Datasheet LT3932, LT3932-1 (Analog Devices) - 6

LT3932/LT3932-1
TYPICAL PERFORMANCE CHARACTERISTICS VIN = 12V, unless otherwise noted. VREF Line Regulation INTVCC and VREF UVLO Threshold Minimum On-Time and Off-Time
2.03 3.3 75 MINIMUM OFF–TIME MINIMUM ON–TIME 2.02 3.0 65 2.7 2.01 150°C 2.4 55 TAGE (V) 2.00 25°C TAGE (V) VOL 2.1 VOL TIME (ns) 45 V REF 1.99 1.8 –50°C 35 1.98 1.5 INTVCC V 1.97 REF 1.2 25 0 6 12 18 24 30 36 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3932 G10 3932 G11 3932 G12
RP and RT Pin Current Limit SS Pin Pull-Up Current SS Thresholds
70 24 2.0 23 60 1.6 22 50 21 1.2 LOWER RISING 20 LOWER FALLING TAGE (V) UPPER RISING 40 0.8 UPPER FALLING CURRENT (µA) 19 SS CURRENT (µA) SS VOL 18 30 0.4 R 17 P Current RT Current 20 16 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3932 G13 3932 G14 3932 G15
SW Frequency Internal PWM Frequency PWM Duty Ratio
2200 260 10 110 INTERNAL PWM R 100 R T = 45.3k T = 45.3k 90 2000 240 80 70 60 1800 220 1 TIO (%) 50 40 RT = 523k DUY RA 30 SW FREQUENCY (kHz) 1600 200 PWM FREQUENCY (kHz) 20 10 0 EXTERNAL PWM 1400 180 0.1 –10 –50 –25 0 25 50 75 100 125 150 10k 100k 1M 0 0.5 1 1.5 2 2.5 3 TEMPERATURE (°C) RP RESISTANCE (Ω) PWM VOLTAGE (V) 3932 G16 3932 G17 3932 G18 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 Typical Applications Package Description Revision History Typical Application Related Parts