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MC33565DMR2 View Datasheet(PDF) - ON Semiconductor

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MC33565DMR2 Datasheet PDF : 12 Pages
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MC33565
Smart Voltage Regulator for
Peripheral Card Applications
The MC33565 Low Drop Out Voltage Regulator is designed for
computer peripheral card applications, allowing glitch–free transitions
from “sleep” to “active” system modes. It has internal logic circuitry
to detect whether there is a 5.0 V supply (“active” system mode) or an
auxiliary 3.3 V supply (“sleep” system mode). A guaranteed 3.3 V
regulated output voltage at 200 mA is always available even if the
main 5.0 V supply drops out.
The regulated 3.3 V output voltage is provided by either an internal
low dropout voltage regulator or an external P–channel MOSFET
switch, depending on the system being in the “active” or “sleep”
mode.
Features
Glitch–Free Transition from “Sleep” to “Active” Mode
Compatible with Instantly Available PC Systems
Output Current up to 200 mA
Output Regulated to 2% over Temperature
Excellent Line and Load Regulation (0.4%)
Prevents Reverse Current Flow during Sleep Mode
Short Circuit Protection
Applications
Computer
Ethernet
PCI/NIC Cards
Main
5.0 V Input
3.3 V
Auxiliary
Input
Low Voltage
Detector
Reference
Regulator
3.3 V/200 mA
Ground
Switch
Drive
G
D
External
P–Channel
MOSFET
S
Regulator
Output
Sense Input
3.3 V
Load
Figure 1. Simplified Block Diagram
http://onsemi.com
MARKING
DIAGRAMS
8
1
SOIC–8
D SUFFIX
CASE 751
MC565
ALYW
8
1
Micro8t
(MSOP–8)
DM SUFFIX
CASE 846A
M565
ALYW
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
PIN CONNECTIONS
Main Input 1
NC 2
Auxiliary Input 3
Gnd 4
8 Switch Drive
7 Regulator Output
6 Sense Input
5 NC
Pins 2 and 5 are not internally connected
ORDERING INFORMATION
Device
MC33565D
Package
SOIC–8
Shipping
98 Units / Rail
MC33565DR2
SOIC–8 2500 / Tape & Reel
MC33565DMR2 Micro8 2500 / Tape & Reel
© Semiconductor Components Industries, LLC, 2002
1
March, 2002 – Rev. 6
Publication Order Number:
MC33565/D
 

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