LM2678 5V 5A Step-Down Voltage Regulator – Datasheet

The LM2678 regulator is a monolithic integrated circuit that provides all of the active functions for a stepdown (buck) switching regulator capable of driving up to 5A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The LM2678 consists of a fixed output voltage of 5V.

The LM2678 also has a built-in thermal shutdown, current limiting, and an ON/OFF control input that can power down the regulator to a low 50µA quiescent current standby condition. The output voltage is guaranteed to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

LM2678 Pinout

LM2678 Pin Configuration

Pin No	Pin Name	Description
1	SWITCH OUT	Switch Output Pin
2	IN	Input Pin
3	C BOOST	C Boost Pin
4	GND	Ground Pin
5	NC	No Connection
6	FEEDBACK	Feedback Pin
7	ON/OFF’	On/Complement Off Pin

LM2678 Key Features

• 120 mΩ DMOS output switch
• 3.3V, 5V and 12V fixed output and adjustable (1.2V to 37V ) versions
• 50µA standby current when switched OFF
• ±2%maximum output tolerance over full line and load conditions
• Wide input voltage range: 8V to 40V
• 260 KHz fixed frequency internal oscillator
• −40 to +125˚C operating junction temperature range

Application

• Simple to design, high efficiency (>90%) step-down switching regulators
• Efficient system pre-regulator for linear voltage regulators
• Battery chargers

You can download this datasheet for LM2678 5V 5A Step-Down Voltage Regulator – Datasheet from the link given below: