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LTC3564IDCB-TRPBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC3564IDCB-TRPBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 20 page 1 LTC3564 3564f ■ High Efficiency: Up to 96% ■ Very Low Quiescent Current: Only 20 μA ■ 1.25A Output Current ■ 2.5V to 5.5V Input Voltage Range ■ 2.25MHz Constant Frequency Operation ■ No Schottky Diode Required ■ Low Dropout Operation: 100% Duty Cycle ■ 0.6V Reference Allows Low Output Voltages ■ Shutdown Mode Draws ≤1μA Supply Current ■ Current Mode Operation for Excellent Line and Load Transient Response ■ Overtemperature Protected ■ Low Profile (1mm) ThinSOT TM and 6-Lead (2mm × 3mm) DFN Packages The LTC ®3564 is a high efficiency monolithic synchro- nous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20 μA, dropping to ≤1μA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3564 ideally suited for single Li-Ion battery-powered or 3.3V to 5V input voltage applications. 100% duty cycle provides low drop- out operation, extending battery life in portable systems. Automatic Burst Mode ® operation increases efficiency at light loads, further extending battery runtime. Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feed- back reference voltage. The LTC3564 is available in low profile (1mm) ThinSOT and 6-Lead (2mm × 3mm) DFN packages. ■ Cellular Telephones ■ Wireless and DSL Modems ■ Digital Still Cameras ■ Media Players ■ Portable Instruments ■ Point of Load Regulation 2.25MHz, 1.25A Synchronous Step-Down Regulator FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 6580258, 6304066, 6498466, 6611131. VIN CIN 22 μF CER VIN LTC3564 RUN 1.1 μH 22pF 634k 316k 3564 TA01a SW VFB GND COUT 22 μF CER VOUT 1.8V OUTPUT CURRENT (mA) 0.1 40 50 60 70 80 1 10 100 1000 10000 3564 TA01b 30 20 10 0 90 100 0.0001 0.001 0.01 0.1 0.00001 1 10 VOUT = 1.8V VIN = 2.7V VIN = 3.6V VIN = 4.2V |
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