Datasheet LT3510 (Analog Devices) - 3

LT3510
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TJ = 25°C. VVIN1/2 = 15V, VBST1/2 = open, VRT/SYNC = 2V, VVOUT1/2 = open, unless otherwise specifi ed. PARAMETER CONDITIONS MIN TYP MAX UNITS
Feedback Voltage Line Regulation VVIN1/2 = 3V to 25V l –1 0 1 % Feedback Voltage Offset Ch 1 to Ch 2 VVC1/2 = 1V l –16 0 16 mV Feedback Bias Current Ch 1/Ch 2 VFB1/2 = 0.8V, VVC1/2 = 1V l –200 75 200 nA Error Amplifi er gm Ch 1/Ch 2 VVC1/2 = 1V, IVC1/2 = ±5μA l 150 275 450 μmho Error Amplifi er Gain Ch 1/Ch 2 1000 V/V Error Amplifi er to Switch Gain Ch 1/Ch 2 2.2 A/V Error Amplifi er Source Current Ch 1/Ch 2 VFB1/2 = 0.6V, VVC1/2 = 1V 10 15 25 μA Error Amplifi er Sink Current Ch 1/Ch 2 VFB1/2 = 1V, VVC1/2 = 1V 15 20 30 μA Error Amplifi er High Clamp Ch 1/Ch 2 VFB1/2 = 0.7V 1.75 2.0 2.25 V Error Amplifi er Switching Threshold Ch 1/Ch 2 VOUT1/2 = 5V, RT/SYNC = 133k 0.5 0.7 1.0 V Soft-Start Source Current Ch 1/Ch 2 VFB1/2 = 0.6V, VSS1/2 = 0.4V l 2 3 4.2 μA Soft-Start VOH Ch 1/Ch 2 VFB1/2 = 0.9V 1.9 2 2.4 V Soft-Start Sink Current Ch 1/Ch 2 VFB1/2 = 0.6V, VSS1/2 = 1V 200 600 1000 μA Soft-Start VOL Ch 1/Ch 2 VFB1/2 = 0V 50 80 125 mV Soft-Start to Feedback Offset Ch 1/Ch 2 VVC1/2 = 1V, VSS1/2 = 0.4V l –16 0 16 mV Soft-Start Sink Current Ch 1/Ch 2 POR VSS1/2 = 0.4V (Note 4), VVC = 1V 0.5 1.5 2 mA Soft-Start POR Threshold Ch 1/Ch 2 VFB1/2 = 0V (Note 4) 55 80 105 mV Soft-Start Switching Threshold Ch 1/Ch 2 VFB1/2 = 0V 30 50 70 mV Power Good Leakage Ch 1/Ch 2 VFB1/2 = 0.9V, VPG1/2 = 25V, VVIN1/2 = 25V, VOUT = 5V 0 1 μA Power Good Threshold Ch 1/Ch 2 VFB1/2 Rising, PG1/2 = 20k to 5V l 87 90 93 % Power Good Hysteresis Ch 1/Ch 2 VFB1/2 Falling, PG1/2 = 20k to 5V 20 30 50 mV Power Good Sink Current Ch 1/Ch 2 VFB1/2 = 0.65V, VPG1/2 = 0.4V 400 800 1200 μA Power Good Shutdown Sink Current Ch 1/Ch 2 VVIN1/2 = 2V, VFB1/2 = 0V, VPG1/2 = 0.4V 10 50 100 μA RT/SYNC Reference Voltage VFB1/2 = 0.9V, IRT/SYNC = –40μA 0.93 0.975 1 V Switching Frequency RT/SYNC = 133k, VFB1/2 = 0.6V, VBST1/2 = VSW + 3V 200 250 300 kHz RT/SYNC = 15.4k, VFB1/2 = 0.6V, VBST1/2 = VSW + 3V 1.2 1.5 1.8 MHz Switching Phase Angle Ch A to Ch B RT/SYNC = 133k, VFB1/2 = 0.6V, VBST1/2 = VSW + 3V 120 180 210 Deg Minimum Boost for 100% Duty Cycle Ch 1/Ch 2 VFB1/2 = 0.7V, IRT/SYNC = –35μA (Note 5), VOUT = 0V 1.7 2 V SYNC Frequency Range VBST1/2 = VSW + 3V 250 1500 kHz SYNC Switching Phase Angle Ch A to Ch B SYNC = 250kHz, VBST1/2 = VSW + 3V 120 180 210 Deg IND + VOUT Current Ch 1/Ch 2 VVOUT1/2 = 0V, VFB1/2 = 0.9V 40 70 100 μA VVOUT1/2 = 5V 0 1 μA IND to VOUT Maximum Current Ch 1/Ch 2 VVOUT1/2 = 0.5V (Note 6), VFB1/2 = 0.7V, VBST1/2 = 20V 2.25 2.8 4 A VVOUT1/2 = 5V (Note 6), RT/SYNC = 133k, VBST1/2 = 20V 2.5 2.8 4 A Switch Leakage Current Ch 1/Ch 2 VSW1/2 = 0V, VVIN1/2 = 25V l 0 50 μA Switch Saturation Voltage Ch 1/Ch 2 ISW1/2 = 2A, VBST1/2 = 20V, VFB1/2 = 0.7V l 250 400 mV Boost Current Ch 1/Ch 2 ISW1/2 = 2A, VBST1/2 = 20V, VFB1/2 = 0.7V 25 50 100 mA Minimum Boost Voltage Ch 1/Ch 2 ISW1/2 = 2A, VBST1/2 = 20V, VFB1/2 = 0.7V (Note 7) 1.4 2.5 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 2:
The LT3510EFE is guaranteed to meet performance specifi cations may cause permanent damage to the device. Exposure to any Absolute from 0°C to 125°C junction temperature. Specifi cations over the –40°C Maximum Rating condition for extended periods may affect device to 125°C operating junction temperature range are assured by design, reliability and lifetime. characterization and correlation with statistical process controls. The 3510fe 3 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY RELATED PARTS