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

Absolute Maximum Ratings (TA=25°C)

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 +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

V

V

mA

V

mA

V

mA

°C

°C

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

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

VOUT

3.218 3.300 3.383 V

VIN

10 V

IOUT

500 600

mA

IIN

VIN 3.5V, No Loads

IS/D

Rds(on)

ILXL

FOSC

MAXDTY

VS/D = 0V

Open Loop Measurement,

VIN - 0.4V, VOUT = 3V

VS/D

=

VIN,

VLX

=

Open Loop Measurement, VOUT = VIN,

VLX = 0V

Measurement Waveform at EXT pin VIN =

3.6V IOUT = 20mA

55 86 µA

1.5 2.5 µA

0.64 0.85 Ω

2.0 µA

255 300 345 kHz

100

%

PFMDTY No Load

10 17 25 %

EFFI

95

%

VUVLO Minimum VIN when Vref does not start up

1

1.8 V

TSS

Vref rises to 0V from 0.9V

6.0 10.0 16.0 msec

Impala Linear Corporation

ILC6377 1.3

(408) 574-3939 www.impalalinear.com

June 1999 2

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