Datasheet LTC3622, LTC3622-2, LTC3622-23/5 (Analog Devices) - 7

LTC3622/ LTC3622-2/LTC3622-23/5
TYPICAL PERFORMANCE CHARACTERISTICS VIN1 = VIN2 = 12V, TA = 25°C, unless otherwise noted. Oscillator Frequency Load Step Start-Up Operation vs Temperature
1500 RUN 5V/DIV 1400 VOUT AC-COUPLED I 1300 L 200mV/DIV 200mA/DIV 1200 1100 V 1000 I OUT L 1V/DIV 500mA/DIV 900 TOR FREQUENCY (kHz) PGOOD 800 2V/DIV 700 3622 G10 40µs/DIV 3622 G11 OSCILLA 50µs/DIV 600 VIN = 12V VIN = 12V fSW = 1MHz VOUT = 3.3V 500 Burst Mode OPERATION –100 –50 0 50 100 150 200 LOAD STEP FROM 100mA TO 1A TEMPERATURE (°C) 3622 G12
Oscillator Frequency Reference Voltage vs Supply Voltage vs Temperature RDS(ON) vs Input Voltage
2.50 600.5 600 PMOS CH1 RDS(ON) 2.45 600.0 PMOS CH2 RDS(ON) 2.40 500 NMOS CH1 RDS(ON) NMOS CH2 RDS(ON) 2.35 599.5 2.30 TAGE (mV) 599.0 400 (mΩ) 2.25 2.20 598.5 300 TOR FREQUENCY (MHz) R DS(ON) 2.15 598.0 REFERENCE VOL OSCILLA 2.10 200 597.5 2.05 2.00 597.0 100 0 2 4 6 8 10 12 14 16 18 –50 –30 –10 10 30 50 70 90 110 130 150 0 2 4 6 8 10 12 14 16 18 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3622 G13 3622 G14 3622 G15
RDS(ON) vs Temperature Load Regulation Line Regulation
700 5 0.5 PMOS CHANNEL 1 PULSE SKIP PMOS CHANNEL 2 4 Burst Mode OPERATION 0.4 600 NMOS CHANNEL 1 3 0.3 NMOS CHANNEL 2 2 0.2 500 1 0.1 (mΩ) (%) (%) 400 0 0 OUT OUT ∆V –1 ∆V –0.1 R DS(ON) 300 –2 –0.2 V V –3 IN = 12V –0.3 OUT = 2.5V 200 VOUT = 3.3V ILOAD = 500mA –4 PULSE SKIPPING OPERATION –0.4 fSW = 1MHz fSW = 1MHz PULSE-SKIPPING OPERATION 100 –5 –0.5 –50 –25 0 25 50 75 100 125 150 0 0.2 0.4 0.6 0.8 1.0 1.2 0 3 6 9 12 15 18 TEMPERATURE (°C) LOAD CURRENT (A) INPUT VOLTAGE (V) 3622 G16 3622 G17 3622 G18 Rev D For more information www.analog.com 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts