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TPS61253, TPS61254, TPS61256, TPS61258, TPS61259

SLVSAG8E – SEPTEMBER 2011 – REVISED MARCH 2015

TPS6125x 3.5-MHz High Efficiency Step-Up Converter In Chip Scale Packaging

The TPS6125x operates at a regulated 3.5-MHz

1 Features

switching frequency and enters power-save mode

1

•

93% Efficiency at 3.5-MHz Operation

operation at light load currents to maintain high

•

21-µA Quiescent Current in Standby Mode

efficiency over the entire load current range. The

PFM mode extends the battery life by reducing the

•

37-µA Quiescent Current in Normal Operation

quiescent current to 37

μA (typ) during light load

•

operation.

•

In addition, the TPS6125x device can also maintain

•

its output biased at the input voltage level. In this

•

mode, the synchronous rectifier is current limited

allowing external load (e.g. audio amplifier) to be

•

powered with a restricted supply. In this mode, the

V

quiescent current is reduced to 21 µA. During

•

±2% Total DC Voltage Accuracy

shutdown, the load is completely disconnected from

•

Light-Load PFM Mode

the battery. Input current in shutdown mode is less

than 1 µA (typ), which maximizes battery life.

•

Selectable Standby Mode or True Load

Disconnect During Shutdown

The TPS6125x offers a very small solution size due

•

Thermal Shutdown and Overload Protection

to minimum amount of external components. It allows

the use of small inductors and input capacitors to

•

Only Three Surface-Mount External Components

achieve a small solution size.

Required

•

•

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS6125x

DSBGA (9)

1.206 mm × 1.306 mm

2 Applications

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

•

Cell Phones, Smart Phones

the end of the datasheet.

•

Mono and Stereo APA Applications

Efficiency vs Load Current

•

USB Charging Ports (5V)

3 Description

The TPS6125x device provides a power supply

solution for battery-powered portable applications.

Intended for low-power applications, the TPS6125x

supports up to 800-mA load current from a battery

discharged as low as 2.65V and allows the use of low

cost chip inductor and capacitors.

With a wide input voltage range of 2.3 V to 5.5 V, the

device supports applications powered by Li-Ion

batteries with extended voltage range. Different fixed

voltage output versions are available from 3.15 V to

5.0 V.

1

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.