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LTC3204B-5 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3204B-5 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page LTC3204-3.3/LTC3204-5/ LTC3204B-3.3/LTC3204B-5 1 3204fa FEATURES DESCRIPTIO TYPICAL APPLICATIO TheLTC®3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are low noise, constant frequency (1.2MHz) switched ca- pacitorvoltagedoublers.TheLTC3204-3.3/LTC3204B-3.3 can produce a regulated output voltage of 3.3V from a minimum input voltage of 1.8V (2 alkaline cells) whereastheLTC3204-5/LTC3204B-5canproduce5Vfrom 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 frequencyoperationatanyload.Built-insoft-startcircuitry preventsexcessiveinrushcurrentduringstart-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 capaci- tors. 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. Low Noise Regulated Charge Pump in 2 × 2 DFN ■ 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 ■ 2 AA Cell to 3.3V ■ Li-Ion to 5V ■ USB On-The-Go Devices ■ White LED Drivers ■ Handheld Devices Output Ripple vs Load Current Burst Mode is a registered trademark of Linear Technology Corporation. *Protected by U.S. Patents including 6411531. APPLICATIO S , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. OFF ON VIN GND SHDN VOUT C– C+ LTC3204-5/ LTC3204B-5 2.2 µF 2.2 µF 2.2 µF 5V 2.7V TO 5.5V 3204 TA01a 1, 7 2 3 4 5 6 OUTPUT CURRENT (mA) 0 0 5 10 15 20 30 25 50 75 100 3204 TA01b 125 150 25 OUTPUT CAPACITANCE = 2.2 µF VIN = 3.6V LTC3204B-5 LTC3204-5 |
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