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LTC3203B-1

Linear
Part Number LTC3203B-1
Manufacturer Linear
Description 500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps
Published Apr 16, 2016
Detailed Description U U FEATURES ■ Selectable Dual Mode Operation: 1:1.5 or 1:2 ■ High Output Current: Up to 500mA ■ Low Noise Constant Fre...
Datasheet PDF File LTC3203B-1 PDF File

LTC3203B-1
LTC3203B-1

Overview
U U FEATURES ■ Selectable Dual Mode Operation: 1:1.
5 or 1:2 ■ High Output Current: Up to 500mA ■ Low Noise Constant Frequency (1MHz/0.
9MHz) Operation* ■ VIN Range: 2.
7V to 5.
5V ■ Adjustable Output Voltage (LTC3203/LTC3203B) ■ User Selectable Fixed Output Voltages: 4.
5V or 5V (LTC3203-1 and LTC3203B-1) ■ Burst Mode® Operation with IQ ~ 120µA (LTC3203/LTC3203-1) ■ Constant Freqency Operation at All Loads (LTC3203B/LTC3203B-1) ■ Soft-Start Limits Inrush Current at Turn-On ■ Short-Circuit/Thermal Protection ■ Shutdown Disconnects Load from Input ■ Shutdown Current: < 1µA ■ Available in a 10-pin (3mm × 3mm) DFN Package U APPLICATIO S ■ High Current LED Backlight Supply for Cellphones/PDAs ■ Cellphone Camera Light Supply ■ General Purpose 3.
3V or Li-Ion to 5V Supply ■ USB ON THE GO(OTG) Devices LTC3203/LTC3203-1 LTC3203B/LTC3203B-1 500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps DESCRIPTIO The LTC®3203/LTC3203-1/LTC3203B/LTC3203B-1 are low noise, high efficiency charge pump DC/DC converters capable of driving loads up to 500mA from a 2.
7V to 5.
5V input.
Low external parts count (two flying capacitors and bypass capacitors at VIN and VOUT) make the LTC3203 family ideally suited for small, battery-powered applications.
Built-in soft-start circuitry prevents excessive inrush current during start-up.
High switching frequency enables the use of small external capacitors.
The LTC3203/ LTC3203-1 feature Burst Mode operation at light load to achieve high efficiency whereas the LTC3203B/ LTC3203B-1 operate at constant frequency to achieve lowest noise operation.
The LTC3203-1/LTC3203B-1 have a user selectable fixed output voltage of 4.
5V or 5V to power LEDs or logic circuits.
The FB pin of the LTC3203/LTC3203B can be used to program the desired output voltage.
The parts are shortcircuit and overtemperature protected and are available in a low profile (3mm × 3mm) DFN package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is...


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