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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)： | 2/16頁 |
| 文件大?。?/td> | 252K |
| 代理商： | L4973V5.1 |
Realized in BCD mixed technology, the device
uses an internal power D-MOS transistor (with a
typical Rdson of 0.15ohm) to obtain very high effi-
ciency and very fast switching times.
Switching frequency up to 300KHz are achievable
(the maximum power dissipation of the packages
must be observed).
A wide input voltage range between 8V to 55V
and output voltages regulated from 3.3V to 40V
cover the majority of the today applications.
Features of this new generation of DC-DC con-
verter includes pulse by pulse current limit, hiccup
mode for output short circuit protection, voltage
feed forward regulation, soft start, input/output
synchronization, protection against feedback loop
disconnection, inhibit for zero current consump-
tion and thermal shutdown.
Packages available are in plastic dual in line, DIP-
18 (12+3+3) for standard assembly, and SO20
(12+4+4) for SMD assembly.
PIN CONNECTIONS (Top view
)
OSC
OUT
OUT
GND
GND
V
CC
V
CC
GND
BOOT
1
3
2
4
5
6
7
8
9
INH
VFB
COMP
GND
GND
GND
V5.1
SS
SYNC
18
17
16
15
14
12
13
11
10
D94IN162A
POWERDIP (12+3+3)
OSC
OUT
OUT
GND
GND
GND
GND
V
CC
V
CC
VFB
COMP
GND
GND
GND
GND
V5.1
SS
SYNC
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
BOOT
INH
D94IN163A
SO20 (12+4+4)
VREF
GOOD
5.1V
COMP
VFB
SYNC
BOOT
DRIVER
HICCUP CURRENT
LIMITING
INTERNAL
REFERENCE
SS
INH
ZERO CURRENT
INHIBIT
D94IN161B
+
-
3.3V
V5.1
E/A
SOFT
START
5.1V
3.3V
THERMAL
SHUTDOWN
INTERNAL
SUPPLY
5.1V
-
+
PWM
CURRENT
LIMITING
R
S
Q
Q
CBOOT
CHARGE
OSCILLATOR
OUT
OUT
GND
OSC
V
CC
V
CC
17(19)
11(12)
12(13)
18(20)
1(1)
2(2)
3(3)
9(10)
8(9)
7(8)
16(18)
10(11)
4,5,6,13,14,15
(4,5,6,7,14,15,16,17)
Pin x = Powerdip
Pin (x) = S020
BLOCK DIAGRAM
L4973V3.3 - L4973V5.1 - L4973D3.3 - L4973D5.1
2/16
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| L4976 | 1A Step Down Switching Regulator(步降開關(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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