Discover ST’s portfolio forsignal conditioning,interface, and power
management in wearables

Wearable devices attributes
Always on

Low power

Devices worn for an
extended time withsignificantly enhanceduser experience

Compact

Environment awareIntelligent

Connected
2Market and applications
Healthcare andmedicalFitness and wellness
Monitor activity and emotions•••

Monitor vital signs
Activity monitors, foot pods andpedometers, entertain sleep
sensors, heart rate monitors
Emotional measurement
Smart clothing, smart watches,heads-up displays

Infotainment••

Blood pressure monitors, ECG
monitors, continuous glucose
monitoring
Insulin pumps, drug delivery
products

Industrial

Entertain and enhance lifestyle••Headsets
Smart glasses, smart watches

Hand-worn terminals, heads-up
displays, smart clothing, wearable
detection devices.

33

ST signal conditioning and interface portfolio forwearable devices
Operational amplifiers
Large portfolio of highly power efficient op amp in tiny packages

Smart reset
Customizable products providing safe and convenient reset

Battery gas gauges
Low-power gas gauge providing very accurate battery life indicator

Current sensors
High accuracy current measurement for contactless battery chargers

Audio amplifiersHigh-efficiency Class D and G amplifiers for headsets and speakers

DC-DC Buck regulators
Very high efficiency in any output load conditions, high integration,
flexibility​

New ST LDOs for smartphones
The one-stop-shop supplier4

Wearable devices
Analog and mixed signal products partitioning
Digital sensors
OperationalAmplifiers

User interface
MCU

Analogfront-end

Connectivity

Analogswitches

Analog sensors

Smart resetPowermanagement

Currentsensors

Battery gasgauges

5Solutions for analog front-end

Analog front-end
Analog transducers, getting the best from your sensor
Analog sensors need signal transducers to deliver the information to the MCU• Accurate and stable to guarantee the maximum precision of the information• Low power to guarantee a longer user experience• Small to be integrated in the most stylish and thin designs

ST offers a dedicatedset of op amps to deliver
the best match ofcurrent consumption
and precision, for a wide
range of applications.

TSU10xInput offset
voltage[µV]

Input offset
voltage drift[µV]

Supplycurrent[µA]GBP[kHz]Supplyvoltage [V]10050.68

1.5 - 5.550109120

1.5 - 5.5

10.01

28400

1.8 - 5.5

Very low power

TSV71xLow power precision

TSZ12xHigh precision zero drift

7More info on Operational AmplifiersAnalog Front-End
Signal transducers application: electromyography

TSZ12x

TSV71xA low input offset voltage with zero drift amplifier is mandatory.
Otherwise, the electrodes information would be less accurate or lost.
TSZ12x family is the perfect match offering:• VIO= 1μV• ΔVIO/ΔT = 0.010μVOnce the signal dynamic has been restored precision and micro power
consumption amplifiers are needed before the signal is fed to the MCU
TSV71x is the perfect match offering:• VIO= 50μV
• ICC = 9μA
8User Interface
Audio amplifiers
3W CLASS D MONO SPEAKER AMPLIFIER

ST offers highly-efficientdevices that can deliver
high-quality audio intosmall, low power solutions

CLASS G HEADPHONE AMPLIFIER
TS4621ML | TS4621E (μ-less)
•••
•
••

Power supply range 2.3 V - 4.8 V
Low stand by current 0.6 μA
Vout = 0.8 Vrms into 16 Ω, at 1%
THD+N, VCC = 3.6 V
SNR = 100 dB @ 1 kHz
Reduced external BOM
Flip-chip package

TS4962M••••••

Power supply range 2.4 V - 5.5 V
Low stand by current <1 μA
Pout = 0.8 W into 8 Ω, at 10%
THD+N, VCC = 3 V
SNR = 85 dB @ 1 kHz
Reduced external BOM
Small flip-chip package

Low power
High quality
Small size

Headphone and Low Power Amplifiers- online

9Solutions for power management

Smart reset
SMART RESET ICs
Extend the functionality of existing buttons by enabling‘hidden’ features (hard reset, factory reset etc) that canbe activated by users with long press on 1 or 2 buttons
simultaneously.

KEY APPLICATIONS-Smartphones
Tablets
Handheld devices
Wearable
IoT
Non-removable battery
powered devices

KEY FEATURES--

1 or 2 push buttons
Customizable Reset setup delay
Device ship mode
Tiny package# of resetbuttons

Reset set-up
delay

Reset pulse
durationextra featurePackage

STM65191

1.5s to 10s

Fixed or pushbutton controlled

Customer testmode

DFN-6

STM65202

7.5s to 12.5sFixed or pushbutton controlled

1 push-pull
output

DFN-8

STM6524

24s to 10s

Fixed or pushbutton controlled

Customer test
mode

DFN-6

STM6600

1Selectable via
ext. capacitor

360ms

1 power button

DFN-12

STM6620210s

push button
controlled

Ship mode

QFN-1011

STUSB4500L
USB-C charging - SINKSTUSB4500L – USB micro-B replacement – 15 W

Auto-run / plug & play / optional MCU support

SOURCE power budget identification

Wearable, portable consumer, gaming, healthcare, POS

Automatic error recovery and restart on faultDead battery support

Collateral

Evaluation boards &ref designs

STSW-STUSB002 - GUI
STSW-STUSB007 - Software
library

Package

QFN-24 EP
4x4 mm²

CSP-252.6x2.6 mm²

open source ALTIUM library
EVAL-SCS002V1

Find out more

12

Current sensing
Offsetvoltage (mV)Common mode
operating range [V]Supply voltage
range [V]Supply current[μA]

Gain [V/V]

Bidirection
featurePackage

TSC101

1.5

2.8 - 30.0

4.0 - 24.0

165

20. 50, 100
fixed internally

noSOT23-5L

TSC1030.5

2.9 - 70.0
-2.1 - 65.0

2.7 - 5.5

200

20, 50, 100 pin
selectablenoTSSOP-8L,SO-8

TSC21x0.035-0.3 - +26

2.7 - 26100

200 500 1000
50 100 75

yes

SC70-6,QFN-10L

Power management in wearable devices:
Wired or wireless battery chargers
Precision current sources fromsensors
Photovoltaic systems

ST current sensing ICs portfolio cover mostapplication needs:••••

Independent supply and common mode voltages
Wide supply voltage range
Selectable gains
Low power solutions

More info Current Sensing - online13

Current sensing application:
wireless battery charging• When swimming water pressure can reach up to 5 atm• Wearable technology needs to be sealed. All the electrical connections
with the external have to be removed.
• Wireless battery charging is mandatory
High side current sensing through the transmitter coil todynamically regulate the charger power output

TSC103

Power14

Intelligent battery monitoring
Battery gasgauges

ST offers an integrated solution combining current integrationand voltage variation over the time thus providing the mostaccurate battery status measurement

STC3115 - Gas gauge IC with alarm output for wearabledevicesAccuracy••

Coulomb counter mode, voltage mode and mixed mode
operations
0.25 % accuracy battery voltage monitoring

Robustness••

Analog and temperature compensation
Internal temperature sensor

Flexibility••

Low battery level alarm output with programmable thresholds
Custom battery OCV curve

Low power

2 µA in standby, 45 µA in operating

Small size

Flip chip, 2.01 x 1.37 x 0.6 mm, 10 bumps, 0.4 mm pitch
Read more about battery fuel gauge - online

15

New ST LDOs for smartphones
One-stop shop supplierLD56020200 mA, low input voltageHigh PSRR, Low noise

LD56050
DFN5 1.2x1.2

500 mA Ultra Low Dropout
Separate Bias RailLow output voltages

Sensors

LD39130S
Front Camera

300 mA Ultra Low IQ
Green Mode

Rear Camera

LD57100

LD56100
DFN8 1.2x1.6

1 A Ultra Low Dropout
Fast transient
Ultra Low NoiseSD Memory

Wi-Fi / Bluetooth

1 A Ultra, Low IQ
Low Dropout with bias

LD59030300 mA Ultra Low Dropout

Noise sensitive loads
e.g. Audio HiFi

LDLN025250 mA Ultra Low Noise
Very High PSRR
16

ST1PS01

Part Numbers

Output Voltages

ST1PS01AJR

From 1.9V to 2.8V

ST1PS01BJR

From 1.1V to 1.7V

ST1PS01CJR

From 1V to 1.5V

ST1PS01DJR

From 1.8V to 2.8V

ST1PS01EJR

From 1.8V to 3.3V

ST1PS01FJR

From 1.05V to 1.55V

ST1PS01GJR

From 0.73V to 1V

ST1PS01HJR

From 0.625V to 1.05V

Part Numbers

OutputVoltages

OutputDischarge

From 1.4V
to 1.75V,50mV
step

Yes

From 1.8V
to 2.5V, 100mV
stepYes

From 2.6V
to 3.3V,100mV
stepYes

From 1V
to 1.35V, 50mV
stepYes

DC-DC buckregulators

Package

FlipChipVery high efficiency in any output load conditions✓ 95% typical efficiency at 1mA load
✓ 92% typical efficiency at 400mA load
High integration for the minimum board size
and number of external components✓ Synchronous rectification✓ Internal Loop Compensation✓ Tiny external components✓ Embedded Soft start Circuit

ST1PS02
ST1PS02AQTR
ST1PS02A1QTR
ST1PS02BQTR
ST1PS02B1QTR
ST1PS02CQTR
ST1PS02C1QTR

ST1PS03

ST1PS02DQTR
ST1PS02D1QTRPart Numbers
ST1PS03AQTR
ST1PS03A1QTR

Package

NoNo

Flexibility✓ Extended input voltage range, minimum Vin=1.8V✓ Dynamic output voltage selection

TQFN12L

NoNo

OutputVoltages

OutputDischarge

From 1.6V to3.3V

YesNoPackage
TQFN12L

Read more about buck regulators

KEY APPLICATIONS••••

Wearable application
Personal Tracking monitors
Industrial sensors
Bluetooth Low Energy
17

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