AMC8877-5.0DBT datasheet(4/9 Pages) ETC

No de pièce	AMC8877-5.0DBT

Description	LOW NOISE 300mA LOW DROPOUT REGULATOR

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AMC DOC. #: AMC8877_A (LF)

AMC8877

Jun 2004

LOW NOISE 300mA

LOW DROPOUT REGULATOR

RECOMMENDED OPERATING CONDITIONS

Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Units

Input Voltage

VIN

2.5

6.5

V

Load Current

I

O

5

300

mA

Input Capacitor (VIN to GND)

1.0

µF

Output Capacitor with ESR of 10

Ω max., (VOUT to GND)

1.0

µF

Note:

1. CIN: A 1.0 µF capacitor (or larger) should be placed between VIN to GND.

2. COUT: A 1.0 µF (or larger) capacitor is recommended between VOUT and GND for stability and improving the regulator’s transient response. The

ESR (Effective Series Resistance.) of this capacitor has no effect on regulator stability, but low ESR capacitors improve high frequency transient

response. The value of this capacitor may be increased without limit, but values larger than 10uF tend to increase the settling time after a step

change in input voltage or output current. The part may oscillate without the capacitor. Any type of capacitor can be used, but not Aluminum

electrolytics when operating below -25 OC, The capacitance may be increased without limit.

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, these specifications apply over the operating ambient temperature of 0

°C to +70 °C with

VIN = VOUT(NOMIAL) + 0.5V, and are for DC characteristics only. (Low duty cycle pulse testing techniques are used

which maintains junction and case temperatures equal to the ambient temperature.)

AMC8877

Parameter

Symbol

Test Conditions

Min

Typ.

Max

Units

IOUT = 10mA, TA = +25

OC

-1.4

+1.4

Output Voltage Accuracy

∆VOUT

IOUT = 10 to 300mA

-3

+2

%

Maximum Output Current

IOUT

300

mA

Current Limit

ILIMIT

330

mA

IOUT = 10mA

1.6

9

Ground Pin Current

IQ

IOUT = 300mA

1.7

9

µA

IOUT = 50mA

50

120

IOUT = 150mA

165

300

Dropout Voltage

VDROP

IOUT = 300mA

450

650

mV

Line Regulation

∆VOI

VIN = (VOUT + 0.1V) to 6.5V, IOUT = 1mA -0.15

0

0.15

%/V

Load Regulation

∆VOL

IOUT = 10 to 300mA, COUT = 10µF

40

80

mV

Ripple Rejection

PSRR

f=100Hz, IL=100uA

50

dB

COUT = 10µF

30

Output Voltage Noise

en

f = 10Hz - 100KHz,

CBP = 0.01µF

COUT = 100µF

20

µVRMS

Shutdown Input Threshold High

VSIH

VIN = 2.5V to 5.5V

2.0

V

Shutdown Input Threshold Low

VSIL

VIN = 2.5V to 5.5V

0.4

V

TA = +25

OC

0.01

1

Shutdown Supply Current

IQ(SHDN) VOUT = 0V

TA = +85

OC

0.2

µA

TA = +25

OC

0.01

100

Shutdown Input Bias Current

ISHDN

VSHDN = VIN

TA = +85

OC

0.5

nA

TA = +25

OC

6

Shutdown Exit Delay

tdelay

CBP = 0.1µF,

COUT = 1µF, No load TA = +85 OC

6

ms

Thermal Shutdown Temperature

TSHDN

+150

OC

Note:

1. Current limit is measured at constant junction temperature, using pulse ON time.

2. Dropout is measured at constant junction temperature, using pulse ON time, and criterion is VOUT inside target value ± 2 %.

3. Regulation is measured at constant junction temperature, using pulsed ON time.

Copyright

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