ILC6376 datasheet(3/12 Pages) FAIRCHILD

Teilenummer	ILC6376

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

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Hersteller	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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Absolute Maximum Ratings (T

A=25°C)

Electrical Characteristics ILC6376/77SO33

VOUT = 3.3V, VIN = 4V, FOSC=300kHz, IOUT = 130mA, TA = 25°C, unless otherwise specified. Circuit configuration figure 1.

Parameter

Symbol

Ratings

Units

VIN Input Voltage Pin

VIN

-0.3 to +12

V

VOUT Pin (ILC6376/77SOXX)

FB Pin (ILC6376/77SOADJ)

VOUT

VFB

-0.3 to +12

-0.3 to VIN +0.3

V

Voltage on LX pin

VLX

VIN - VLX = -0.3 to +12

V

Peak Switch Current on LX pin

ILX

700

mA

Voltage on P_BST pin

VDP_BST

VIN - VP_BST = -0.3 to +12

V

Current EXT1, EXT2 pins

IEXT1, IEXT2±50

mA

Voltage on all other pins

~

-0.3 to VIN + 0.3

V

Continuous Total Power Dissipation

PD

300

mW

Operating Ambient Temperature

TOPR

-30~+80

°C

Storage Temperature

TSTG

-40~+125

°C

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Output Voltage

VOUT

3.218

3.300

3.383

V

Input Voltage

VIN

10

V

Output Maximum Current

IOUT(MAX)

500

600

mA

Input Current Supply

IIN

VIN 3.5V, No Loads

ILC6376

1480

2190

µA

ILC6377

50

86

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 = 3V

0.64

0.85

Ω

LX Switch Leakage Current

ILXL

Open Loop Measurement, VOUT =

VIN, VLX = 0V

2.0

µA

Oscillator Frequency

FOSC

Measurement Waveform at EXT pin

VIN = 3.6V 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

VSD

High = Regulator “ON”

Low = Regulator “OFF”

0.65

0.2

V

EXT1, EXT2 Hi On-

Resistance

REXtHI

3V applied to VOUT with no external

components

35

47

Ω

EXT1, EXT2 Low On-

Resistance

REXtLOW

3.6V applied to VOUT with no

external components

29

37

Ω

ILC6376/77

3

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