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The L4970A is a stepdown monolithic power switching regulator delivering 10A 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 L4970A 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 multi-watt plastic power package and requires few external components.
L4970 Pinout
L4970 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | ROS C | Resistor Operation Set Computing Pin |
| 2 | COS C | Capacitor Operation Set Computing Pin |
| 3 | RESET IN | Reset Input Pin |
| 4 | RESET OUT | Reset Output Pin |
| 5 | RESET DELAY | Reset Delay Input Pin |
| 6 | BOOTSTRAP | Bootstrap Pin |
| 7 | OUTPUT | Output Pin |
| 8 | GND | Ground Pin |
| 9 | Vi | Input Voltage |
| 10 | FRQ: COMPENSATION | Frequency Compensation Pin |
| 11 | FEEDBACK IN | Feedback Input Pin |
| 12 | SOFT START | Soft Start Pin |
| 13 | SYNC | Synchronous Pin |
| 14 | VREF 5.1V | Reference Voltage Pin 5.1 |
| 15 | V START | Start Voltage Pin |
L4970 Key Features
- 10A output current
- 5.1V To 40V output voltage range
- 0 TO 90% duty cycle range
- Internal Feed-Forward Line Regulation
- Internal Current Limiting
- Precise 5.1V ± 2% On Chip Reference
- Reset and Power Fail Functions Soft Start
You can download this datasheet for L4970A 10A Switching Regulator – Datasheet from the link given below:
