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PDF GM7900 Data sheet ( Hoja de datos )
| Número de pieza | GM7900 | |
| Descripción | 1.5A NEGATIVE VOLTAGE REGULATOR | |
| Fabricantes | Gamma Microelectronics | |
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GM7900 Series
1.5A NEGATIVE VOLTAGE REGULATOR
Description
The GM7900 series of fixed-negative voltage
monolithic integrated circuit voltage regulators is
designed to complement Series GM7800 in a
wide range of applications.
These applications include on-card regulation for
elimination of noise and distribution problems
associated with single-point regulation. Each of
these regulators can deliver up to 1.5A of output
current.
The internal limiting and thermal shutdown
features of these regulators make them
essentially immune to overload. In addition to use
as fixed-voltage regulators, these devices can be
used with external components to obtain
adjustable output voltages and current and also
as the power pass element in precision
regulators.
The GM7900 series are available in TO-220, TO-
252, TO-263 packages.
Features
Output current up to 1.5A
Available Output Voltage Options from -
5V to -24V
3- Terminal Regulators
Internal Thermal Overload Protection
Internal Short-Circuit Current Limiting
Output Transistor Safe-Area Protection
TO-220, TO-252 and TO-263 Packages
High Power Dissipation Capability
Typical Application Circuit
VIN
CIN
2µF
GM7900
COUT
1µF
VOUT
1.5A
COUT 2
0.1µF
When using a negative regulator, bypass capacitors are a must on both input and output. Recommended values are 2µF on the
input and 1µF on the output. It is considered good practice to include a 0.1µF capacitor on the output to improve the transient
response. These capacitors may mylar, ceramic, or tantalum, provided that they have good high frequency characteristics
www.gammamicro.com.tw 1
Free Datasheet http://www.datasheet4u.com/
1 page  
GM7900 Series
1.5A NEGATIVE VOLTAGE REGULATOR
GM7908 Electrical Characteristics (VI = -14V, IO = 500mA unless otherwise noted)
Parameter
Test Condition (Note 1)
Min Typ Max Unit
Output Voltage (note *)
Input Regulation
IO =5mA to 1A
VI = -10.5V to -23V, P 15W
VI = -10.5V to -25V
VI = -11V to -17V
25°C
-7.7
0°C to 125°C -7.6
25°C
-8.0
-8.0
12.5
4
-8.3
-8.4
160
80
V
mV
Ripple Rejection
VI = -11.5V to -21.5V, f = 120KHz 0°C to 125°C 54 60
dB
Output Regulation
Temperature Coefficient
of Output Voltage
Output Noise Voltage
IO = 5mA to 1.5A
IO = 250mA to 750mA
IO = 5mA
f = 10Hz to 100KHz
25°C
0°C to 125°C
25°C
15 160
5 80
mV
-0.8 mV/°C
200 µV
Dropout Voltage
IO = 1A
25°C
1.6 V
Bias Current
25°C
1.5 2
mA
Bias Current Change
VI = -10.5V to -25V
IO = 5mA to 1A
0°C to 125°C
0.15 1
0.08 0.5
mA
Peak Output Current
25°C
2.1 A
GM7909 Electrical Characteristics (VI = -15V, IO = 500mA unless otherwise noted)
Parameter
Test Condition (Note 1)
Min Typ Max Unit
Output Voltage (note *)
Input Regulation
IO =5mA to 1A
VI = -11.5V to -25V, P 15W
VI = -11.5V to -25V
VI = -14.5V to -22V
25°C
8.64 9.0 9.36
0°C to 125°C 8.55 9.0 9.45
25°C
12.5 180
4 90
V
mV
Ripple Rejection
VI = -12.5V to -24V, f = 120KHz 0°C to 125°C 54
60
dB
Output Regulation
Temperature Coefficient
of Output Voltage
Output Noise Voltage
IO = 5mA to 1.5A
IO = 250mA to 750mA
IO = 5mA
f = 10Hz to 100KHz
25°C
0°C to 125°C
25°C
15 180
5 90
mV
-1.0 mV/°C
225 µV
Dropout Voltage
IO = 1A
25°C
1.6 V
Bias Current
25°C
1.5 2
mA
Bias Current Change
VI = -11.5V to -25V
IO = 5mA to 1A
0°C to 125°C
0.15 1
0.08 0.5
mA
Peak Output Current
25°C
2.2 A
Note *: This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Note 1: Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible.
Thermal effects must be taken into account separately.
5
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet GM7900.PDF ] | |
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