Maxim Integrated MAX8508ETE

Description
The MAX8506/MAX8507/MAX8508 are integrated PWM step-down DC-DC regulators with a 75mΩ bypass FET designed to power the PA in WCDMA and cdmaOne cell phones. They operate with a supply voltage range of 2.6V to 5.5V and provide a guaranteed output current of 600mA. The 1MHz PWM switching frequency allows for small external components. The MAX8506 and MAX8507 are dynamically controlled to provide varying output voltages from 0.4V to 3.4V, while the MAX8508 is externally programmed for fixed 0.75V to 3.4V output. Digital logic enables a high-power (HP) bypass mode that connects the output directly to the battery for all versions. The MAX8506/MAX8507/MAX8508 are designed to settle in less than 30us for a full-scale change in output voltage and load current. They are available in 16-pin 4mm x 4mm thin QFN packages with a maximum height of 0.8mm.

Features
Integrated 75mΩ (typ) bypass FET
38mV dropout at 600mA load
Up to 94% efficiency
Dynamically adjustable output from 0.4V to 3.4V (MAX8506, MAX8507)
Externally fixed output from 0.75V to 3.4V (MAX8508)
1MHz fixed-frequency PWM switching
600mA guaranteed output current
Shutdown mode: 0.1μA (typ)
16-pin thin QFN (4mm x 4mm, 0.8mm max height)

Applications
WCDMA/NCDMA cell phones
Wireless PDAs, palmtops, and notebook computers
Wireless modems