Datasheet LTC3422 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | 1.5A, 3MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| Seiten / Seite | 16 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25. C, unless otherwise … |
| Dateiformat / Größe | PDF / 271 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25. C, unless otherwise specified). Single Cell to 3.3V Efficiency
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LTC3422
W U TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25
°
C, unless otherwise specified) Single Cell to 3.3V Efficiency 2-Cell to 3.3V Efficiency Li-Ion to 5V Efficiency
100 100 100 90 90 90 80 80 80 70 70 BURST 70 BURST EFFICIENCY EFFICIENCY 60 PWM 60 VIN = 3V 60 V BURST EFFICIENCY IN = 4.2V V 50 50 IN = 2.4V V EFFICIENCY VIN = 1.6V 50 IN = 3.6V V V IN = 1.8V VIN = 3.1V 40 VIN = 1.6V IN = 1.25V 40 PWM 40 V EFFICIENCY (%) VIN = 1.25V IN = 0.9V EFFICIENCY (%) EFFICIENCY EFFICIENCY (%) PWM 30 V 30 IN = 0.9V V 30 IN = 3V EFFICIENCY 20 20 VIN = 2.4V 20 VIN = 4.2V VIN = 1.8V VIN = 3.6V 10 10 10 VIN = 3.1V f f OSC = 1MHz OSC = 1MHz fOSC = 1MHz 0 0 0 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3422 G01 3422 G02 3422 G03
Burst Mode Operation Load Transient Response Inrush Current Control
V V OUT OUT V 50mV/DIV 100mV/DIV OUT 1V/DIV AC COUPLED AC COUPLED SW 300mA 2V/DIV IOUT INDUCTOR 100mA/DIV CURRENT INDUCTOR 100mA/DIV CURRENT 50mA 0.5A/DIV V V 200µs/DIV 3422 G05 IN = 2.4V 2µs/DIV 3422 G04 IN = 2.4V VIN = 0V TO 2.4V 500µs/DIV 3422 G06 I V LOAD = 20mA OUT = 3.3V VOUT = 3.3V COUT = 22µF COUT = 22µF 100mA LOAD CURRENT
Efficiency vs Frequency Efficiency vs VIN Start-Up Voltage vs Output Current
100 100 1.25 90 fOSC = 300kHz 1.20 90 80 fOSC = 3MHz 1.15 70 80 60 fOSC = 1MHz 1.10 50 70 1.05 40 EFFICIENCY (%) EFFICIENCY (%) 1.00 60 30 START VOLTAGE (V) 0.95 20 50 fOSC = 1MHz 10 V V IN = 2.4V OUT = 3.3V 0.90 V PWM AT 200mA LOAD OUT = 3.3V 0 40 0.85 1 10 100 1000 1 1.5 2 2.5 3 3.5 4 4.5 5 0 50 100 150 200 OUTPUT CURRENT (mA) INPUT VOLTAGE (V) OUTPUT CURRENT (mA) 3422 G07 3422 G08 3422 G09 3422fa 4
W U TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25
°
C, unless otherwise specified) Single Cell to 3.3V Efficiency 2-Cell to 3.3V Efficiency Li-Ion to 5V Efficiency
100 100 100 90 90 90 80 80 80 70 70 BURST 70 BURST EFFICIENCY EFFICIENCY 60 PWM 60 VIN = 3V 60 V BURST EFFICIENCY IN = 4.2V V 50 50 IN = 2.4V V EFFICIENCY VIN = 1.6V 50 IN = 3.6V V V IN = 1.8V VIN = 3.1V 40 VIN = 1.6V IN = 1.25V 40 PWM 40 V EFFICIENCY (%) VIN = 1.25V IN = 0.9V EFFICIENCY (%) EFFICIENCY EFFICIENCY (%) PWM 30 V 30 IN = 0.9V V 30 IN = 3V EFFICIENCY 20 20 VIN = 2.4V 20 VIN = 4.2V VIN = 1.8V VIN = 3.6V 10 10 10 VIN = 3.1V f f OSC = 1MHz OSC = 1MHz fOSC = 1MHz 0 0 0 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3422 G01 3422 G02 3422 G03
Burst Mode Operation Load Transient Response Inrush Current Control
V V OUT OUT V 50mV/DIV 100mV/DIV OUT 1V/DIV AC COUPLED AC COUPLED SW 300mA 2V/DIV IOUT INDUCTOR 100mA/DIV CURRENT INDUCTOR 100mA/DIV CURRENT 50mA 0.5A/DIV V V 200µs/DIV 3422 G05 IN = 2.4V 2µs/DIV 3422 G04 IN = 2.4V VIN = 0V TO 2.4V 500µs/DIV 3422 G06 I V LOAD = 20mA OUT = 3.3V VOUT = 3.3V COUT = 22µF COUT = 22µF 100mA LOAD CURRENT
Efficiency vs Frequency Efficiency vs VIN Start-Up Voltage vs Output Current
100 100 1.25 90 fOSC = 300kHz 1.20 90 80 fOSC = 3MHz 1.15 70 80 60 fOSC = 1MHz 1.10 50 70 1.05 40 EFFICIENCY (%) EFFICIENCY (%) 1.00 60 30 START VOLTAGE (V) 0.95 20 50 fOSC = 1MHz 10 V V IN = 2.4V OUT = 3.3V 0.90 V PWM AT 200mA LOAD OUT = 3.3V 0 40 0.85 1 10 100 1000 1 1.5 2 2.5 3 3.5 4 4.5 5 0 50 100 150 200 OUTPUT CURRENT (mA) INPUT VOLTAGE (V) OUTPUT CURRENT (mA) 3422 G07 3422 G08 3422 G09 3422fa 4