The AT73C237 has a similar architecture to the established AT73C239 PMU, but supports a 5V supply. It integrates four Linear Low Drop Out (LDO) Regulators, three of which provide the high-accuracy supply (programmable from 1.2V to 2.75V) required by RF and analog devices, and one 1.8V regulator for backup battery/capacitor recharging. It integrates a Two Wire Interface (TWI) to allow a microcontroller to program the variable LDO output voltages and manage the enable of each LDO.
 
“A number of customers have appreciated using the AT73C239 and many of them have requested a direct 5V input. The AT73C237 was designed to answer this requirement,” said Michele Casetta, marketing manager for Atmel 's Power Management And Analog Companions (PMAAC) Product Line.
 
"A 3mm x 3mm QFN package integrating a four-channel power supply is a major differentiator in the market and today customers can connect the application supply (Li-Ion battery, AC/DC input, USB port, etc.) directly to the AT73C237, thereby increasing the level of analogue integration, and minimizing the BOM cost and product size.

"The AT73C237 is a universal PMU. Its small package and high integration means the AT73C237 can be used in a large number of applications from portable devices to PC peripheral boards, from wireless chipset supply - such as GPS and Bluetooth - to Ethernet-powered devices,” said Michele Casetta.
 
Pricing and availability
Atmel offers the AT73C237 in a 3 x 3mm, 16-pin QFN package priced at US$0.65 in quantities of 100,000 units. It is available now mounted on a reference design board or as engineering samples.

More information: www.atmel.com