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FB

PG

VIN

8

LBO

GND

SYNC

EN

LBI

PGND

TPS62052

SW

1

6

7

3

2

9

5

4

10

L1 = 10

µH

TYPICAL APPLICATION CIRCUIT

50

30

10

0.01

0.1

1

10

60

70

TPS62050

EFFICIENCY

vs

OUTPUT CURRENT

100

100

1 k

80

20

0

40

90

SYNC = L

TPS62050, TPS62051

TPS62052, TPS62054, TPS62056

SLVS432D – SEPTEMBER 2002 – REVISED OCTOBER 2003

800-mA SYNCHRONOUS STEP-DOWN CONVERTER

FEATURES

DESCRIPTION

•

High-Efficiency Synchronous Step-Down

The TPS6205x devices are a family of high-efficiency

Converter With up to 95% Efficiency

synchronous step-down dc/dc converters ideally suited

•

12-µA Quiescent Current (Typ)

for systems powered from a 1-cell or 2-cell Li-Ion

battery or from a 3-cell to 5-cell NiCd, NiMH, or alkaline

•

2.7-V to 10-V Operating Input Voltage Range

battery.

•

Adjustable Output Voltage Range From 0.7 V

to 6 V

The TPS62050 is a synchronous PWM converter with

integrated N-channel and P-channel power MOSFET

•

Fixed Output Voltage Options Available in

switches. Synchronous rectification increases ef-

1.5 V, 1.8 V, and 3.3 V

ficiency and reduces external component count. To

•

Synchronizable to External Clock Signal up to

achieve highest efficiency over a wide load current

1.2 MHz

range,

the

converter

enters

a

power-saving

•

High Efficiency Over a Wide Load Current

pulse-frequency modulation (PFM) mode at light load

Range in Power-Save Mode

currents. Operating frequency is typically 850 kHz,

•

100% Maximum Duty Cycle for Lowest

allowing the use of small inductor and capacitor values.

Dropout

The device can be synchronized to an external clock

•

Low Noise Operation in Forced Fixed

signal in the range of 600 kHz to 1.2 MHz. For low noise

Frequency PWM Operation Mode

operation, the converter can be programmed into

forced-fixed frequency in PWM mode. In shutdown

•

Internal Softstart

mode, the current consumption is reduced to less than

•

Overtemperature and Overcurrent Protected

2 µA. The TPS6205x is available in the 10-pin (DGS)

•

Available in 10-Pin Microsmall Outline

micro-small outline package (MSOP) and operates

Package MSOP

over an free air temperature range of -40

°C to 85°C.

APPLICATIONS

•

Cellular Phones

•

Organizers, PDAs, and Handheld PCs

•

Low Power DSP Supply

•

Digital Cameras and Hard Disks

MATHCAD is a trademark of Mathsoft Incorporated.

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 © 2002 – 2003, Texas Instruments Incorporated

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily in-

clude testing of all parameters.