AIC1531

500mA Dual Linear Regulator with Internal Power Switch

Continuous 3.3V Output from Three Inputs. AIC1531 is a dual input regulator with V

AUX

switch capable of delivering 3.3V/500mA continuously. The output power is provided from three independent input voltage sources on a prioritized basis. Power is always taken in priority using the following order V Complete Power Management Solution. V

CC

, V

SBY

Regulator Supplies 500mA Output. Built-in Hysteresis When Selecting Input Supplies. Integrated Switch has Very Low R

DS(ON)

120m Ω (typ.). Integrated Switch Supplies 500mA From V

AUX

.

CC

, V

SBY

, and V

AUX

. The AIC1531 meets Intel’s “ Instantly Available ” power requirements, which follows the “Advanced Configuration and Power Interface“ (ACPI) standards. When either V Output can be Forced Higher than Input (Off-State).

CC

or V Desktop Computers.

is present, the device automatically enables the regulator and produces a stable 3.3V output V PCI Adapter Cards with Wake-On-LAN. Network Interface Cards (NICs).

OUT

. When only V Ω typ.) from V

AUX

(3.3V) is present, the device provides a low impedance direct connection (120m Multi Power System. System with Standby Capabilities.

AUX

to V

OUT

. The AIC1531 also prevents excessive current from flowing V

OUT

to either input voltage or ground when the output voltage is higher than the input voltage. All the necessary control circuitry needed to provide a smooth and automatic transition between all the three supplies has been incorporated. This allows both V

CC

and V

SBY

to be dynamically switched without loss of output voltage.

Dual Input Regulator with Auxiliary Power Switch

Analog Integrations Corporation Si-Soft Research Center DS-1531G-01 121808 3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw

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