Datasheet LTC3700 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | Constant Frequency Step-Down DC/DC Controller with LDO Regulator |
| Seiten / Seite | 16 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. BUCK DC/DC CONTROLLER. Normalized … |
| Dateiformat / Größe | PDF / 221 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFOR A CE CHARACTERISTICS. BUCK DC/DC CONTROLLER. Normalized Oscillator Frequency. VFB Voltage vs Temperature
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LTC3700
W U TYPICAL PERFOR A CE CHARACTERISTICS BUCK DC/DC CONTROLLER Normalized Oscillator Frequency VFB Voltage vs Temperature vs Temperature
805 10 V 804 IN = 4.2V V 8 IN = 4.2V ITH/RUN = VFB 803 NO LOAD 6 802 4 801 2 800 0 VOLTAGE (mV) 799 –2 FBV 798 –4 797 –6 796 NORMALIZED FREQUENCY SHIFT (%) –8 795 –10 –55 –35 –15 5 25 45 65 85 105 125 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) TEMPERATURE (°C) 3700 G01 3700 G02
Shutdown Threshold vs Undervoltage Lockout Trip Temperature Voltage vs Temperature
400 2.30 V 380 IN = 4.2V 2.28 360 2.26 340 2.24 VIN RISING 320 2.20 300 2.00 280 2.18 /RUN VOLTAGE (mV) TRIP VOLTAGE (V) 260 2.16 I TH 240 2.14 VIN FALLING 220 2.12 200 2.10 –55 –35 –15 5 25 45 65 85 105 125 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) TEMPERATURE (°C) 3700 G04 3700 G03
Buck Supply Current Maximum (VIN – SENSE–) Voltage vs Input Voltage vs Duty Cycle
250 130 ITH/RUN = VFB V 240 IN = 4.2V VIN2 = 0V 120 TA = 25°C T 230 A = 25°C µA) 110 220 100 210 200 90 190 80 SUPPLY CURRENT ( 180 TRIP VOLTAGE (mV) IN 70 V 170 60 160 150 50 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 V DUTY CYCLE (%) IN INPUT VOLTAGE (V) 3700 G10 3700 G05 3700f 4
W U TYPICAL PERFOR A CE CHARACTERISTICS BUCK DC/DC CONTROLLER Normalized Oscillator Frequency VFB Voltage vs Temperature vs Temperature
805 10 V 804 IN = 4.2V V 8 IN = 4.2V ITH/RUN = VFB 803 NO LOAD 6 802 4 801 2 800 0 VOLTAGE (mV) 799 –2 FBV 798 –4 797 –6 796 NORMALIZED FREQUENCY SHIFT (%) –8 795 –10 –55 –35 –15 5 25 45 65 85 105 125 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) TEMPERATURE (°C) 3700 G01 3700 G02
Shutdown Threshold vs Undervoltage Lockout Trip Temperature Voltage vs Temperature
400 2.30 V 380 IN = 4.2V 2.28 360 2.26 340 2.24 VIN RISING 320 2.20 300 2.00 280 2.18 /RUN VOLTAGE (mV) TRIP VOLTAGE (V) 260 2.16 I TH 240 2.14 VIN FALLING 220 2.12 200 2.10 –55 –35 –15 5 25 45 65 85 105 125 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE (°C) TEMPERATURE (°C) 3700 G04 3700 G03
Buck Supply Current Maximum (VIN – SENSE–) Voltage vs Input Voltage vs Duty Cycle
250 130 ITH/RUN = VFB V 240 IN = 4.2V VIN2 = 0V 120 TA = 25°C T 230 A = 25°C µA) 110 220 100 210 200 90 190 80 SUPPLY CURRENT ( 180 TRIP VOLTAGE (mV) IN 70 V 170 60 160 150 50 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 V DUTY CYCLE (%) IN INPUT VOLTAGE (V) 3700 G10 3700 G05 3700f 4