Datasheet LT3976 (Analog Devices) - 8

LT3976
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Start-Up/Dropout Performance Start-Up/Dropout Performance Burst Mode Switching Waveforms
VIN V VIN VIN 1V/DIV IN 1V/DIV VSW VOUT VOUT 5V/DIV I V L OUT VOUT 0.5A/DIV 1V/DIV 1V/DIV VOUT 10mV/DIV 2.5Ω LOAD 100ms/DIV 3976 G33 1kΩ LOAD 100ms/DIV 3976 G34 V 3976 G35 IN = 12V 5µs/DIV (2A IN REGULATION) (5mA IN REGULATION) VOUT = 3.3V ILOAD = 20mA COUT = 47µF
Full Frequency Switching Waveforms Dropout Switching Waveforms
VSW VSW 5V/DIV 2V/DIV IL IL 1A/DIV 1A/DIV VOUT VOUT 20mV/DIV 50mV/DIV V 3976 G36 3976 G37 IN = 12V 1µs/DIV VIN = 5V 5µs/DIV VOUT = 3.3V VOUT SET FOR 5V ILOAD = 1A ILOAD = 0.5A COUT = 47µF COUT = 47µF
Load Transient: 0.5A to 4.5A Load Transient: 10mA to 4A
IL IL 2A/DIV 2A/DIV VOUT VOUT 200mV/DIV 500mV/DIV 12V 3976 G38 IN 50µs/DIV 50µs/DIV 3976 G39 12VIN 3.3VOUT 3.3VOUT COUT = 2 × 47µF COUT = 2 × 47µF 3976f 8 For more information www.linear.com/3976 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts