ILC6377SO33 datasheet(5/12 Pages) FAIRCHILD

Teilenummer	ILC6377SO33

Bauteilbeschribung	0.5A, 300kHz, SO-8 PWM/PFM Step Down Converter with Shutdown

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Hersteller	FAIRCHILD [Fairchild Semiconductor]

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Electrical Characteristics ILC6376/77SOADJ

Unless Otherwise specified all limits are at VOUT programmed to 5.0V, VIN = 6V, FOSC=300kHz, IOUT = 200mA, TA = 25°C.

Circuit configuration figure 1.

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Feedback Voltage (pin 5)

VFB

.995

1.000

1.015

V

Output Voltage

VOUT

RFB1 + RFB2 < 2MΩ

1.5

6

V

Output Maximum Current

IOUT(MAX)

500

600

mA

Input Supply Current

IIN

VIN 5.25V, No Load

71

110

µA

Shutdown Current

IS/D

VS/D = 0V

1.5

2.5

µA

LX Switch On-Resistance

Rds(on)

Open Loop Measurement, VS/D = VIN,

VLX = VIN - 0.2V, VOUT = 4.5V

0.44

0.58

Ω

LX Leak Current

ILXL

Open Loop Measurement, VOUT =

VIN, VLX = 0V

2.0

µA

Oscillator Frequency

FOSC

Measure Waveform at EXT pin VIN =

5.3V IOUT = 20mA

255

300

345

kHz

Max Duty Cycle

MAXDTY

100

%

PFM Duty Cycle

PFMDTY

No Load (ILC6377)

15

25

35

%

Efficiency

EFFI

95

%

Undervoltage Lockout

VUVLO

Minimum VIN when VREF does not

start up

0.9

1.8

V

Soft-Start Time

TSS

VREF rises to 0V from 0.9V

6.0

10.0

16.0

msec

Shutdown Input Voltage

VS/D

High = Regulator “ON”

Low = Regulator “OFF”

0.65

0.2

V

EXT1, EXT2 Hi On-

Resistance

REXtHI

Open Loop Measurement

24

32

Ω

EXT1, EXT2 Low On-

Resistance

REXtLOW

Open Loop Measurement

20

26

Ω

5

ILC6376/77

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