Datasheet LTC3700 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | Constant Frequency Step-Down DC/DC Controller with LDO Regulator |
| Seiten / Seite | 16 / 2 — ABSOLUTE MAXIMUM RATINGS. PACKAGE/ORDER INFORMATION. (Note 1). ELECTRICAL … |
| Dateiformat / Größe | PDF / 221 Kb |
| Dokumentensprache | Englisch |
ABSOLUTE MAXIMUM RATINGS. PACKAGE/ORDER INFORMATION. (Note 1). ELECTRICAL CHARACTERISTICS The
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LTC3700
W W W U U W U ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1)
Buck Input Supply Voltage (VIN) ..– 0.3V to 10V ORDER PART SENSE –, PGATE Voltages ... – 0.3V to (VIN + 0.3V) NUMBER VFB, ITH/RUN Voltages ..–0.3V to 2.4V TOP VIEW LTC3700EMS PGATE Peak Output Current (< 10µs) ... 1A V 1 IN2 10 ITH/RUN LDO 2 9 VFB LDO Input Supply Voltage (VIN2) ...– 0.3V to 6V V 3 FB2 8 SENSE– PGOOD 4 7 V LDO, V IN FB2 Voltages ... – 0.3V to (VIN2 + 0.3V) GND 5 6 PGATE PGOOD Voltage ...– 0.3V to 10V MS PACKAGE MS PART MARKING LDO Peak Output Current (< 10µs) ... 500mA 10-LEAD PLASTIC MSOP T Storage Ambient Temperature Range ... – 65°C to 150°C JMAX = 150°C, θJA = 230°C/ W LTXN Operating Temperature Range (Note 2) ... –40°C to 85°C Junction Temperature (Note 3) ... 150°C Lead Temperature (Soldering, 10 sec).. 300°C Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = VIN2 = 4.2V unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Buck DC/DC Controller
Input DC Supply Current Typicals at VIN = 4.2V (Note 4) Normal Operation 2.65V ≤ VIN ≤ 9.8V 210 340 µA Sleep Mode 2.65V ≤ VIN ≤ 9.8V 200 330 µA Shutdown 2.65V ≤ VIN ≤ 9.8V, VITH /RUN = 0V 10 30 µA UVLO VIN < UVLO Threshold 10 30 µA Undervoltage Lockout Threshold VIN Falling ● 1.90 2.10 2.60 V VIN Rising ● 2.00 2.20 2.65 V Shutdown Threshold (at ITH /RUN) ● 0.15 0.30 0.45 V Start-Up Current Source VITH /RUN = 0V 0.25 0.5 0.85 µA Regulated Feedback Voltage (Note 5), 0°C to 70°C ● 0.780 0.800 0.820 V (Note 5), –40°C to 85°C ● 0.770 0.800 0.830 V Output Voltage Line Regulation 2.65V ≤ VIN ≤ 9.8V (Note 5) 0.1 mV/V Output Voltage Load Regulation ITH /RUN Sinking 5µA (Note 5) 4 mV/µA ITH /RUN Sourcing 5µA (Note 5) 4 mV/µA VFB Input Current (Note 5) 10 50 nA Overvoltage Protect Threshold Measured at VFB 0.820 0.860 0.910 V Overvoltage Protect Hysteresis 20 mV Oscillator Frequency VFB = 0.8V 500 550 650 kHz VFB = 0V 110 kHz Gate Drive Rise Time CLOAD = 3000pF 40 ns Gate Drive Fall Time CLOAD = 3000pF 40 ns Peak Current Sense Voltage (Note 6) 120 mV Peak Current Sense Voltage in Burst Mode 30 mV 3700f 2
W W W U U W U ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1)
Buck Input Supply Voltage (VIN) ..– 0.3V to 10V ORDER PART SENSE –, PGATE Voltages ... – 0.3V to (VIN + 0.3V) NUMBER VFB, ITH/RUN Voltages ..–0.3V to 2.4V TOP VIEW LTC3700EMS PGATE Peak Output Current (< 10µs) ... 1A V 1 IN2 10 ITH/RUN LDO 2 9 VFB LDO Input Supply Voltage (VIN2) ...– 0.3V to 6V V 3 FB2 8 SENSE– PGOOD 4 7 V LDO, V IN FB2 Voltages ... – 0.3V to (VIN2 + 0.3V) GND 5 6 PGATE PGOOD Voltage ...– 0.3V to 10V MS PACKAGE MS PART MARKING LDO Peak Output Current (< 10µs) ... 500mA 10-LEAD PLASTIC MSOP T Storage Ambient Temperature Range ... – 65°C to 150°C JMAX = 150°C, θJA = 230°C/ W LTXN Operating Temperature Range (Note 2) ... –40°C to 85°C Junction Temperature (Note 3) ... 150°C Lead Temperature (Soldering, 10 sec).. 300°C Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = VIN2 = 4.2V unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Buck DC/DC Controller
Input DC Supply Current Typicals at VIN = 4.2V (Note 4) Normal Operation 2.65V ≤ VIN ≤ 9.8V 210 340 µA Sleep Mode 2.65V ≤ VIN ≤ 9.8V 200 330 µA Shutdown 2.65V ≤ VIN ≤ 9.8V, VITH /RUN = 0V 10 30 µA UVLO VIN < UVLO Threshold 10 30 µA Undervoltage Lockout Threshold VIN Falling ● 1.90 2.10 2.60 V VIN Rising ● 2.00 2.20 2.65 V Shutdown Threshold (at ITH /RUN) ● 0.15 0.30 0.45 V Start-Up Current Source VITH /RUN = 0V 0.25 0.5 0.85 µA Regulated Feedback Voltage (Note 5), 0°C to 70°C ● 0.780 0.800 0.820 V (Note 5), –40°C to 85°C ● 0.770 0.800 0.830 V Output Voltage Line Regulation 2.65V ≤ VIN ≤ 9.8V (Note 5) 0.1 mV/V Output Voltage Load Regulation ITH /RUN Sinking 5µA (Note 5) 4 mV/µA ITH /RUN Sourcing 5µA (Note 5) 4 mV/µA VFB Input Current (Note 5) 10 50 nA Overvoltage Protect Threshold Measured at VFB 0.820 0.860 0.910 V Overvoltage Protect Hysteresis 20 mV Oscillator Frequency VFB = 0.8V 500 550 650 kHz VFB = 0V 110 kHz Gate Drive Rise Time CLOAD = 3000pF 40 ns Gate Drive Fall Time CLOAD = 3000pF 40 ns Peak Current Sense Voltage (Note 6) 120 mV Peak Current Sense Voltage in Burst Mode 30 mV 3700f 2