Datasheet LTC3409A (Analog Devices) - 4

LTC3409A
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, from Typical Application on the front page except for the resistive divider resistor values) Pulse-Skipping Effi ciency/Power Effi ciency vs Input Voltage, Lost vs Load Current, VOUT = 1.8V VOUT = 1.2V, Burst Mode Operation
100 1 100 EFFICIENCY 90 90 VIN = 3.6V 80 80 V 70 IN = 4.2V POWER LOST (W) 70 0.1 60 60 VIN = 2.5V 50 50 40 40 EFFICIENCY (%) VIN = 4.2V 0.01 EFFICIENCY (%) 30 30 V 20 IN = 2.5V VIN = 3.6V 20 IOUT = 0.1mA IOUT = 100mA 10 POWER LOST 10 IOUT = 1mA IOUT = 600mA IOUT = 10mA 0 0.001 0 0 1 10 100 1000 1.6 2.6 3.6 4.6 5.5 LOAD CURRENT (mA) INPUT VOLTAGE (VIN) 3409A G01 3409A G02
Effi ciency vs Input Voltage Effi ciency vs Load Current, Effi ciency vs Load Current, VOUT = 1.2V, Pulse-Skipping V V OUT = 2.5V OUT = 1.2V
100 100 100 I 90 OUT = 100mA 90 90 1.6VIN I 2.7V 2.5V OUT = 600mA IN IN 80 80 80 4.2VIN 70 70 70 3.1VIN 60 60 3.1VIN 3.6V 60 IN 4.2V I IN 50 OUT = 10mA 50 50 2.5VIN 40 40 40 1.6VIN EFFICIENCY (%) IOUT = 1mA EFFICIENCY (%) EFFICIENCY (%) 30 30 2.7VIN 30 3.6VIN 20 20 20 10 IOUT = 0.1mA 10 BURST 10 BURST PULSE-SKIPPING PULSE-SKIPPING 0 0 0 1.5 2.5 3.5 4.5 5.5 0.1 1 10 100 1000 0.1 1 10 100 1000 INPUT VOLTAGE (VIN) LOAD CURRENT (mA) LOAD CURRENT (mA) 3409A G03 3409A G04 3409A G05
Reference Voltage Oscillator Frequency Oscillator Frequency Shift vs Temperature vs Temperature vs Input Voltage
0.616 2.7 6 2.6 VIN = 2.7V 0.615 4 2.5 (%) fLOW 2.4 T V 1.7MHz IN = 1.6V 0.614 2 2.3 VIN = 4.2V 2.2 OSC 2.6MHz 0.613 0 TAGE (V) 2.1 fHIGH 2.0 2.6MHz 0.612 –2 1.9 OSC 1.7MHz 1.8 VIN = 4.2V 0.611 TOR FREQUENCY (MHz) –4 1.7 TOR FREQUENCY SHIF 1.6 REFERENCE VOL 0.610 –6 VIN = 2.7V OSCILLA 1.5 VIN = 1.6V 0.609 1.4 OSCILLA –8 1.3 0.608 1.2 –10 –50 –30 –10 10 30 50 70 90 110 125 –50 –25 0 25 50 75 100 125 1.5 2.5 3.5 4.5 5.5 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3409A G06 3409A G07 3409A G08 3409af 4