C1

10PFx2

L1

4.7PH

OUTP

2.9V to 4.5V

C2

10PF

4.62V/300mA

PGND

-4.9V/300mA

GND

CT

C3

10PF x 2

C4

100nF

PVIN

SWP

TPS65138

CTRL

L2

4.7PH

SWN

OUTN

VL

Enable and

C5

100nF

TPS65138

TPS65138A

www.ti.com

SLVSAV3C – APRIL 2011 – REVISED MAY 2012

Dual output AMOLED Display Power Supply

Check for Samples: TPS65138, TPS65138A

1

FEATURES

APPLICATIONS

•

2.9V to 4.5V Input Voltage Range

•

Active Matrix OLED

•

•

Excellent Line Transient Regulation

•

300mA Output Current

•

Fixed 4.62V Positive Output Voltage

•

–

TPS65138: -2.2V to -6.2V

–

TPS65138A: -2.2V to -5.2V

•

•

Short Circuit Protection

•

Thermal Hhutdown

•

3-mm × 3-mm QFN Package

DESCRIPTION

The TPS65138 is designed to drive AMOLED displays (Active Matrix Organic Light Emitting Diode) requiring

positive and negative supply rails. The device integrates boost converter and inverting buck boost converter

designed suitable for battery operated products. The digital control pin (CTRL) allows programming the negative

output voltage in digital steps. The TPS65138 uses a novel technology enabling excellent line and load

regulation. This is required to avoid disturbance of the AMOLED display by the input voltage disturbances

occurring during transmit periods in mobile phones.

TYPICAL APPLICATION SCHEMATIC

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2011–2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.