Datasheet LTC3672B-1 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Monolithic Fixed-Output 400mA Buck Regulator with Dual 150mA LDOs in 2mm x 2mm DFN |
| Pages / Page | 12 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. … |
| File Format / Size | PDF / 176 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. VIN1-LDO1 Dropout Voltage
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LTC3672B-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. VIN1-LDO1 Dropout Voltage VIN-LDO2 Dropout Voltage vs Load vs Load LDO1 Short Circuit Current vs VIN1
600 300 500 VIN = 5.5V 450 500 250 400 130°C 25°C 350 400 200 25°C 300 TAGE (mV) TAGE (mV) 300 150 250 –45°C –45°C T CIRCUIT CURRENT (mA) 200 200 100 150 DROPOUT VOL 130°C DROPOUT VOL 100 100 50 –45°C LDO1 SHOR 50 25°C 90°C 0 0 0 0 25 50 75 100 125 150 0 25 50 75 100 125 150 0 1 2 3 4 5 6 LDO1 LOAD (mA) LDO2 LOAD (mA) VIN1 (V) 3672b1 G10 3672b1 G11 3672b1 G12
Buck Oscillator Frequency vs LDO1 Short Circuit Current vs VIN LDO2 Short Circuit Current vs VIN Temperature
500 600 V 2.6 IN1 = 1.8V 500 2.5 400 2.4 400 VIN = 5.5V V 300 IN = 4.2V 2.3 300 2.2 VIN = 3.6V T CIRCUIT CURRENT (mA) 200 T CIRCUIT CURRENT (mA) 200 FREQUENCY (MHz) 2.1 100 VIN = 2.9V –45°C 100 –45°C LDO1 SHOR 2.0 25°C LDO2 SHOR 25°C 90°C 90°C 0 0 1.9 2.5 3.0 3.5 4.0 4.5 5.0 5.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –50 –30 –10 10 30 50 70 90 110 130 VIN (V) VIN (V) TEMPERATURE (°C) 3672b1 G13 3672b1 G14 3672b1 G15
PMOS Switch Maximum Peak Current Buck PMOS Switch On-Resistance Startup Transient
1000 900 130°C 800 VOUT3 90°C OUTPUT 700 V 900 VOLTAGES OUT1 VOUT1 25°C 500mV/DIV 600 ANCE (mΩ) V 500 –45°C OUT2 800 0V 400 1V ENALL 0V 300 50μs/DIV 3672b1 G18 700 PMOS ON-RESIST 200 FRONT PAGE APPLICATION VIN = 2.9V VIN = 3.6V V 100 10mA RESISTIVE LOAD ON EACH OUTPUT PMOS SWITCH MAX PEAK CURRENT (mA) IN = 3.6V V 600 IN = 5.5V 0 –50 –30 –10 10 30 50 70 90 110 130 2.5 3.0 3.5 4.0 4.5 5.0 5.5 TEMPERATURE (°C) VIN (V) 3672b1 G16 3672b1 G17 3672B1f 5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. VIN1-LDO1 Dropout Voltage VIN-LDO2 Dropout Voltage vs Load vs Load LDO1 Short Circuit Current vs VIN1
600 300 500 VIN = 5.5V 450 500 250 400 130°C 25°C 350 400 200 25°C 300 TAGE (mV) TAGE (mV) 300 150 250 –45°C –45°C T CIRCUIT CURRENT (mA) 200 200 100 150 DROPOUT VOL 130°C DROPOUT VOL 100 100 50 –45°C LDO1 SHOR 50 25°C 90°C 0 0 0 0 25 50 75 100 125 150 0 25 50 75 100 125 150 0 1 2 3 4 5 6 LDO1 LOAD (mA) LDO2 LOAD (mA) VIN1 (V) 3672b1 G10 3672b1 G11 3672b1 G12
Buck Oscillator Frequency vs LDO1 Short Circuit Current vs VIN LDO2 Short Circuit Current vs VIN Temperature
500 600 V 2.6 IN1 = 1.8V 500 2.5 400 2.4 400 VIN = 5.5V V 300 IN = 4.2V 2.3 300 2.2 VIN = 3.6V T CIRCUIT CURRENT (mA) 200 T CIRCUIT CURRENT (mA) 200 FREQUENCY (MHz) 2.1 100 VIN = 2.9V –45°C 100 –45°C LDO1 SHOR 2.0 25°C LDO2 SHOR 25°C 90°C 90°C 0 0 1.9 2.5 3.0 3.5 4.0 4.5 5.0 5.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –50 –30 –10 10 30 50 70 90 110 130 VIN (V) VIN (V) TEMPERATURE (°C) 3672b1 G13 3672b1 G14 3672b1 G15
PMOS Switch Maximum Peak Current Buck PMOS Switch On-Resistance Startup Transient
1000 900 130°C 800 VOUT3 90°C OUTPUT 700 V 900 VOLTAGES OUT1 VOUT1 25°C 500mV/DIV 600 ANCE (mΩ) V 500 –45°C OUT2 800 0V 400 1V ENALL 0V 300 50μs/DIV 3672b1 G18 700 PMOS ON-RESIST 200 FRONT PAGE APPLICATION VIN = 2.9V VIN = 3.6V V 100 10mA RESISTIVE LOAD ON EACH OUTPUT PMOS SWITCH MAX PEAK CURRENT (mA) IN = 3.6V V 600 IN = 5.5V 0 –50 –30 –10 10 30 50 70 90 110 130 2.5 3.0 3.5 4.0 4.5 5.0 5.5 TEMPERATURE (°C) VIN (V) 3672b1 G16 3672b1 G17 3672B1f 5
