Datasheet LT3081 (Analog Devices) - 7

LT3081
Typical perForMance characTerisTics TJ = 25°C unless otherwise specified. Linear Regulator Linear Regulator IMON Pin Line Regulation Load Transient Response Load Transient Response
50 150 300 ILOAD = 200mA VIN = 3V COUT = 2.2µF VIN = 3V COUT = 2.2µF 45 100 VOUT = 1V VOUT = 1V C 200 C 40 SET = 0.1µF SET = 0.1µF 50 100 35 30 0 0 25 OUTPUT VOLTAGE DEVIATION (mV) –50 OUTPUT VOLTAGE DEVIATION (mV) –100 20 PIN CURRENT (µA) –100 ∆ILOAD = 100mA TO 500mA –200 15 I MON 400 2.0 ∆I 10 LOAD = 500mA TO 1.5A 5 200 1.0 LOAD LOAD 0 0 0 0 6 12 18 24 30 36 CURRENT (mA) 0 20 40 60 80 100 120 140 160 180 200 CURRENT (mA) 0 20 40 60 80 100 120 140 160 180 200 INPUT-TO-OUTPUT DIFFERENTIAL VOLTAGE (V) TIME (µs) TIME (µs) 3791 TA02b 8081 G19 3081 G20
Linear Regulator Linear Regulator Linear Regulator Load Transient Response Load Transient Response Line Transient Response
200 400 7 VIN = 3V COUT = 0 VIN = 3V COUT = 0 RSET = 20k COUT = 2.2µF 100 VOUT = 1V 200 VOUT = 1V 6 RLOAD = 0.67Ω CSET = 0.1µF CSET = 30pF CSET = 30pF 0 0 5 –100 –200 4 OUTPUT VOLTAGE DEVIATION (mV) OUTPUT VOLTAGE DEVIATION (mV) INPUT VOLTAGE (V) –200 –400 3 ∆ILOAD = 500mA TO 1.5A 600 ∆ILOAD = 100mA TO 500mA 1.5 0.1 400 1.0 0 LOAD 200 LOAD 0.5 –0.1 t t CURRENT (mA) r = tf = 1µs CURRENT (mA) r = tf = 1µs 0 0 OUTPUT VOLTAGE DEVIATION (mV) –0.2 0 5 10 15 20 25 30 35 40 45 50 0 5 10 15 20 25 30 35 40 45 50 0 5 10 15 20 25 30 35 40 45 50 TIME (µs) TIME (µs) TIME (µs) 3081 G21 3081 G22 3081 G23
Current Source Current Source Linear Regulator Line Transient Response Line Transient Response Turn-On Response
6 6 4 RSET = 6.04k RSET = 6.04k 5 ROUT = 3.01Ω 5 ROUT = 0.3Ω 3 COUT = 0 COUT = 0 4 CSET = 30pF 4 CSET = 30pF 2 3 3 1 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 2 2 0 150 1.2 1.0 100 1.0 0.5 RSET = 20k RLOAD = 0.67Ω 50 0.8 0 COUT = 2.2µF CERAMIC 100mA CURRENT SOURCE CONFIGURATION 1A CURRENT SOURCE CONFIGURATION CSET = 0 0 0.6 –0.5 OUTPUT CURRENT (mA) 0 5 10 15 20 25 30 35 40 45 50 OUTPUT CURRENT (A) 0 5 10 15 20 25 30 35 40 45 50 OUTPUT VOLTAGE (V) 0 5 10 15 20 25 30 35 40 45 50 TIME (µs) TIME (µs) TIME (µs) 3081 G24 3081 G25 3081 G26 3081fc For more information www.linear.com/LT3081 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts