LT1076_15 Datasheet, PDF (6/16 Pages) Linear Technology – Step-Down Switching Regulator

LT1074/LT1076
TYPICAL PERFOR A CE CHARACTERISTICS
V_C Pin Characteristics
200
150
100
V_FB ADJUSTED FOR
IC = 0 AT VC = 2V
50
0
–50
–100
–150
SLOPE ≈ 400kΩ
V_FB ≤ 2V
–200
01 2 3 4 5 6 7 8 9
VOLTAGE (V)
LT1074•TPC01
Shutdown Pin Characteristics
40
30
20
10
V_IN = 50V
THIS POINT MOVES
0
WITH V_IN
–10
–20
–30
–40
0
DETAILS OF THIS
AREA SHOWN IN
OTHER GRAPH
10 20 30 40 50
VOLTAGE (V)
60 70 80
LT1074•TPC04
6
V_C Pin Characteristics
2.0
1.5
1.0
V_FB ≥ 2.5V
0.5
0
–0.5
–1.0
–1.5
–2.0
01 2 3 4 5 6 7 8 9
VOLTAGE (V)
LT1074•TPC02
Shutdown Pin Characteristics
0
–5
T_j = 25°C
CURRENT FLOWS OUT
–10
OF SHUTDOWN PIN
–15
SHUTDOWN
–20
THRESHOLD
–25
–30
–35
–40
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
VOLTAGE (V)
LT1074•PC05
Supply Current
20
18
16
14
DEVICE NOT SWITCHING
12
V_C = 1V
10
8
6
4
2
0
0 10 20 30 40
INPUT VOLTAGE (V)
50 60
LT1074•TPC11
Feedback Pin Characteristics
500
400
300
200
START OF
100
FREQUENCY SHIFTING
0
–100
–200
–300
–400
–500
0 1 2 3 4 5 6 7 8 9 10
VOLTAGE (V)
LT1074•TPC03
I_LIM Pin Characteristics
100
50
0
–50
T_j = 25°C
–100
–150
–200
–250
–300
–350
–400
–2 –1 0 1 2 3 4 5 6 7 8
VOLTAGE (V)
LT1074•TPC06
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