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LTC3204

Part Number	LTC3204
Manufacturer	Linear Technology
Description	Low Noise Regulated Charge Pump
Published	Feb 1, 2009
Detailed Description	LTC3204-3.3/LTC3204-5/ LTC3204B-3.3/LTC3204B-5 Low Noise Regulated Charge Pump in 2 × 2 DFN U U FEATURES ■ Fixed 3.3V ...
Datasheet	LTC3204 PDF File

Overview

LTC3204-3.
3/LTC3204-5/ LTC3204B-3.
3/LTC3204B-5 Low Noise Regulated Charge Pump in 2 × 2 DFN U U FEATURES ■ Fixed 3.
3V or 5V Outputs ■ VIN Range: 1.
8V to 4.
5V (LTC3204-3.
3/LTC3204B-3.
3) 2.
7V to 5.
5V (LTC3204-5/LTC3204B-5) ■ Output Current: Up to 150mA (LTC3204-5/LTC3204B-5) Up to 50mA (LTC3204-3.
3/LTC3204B-3.
3) ■ Automatic Burst Mode® Operation with IQ = 48µA (LTC3204-3.
3/LTC3204-5) ■ Constant Frequency Operation at All Loads (LTC3204B-3.
3/LTC3204B-5) ■ Low Noise Constant Frequency (1.
2MHz) Operation* ■ Built-In Soft-Start Reduces Inrush Current ■ Shutdown Disconnects Load from Input ■ Shutdown Current <1µA ■ Short-Circuit/Thermal Protection ■ Available in Low Proﬁle 6-Lead DFN Package U APPLICATIO S ■ 2 AA Cell to 3.
3V ■ Li-Ion to 5V ■ USB On-The-Go Devices ■ White LED Drivers ■ Handheld Devices DESCRIPTIO The LTC®3204-3.
3/LTC3204-5/LTC3204B-3.
3/LTC3204B-5 are low noise, constant frequency (1.
2MHz) switched capacitor voltage doublers.
The LTC3204-3.
3/LTC3204B-3.
3 can produce a regulated output voltage of 3.
3V from a minimum input voltage of 1.
8V (2 alkaline cells) whereas the LTC3204-5/LTC3204B-5 can produce 5V from a minimum of 2.
7V (Li-Ion battery) input.
LTC3204-3.
3/LTC3204-5 feature automatic Burst Mode® operation at light loads to maintain low supply current whereas LTC3204B-3.
3/LTC3204B-5 feature constant frequency operation at any load.
Built-in soft-start circuitry prevents excessive inrush current during start-up.
Thermal shutdown and current-limit circuitry allow the parts to survive a continuous short-circuit from VOUT to GND.
High switching frequency minimizes overall solution footprint by allowing the use of tiny ceramic capacitors.
In shutdown, the load is disconnected from the input and the quiescent current is reduced to <1µA.
The LTC3204-3.
3/LTC3204-5/LTC3204B-3.
3/LTC3204B-5 are available in a low proﬁle (0.
75mm) 6-lead 2mm × 2mm DFN package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the pro...

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