Datasheet LTC3522 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | Synchronous 400mA Buck-Boost and 200mA Buck Converters |
| Seiten / Seite | 20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). … |
| Dateiformat / Größe | PDF / 284 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). Buck-Boost Feedback Voltage vs
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LTC3522
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Buck-Boost Feedback Voltage vs Buck Feedback Voltage vs Buck-Boost Maximum Load Temperature Temperature Current, Burst Mode Operation
0.5 0.5 90 L = 4.7μH °C (%) 0.4 °C (%) 0.4 80 VOUT = 3V 0.3 0.3 70 0.2 0.2 60 0.1 0.1 VOUT = 5V 50 0 0 40 –0.1 –0.1 30 –0.2 –0.2 –0.3 –0.3 20 MAXIMUM LOAD CURRENT (mA) –0.4 –0.4 10 CHANGE IN FEEDBACK VOLTAGE FROM 20 –0.5 CHANGE IN FEEDBACK VOLTAGE FROM 20 –0.5 0 –40 –20 0 20 40 60 80 100 120 140 –40 –20 0 20 40 60 80 100 120 140 2.4 2.9 3.4 3.9 4.4 4.9 5.4 TEMPERATURE (°C) TEMPERATURE (°C) VIN (V) 3522 G09 3522 G09 3522 G11
Buck-Boost Maximum Load No Load Quiescent Current Buck-Boost Burst to PWM Current, PWM Mode vs VIN Transition
600 50 L = 4.7μH BOTH CONVERTERS ENABLED 45 INDUCTOR 500 VOUT = 3.3V CURRENT 40 μA) 200mA/DIV 35 400 30 VOUT 300 25 100mV/DIV VOUT = 5V 20 200 50 IN = 3.6V μs/DIV 3522 G14 V LOAD CURRENT (mA) 15 V QUIESCENT CURRENT ( OUT = 3.3V 10 100 L = 4.7μH C 5 OUT = 4.7μF 0 0 2.4 2.9 3.4 3.9 4.4 4.9 5.4 2.4 2.9 3.4 3.9 4.4 4.9 5.4 VIN (V) VIN (V) 3522 G12 3522 G13
Buck-Boost Load Step, Buck Load Step, PWM Mode, Buck Load Step, Burst Mode 0mA to 300mA 5mA to 200mA Operation, 5mA to 200mA
VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 100mA/DIV 100mA/DIV 200mA/DIV 100μs/DIV 3522 G15 VIN = 3.6V 100μs/DIV 3522 G16 VIN = 3.6V 100μs/DIV 3522 G17 VIN = 3.6V VOUT = 3V VOUT = 1.8V VOUT = 1.8V L = 4.7μH L = 4.7μH L = 4.7μH COUT = 4.7μF COUT = 4.7μF COUT = 4.7μF 3522fa 5
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Buck-Boost Feedback Voltage vs Buck Feedback Voltage vs Buck-Boost Maximum Load Temperature Temperature Current, Burst Mode Operation
0.5 0.5 90 L = 4.7μH °C (%) 0.4 °C (%) 0.4 80 VOUT = 3V 0.3 0.3 70 0.2 0.2 60 0.1 0.1 VOUT = 5V 50 0 0 40 –0.1 –0.1 30 –0.2 –0.2 –0.3 –0.3 20 MAXIMUM LOAD CURRENT (mA) –0.4 –0.4 10 CHANGE IN FEEDBACK VOLTAGE FROM 20 –0.5 CHANGE IN FEEDBACK VOLTAGE FROM 20 –0.5 0 –40 –20 0 20 40 60 80 100 120 140 –40 –20 0 20 40 60 80 100 120 140 2.4 2.9 3.4 3.9 4.4 4.9 5.4 TEMPERATURE (°C) TEMPERATURE (°C) VIN (V) 3522 G09 3522 G09 3522 G11
Buck-Boost Maximum Load No Load Quiescent Current Buck-Boost Burst to PWM Current, PWM Mode vs VIN Transition
600 50 L = 4.7μH BOTH CONVERTERS ENABLED 45 INDUCTOR 500 VOUT = 3.3V CURRENT 40 μA) 200mA/DIV 35 400 30 VOUT 300 25 100mV/DIV VOUT = 5V 20 200 50 IN = 3.6V μs/DIV 3522 G14 V LOAD CURRENT (mA) 15 V QUIESCENT CURRENT ( OUT = 3.3V 10 100 L = 4.7μH C 5 OUT = 4.7μF 0 0 2.4 2.9 3.4 3.9 4.4 4.9 5.4 2.4 2.9 3.4 3.9 4.4 4.9 5.4 VIN (V) VIN (V) 3522 G12 3522 G13
Buck-Boost Load Step, Buck Load Step, PWM Mode, Buck Load Step, Burst Mode 0mA to 300mA 5mA to 200mA Operation, 5mA to 200mA
VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 100mA/DIV 100mA/DIV 200mA/DIV 100μs/DIV 3522 G15 VIN = 3.6V 100μs/DIV 3522 G16 VIN = 3.6V 100μs/DIV 3522 G17 VIN = 3.6V VOUT = 3V VOUT = 1.8V VOUT = 1.8V L = 4.7μH L = 4.7μH L = 4.7μH COUT = 4.7μF COUT = 4.7μF COUT = 4.7μF 3522fa 5