Product Summary

The LM2676SX-3.3 is a monolithic integrated circuit which provides all of the active functions for a step-down (buck) switching regulator capable of driving up to 3A loads with excellent line and load regulation characteristics. High efficiency (>90%) of the LM2676SX-3.3 is obtained through the use of a low ON-resistance DMOS power switch. The LM2676SX-3.3 consists offixed output voltages of 3.3V, 5V and 12V and an adjustableoutput version. The applications of the LM2676SX-3.3 include: imple to design, high efficiency ( >90%) step-down switching regulators, Efficient system pre-regulator for linear voltage regulator, Battery chargers.

Parametrics

LM2676SX-3.3 absolute maximum ratings: (1) Input Supply Voltage; (2) ON/OFF Pin Voltage: -0.1V to 6V; (3) Switch Voltage to Ground: -1V to Vin; (4) Boost Pin Voltage: Vsw to +8V; (5) Feedback Pin Voltage: -0.3V to 14V; (6) Power Dissipation: Internally Limited; (7) ESD: 2kV; (8) Storage Temperature Range: -65°C to 150°C; (9) Wave: 4sec,260°C; (10) Infrared: 10 sec, 240°C; (11) Vapor Phase: 75 sec, 219°C.

Features

LM2676SX-3.3 features: (1) Efficiency up to 94%; (2) Simple and easy to design with (using off-the-shelfexternal components) ; (3) 150 mΩ DMOS output switch; (4) 3.3V, 5V and 12V fixed output and adjustable (1.2V to37V ) versions; (5) 50μA standby current when switched OFF; (6) ±2% maximum output tolerance over full line and load conditions; (7) Wide input voltage range: 8V to 40V; (8) 260 KHz fixed frequency internal oscillator; (9) -40 to +125°C operating junction temperature range.

Diagrams

LM2676SX-3.3 Block Diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LM2676SX-3.3
LM2676SX-3.3

National Semiconductor (TI)

Switching Converters, Regulators & Controllers

Data Sheet

0-500: $1.78
500-1000: $1.43
1000-5000: $1.37
LM2676SX-3.3/NOPB
LM2676SX-3.3/NOPB

National Semiconductor (TI)

Switching Converters, Regulators & Controllers HIGH EFF 3A STEP- DOWN VLTG REG

Data Sheet

0-1: $3.01
1-25: $2.42
25-100: $2.20
100-250: $1.99
250-500: $1.78