Part Number: MAX746
Function: High-efficiency, PWM, step-down, N-channel DC-DC controller / Low 950µA Supply Current
Package: DIP, SOP 16 Pin
Manufacturer: Maxim Integrated
The MAX746 is a high-efficiency, high-current, step-down DC-DC power-supply controller that drives external N-channel FETs. It provides 93% to 96% efficiency from a 6V supply voltage with load currents ranging from 50mA up to 3A.
It uses a pulse-width-modulating (PWM) current-mode control scheme to provide precise output regulation and low output noise. The MAX746’s 4V to 15V input voltage range, fixed 5V/adjustable (Dual-ModeTM ) output, and adjustable current limit make this device ideal for a wide range of applications.
High efficiency is maintained with light loads due to a proprietary automatic pulse-skipping control (Idle-ModeTM) scheme that minimizes switching losses by reducing the switching fre
quency at light loads. The low 950µA quiescent current and ultra-low 1.4µA shutdown current further extend battery life.
1. 4V to 15V Input Voltage Range
2. Low 950μA Supply Current
3. 1.4μA Shutdown Current
4. Drives External N-Channel FETs
5. Fixed-Frequency Current-Mode PWM (Heavy Loads)
6. Idle-Mode PFM (Light Loads)
7. Cycle-by-Cycle Current Limiting
1. Notebook/Laptop Computers
2. Personal Digital Assistants
3. Battery-Operated Equipment
4. Cellular Phones
Other data sheets are available within the file:
MAX746C/D, MAX746CPE, MAX746CSE, MAX746EPE