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LTC3526 Datasheet(PDF) 7 Page - Linear Integrated Systems |
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LTC3526 Datasheet(HTML) 7 Page - Linear Integrated Systems |
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7 / 16 page  LTC3526/LTC3526B 3526bfd 3 + – GATE DRIVERS AND ANTI-CROSS CONDUCTION LOGIC CLK IPK IPK COMP SLOPE COMP IZERO COMP ERROR AMP SLEEP COMP IZERO WAKE EXPOSED PAD + – WELL SWITCH MODE CONTROL UVLO VREF VREF 4M SHDN VBEST START-UP 1MHz OSC TSD THERMAL SHUTDOWN SHUTDOWN ANTI-RING VSEL VIN 1 6 SW VOUT L1 4.7µH VB SHUTDOWN CLAMP CSS VREF VOUT 5 7 GND 3526 BD 2 FB R2 COUT 4.7µF VOUT 1.6V TO 5.25V R1 4 CIN 2.2µF VIN 0.85V TO 5V block Diagram (Refer to Block Diagram) operaTion The LTC3526/LTC3526B are 1MHz synchronous boost converters housed in a 6-lead 2mm × 2mm DFN package. With the ability to start up and operate from inputs less than 1V, these devices feature fixed frequency, current mode PWM control for exceptional line and load regula- tion. The current mode architecture with adaptive slope compensation provides excellent transient load response, requiring minimal output filtering. Internal soft-start and internal loop compensation simplifies the design process while minimizing the number of external components. With its low RDS(ON) and low gate charge internal N-chan- nel MOSFET switch and P-channel MOSFET synchronous rectifier, the LTC3526 achieves high efficiency over a wide range of load currents. Automatic Burst Mode operation maintains high efficiency at very light loads, reducing the quiescent current to just 9µA. Operation can be best understood by referring to the Block Diagram. LOW VOLTAGE START-UP The LTC3526/LTC3526B include an independent start-up oscillator designed to start up at an input voltage of 0.85V (typical).Soft-startandinrushcurrentlimitingareprovided during start-up, as well as normal mode. When either VIN or VOUT exceeds 1.4V typical, the IC enters normal operating mode. When the output voltage |
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Similar Description - LTC3526 |
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