Datasheet LTC3537 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | 2.2 MHz, 600mA Synchronous Step-Up DC/DC Converter and 100mA LDO |
| Seiten / Seite | 22 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| Dateiformat / Größe | PDF / 322 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Burst Mode Threshold Current
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LTC3537
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Burst Mode Threshold Current Burst Mode Threshold Current Oscillator Frequency Change vs VINB vs VINB vs VOUTB
60 180 1 VOUTB = 3.3V VOUTB = 5V NORMALIZED TO 3.3V COUTB = 10μF 160 COUTB = 10μF 0 50 L = 2.2μH L = 2.2μH 140 –1 40 120 LEAVE BURST 100 –2 30 80 ENTER BURST –3 LEAVE BURST 20 60 LOAD CURRENT (mA) LOAD CURRENT (mA) –4 FREQUENCY CHANGE (%) 40 10 ENTER BURST –5 20 0 0 –6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 1.5 2 2.5 3 3.5 4 4.5 5 VINB (V) VINB (V) VOUTB (V) 3537 G12 3537 G10 3537 G11
Oscillator Frequency Change vs RDS(ON) vs VOUTB Temperature RDS(ON) Change vs Temperature
1.0 1 30 NORMALIZED TO 25°C NORMALIZED TO 25°C 0.9 20 0 0.8 10 ) 0.7 –1 (Ω PMOS 0.6 0 ) CHANGE (%) DS(ON) R –2 0.5 PMOS DS(ON –10 NMOS R 0.4 FREQUENCY CHANGE (%) –3 –20 0.3 NMOS 0.2 –4 –30 1.5 2 2.5 3 3.5 4 4.5 5 –40 –20 0 20 40 60 80 –40 –20 0 20 40 60 80 VOUTB (V) TEMPERATURE (°C) TEMPERATURE (°C) 3537 G13 3537 G14 3537 G15
Feedback Voltage Change Burst Mode Quiescent Current vs Temperature Start-Up Voltage vs Temperature vs VOUTB
0.05 0.80 60 NORMALIZED TO 20°C 0.00 0.75 50 VFBB AND VFBL –0.10 0.70 40 (V) (μA) –0.15 0.65 Q(I INBV 30 TAGE CHANGE (%) OUTB –0.20 0.60 V VOL 20 –0.25 0.55 VINB = 1.2V ENLDO = HIGH –0.30 0.50 10 –40 –20 0 20 40 60 80 –40 –20 0 20 40 60 80 1.8 2.3 2.8 3.3 3.8 4.3 4.8 TEMPERATURE (°C) TEMPERATURE (°C) VOUTB (V) 3537 G16 3537 G17 3537 G18 3537fd 6
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Burst Mode Threshold Current Burst Mode Threshold Current Oscillator Frequency Change vs VINB vs VINB vs VOUTB
60 180 1 VOUTB = 3.3V VOUTB = 5V NORMALIZED TO 3.3V COUTB = 10μF 160 COUTB = 10μF 0 50 L = 2.2μH L = 2.2μH 140 –1 40 120 LEAVE BURST 100 –2 30 80 ENTER BURST –3 LEAVE BURST 20 60 LOAD CURRENT (mA) LOAD CURRENT (mA) –4 FREQUENCY CHANGE (%) 40 10 ENTER BURST –5 20 0 0 –6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 1.5 2 2.5 3 3.5 4 4.5 5 VINB (V) VINB (V) VOUTB (V) 3537 G12 3537 G10 3537 G11
Oscillator Frequency Change vs RDS(ON) vs VOUTB Temperature RDS(ON) Change vs Temperature
1.0 1 30 NORMALIZED TO 25°C NORMALIZED TO 25°C 0.9 20 0 0.8 10 ) 0.7 –1 (Ω PMOS 0.6 0 ) CHANGE (%) DS(ON) R –2 0.5 PMOS DS(ON –10 NMOS R 0.4 FREQUENCY CHANGE (%) –3 –20 0.3 NMOS 0.2 –4 –30 1.5 2 2.5 3 3.5 4 4.5 5 –40 –20 0 20 40 60 80 –40 –20 0 20 40 60 80 VOUTB (V) TEMPERATURE (°C) TEMPERATURE (°C) 3537 G13 3537 G14 3537 G15
Feedback Voltage Change Burst Mode Quiescent Current vs Temperature Start-Up Voltage vs Temperature vs VOUTB
0.05 0.80 60 NORMALIZED TO 20°C 0.00 0.75 50 VFBB AND VFBL –0.10 0.70 40 (V) (μA) –0.15 0.65 Q(I INBV 30 TAGE CHANGE (%) OUTB –0.20 0.60 V VOL 20 –0.25 0.55 VINB = 1.2V ENLDO = HIGH –0.30 0.50 10 –40 –20 0 20 40 60 80 –40 –20 0 20 40 60 80 1.8 2.3 2.8 3.3 3.8 4.3 4.8 TEMPERATURE (°C) TEMPERATURE (°C) VOUTB (V) 3537 G16 3537 G17 3537 G18 3537fd 6