Datasheet LTC3779 (Analog Devices) - 7

LTC3779
TYPICAL PERFORMANCE CHARACTERISTICS Forced Continuous Mode Pulse-Skipping Mode Forced Continuous Mode Boost Region Boost Region Buck-Boost Region
SW1 SW1 SW1 100V/DIV 100V/DIV 100V/DIV SW2 SW2 SW2 100V/DIV 100V/DIV 100V/DIV IL IL IL 5A/DIV 5A/DIV 1A/DIV VOUT VOUT VOUT 200mV/DIV 200mV/DIV 200mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED 5µs/DIV 3779 G09 5µs/DIV 3779 G10 5µs/DIV 3779 G11 VIN = 24V VIN = 24V VIN = 48V VOUT = 48V VOUT = 48V VOUT = 48V ILOAD = 0A ILOAD = 0A ILOAD = 0A
Pulse-Skipping Mode Forced Continuous Mode Pulse-Skipping Mode Buck-Boost Region Buck Region Buck Region
SW1 SW1 SW1 100V/DIV 100V/DIV 100V/DIV SW2 SW2 SW2 100V/DIV 100V/DIV 100V/DIV IL IL IL 1A/DIV 5A/DIV 5A/DIV VOUT VOUT VOUT 200mV/DIV 200mV/DIV 200mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED 5µs/DIV 3779 G12 5µs/DIV 3779 G13 5µs/DIV 3779 G14 VIN = 48V VIN = 120V VIN = 120V VOUT = 48V VOUT = 48V VOUT = 48V ILOAD = 0A ILOAD = 0A ILOAD = 0A
Start-Up from RUN Forced Continuous Mode Start-Up Forced Continuous Mode Start-Up Forced Continuous Mode Pre-Biased Output Boost Region Buck-Boost Region
SW1 50V/DIV SW1 SW1 100V/DIV 100V/DIV SW2 SW2 SW2 50V/DIV 100V/DIV 100V/DIV I I L L IL 5A/DIV 500mA/DIV 500mA/DIV VOUT V V OUT OUT 50V/DIV 50V/DIV 50V/DIV 3779 G16 3779 G17 2.5ms/DIV 3779 G15 5ms/DIV 5ms/DIV VIN = 24V VIN = 24V VIN = 48V VOUT = 48V VOUT = 48V VOUT = 48V VOUT PRE-BIAS = 12V 15Ω RESISTIVE LOAD 15Ω RESISTIVE LOAD 200mA LOAD Rev A For more information www.analog.com 7 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS