Datasheet LTC7151S (Analog Devices) - 5

LTC7151S
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, VOUT = 1.0V, unless otherwise noted. RDSON vs Temperature Switching Frequency vs RT Valley Current Limit vs VITH
18 3.5 20 16 3.0 15 14 2.5 10 12 5 2.0 10 (mΩ) ON 0 8 1.5 RDS –5 6 1.0 4 –10 SWITCHING FREQUENCY (MHz) VALLEY CURRENT LIMIT (A) 0.5 2 BOT FET –15 TOP FET 0 0 –20 –50 –25 0 25 50 75 100 125 0 50 100 150 200 250 300 350 400 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 TEMPERATURE (°C) RT (kΩ) VITH (V) 7151S G10 7151S G11 7151S G12
Valley Current Limit vs Temperature Die Temperature vs Load, CCM Switching Frequency vs VOUT
19.0 60 1.4 PVIN = 12V RT = 162kΩ SVIN = 5V 18.5 55 VOUT = 1V 1.3 fSW = 1MHz 50 18.0 1.2 TURE (°C) 45 17.5 40 1.1 17.0 FREQUENCY (MHz) 35 DIE TEMPERA VALLEY CURRENT LIMIT (A) 1.0 16.5 30 DEMO BOARD IN STILL AIR, TA = 25°C 16.0 25 0.9 –50 –25 0 25 50 75 100 125 0 3 6 9 12 15 0 2 4 6 8 10 TEMPERATURE (°C) LOAD CURRENT (A) VOUT (V) 7151S G13 7151S G14 7151S G15
Regulated FB Voltage RUN Rising Threshold vs Temperature vs Temperature Frequency vs Temperature
505 1.220 1.10 RT = 162kΩ 1.215 503 1.05 1.210 TAGE (mV) 501 1.205 1.00 499 TED FB VOL 1.200 FREQUENCY (MHz) 0.95 REGULA 497 RUN RISING THRESHOLD (V) 1.195 495 1.190 0.90 –50 –25 0 25 50 75 100 125 –55 –35 –15 5 25 45 65 85 105 125 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 7151S G16 7151S G17 7151S G18 Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Photo Typical Application Related Parts