Datasheet LTC3728L-1 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | Dual, 550kHz, 2-Phase Synchronous Regulator |
| Pages / Page | 32 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. Input Source/Capacitor. Constant … |
| File Format / Size | PDF / 487 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Input Source/Capacitor. Constant Frequency (Burst Inhibit)
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LTC3728L-1
TYPICAL PERFORMANCE CHARACTERISTICS Input Source/Capacitor Constant Frequency (Burst Inhibit) Instantaneous Current (Figure 13) Burst Mode Operation (Figure 13) Operation (Figure 13)
IIN 2A/DIV VOUT VOUT 20mV/DIV V 20mV/DIV IN 200mV/DIV VSW1 10V/DIV VSW2 IL IL 10V/DIV 0.5A/DIV 0.5A/DIV 3728L1 G22 3728L1 G24 V 1μs/DIV 3728L1 G23 IN = 15V V 10μs/DIV IN = 15V V 2μs/DIV IN = 15V VOUT1 = 5V, VOUT2 = 3.3V VOUT = 5V VOUT = 5V VPLLFLTR = 0V VPLLFLTR = 0V VPLLFLTR = 0V IOUT5 = IOUT3.3 = 2A VFCB = 5V VFCB = 5V IOUT = 20mA IOUT = 20mA
Current Sense Pin Input Current EXTVCC Switch Resistance vs Temperature vs Temperature
35 10 VOUT = 5V 33 8 31 6 29 4 SWITCH RESISTANCE (Ω) CC 27 2 EXTV CURRENT SENSE INPUT CURRENT (μA) 25 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3728L1 G26 3728L1 G27
Oscillator Frequency Undervoltage Lockout vs Temperature vs Temperature
700 3.50 600 VPLLFLTR = 2.4V 3.45 500 3.40 VPLLFLTR = 1.2V 400 3.35 300 VPLLFLTR = 0V FREQUENCY (kHz) 3.30 200 UNDERVOLTAGE LOCKOUT (V) 100 3.25 0 3.20 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3728L1 G28 3728L1 G29 3728l1fc 7
TYPICAL PERFORMANCE CHARACTERISTICS Input Source/Capacitor Constant Frequency (Burst Inhibit) Instantaneous Current (Figure 13) Burst Mode Operation (Figure 13) Operation (Figure 13)
IIN 2A/DIV VOUT VOUT 20mV/DIV V 20mV/DIV IN 200mV/DIV VSW1 10V/DIV VSW2 IL IL 10V/DIV 0.5A/DIV 0.5A/DIV 3728L1 G22 3728L1 G24 V 1μs/DIV 3728L1 G23 IN = 15V V 10μs/DIV IN = 15V V 2μs/DIV IN = 15V VOUT1 = 5V, VOUT2 = 3.3V VOUT = 5V VOUT = 5V VPLLFLTR = 0V VPLLFLTR = 0V VPLLFLTR = 0V IOUT5 = IOUT3.3 = 2A VFCB = 5V VFCB = 5V IOUT = 20mA IOUT = 20mA
Current Sense Pin Input Current EXTVCC Switch Resistance vs Temperature vs Temperature
35 10 VOUT = 5V 33 8 31 6 29 4 SWITCH RESISTANCE (Ω) CC 27 2 EXTV CURRENT SENSE INPUT CURRENT (μA) 25 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3728L1 G26 3728L1 G27
Oscillator Frequency Undervoltage Lockout vs Temperature vs Temperature
700 3.50 600 VPLLFLTR = 2.4V 3.45 500 3.40 VPLLFLTR = 1.2V 400 3.35 300 VPLLFLTR = 0V FREQUENCY (kHz) 3.30 200 UNDERVOLTAGE LOCKOUT (V) 100 3.25 0 3.20 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3728L1 G28 3728L1 G29 3728l1fc 7
