MOTOROLA MC33565DR2, MC33565D Datasheet



SEMICONDUCTOR

TECHNICAL DATA

200 mA INTELLIGENT LDO

REGULATOR WITH SMART

BYPASS CONTROL

Order this document by MC33565/D

D SUFFIX

PLASTIC PACKAGE

CASE 751–06

(SO–8)

Pins 2 and 5 Not Connected

8

1

+5 V

in

N/C

+3.3 V

in

Gnd

Drive out
+3.3 V

out

Sense in
N/C

1
2
3
4

8
7
6
5

MC33565

Device Type Package

ORDERING INFORMATION

MC33565D

3.3V

SO–8

1

MOTOROLA ANALOG IC DEVICE DATA

   
  

The MC33565 Low Dropout Regulator is designed for computer

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.

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. 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:

• Output Regulated to 2% Over Temperature

• Output current up to 200mA

• Excellent Line and Load Regulation

• Low Dropout V oltage

• 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)

Simplified Block Diagram

V

ref

Compensation

&

Hysteresis

+5 Vin

Ref &

Detect

5V detect

Comp
Driver

Drive out

+3.3 Vout

Sense in

+3.3 Vin

Hyst sw

External
P–channel
MOSFET

+3.3 Vout

External

4.7

µ

F

cap

LDO

 Motorola, Inc. 1999 Rev 0, 6/99

MC33565

2

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

(TC = 25°C, unless otherwise noted)

Parameter Symbol Max Value Unit

Input Voltage, V

CC

V

max

7.0 Vdc

V

min

–0.5 Vdc

Operating Ambient Temperature T

a

–5 to +70 °C

Operating Junction Temperature T

J

– 5 to +150 °C

Lead Temperature (Soldering, 10 seconds) T

L

300 °C

Storage Temperature Range T

stg

– 55 to +150 °C

Package Thermal Resistance, Junction to Ambient R

θJA

1

180 °C/W

NOTES: 1. Mounted on recommended minimum PCB pad on FR4, 2–oz. copper circuit board.

AC ELECTRICAL SPECIFICATIONS

(3) (4)

Parameter Symbol Min Typ Max Unit

Drive High Delay (Vin ramping up)

C

Drive

= 1.2 nF, measured from +5 Vin = V

thresHi

to V

Drive

= 2V

t

DH

0.5 3.5 µS

Drive Low Delay (Vin ramping down)

C

Drive

= 1.2 nF, measured from +5 Vin = V

thresLo

to V

Drive

= 2V

t

DL

0.5 3.5 µS

NOTES: (1.) See 5V Detect Thresholds Diagram.

(2.) Recommended source impedance for 5V supply: ≤ 0.25W. This will ensure that Io x R

source

< V

hyst

, thus avoiding

driveout toggling during 5V detect threshold transitions.
(3.) See Figure 2. Application Block Diagram.
(4.) See Timing Diagram.

PIN ASSIGNMENTS AND FUNCTIONS

PIN # PIN NAME PIN DESCRIPTION

1 +5 V

in

This is the input supply for the IC. Typical voltage 5 V.

(1) (2)

2,5 N/C Reserved

3 +3.3 V

in

Auxiliary input. Typical voltage 3.3 V.
4 Gnd Logic and Power Gnd.
6 Sense in Load–sense voltage input to internal regulator.
7 +3.3 V

out

3.3V output provided to the application circuit (output current is sourced to this pin from the 5V input.)

8 Drive out

This output drives a P–channel MOSFET with up to 2000pF of “effective” gate capacitance.

Recommended device is MGSF1P02EL T MOSFET. Drive out has active internal pull–up and
pull–down circuitry to guarantee fast transitions.

DEVICE MARKING

Device Type Sub–type Marking (1st Line)

MC33565D 3.3 V MC565

MC33565

3

MOTOROLA ANALOG IC DEVICE DATA

DC ELECTRICAL CHARACTERISTICS

(1)

Characteristic Symbol Min Typ Max Unit

+5 Vin Supply Voltage Range +5 V

in

4.3 5.0 5.5 Vdc

Reverse Leakage Current from Output I

reverse

— — 25 µA

V

Aux

quiescent current — — 3.0 mA

+5 Vin quiescent current, operating — — 10 mA
Load Capacitance

(2)

C

load

4.7 22 —

m

F

REGULATOR OUTPUT

Output Voltage

(4.3V ≤ Vin ≤ 5.5V , 0mA ≤ Io ≤ 200mA) TA = 25°C
(TA = –5°C to 150°C)

+3.3 V

out

3.267

3.234

3.30

3.30

3.333

3.366

Vdc

In–to–Out Voltage

(3.9V ≤ Vin ≤ 4.3V , V

aux

= 3.3V)

V

d

3.0 — — Vdc

Voltage Out at Max Voltage In

(Vin = 7V)

V

outmax

3.1 3.3 3.5 Vdc

Line Regulation

(Io = 200 mA)

— — 0.4 %

Load Regulation

(Io = 0 to 200 mA)

— — 0.4 %

5V DETECT

Low Threshold Voltage

(+5 Vin falling)

V

thresLo

3.9 4.05 4.3 Vdc

High Threshold Voltage

(+5 Vin rising)

V

thresHi

— 4.2 4.3 Vdc

Hysteresis V

Hyst

0.12 0.15 0.18 Vdc

DRIVE OUTPUT

Output peak source Current

(+5 Vin > V

thresHi

)

I

peak

15 — — mA

Output peak sink Current

(+5 Vin < V

thresLo

)

I

peak

15 — — mA

Low Output Voltage

(IoL = 200 µA, Vin < V

thresLo

)

V

oL

— 100 200 mVdc

High Output Voltage

(IoH = 200 µA)

V

oH

3.4 V5–0.8 — Vdc

NOTE: 1. (–5°C<Ta<70°C, 4.3V<5V<5.5V , C

load

= 4.7µF unless otherwise noted)

NOTE: 2. 4.7µF minimum over temperature; 22µF recommended; 500mW ESR maximum.