Datasheet LTC3100 (Analog Devices) - 6

LTC3100
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise specified. Step-Up DC/DC Converter No-Load Input Current vs VIN, Maximum Load Current During Mode = Open, LDO and Buck Off Maximum Output Current vs VIN Start-Up vs VIN
180 600 1000 VOUT = 3.3V 160 500 140 VOUT = 1.8V 120 400 100 100 300 80 VOUT = 5V 60 200 10 INPUT CURRENT (µA) VOUT = 5V LOAD CURRENT (mA) OUTPUT CURRENT (mA) 40 100 20 V V OUT = 1.8V OUT = 3.3V 0 0 1 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 0.7 0.8 0.9 1 1.1 1.2 1.3 V V INBST (V) INBST (V) VINBST (V) 3100 G07 3100 G06 3100 G05 VBST = 1.8V, RESISTIVE LOAD VBST = 1.8V, CONSTANT-CURRENT LOAD VBST = 3.3V, RESISTIVE LOAD VBST = 3.3V, CONSTANT-CURRENT LOAD VBST = 5V, RESISTIVE LOAD VBST = 5V, CONSTANT-CURRENT LOAD
Burst Mode Threshold Current vs VIN Start-Up Voltage vs Temperature
60 0.85 L = 3.3µH 50 0.80 0.75 40 VOUT = 3.3V VOUT = 1.8V 0.70 30 VOUT = 5V 0.65 20 LOAD CURRENT (mA) INPUT VOLTAGE (V) 0.60 10 0.55 0 0.50 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 –45 –30 –15 0 15 30 45 60 75 90 VINBST (V) TEMPERATURE (°C) 3100 G09 3100 G08
Output Voltage Ripple in Fixed VOUT and IIN During Soft-Start Frequency and Burst Mode Operation
VBST COUT = 20µF 0.5µs/DIV 100mA LOAD IIN 20mV/DIV 200mA/DIV 20µs/DIV 5mA LOAD VBST 20mV/DIV 1V/DIV 3100 G10 500µs/DIV 3100 G11 3100fb 6 For more information www.linear.com/LTC3100 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 Typical Application Related Parts