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LTC4006 Datasheet(PDF) 4 Page - Linear Technology |
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LTC4006 Datasheet(HTML) 4 Page - Linear Technology |
4 / 20 page 4 LTC4006 4006fa The ● denotes specifications which apply over the full operating temperature range (Note 4), otherwise specifications are at TA = 25°C. VDCIN = 20V, VBAT = 12V unless otherwise noted. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Oscillator fOSC Regulator Switching Frequency 255 300 345 kHz fMIN Regulator Switching Frequency in Drop Out Duty Cycle ≥ 98% 20 25 kHz DCMAX Regulator Maximum Duty Cycle VCSP = VBAT 98 99 % Gate Drivers (TGATE, BGATE) VTGATE High (VCLN – VTGATE)ITGATE = –1mA 50 mV VBGATE High CLOAD = 3000pF 4.5 5.6 10 V VTGATE Low (VCLN – VTGATE)CLOAD = 3000pF 4.5 5.6 10 V VBGATE Low IBGATE = 1mA 50 mV TGATE Transition Time TGTR TGATE Rise Time CLOAD = 3000pF, 10% to 90% 50 110 ns TGTF TGATE Fall Time CLOAD = 3000pF, 10% to 90% 50 100 ns BGATE Transition Time BGTR BGATE Rise Time CLOAD = 3000pF, 10% to 90% 40 90 ns BGTF BGATE Fall Time CLOAD = 3000pF, 10% to 90% 40 80 ns VTGATE at Shutdown (VCLN – VTGATE)ITGATE = –1µA, DCIN = 0V, CLN = 12V 100 mV VBGATE at Shutdown IBGATE = 1µA, DCIN = 0V, CLN = 12V 100 mV Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: See Test Circuit Note 3: Does not include tolerance of current sense resistor. Note 4: The LTC4006E is guaranteed to meet performance specifications from 0 °C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. TYPICAL PERFOR A CE CHARACTERISTICS INFET Response Time to Reverse Current TEST PERFORMED ON DEMOBOARD VIN = 15VDC CHARGER = ON ICHARGE = <10mA Vs OF PFET (5V/DIV) Id (REVERSE) OF PFET (5A/DIV) Vgs OF PFET (2V/DIV) 4006 G01 LTC4006-2 INFET = 1/2 Si4925DY Vgs = 0 Vs = 0V Id = 0A 1.25 µs/DIV VOUT vs IOUT PWM Frequency vs Duty Cycle DUTY CYCLE (VOUT/VIN) 0 0.1 0.2 0.4 0.6 0.9 0.8 0.3 0.5 0.7 1.0 4006 G03 PROGRAMMED CURRENT = 10% DCIN = 15V DCIN = 20V DCIN = 24V 350 300 250 200 150 100 50 0 OUTPUT CURRENT (A) 0 0.5 1.0 2.0 3.0 4.0 1.5 2.5 3.5 4.5 4006 G02 DCIN = 20V VBAT = 12.6V 0 –0.5 –1.0 –1.5 –2.0 –2.5 –3.0 –3.5 –4.0 –4.5 –5.0 |
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