California Micro Devices CMPWR130 Datasheet

CALIFORNIA MICRO DEVICES

T

S

ON

r

s

ubes

CMPWR130

300mA SmartORTM Regulator with V

Features

• Automatic detection of VCC input supply

• Glitch-free output during supply transitions

• Built-in hysteresis during supply selection

• 300mA output maximum load current

• Overload current protection

• Short circuit current protection

• Operates from either V

• 8-pin SOIC package

Product Description

The SmartORTM CMPWR130 is a low dropout regulator
that delivers up to 300mA of load current at a fixed 3.3V
output. An internal threshold level (TYP 4.1V) is used to
prevent the regulator from being operated below dropout
voltage. The device continuously monitors the input
supply and will automatically disable the regulator when

falls below the threshold level. When the regulator is

V

CC

disabled, the control signal “Drive” (Active Low) is
enabled, which allows an external PMOS switch to
power the load from an auxiliary 3.3V supply.

CC

or V

OUT

Drive

AUX

Applications

• PCI adapter cards

• Network Interface Cards (NIC’s)

• Dual power systems

• Systems with standby capabilities

When VCC is restored to a level above the select thresh­old, the control signal for the external PMOS switch is
disabled and the regulator is once again enabled.

All the necessary control circuitry needed to provide a
smooth and automatic transition between the supplies
has been incorporated. This allows V
switched without loss of output voltage.

to be dynamically

CC

PIN DIAGRAM AND APPLICATION CIRCUI

Top View

81

CC

NC 72

NC 63

GND 5

4

CMPWR130

8-Pin SOIC

DRIVEV

V

V

NC

OUT

OUT

Pin Diagram

TANDARD PART ORDERING INFORMATI

Package Ordering Part Numbe

Pin

8 SOIC CMPWR130S/T CMPWR130S/R CMPWR130S

© 2001 California Micro Devices Corp. All rights reserved. SmartOR™ is a trademark of California Micro Devices Corp

215 Topaz Street, Milpitas, California 95035  Tel: [phone] Fax: [phone] www.calmicro.com

3/5/2001

Style T

MGSF1PO2ELT1

+

V

AUX

3.3V

–

GND

V

CC

+

5V

–

C

+

IN

1µF

CMPWR130

V

CC

DRIVE

GND

V

OUT

V

OUT

3.3V

300mA

+

C

OUT

4µF

GND

Typical Application Circuit

Tape & Reel Part Marking

C1670101

1

CALIFORNIA MICRO DEVICES

GS

g

Unit

)

000

O

S

Unit

CC

5 0.5

CS

)

C

UNIT

0

I

300

3.10

3.30

3.50

CMPWR130

ABSOLUTE MAXIMUM RATIN

Parameter Ratin

ESD Protection (HBM

,

V

V

CC

Voltages 6.0, GND –0.5 V

OUT

Drive Logic Voltage V
Temperature: Storage –40 to 150
Operating Ambient 0 to 70

Operating Junction 0 to 125
Power Dissipation

(Note 1)

0.6 W

2

+ 0.5, GND –0.5 V

CC

C

˚

C

˚

C

˚

PERATING CONDITION

Parameter Range

Temperature (Ambient) 0 to 70

C

˚

Load Current 0 to 300 mA

4.7 ± 20% µF

C

EXT

ELECTRICAL OPERATING CHARACTERISTI

(over operating conditions unless specified otherwise

Symbol Parameter

Regulator Output Voltage

OUT

V

CCSEL

V

CCDES

V

CCHYST

I

S/C

VCC Pin Reverse Leakage V

I

RCC

V

R LOAD

V

R LINE

Select Voltage Regulator Enabled 4.30 4.45 V

Deselect Voltage Regulator Disabled 3.90 4.10 V

Hysteresis Voltage Hysteresis

Short Circuit Output Current VCC = 5V, V

Load Regulation V

Line Regulation VCC = 4.5V to 5.5V, I

ICC Quiescent Supply Current V

V

V

Ground Current

I

GND

(Note 3)

V

V

Drive Pull-up Resistance R

R

OH

Drive Pull-down Resistance R

R

OL

Note 1: The power rating is based on a printed circuit board heat spreading capability equivalent to 2 square inches of copper connected to

Note 2: The hysteresis defines the maximum level of acceptable disturbance on V

Note 3: Ground pin current consists of controller current (0.15mA) and regulator current if enabled. The controller always draws 0.15mA

the GND pins. Typical multilayer boards using power plane construction will provide this heat spreading ability without the need for
additional dedicated copper area. (Please consult with factory for thermal evaluation assistance.)

source impedance be kept below 0.25Ω to ensure the switching disturbance remains below the hysteresis during select/deselect
transitions. An input capacitor may be required to help minimize the switching transient.

from either V
increase occurs due to current limit protection circuitry.

CC

or V

, whichever is greater. All regulator current is supplied exclusively from VCC. At high load currents a small

OUT

mA <

OUT

= 5V, I

CC

CC

CCDES

OUT

CCSEL

VCC

CC

PULLUP

PULLDOWN

onditions

<

LOAD

(Note 2)

mA

0.20 V

= 0V 310 mA

OUT

= 3.3V, VCC = 0V 2 50 µA

= 30 to 300mA 50 mV

LOAD

= 5mA 50 mV

LOAD

> V

, I

CCSEL

> VCC > V

= 0mA 0.6 0.8 mA

LOAD

0.2 mA

OUT

> VCC 0.01 0.02 mA

>

VCC (Regulator Disabled) 0.2 0.4 mA

= 5V, I

= 5V, I

to V

= 5mA 0.6 0.8 mA

LOAD

= 300mA 0.7 1.4 mA

LOAD

,

VCC > V

CC

to GND, V

CCDES

4.0 8.0 kΩ

CCSEL

> VCC 0.1 0.4 kΩ

during switching. It is recommended that the V

CC

CC

© 2001 California Micro Devices Corp. All rights reserved. SmartOR™ is a trademark of California Micro Devices Corp

215 Topaz Street, Milpitas, California 95035  Tel: [phone] Fax: [phone] www.calmicro.com

2

3/5/2001