Datasheet LTC3126 (Analog Devices) - 7

LTC3126
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. VCC Dropout Voltage vs Temperature VCC Load Regulation Switching Frequency vs RT
120 4 3000 110 3 100 2 90 TAGE (mV) (%) 1 CC 1000 80 0 70 –1 DROPOUT VOL CHANGE IN V 60 –2 V CC V SWITCHING FREQUENCY (kHz) IN = 2.5V 50 I –3 CC = 5mA 40 –4 100 –50 –25 0 25 50 75 100 125 150 0 4 8 12 16 20 10 20 100 200 300 TEMPERATURE (°C) ICC (mA) RT (kΩ) 3126 G19 3126 G20 3126 G21
Reverse Current Out of the Switching Frequency Power Switch Resistance vs Unused Input (VIN1 or VIN2) vs Temperature Temperature
1.5 5.0 350 fSW = 700kHz 4.0 TOP f 300 SWITCH SW = 2MHz 3.0 2.0 250 1.0 ANCE (mΩ) 1.0 200 FROM 25°C (%) 0 SW 150 –1.0 BOTTOM SWITCH 0.5 –2.0 100 VOUT = 3.3V V –3.0 IN = 24V CHANGE IN F I POWER SWITCH RESIST 50 LOAD = 2A –4.0 CURRENT OUT OF THE UNUSED INPUT (mA) 0 –5.0 0 0 0.4 0.8 1.2 1.6 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VOLTAGE ON THE UNUSED INPUT (V) TEMPERATURE (°C) TEMPERATURE (°C) 3126 G22 3126 G23 3126 G24
Minimum On-Time High Side Current Limit Temperature Rise vs Temperature Threshold vs Temperature vs Load Current
60 4.5 60 VIN = 12V VIN = 24V 50 56 4.2 VIN = 36V 40 52 3.9 30 TURE RISE (°C) 48 3.6 20 TEMPERA SW MINIMUM ON-TIME (ns) 44 3.3 EXTVCC = OPEN HIGH SIDE CURRENT LIMIT (A) 10 fSW = 1MHz VOUT = 3.3V VOUT = 3.3V LOAD = 1A ON DEMO PCB 40 3.0 0 –50 –25 0 25 50 75 100 125 150 –50 0 50 100 150 0.5 1 1.5 2 2.5 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (A) 3126 G25 3126 G26 3126 G27 3126f For more information www.linear.com/LTC3126 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Quick Reference Operation Applications Information Typical Applications Package Description Typical Application Related Parts