Datasheet LTC3459 (Analog Devices) - 5

LTC3459
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise noted). VOUT AC Ripple Burst Cycle Burst Cycle
VOUT 50mV/DIV SW SW CURRENT CURRENT 50mA/DIV 50mA/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 50mA/DIV 50mA/DIV 50mA/DIV VIN = 3.3V 5μs/DIV 3459 G10 VIN = 5V 1μs/DIV 3459 G11 VIN = 2V 1μs/DIV 3459 G12 VOUT = 5V VOUT = 10V VOUT = 10V L = 22μH L = 22μH L = 22μH COUT = 4.7μF CFF = 47pF
VOUT Regulated Below VIN Burst Cycle Shorted Output Start-Up
VOUT VOLTAGE SW SW 50mA/DIV CURRENT CURRENT 50mA/DIV 50mA/DIV INDUCTOR INDUCTOR CURRENT INPUT CURRENT 50mA/DIV CURRENT 50mA/DIV 50mA/DIV VIN = 5V 1μs/DIV 3459 G13 VIN = 5V 500ns/DIV 3459 G14 VIN = 3.6V 250μs/DIV 3459 G15 VOUT = 3.5V VOUT = 0V VOUT = 0V TO 8V L = 22μH L = 22μH L = 22μH CIN = 2.2μF
Load Steps Load Steps
VOUT VOUT AC RIPPLE AC RIPPLE 50mV/DIV 50mV/DIV WITH 50kΩ WITH 5kΩ (TRACE 2 (TRACE 2 GROUNDED) GROUNDED) TO 500Ω TO 500Ω (TRACE 2 = 5V) (TRACE 2 = 5V) VIN = 3.6V 100μs/DIV 3459 G16 VIN = 3.6V 100μs/DIV 3459 G17 VOUT = 8V VOUT = 8V L = 22μH L = 22μH COUT = 4.7μF COUT = 4.7μF CFF = 47pF CFF = 47pF 3459fc 5