Datasheet LT3501 (Analog Devices) - 3

LT3501
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. VVIN1/2 = 15V, VBST1/2 = open, VRT/SYNC = 2V, VVOUT1/2 = open, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS
Feedback Bias Current Ch 1/Ch 2 VFB1/2 = 0.8V, VVC1/2 = 1V l –250 75 250 nA Error Amplifier gm Ch 1/Ch 2 VVC1/2 = 1V, IVC1/2 = ±5µA l 150 275 450 µmho Error Amplifier Gain Ch 1/Ch 2 1000 V/V Error Amplifier to Switch Gain Ch 1/Ch 2 3.3 A/V Error Amplifier Source Current Ch 1/Ch 2 VFB1/2 = 0.6V, VVC1/2 = 1V 10 15 25 µA Error Amplifier Sink Current Ch 1/Ch 2 VFB1/2 = 1V, VVC1/2 = 1V 15 20 30 µA Error Amplifier High Clamp Ch 1/Ch 2 VFB1/2 = 0.7V 1.75 2.0 2.25 V Error Amplifier Switching Threshold Ch 1/Ch 2 VOUT1/2 = 5V, RT/SYNC = 133k 0.5 0.7 1 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 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 Frequency = 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 3.25 4 5 A VVOUT1/2 = 5V (Note 6), RT/SYNC = 133k, VBST1/2 = 20V 3.5 4 5 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 = 3A, VBST1/2 = 20V, VFB1/2 = 0.7V l 250 600 mV Boost Current Ch 1/Ch 2 ISW1/2 = 3A, VBST1/2 = 20V, VFB1/2 = 0.7V 25 60 100 mA Minimum Boost Voltage Ch 1/Ch 2 ISW1/2 = 3A, VBST1/2 = 20V, VFB1/2 = 0.7V 1.4 2.5 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings characterization and correlation with statistical process controls. The may cause permanent damage to the device. Exposure to any Absolute LT3501IFE is guaranteed and tested over the full –40°C to 125°C operating Maximum Rating condition for extended periods may affect device junction temperature range. reliability and lifetime.
Note 3:
Minimum input voltage is defined as the voltage where internal
Note 2:
The LT3501EFE is guaranteed to meet performance specifications bias lines are regulated so that the reference voltage and oscillator remain from 0°C to 125°C junction temperature. Specifications over the –40°C constant. Actual minimum input voltage to maintain a regulated output will to 125°C operating junction temperature range are assured by design, depend upon output voltage and load current. See Applications Information. 3501fd 3 Document Outline Features Applications Description 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