Datasheet LTC3535 (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | Dual Channel 550mA 1MHz Synchronous Step-Up DC/DC Converter |
| Páginas / Página | 16 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS (Each Channel) TA = 25°C, unless … |
| Formato / tamaño de archivo | PDF / 1.2 Mb |
| Idioma del documento | Inglés |
TYPICAL PERFORMANCE CHARACTERISTICS (Each Channel) TA = 25°C, unless otherwise noted. Oscillator Frequency Change
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LTC3535
TYPICAL PERFORMANCE CHARACTERISTICS (Each Channel) TA = 25°C, unless otherwise noted. Oscillator Frequency Change RDS(ON) vs VOUT vs Temperature RDS(ON) Change vs Temperature
0.90 10 1.3 NORMALIZED TO 25°C NORMALIZED TO 25°C 0.85 8 0.80 1.2 6 0.75 0.70 4 1.1 DS(ON) 2 (Ω) 0.65 PMOS 0.60 0 1.0 R DS(ON) 0.55 –2 0.50 0.9 –4 NORMALIZED R 0.45 FREQUECNY CHANGE (%) NMOS 0.40 –6 0.8 0.35 –8 0.30 –10 0.7 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 70 90 VOUT (V) TEMPERATURE (°C) TEMPERATURE (°C) 3535 G10 3535 G11 3535 G12
Burst Mode Quiescent Current VFB vs Temperature Start-Up Voltage vs Temperature vs VOUT
0.50 0.80 10.0 NORMALIZED TO 25°C MEASURED ON VOUT 0.25 0.75 9.5 1mA LOAD 0 0.70 (%) 9.0 FB (V) –0.25 0.65 (µA) 8.5 V IN NO LOAD I Q –0.50 0.60 CHANGE IN V 8.0 –0.75 0.55 7.5 –1.00 0.50 7.0 –60 –40 –20 0 20 40 60 80 100 –50 25 0 25 50 75 100 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TEMPERATURE (°C) TEMPERATURE (°C) VOUT (V) 3535 G13 3526 G14 3535 G15
Fixed Frequency Switching Waveform and VOUT Ripple Burst Mode Waveforms VOUT and IIN During Soft-Start
SW PIN VOUT SW PIN 2V/DIV 1V/DIV 2V/DIV VOUT INPUT V 20mV/DIV OUT CURRENT 10mV/DIV AC-COUPLED 0.2A/DIV AC-COUPLED INDUCTOR CURRENT SHDN PIN 0.2A/DIV 1V/DIV V 3535 G16 3535 G17 3535 G18 IN = 1.2V 500ns/DIV VIN = 1.2V 10µs/DIV VOUT = 3.3V 200µs/DIV VOUT = 3.3V AT 100mA VOUT = 3.3V COUT = 10µF COUT = 10µF COUT = 10µF 3535fa 5 Document Outline Features Description Applcations Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS (Each Channel) TA = 25°C, unless otherwise noted. Oscillator Frequency Change RDS(ON) vs VOUT vs Temperature RDS(ON) Change vs Temperature
0.90 10 1.3 NORMALIZED TO 25°C NORMALIZED TO 25°C 0.85 8 0.80 1.2 6 0.75 0.70 4 1.1 DS(ON) 2 (Ω) 0.65 PMOS 0.60 0 1.0 R DS(ON) 0.55 –2 0.50 0.9 –4 NORMALIZED R 0.45 FREQUECNY CHANGE (%) NMOS 0.40 –6 0.8 0.35 –8 0.30 –10 0.7 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 70 90 VOUT (V) TEMPERATURE (°C) TEMPERATURE (°C) 3535 G10 3535 G11 3535 G12
Burst Mode Quiescent Current VFB vs Temperature Start-Up Voltage vs Temperature vs VOUT
0.50 0.80 10.0 NORMALIZED TO 25°C MEASURED ON VOUT 0.25 0.75 9.5 1mA LOAD 0 0.70 (%) 9.0 FB (V) –0.25 0.65 (µA) 8.5 V IN NO LOAD I Q –0.50 0.60 CHANGE IN V 8.0 –0.75 0.55 7.5 –1.00 0.50 7.0 –60 –40 –20 0 20 40 60 80 100 –50 25 0 25 50 75 100 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TEMPERATURE (°C) TEMPERATURE (°C) VOUT (V) 3535 G13 3526 G14 3535 G15
Fixed Frequency Switching Waveform and VOUT Ripple Burst Mode Waveforms VOUT and IIN During Soft-Start
SW PIN VOUT SW PIN 2V/DIV 1V/DIV 2V/DIV VOUT INPUT V 20mV/DIV OUT CURRENT 10mV/DIV AC-COUPLED 0.2A/DIV AC-COUPLED INDUCTOR CURRENT SHDN PIN 0.2A/DIV 1V/DIV V 3535 G16 3535 G17 3535 G18 IN = 1.2V 500ns/DIV VIN = 1.2V 10µs/DIV VOUT = 3.3V 200µs/DIV VOUT = 3.3V AT 100mA VOUT = 3.3V COUT = 10µF COUT = 10µF COUT = 10µF 3535fa 5 Document Outline Features Description Applcations Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts