Datasheet LT1936 (Analog Devices) - 5

LT1936
TYPICAL PERFORMANCE CHARACTERISTICS Minimum Input Voltage Minimum Input Voltage Switch Current Limit
7.0 5.0 3.0 VOUT = 5V VOUT = 3.3V TA = 25°C TA = 25°C 6.5 L = 15μH L = 10μH 2.5 4.5 6.0 2.0 5.5 4.0 1.5 5.0 1.0 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3.5 SWITCH CURRENT LIMIT (A) 4.5 0.5 4.0 3.0 0 1 10 100 1000 1 10 100 1000 –50 –25 0 25 50 75 100 125 150 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (°C) 1936 G13 1936 G14 1936 G15
Switching Waveforms, Switching Waveforms Discontinuous Mode
VSW VSW 10V/DIV 10V/DIV IL IL 500mA/DIV 500mA/DIV VOUT VOUT 20mV/DIV 20mV/DIV V 1μs/DIV 1936 G16 1936 G17 IN = 12V V 1μs/DIV IN = 12V VOUT = 3.3V VOUT = 3.3V IOUT = 1A IOUT = 50mA L = 10μH L = 10μH COUT = 22μF COUT = 22μF
VC Voltages Error Amp Output Current
2.5 60 TA = 25°C VC = 0.5V 40 2.0 CURRENT LIMIT CLAMP 20 1.5 0 VOLTAGE (V) 1.0 CV SWITCHING THRESHOLD PIN CURRENT (μA) C –20 V 0.5 –40 0 –60 –50 –25 0 25 50 75 100 125 150 0 1 2 TEMPERATURE (°C) FB PIN VOLTAGE (V) 1936 G18 1936 G19 1936fd 5