0

10

20

30

40

50

60

70

80

90

100

0.00001

0.001

0.01

0.1

1

I

-OutputCurrent- A

O

0.0001

V =2.3V

I

V =3V

I

V =3.6V

I

V =4.2V

I

1

H

m

V

IN

C

IN

C

OUT

4.7

F

m

V

OUT

5 V

L

2.2

F

m

L

VIN

EN

VOUT

FB

GND

TPS61240

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

TPS61240, TPS61241

SLVS806D – APRIL 2009 – REVISED DECEMBER 2015

TPS6124x 3.5-MHz High Efficiency Step-Up Converter

1 Features

3 Description

The

TPS6124x

device

is

a

highly

efficient

1

•

Efficiency > 90% at Nominal Operating Conditions

synchronous step-up DC-DC converter optimized for

•

Total DC Output Voltage Accuracy 5.0 V±2%

products powered by either a three-cell alkaline, NiCd

•

Typical 30-

μA Quiescent Current

or NiMH, or one-cell Li-Ion or Li-Polymer battery. The

TPS6124x supports output currents up to 450 mA.

•

Best in Class Line and Load Transient

The TPS61240 has an input valley current limit of 500

•

Wide VIN Range From 2.3 V to 5.5 V

mA, and the TPS61241 has an input valley current of

•

Output Current up to 450 mA

600 mA.

•

Automatic PFM/PWM Mode Transition

With an input voltage range of 2.3 V to 5.5 V, the

•

Low Ripple Power Save Mode for Improved

device supports batteries with extended voltage

Efficiency at Light Loads

range and are ideal to power portable applications

like mobile phones and other portable equipment.

•

Internal Softstart, 250-

μs Typical Start-Up Time

The TPS6124x boost converter is based on a quasi-

•

3.5-MHz Typical Operating Frequency

constant on-time valley current mode control scheme.

•

Load Disconnect During Shutdown

The TPS6124x presents a high impedance at the

•

Current Overload and Thermal Shutdown

VOUT pin when shut down. This allows for use in

Protection

applications that require the regulated output bus to

•

Three Surface-Mount External Components

be driven by another supply while the TPS6124x is

Required (One MLCC Inductor, Two Ceramic

shut down.

Capacitors)

During light loads the device will automatically pulse

•

Total Solution Size <13 mm2

skip allowing maximum efficiency at lowest quiescent

currents.

In

the

shutdown

mode,

the

current

•

Available in a 6-Pin DSBGA and 2-mm × 2-mm

consumption is reduced to less than 1

μA.

WSON Package

TPS6124x allows the use of small inductors and

2 Applications

capacitors to achieve a small solution size. During

shutdown, the load is completely disconnected from

•

USB-OTG Applications

the battery. The TPS6124x is available in a 6-pin

•

Portable HDMI Applications

DSBGA and 2-mm × 2-mm WSON package.

•

Cell Phones, Smart Phones

Device Information(1)

•

PDAs, Pocket PCs

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Portable Media Players

WSON (6)

2.00 mm × 2.00 mm

•

Digital Cameras

TPS61240

DSBGA (6)

1.25 mm × 0.86 mm

TPS61241

DSBGA (6)

1.25 mm × 0.86 mm

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

the end of the datasheet.

Typical Application Schematic

Efficiency vs Output Current

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. PRODUCTION DATA.