产品概述
描述
The L4975A is a stepdown monolithic power switching regulator delivering 5A 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 L4975A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a 15-lead multiwatt plastic power package and requires few external components. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter component.
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所有功能
- UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
- INPUT/OUTPUT SYNC PIN
- VERY HIGH EFFICIENCY
- PWM LATCH FOR SINGLE PULSE PER PERIOD
- THERMAL SHUTDOWN
- SWITCHING FREQUENCY UP TO 500KHz
- CONTINUOUS MODE OPERATION
- RESET AND POWER FAIL FUNCTIONS
- PRECISE 5.1V ± 2% ON CHIP REFERENCE
- 5A OUTPUT CURRENT
- 0 TO 90% DUTY CYCLE RANGE
- 5.1V TO 40V OUTPUT VOLTAGE RANGE
- INTERNAL CURRENT LIMITING
- SOFT START
- INTERNAL FEED-FORWARD LINE REG.
电路原理图
EDA符号、封装和3D模型
STMicroelectronics - L4975A
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符号
封装
3D模型
样片和购买
| 产品型号 | Order from distributors | 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 | |||||||||||
| L4975A | distributors 无法联系到经销商，请联系我们的销售办事处 | NRND | EAR99 | NEC | Tube | MW 15L | - | - | MOROCCO | | ||