Datasheet LT3481 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 36V, 2A, 2.8MHz Step-Down Switching Regulator with 50µA Quiescent Current |
| Pages / Page | 24 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Error Amp Output Current. Minimum … |
| File Format / Size | PDF / 315 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Error Amp Output Current. Minimum Input Voltage. Switching Waveforms;. VC Voltages
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Text Version of Document
LT3481
TYPICAL PERFORMANCE CHARACTERISTICS Error Amp Output Current Minimum Input Voltage Minimum Input Voltage
100 4.5 6.5 80 4.0 6.0 60 40 3.5 5.5 20 TAGE (V) TAGE (V) 0 3.0 5.0 PIN CURRENT (μA) –20 C INPUT VOL INPUT VOL V V V –40 OUT = 3.3V OUT = 5.0V 2.5 TA = 25°C 4.5 TA = 25°C –60 L = 4.7μH L = 4.7μH f = 800kHz f = 800kHz –80 2.0 4.0 1.065 1.165 1?.265 1.365 1.465 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 FB PIN VOLTAGE (V) LOAD CURRENT (A) LOAD CURRENT (A) 3481 G19 3481 G20 3481 G21
Switching Waveforms; VC Voltages Power Good Threshold Burst Mode Operation
2.50 1.200 VIN = 12V; FRONT PAGE APPLICATION ILOAD = 10mA 2.00 IL 1.180 0.5A/DIV CURRENT LIMIT CLAMP TAGE (V) 1.50 TAGE (V) 1.160 VSW 1.00 5V/DIV 1.140 SWITCHING THRESHOLD THRESHOLD VOL THRESHOLD VOL 0.50 VOUT 1.120 10mV/DIV PG RISING 0 1.100 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 5μs/DIV 3481 G24 TEMPERATURE (°C) TEMPERATURE (°C) 3481 G22 3481 G23
Switching Waveforms; Transition from Burst Mode Operation to Switching Waveforms; Full Full Frequency Frequency Continuous Operation
IL I 0.5A/DIV L 0.5A/DIV V V RUN/SS RUN/SS 5V/DIV 5V/DIV VOUT VOUT 10mV/DIV 10mV/DIV VIN = 12V; FRONT PAGE APPLICATION VIN = 12V; FRONT PAGE APPLICATION ILOAD = 140mA ILOAD = 1A 3481 G25 1μs/DIV 3481 G26 1μs/DIV 3481fc 6
TYPICAL PERFORMANCE CHARACTERISTICS Error Amp Output Current Minimum Input Voltage Minimum Input Voltage
100 4.5 6.5 80 4.0 6.0 60 40 3.5 5.5 20 TAGE (V) TAGE (V) 0 3.0 5.0 PIN CURRENT (μA) –20 C INPUT VOL INPUT VOL V V V –40 OUT = 3.3V OUT = 5.0V 2.5 TA = 25°C 4.5 TA = 25°C –60 L = 4.7μH L = 4.7μH f = 800kHz f = 800kHz –80 2.0 4.0 1.065 1.165 1?.265 1.365 1.465 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 FB PIN VOLTAGE (V) LOAD CURRENT (A) LOAD CURRENT (A) 3481 G19 3481 G20 3481 G21
Switching Waveforms; VC Voltages Power Good Threshold Burst Mode Operation
2.50 1.200 VIN = 12V; FRONT PAGE APPLICATION ILOAD = 10mA 2.00 IL 1.180 0.5A/DIV CURRENT LIMIT CLAMP TAGE (V) 1.50 TAGE (V) 1.160 VSW 1.00 5V/DIV 1.140 SWITCHING THRESHOLD THRESHOLD VOL THRESHOLD VOL 0.50 VOUT 1.120 10mV/DIV PG RISING 0 1.100 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 5μs/DIV 3481 G24 TEMPERATURE (°C) TEMPERATURE (°C) 3481 G22 3481 G23
Switching Waveforms; Transition from Burst Mode Operation to Switching Waveforms; Full Full Frequency Frequency Continuous Operation
IL I 0.5A/DIV L 0.5A/DIV V V RUN/SS RUN/SS 5V/DIV 5V/DIV VOUT VOUT 10mV/DIV 10mV/DIV VIN = 12V; FRONT PAGE APPLICATION VIN = 12V; FRONT PAGE APPLICATION ILOAD = 140mA ILOAD = 1A 3481 G25 1μs/DIV 3481 G26 1μs/DIV 3481fc 6
