MC33565 Motorola, MC33565 Datasheet

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MC33565

Manufacturer Part Number
MC33565
Description
200 mA INTELLIGENT LDO REGULATOR WITH SMART BYPASS CONTROL
Manufacturer
Motorola
Datasheet

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Smart Voltage Regulator for
Peripheral Card Applications
peripheral card applications complying with the instantly available
requirements as specified by ACPI objectives. The MC33565 permits
glitch–free transitions from “sleep” to “active” system modes and has internal
logic circuitry to detect whether the system is being powered from the
motherboard main 5V power supply or the 3.3V aux supply.
internal low drop out 5.0V–to–3.3V voltage regulator or an external P–channel
MOSFET, depending on the operating status of the system in which the card is
installed. During normal operating mode (5V main supply available) the 3.3V
output is provided from the internal low dropout regulator at an output current
of 200mA. When the motherboard enters sleep mode, the MC33565 operates
from the 3.3V aux supply and routes the aux current to the output via the
external P–channel MOSFET bypass transistor controlled by the drive out pin.
As a result, the output voltage provided to the peripheral card remains
constant at 3.3V even during transitions to and from sleep mode.
MC33565 Features:
MOTOROLA ANALOG IC DEVICE DATA
The MC33565 Low Dropout Regulator is designed for computer
The MC33565 provides a regulated output voltage of 3.3V via either an
Output Regulated to 2% Over Temperature
Output current up to 200mA
Excellent Line and Load Regulation
Low Dropout Voltage
Prevents reverse current flow during sleep mode
Glitch–free transfer from sleep mode to active mode
Compatible with Instantly Available PC systems
Evaluation Kit Available: (P.N. MC33565EVK)
+5 Vin
+3.3 Vin
LDO
Detect
Ref &
Compensation
V ref
Hysteresis
Simplified Block Diagram
&
5V detect
Comp
Driver
Hyst sw
Drive out
+3.3 Vout
Sense in
External
P–channel
MOSFET
+3.3 Vout
External
4.7 F
cap
Motorola, Inc. 1999
MC33565D
REGULATOR WITH SMART
Device
200 mA INTELLIGENT LDO
+3.3 V in
ORDERING INFORMATION
BYPASS CONTROL
+5 V in
Gnd
N/C
MC33565
Pins 2 and 5 Not Connected
SEMICONDUCTOR
TECHNICAL DATA
Order this document by MC33565/D
PLASTIC PACKAGE
1
2
3
4
CASE 751–06
8
D SUFFIX
(SO–8)
MC33565
Type
3.3V
1
8
7
6
5
Drive out
+3.3 V out
Sense in
N/C
Package
SO–8
Rev 0, 6/99
1

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MC33565 Summary of contents

Page 1

... The MC33565 provides a regulated output voltage of 3.3V via either an internal low drop out 5.0V–to–3.3V voltage regulator or an external P–channel MOSFET, depending on the operating status of the system in which the card is installed ...

Page 2

... This output drives a P–channel MOSFET with up to 2000pF of “effective” gate capacitance. 8 Drive out Recommended device is MGSF1P02ELT MOSFET. Drive out has active internal pull–up and pull–down circuitry to guarantee fast transitions. DEVICE MARKING Device MC33565D 2 MC33565 Symbol V max V min stg ...

Page 3

... V in < V thresLo ) Low Output Voltage ( 200 < V thresLo ) High Output Voltage ( 200 A) NOTE: 1. (–5 C<T a <70 C, 4.3V<5V<5.5V, C load = 4.7 F unless otherwise noted) NOTE: 2. 4.7 F minimum over temperature recommended; 500m MOTOROLA ANALOG IC DEVICE DATA MC33565 (1) Symbol + reverse C load +3.3 V out V d ...

Page 4

... Drive out +5 Vin 1 8 +3.3 Vout N MC33565 Sense in +3.3 Vin 3 6 Gnd N Figure 2. Application Block Diagram External P–channel MOSFET +3 ...

Page 5

... Frequency (Hz) NOTE: V out capacitor 4.7 F over operating temperature range. W Maximum ESR permissable = 500m over operating temperature range. Figure 5. Predicted Gain and Phase at Zero Load Current MOTOROLA ANALOG IC DEVICE DATA MC33565 4.4V V HYST VIN 3. 2.0V DR 2.0V NOTE: (1) VIN rise and fall times (10 100ns. ...

Page 6

... SEATING PLANE MC33565 OUTLINE DIMENSIONS D SUFFIX PLASTIC PACKAGE CASE 751–06 (SO–8) ISSUE T NOTES 0.10 MOTOROLA ANALOG IC DEVICE DATA 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. DIMENSIONS ARE IN MILLIMETER. ...

Page 7

... MOTOROLA ANALOG IC DEVICE DATA MC33565 NOTES 7 ...

Page 8

... Motorola, Inc. Motorola, Inc Equal Mfax is a trademark of Motorola, Inc. JAPAN: Motorola Japan Ltd.; SPD, Strategic Planning Office, 141, 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan. 81–3–5487–8488 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 852–26629298 MOTOROLA ANALOG IC DEVICE DATA MC33565/D ...

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