ILC6376 Ver la hoja de datos (PDF) - Fairchild Semiconductor

Número de pieza

componentes Descripción

Fabricante

ILC6376

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

Fairchild Semiconductor 

ILC6376/77

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

Feedback Voltage (pin 5)

Output Voltage

Output Maximum Current

Input Supply Current

Shutdown Current

LX Switch On-Resistance

LX Leak Current

Oscillator Frequency

Max Duty Cycle

PFM Duty Cycle

Efficiency

Undervoltage Lockout

Soft-Start Time

Shutdown Input Voltage

EXT1, EXT2 Hi On-

Resistance

EXT1, EXT2 Low On-

Resistance

Symbol

VFB

VOUT

IOUT(MAX)

IIN

IS/D

Rds(on)

ILXL

FOSC

MAXDTY

PFMDTY

EFFI

VUVLO

TSS

VS/D

REXtHI

Conditions

RFB1 + RFB2 < 2MΩ

VIN 5.25V, No Load

VS/D = 0V

Open Loop Measurement, VS/D = VIN,

VLX = VIN - 0.2V, VOUT = 4.5V

Open Loop Measurement, VOUT =

VIN, VLX = 0V

Measure Waveform at EXT pin VIN =

5.3V IOUT = 20mA

No Load (ILC6377)

Minimum VIN when VREF does not

start up

VREF rises to 0V from 0.9V

High = Regulator “ON”

Low = Regulator “OFF”

Open Loop Measurement

Min.

.995

1.5

500

255

15

0.9

6.0

0.65

Typ.

1.000

600

71

1.5

0.44

Max.

1.015

6

110

2.5

0.58

Units

V

V

mA

µA

µA

Ω

2.0 µA

300 345 kHz

100

%

25

35

%

95

%

1.8 V

10.0 16.0 msec

V

0.2

24

32

Ω

REXtLOW Open Loop Measurement

20

26

Ω

©2001 Fairchild Semiconductor Corporation

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