Datasheet LT8610AC, LT8610AC-1 (Analog Devices) - 6

LT8610AC/LT8610AC-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Dropout Voltage Switching Frequency Burst Frequency
800 740 800 RT = 60.4k VIN = 12V (LT8610AC) V 700 730 OUT = 3.3V 700 L = 4.7µH 600 720 600 (LT8610AC) 500 710 500 400 700 400 300 690 300 DROPOUT VOLTAGE (mV) 200 680 200 SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHz) 100 670 100 0 660 0 0 0.5 1 1.5 2 2.5 3 3.5 –55 –25 5 35 65 95 125 155 0 100 200 300 400 500 600 700 800 LOAD CURRENT (A) TEMPERATURE (°C) LOAD CURRENT (mA) 8610ac1 G19 8610ac1 G20 8610ac1 G21
Minimum Load to Full Frequency Frequency Foldback Soft-Start Tracking
80 800 1.0 VOUT = 3.3V VOUT = 3.3V 70 fSW = 700kHz 700 VIN = 12V PULSE-SKIPPING MODE VSYNC = 0V 0.8 60 (LT8610AC) 600 RT = 60.4k (LT8610AC) 50 500 0.6 40 400 30 300 0.4 FB VOLTAGE (V) LOAD CURRENT (mA) 20 200 SWITCHING FREQUENCY (kHz) 0.2 10 100 0 0 0 5 10 15 20 25 30 35 40 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.2 0.4 0.6 0.8 1.0 1.2 INPUT VOLTAGE (V) FB VOLTAGE (V) TR/SS VOLTAGE (V) 8610ac1 G22 8610ac1 G23 8610ac1 G24
Soft-Start Current PG High Thresholds PG Low Thresholds
2.4 10.0 –6.0 VSS = 0.5V 2.3 (%) 9.5 (%) –6.5 REF REF 2.2 9.0 –7.0 2.1 8.5 –7.5 FB RISING 2.0 8.0 FB RISING –8.0 FB FALLING 1.9 7.5 –8.5 FB FALLING SS PIN CURRENT (µA) 1.8 7.0 –9.0 1.7 6.5 –9.5 PG THRESHOLD OFFSET FROM V PG THRESHOLD OFFSET FROM V 1.6 6.0 –10.0 –50 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8610ac1 G25 8610ac1 G26 8610ac1 G27 Rev. B 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts