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參數(shù)資料
| 型號： | L4973V5.1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 3.5A Step Down Switching Regulator(3.5A步降開關(guān)穩(wěn)壓器) |
| 中文描述： | 3.5A的降壓開關(guān)穩(wěn)壓器（3.5A的步降開關(guān)穩(wěn)壓器） |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 252K |
| 代理商： | L4973V5.1 |
L4973V3.3 - L4973V5.1
L4973D3.3 - L4973D5.1
3.5A STEP DOWN SWITCHING REGULATOR
UP TO 3.5A STEP DOWN CONVERTER
OPERATING INPUT VOLTAGE FROM 8V TO
55V
3.3V AND 5.1V (
±
1%) FIXED OUTPUT VOLT-
AGES
OUTPUT VOLTAGE ADJUSTABLE FROM:
0V TO 50V (L4973V3)
5.1V TO 50V (L4973V5)
FREQUENCY ADJUSTABLE UP TO 300KHz
VOLTAGE FEED FORWARD
ZERO LOAD CURRENT OPERATION (min
1mA)
INTERNAL CURRENT LIMITING (PULSE BY
PULSE AND HICCUP MODE)
PRECISE 5.1V (1.5%) REFERENCE VOLT-
AGE EXTERNALLY AVAILABLE
INPUT/OUTPUT SYNCHRONIZATION FUNC-
TION
INHIBIT FOR ZERO CURRENT CONSUMP-
TION (100
μ
A Typ. at V
CC
= 24V)
PROTECTION AGAINST FEEDBACK DIS-
CONNECTION
THERMAL SHUTDOWN
OUTPUT OVERVOLTAGE PROTECTION
SOFT START FUNCTION
DESCRIPTION
The L4973 is a step down monolithic power
switching regulator delivering 3.5A at fixed volt-
ages of 3.3V or 5.1V and using a simple external
divider output adjustable voltage up to 50V.
July 1998
L4973
V
CC
(8V to 55V)
C
IN
C2
R
OSC
C
OSC
D1
L1
C
OUT
V
O
(3.3V or 5.1V)
C
BOOT
4,5,6,
13,14,15
7
9
8
1
11
3
10
D97IN554A
17
R
COMP
C
COMP
C
SS
2
16
12
TYPICAL APPLICATION CIRCUIT (POWERDIP)
POWERDIP (12+3+3) SO20(12+4+4)
ORDERING NUMBERS:
L4973V3.3 (Powerdip)
L4973D3.3 (SO20)
L4973V5.1 (Powerdip)
L4973D5.1 (SO20)
MULTIPOWER BCD TECHNOLOGY
1/16
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| L4976 | 1A Step Down Switching Regulator(步降開關(guān)穩(wěn)壓器) |
| L4977A | Power Switching Regulator(功率開關(guān)穩(wěn)壓器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L4974 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A SWITCHING REGULATOR |
| L4974A | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.1 to 40V Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L4974A | 制造商:STMicroelectronics 功能描述:IC SWITCHING REG 3.5A 4974 DIP20 |
| L4974AE | 制造商:STMicroelectronics 功能描述: |
| L4975 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5A SWITCHING REGULATOR |
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