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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP1650 датащи(PDF) 5 Page - Microchip Technology |
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MCP1650 датащи(HTML) 5 Page - Microchip Technology |
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5 / 28 page  2004 Microchip Technology Inc. DS21876A-page 5 MCP1650/51/52/53 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † VIN TO GND...........................................................6.0V CS,FB,LBI,LBO,SHDN,PG,EXT............ GND – 0.3V to VIN + 0.3V Current at EXT pin ................................................ ±1A Storage temperature .......................... -65°C to +150°C Operating Junction Temperature........ -40°C to +125°C ESD protection on all pins ........................... ≥ 4kV HBM † Notice: Stresses above those listed under “Maximum Rat- ings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Expo- sure to maximum rating conditions for extended periods may affect device reliability. DC CHARACTERISTICS Electrical Specifications: Unless otherwise noted, all parameters apply at VIN = +2.7V to +5.5V, SHDN =High, TJ = -40°C to +125°C. Typical values apply for VIN = 3.3V, TA +25°C. Parameters Sym Min Typ Max Units Conditions Input Characteristics Supply Voltage VIN 2.7 — 5.5 V Undervoltage Lockout (S Option) UVLO 2.4 2.55 2.7 V VIN rising edge Under Voltage Lockout (R Option) UVLO 1.85 2.0 2.15 V VIN rising edge Undervoltage Hysteresis UVLOHYST —117 — mV Shutdown Supply Current ISHD — 0.001 1 µA SHDN = GND Quiescent Supply Current IQ — 120 220 µA EXT = Open Soft Start Time TSS — 500 — µs Feedback Characteristics Feedback Voltage VFB 1.18 1.22 1.26 V All conditions Feedback Comparator Hysteresis VHYS —12 23 mV Feedback Input Bias Current IFBlk -50 — 50 nA VFB < 1.3V Current Sense Input Current Sense Threshold ISNS-TH 75 114 155 mV Delay from Current Sense to Output Tdly_ISNS —80 — ns Ext Drive EXT Driver ON Resistance (High Side) RHIGH —8 18 Ω EXT Driver ON Resistance (Low Side) RLOW —4 12 Ω Oscillator Characteristics Switching Frequency FOSC 650 750 850 kHz Low Duty Cycle Switch-Over Voltage VLowDuty —3.8 — V VIN rising edge Duty Cycle Switch Voltage Hysteresis DCHyst —92 — mV Low Duty Cycle DCLOW 50 56 62 % High Duty Cycle DCHIGH 72 80 88 % |
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