LM4510SDEV Datasheet, PDF (1/23 Pages) Texas Instruments – LM4510 Synchronous Step-Up DC/DC Converter with True Shutdown Isolation

LM4510
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SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013
LM4510 Synchronous Step-Up DC/DC Converter with True Shutdown Isolation
Check for Samples: LM4510
FEATURES
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•2 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 SON Package (3mm x 3mm
x 0.8mm)
APPLICATIONS
• Organic LED Panel Power Supply
• Charging Holster
• White LED Backlight
• USB Power Supply
• Class D Audio Amplifier
• Camera Flash LED Driver
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 switching operation at light-load,
maximizes power efficiency.
True shutdown function by synchronous FET and
related circuitry 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.
Typical Application Circuit
V_IN 2.7V ± 5.5V
L = 4.7 PH
C_IN
4.7 PF
C_S
10 nF
VIN
SW VOUT
EN
FB
SS
COMP
PGND AGND
V_OUT 16.0V
R_F1
240k
R_F2
R_C
46.4k
C_C2
C_C1 ^{15 pF}
2.2 nF
20.5k
C_OUT
10 PF
LOAD
Figure 1. Typical Application Circuit
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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