Champion CM2831 Service Manual

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CM2831

GENERAL DESCRIPTION

The CM2831 family is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (30µA typ.), low dropout voltage, and high output voltage accuracy, making them ideal for battery applications. EN input connected to CMOS has low bias current. The space-saving SOT-23-5 package is attractive for “Pocket” and “Hand Held” applications.

These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the “Worst” of operating conditions.

In application requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground.

The CM2831 is stable with an output capacitance of 2.2µF or greater.

APPLICATIONS

! Battery-powered devices ! Personal communication devices

!

Home electric/electronic appliances

! PC peripherals

300mA CMOS LDO W

FEATURES

! Very Low Dropout Voltage

!

Low Current Consumption: Typ. 30µA, Max. 35µA

! Output Voltage: 1.5V, 1.8V, 1.9V, 2.2V, 2.5V, 2.7V, 2.8V,

2.9V, 3.0V, 3.3V, 3.5V, 3.6V, and 3.8V

! High Accuracy Output Voltage: +/- 1.5% ! Guaranteed 300mA Output ! Input Range of 2.6V to 7.0V ! Thermal Shutdown ! Curre nt Limiting ! Compact Package: SOT-23-5

!

Factory Pre-set Output Voltages

! Short Circuit Current Fold-Back ! Low Temperature Coefficient

24 Hours Technical Support--WebSIM

Champion provides customers an online circuit simulation tool called WebSIM. You could simply logon our website at www.champion-micro.com for details.

ITH

TYPICAL APPLICATIONS

IN OUT

IN O UT

CM2831

BYP GND EN

E

NABLE

5V

2002/04/12

C1

1uF

Rev. 3

Champion Microelectronic Corporation Page 1

C2

1nF

C3

2.2uF

CM2831

PIN CONFIGURATION

BLOCK DIAGRAM

300mA CMOS LDO W

SOT-23-5

Top View

5

VIN VOUT

1

2

4

GND

3

BYP

EN

ITH

E

NABLE

IN

OUT

Overcurrent

1uA

Shutdown

Thermal

R1

Shutdown

EN

BYP

-

AMP

+

Vref = 1.176V

R2

GND

2002/04/12

Rev. 3

Champion Microelectronic Corporation Page 2

CM2831

300mA CMOS LDO W

ITH

E

NABLE

ORDERING INFORMATION

Part Number Output Voltage Temperature Range Package

CM2831AIM25 1.5V -40℃ ~ +85℃ SOT-23-5 CM2831DIM25 1.8V -40℃ ~ +85℃ SOT-23-5 CM2831EIM25 1.9V -40℃ ~ +85℃ SOT-23-5 CM2831HIM25 2.2V -40℃ ~ +85℃ SOT-23-5

CM2831KIM25 2.5V -40℃ ~ +85℃ SOT-23-5 CM2831MIM25 2.7V -40℃ ~ +85℃ SOT-23-5 CM2831NIM25 2.8V -40℃ ~ +85℃ SOT-23-5 CM2831OIM25 2.9V -40℃ ~ +85℃ SOT-23-5

CM2831PIM25

CM2831SIM25 CM2831UIM25

CM2831VIM25

CM2831XIM25

Note: For other pre-set output voltage requirements, please contact Champion Sales office.

ABSOLUTE MAXIMUM RATINGS

3.0V

3.3V

3.5V

3.6V

3.8V

-40℃ ~ +85℃ SOT-23-5

OPERATING RATINGS

Input Voltage …………….……………………………. +7V Output Current …………………….…… P Output Voltage …………………… GND-0.3V to VIN+0.3V ESD Classification ………………………………………… B

/ (VIN - Vo) mA

D

Ambient Temperature Range (T Junction Temperature Range …..…... -40℃ to +125℃

) ……... -40℃ to +85℃

A

THERMAL INFORMATION

Parameter Maximum Unit

Thermal Resistance (Θjc)

Internal Power Dissipation (PD)

(ΔT = 100℃) Maximum Junction Temperature 150 Maximum Lead Temperature (10 Sec) 300 Caution: Stress above the listed absolute rating may cause permanent damage to the device.

SOT-23-5 260 SOT-23-5 380

℃/W ℃/W

℃ ℃

2002/04/12

Rev. 3

Champion Microelectronic Corporation Page 3