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ILC6377SO-50 Datasheet(PDF) 4 Page - Impala Linear Corporation |
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ILC6377SO-50 Datasheet(HTML) 4 Page - Impala Linear Corporation |
4 / 11 page 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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