SP6231
SP6231 is 500mA / 3.3V Linear Regulator with Auxiliary Backup manufactured by Sipex.
FEATURES
- “Tiny” DFN Package Offers Excellent Thermal Characteristics (also available in NSOIC)
- “Glitch Free” Transition between Two Supplies
- 3.3V Fixed LDO Output Voltage
- 400µA Quiescent Current @500m A Load
- Fast Transient Response
- Current Limit Protection
- Thermal Shutdown Protection with Hysteresis
- Auxiliary Supply Control
- Internal 0.2Ω PFET Switch Eliminates External FETs
- Kelvin Connection with 3.3V Feedback
V SENSE 1 VIN 2 VOUT 3 VAUX 4
8 GND
8 Pin NSOIC
7 GND 6 GND 5 GND
Now Available in Lead Free Packaging
APPLICATIONS
- USB Peripherals
- NIC Cards
- PCMCIA/PCI Cards
- Desktop puters
- Dual Power Systems
DESCRIPTION
The SP6231 is a 500m A, 3.3V LDO with an integrated auxiliary voltage input switch. During normal operation, the SP6231 acts as a standard LDO with an output voltage of 3.3V delivering up to 500m A. When the 5V input drops below 4.4V, the 3.3V, VAUX input is switched to the output through an internal PFET, maintaining a constant “glitch free” output voltage. The SP6231 is ideally suited for NIC cards and portable battery powered equipment. When a desktop puter reverts to sleep mode, its 5V bus is removed, leaving only the 3.3V bus. The SP6231’s auxiliary output passes the 3.3V bus through, keeping the NIC card available for any Wake-On-LAN mand. In battery powered applications, the SP6231 draws power from any available 5V USB connection and reverts to battery power when the USB power is removed. TYPICAL APPLICATION CIRCUIT
+5V USB C1 2.2µF +3.3VAUX C2 2.2µF GND GND VAUX OUT C3 10µF GND VOUT 3.3V @ 500m A VIN
VSENSE
Date: 5/25/04
SP6231 500m A, 3.3V Linear Regulator
© Copyright 2004 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS
VIN 0.3V to 7V VOUT 0.3V to 6V VAUX...
