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LT1120ACS8#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P14
LT1120A
1
1120afb
For more information www.linear.com/LT1120A
Typical applicaTion
FeaTures DescripTion
Micropower Regulator with
Comparator and Shutdown
The LT
®
1120A is a combination micropower positive regu-
lator and free collector comparator on a single monolithic
chip. With only 20µA supply current, the LT1120A can
supply over 125mA of output current. Input voltage range
is from 4.5V to 36V and dropout voltage is 0.6V at 125mA.
Dropout voltage decreases with lower load currents. Also
included on the chip is a class B output 2.5V reference
that can either source or sink current. This allows it to be
used as a supply splitter or auxiliary output. A shutdown
pin allows logic shutdown of the output.
The comparator can be used for system or battery moni
-
toring. For example, the comparator can be used to warn
of low system voltage. Frequency compensation of the
comparator for amplifier applications can be obtained by
adding external output capacitance.
5V Regulator Dropout Voltage and Supply Current
applicaTions
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Analog Devices, Inc. All other trademarks are the property of their
respective owners.
n
20µA Supply Current
n
125mA Output Current
n
2.5V Reference
n
Reference Output Sources 4mA and Sinks 4mA
n
Open Collector Comparator Sinks 10mA
n
Logic Shutdown
n
0.2V Dropout Voltage
n
Thermal Limiting
n
8-Lead SO Package
n
Battery Systems
n
Battery Backup System
n
Portable Terminals
n
Portable Instruments
n
Memory Keep Alive
1120A TA01a
V
IN
> 5.2V
I
Q
= 20µA
10µF
1M
SHUTDOWN
13
5 4
2
0.001µF
25µF
1M
5V
LT1120A
V
OUT
V
IN
GND
FB
+
+
OUTPUT CURRENT (mA)
0.1
0.01
DROPOUT VOLTAGE (V)
1.00
1 1000
1120A TA01b
10
0.10
100
0.1
SUPPLY CURRENT (mA)
10
1
LT1120A
2
1120afb
For more information www.linear.com/LT1120A
pin conFiguraTion
absoluTe MaxiMuM raTings
Input Voltage ............................................................. 36V
NPN Collector Voltage ............................................... 36V
Output Short-Circuit Duration .......................... Indefinite
Power Dissipation ............................... Internally Limited
(Note 1)
1
2
3
4
8
7
6
5
TOP VIEW
GND
FEEDBACK
SHUTDOWN
V
OUT
–INPUT
COMP OUT
REF
V
IN
N8 PACKAGE
8-LEAD PDIP
T
JMAX
= 110°C, θ
JA
= 130°C/W
1
2
3
4
8
7
6
5
TOP VIEW
–INPUT
COMP OUT
REF
V
IN
GND
FEEDBACK
SHUTDOWN
V
OUT
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 110°C, θ
JA
= 190°C/W
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1120ACN8#PBF LT1120ACN8#TRPBF 1120ACN8 8-Lead Plastic DIP 0°C to 100°C
LT1120ACS8#PBF LT1120ACS8#TRPBF 1120A 8-Lead Plastic SO 0°C to 100°C
LT1120AIS8#PBF LT1120AIS8#TRPBF 1120AI 8-Lead Plastic SO –40°C to 100°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
http://www.linear.com/product/LT1120A#orderinfo
Operating Temperature Range
LT1120AC
............................................... 0°C to 100°C
LT1120AI
............................................ –40°C to 100°C
Storage Temperature Range .................. –65°C to 150°C
LT1120A
3
1120afb
For more information www.linear.com/LT1120A
elecTrical characTerisTics
PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference
Reference Voltage 4.5V ≤ V
IN
≤ 36V 2.46 2.50 2.54 V
Line Regulation 4.5V ≤ V
IN
≤ 36V 0.01 0.015 %/V
Load Regulation –2.0mA ≤ I
REF
≤ 2mA, V
IN
= 12V 0.3 0.6 %
Output Source Current V
IN
= 5V 2 4 mA
Output Sink Current V
IN
= 5V 2 4 mA
Temperature Stability 1 %
Regulator
Supply Current V
IN
= 6V, I
OUT
≤ 100µA
V
IN
= 36V, I
OUT
≤ 100µA
V
IN
= 12V, I
OUT
= 125mA
20
30
11
25
40
20
µA
µA
mA
Output Current (V
IN
– V
OUT
) ≥ 1V, V
IN
≥ 6V 125 mA
Load Regulation (V
IN
– V
OUT
) ≥ 1V, V
IN
≥ 6V 0.2 0.5 %
Line Regulation 6V ≤ V
IN
≤ 36V 0.01 0.015 %/V
Dropout Voltage I
OUT
= 100µA
I
OUT
= 125mA
0.02
0.40
0.05
0.65
V
V
Feedback Sense Voltage V
IN
= 12V 2.44 2.5 2.56 V
Shutdown Pin Voltage
V
OUT
≤ 0.5V
Normal 0.4 V
Shutdown 2.2 1.4 V
Shutdown Pin Current V
IN
= 1.4V 10 µA
Feedback Bias Current 15 40 nA
Minimum Load Current V
IN
= 36V 1 5 µA
Short-Circuit Current V
IN
= 36V 250 400 mA
Comparator
Offset Voltage V
IN
= 36V 3 7 mV
Bias Current V
IN
= 36V 15 40 nA
Gain ∆V
OUT
= 29V, R
L
= 20k 2000 10000 V/V
Power Supply Rejection 4.5V ≤ V
S
≤ 36V 80 96 dB
Output Sink Current V
IN
= 4.5V 10 18 mA
Saturation Voltage I
OUT
= 1mA 0.4 0.6 V
Input Voltage Range 0 V
IN
– 1 V
Response Time 5 µs
Leakage Current V
IN
= 36V, V(Pin 7) = 36V 2 µA
T
J
= 25°C.
P1-P3P4-P6P7-P9P10-P12P13-P14

LT1120ACS8#TRPBF

Mfr. #:
Buy LT1120ACS8#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LDO Voltage Regulators Micropower Regulator with Comparator and Shutdown
Lifecycle:
New from this manufacturer.
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