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参数资料
| 型号： | L4972AD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | PLASTIC, SO-20 |
| 文件页数： | 1/22页 |
| 文件大小： | 1370K |
| 代理商： | L4972AD |
1/22
L4972A
May 2005
1
Features
■ 2A OUTPUT CURRENT
■ 5.1V TO 40V OUTPUT VOLTAGE RANGE
■ 0 TO 90% DUTY CYCLE RANGE
■ INTERNAL FEED-FORWARD LINE REG.
■ INTERNAL CURRENT LIMITING
■ PRECISE 5.1V ± 2% ON CHIP REFERENCE
■ RESET AND POWER FAIL FUNCTIONS
■ INPUT/OUTPUT SYNC PIN
■ UNDER VOLTAGE LOCK OUT WITH
HYSTERETIC TURN-ON
■ PWM LATCH FOR SINGLE PULSE PER
PERIOD
■ VERY HIGH EFFICIENCY
■ SWITCHING FREQUENCY UP TO 200KHz
■ THERMAL SHUTDOWN
■ CONTINUOUS MODE OPERATION
2
Description
The L4972A is a stepdown monolithic power
switching regulator delivering 2A at a voltage vari-
able from 5.1 to 40V.
Realized with BCD mixed technology, the device
uses a DMOS output transistor to obtain very high
efficiency and very fast switching times. Features
of the L4972 include reset and power fail for micro-
processors, feed forward line regulation, soft start,
limiting current and thermal protection. The device
is mounted in a Powerdip 16 + 2 + 2 and SO20
large plastic packages and requires few external
components. Efficient operation at switching fre-
quencies up to 200KHz allows reduction in the
size and cost of external filter component.
2A SWITCHING REGULATOR
Figure 2. Block Diagram
Rev. 3
Figure 1. Packages
Table 1. Order Codes
Part Number
Package
L4972A
DIP20 (16+2+20)
L4972AD
SO20
L4972AD013TR
SO20 in Tape & Reel
PowerDIP20 (16+2+2)
SO20
相关PDF资料 |
PDF描述 |
|---|---|
| L4972AD013TR | 3.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDSO20 |
| L4973D3.3 | 5.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO20 |
| L4973V3.3 | 5.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDIP18 |
| L4990D013TR | 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| L4990 | 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDIP16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L4972AD013TR | 功能描述:直流/直流开关调节器 5.1 to 40V 2.0 Amp 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 |
| L4972D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-Mode SMPS Controller |
| L4973 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.5A step down switching regulator |
| L4973D3 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR |
| L4973D3.3 | 功能描述:直流/直流开关调节器 3.3V 3.5A Step-Down 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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