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LM5642X Datasheet(PDF) 6 Page - Texas Instruments |
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LM5642X Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 40 page  LM5642, LM5642X SNVS219J – MAY 2004 – REVISED MAY 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) Unless otherwise specified, VIN = 28V, GND = PGND = 0V, VLIN5 = VDD1 = VDD2. Limits appearing in boldface type apply over the specified operating junction temperature range, (-40°C to +125°C, if not otherwise specified). Specifications appearing in plain type are measured using low duty cycle pulse testing with TA = 25°C (1), (2). Min/Max limits are specified by design, test, or statistical analysis. Symbol Parameter Conditions Min Typ Max Units Gate Drive ICBOOT CBOOTx Leakage Current VCBOOT1 = VCBOOT2 = 7V 10 nA ISC_DRV HDRVx and LDRVx Source VCBOOT1 = VCBOOT2 = 5V, VSWx=0V, 0.5 A Current HDRVx=LDRVx=2.5V Isk_HDRV HDRVx Sink Current VCBOOTx = VDDx = 5V, VSWx = 0V, HDRVX 0.8 A = 2.5V Isk_LDRV LDRVx Sink Current VCBOOTx = VDDx = 5V, VSWx = 0V, LDRVX 1.1 A = 2.5V RHDRV HDRV1 & 2 Source On- VCBOOT1 = VCBOOT2 = 5V, 3.1 Ω Resistance VSW1 = VSW2 = 0V HDRV1 & 2 Sink On- 1.5 Ω Resistance RLDRV LDRV1 & 2 Source On- VCBOOT1 = VCBOOT2 = 5V, 3.1 Ω Resistance VSW1 = VSW2 = 0V VDD1 = VDD1 = 5V LDRV1 & 2 Sink On- 1.1 Ω Resistance Oscillator and Sync Controls 5.5 ≤ VIN ≤ 36V, LM5642 166 200 226 Fosc Oscillator Frequency kHz 5.5 ≤ VIN ≤ 36V, LM5642X 311 375 424 Don_max Maximum On-Duty Cycle VFB1 = VFB2 = 1V, Measured at pins 96 98.9 % HDRV1 and HDRV2 Ton_min Minimum On-Time 166 ns SSOT_delta HDRV1 and HDRV2 Delta ON/SS1 = ON/SS2 = 2V 20 250 ns On Time VHS SYNC Pin Min High Input 2 1.52 V VLS SYNC Pin Max Low Input 1.44 0.8 V Error Amplifier IFB1, IFB2 Feedback Input Bias VFB1_FIX = 1.5V, VFB2_FIX = 1.5V 80 ±200 nA Current Icomp1_SC, COMP Output Source VFB1_FIX = VFB2_FIX = 1V, 6 127 Icomp2_SC Current VCOMP1 = VCOMP2 = 1V µA -20°C to 85°C 18 Icomp1_SK, COMP Output Sink Current VFB1_FIX = VFB2_FIX = 1.5V and 6 118 Icomp2_SK VCOMP1 = VCOMP2 = 0.5V µA -20°C to 85°C 18 gm1, gm2 Transconductance 720 µmho GISNS1, Current Sense Amplifier VCOMPx = 1.25V 4.2 5.2 7.5 GISNS2 (1&2) Gain Voltage References and Linear Voltage Regulators UVLO VLIN5 Under-voltage ON/SS1, ON/SS2 transition Lockout from low to high 3.6 4.0 4.4 V Threshold Rising 6 Submit Documentation Feedback Copyright © 2004–2011, Texas Instruments Incorporated Product Folder Links: LM5642 LM5642X |
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