Datasheet LT1185 (Analog Devices) - 4

LT1185
W U TYPICAL PERFOR A CE CHARACTERISTICS Feedback Pin Voltage Internal Current Limit Quiescent Ground Pin Current* Temperature Drift
5 12 2.41 ILOAD = 0 TJ = 25°C 2.40 10 4 GUARANTEED 2.39 LIMIT *DOES NOT INCLUDE REF CURRENT 8 OR OUTPUT DIVIDER CURRENT 2.38 3 6 2.37 TYPICAL 2 VOLTAGE (V) 2.36 4 OUTPUT CURRNT (A) V 2.35 OUT = 5V 1 GUARANTEED GROUND PIN CURRENT (mA) LIMIT 2 2.34 TEST POINTS 0 0 2.33 0 5 10 15 20 25 30 0 5 10 15 20 25 30 35 –50 –25 0 25 50 75 100 125 150 INPUT-OUTPUT DIFFERENTIAL (V) INPUT VOLTAGE (V) JUNCTION TEMPERATURE (°C) LT1185 • TPC03 LT1185 • TPC01 LT1185 • TPC02
Ground Pin Current Ripple Rejection vs Frequency
160 –100 TJ = 25°C 140 –80 120 ALL OUTPUT 100 (dB) VOLTAGES IN –60 WITH 0.05µF /V REGULATOR JUST AT 80 ACROSS R2 DROPOUT POINT OUT –40 CURRENT (mA) 60 VOUT = 5V RATIO V VIN – VOUT = 1.5V 40 V –20 IN – VOUT = 5V 20 0 0 0 1 2 3 4 100 1k 10k 100k 1M LOAD CURRENT (A) FREQUENCY (Hz) LT1185 • TPC04 LT1185 • TPC05
Load Transient Response Output Impedance
10 OUTPUT IMPEDANCE IS COUT = 2.2µF, ESR = 1Ω SET BY OUTPUT CAPACITOR ESR IN THIS REGION 1 100mV ) Ω COUT = 2.2µF, ESR = 2Ω 0.1 VOUT = 5V IOUT = 1A IMPEDANCE ( 0.01 ∆I V LOAD 0.1A t OUT = 5V r,f ≤ 100ns IOUT = 1A COUT = 2.2µF 0.001 0 2 4 6 8 10 12 14 16 1k 10k 100k 1M TIME (µs) FREQUENCY (Hz) LT1183 • TPC07 LT1185 • TPC06 1185ff 4