LM4510_15 Datasheet, PDF (1/30 Pages) Texas Instruments – LM4510 Synchronous Step-Up DC/DC Converter with True Shutdown Isolation

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LM4510
SNVS533D – SEPTEMBER 2007 – REVISED NOVEMBER 2014
LM4510 Synchronous Step-Up DC/DC Converter with True Shutdown Isolation
1 Features
•1 18 V@ 80 mA from 3.2 V Input
• 5 V @ 280 mA from 3.2 V 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 Undervoltage Lock Out
• Thermal Shutdown
• 0.002-µA Shutdown Current
• Wide Input Voltage Range: 2.7 V to 5.5 V
• 1-MHz Fixed Frequency Operation
• Low-profile 10-pin WSON Package (3 mm x 3 mm
x 0.8 mm)
2 Applications
• Organic LED Panel Power Supply
• Charging Holster
• White LED Backlight
• USB Power Supply
• Class D Audio Amplifier
• Camera Flash LED Driver
3 Description
The LM4510 is a current mode step-up DC/DC
converter with a 1.2-A internal NMOS switch
designed to deliver up to 120 mA at 16 V 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 start-up. 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. During shutdown the feedback
resistors and the load are disconnected from the
input to prevent leakage current paths to ground.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM4510
WSON (10)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
space
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VIN 2.7V ± 5.5V
CIN
4.7 2F
CS
10 nF
Typical Application Circuit
L = 4.7 2H
VIN
SW VOUT
EN
FB
SS
COMP
PGND AGND
VOUT 16.0V
RF1
240k
RF2
RC
46.4k
CC2
CC1 15 pF
2.2 nF
20.5k
COUT
10 2F
LOAD
Efficiency at V_OUT = 16 V
100
V_IN = 5.5V
V_IN = 4.5V
90
80
70
V_IN = 2.7V
VIN = 3.6V
60
50
40
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
I_OUT (mA)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.