参数资料
型号: L7920CV
厂商: 意法半导体
元件分类: 基准电压源/电流源
英文描述: NEGATIVE VOLTAGE REGULATORS
中文描述: 负电压调节器
文件页数: 8/13页
文件大小: 111K
代理商: L7920CV
Figure 1 :
Fixed Output Regulator.
Figure 2 :
Split PowerSupply (
±
15V/1A).
Notes :
1. To specify an output voltage, substitute voltage value for ”XX”.
2. Required for stability. For value given, capacitor must be solid
tantalum. If aluminium electrolitics are used, at least ten times
value should be selected. C
1
is required if regulator is located an
appreciable distance from power supply filter.
3. To improve transient response. If large capacitors are used, a
high current diode from input to output (1N4001 or similar) should
be introduced to protect the device from momentary input short
circuit.
Against potential latch-up problems.
APPLICATION INFORMATION
Figure 3 :
Circuitfor IncreasingOutput Voltage.
Figure 4 :
High CurrentNegative Regulator
(– 5V/4Awith 5A current limiting).
C3 Optional for improvedtransient response and ripple rejection.
Figure 5 :
Typical ECL System PowerSupply
(– 5.2V/4A).
Optional dropping resistor to reduce the power dissipated in the
boost transistor.
V
O
= V
XX
R
1
+
R
2
R
2
V
XX
R
2
>
3
I
d
L7900
8/13
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