Datasheet LT3686A (Analog Devices) - 4

LT3686A
typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. 3.3VOUT Efficiency (2MHz) 5VOUT Efficiency 3.3VOUT Maximum Load Current
90 90 2.0 80 80 MODE/SYNC > 0.8V 1.8 TYPICAL MODE/SYNC > 0.8V 70 70 1.6 60 60 1.4 MINIMUM 1.2 50 50 MODE/SYNC < 0.4V MODE/SYNC < 0.4V (A) 1.0 40 40 I OUT 0.8 EFFICIENCY (%) 30 EFFICIENCY (%) 30 0.6 20 VIN = 12V 20 VIN = 12V V 0.4 OUT = 3.3V VOUT = 5V VOUT = 3.3V 10 L = 6.8µH 10 L = 10µH 0.2 L = 6.8µH f = 2MHz f = 2MHz f = 2MHz 0 0 0 0 200 400 600 800 1000 1200 0 200 400 600 800 1000 1200 0 10 20 30 40 LOAD CURRENT (mA) LOAD CURRENT (mA) VIN (V) 3686A G01 3686A G02 3686A G03
Internal Undervoltage Lockout 5VOUT Maximum Load Current Switch Voltage Drop (UVLO)
2.0 900 4.0 1.8 TYPICAL 800 1.6 700 3.5 1.4 MINIMUM 600 1.2 (A) 500 1.0 (mV) (V) 3.0 I OUT 400 V IN 0.8 V SW 300 0.6 150°C 2.5 0.4 200 VOUT = 5V 125°C 0.2 L = 10µH 100 25°C f = 2MHz –50°C 0 0 2.0 10 20 30 40 0 500 1000 1500 2000 2500 –50 0 50 100 150 VIN (V) ISW (mA) TEMPERATURE (°C) 3686A G04 3686A G05 3686A G06
Overvoltage Lockout (OVLO) VFB vs Temperature
40 820 39 810 38 (V) (mV) 800 V IN 37 V FB 790 36 35 780 –50 0 50 100 150 –50 0 50 100 150 TEMPERATURE (°C) TEMPERATURE (°C) 3686A G07 3686A G08 3686afa 4 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts