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參數(shù)資料
| 型號： | L4979D |
| 廠商： | 意法半導體 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | LOW DROP VOLTAGE REGULATOR |
| 中文描述： | 低壓差穩(wěn)壓器 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 268K |
| 代理商： | L4979D |
L4979MD L4979D
2/10
Table 2. Pin Function
SO8
N°
1
Figure 3. Pins Connection
(Top view)
SO20
N°
1
Pin
Name
En
Function
Enable input
If high, regulator, watchdog and reset are operating. If low, regulator, watchdog
and reset are shut down.
Ground reference
Ground
These pins are to be connected to a heat spreader electrically grounded
Reset output.
It is pulled down when output voltage drops below Vo_th or frequency at Wi is too
low.
Reset timing adjust
A capacitor between Vcr pin and gnd sets the reset delay time (trd)
Watchdog timer adjust
A capacitor between Vcw pin and gnd sets the time response of the watchdog
monitor.
Watchdog input.
If the frequency at this input pin is too low, the Reset output is activated.
Voltage regulator output
Output capacitor >100nF is needed for regulator stability
Supply voltage
Supply capacitor (e.g. 200nF) is needed for regulator stability.
not connected
2
4
gnd
gnd
5,6,15,16
3
7
Res
4
10
Vcr
5
11
Vcw
6
14
Wi
7
17
Vo
8
20
Vs
2, 3, 8, 9, 12,
13, 18, 19
N. C.
EN
GND
RES
VCR
VCW
WI
V
O
V
S
1
3
2
4
6
5
7
8
SO8
EN
N.C.
N.C.
GND
GND
RES
GND
N.C.
N.C.
N.C.
N.C.
WI
GND
GND
V
O
N.C.
N.C.
V
S
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
VCR
WCW
D00AT457
SO8
SO20
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L4979D_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW DROP VOLTAGE REGULATOR |
| L4979D013TR | 功能描述:低壓差穩(wěn)壓器 - LDO Lo DROP Vltg REG RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L4979D13TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW DROP VOLTAGE REGULATOR |
| L4979D-E | 功能描述:低壓差穩(wěn)壓器 - LDO LOW DROP VOLT REG RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L4979DTR-E | 功能描述:低壓差穩(wěn)壓器 - LDO LOW DROP VOLT REG RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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