Datasheet LTC3129 (Analog Devices) - 7

LTC3129
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Fixed Frequency Ripple on VOUT Burst Mode Waveforms Burst Mode Ripple on VOUT
V SW1 V OUT OUT 20mV/DIV 5V/DIV 100mV/DIV SW2 5V/DIV IL 200mA/DIV IL IL 200mA/DIV 100mA/DIV 3129 G22 200ns/DIV 3129 G23 3129 G24 50µs/DIV 100µs/DIV L = 10µH L = 10µH L = 10µH VIN = 7V VIN = 7V VIN = 7V VOUT = 5V VOUT = 5V VOUT = 5V IOUT = 200mA IOUT = 5mA IOUT = 5mA COUT = 10µF COUT = 22µF COUT = 22µF (WITH THE RECOMMENDED FEEDFORWARD CAPACITOR)
Step Load Transient Response in Step Load Transient Response in Start-Up Waveforms Fixed Frequency Burst Mode Operation
VOUT 5V/DIV VOUT VOUT V 100mV/DIV 100mV/DIV CC 5V/DIV RUN 5V/DIV I I VOUT VIN 100mA/DIV IVOUT 200mA/DIV 100mA/DIV 3129 G25 1ms/DIV 3129 G26 500µs/DIV 3129 G27 500µs/DIV VIN = 7V L = 10µH L = 10µH VOUT = 5V VIN = 7V VIN = 7V IOUT = 50mA VOUT = 5V VOUT = 5V COUT = 22µF COUT = 10µF COUT = 22µF (WITH THE RECOMMENDED IOUT = 50mA to 150mA STEP FEEDFORWARD CAPACITOR) IOUT = 5mA to 125mA STEP
PGOOD Response to a Drop On VOUT MPPC Response to a Step Load
VOUT PGOOD 2V/DIV 2V/DIV VIN 2V/DIV VOUT 2V/DIV IVOUT 100mA/DIV 3129 G28 1ms/DIV 3129 G29 2ms/DIV VOUT = 5V VIN = 5VOC VMPPC SET TO 3.5V CIN = 22µF, RIN = 10Ω, VOUT = 5V, COUT = 22µF IOUT = 25mA to 125mA STEP 3129fc For more information www.linear.com/LTC3129 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts