LT1936 Linear Technology, LT1936 Datasheet - Page 4

• Manufacturer Part Number: LT1936
• Description: 1.4A 500kHz Step-Down Switching Regulator
• Manufacturer: Linear Technology

LT1936
TYPICAL PERFORMANCE CHARACTERISTICS
4
1.200
1.185
1.210
1.205
1.195
1.190
700
600
500
400
300
200
100
1.2
1.8
1.6
1.4
1.0
0
–50 –25
0
Maximum Load Current
0
Feedback Voltage
Frequency Foldback
T
V
A
OUT
= 25°C
= 5V
5
0
L = 15μH
TEMPERATURE (°C)
FB PIN VOLTAGE (V)
INPUT VOLTAGE (V)
0.5
10
25
50
15
L = 10μH
75
1.0
20
100
25
125
1936 G07
1936 G10
1936 G04
150
1.5
30
1.6
1.2
1.0
3.8
3.6
3.4
3.2
3.0
1.8
1.4
3.0
2.5
2.0
1.5
1.0
0.5
0
–50
0
Maximum Load Current
Undervoltage Lockout
Soft-Start
0
V
T
DC = 30%
A
OUT
–25
= 25°C
= 3.3V
5
L = 10μH
0
1
SHDN PIN VOLTAGE (V)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
10
25
L = 6.8μH
50
15
2
75
20
100
3
25
125
1936 G08
1936 G05
1936 G11
150
30
4
150
200
100
600
500
100
600
550
500
450
400
400
300
200
50
0
0
–50
0
0
Switch Voltage Drop
Switching Frequency
SHDN Pin Current
T
A
= 25°C
–25
4
0
SHDN PIN VOLTAGE (V)
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SWITCH CURRENT (A)
TEMPERATURE (°C)
0.5
25
T
A
= 25°C
50
8
T
A
75
1.0
= 85°C
100
12
T
A
= –45°C
125
1936 G12
1936 G06
1936 G09
1936fd
150
1.5
16