ILC6377 데이터 시트보기 (PDF) - Impala Linear Corporation

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ILC6377

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

Impala Linear Corporation 

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

Electrical Characteristics ILC6377SO-33

Unless Otherwise specified all limits are at VOUT = 3.3V, VIN = 4V, FOSC=300kHz, IOUT = 130mA,TA = 25°C. Circuit configuration of figure 1.

Parameter

Symbol

Conditions

Min Typ Max Units

Internal Protection Time

Shutdown Input Voltage

EXT1, EXT2 Hi On-Resistance

TPRO Time from VOUT = 0V to VS/D going low

VSD

High = Regulator “ON”

Low = Regulator “OFF”

REXtHI 3V applied to VOUT with no external components

3.0 5.0 8.0 Msec

0.65

0.2 V

3.5 47 Ω

EXT1, EXT2 Low On-Resistance REXtLOW 3.6V applied to VOUT with no external components

29 37 Ω

Electrical Characteristics ILC6377SO-50

Unless Otherwise specified all limits are at VOUT = 5.0V, VIN = 6V, FOSC=300kHz, IOUT = 200mA, TA = 25°C. Circuit configuration of figure 1.

Parameter

Symbol Conditions

Min Typ Max Units

Output Voltage

Input Voltage

Output Current

VOUT

VIN

IOUT

4.875 5.000 5.125 V

10 V

500 600

mA

Input Supply Current

Shutdown Current

LX Switch On-Resistance

IIN

IS/D

Rds(on)

VIN 5.25V, No Load

VS/D = 0V

Open Loop Measurement, VS/D = VIN,

VLX =VIN - 0.4V, VOUT = 4.5V

71 110 µA

1.5 2.5 µA

0.44 0.58 Ω

LX Switch Leakage Current

Oscillator Frequency

Max Duty Cycle

ILXL

Open Loop Measurement, VOUT = VIN,

VLX = 0V

2.0 µA

FOSC

Measure Waveform at EXT pin VIN = 5.3V

IOUT = 20mA

255

300

345

kHz

MAXDTY

100 25 %

PFM Duty Cycle

PFMDTY No Load

10 17

%

Efficiency

Undervoltage Lockout

Soft-Start Time

Internal Protection Time

EFFI

VUVLO

TSS

TPRO

Minimum VIN when Vref does not start up

Vref rises to 0V from 0.9V

Time form VOUT m = 0V to VS/D going low

95 1.8 %

1

16.0 V

6.0 10.0 8.0 msec

3.0 5.0 0.2 msec

Shutdown Input Voltage

VS/D

High = Regulator “ON”

Low = Regulator “OFF”

0.65

V

EXT1, EXT2 Hi On-Resistance REXtHI Open Loop Measurement

EXT1, EXT2 Low On-Resistance REXtLOW Open Loop Measurement

24 32 Ω

20 26 Ω

Impala Linear Corporation

ILC6377 1.3

(408) 574-3939 www.impalalinear.com

June 1999 3

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