Datasheet LT3686A (Analog Devices) - 6

LT3686A
typicAl perForMAnce chArActeristics TA = 25°C unless otherwise noted. 3.3VOUT Typical Minimum Input 5VOUT Typical Minimum Input Voltage Voltage Continuous Mode Waveform
7 8 6 7 MODE/SYNC < 0.4 V 6 SW 5 MODE/SYNC < 0.4 2V/DIV MODE/SYNC > 0.8 5 IL 4 MODE/SYNC > 0.8 200mA/DIV (V) (V) 4 V IN 3 V IN 200ns/DIV 3686A G20 3 VIN = 10V 2 VOUT = 3.3V 2 L = 6.8µH V V f = 2MHz 1 OUT = 3.3V OUT = 5V L = 15µH 1 L = 22µH COUT = 22µF f = 1MHz f = 1MHz ILOAD = 200mA 0 0 MODE/SYNC = 0V 1 10 100 1000 1 10 100 1000 ILOAD (mA) ILOAD (mA) 3686A G18 3686A G19
Light Load Discontinuous Mode Fixed Frequency No Load Start-Up Shutdown Waveform Waveform Waveform ILOAD = 5mA
VIN 1V/DIV VSW VSW 2V/DIV 2V/DIV VOUT IL IL 1V/DIV 200mA/DIV 200mA/DIV 200ns/DIV 3686A G21 200ns/DIV 3686A G22 200ms/DIV 3686A G23 VIN = 10V VIN = 10V VOUT = 5V VOUT = 3.3V VOUT = 3.3V L = 22µH L = 6.8µH L = 6.8µH f = 1MHz f = 2MHz f = 2MHz ILOAD = 5mA COUT = 22µF COUT = 22µF MODE/SYNC = 0V ILOAD = 25mA ILOAD = 0mA MODE/SYNC = 0V MODE/SYNC = 3.3V
Start-Up Shutdown Waveform Start-Up Shutdown Waveform Start-Up Shutdown Waveform ILOAD = 5mA ILOAD = 500mA ILOAD = 500mA
VIN VIN VIN 1V/DIV 1V/DIV 1V/DIV VOUT VOUT VOUT 1V/DIV 1V/DIV 1V/DIV 200ms/DIV 3686A G24 200ms/DIV 3686A G25 200ms/DIV 3686A G26 VOUT = 5V VOUT = 5V VOUT = 5V L = 22µH L = 22µH L = 22µH f = 1MHz f = 1MHz f = 1MHz ILOAD = 5mA ILOAD = 500mA ILOAD = 500mA MODE/SYNC = 1V MODE/SYNC = 0V MODE/SYNC = 1V 3686afa 6 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