-
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.
主要特性
- 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.
下载 
精选 视频
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 | 封装 | 包装类型 | 供货状态 | ECCN (US) | Country of Origin | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|
| L4972A | 4 distributors | 获取样片 | PDIP 20 | Tube | 批量生产 | EAR99 | MALAYSIA | 2.033 / 1k | |
| L4972AD | 6 distributors | 立即购买 | SO-20 | Tube | 批量生产 | EAR99 | MALAYSIA | 2.033 / 1k | |
| L4972AD013TR | 2 distributors | 获取样片 | SO-20 | Tape And Reel | 批量生产 | EAR99 | MALAYSIA | 2.033 / 1k |
