Output Current (A)

40

45

50

55

60

65

70

75

80

85

90

95

100

100n

1P

10P

100P

1m

10m

100m

1

D002

VIN = 1.8V

VIN = 2.5V

VIN = 3.0V

VIN = 3.6V

VIN = 4.2V

VIN = 5.0V

VIN = 6.5V

CI

4.7 µF

VIN

EN

VOS

GND

VSET

SW

VIN

CO

10µF

L

2.2 µH

VOUT

MODE

STOP

MODE

/STOP

ENABLE

RSET

RUN

TPS62841DLC

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS62840

SLVSEC6D – JUNE 2019 – REVISED MARCH 2020

TPS62840 1.8-V to 6.5-V, 750-mA, 60-nA IQ Step-Down Converter

1

1 Features

1

•

60-nA operating quiescent current

•

100% duty-cycle mode with 120-nA IQ

•

Input voltage range VIN from 1.8 V to 6.5 V

•

Output current up to 750 mA

•

RF friendly DCS-Control™

•

80% efficiency at 1 µA IOUT (3.6 VIN to 1.8 VOUT)

•

16 selectable output voltages via VSET pin

•

Auto transition PFM/PWM or forced-PWM mode

•

Selectable forced PWM and STOP modes

•

Output discharge function

•

25-nA shutdown current

•

SON-8, WCSP-6 and thermally enhanced

HVSSOP-8 packages

2 Applications

•

Smart meters, smart thermostats

•

Asset tracking devices

•

Wearable electronics

•

Medical sensor patches and patient monitors

•

Industrial IoT (smart sensors) / NB-IoT

•

Test and measurement

•

ATEX / intrinsic safety

3 Description

The

TPS62840

is

a

high-efficiency

step-down

converter with ultra-low operating quiescent current of

typically 60 nA. The device contains special circuitry

to achieve just 120 nA IQ in 100% mode to further

extend battery life near the end of discharge.

The device uses DCS-Control to cleanly power radios

and operates with a typical switching frequency of 1.8

MHz. In Power-Save Mode, the device extends the

light load efficiency down to a load current range of 1

μA and below.

16 predefined output voltages can be selected by

connecting a resistor to pin VSET, making the device

flexible for various applications with a minimum

amount of external components.

The STOP pin of the device immediately eliminates

any switching noise in order to take a noise-free

measurement in test and measurement systems.

The TPS62840 provides an output current of up to

750 mA. With an input voltage of 1.8 V to 6.5 V, the

device supports multiple power sources such as 2S

to 4S Alkaline, 1S to 2S Li-MnO2, or 1S Li-Ion/Li-

SOCl2.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS6284x

8 pin DLC (SON)

1.5 mm x 2 mm

6 pin YBG (WCSP)

0.97 mm x 1.47 mm

8 pin DGR

(HVSSOP)

3 mm x 5 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Typical Application

Efficiency versus Load Current (VOUT = 1.8 V)