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参数资料
| 型号： | L5971D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | SO-16 |
| 文件页数： | 1/11页 |
| 文件大小： | 158K |
| 代理商： | L5971D |
UP TO 1.5A STEP DOWN CONVERTER
OPERATING INPUT VOLTAGE FROM 6.5V
TO 28V
PRECISE 1.26V (
±1%) INTERNAL REFER-
ENCE VOLTAGE
OUTPUT VOLTAGE ADJUSTABLE FROM
1.26V TO 20V
SWITCHING FREQUENCY ADJUSTABLE UP
TO 300KHz
VOLTAGE FEEDFORWARD
ZERO LOAD CURRENT OPERATION
INTERNAL CURRENT LIMITING (PULSE-BY-
PULSE AND HICCUP MODE)
INHIBIT FOR ZERO CURRENT CONSUMP-
TION
PROTECTION AGAINST FEEDBACK DIS-
CONNECTION
THERMAL SHUTDOWN
SOFT START FUNCTION
DESCRIPTION
The L5971 is a step down monolithic power
switching regulator delivering 1.5A at a voltage
between 1.26V and 20V (selected by a simple
external divider). Realized in BCD mixed technol-
ogy, the device uses an internal power D-MOS
transistor (with a typical Rdson of 0.25
) to ob-
tain very high efficency and high switching speed.
A switching frequency up to 300KHz is achiev-
able (the maximum power dissipation of the pack-
ages must be observed).
Features of this new generations of DC-DC con-
verter include pulse-by-pulse current limit, hiccup
mode for short circuit protection, voltage feedfor-
ward regulation, soft-start, protection against
feedback loop disconnection, inhibit for zero cur-
rent consumption and thermal shutdown.
The device is available in plastic dual in line,
MINIDIP 8 for standard assembly, and SO16 for
SMD assembly.
Typical Applications:
- High efficiency step-down converter
- Portable computers
- Battery charger
- Distributed power
- PDAs and Mobile Comminicators
August 2001
ORDERING NUMBERS: L5971 (Minidip)
L5971D (SO16)
L5971
1.5A STEP DOWN SWITCHING REGULATOR
Minidip
SO16W
D98IN832C
5(11)
2(3)
8(14)
4(5,6)
1(2)
L5971
C1
47F
30V
C8
330
F
VO=2.5V/1.5A
Vi=6V to 28V
R1
22K
C2
1.2nF
R2
9.1K
C4
22nF
3(4)
7(13)
L1
30
H
6(12)
D1
STPS
3L40U
C5
47nF
C6
100nF
R3
R4
TYPICAL APPLICATION CIRCUIT
1/11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L5971D013TR | 制造商:STMicroelectronics 功能描述: |
| L5972 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2A SWITCH STEP DOWN SWITCHING REGULATOR |
| L5972D | 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 |
| 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 |
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