LM2678T-5.0/NOPB High EFF 5A VLTG REG Step Down Voltage Regulator Through Hole Mounting
microchip battery management
,power management integrated circuit
LM2678T-5.0/NOPB Power Path Management IC Switching Voltage Regulators HIGH EFF 5A STEP- DOWN VLTG REG
1 Features
- Efficiency Up to 92%
-
Simple and Easy to Design Using Off-the-Shelf
External Components
-
120-mΩ DMOS Output Switch
-
3.3-V, 5-V, and 12-V Fixed Output and Adjustable (1.2 V to 37 V) Versions
-
50-μA Standby Current When Switched OFF
-
±2% Maximum Output Tolerance Over Full Line
and Load Conditions
-
Wide Input Voltage Range: 8 V to 40 V
-
260-kHz Fixed Frequency Internal Oscillator
-
−40 to 125°C Operating Junction Temperature Range
-
Create a Custom Design Using the LM2678 With the WEBENCH® Power Designer
2 Applications
-
Simple-to-Design, High Efficiency (>90%) Step- Down Switching Regulators
-
Efficient System Preregulator for Linear Voltage Regulators
-
Battery Chargers
3 Description
The LM2678 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 5-A 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 series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version.
The SIMPLE SWITCHER® concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260 kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2678 are available from several manufacturers to greatly simplify the design process.
The LM2678 series also has built-in thermal shutdown, current limiting, and an ON/OFF control input that can power down the regulator to a low 50- μA quiescent current standby condition. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.
Device Information
|
PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
|
LM2678 |
TO-263 (7) |
10.10 mm × 8.89 mm |
|
TO-220 (7) |
14.986 mm × 10.16 mm |
|
|
VSON (14) |
6.00 mm × 5.00 mm |
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