Datasheet

LT1936
5
1936fd
LOAD CURRENT (mA)
1
4.0
INPUT VOLTAGE (V)
4.5
5.0
5.5
6.0
6.5
7.0
10 100 1000
1936 G13
V
OUT
= 5V
T
A
= 25°C
L = 15μH
LOAD CURRENT (mA)
1
3.0
INPUT VOLTAGE (V)
3.5
4.0
4.5
5.0
10 100 1000
1936 G14
V
OUT
= 3.3V
T
A
= 25°C
L = 10μH
TEMPERATURE (°C)
–50
SWITCH CURRENT LIMIT (A)
2.0
2.5
3.0
25 75
1936 G15
1.5
1.0
–25 0 50 100 150125
0.5
0
V
SW
10V/DIV
I
L
500mA/DIV
V
OUT
20mV/DIV
1μs/DIVV
IN
= 12V
V
OUT
= 3.3V
I
OUT
= 1A
L = 10μH
C
OUT
= 22μF
1936 G16
V
SW
10V/DIV
I
L
500mA/DIV
V
OUT
20mV/DIV
1μs/DIVV
IN
= 12V
V
OUT
= 3.3V
I
OUT
= 50mA
L = 10μH
C
OUT
= 22μF
1936 G17
TEMPERATURE (°C)
–50 –25
0
0.5
V
C
VOLTAGE (V)
1.5
05075
1936 G18
1.0
2.5
2.0
25 100 150125
CURRENT LIMIT CLAMP
SWITCHING THRESHOLD
FB PIN VOLTAGE (V)
0
–60
V
C
PIN CURRENT (μA)
–40
–20
0
20
60
1
1936 G19
2
40
T
A
= 25°C
V
C
= 0.5V
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Input Voltage Minimum Input Voltage Switch Current Limit
Switching Waveforms
Switching Waveforms,
Discontinuous Mode
V
C
Voltages Error Amp Output Current