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ILC6377 Datasheet(PDF) 4 Page - Impala Linear Corporation

Part # ILC6377
Description  0.5A, 300KHZ, SO-8 PWM/PFM STEP DOWN CONVERTER WITH SHUTDOWN
PDF  11 Pages
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Manufacturer  IMPALA [Impala Linear Corporation]
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Logo IMPALA - Impala Linear Corporation

ILC6377 Datasheet(HTML) 4 Page - Impala Linear Corporation

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0.5A, 300kHz, SO-8 PWM/PFM Step Down Converter with Shutdown
Impala Linear Corporation
4
(408) 574-3939
www.impalalinear.com
June 1999
ILC6377 1.3
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Feedback Voltage (pin5)
VFB
.995
1.000
1.015
V
Input Voltage
VOUT
RFB1 + RFB2 < 2MΩ
38
V
Output Current
IOUT
500
600
mA
Input Supply Current
IIN
VIN 5.25V, No Load
71
110
µA
Shutdown Current
IS/D
VS/D = 0V
1.5
2.5
µA
LX Switch On-Resistance
Rds(on)
Open Loop Measurement, VS/D = VIN,
0.44
0.58
Ω
VLX = VIN - 0.4V, VOUT = 4.5V
LX Switch On-Resistance
ILXL
Open Loop Measurement, VOUT = VIN,
2.0
µA
VLX = 0V
Shutdown Input Voltage
VS/D
High = Regulator “ON”
0.65
0.2
V
Low = Regulator “OFF”
Oscillator Frequency
FOSC
Measure Waveform at EXT pin VIN =
255
300
345
kHz
5.3V IOUT = 20mA
Max Duty Cycle
MAXDTY
100
%
PFM Duty Cycle
PFMDTY
No Load
10
17
25
%
Efficiency
EFFI
95
%
Undervoltage Lockout
VUVLO
Minimum VIN when Vref does not start up
1
1.8
V
Soft-Start Time
TSS
Vref rises to 0V from 0.9V
6.0
10.0
16.0
msec
Internal Protection Time
TPRO
Time from VOUT m = 0V to VS/D going low
3.0
5.0
8.0
msec
EXT1, EXT2 Hi On-Resistance
REXtHI
Open Loop Measurement
24
32
Ω
EXT1, EXT2 Low On-Resistance
REXtLOW
Open Loop Measurement
20
26
Ω
Electrical Characteristics ILC6377SO-Adj
Unless Otherwise specified all limits are at VOUT programmed to 5.0V, VIN = 6V, FOSC=300kHz, IOUT = 200mA, TA = 25°C. Circuit configuration of figure 1.



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