hsin 1 Rd., Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500

FAX: 886-3-5772510

www.analog.com.tw

1AIC1765B

 TYPICAL APPLICATION CIRCUIT
U112VinCin
1μF

OFF ONEN

AIC1765B-33

VIN

VOUTENGND SNS

3.3Vout

Cout
1μF

Fig. 1 Typical Application Circuit of Fixed VOUT LDO with Enable and Sense Functions
U1Vin

VIN

AIC1765B-XX
VOUT

Vout
R1Cin
1μF

OFF ONENENNC
Cout
1μF

GND SNS
R2

Fig. 2 Adjustable Output Voltage LDO Application Circuit by AIC1765B

2AIC1765B

 ORDERING INFORMATION
AIC1765B-XXXXXXXXPIN CONFIGURATIONPACKING TYPETR: TAPE & REEL
TB: TUBE(For S8E Package)
BG: BAG(For U5 Package)
PACKAGE TYPE
U5: SOT23-5
S8E: SOP-8 Exposed Pad
G: GREEN PACKAGE
OUTPUT VOLTAGE
18: 1.8V
33: 3.3V
50: 5.0V
90: 9.0V
A1: 12.0V(Special Request: Any Voltage
between 1.8V and 12V under
specific business agreement)

Example: AIC1765B-33GU5TR
 3.3V Version, in Green SOT23-5
Package and Tape & Reel Packing
TypeSOT23-5(U5)TOP VIEW

5

1. VIN
2. GND
3. EN
4. SNS
5. VOUT1423SOP-8 Exposed Pad
TOP VIEW1: VOUT
2. SNS
3. NC
4. GND
5. EN
6. NC
7. NC
8. VIN
9. GND

123

ExposedPad948765

Note: The exposed pad should leave floating or tie to GND.

 ABSOLUTE MAXIMUM RATINGS
VIN Pin and EN Pin to GND Pin Voltage ............................................................................ -0.3V to 60V
VOUT Pin to GND Pin Voltage .......................................................................................... -0.3V to 14V
SNS Pin to GND Pin Voltage
AIC1765B-A1, AIC1765B-90 ..................................................................... -0.3V to 14V
AIC1765B-18, AIC1765B-33, AIC1765B-50 ............................................ -0.3V to 6.0V
VOUT Pin to VIN Pin Voltage ............................................................................................. -60V to 0.3V
Storage Temperature Range ............................................................................................. -60ºC~150ºC
Lead Temperature (Soldering, 10 sec) ......................................................................................... 260ºC
Junction Temperature ................................................................................................................... 150ºC
Operating Ambient Temperature Range TA ......................................................................... -40ºC~85ºC
Thermal Resistance Junction to Case, RθJC

SOT23-5 .................................................... 115C/W
SOP-8 Exposed Pad* .................................. 15C/W

Thermal Resistance Junction to Ambient, RθJA

SOT23-5 .................................................... 250C/W
SOP-8 Exposed Pad* .................................. 60C/W(Assume no Ambient Airflow, no Heatsink)
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
*The package is placed on a two layers PCB with 2 ounces copper and 2 square inch, connected by 8 vias.

3

AIC1765B

 ELECTRICAL CHARACTERISTICS(VIN=15V, VEN=5V, TA=25°C, unless otherwise specified) (Note 1)
PARAMETERTEST CONDITIONS

Supply Voltage
DC Output Voltage Accuracy

SYMBOLMIN.

VIN
ILOAD=0.1mA

TYP.

MAX.

UNIT

255

V

-1

1%

ILOAD=100mA, VOUT≥5V

VDROP

0.66

ILOAD=100mA, VOUT=3.3V

VDROP_3.3V

0.75

ILOAD=100mA, VOUT=1.8V

VDROP_1.8V

1

ILOAD=0mA, VOUT≤5V

IQ

2.2

ILOAD=0mA, 5V<VOUT≤12V

IQH

4.2

Shutdown GND Current

VEN=0V, VOUT=0V

ISD

0.01

SNS Input Current

SNS=VOUT, VOUT≤5V

ISNS

0.9

EN Rising

VIHEN Falling

VIL

EN Input Current

VEN=36V

IEN

10Line Regulation

ILOAD=1mA, 5V≤VIN≤36V

∆LINE

0.3%

Load Regulation

1mA≤ILOAD≤200mA

∆LOAD

0.1%

Output Current Limit

VOUT=0V

300mA

PSRR

70dB

Dropout Voltage

Ground Current

Enable Threshold Voltage

Power Supply Rejection Ratio

VOUT=5V, ILOAD=1mA,
VIN=12V, f=100Hz

ILIM

V

µA
0.5µA

2.00.6

201µA

100VnA

Thermal Shutdown Temperature

ILOAD=10mA

TSD

160℃

Thermal Shutdown Hysteresis

ILOAD=10mA

TSD

15℃

Note 1. Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).

4

AIC1765B

 TYPICAL PERFORMANCE CHARACTERISTICS

Fig. 3 Output Voltage vs. Temperature

Fig. 4 Output Voltage vs. Input Voltage

Fig. 5 Output Voltage vs. Loading Current

Fig. 6 Dropout Voltage vs. Temperature

Fig. 7 Ground Current vs. Temperature

Fig. 8 Ground Current vs. Loading Current

5

AIC1765B

 TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

Fig. 9 Shutdown Ground Current vs. Temperature

Fig. 10 SNS Input Current vs. Temperature

Fig. 11 Current Limit vs. Input Voltage

Fig. 12 Current Limit Response

Fig. 13 Load Transient Response

Fig. 14 Line Transient Response6

AIC1765B

 TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

Fig. 15 Line Transient Response

Fig. 16 VOUT Turn on by EN

Fig. 17 VOUT Turn on by VIN Quick Power Up

7

AIC1765B

 BLOCK DIAGRAM

Functional Block Diagram of AIC1765B

 PIN DESCRIPTIONVIN
GND ENSNS VOUT NC-Input of Supply Voltage.
Ground.
Enable Control Input.
Sense of Output Voltage.
Output of the Regulator.
No Internal Connection.

8

AIC1765B

 APPLICATION INFORMATIONINPUT-OUTPUT CAPACITOR REQUIREMENTS
The external input and output capacitors of AIC1765B
series must be properly selected for stability andperformance. Use a 1μF or larger input capacitor andplace it close to the IC's VIN and GND pins. Anyoutput capacitor meeting the minimum 1mΩ ESR(EquivalentSeries

Resistance)

andeffective

capacitance between 1μF and 22μF requirement mayorder to keep a good temperature coefficient ofoutput voltage, the values of R1 and R2 should beselected carefully to ignore the temperature effect ofinput current at the SNS pin. A current greater than
50μA in the resistor divider is recommended to meet
the above requirement. The adjustable output voltage
can be calculated according to the following equation:
VOUT be used. Place the output capacitor close to the IC's

R1  R 2
 VSNS
R2

VOUT and GND pins. Increasing capacitance andwhere VSNS is determined by the output voltage

decreasing ESR can improve the circuit's PSRR andselections in the ordering information of AIC1765B.

line transient response.

The maximum adjustable output voltage is 12V.
Generally, to maximize the available adjustable

CURRENT LIMITThe AIC1765B series contain the current limiter ofoutput power transistor, which monitors and controls
the transistor, limiting the output current to 300mA(typical). The output can be shorted to groundindefinitely without damaging the part.

output voltage range, AIC1765B-18 is recommended(VSNS is 1.8V in above equation now)
The minimum recommended 50μA in the resistor
divider makes the application no longer a 2.2μA low
quiescent LDO.
OTP (OVER TEMPERATURE PROTECTION)DROPOUT VOLTAGE
The AIC1765B series use a PMOS pass transistor toachieve low dropout. When (VIN – VOUT) is less thanthe dropout voltage (VDROP), the PMOS pass device isin the linear region of operation and the input-tooutput resistance is the RDS(ON) of the PMOS passelement. VDROP scales approximately with the output

The

overtemperature

protection

functionofAIC1765B series will turn off the P-MOSFET whenthe junction temperature exceeds 160°C (typ.). Oncethejunction

temperaturecools

downbyapproximately 15°C, the regulator will automaticallyresume operation.

current because the PMOS device behaves as aTHERMAL APPLICATION

resistor in dropout condition.

For continuous operation, do not exceed the absolute

As any linear regulator, PSRR and transient response

maximum junction temperature. The maximum power

are degraded as (VIN – VOUT) approaches dropout

dissipation depends on the thermal resistance of thecondition.

IC package, PCB layout, rate of surrounding airflow,

ADJUSTABLE OUTPUT VOLTAGE APPLICATIONThe AIC1765B with SNS pin also can work as anadjustable output voltage LDO. Figure 2 gives theconnections

fortheadjustableoutputvoltage

application. The resistor divider from VOUT to SNSsets the output voltage when in regulation.

anddifference

betweenjunction

andambient

temperature. The maximum power dissipation can becalculated as below:
PD(MAX) = (TJ(MAX)−TA) / (RJA)
Where TJ(MAX) is the maximum allowable junction
temperature, and TA is the ambient temperature
suitable in application.

The voltage on the SNS pin sets the output voltagePower dissipation (PD) is equal to the product of theand is determined by the values of R1 and R2. Inoutput current and the voltage drop across the output

9AIC1765B
pass element, as shown in the equation below:
PD = (VIN – VOUT) × IOUT.
LAYOUT CONSIDERATION
By placing input and output capacitors on the sameside of the PCB as the LDO, and placing them as
close as is practical to the package can achieve thebest performance. The ground connections for input
and output capacitors must be back to the AIC1765B
ground pin using as wide and as short of a copper
trace as is practical.
Connections using long trace lengths, narrow trace
widths, and/or connections through via must beavoided.

Theseaddparasitic

resistancethatresultsininductances

worseandperformance

especially during transient conditions.

10AIC1765B

 PHYSICAL DIMENSIONS SOT23-5

AA

E

E1

Dee1

SEE VIEW B

WITH PLATING

cA

A2b

SECTION A-A

0.25

A1

BASE METALGAUGE PLANESEATING PLANE

L1

θ

L
VIEW B

Note : 1. Refer to JEDEC MO-178AA.
2. Dimension "D" does not include mold flash, protrusions
or gate burrs. Mold flash, protrusion or gate burrs shall not
exceed 10 mil per side.
3. Dimension "E1" does not include inter-lead flash or protrusions.
4. Controlling dimension is millimeter, converted inch
dimensions are not necessarily exact.

SOT23-5

SY
M
BO
L

MIN.

MAX.

A

0.95

1.45

A1

0.00

0.15

A2

0.90

1.30

b0.30

0.50

c0.08

0.22

D

2.80

3.00

E

2.60

3.00

E1

1.50

1.70

MILLIMETERSe0.95 BSC

e1

1.90 BSC

L0.30

θ

0.60
0.60 REF

L10°

8°

11AIC1765B
 SOP-8 Exposed PadDASEE VIEW BAeAh X 45°E1H

EXPOSED THERMAL PAD(Heat Sink)(BOTTOM CENTER OF PACKAGE)

E

D1

WITH PLATING

0.25CA1B

GAUGE PLANESEATING PLANELVIEW B

BASE METALSECTION A-A

Note : 1. Refer to JEDEC MS-012E.
2. Dimension "D" does not include mold flash, protrusions
or gate burrs. Mold flash, protrusion or gate burrs shall not
exceed 6 mil per side .
3. Dimension "E" does not include inter-lead flash or protrusions.
4. Controlling dimension is millimeter, converted inchdimensions are not necessarily exact.

SOP-8 Exposed PadSYM
BOLMIN.

MAX.

A

1.35

1.75

MILLIMETERS

A1

0.00

0.15

B

0.31

0.51

C

0.17

0.25

D

4.80

5.00

D1

1.50

3.50

E

3.80

4.00

E1

1.0e

2.55
1.27 BSC

H

5.80

h0.25

0.50

L

0.40

1.27

θ

0°

8°

6.20

Note:
Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other thancircuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We
reserve the right to change the circuitry and specifications without notice.
Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems aredevices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, whenproperly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to theuser.

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