LT1120ACN8#PBF

Manufacturer Part NumberLT1120ACN8#PBF
DescriptionIC REG W/COMPARATOR&SHTDWN 8-DIP
ManufacturerLinear Technology
LT1120ACN8#PBF datasheets

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Specifications of LT1120ACN8#PBF

Regulator TopologyPositive AdjustableVoltage - Output2.5 ~ 35.15 V
Voltage - Input4.5 ~ 36 VVoltage - Dropout (typical)0.4V @ 125mA
Number Of Regulators1Current - Output125mA (Min)
Operating Temperature0°C ~ 100°CMounting TypeThrough Hole
Package / Case8-DIP (0.300", 7.62mm)Lead Free Status / RoHS StatusLead free / RoHS Compliant
Current - Limit (min)-  
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FEATURES
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
U
APPLICATIO S
Battery Systems
Battery Backup System
Portable Terminals
Portable Instruments
Memory Keep Alive
U
TYPICAL APPLICATIO
5V Regulator
V
> 5.2V
5
4
V
V
IN
IN
OUT
I
= 20 A
Q
LT1120A
+
2
FB
GND
10 F
3
1
SHUTDOWN
Micropower Regulator with
Comparator and Shutdown
DESCRIPTIO
®
The LT
1120A is a combination micropower positive
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
1.00
5V
0.001 F
1M
+
25 F
1M
1120A TA01
LT1120A
U
Dropout Voltage and Supply Current
10
0.10
1
0.01
0.1
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
1120A TA02
1120afa
1

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LT1120ACN8#PBF 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

    LT1 120A ABSOLUTE MAXIMUM (Note 1) Input Voltage ........................................................... 36V NPN Collector Voltage ............................................. 36V Output Short-Circuit Duration .......................... Indefinite Power Dissipation ............................... Internally Limited Operating Temperature Range LT1120AC ............................................. 100 C LT1120AI ......................................... ...

  • 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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