ILC6377SO-ADJ 데이터 시트보기 (PDF) - Impala Linear Corporation
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ILC6377SO-ADJ Datasheet PDF : 11 Pages
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0.5A, 300kHz, SO-8 PWM/PFM Step Down Converter with Shutdown
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.
Parameter
Symbol
Conditions
Min Typ Max Units
Feedback Voltage (pin5)
Input Voltage
Output Current
VFB
VOUT
IOUT
RFB1 + RFB2 < 2MΩ
.995 1.000 1.015 V
3
8
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 On-Resistance
ILXL
Open Loop Measurement, VOUT = VIN,
VLX = 0V
2.0 µA
Oscillator Frequency
FOSC
Measure Waveform at EXT pin VIN = 255 300 345 kHz
5.3V IOUT = 20mA
Max Duty Cycle
PFM Duty Cycle
Efficiency
MAXDTY
PFMDTY
EFFI
No Load
100
%
10 17 25 %
95
%
Undervoltage Lockout
Soft-Start Time
Internal Protection Time
VUVLO
TSS
TPRO
Minimum VIN when Vref does not start up
1
1.8 V
Vref rises to 0V from 0.9V
6.0 10.0 16.0 msec
Time from VOUT m = 0V to VS/D going low 3.0 5.0 8.0 msec
Shutdown Input Voltage
VS/D
EXT1, EXT2 Hi On-Resistance REXtHI
EXT1, EXT2 Low On-Resistance REXtLOW
High = Regulator “ON”
Low = Regulator “OFF”
Open Loop Measurement
Open Loop Measurement
0.65
0.2 V
24 32 Ω
20
26
Ω
Impala Linear Corporation
ILC6377 1.3
(408) 574-3939 www.impalalinear.com
June 1999 4
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