Datasheet

3
LT1935
1935f
1.28
1.27
1.26
1.25
1.24
1935 G01
V
FB
(V)
TEMPERATURE (°C)
–50
FREQUENCY (MHz)
100
1935 G02
050
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–25 25 75 125
TEMPERATURE (°C)
–50 100
050–25 25 75 125
TEMPERATURE (°C)
–50
UVLO (V)
2.4
2.3
2.2
2.1
2.0
1.9
1.8
25 75
1935 G03
–25 0
50 100 125
DUTY CYCLE (%)
0
CURRENT LIMIT (A)
2
3
80
1935 G04
1
0
20
40
60
100
4
SWITCH CURRENT (A)
0
SWITCH SATURATION VOLTAGE (mV)
400
300
200
100
0
0.5 1.0 1.5 2.0
1935 G05
2.5 3.0
SHDN VOLTAGE (V)
0
CURRENT LIMIT (A)
2
3
2.0
1935 G06
1
0
0.5
1.0
1.5
4
SHDN PIN VOLTAGE (V)
2
SHDN PIN CURRENT (µA)
0
1935 G07
6
10
14
80
60
40
20
0
4812
16
FEEDBACK VOLTAGE (V)
0
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0.6 1.0
1935 G08
0.2 0.4
0.8 1.2 1.4
SWITCHING FREQUENCY (MHz)
T
A
= 25°C
T
A
= 25°C T
A
= 25°C
T
A
= 25°C
T
A
= 85°C
50% DUTY CYCLE
T
A
= 25°C
TYP
MIN
TYPICAL PERFOR A CE CHARACTERISTICS
UW
FB Pin Voltage
Oscillator Frequency
Undervoltage Lockout
Current Limit
Switch Saturation Voltage
Peak Switch Current vs SHDN Pin
Voltage (Soft-Start)
SHDN Pin Current
Frequency Foldback
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