參數(shù)資料
型號(hào)： L7920C
廠商： 意法半導(dǎo)體
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： Negative Voltage Regulator(輸出負(fù)電壓穩(wěn)壓器)
中文描述： 負(fù)電壓穩(wěn)壓器（輸出負(fù)電壓穩(wěn)壓器）
文件頁(yè)數(shù)： 10/24頁(yè)
文件大?。?/td> 822K
代理商： L7920C
Electrical characteristics
L79xxC
10/24
Electrical characteristics of L7918C
(refer to the test circuits, T
J
= 0 to 125 °C, V
I
= -27 V,
I
O
= 500 mA, C
I
= 2.2 μF, C
O
= 1 μF unless otherwise specified)
Parameter
Test conditions
Electrical characteristics of L7920C
(refer to the test circuits, T
J
= 0 to 125 °C, V
I
= -29 V,
I
O
= 500 mA, C
I
= 2.2 μF, C
O
= 1 μF unless otherwise specified)
Parameter
Test conditions
Table 9.
Symbol
Min.
Typ.
Max.
Unit
V
O
Output voltage
T
J
= 25°C
I
O
= -5 mA to -1 A, P
O
≤
15 W
V
I
= -22 to -33 V
-17.3
-18
-18.7
V
V
O
Output voltage
-17.1
-18
-18.9
V
Δ
V
O(1)
Line regulation
V
I
= -21 to -33 V, T
J
= 25°C
360
mV
V
I
= -24 to -30 V, T
J
= 25°C
180
Δ
V
O(1)
Load regulation
I
O
= 5 mA to 1.5 A, T
J
= 25°C
360
mV
I
O
= 250 to 750 mA, T
J
= 25°C
180
I
d
Quiescent current
T
J
= 25°C
3
mA
Δ
I
d
Quiescent current change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= -22 to -33 V
1
Δ
V
O
/
Δ
T
Output voltage drift
I
O
= 5 mA
-1
mV/°C
eN
Output noise voltage
B = 10Hz to 100KHz, T
J
= 25°C
Δ
V
I
= 10 V, f = 120Hz
I
O
= 1 A, T
J
= 25°C,
Δ
V
O
= 100 mV
300
μV
SVR
Supply voltage rejection
54
60
dB
V
d
Dropout voltage
1.1
V
I
sc
Short circuit current
1.1
A
1.
Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 10.
Symbol
Min.
Typ.
Max.
Unit
V
O
Output voltage
T
J
= 25°C
I
O
= -5 mA to -1 A, P
O
≤
15 W
V
I
= -24 to -35 V
-19.2
-20
-20.8
V
V
O
Output voltage
-19
-20
-21
V
Δ
V
O(1)
Line regulation
V
I
= -23 to -35 V, T
J
= 25°C
400
mV
V
I
= -26 to -32 V, T
J
= 25°C
200
Δ
V
O(1)
Load regulation
I
O
= 5 mA to 1.5 A, T
J
= 25°C
400
mV
I
O
= 250 to 750 mA, T
J
= 25°C
200
I
d
Quiescent current
T
J
= 25°C
3
mA
Δ
I
d
Quiescent current change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= -24 to -35 V
1
Δ
V
O
/
Δ
T
Output voltage drift
I
O
= 5 mA
-1.1
mV/°C
eN
Output noise voltage
B = 10Hz to 100KHz, T
J
= 25°C
Δ
V
I
= 10 V, f = 120Hz
I
O
= 1 A, T
J
= 25°C,
Δ
V
O
= 100 mV
350
μV
SVR
Supply voltage rejection
54
60
dB
V
d
Dropout voltage
1.1
V
I
sc
Short circuit current
0.9
A
1.
Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
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