Datasheet Analog Devices MAX1951 — 数据表

19-2622; Rev 2; 6/09 1MHz, All-Ceramic, 2.6V to 5.5V Input,
2A PWM Step-Down DC-to-DC Regulators
The MAX1951/MAX1952 high-efficiency, DC-to-DC
step-down switching regulators deliver up to 2A of output current. The devices operate from an input voltage
range of 2.6V to 5.5V and provide an output voltage
from 0.8V to VIN, making the MAX1951/MAX1952 ideal
for on-board postregulation applications. The MAX1951
total output error is less than 1% over load, line, and
temperature.
The MAX1951/MAX1952 operate at a fixed frequency of
1MHz with an efficiency of up to 94%. The high operating
frequency minimizes the size of external components.
Internal soft-start control circuitry reduces inrush current.
Short-circuit and thermal-overload protection improve
design reliability.
The MAX1951 provides an adjustable output from 0.8V
to VIN, whereas the MAX1952 has a preset output of
1.8V. Both devices are available in a space-saving 8-pin
SO package. Features
♦ Compact 0.385in2 Circuit Footprint
♦ 10µF Ceramic Input and Output Capacitors, 2µH
Inductor for 1.5A Output
♦ Efficiency Up to 94% …