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參數(shù)資料
| 型號： | L4976 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 1A Step Down Switching Regulator(步降開關(guān)穩(wěn)壓器) |
| 中文描述： | 第1A降壓開關(guān)穩(wěn)壓器（步降開關(guān)穩(wěn)壓器） |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 99K |
| 代理商： | L4976 |
PIN FUNCTIONS
DIP
1
2
3
SO (*)
2
3
4
Name
GND
VREF
OSC
Function
Ground
5.1V Reference voltage with 20mA current capability.
An external resistor connected between the unregulated input voltage and this pin and
a capacitor connected from this pin to ground fix the switching frequency. (Line feed
forward is automatically obtained)
Stepdown regulator output
Unregulated DC input voltage
A capacitor connectedbetween this pin and OUT allows to drive the internal VDMOS
E/A output to be used for frequency compensation
Stepdown feedback input. Connecting directly to this pin results inan output voltage of
3.3V. An external resistive divider is required for higher output voltages.
4
5
6
7
8
5, 6
11
12
13
14
OUT
V
CC
BOOT
COMP
FB
(*) Pins 1, 7, 8, 9, 10, 15 and 16 are not connected.
PIN CONNECTIONS
GND
V
REF
OSC
OUT
1
3
2
4
VCC
BOOT
COMP
FB
8
7
6
5
N.C.
GND
V
REF
OSC
OUT
N.C.
OUT
N.C.
N.C.
N.C.
BOOT
VCC
COMP
FB
N.C.
N.C.
1
3
2
4
5
6
7
8
14
13
12
11
10
9
15
16
V
REF
VOLTAGES
MONITOR
THERMAL
SHUTDOWN
E/A
PWM
3.3V
OSCILLATOR
R
S
Q
INTERNAL
REFERENCE
5.1V
DRIVE
CBOOT
CHARGE
CBOOT
CHARGE
AT LIGHT
LOADS
2
8
FB
COMP
3
1
4
6
5
BOOT
OSC
GND
OUT
V
CC
3.3V
V
REF
BLOCK DIAGRAM
Minidip
SO16W
L4976
2/11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L4976(D) | 制造商:STMicroelectronics 功能描述:Bulk |
| L4976_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1A step down switching regulator |
| L4976D | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3 to 50V 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 |
| L4976D013TR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3 to 50V 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 |
| L4977 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
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