产品概述
描述
The L4972A is a stepdown monolithic power switching regulator delivering 2A at a voltage variable 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 microprocessors, 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 frequencies up to 200KHz allows reduction in the size and cost of external filter component.-
所有功能
- PWM LATCH FOR SINGLE PULSE PER PERIOD
- UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
- SWITCHING FREQUENCY UP TO 200KHz
- VERY HIGH EFFICIENCY
- CONTINUOUS MODE OPERATION
- THERMAL SHUTDOWN
- RESET AND POWER FAIL FUNCTIONS
- PRECISE 5.1V ± 2% ON CHIP REFERENCE
- 2A OUTPUT CURRENT
- 0 TO 90% DUTY CYCLE RANGE
- 5.1V TO 40V OUTPUT VOLTAGE RANGE
- INTERNAL CURRENT LIMITING
- INPUT/OUTPUT SYNC PIN
- INTERNAL FEED-FORWARD LINE REG.
电路原理图
精选 视频
All resources
| Resource title | Latest update |
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产品规格 (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 19 Sep 2016 |
19 Sep 2016
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技术文档 (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 20 Jan 2020 |
20 Jan 2020
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Design Notes & Tips (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 16 Jul 2019 |
16 Jul 2019
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手册 (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 23 Mar 2020 |
23 Mar 2020
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EDA Symbols, Footprints and 3D Models
STMicroelectronics - L4972
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Symbols
Footprints
3D models
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| L4972A |
批量生产
|
PDIP 20 | 工业 | Ecopack1 |
|
| L4972AD |
批量生产
|
SO-20 | 工业 | Ecopack1 (*) | |
| L4972AD013TR |
批量生产
|
SO-20 | 工业 | Ecopack1 (*) |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| L4972A | 3 distributors | Free Sample Buy Direct |
批量生产
|
EAR99 | NEC | Tube | PDIP 20 | - | - | MALAYSIA | 2.033 / 1k | |
| L4972AD | 4 distributors | Buy Direct |
批量生产
|
EAR99 | NEC | Tube | SO-20 | - | - | MALAYSIA | 2.033 / 1k | |
| L4972AD013TR | 无法联系到经销商，请联系我们的销售办事处 | Buy Direct |
批量生产
|
EAR99 | NEC | Tape And Reel | SO-20 | - | - | MALAYSIA | 2.033 / 1k | |
