0

10

20

30

40

50

60

70

80

90

100

V

I

- Input

Voltage

- V

Output

Current

- m

A

.

V = 5.0 V

O

C

I

C

O

L

VIN

EN

VOUT

GND

L

V

OUT

= 5.0 V

DC/DC Converter

TPS81256SIP

ENABLE

GND

4.7µF

16V X5R (0603)

V

IN

2.5 V .. 4.85 V

Product

Folder

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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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.

TPS81256

SLVSAZ9C – JUNE 2012 – REVISED FEBRUARY 2016

TPS81256 3-W, High Efficiency Step-Up Converter In MicroSiP™ Packaging

1

1 Features

1

•

91% Efficiency at 4MHz Operation

•

•

•

Fixed Output Voltage 5.0V

•

±2% Total DC Voltage Accuracy

•

43µA Supply Current

•

Best-in-Class Line and Load Transient

•

•

Low-Ripple Light-Load PFM Mode

•

True Load Disconnect During Shutdown

•

Thermal Shutdown and Overload Protection

•

Sub 1-mm Profile Solution

•

•

9-Pin MicroSiP Packaging

2 Applications

•

Cell Phones, Smart-Phones, Tablet PCs

•

Mono and Stereo APA Applications

•

USB-OTG, HDMI Applications

•

USB Charging Port (5V)

3 Description

The TPS81256 device is a complete MicroSiP DC/DC

step-up power solution intended for battery-powered

portable applications. Included in the package are the

switching

regulator,

inductor

and

input/output

capacitors. Only a tiny additional output capacitor is

required to finish the design.

The

TPS81256

is

based

on

a

high-frequency

synchronous step-up DC/DC converter optimized for

battery-powered portable applications.

The DC/DC converter operates at a regulated 4-MHz

switching frequency and enters power-save mode

operation at light load currents to maintain high

efficiency over the entire load current range.

The PFM mode extends the battery life by reducing

the supply current to 43

μA (typical) during light load

operation. Intended for low-power applications, the

TPS81256 supports more than 3W output power over

a full Li-Ion battery voltage range. Input current in

shutdown mode is less than 1µA (typical), which

maximizes battery life.

The TPS81256 offers a very small solution size of

components. The solution is packaged in a compact

(2.6mm x 2.9mm) and low profile (1.0mm) BGA

package

suitable

for

automated

assembly

by

standard surface mount equipment.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS81256

µSIP (9)

2.925 mm × 2.575 mm

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

the end of the datasheet.

Efficiency vs Load Current

Typical Application