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FEATURES

APPLICATIONS

DESCRIPTION

EN_DCDC1

ENABLE

VCC

VLDO1

200 mA LDO

VLDO1

VLDO2

VINDCDC1

VLDO2

200 mA LDO

VIN_LDO

ENABLE

VIN

MODE

1 mF

1R

10 mF

TPS650250

EN_LDO

Vbat

PWRFAIL

AGND1

I/Ovoltage

R19

L1

DEFDCDC1

VDCDC1

PGND1

DCDC1 (I/O)

STEP-DOWN

CONVERTER

1600 mA

R1

R2

EN_DCDC2

VINDCDC2

L2

DEFDCDC2

VDCDC2

PGND2

DCDC2

(memory)

STEP-DOWN

CONVERTER

800 mA

R3

R4

EN_DCDC3

VINDCDC3

L3

DEFDCDC3

VDCDC3

PGND3

DCDC3 (core)

STEP-DOWN

CONVERTER

800 mA

R7

R8

Vbat

Vbat

Vbat

Vdd_alive

VLDO3

30 mA LDO

2.2 mF

1 V

3.3 V / 2.8 V

oradjustable

2.5 V / 1.8 V

oradjustable

VCC

PWRFAIL_SNS

Vbat

Vref=1V

+

-

R11

R12

AGND2

PWM/ PFM

EN_Vdd_alive

ENABLE

R9

R10

R5

R6

10 mF

ENABLE

10 mF

ENABLE

2.2 mF

2.2 mF

22 mF

2.2 mH

22 mF

2.2 mH

22 mF

2.2 mH

FB_LDO1

FB_LDO2

TPS650250

Power Management IC for Li-Ion Powered Systems

The TPS650250 also integrates two general purpose

200mA LDO voltage regulators, which are enabled

• 1.6A, 97% Efficient Step-Down Converter for

with an external input pin. Each LDO operates with

System Voltage (VDCDC1)

an input voltage range between 1.5V and 6.5V

–

3.3V or 2.8V or Adjustable

allowing them to be supplied from one of the

step-down converters or directly from the battery. The

• 0.8A, up to 95% Efficient Step-Down Converter

output voltage of the LDOs can be set with an

for Memory Voltage (VDCDC2)

external

resistor

divider

for

maximum

flexibility.

–

1.8V or 2.5V or Adjustable

Additionally there is a 30mA LDO typically used to

• 0.8A, 90% Efficient Step-Down Converter for

provide power in a processor based system to a

Processor Core (VDCDC3)

voltage rail that is always on. TPS650250 comes in a

small 5mm x 5mm 32 pin QFN package (RHB).

• adjustable output voltage on VDCDC3

• 30mA LDO for Vdd_alive

Functional Block Diagram

• 2 × 200mA General Purpose LDOs (LDO1 and

LDO2)

• Dynamic Voltage Management for Processor

Core

• LDO1 and LDO2 Voltage Externally Adjustable

• Separate Enable Pins for Inductive Converters

• 2.25MHz Switching Frequency

• 85µA Quiescent Current

• Thermal Shutdown Protection

• Cellular/Smart Phone

• GPS

• Digital Still Camera

• Split Supply DSP and µP Solutions

• Samsung ARM-Based Processors, etc.

The TPS650250 is an integrated Power Management

IC

for

applications

powered

by

one

Li-Ion

or

Li-Polymer cell, which require multiple power rails.

The TPS650250 provides three highly efficient,

step-down converters targeted at providing the core

voltage, peripheral, I/O and memory rails in a

processor

based

system.

All

three

step-down

converters enter a low power mode at light load for

maximum efficiency across the widest possible range

of load currents. The converters can be forced into

fixed frequency PWM mode by pulling the MODE pin

high.

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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 © 2008, 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.