TO-3

L7908CV

ObsoleteVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsTO-3

IC REG LINEAR -8V 1.5A TO220AB

L7908CV is a -8V fixed negative voltage linear regulator from STMicroelectronics in TO-3 package, with up to 1.5A output current, featuring thermal overload and short-circuit protection.Checked against the datasheet

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Technical parameters

Key specs

Output voltage-7.7 ~ -8.3 VMax: -8.3 V (Tj=25°C)，Max: -8.4 V (Io=5 mA to 1A，Po<15W，Vi=-11.5 to -23V)

Output current1.5 AMax

Input voltage-11.5 ~ -23 VRecommended: -11.5 to -23 V (for Vo=-8V)，Absolute Max: -35 V (for Vo=-5 to -18V)

Dropout voltage1.1 VMax · Max: 1.1 V (Tj=25°C，Io=1A，ΔVo=100 mV)

Quiescent current2 mAMax · Max: 2 mA (Tj=25°C)

Datasheet-verified parameters

16 items

Parameter	Value and test conditions	Source
Output voltage	Min: -7.7 V, Typ: -8 V, Max: -8.3 V (Tj=25°C); Min: -7.6 V, Typ: -8 V, Max: -8.4 V (Io=5 mA to 1A, Po<15W, Vi=-11.5 to -23V)
Output current	Up to 1.5A (with adequate heatsinking); Internally limited (Absolute Max)
Input voltage range	Recommended: -11.5 to -23 V (for Vo=-8V); Absolute Max: -35 V (for Vo=-5 to -18V)
Dropout voltage	Max: 1.1 V (Tj=25°C, Io=1A, ΔVo=100 mV)
Quiescent current	Max: 2 mA (Tj=25°C)
Package	TO-3
Operating junction temperature	0 to +150 °C
Storage temperature	-65 to +150 °C
Line regulation	Max: 160 mV (Tj=25°C, Vi=-10.5 to -25V); Max: 80 mV (Tj=25°C, Vi=-11 to -17V)
Load regulation	Max: 160 mV (Tj=25°C, Io=5 mA to 1.5A); Max: 80 mV (Tj=25°C, Io=250 to 750 mA)
Output voltage drift	Max: -0.6 mV/°C (Io=5 mA)
Output noise voltage	Max: 175 μV (B=10Hz to 100KHz, Tj=25°C)
Supply voltage rejection	Min: 54 dB, Typ: 60 dB (f=120 Hz, ΔVi=10V)
Short circuit current	Typ: 2 A
Short circuit peak current	Max: 2.5 A (Tj=25°C)
Protection features	Thermal overload protection, Short circuit protection, Output transistor SOA protection

All parameters (21)ExpandCollapse

Power
Current - Output	1.5A
Current - Quiescent (Iq)	3 mA
Voltage Dropout (Max)	1.1V @ 1A (Typ)
Voltage - Input (Max)	-35V
Voltage - Output (Max)	-
Voltage - Output (Min/Fixed)	-8V
AC and DC characteristics
PSRR	60dB (120Hz)
Environment and package
Mounting Type	Through Hole
Operating Temperature	0°C ~ 125°C
Package	Tube
Package / Case	TO-220-3
Supplier Device Package	TO-220
Other
Base Product Number	L7908
Control Features	-
Mfr	STMicroelectronics
Number of Regulators	1
Output Configuration	Negative
Output Type	Fixed
Product Status	Obsolete
Protection Features	Over Temperature, Short Circuit
Series	-

Pinout and package

PackageTO-3

Pin	Name	Function
1	GND	(Ground)
2	OUTPUT	(Output)
3	INPUT	(Input), Tab connected to pin 3

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