LT1912 Linear Technology Corporation, LT1912 Datasheet - Page 5

• Manufacturer Part Number: LT1912
• Description: Step-Down Switching Regulator
• Manufacturer: Linear Technology Corporation

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TYPICAL PERFOR A CE CHARACTERISTICS
840
820
800
780
760
140
120
100
80
60
40
20
0
–50
–50
Feedback Voltage
Minimum Switch On-Time
–25
–25
0
0
TEMPERATURE (°C)
TEMPERATURE (˚C)
25
25
1.4
1.2
1.0
0.8
0.6
0.4
0.2
50
50
0
0
Boost Diode
75
75
W
100
100
BOOST DIODE CURRENT (A)
0.5
125
125
1912 G09
1912 G12
U
150
150
1.0
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1.5
–50
0
Switching Frequency
Soft-Start
–25
0.5
1912 G15
2.0
RUN/SS PIN VOLTAGE (V)
0
1
TEMPERATURE (°C)
25
1.5
50
2
–10
–20
–30
–40
–50
75
50
40
30
20
10
0
–200
2.5
Error Amp Output Current
100
125
3
T
1912 G13
1912 G10
–100
FB PIN ERROR VOLTAGE (V)
A
150
3.5
= 25°C unless otherwise noted.
0
1.2
1.0
0.6
0.4
0.8
0.2
12
10
0
6
4
2
0
8
Frequency Foldback
0
0
RUN/SS Pin Current
100
100
5
200
RUN/SS PIN VOLTAGE (V)
1912 G16
10
FB PIN VOLTAGE (mV)
300
200
15
400
500
20
LT1912
600
25
700
30
800
1912 G11
1912 G14
5
1912f
900
35