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LM8801

National Semiconductor
Part Number LM8801
Manufacturer National Semiconductor
Description 600 mA Synchronous Step-Down DC-DC Converter
Published Sep 11, 2009
Detailed Description LM8801 High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications www.DataSheet4U.com A...
Datasheet PDF File LM8801 PDF File

LM8801
LM8801

Overview
LM8801 High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications www.
DataSheet4U.
com April 20, 2009 LM8801 High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications General Description The LM8801 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell and input voltage rails from 2.
3V to 5.
5V.
It provides up to 600 mA load current over the entire input voltage range.
The LM8801 has a mode-control pin that allows the user to select continuous PWM operation over the complete load range or an auto PFM-PWM mode that changes modes automatically depending on the load.
During PWM mode, the device operates at a fixed-frequency of 6 MHz (typ.
).
In Auto PFM-PWM mode, hysteretic PFM extends the battery life through reduction of the quiescent current during light loads and system standby.
The LM8801 is available in a 6-bump micro SMD package.
Only three compact external surface-mount components, an inductor and two capacitors, are required.
Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Over 90% efficiency at 6 MHz Operation 600 mA maximum load capability 6 MHz PWM fixed switching frequency (typ.
) 27 µA (typ.
) quiescent current in PFM mode Wide Input Voltage Range: 2.
3V to 5.
5V ±1.
5% DC output voltage precision over temperature Best-in-class load transient response Low output ripple in PFM mode Automatic PFM/PWM mode switching Current overload and thermal shutdown protection Internal soft-start Micro SMD 6–bump package (1.
065 x 1.
265 , 0.
6 mm height) ■ Total solution size < 7mm2 (works with 0402 capacitors) ■ UVLO Applications ■ ■ ■ ■ ■ Mobile Phones MP3 players Wireless LAN PDAs, Pocket PCs Portable Hard Disk Drives Typical Application Circuit Efficiency vs.
Output Current (Auto Mode, VOUT = 1.
82V) 30082230 30082201 © 2009 National Semiconductor Corporation 300822 www.
national.
com LM8801 www.
DataSheet4U.
com Connection Diagram and Package Mark Information 30082206...


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