參數(shù)資料
型號: AN78L20
廠商: PANASONIC CORP
元件分類: 基準電壓源/電流源
英文描述: 3-pin positive output voltage regulator (100 mA type)
中文描述: 20 V FIXED POSITIVE REGULATOR, PBCY3
封裝: SSIP-3
文件頁數(shù): 10/12頁
文件大小: 179K
代理商: AN78L20
AN78Lxx/AN78LxxM Series
10
SFF00005CEB
I
Usage Notes
1. Cautions for a basic circuit
C
I
: When a wiring from a smoothing circuit to a three-pin regulator
is long, it is likely to oscillate at output. A capacitor of 0.1
μ
F to
0.47
μ
F should be connected near an input pin.
C
O
: When any sudden change of load current is likely to occur,
connect an electrolytic capacitor of 10
μ
F to 100
μ
F to improve a
transitional response of output voltage.
D
i
: Normally unnecessary. But add it in the case that there is a
residual voltage at the output capacitor Co even after switching
off the supply power because a current is likely to flow into an
output pin of the IC and damage the IC.
2. Other caution items
1) Short-circuit between the input pin and GND pin
If the input pin is short-circuitted to GND or is cut
off when a large capacitance capacitor has been con-
nected to the IC's load, a voltage of a capacitor con-
nected to an output pin is applied between input/out-
put of the IC and this likely results in damage of the
IC. It is necessary, therefore, to connect a diode, as
shown in figure 2, to counter the reverse bias between
input/output pins.
2) Floating of GND pin
If a GND pin is made floating in an operating mode, an unstabilized input voltage is outputted. In this case, a
thermal protection circuit inside the IC does not normally operate. In this state, if the load is short-circuited or
overloaded, it is likely to damage the IC.
I
Application Circuit Examples
Figure 1
C
O
V
O
C
I
V
I
D
i
1
3
2
In
GND
Out
Figure 2
C
O
1
3
2
+
I
Basic Regulator Circuit
C
O
C
I
Input
Output
AN78Lxx
1
2
3
C
I
is necessary when the input line is long.
C
O
improves the transient response.
V
O
V
O
0.33
μ
F
0.1
μ
F
V
I
V
I
I
O
I
Bias
V
O
=
V
O
'
+
I
Bias
+
'
1
R
2
Note) V
O
varies due to sample to sample variation of I
Bias
.
Never fail to adjust individually with R
1
.
V
O
20
Q
1
AN78Lxx
AN78Lxx
3
1
3
2
1
2
R
2
R
1
V
O
'
相關PDF資料
PDF描述
AN78L20M 3-pin positive output voltage regulator (100 mA type)
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AN78L24M AB 6C 4#16 2#8 PIN RECP
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AN78LxxM Circular Connector Shell; MIL SPEC:MIL-C-5015 A/B/C; Body Material:Aluminum Alloy; Series:97-3100; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Wall Mount Receptacle; Gender:Male-Female Adapter
相關代理商/技術參數(shù)
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AN78L20ME1 功能描述:IC REG LDO 20V .1A TO243 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結構:正,固定式和可調式 輸出電壓:3.3V,1.25 V ~ 5.7 V 輸入電壓:4.5 V ~ 7 V 電壓 - 壓降(標準):1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制(最?。?1A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-5,DPak(4 引線 + 接片),TO-252AD 供應商設備封裝:PPAK 包裝:管件 其它名稱:497-3576-5
AN78L24 功能描述:IC REG LDO 24V .1A TO-92 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結構:正,固定式和可調式 輸出電壓:3.3V,1.25 V ~ 5.7 V 輸入電壓:4.5 V ~ 7 V 電壓 - 壓降(標準):1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制(最?。?1A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-5,DPak(4 引線 + 接片),TO-252AD 供應商設備封裝:PPAK 包裝:管件 其它名稱:497-3576-5
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AN78L24ME1 功能描述:IC REG LDO 24V .1A TO243 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結構:正,固定式和可調式 輸出電壓:3.3V,1.25 V ~ 5.7 V 輸入電壓:4.5 V ~ 7 V 電壓 - 壓降(標準):1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制(最?。?1A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-5,DPak(4 引線 + 接片),TO-252AD 供應商設備封裝:PPAK 包裝:管件 其它名稱:497-3576-5