LM4510 - Synchronous Step-Up DC/DC Converter with True Shutdown Isolation from the PowerWise® Family

Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

Features
•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)

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. More...


Applications

•Organic LED Panel Power Supply
•Charging Holster
•White LED Backlight
•USB Power Supply
•Class D Audio Amplifier
•Camera Flash LED Driver
  Typical Application
*click for larger image


Parametric Table     expand
Parametric Table    collapse
Switch Current 1.2 Amp
Input Min Voltage 2.7 Volt
Input Max Voltage 5.5 Volt
Feedback Voltage 1.265 Volt
Frequency Max 100 kHz
Efficiency (peak) 85 %
Switch Current 1.2 Amp
Input Min Voltage 2.7 Volt
Input Max Voltage 5.5 Volt
Feedback Voltage 1.265 Volt
Frequency Max 100 kHz
Efficiency (peak) 85 %
Output Max 18 Volt
Sync Pin No
Adj Switch Frequency No
Frequency Min 85 kHz
On/Off Pin Yes
Error Flag No
SoftStart Yes
Special Features True shutdown
Topology Boost
Step-Up Yes
Inverting No
Flyback No
RegType Switching Regulator
Adjustable Output Yes
Output Power 1.4 Watt
Temperature Min -40 deg C
Temperature Max 85 deg C
PowerWise Yes
View Using Catalog


Typical Performance

click for larger image

IQ vs VIN
  Block Diagram
*click for larger image

block diagram

Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4510 Synchronous Step-Up DC/DC Converter with True Shutdown Isolation 2422 Kbytes 2-Oct-07 View Online
Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM4510SDEVSynchronous Step-Up DC/DC Converter with True Shutdown IsolationFull productionN/A
 
Buy Now 		1+$55.001-
6 weeksN/A
LM4510SDLLP10NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$1.80reel
of
1000		ZXYTT
L4510
6 weeksN/A
LM4510SDXLLP10NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.80reel
of
4500		ZXYTT
L4510
12 weeksN/A

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 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.

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.

The LM4510 is available in a 10-pin thermally enhanced Leadless Leadframe Package: LLP-10.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM * LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM4510SDABCD1500282800029740002843880620
LM4510SDXABCD1500282800029740002843880620

Note: The Early Failure Rates were calculated as point estimates. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1697: Application Note 1697 LM4510 Evaluation Board 1052 Kbytes 27-Sep-07 Download
AN-1777: Application Note 1777 Designing Energy-Efficient Handheld Illumination Solutions 156 Kbytes 27-Feb-08 Download

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[Information as of 20-Nov-2008]