Datasheet LT3091 (Analog Devices) - 9

LT3091
Typical perForMance characTerisTics TJ = 25°C, unless otherwise noted. Programmable Brick-Wall Current Limit Internal Current Limit Internal Current Limit
1.4 2.0 100 RILIM = 40k RILIM = 13.3k RILIM = 20k 1.8 90 1.2 1.6 80 1.0 1.4 70 1.2 60 TAGE (V) 0.8 1.0 50 0.6 0.8 40 OUTPUT VOL 0.4 CURRENT LIMIT (A) 0.6 CURRENT LIMIT (mA) 30 0.4 20 0.2 RSET = 25k 0.2 VIN = –1.9V 10 VIN = –36V V VOUT = 0V V IN = –3V OUT = 0V 0 0 0 0 0.5 1.0 1.5 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 OUTPUT CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 3091 G29 3091 G30 3091 G31
Internal Current Limit Input Ripple Rejection Input Ripple Rejection
2.0 80 90 –55°C –3.5VIN IL = 1.5A 1.8 25°C 70 –4VIN 80 IL = 500mA 1.6 125°C IL = 100mA 150°C 60 70 1.4 60 1.2 50 50 1.0 40 40 0.8 30 CURRENT LIMIT (A) 30 0.6 RIPPLE REJECTION (dB) 20 V RIPPLE REJECTION (dB) V 0.4 OUT = –2.5V 20 OUT = –2.5V ILOAD = 1.5A VIN = –3.5V 0.2 10 CSET = 0.1µF 10 CSET = 0.1µF VOUT = 0V INPUT RIPPLE = 50mVRMS INPUT RIPPLE = 50mVRMS 0 0 0 0 –6 –12 –18 –24 –30 –36 10 100 1k 10k 100k 1M 10M 10 100 1k 10k 100k 1M 10M INPUT-TO-OUTPUT DIFFERENTIAL (V) FREQUENCY (Hz) FREQUENCY (Hz) 3091 G32 3091 G33 3091 G34
Input Ripple Rejection Ripple Rejection (120Hz) RMS Output Noise
100 100 1000 COUT = 10µF, CSET = 0.1µF 90 COUT = 10µF, CSET = 0.47µF 80 COUT = 22µF, CSET = 0.1µF 95 ) 70 90 V RMS 60 50 85 100 40 80 30 V RIPPLE REJECTION (dB) IN = –4V V RIPPLE REJECTION (dB) V OUTPUT NOISE (µ 20 OUT = –2.5V OUT = –2.5V ILOAD = 1.5A 75 ILOAD = 1.5A 10 CSET = 0.1µF CSET = 0.47µF INPUT RIPPLE = 50mVRMS COUT = 10µF 0 70 10 10 100 1k 10k 100k 1M 10M –75 –50 –25 0 25 50 75 100 125 150 0.1 1 10 100 1000 FREQUENCY (Hz) TEMPERATURE (°C) SET PIN CAPACITANCE (nF) 3091 G35 3091 G36 3091 G7 3091fa For more information www.linear.com/LT3091 9 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