Datasheet LT3083 (Analog Devices) - 7

LT3083
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Load Transient Response Load Transient Response
150 250 V V IN = 2V IN = 2V 100 V V CONTROL = 3V 150 CONTROL = 3V V V OUT = 1V OUT = 1V C 50 CSET = 0.1µF COUT = 22µF CERAMIC 50 SET = 0.1µF –50 COUT = 22µF CERAMIC OUTPUT VOLTAGE DEVIATION (mV) 0 OUTPUT VOLTAGE DEVIATION (mV) –50 –150 COUT = 10µF CERAMIC –100 4 1.0 2 ∆ILOAD = 500mA TO 3A 0.5 0 ∆ILOAD = 100mA TO 1A LOAD CURRENT (A) LOAD CURRENT (A) 0 0 20 40 60 80 100 120 140 160 180 200 0 20 40 60 80 100 120 140 160 180 200 TIME (µs) TIME (µs) 3083 G18 3083 G17
Line Transient Response Turn-On Response Turn-On Response
7 6 4 VOUT = 1V 6 ILOAD = 10mA 5 3 COUT = 10µF CERAMIC 4 5 CSET = 0.1µF 2 3 /V CONTROL 4 /V CONTROL /V CONTROL 1 IN VOLTAGE (V) IN VOLTAGE (V) 2 IN VOLTAGE (V) 3 1 0 10 0 1.0 1.0 0 0.5 0.5 RSET = 20k RSET = 20k C C –10 SET = 0 SET = 0.1µF OUTPUT 0 R OUTPUT 0 R OUTPUT VOLTAGE DEVIATION (mV) LOAD = 0.33Ω LOAD = 1Ω VOLTAGE (V) C VOLTAGE (V) C –20 –0.5 OUT = 10µF CERAMIC –0.5 OUT = 10µF CERAMIC 0 20 40 60 80 100 120 140 160 180 200 0 5 10 15 20 25 30 35 40 45 50 0 2 4 6 8 10 12 14 16 18 20 TIME (µs) TIME (µs) TIME (ms) 3083 G19 3083 G20 3083 G21
Residual Output Voltage with VCONTROL Pin Current VCONTROL Pin Current Less Than Minimum Load
80 70 600 VCONTROL – VOUT = 2V 70 V 60 VIN – VOUT = 1V IN = 20V 500 60 V 50 IN = 10V 400 50 TJ = –50°C 40 VIN = 5V 40 300 ADD 1N4148 FOR PIN CURRENT (mA) ILOAD = 3A PIN CURRENT (mA) 30 R 30 TJ = 25°C TEST < 1k 200 SET PIN = 0V DEVICE IN 20 20 OUTPUT VOLTAGE (mV) VIN VOUT V CONTROL CURRENT LIMIT V CONTROL TJ = 125°C I 100 RTEST 10 LOAD = 1.5A 10 0 0 0 0 2 4 6 8 10 12 14 16 18 0 0.5 1 1.5 2 2.5 3 0 500 1000 1500 2000 IN-TO-OUT DIFFERENTIAL (VIN – VOUT) (V) LOAD CURRENT (A) RSET (Ω) 3083 G22 3083 G23 3083 G24 Rev. B For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts