Datasheet LTC3409A (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 600mA Low VIN Buck Regulator in 3mm × 3mm DFN |
| Pages / Page | 16 / 5 |
| File Format / Size | PDF / 321 Kb |
| Document Language | English |
Model Line for this Datasheet
Text Version of Document
LTC3409A
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, from Typical Application on the front page except for the resistive divider resistor values) Output Voltage vs Load Current VIN = 1.6V RDS(ON) vs Input Voltage RDS(ON) vs Temperature
1.210 0.45 0.55 0.40 0.50 1.6V 1.205 IN 0.35 MAIN 0.45 1.2VOUT, BURST SWITCH 4.2VIN 1.200 0.30 0.40 1.2VOUT, PULSE-SKIPPING 2.7VIN TAGE (V) (Ω) 0.25 (Ω) 0.35 1.6VIN 1.195 0.20 0.30 DS(0N) DS(ON) R SYNCHRONOUS R 2.7VIN 1.190 0.15 SWITCH 0.25 OUTPUT VOL 4.2VIN 0.10 0.20 1.185 0.05 0.15 MAIN SWITCH SYNCHRONOUS SWITCH 1.100 0 0.10 1 10 100 1000 1.5 2.5 3.5 4.5 5.5 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) INPUT VOLTAGE (V) TEMPERATURE (°C) 3409A G09 3409A G10 3409A G11
Dynamic Supply Current Dynamic Input Current vs Temperature, VIN = 3.6V, vs Input Voltage VOUT = 1.5V, No Load
3500 90 500 VOUT = 1.5V I 450 OUT = 0 80 3000 Burst Mode OPERA DYNAMIC SUPPL , BURST 400 70 V PULSE-SKIPPING FB = 1V 2500 350 60 300 2000 50 Y CURRENT (μA) 250 Y CURRENT 1500 40 TION (μA) 200 VOUT = 1.5V 30 1000 IOUT = 0 150 DYNAMIC INPUT CURRENT PULSE-SKIPPING MODE (μA) 20 , 100 BURST 500 PULSE-SKIPPING DYNAMIC SUPPL 10 50 VFB = 1V 0 0 0 1.5 2.5 3.5 4.5 5.5 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) TEMPERATURE (°C) 3409A G12 3409A G13
Switch Leakage vs Temperature VIN = 5.5V Switch Leakage vs Input Voltage
6000 45 40 5000 35 4000 30 25 3000 MAIN SWITCH MAIN SWITCH 20 2000 15 SWITCH LEAKAGE (nA) SWITCH LEAKAGE (nA) SYNCHRONOUS SWITCH 10 1000 SYNCHRONOUS 5 SWITCH 0 0 –50 –25 0 25 50 75 100 125 0 2 4 6 TEMPERATURE (°C) INPUT VOLTAGE (V) 3409A G14 3409A G15 3409af 5
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, from Typical Application on the front page except for the resistive divider resistor values) Output Voltage vs Load Current VIN = 1.6V RDS(ON) vs Input Voltage RDS(ON) vs Temperature
1.210 0.45 0.55 0.40 0.50 1.6V 1.205 IN 0.35 MAIN 0.45 1.2VOUT, BURST SWITCH 4.2VIN 1.200 0.30 0.40 1.2VOUT, PULSE-SKIPPING 2.7VIN TAGE (V) (Ω) 0.25 (Ω) 0.35 1.6VIN 1.195 0.20 0.30 DS(0N) DS(ON) R SYNCHRONOUS R 2.7VIN 1.190 0.15 SWITCH 0.25 OUTPUT VOL 4.2VIN 0.10 0.20 1.185 0.05 0.15 MAIN SWITCH SYNCHRONOUS SWITCH 1.100 0 0.10 1 10 100 1000 1.5 2.5 3.5 4.5 5.5 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) INPUT VOLTAGE (V) TEMPERATURE (°C) 3409A G09 3409A G10 3409A G11
Dynamic Supply Current Dynamic Input Current vs Temperature, VIN = 3.6V, vs Input Voltage VOUT = 1.5V, No Load
3500 90 500 VOUT = 1.5V I 450 OUT = 0 80 3000 Burst Mode OPERA DYNAMIC SUPPL , BURST 400 70 V PULSE-SKIPPING FB = 1V 2500 350 60 300 2000 50 Y CURRENT (μA) 250 Y CURRENT 1500 40 TION (μA) 200 VOUT = 1.5V 30 1000 IOUT = 0 150 DYNAMIC INPUT CURRENT PULSE-SKIPPING MODE (μA) 20 , 100 BURST 500 PULSE-SKIPPING DYNAMIC SUPPL 10 50 VFB = 1V 0 0 0 1.5 2.5 3.5 4.5 5.5 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) TEMPERATURE (°C) 3409A G12 3409A G13
Switch Leakage vs Temperature VIN = 5.5V Switch Leakage vs Input Voltage
6000 45 40 5000 35 4000 30 25 3000 MAIN SWITCH MAIN SWITCH 20 2000 15 SWITCH LEAKAGE (nA) SWITCH LEAKAGE (nA) SYNCHRONOUS SWITCH 10 1000 SYNCHRONOUS 5 SWITCH 0 0 –50 –25 0 25 50 75 100 125 0 2 4 6 TEMPERATURE (°C) INPUT VOLTAGE (V) 3409A G14 3409A G15 3409af 5
