CM2855 datasheet(4/10 Pages) ETC

Part #	CM2855

Description	300MA CMOS LDO WITH EN & PG

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CM2855

300mA CMOS LDO WITH EN & PG

2004/6/01 Rev. 1.2

Champion Microelectronic Corporation

Page 4

ELECTRICAL CHARACTERISTICS

TA = +25

℃; VIN = V

IN(MIN) unless otherwise noted

CM2855

Parameter

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Input Voltage

VIN

Note 2

7

V

Output Voltage Accuracy

VOUT

IO = 1mA

-2.5

2.5

%

1.2V< VO(NOM)<=2.0V

1300

2.0V< VO(NOM)<=2.5V

800

Dropout Voltage

VDROPOUT

IO = 300mA,

VOUT=VO(NOM)-2.5%,

2.5V< VO(NOM)

300

mV

Output Current

IO

VOUT > 1.2V

300

mA

Current Limit

ILIM

VOUT > 1.2V

800

mA

Short Circuit Current

ISC

VOUT < 0.8V (Note 3)

150

mA

Quiescent Current

IQ

IO = 0mA

30

35

μ

A

Ground Pin Current

IGND

IO = 1mA to 300mA

30

35

μ

A

Bandgap Reference

VBG

VO = VBG, load = 10mA

1.168

1.176

1.184

V

VOUT < 2.0V

-0.1

0.02

0.1

%

2.0V<VOUT < 3.0V -.015

0.03

0.15

%

Line Regulation

REGLINE

IOUT=1mA, VIN=VOUT+1 to

VOUT+2

3.0V<VOUT

-0.3

0.06

0.3

%

Load Regulation

REGLOAD

IO=1mA to 300mA

0.2

1

%

Over Temperature Shutdown

OTS

150

℃

Over Temperature Hysteresis

OTH

30

℃

VOUT Temperature Coefficient

TC

25

ppm/℃

f=1kHz

60

f=10kHz

50

Power Supply Rejection

PSRR

IO = 100mA

CO=2.2µF ceramic

f=100kHz

40

dB

Output Voltage Noise

eN

f=10Hz to 100kHz

IO = 10mA

CO=2.2µF

30

μ

Vrms

IEH

VEN=VIN, VIN=2.7V to 7V

0.1

μ

A

EN Input Bias Current

IEL

VEN=0V, VIN=2.7V to 7V

1.0

3.0

μ

A

VEH

VIN=2.7V to 7V

VIN/2+0.8V

VIN

V

EN Input Threshold

VEL

VIN=2.7V to 7V

0

VIN/2-0.8V

V

Shutdown Supply Current

ISD

VIN=5.0V, VOUT=0V, VEN < VEL

2.0

μ

A

Shutdown Output Voltage

VO, SD

IO=300mA

0

0.1

V

PG Leakage Current

ILC

VPG = 7V

1

μ

A

PG Voltage Rating

VPG

VOUT in regulation

7

V

PG Low Threshold

% of VO (PG ON)

89.5

%

PG High Threshold

% of VO (PG OFF)

96.5

%

PG Voltage Low

VOL

ISINK = 2mA

0.1

V

VIN = 5V

7.8

ms

Delay Time to PG (Note 3)

tDELAY

VIN = 3V

3.8

ms

Note 2.

VIN(MIN) = VOUT + VDROPOUT

Note 3.

Guaranteed by Design, not 100% test. VIN start time needs to be less than 2ms.

Note 4.

Short Circuit Current and Current limit value will increase as input voltage is larger than VIN(MIN)

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