Datasheet

LT1936
4
1936fd
INPUT VOLTAGE (V)
0
1.0
LOAD CURRENT (A)
1.2
1.4
1.6
1.8
10 2051525
1936 G04
30
V
OUT
= 5V
L = 15μH
L = 10μH
INPUT VOLTAGE (V)
0
1.0
LOAD CURRENT (A)
1.2
1.4
1.6
1.8
10 2051525
1936 G05
30
V
OUT
= 3.3V
L = 6.8μH
L = 10μH
SWITCH CURRENT (A)
0
0
SWITCH VOLTAGE DROP (mV)
100
200
300
400
600
0.5 1.0
1936 G06
1.5
500
T
A
= –45°C
T
A
= 85°C
T
A
= 25°C
TEMPERATURE (°C)
1.185
FEEDBACK VOLTAGE (V)
1.195
1.210
1936 G07
1.190
1.205
1.200
–50 –25 0 25 50 75 100 150125
TEMPERATURE (°C)
–50
3.0
UVLO (V)
3.2
3.4
3.6
3.8
–25 0 25 50
1936 G08
75 100 150125
TEMPERATURE (°C)
–50
400
SWITCHING FREQUENCY (kHz)
450
500
550
600
–25 0 25 50
1936 G09
75 100 150125
FB PIN VOLTAGE (V)
0
700
T
A
= 25°C
600
500
400
300
200
100
0
1936 G10
0.5 1.0 1.5
SWITCHING FREQUENCY (kHz)
SHDN PIN VOLTAGE (V)
0
0
SWITCH CURRENT LIMIT (A)
0.5
1.0
1.5
2.0
2.5
3.0
T
A
= 25°C
DC = 30%
12 34
1936 G11
SHDN PIN VOLTAGE (V)
0
0
SHDN PIN CURRENT (μA)
50
100
150
200
48
1936 G12
12 16
T
A
= 25°C
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Load Current Maximum Load Current Switch Voltage Drop
Feedback Voltage Undervoltage Lockout Switching Frequency
Frequency Foldback Soft-Start SHDN Pin Current