MC33567D-1 View Datasheet(PDF) - ON Semiconductor
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Description
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MC33567D-1 Datasheet PDF : 8 Pages
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MC33567
Advance Information
Dual Linear Controller for High
Current Voltage Regulation
The MC33567 Dual Linear Controller is designed for
motherboard/mainboard applications requiring reliable regulation of
high current supply planes. This advanced linear IC provides the
necessary drive, sense, and control signals to interface two separate
N–channel MOSFETs as individual series pass elements regulating
two different supply planes.
Use of this device lowers costs as well as ameliorates layout
problems on pc motherboard products. Additionally, an under
voltage–based short circuit detection and protection feature is
provided which places system operation into a protected mode
pending removal of the short.
Features
• Detects under voltage condition (short circuit condition) and places
regulation into a protective “hiccup” mode, thus preventing damage
and permitting recovery after short circuit condition is corrected
• Drive capability for SOT–223, DPAK, and D2PAK MOSFETs
• MC33567–1 controls two separate series pass transistors to provide
regulation for separate 1.5V and a 1.8V supply planes. MC33567–2
controls two separate series pass transistors to provide regulation for
separate 2.5V supply planes
http://onsemi.com
8
1
SO–8
D SUFFIX
CASE 751
PIN CONNECTIONS
1
Gate1 drv
2
Sense1
3
Shutoff1
4
GND
8
Vcc
7
Gate2 drv
MC33567 6
Sense2
5
Shutoff2
8
+12V
4
GND
3
SHDN1
5
SHDN2
Simplified Functional Block Diagram
BandGap REF
3.3V
+12V
66k
Vin Bypass On
Startup and
Overcurrent
Control
Control
BandGap REF
3.3V
+12V
66k
Startup and
Overcurrent
Control
REF
4.1V
Control
1
DRV1
2
SNS1
7
DRV2
6
SNS2
+3.3Vin
Vout1
+3.3Vin
Vout2
ORDERING INFORMATION
Device
Output
Voltage
Shipping
MC33567D–1 1.8V, 1.5/3.3V 98 Units/Rail
MC33567D–1R2 1.8V, 1.5/3.3V 2500 Tape&Reel
MC33567D–2
2.5V, 2.5V
98 Units/Rail
MC33567D–2R2 2.5V, 2.5V 2500 Tape&Reel
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
© Semiconductor Components Industries, LLC, 1999
1
January, 2000 – Rev. 0
Publication Order Number:
MC33567/D
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