ILC6377SO-50 datasheet(2/11 Pages) IMPALA

Part #	ILC6377SO-50

Description	0.5A, 300KHZ, SO-8 PWM/PFM STEP DOWN CONVERTER WITH SHUTDOWN

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Manufacturer	IMPALA [Impala Linear Corporation]

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

Impala Linear Corporation

2

(408) 574-3939

www.impalalinear.com

June 1999

ILC6377 1.3

Conditions

VIN 3.5V, No Loads

VS/D = 0V

Open Loop Measurement, VS/D = VIN, VLX =

VIN - 0.4V, VOUT = 3V

Open Loop Measurement, VOUT = VIN,

VLX = 0V

Measurement Waveform at EXT pin VIN =

3.6V IOUT = 20mA

No Load

Minimum VIN when Vref does not start up

Vref rises to 0V from 0.9V

Parameter

Output Voltage

Input Voltage

Output Voltage

Input Current Supply

Shutdown Current

LX Switch On - Resistance

LX Switch Leakage Current

Oscillator Frequency

Max Duty Cycle

PFM Duty Cycle

Efficiency

Undervoltage Lockout

Soft-Start Time

Symbol

VOUT

VIN

IOUT

IIN

IS/D

Rds(on)

ILXL

FOSC

MAXDTY

PFMDTY

EFFI

VUVLO

TSS

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

VIN Input Voltage Pin

VOUT Pin (ILC6370SO-XX)

FB Pin (ILC6377SO-Adj)

Voltage on LX pin

Peak Switch Current on LX pin

Voltage on P_BST pin

Current EXT1, EXT2 pins

Voltage on all other pins

Continuous Total Power Dissipation

Operating Ambient Temperature

Storage Temperature

Symbol

VIN

VOUT

VFB

VLX

ILX

VDP_BST

IEXT1, IEXT2

~

PD

TOPR

TSTG

Ratings

-0.3 to +12

-0.3 to VIN +12

VIN - VLX = 0.3 to +12

700

VIN - VP_BST = 0.3 to +12

±50

-0.3 to VIN

500

-30~+80

-40~+125

Units

V

mA

V

mA

V

mA

°C

Typ

3.300

600

55

1.5

0.64

300

100

17

95

10.0

Min

3.218

500

255

10

1

6.0

Max

3.383

10

86

2.5

0.85

2.0

345

25

1.8

16.0

Units

V

mA

µA

Ω

µA

kHz

%

V

msec

Absolute Maximum Ratings (TA=25°C)

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