Datasheet LTC3429, LTC3429B (Analog Devices) - 4

LTC3429/LTC3429B
W U TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25
°
C unless otherwise specified) Normalized Oscillator Frequency Burst Mode Quiescent Current Output Voltage vs Temperature vs Temperature vs Temperature (LTC3429 Only)
3.44 1.02 40 VIN = 1.5V I 3.40 OUT = 30mA 35 1.00 VOUT = 5V A) 30 3.36 µ 0.98 25 3.32 (V) VOUT = 3.3V 20 OUTV 3.28 0.96 15 3.24 NORMALIZED FREQUECY QUIESCENT CURRENT ( 10 0.94 3.20 5 3.16 0.92 0 –60 –40 –29 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3429 G10 3429 G11 3429 G12
SW Pin Fixed Frequency SW Pin Discontinuous Mode Fixed Frequency and Burst Mode Continuous Mode Operation Antiringing Operation Operation (LTC3429 Only)
V VOUT SW VSW 1V/DIV 1V/DIV 100mV/DIV AC-COUPLED 50mA IOUT 120µA 3429 G13 3429 G14 3429 G15 VIN = 1.5V 200ns/DIV VIN = 1.5V 200ns/DIV VIN = 1.5V 5ms/DIV VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V IOUT = 50mA IOUT = 20mA IOUT = 120µA TO 50mA STEP L = 10µH L = 10µH L = 10µH COUT = 10µF COUT = 10µF COUT = 10µF CPL = 150pF CPL = 150pF CPL = 150pF
Output Voltage Transient Inrush Current Control Inrush Current Control Response and Soft-Start and Soft-Start
VOUT VOUT 1V/DIV 2V/DIV VOUT 100mV/DIV AC-COUPLED INDUCTOR 90mA CURRENT INDUCTOR I CURRENT OUT 100mA/DIV 40mA 200mA/DIV 3429 G16 V 3429 G17 3429 G18 IN = 1.5V 100µs/DIV VIN = 1.5V 500µs/DIV VIN = 2.5V 2ms/DIV VOUT = 3.3V VOUT = 3.3V VOUT = 5V IOUT = 40mA TO 90mA STEP IOUT = 10mA IOUT = 50mA L = 10µH L = 4.7µH L = 4.7µH COUT = 10µF COUT = 10µF COUT = 10µF CPL = 150pF CPL = 100pF CPL = 100pF 3429fa 4