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参数资料
| 型号： | L5972D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | ROHS COMPLIANT, SOP-8 |
| 文件页数： | 1/15页 |
| 文件大小： | 241K |
| 代理商： | L5972D |
October 2007
Rev 10
1/15
15
L5972D
2A switch step down switching regulator
Features
■ 2A internal switch
■ Operating input voltage from 4.4V to 36V
■ Output voltage adjustable from 1.235V to 35V
■ Low dropout operation: 100% duty cycle
■ 250kHz Internally fixed frequency
■ Voltage feedforward
■ Zero load current operation
■ Internal current limiting
■ Protection against feedback disconnection
■ Thermal shutdown
Applications
■ Consumer: STB, DVD, TV, VCR, car radio,
LCD monitors
■ Networking: XDSL, modems, DC-DC modules
■ Computer: printers, audio/graphic cards,
optical storage, hard disk drive
■ Industrial: changers, car battery, DC-DC
converters
Figure 1.
Test application circuit
Description
The L5972D is a step down monolithic power
switching regulator with a minimum switch current
limit of 2A so it is able to deliver more than 1.5A
DC current to the load depending on the
application conditions.
The output voltage can be set from 1.235V to 35V.
The device uses an internal P-Channel D-MOS
transistor (with a typical Rdson of 250m
) as
switching element to minimize the size of the
external components.
An internal oscillator fixes the switching frequency
at 250kHz.
Having a minimum input voltage of 4.4V only, it is
particularly suitable for 5V bus, available in all
computer related applications.
Pulse by pulse current limit with the internal
frequency modulation offers an effective constant
current short circuit protection.
SO8
D03IN1436
8
2
4
5
1
7
L5972D
C1
10
F
35V
CERAMIC
C2
100
F
10V
VOUT=3.3V
VIN = 4.4V to 35V
R1
5.6K
R2
3.3K
R3
4.7K
C4
22nF
C3
220pF
3
L1 33
H
6
D1
STPS2L40U
COMP
VCC
OUT
FB
GND
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PDF描述 |
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| L5973AD | 2.3 A SWITCHING REGULATOR, PDSO8 |
| L5973D | 3.5 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5973D013TR | 3.5 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5980TR | 1.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L5972D_0710 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2A switch step down switching regulator |
| L5972D013TR | 功能描述:直流/直流开关调节器 1.235 to 35V Step-Dn RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L5973 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2.5A SWITCH STEP DOWN SWITCHING REGULATOR |
| L5973A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2A SWITCH STEP DOWN SWITCHING REGULATOR |
| L5973AD | 功能描述:直流/直流开关调节器 1.235 to 35V Step-Dn RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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