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L7912CV on a board, in 3D

L7912CV

STMicroelectronics

0℃~+150℃@(Tj) 1 1.1V@(1A) 1.5A 12V 200uV 27V 3mA 60dB@(120Hz) Fixed Negative Over Temperature Protection、Short Circuit Protection TO-220 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS

Extended
DatasheetJLCPCBLCSCst/L7912CV
Category
Voltage Regulators Linear, Low Drop Out (LDO) Regulators
Package
TO-220
Pins
3

Overview

The L7912CV is a voltage Regulators Linear, Low Drop Out (LDO) Regulator made by STMicroelectronics in a TO-220 package with 3 pins. 0℃~+150℃@(Tj) 1 1.1V@(1A) 1.5A 12V 200uV 27V 3mA 60dB@(120Hz) Fixed Negative Over Temperature Protection、Short Circuit Protection TO-220 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS.

PCBKit's library has its KiCad symbol (Regulator_Linear:L7912, from KiCad's library) and its footprint (EasyEDA_Pro:to-220-3_l10.0-w4.5-p2.54-l, from EasyEDA Pro), ready for a KiCad board. 368 are in stock at JLCPCB (part C111886). 5 open-source boards in 4 repositories on GitHub use it.

Symbol

GND1VI2VO3
Regulator_Linear:L7912From KiCad's library

Footprint

123
EasyEDA_Pro:to-220-3_l10.0-w4.5-p2.54-lFrom EasyEDA Pro

From the datasheet

9
Supply, absolute maximum
35 V · VI, absolute maximum for VO = -12 V · p. 5
Junction, hottest
150 °C · max operating junction temperature · p. 5
Takes working
3 mA · max quiescent current, TJ = 25°C · p. 9
Gives
1.5 A · max rated output current with adequate heat sinking · p. 1
Current limit
1.5 A · typical short circuit current · p. 9
Output
12 V · typical output voltage, TJ = 25°C · p. 9
Dropout
1.1 V · typical dropout at IO = 1 A, TJ = 25°C, ΔVO = 100 mV · p. 9
Junction to case (TO-220)
5 K/W · junction-case thermal resistance · p. 5
Junction to air (TO-220)
50 K/W · junction-ambient thermal resistance · p. 5

What it is and has

4
Output current
up to 1.5 A · p. 1
Protection
Thermal overload protection · p. 1
Protection
Short circuit protection · p. 1
Protection
Output transition SOA protection · p. 1

Around it

1
diode 1N4001 or similar
between input and output; High current diode required if large capacitors are used, to protect against momentary input short circuit. · p. 11

Specifications

19
ParameterConditionsAs printedPage
DC input voltage VIfor VO = - 5 to - 18 V; L7912CVmax -35 V5
Storage temperature range TSTGmin -65 · max 150 °C5
Operating junction temperature range TOPmin 0 · max 150 °C5
Thermal resistance junction-case RthJCTO-220max 5 °C/W5
Thermal resistance junction-ambient RthJATO-220max 50 °C/W5
Output voltage VOTJ = 25°C; VI = -19 V, IO = 500 mA, CI = 2.2 uF, CO = 1 uFmin -11.5 · typ -12 · max -12.5 V9
Output voltage VOIO = -5 mA to -1 A, PO ≤ 15 W; VI = -15.5 to -27 V; TJ = 0 to 125 °C; CI = 2.2 uF, CO = 1 uFmin -11.4 · typ -12 · max -12.6 V9
Line regulation ΔVO(1)VI = -14.5 to -30 V, TJ = 25°C; IO = 500 mA, CI = 2.2 uF, CO = 1 uFmax 240 mV9
Line regulation ΔVO(1)VI = -16 to -22 V, TJ = 25°C; IO = 500 mA, CI = 2.2 uF, CO = 1 uFmax 120 mV9
Load regulation ΔVO(1)IO = 5 mA to 1.5 A, TJ = 25°C; VI = -19 V, CI = 2.2 uF, CO = 1 uFmax 240 mV9
Load regulation ΔVO(1)IO = 250 to 750 mA, TJ = 25°C; VI = -19 V, CI = 2.2 uF, CO = 1 uFmax 120 mV9
Quiescent current IdTJ = 25°C; VI = -19 V, IO = 500 mA, CI = 2.2 uF, CO = 1 uFmax 3 mA9
Quiescent current change ΔIdIO = 5 mA to 1 A; TJ = 0 to 125 °C, VI = -19 V, CI = 2.2 uF, CO = 1 uFmax 0.5 mA9
Quiescent current change ΔIdVI = -15 to -30 V; TJ = 0 to 125 °C, IO = 500 mA, CI = 2.2 uF, CO = 1 uFmax 1 mA9
Output voltage drift ΔVO/ΔTIO = 5 mA; TJ = 0 to 125 °C, VI = -19 V, CI = 2.2 uF, CO = 1 uFtyp -0.8 mV/°C9
Output noise voltage eNB = 10Hz to 100kHz, TJ = 25°C; VI = -19 V, IO = 500 mA, CI = 2.2 uF, CO = 1 uFtyp 200 uV9
Supply voltage rejection SVRΔVI = 10 V, f = 120Hz; TJ = 0 to 125 °C, VI = -19 V, IO = 500 mA, CI = 2.2 uF, CO = 1 uFmin 54 · typ 60 dB9
Dropout voltage VdIO = 1 A, TJ = 25°C, ΔVO = 100 mV; VI = -19 V, CI = 2.2 uF, CO = 1 uFtyp 1.1 V9
Short circuit current IscTJ = 0 to 125 °C, VI = -19 V, CI = 2.2 uF, CO = 1 uFtyp 1.5 A9

Ordering codes, by the datasheet

4
L7912CV
TO-220 · -12 V output · p. 1
L7912CV-DG
TO-220 · -12 V output; Dual Gauge frame · p. 1
L7912CD2T-TR
D²PAK · -12 V output · p. 1
L7912CP
TO-220FP · -12 V output · p. 1

Parameters

20
Current Limit
1.5A
Dropout Voltage
1.1V@(1A)
Features
Short Circuit Protection
Junction Temperature(Max)
150℃
Maximum Input Voltage
35V
Noise
200uV
Number of Outputs
1
Operating Temperature
0℃~+150℃@(Tj)
Output Configuration
Negative
Output Current
1.5A
Output Polarity
Negative
Output Type
Fixed
Output Voltage
12V
Power Supply Rejection Ratio (PSRR)
60dB@(120Hz)
Thermal Resistance(Junction to Ambient)
50℃/W
Thermal Resistance(Junction to Case)
5℃/W
Voltage - Supply
27V
Voltage - Supply(Absolute Max)
35V
Voltage Dropout
1.1V
standby current
3mA

Order codes

1

Pinout

3
The pins of the L7912CV
PinNameType
1GNDPower in
2VIPower in
3VOPower out

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    juamorenogo/DCSource_DIY

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Questions

Is there a KiCad symbol and footprint for the L7912CV?

Yes. The symbol is Regulator_Linear:L7912 and the footprint EasyEDA_Pro:to-220-3_l10.0-w4.5-p2.54-l, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the L7912CV?

TO-220, with 3 pins. Its footprint is drawn on this page.

Where is the L7912CV datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the L7912CV?

JLCPCB lists it as part C111886, with 368 in stock; the sellers' links on this page open their listings.

What can replace the L7912CV?

Parts like it in the library: the L7812CV-DG by STMicroelectronics, the L7912CV-DG by STMicroelectronics, the 7812 by BLUE ROCKET and the CJ7812 by Jiangsu Changjing Electronics Technology (CJ). Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the L7912CV?

5 boards in 4 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8