Datasheet

4
LT1185
1185ff
Ripple Rejection vs Frequency
Ground Pin Current
INPUT-OUTPUT DIFFERENTIAL (V)
0
0
OUTPUT CURRNT (A)
1
2
3
5
10
15 20
LT1185 • TPC01
25
4
5
30
TYPICAL
TEST POINTS
GUARANTEED
LIMIT
GUARANTEED
LIMIT
Internal Current Limit
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
8
10
12
15 25
LT1185 • TPC02
6
4
510
20 30 35
2
0
V
OUT
= 5V
*DOES NOT INCLUDE REF CURRENT
OR OUTPUT DIVIDER CURRENT
I
LOAD
= 0
T
J
= 25°C
Quiescent Ground Pin Current*
JUNCTION TEMPERATURE (°C)
–50
VOLTAGE (V)
2.37
2.38
2.39
150
LT1185 • TPC03
2.36
2.35
2.33
0
50
100
2.34
2.41
2.40
–25
25
75
125
Feedback Pin Voltage
Temperature Drift
LOAD CURRENT (A)
0
CURRENT (mA)
80
100
120
4
LT1185 • TPC04
60
40
0
1
2
3
20
160
140
T
J
= 25°C
REGULATOR JUST AT
DROPOUT POINT
V
IN
– V
OUT
= 5V
FREQUENCY (Hz)
–20
RATIO V
OUT
/V
IN
(dB)
–40
–60
–80
–100
100 10k 100k 1M
LT1185 • TPC05
0
1k
ALL OUTPUT
VOLTAGES
WITH 0.05µF
ACROSS R2
V
OUT
= 5V
V
IN
– V
OUT
= 1.5V
Load Transient Response
TIME (µs)
0
4
8
10
LT1185 • TPC06
26
12
14
16
0.1A t
r
,
f
≤ 100ns
C
OUT
= 2.2µF, ESR = 1Ω
C
OUT
= 2.2µF, ESR = 2Ω
V
OUT
= 5V
I
OUT
= 1A
100mV
∆I
LOAD
Output Impedance
FREQUENCY (Hz)
0.01
IMPEDANCE (Ω)
0.1
1
10
1M10k 100k
LT1183 • TPC07
0.001
1k
OUTPUT IMPEDANCE IS
SET BY OUTPUT CAPACITOR
ESR IN THIS REGION
V
OUT
= 5V
I
OUT
= 1A
C
OUT
= 2.2µF
TYPICAL PERFOR A CE CHARACTERISTICS
UW