LM4510SDX+ National Semiconductor, LM4510SDX+ Datasheet
LM4510SDX+
Manufacturer Part Number
LM4510SDX+
Description
Manufacturer
National Semiconductor
Specifications of LM4510SDX+
Notes
NEW
Date_code
10+
© 2007 National Semiconductor Corporation
LM4510
Synchronous Step-Up DC/DC Converter with True
Shutdown Isolation
General Description
The LM4510 is a current mode step-up DC/DC converter with
a 1.2A internal NMOS switch designed to deliver up to 120
mA at 16V from a Li-Ion battery.
The device's synchronous switching operation (no external
Schottky diode) at heavy-load, and non-synchronous switch-
ing operation at light-load, maximizes power efficiency.
True shutdown function by synchronous FET and related cir-
cuitry ensures input and output isolation.
A programmable soft-start circuit allows the user to limit the
amount of inrush current during startup. The output voltage
can be adjusted by external resistors.
The LM4510 features advanced short-circuit protection to
maximize safety during output to ground short condition. Dur-
ing shutdown the feedback resistors and the load are discon-
nected from the input to prevent leakage current paths to
ground.
The LM4510 is available in a 10-pin thermally enhanced
Leadless Leadframe Package: LLP-10.
Typical Application Circuit
300310
FIGURE 1. Typical Application Circuit
Features
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Applications
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18V@80 mA from 3.2V input
5V@280 mA from 3.2V input
No external Schottky diode required
85% peak efficiency
Soft start
True shutdown isolation
Stable with small ceramic or tantalum output capacitors
Output short-circuit protection
Feedback fault protection
Input under-voltage lock out
Thermal shutdown
0.002 µA shutdown current
Wide input voltage range: 2.7V to 5.5V
1.0 MHz fixed frequency operation
Low-profile 10–pin LLP package (3mm x 3mm x 0.8mm)
Organic LED Panel Power Supply
Charging Holster
White LED Backlight
USB Power Supply
Class D Audio Amplifier
Camera Flash LED Driver
30031001
www.national.com
October 2007
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