CS5233-3 Datasheet, PDF (1/12 Pages) ON Semiconductor – 500 mA and 1.5 A, 3.3 V Dual Input Linear Regulator with Auxiliary Control

CS5233−3
500 mA and 1.5 A, 3.3 V
Dual Input Linear Regulator
with Auxiliary Control
The CS5233−3 provides a glitch−free 3.3 V output from one of three
possible supplies, (V_IN, V_SB and 3.3 V_AUX). An on−chip linear
regulator powers the output when either V_IN or V_SB is available.
Otherwise AuxDrv turns on an external PFET, which connects the
3.3 V_AUX supply to the output. The CS5233−3 is intended to provide
power to an ASIC on a PCI Network Interface Card (NIC), and meets
Intel’s “Instantly Available” power requirements which follow from
the Advanced Configuration and Power Interface (ACPI) standards.
Other applications include desktop computers, power supplies with
multiple input sources, and PCMCIA interface cards.
The CS5233−3 linear regulator provides a fixed 3.3 V output at up
to 1.5 A with an overall accuracy of ±2%. The internal NPN − PNP
composite pass transistor provides a low dropout voltage and requires
less supply current than a straight PNP design. Full protection with
both current limit and thermal shutdown is provided. Designed for low
reverse current, the IC prevents excessive current from flowing from
V_OUT to either V_IN or ground when the regulator input voltage is
lower than the output. The auxiliary drive control feature allows the
use of an external PFET to supply power to the output when the
regulator supplies are off.
The CS5233−3 regulator is available in two package types: the 5
Lead D²PAK package (TO−263) and SOIC−8 with 4 Lead Fused
(DF8) package. When powered from the V_IN source, the D²PAK−5 is
rated for 1.5 A and the SOIC−8 is rated for 500 mA. Both packages are
rated for 500 mA when only powered from the V_SB source.
Features
• Linear Regulator
− 3.3 V ± 2% Output Voltage
− Current Limit
− Thermal Shutdown with Hysteresis
− 400 mA Reverse Current
− ESD Protected
• System Power Management
− Auxiliary Supply Control
− “Glitch Free” Transition Between 3 Sources
− Similar to CS5231−3
• High Output Current Capability
− 1.5 A D²PAK−5
− 500 mA SOIC−8 DF8
• Internally Fused Leads in SOIC−8 Package
http://onsemi.com
1
5
8
1
D²PAK−5
DP SUFFIX
CASE 936AC
SOIC−8
D SUFFIX
CASE 751
PIN CONNECTIONS AND
MARKING DIAGRAMS
CS5233−3
AWLYWW
1
Pin 1. V_SB
2. V_IN
3. GND
4. V_OUT
5. AuxDrv
1
V_SB
V_IN
V_OUT
AuxDrv
8
GND
GND
GND
GND
A
WL, L
YY, Y
WW, W
= Assembly Location
= Wafer Lot
= Year
= Work Week
ORDERING INFORMATION
Device
Package
Shipping^†
CS5233−3GDP5 D²PAK−5
50 Units/Rail
CS5233−3GDPR5 D²PAK−5
CS5233−3GDF8 SOIC−8
750 Tape & Reel
95 Units/Rail
CS5233−3GDFR8 SOIC−8 2500 Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2004
1
January, 2004 − Rev. 6
Publication Order Number:
CS5233−3/D