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PDF ( 数据手册 , 数据表 ) L7912ACV

零件编号 L7912ACV
描述 2% NEGATIVE VOLTAGE REGULATORS
制造商 STMicroelectronics
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L7912ACV 数据手册, 描述, 功能
L79
Negative voltage regulators
Datasheet - production data
Description
TO-220
TO-220FP
D²PAK
Features
Output current up to 1.5 A
Output voltages of - 5; - 8; - 12; - 15 V
The L79 series of three-terminal negative
regulators is available in TO-220, TO-220FP and
D²PAK packages and several fixed output
voltages, making it useful in a wide range of
applications. These regulators can provide local
on-card regulation, eliminating the distribution
problems associated with single point regulation;
furthermore, having the same voltage option as
the L78 positive standard series, they are
particularly suited for split power supplies. If
adequate heat sinking is provided, they can
deliver over 1.5 A output current. Although
designed primarily as fixed voltage regulators,
these devices can be used with external
components to obtain adjustable voltages and
currents.
Thermal overload protection
Short circuit protection
Output transition SOA protection
Output tolerance 2% (AC version) or 4%
(C version) at 25°C
Table 1. Device summary
TO-220
(single gauge)
Order codes
TO-220
(dual gauge)
D²PAK
TO-220FP
Output
voltages
L7905ACV
L7905CV
L7908CV
L7912ACV
L7912CV
L7915ACV
L7915CV
L7905ACV-DG
L7905CV-DG
L7908CV-DG
L7912ACV-DG
L7912CV-DG
L7915ACV-DG
L7915CV-DG
L7905ACD2T-TR
L7905CD2T-TR
L7912CD2T-TR
L7905CP
L7912CP
L7915CP
-5V
-5V
-8V
- 12 V
- 12 V
- 15 V
- 15 V
June 2014
This is information on a product in full production.
DocID2149 Rev 22
1/28
www.st.com







L7912ACV pdf, 数据表
Electrical characteristics
L79
Refer to the test circuits, TJ = 0 to 125 °C, VI = -10 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF
unless otherwise specified.
Table 5. Electrical characteristics of L7905C
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
TJ = 25°C
-4.8 -5 -5.2 V
VO Output voltage
IO = -5 mA to -1 A, PO 15 W
VI = -8 to -20 V
-4.75 -5 -5.25 V
ΔVO(1) Line regulation
VI = -7 to -25 V, TJ = 25°C
VI = -8 to -12 V, TJ = 25°C
100
mV
50
ΔVO(1) Load regulation
IO = 5 mA to 1.5 A, TJ = 25°C
IO = 250 to 750 mA, TJ = 25°C
100
mV
50
Id Quiescent current
TJ = 25°C
3 mA
ΔId
IO = 5 mA to 1 A
Quiescent current change
VI = -8 to -25 V
0.5
mA
1.3
ΔVO/ΔT Output voltage drift
IO = 5 mA
-0.4 mV/°C
eN Output noise voltage
B = 10 Hz to 100 kHz, TJ = 25°C
100 µV
SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz
54 60
dB
Vd Dropout voltage
IO = 1 A, TJ = 25°C, ΔVO = 100 mV
1.4 V
Isc Short circuit current
2.1 A
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
8/28 DocID2149 Rev 22







L7912ACV equivalent, schematic
Package mechanical data
7 Package mechanical data
L79
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 8. TO-220 (single gauge) drawing
16/28
DocID2149 Rev 22
BUHY'










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