Product overview
Description
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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All features
- 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.
Circuit Diagram
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L4975A
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L4975A | NRND | MW 15L | Industrial | Ecopack1 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L4975A | | | distributors No availability of distributors reported, please contact our sales office |
L4975A NRND
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors