Datasheet LTC3527, LTC3527-1 (Analog Devices) - 6

LTC3527/LTC3527-1
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise noted) Current Limit vs Temperature Feedback Voltage vs Temperature Start-Up Voltage vs Temperature
1.30 1.205 0.75 CONVERTER1 1.20 0.70 1.10 1.200 VIN = 1.2V 0.65 1.00 VOUT = 3.3V 0.90 1.195 0.60 0.80 VOLTAGE (V) FB VOLTAGE (V) CURRENT LIMIT (A) 0.55 0.70 1.190 CONVERTER2 0.50 0.60 0.50 1.185 0.45 –45 –30 –15 0 15 30 45 60 75 90 –55 –35 –15 5 25 45 65 85 105 125 –50 –30 –10 10 30 50 70 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 35271 G17 35271 G18 35271 G19
Burst Mode Quiescent Current RDS(ON) (NMOS and PMOS) RDS(ON) (NMOS and PMOS) vs VOUT vs VOUT Change vs Temperature
16 0.90 VIN = 1.2V PMOS2 0.70 15 0.80 PMOS2 14 0.70 0.60 (Ω) NMOS2 (Ω) (μA) 13 0.60 NMOS2 I Q 0.50 DS(ON) DS(ON) R R 12 0.50 PMOS1 NMOS1 PMOS1 0.40 11 0.40 NMOS1 10 0.30 0.30 1.5 2 2.5 3 3.5 4 4.5 5 1.5 2 2.5 3 3.5 4 4.5 5 –45 –30 –15 0 15 30 45 60 75 90 VOUT (V) VOUT (V) TEMPERATURE (°C) 35271 G20 35271 G21 35271 G22
Fixed Frequency Switching Waveform and VOUT Ripple Burst Mode Waveforms
SW1 PIN SW1 PIN 2V/DIV 2V/DIV VOUT1 50mV/DIV AC-COUPLED VOUT1 10mV/DIV AC-COUPLED INDUCTOR CURRENT 200mA/DIV 35271 G23 35271 G24 500μs/DIV 10μs/DIV VIN1 = 1.2V VIN1 = 1.2V VOUT1 = 3.3V AT 100mA VOUT1 = 3.3V COUT1 = 10μF COUT1 = 10μF 35271fc 6