Datasheet LT3085 (Analog Devices) - 6

LT3085
TYPICAL PERFORMANCE CHARACTERISTICS Residual Output Voltage with VCONTROL Pin Current VCONTROL Pin Current Less Than Minimum Load
20 8 800 VIN = VCONTROL = 2V T 18 J = –50°C SET PIN = 0V 7 VIN = VOUT = 1V 700 VIN V VIN = 20V 16 OUT 6 600 14 RTEST TJ = 25°C 5 500 12 ILOAD = 500mA TAGE (mV) 10 4 400 TJ = 125°C VIN = 10V 8 DEVICE IN 3 300 CURRENT LIMIT V 6 IN = 5V 2 OUTPUT VOL 200 CONTROL PIN CURRENT (mA) 4 CONTROL PIN CURRENT (mA) 1 100 2 ILOAD = 1mA 0 0 0 0 6 12 18 24 30 36 0 0.1 0.2 0.3 0.4 0.5 0 1k 2k INPUT-TO-OUTPUT DIFFERENTIAL (V) LOAD CURRENT (A) RTEST (Ω) 3085 G19 3085 G20 3085 G21
Ripple Rejection - Dual Supply Ripple Rejection - Dual Supply Ripple Rejection - Single Supply - VCONTROL Pin - IN Pin
100 100 100 90 90 90 ILOAD = 100mA ILOAD = 100mA 80 80 80 ILOAD = 100mA 70 70 70 ILOAD = 500mA N (dB) 60 O 60 60 I TI LOAD = 500mA C ILOAD = 500mA 50 50 50 40 40 40 30 30 VIN = VOUT (NOMINAL) + 1V 30 VIN = VCONTROL +2V RIPPLE REJECTION (dB) V RIPPLE REJE VCONTROL = VOUT (NOMINAL) +2V RIPPLE REJECTION (dB) V IN = VCONTROL = VOUT (NOMINAL) +2V CONTROL = VOUT (NOMINAL) +2V 20 RIPPLE = 50mV 20 RIPPLE = 50mVP–P 20 RIPPLE = 50mV P–P P–P COUT = 2.2μF CERAMIC C 10 COUT = 2.2μF CERAMIC 10 10 OUT = 2.2μF CERAMIC C CSET = 0.1μF CERAMIC C SET = 0.1μF CERAMIC SET = 0.1μF CERAMIC 0 0 0 10 100 1k 10k 100k 1M 10 100 1k 10k 100k 1M 10 100 1k 10k 100k 1M FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) 3085 G22 3085 G23 3085 G24
Ripple Rejection (120Hz) Noise Spectral Density Output Voltage Noise
85 10k 1k 84 SPECTRAL DENSITY ( REFERENCE CURRENT NOISE V 83 1k 100 OUT 100μV/DIV 82 81 100 10 TIME 1ms/DIV 3085 G27 80 p V A/ √Hz) OUT = 1V SINGLE SUPPLY OPERATION RSET = 100k RIPPLE REJECTION (dB) 79 VIN = VOUT (NOMINAL) +2V ERROR AMPLIFIER NOISE 10 1.0 CSET = O.1μF RIPPLE = 50mV SPECTRAL DENSITY (nV/√Hz) C P–P, f = 120Hz OUT = 10μF 78 I I LOAD = 0.1A LOAD = 0.5A COUT = 2.2μF, CSET = 0.1μF 77 1 0.1 –50 –25 0 25 50 75 100 125 150 10 100 1k 10k 100k FREQUENCY (Hz) FREQUENCY (Hz) 3085 G25 3085 G26 3085fb 6 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION 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