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L7908CV Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer L7908CV
Beschreibung NEGATIVE VOLTAGE REGULATORS
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 28 Seiten
L7908CV Datasheet, Funktion
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
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L7908CV Datasheet, Funktion
Test circuit
4 Test circuit
Figure 3. Test circuit
L79
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L7908CV pdf, datenblatt
Electrical characteristics
L79
Refer to the test circuits, TJ = 0 to 125 °C, VI = -23 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF
unless otherwise specified.
Table 9. Electrical characteristics of L7915AC
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
TJ = 25°C
-14.7 -15 -15.3 V
VO Output voltage
IO = -5 mA to -1 A, PO 15 W
VI = -18.5 to -30 V
-14.4 -15 -15.6 V
ΔVO(1) Line regulation
VI = -17.5 to -30 V, TJ = 25°C
VI = -20 to -26 V, TJ = 25°C
300
mV
150
ΔVO(1) Load regulation
IO = 5 mA to 1.5 A, TJ = 25°C
IO = 250 to 750 mA, TJ = 25°C
300
mV
150
Id Quiescent current
TJ = 25°C
3 mA
ΔId
IO = 5 mA to 1 A
Quiescent current change
VI = -18.5 to -30 V
0.5
mA
1
ΔVO/ΔT Output voltage drift
IO = 5 mA
-0.9 mV/°C
eN Output noise voltage
B = 10 Hz to 100 kHz, TJ = 25°C
250 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
1.1 V
Isc Short circuit current
1.3 A
Iscp Short circuit peak current TJ = 25°C
2.5 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.
12/28
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