OUTPUT CURRENT (mA)

100

90

80

70

60

50

40

30

20

10

0

0.1

1

10

100

1000

2.7V

3.6V

2.3V

4.2V

L = 0.5 µH, FDK

LM8801

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SNVS597H – APRIL 2009 – REVISED MAY 2013

LM8801 High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for

Mobile Applications

Check for Samples: LM8801

1

FEATURES

APPLICATIONS

2

•

Over 90% Efficiency at 6 MHz Operation

•

Mobile Phones

•

600 mA Maximum Load Capability

•

MP3 players

•

6 MHz PWM Fixed Switching Frequency (typ.)

•

Wireless LAN

•

27 µA (typ.) Quiescent Current in PFM Mode

•

PDAs, Pocket PCs

•

Wide Input Voltage Range: 2.3V to 5.5V

•

Portable Hard Disk Drives

•

DESCRIPTION

•

±1.5% DC Output Voltage Precision Over

The

LM8801

step-down

DC-DC

converter

is

Temperature

optimized for powering ultra-low voltage circuits from

•

Best-in-Class Load Transient Response

a single Li-Ion cell and input voltage rails from 2.3V to

•

Low Output Ripple in PFM Mode

5.5V. It provides up to 600 mA load current over the

entire input voltage range.

•

Automatic PFM/PWM Mode Switching

•

Current Overload and Thermal Shutdown

The LM8801 has a mode-control pin that allows the

user to select continuous PWM operation over the

Protection

complete load range or an auto PFM-PWM mode that

•

Internal Soft-Start

changes modes automatically depending on the load.

•

6-bump DSBGA Package

During PWM mode, the device operates at a fixed-

frequency of 6 MHz (typ.). In Auto PFM-PWM mode,

–

(1.065 x 1.265 , 0.6 mm or 0.25 mm height)

hysteretic PFM extends the battery life through

•

reduction of the quiescent current during light loads

capacitors)

and system standby.

•

UVLO

The LM8801 is available in a 6-bump DSBGA

package. Only three compact external surface-mount

components, an inductor and two capacitors, are

required.

Efficiency vs. Output Current

Typical Application Circuit

1

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

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009–2013, 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.