LT1175IN8 Linear Technology, LT1175IN8 Datasheet - Page 7

• Manufacturer Part Number: LT1175IN8
• Description: IC LDO REG ADJST NEG 500MA 8-DIP
• Manufacturer: Linear Technology

Specifications of LT1175IN8

• Regulator Topology: Negative Adjustable
• Voltage - Output: -3.8 ~ -19.9 V
• Voltage - Input: -4.3 ~ -20 V
• Voltage - Dropout (typical): 0.5V @ 500mA
• Number Of Regulators: 1
• Current - Output: 500mA
• Current - Limit (min): Adjustable
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TYPICAL PERFORMANCE CHARACTERISTICS
25
20
15
10
5
0
0
Shutdown Input Current
5
INPUT VOLTAGE (V)
T
J
= 125°C
20
16
12
10
8
4
0
0
GND Pin Current
TRANSISTOR
IN DROPOUT
0.1
15
T
J
T
T
J
= –55°C
POWER
J
= 25°C
T
= –55°C
0.2
OUTPUT CURRENT (A)
J
= 25°C
20
0.3
1175 G07
V
IN
25
0.4
T
– V
J
= 25°C
OUT
V
T
IN
J
0.5
= 25°C
= 2V
– V
2.5
2.0
1.5
1.0
0.5
OUT
0.6
0
–50
1175 G10
≥ 3V
Shutdown Thresholds
DEVICE IS OFF
BELOW THRESHOLD
0.7
NEGATIVE THRESHOLD
–25
0
TEMPERATURE (°C)
POSITIVE THRESHOLD
25
50
100
75
80
60
40
20
RIPPLE REJECTION IS RELATIVELY INDEPENDENT OF
INPUT VOLTAGE AND LOAD FOR CURRENTS BETWEEN
25mA AND 500mA. LARGER OUTPUT CAPACITORS DO
NOT IMPROVE REJECTION FOR FREQUENCIES BELOW
50kHz. AT VERY LIGHT LOADS, REJECTION WILL
IMPROVE WITH LARGER OUTPUT CAPACITORS
0
10
Ripple Rejection
100
I
V
C
(ADJUSTABLE)
OUT
IN
OUT
1175 G08
V
– V
= 100mA
OUT
= 1μF TANT
100
125
OUT
= 12V
= 2V
FREQUENCY (Hz)
1k
V
(ADJUSTABLE)
WITH 0.1μF ACROSS
DIVIDER RESISTOR
–10
OUT
15
10
–5
5
0
–25 –20
= 12V
SHDN Pin Characteristics
10k
V
CHARACTERISTICS DO NOT
CHANGE SIGNIFICANTLY WITH
TEMPERATURE, SO A SINGLE
CURVE IS SHOWN. POSITIVE
CURRENT FLOWS INTO
SHDN PIN
IN
SHUTDOWN TO GROUND VOLTAGE (V)
V
(FIXED)
= 25V
IF SHDN PIN IS NEGATIVE WITH
RESPECT TO INPUT VOLTAGE AND
INPUT VOLTAGE IS LESS THAN 15V,
NEGATIVE BREAKOVER POINT WILL
BE ABOUT 8V BELOW –V
OUT
–15
100k
= 5V
–10
–5
1M
1175 G11
0
5
LT1175
IN
10
15
20
1175 G09
1175ff
7
25