lt1913 Linear Technology Corporation, lt1913 Datasheet - Page 5

• Manufacturer Part Number: lt1913
• Description: 25v, 3.5a, 2.4mhz Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR A CE CHARACTERISTICS
840
820
800
780
760
140
120
100
1.4
1.2
1.0
0.8
0.6
0.4
0.2
80
60
40
20
0
0
–50
–50
0
Minimum Switch On-Time
Boost Diode
Feedback Voltage
–25
–25
BOOST DIODE CURRENT (A)
0.5
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
50
1.0
50
75
75
100
W
100
1.5
125
125
1913 G12
1913 G18
1913 G15
U
150
150
2.0
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
–10
–20
–30
–40
–50
50
40
30
20
10
7
6
5
4
3
2
1
0
0
–200
–50
Soft-Start
0
Error Amp Output Current
Switching Frequency
R
T
–25
0.5
= 34.0k
FB PIN ERROR VOLTAGE (mV)
–100
RUN/SS PIN VOLTAGE (V)
0
1
TEMPERATURE (°C)
25
1.5
50
0
2
75
2.5
100
100
125
3
1913 G19
1913 G16
T
1913 G13
A
3.5
150
200
= 25°C unless otherwise noted.
1200
1000
800
600
400
200
12
10
5.0
4.5
4.0
3.5
3.0
2.5
2.0
0
8
6
4
2
0
0
RUN/SS Pin Current
Frequency Foldback
0
Minimum Input Voltage
1
V
T
L = 4.7μH
f = 600kHz
R
OUT
A
T
100
= 25°C
= 34.0k
= 3.3V
5
200
RUN/SS PIN VOLTAGE (V)
10
FB PIN VOLTAGE (mV)
LOAD CURRENT (mA)
300
10
400
100
500
15
LT1913
600
1000
700
20
800
1913 G17
1913 G14
1913 G20
5
1913f
10000
900
25