Datasheet LTC3537 (Analog Devices) - 7

LTC3537
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Fixed Frequency Switching Waveform and VOUTB Ripple Burst Mode Waveforms VOUTB and IINB During Soft-Start
ENBST VOUTB 20mV/DIV SW 2V/DIV VOUTB 2V/DIV VOUTB IL 20mV/ 10mA/DIV DIV IVINB 200mA/ DIV 3537 G19 3537 G21 200ns/DIV V 3537 G20 V V INB = 2.4V 10μs/DIV INB = 1.2V 100μs/DIV INB = 2.4V V V V OUTB = 3.3V OUTB = 3.3V OUTB = 3.3V C C C OUTB = 10μF OUTB = 4.7μF OUTB = 4.7μF ILOAD = 10mA
Load Current Step Response Load Current Step Response Load Current Step Response (from Burst Mode Operation) (Fixed Frequency) (Fixed Frequency)
V V OUTB VOUTB OUTB 100mV/ 100mV/ 100mV/ DIV DIV DIV I I LOAD LOAD ILOAD 100mA/ 100mA/ 100mA/ DIV DIV DIV 3537 G24 V 3537 G22 3537 G23 100μs/DIV INB = 2.4V 100μs/DIV VINB = 2.4V 100μs/DIV VINB = 3.6V V V OUTB = 3.3V VOUTB = 3.3V OUTB = 5V C C OUTB = 4.7μF COUTB = 4.7μF OUTB = 4.7μF
Load Current Step Response LDO Dropout Voltage vs LDO Input Ripple Rejection vs (from Burst Mode Operation) Load Current Frequency
140 60 VINL = 3.3V 120 VOLDO = 3V 50 COLDO = 4.7μF ILOAD = 50mA 100 VOUTB 40 100mV/ DIV TAGE (mV) 80 TIOIN (dB) 30 60 ILOAD TTENUA A 20 100mA/ 40 DROPOUT VOL DIV 20 10 0 0 V 3537 G25 INB = 3.6V 100μs/DIV 0 10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 VOUTB = 5V LOAD CURRENT (mA) FREQUENCY (kHz) C 3537 G26 OUTB = 4.7μF 3537 G29 3537fd 7