Datasheet LTC3618 (Analog Devices) - 6

LTC3618
Typical perForMance characTerisTics TA = 25°C, VIN = 3.3V, f = 1MHz, Figure 3 Circuit, unless otherwise noted. Load Step Transient in Forced Load Step Transient in Forced Load Step Transient in Continuous Mode, Internal Continuous Mode, Internal Forced Continuous Mode, Compensation Compensation Internal Compensation
VDDQ VTT VTT 500mV/DIV 100mV/DIV 100mV/DIV I I I L L L 1A/DIV 1A/DIV 2A/DIV 3618 G10 V 3618 G11 3618 G12 IN = 5V 10µs/DIV VIN = 5V 20µs/DIV VIN = 5V 20µs/DIV VDDQ = 1.8V VTT = 0.9V VTT = 0.9V ILOAD = –3A TO 3A ILOAD = 0A TO 2A ILOAD = –1A TO 1A
Reference Voltage Switch On-Resistance Switch On-Resistance vs Temperature vs Input Voltage vs Temperature
0.606 0.10 100 0.09 90 0.604 MAIN SWITCH 0.08 80 MAIN SWITCH 0.07 70 0.602 TAGE (V) 0.06 60 (Ω) (mΩ) 0.600 0.05 50 SYNCHRONOUS SWITCH SYNCHRONOUS SWITCH R DS(ON) 0.04 R DS(ON) 40 0.598 0.03 30 REFERENCE VOL 0.02 20 0.596 0.01 10 0.594 0 0 –50 –30 –10 10 30 50 70 90 110 130 2.25 3.25 4.25 5.25 –40 –25 –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3618 G13 3618 G14 3618 G15
Switching Frequency vs Input Frequency vs RT Frequency vs Temperature Voltage
4.5 0.8 2.5 R 0.6 T = SVIN 4.0 2.3 0.4 R 3.5 2.1 T = SVIN 0.2 3.0 1.9 0 1.7 2.5 –0.2 (MHz) 1.5 2.0 –0.4 f OSC 1.3 FREQUENCY (MHz) 1.5 –0.6 1.1 RT = 402kΩ 1.0 FREQUENCY VARIATION (%) –0.8 0.9 0.5 –1.0 0.7 0 –1.2 0.5 0 200 400 600 800 1000 1200 1400 –50 –30 –10 10 30 50 70 90 100 130 2.25 2.75 3.25 3.75 4.25 4.75 5.25 RESISTOR ON RT/SYNC PIN (kΩ) TEMPERATURE (°C) INPUT VOLTAGE (V) 3618 G16 3618 G17 3618 G18 3618fc 6 For more information www.linear.com/LTC3618 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts