LT1185CQ#TR Linear Technology, LT1185CQ#TR Datasheet - Page 4

• Manufacturer Part Number: LT1185CQ#TR
• Description: IC REG LDO ADJUSTABLE 3A DDPAK-5
• Manufacturer: Linear Technology

Specifications of LT1185CQ#TR

• Regulator Topology: Negative Adjustable
• Voltage - Output: -2.5 ~ -25 V
• Voltage - Input: -4.2 ~ -35 V
• Voltage - Dropout (typical): 0.67V @ 3A
• Number Of Regulators: 1
• Current - Output: 3A
• Current - Limit (min): Adjustable
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-5, D²Pak (5 leads + Tab), TO-263BA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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