ST1534A Datasheet PDF | STMicroelectronics

STMicroelectronics ST1534A

The ST1534A is intended for application such as power managed PCI and network interface cards (NICs), where operations from 3.3V VAUX supply SCHEMATIC DIAGRAM VIN may be required when the 5V supply has been shut down. When the 5V VAUX is available, the IC connects this supply directly to its output using an external P-Channel FET. This ensures an uninterrupted 3.3V out even if VIN falls out of specification.

Part No.	ST1534A
Datasheet	ST1534A Download
Manufacturer	STMicroelectronics
Description	SMART LDO
Buy	Stock & Price

APPLICATIONS

s s s s NETWORK INTERFACE CARDS PCMCIA/PCI INTERFACE CARDS DESKTOP COMPUTERS POWER SUPPLY WITH MULTIPLE INPUT SOURCES

DESCRIPTION

During regular operation, 3.3V power for the PCI card is provided by the internal LDO regulator, generated from 5V supply. When both supplies are available simultaneously, the drive pin DR will be pulled high, turning off the PMOS switch. The device is available in the popular 5 leads P2PAK and PPAK + 5V Detect DR Rpull_down VIN Reference + - Error Amp VOUT GND April 2003 1/15 ST1534A

ABSOLUTE MAXIMUM RATINGS

Symbol VI VSHDN IO Tstg Top DC Input Voltage Shutdown Input Voltage Output Current Storage Temperature Range Operating Junction Temperature Range Parameter² Value -0.3 to 7 -0.3 to 7 Internally limited -40 to +125 0 to +85 Unit V V mA °C °C

ABSOLUTE MAXIMUM RATINGS

are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. THERMAL DATA Symbol Rthj-case Rthj-amb Parameter Thermal...