LT1120AIS8 Linear Technology, LT1120AIS8 Datasheet

IC REG W/COMPARATOR&SHTDWN 8SOIC

LT1120AIS8

Manufacturer Part Number
LT1120AIS8
Description
IC REG W/COMPARATOR&SHTDWN 8SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LT1120AIS8

Regulator Topology
Positive Adjustable
Voltage - Output
2.5 ~ 35.15 V
Voltage - Input
4.5 ~ 36 V
Voltage - Dropout (typical)
0.4V @ 125mA
Number Of Regulators
1
Current - Output
125mA (Min)
Operating Temperature
-40°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1120AIS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
LT1120AIS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1120AIS8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1120AIS8#TRPBF
Manufacturer:
IXYS
Quantity:
991
Part Number:
LT1120AIS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
V
I
20 A Supply Current
125mA Output Current
2.5V Reference
Reference Output Sources 4mA and Sinks 4mA
Open Collector Comparator Sinks 10mA
Logic Shutdown
0.2V Dropout Voltage
Thermal Limiting
8-Lead SO Package
Battery Systems
Battery Backup System
Portable Terminals
Portable Instruments
Memory Keep Alive
Q
IN
= 20 A
> 5.2V
10 F
+
5
SHUTDOWN
V
IN
U
3
LT1120A
5V Regulator
GND
V
1
OUT
FB
4
2
U
0.001 F
1M
1M
+
1120A TA01
25 F
5V
DESCRIPTIO
The LT
regulator and free collector comparator on a single mono-
lithic chip. With only 20 A 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 cur-
rents. 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.
Comparator and Shutdown
, LTC and LT are registered trademarks of Linear Technology Corporation.
Micropower Regulator with
®
1120A is a combination micropower positive
1.00
0.10
0.01
Dropout Voltage and Supply Current
0.1
U
1
OUTPUT CURRENT (mA)
10
100
1120A TA02
1000
LT1120A
10
1
0.1
1120afa
1

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LT1120AIS8 Summary of contents

Page 1

... 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. , LTC and LT are registered trademarks of Linear Technology Corporation. 1.00 5V 0.001 F 1M ...

Page 2

... R = 20k L 36V S = 1mA U W INFORMATION ORDER PART TOP VIEW NUMBER –INPUT 1 8 LT1120ACN8 COMP OUT 2 7 LT1120ACS8 REF 3 6 LT1120AIS8 PART S8 PACKAGE MARKING 8-LEAD PLASTIC SO = 110 C, = 130 C/W (N) 1120A JA = 110 C, = 190 C/W (S) JA 1120AI MIN TYP MAX 2.46 2.50 2.54 ...

Page 3

ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range of T PARAMETER CONDITIONS Reference Reference Voltage 4.5V V Line Regulation 4.5V V Load Regulation –2.0mA I Output Source Current Output Sink ...

Page 4

LT1 120A W U TYPICAL PERFOR A CE CHARACTERISTICS Dropout Voltage 100mV OUT 0.1 0.01 0 100 1000 REGULATOR OUTPUT CURRENT (mA) 1120A G04 Supply Current 100mA OUT 10mA ...

Page 5

CTIO S GND (Pin 1): Ground FEEDBACK (Pin 2): This is the feedback point of the regulator. When operating nominally at 2.5V. Optimum source resistance is 200k to 500k. The feedback pin should ...

Page 6

LT1 120A U U APPLICATIONS INFORMATION Reference Internal to the LT1120A is a 2.5V trimmed class B output reference. The reference was designed to be able to source or sink current so it could be used in supply splitting applications ...

Page 7

... V IN Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. Regulator with Output Voltage Monitor ...

Page 8

... Response, LDO LT1964 200mA, Low Noise Micropower Negative, LDO LT3010 80V, 50mA, Low Noise Linear Regulator ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 8 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 U N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) ...

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