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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LX1668 датащи(PDF) 3 Page - Microsemi Corporation |
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LX1668 датащи(HTML) 3 Page - Microsemi Corporation |
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3 / 15 page  PROGRAMMABLE MULTIPLE OUTPUT DC:DC CONTROLLER LX1668 PRODUCT DA T ABOOK 1996/1997 3 Copyright © 1999 Rev. 1.0 4/99 P RODUCTION D AT A S HEET ELECTRICAL CHARACTERISTICS (Unless otherwise specified, 4.75V < V CC5 < 5.25V and 10.8V < VCC12 < 13.2V, 0°C ≤ TA ≤ 70°C. Test conditions: V CC3 = VCC5, VCC5 = 5V, VCC12 = 12V, T = 25°C.) Reference & DAC Parameter Symbol Test Conditions Initial Accuracy V CORE (Less 40mV output adaptive positioning), 1.3V ≤ V CORE ≤ 35V, T = 25°C Cumulative Regulation Accuracy 1.3V ≤ V CORE ≤ 3.5V Timing Off Time OT V CORE = 2.0V Swicthing Frequency Freq V CORE = 1.3V to 3.5V Input Resistance R CORE 0V < V FB = VCORE < 3.5V Pulse By Pulse Current Limit V CLP Current Sense Delay To Output Overdrive ≤ 5mV Error Comparator / CS- Input Bias Current I FB 1.0V < V SS = VFB < 3.5V E C Delay to Output Overdrive ≤ 5mV Output Drivers Drive Rise Time, Fall Time T RF C L = 3000pF Drive High V DH I SOURCE = 20mA Drive Low V DL I SINK = 20mA UVLO and Soft-Start (SS) V CC5 Start-Up Threshold V ST V CC12 > 3.9V Hysteresis SS Resistor R SS SS Output Enable V EN Hiccup Duty Cycle DC HIC C SS = 0.1µF, V DAC = 2.00V, FREQ = 100Hz Supply Current V CC12 Dynamic Supply Current I CD Out Freq = 200kHz, C L = 3000pF, Synch., VSS > 0.5V Static Supply Current 12V I VCC12 V SS < 0.5V 5V I VCC5 V SS < 0.5V 3.3V I VCC3 V SS < 0.5V Power Good / Over-Voltage Protection (OVP) Threshold (V CORE / VSET) V CORE rising, VOUT2 ≥ 2.0V (V CORE / VSET) V CORE falling, VOUT2 ≥ 2.0V Hysteresis Power Good Voltage Low I PWRGD = 4mA Over-Voltage Threshold (V CORE / VSET), V CORE rising OVP Sourcing Current V OVP = 2.0V Units -1 +1 % -1.5 1.5 % LX1668 Min. Typ. Max. 2.4 µs 250 kHz -0.3 -1 µA 100 ns 12 k Ω 45 60 mV 100 ns 100 ns 10 11 V 0.1 V 3.9 4.2 4.6 V 0.10 V 18 k Ω 0.4 0.5 V 10 % 24 mA 69 mA 13 18 mA 0.4 2 mA 108 110 111 % 90 91 92 % 2% 0.5 0.7 V 110 117 125 % 35 60 mA Fixed Linear Regulator (V OUT2) Voltage Reference Tolerance V OUT2 = 2.5V, C OUT = 220µF Regulation -10mA ≤ I OUT2 ≤ -150mA Current Limit V OUT2 ≤ 2V -2.3 +2.0 % -1 +1 % 250 mA Current Sense + VID Pins 0.8 V 2.0 V Low Input V IL Internally pulled up to V CC5 thru 30k High Input V IH Linear Regulator Controller Voltage Reference Tolerance V LFB = 1.5V, COUT = 330µF Source Current I LDRV I LDRV flows from VCC12 Sink Current I LDRV -2.3 +1.5 % 30 mA 0.2 mA |
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