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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MIC3291 датащи(PDF) 3 Page - Micrel Semiconductor |
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MIC3291 датащи(HTML) 3 Page - Micrel Semiconductor |
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3 / 17 page  Micrel, Inc. MIC3291 September 2010 3 M9999-092810 (408) 944-0800 Absolute Maximum Ratings (1) Supply Voltage (VIN) ....................................................7.5V Switch Voltage (VSW)..................................... –0.3V to 27V Digital Control Voltage (VDC) ..............................–0.3 to VIN FB Voltage (VFB)............................................................. 6V Switch Current (ISW)........................................................ 2A Ambient Storage Temperature (TS)......... –65°C to +150°C ESD Rating (2)................................................................2KV Operating Ratings (3) Supply Voltage (VIN) …………………..……......2.5V to 6.5V Output Voltage (VOUT) …………….… ............... (VIN to VOVP) Junction Temperature Range (TJ) …… .... −40°C to +125°C Package Thermal Impedance θJA 2mm × 2mm MLF®-8L ................................. 93°C/W θJA TSOT23-6 .................................................. 235°C/W Electrical Characteristics (4) TA = +25 oC, VIN = 3.6V, VOUT = 10V, IOUT = 20mA, unless otherwise noted. Bold values indicate −40°C ≤ TJ ≤ +125°C. Symbol Parameter Condition Min. Typ. Max. Units VIN Supply Voltage Range 2.5 6.5 V VUVLO Under-Voltage Lockout 1.8 2.1 2.4 V IVIN Quiescent Current VFB >500mV 2 4 mA ISD Shutdown Current (DC Pin Low ) VDC = 0V for > 2ms. 0.01 1 μA VFB Feedback Voltage ( ±5%) 237 250 263 mV Feedback Input Current VFB = 250mV 450 nA Line Regulation 2.5V ≤ VIN ≤ 4.5V 0.5 IFB Load Regulation 5mA ≤ IOUT ≤ 20mA 0.5 % DMAX Maximum Duty Cycle 86 90 % ISW Switch Current Limit VIN = 3.6V 500 750 1200 mA VDC DC Pin Thresholds High Low 1.1 0.4 V IDC DC Pin Current VDC = 3.6V 5 10 μA tshutdown Shutdown Pulse Width VIN = 2.8V to 5.5V VDC = Low 1260 µs tMODE_UP Count UP Mode Pulse Width VIN = 2.8V to 5.5V VDC = Low 100 160 µs tMODE_DOWN Count Down Mode Pulse Width VIN = 2.8V to 5.5V VDC = Low 420 500 µs tstart_up Turn-On Delay Time VIN = 2.8V to 5.5V 140 µs tprog_low Programming Pulse Width Low VIN = 2.8V to 5.5V 1 32 µs tprog_high Programming Pulse Width High VIN = 2.8V to 5.5V 1 32 µs tdelay Minimum Delay for Mode Change VIN = 2.8V to 5.5V VDC = High 140 µs Tprog_setup First Pulse Window for Preprogramming VIN = 2.8V to 5.5V 35 50 µs fSW Oscillator Frequency 1 1.2 1.35 MHz |
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