LT1185 查看數據表（PDF） - Linear Technology
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LT1185 Datasheet PDF : 16 Pages
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LT1185
TYPICAL PERFOR A CE CHARACTERISTICS
Internal Current Limit
5
4
GUARANTEED
LIMIT
3
TYPICAL
2
1
GUARANTEED
LIMIT
TEST POINTS
0
0
5 10 15 20 25 30
INPUT-OUTPUT DIFFERENTIAL (V)
LT1185 • TPC01
Quiescent Ground Pin Current*
12
ILOAD = 0
10 TJ = 25°C
8
*DOES NOT INCLUDE REF CURRENT
OR OUTPUT DIVIDER CURRENT
6
4
VOUT = 5V
2
0
05
10 15 20 25 30 35
INPUT VOLTAGE (V)
LT1185 • TPC02
Feedback Pin Voltage
Temperature Drift
2.41
2.40
2.39
2.38
2.37
2.36
2.35
2.34
2.33
–50 –25 0 25 50 75 100 125 150
JUNCTION TEMPERATURE (°C)
LT1185 • TPC03
Ground Pin Current
160
TJ = 25°C
140
120
100
80
REGULATOR JUST AT
DROPOUT POINT
60
40
VIN – VOUT = 5V
20
0
0
1
2
3
4
LOAD CURRENT (A)
LT1185 • TPC04
Ripple Rejection vs Frequency
–100
–80
ALL OUTPUT
VOLTAGES
–60
WITH 0.05µF
ACROSS R2
–40
VOUT = 5V
VIN – VOUT = 1.5V
–20
0
100
1k
10k
100k
1M
FREQUENCY (Hz)
LT1185 • TPC05
Load Transient Response
COUT = 2.2µF, ESR = 1Ω
100mV
COUT = 2.2µF, ESR = 2Ω
VOUT = 5V
IOUT = 1A
∆ILOAD
0.1A tr,f ≤ 100ns
02 4
6 8 10
TIME (µs)
12 14 16
LT1185 • TPC06
Output Impedance
10
OUTPUT IMPEDANCE IS
SET BY OUTPUT CAPACITOR
ESR IN THIS REGION
1
0.1
0.01
0.001
1k
VOUT = 5V
IOUT = 1A
COUT = 2.2µF
10k
100k
1M
FREQUENCY (Hz)
LT1183 • TPC07
1185ff
4
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