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LTC3539

Features: ` Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells` Delivers 5V at 900mA From a Lithium-Polymer Battery` VIN Start-Up Voltage: 700mV` 1.5V to 5.25V VOUT Range` Up to 94% Effi ciency` VIN > VOUT Operation` 1MHz (LTC3539) or 2MHz (LTC3539-2) Fixed Frequency Operation` Output Disc...

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SeekIC No. : 004402278 Detail

LTC3539: Features: ` Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells` Delivers 5V at 900mA From a Lithium-Polymer Battery` VIN Start-Up Voltage: 700mV` 1.5V to 5.25V VOUT Range` Up to 94% Effi ciency...

LTC3539 Data Sheet

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Part Number:
LTC3539
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells
` Delivers 5V at 900mA From a Lithium-Polymer Battery
` VIN Start-Up Voltage: 700mV
` 1.5V to 5.25V VOUT Range
` Up to 94% Effi ciency
` VIN > VOUT Operation
` 1MHz (LTC3539) or 2MHz (LTC3539-2) Fixed Frequency Operation
` Output Disconnect
` Selectable Burst Mode® or PWM Operation
` 10A Quiescent Current
` Logic Controlled Shutdown: <1A
` Requires Only 6 External Components
` Low Profi le (2mm * 3mm * 0.75mm) DFN Package


Application

· Medical Instruments
· Portable Bar Code Scanners
· Noise Canceling Headphones
· Portable GPS Navigation
· Handheld PCs



Pinout

Connection Diagram


Specifications

VIN Voltage ................................................... 0.3V to 6V
SW Voltage
   DC .............................................................. 0.3V to 6V
   Pulsed <100ns ........................................... 0.3V to 7V
SHDN, FB, MODE Voltage ............................... 0.3V to 6V
VOUT ............................................................. 0.3V to 6V
Operating Temperature (Notes 2, 5) .......... 40 to 85
Storage Temperature Range .................... 65 to 125


Description

The LTC®3539/LTC3539-2 are synchronous, 2A step-up DC/DC converters with output disconnect. Synchronous rectifi cation enables high effi ciency in the low profi le 2mm * 3mm DFN package. Battery life is extended with a 700mV start-up voltage and operation down to 500mV once started.

A switching frequency of 1MHz (LTC3539) or 2MHz (LTC3539-2) minimizes solution footprint by allowing the use of tiny, low profi le inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. The LTC3539/LTC3539-2 feature a pin-enabled automatic Burst Mode operation at light load conditions. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1A and thermal overload protection.

The LTC3539/LTC3539-2 are offered in a 2mm * 3mm * 0.75mm DFN package.




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