Datasheet LTC1622 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | Low Input Voltage Current Mode Step-Down DC/DC Controller |
| Seiten / Seite | 16 / 2 — ABSOLUTE MAXIMUM RATINGS (Note 1). PACKAGE/ORDER INFORMATION. ELECTRICAL … |
| Dateiformat / Größe | PDF / 198 Kb |
| Dokumentensprache | Englisch |
ABSOLUTE MAXIMUM RATINGS (Note 1). PACKAGE/ORDER INFORMATION. ELECTRICAL CHARACTERISTICS The
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LTC1622
W W W U ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN)...– 0.3V to 10V Operating Temperature Range RUN/SS Voltage ... – 0.3V to 2.4V Commercial .. 0°C to 70°C SYNC/MODE Voltage ... – 0.3V to VIN Industrial ... – 45°C to 85°C SENSE – Voltage .. 2.4V to VIN Junction Temperature (Note 2) ... 125°C PDRV Peak Output Current (< 10µs) ... 1A Lead Temperature (Soldering, 10 sec).. 300°C Storage Ambient Temperature Range ... – 65°C to 150°C
U W U PACKAGE/ORDER INFORMATION
ORDER PART ORDER PART NUMBER TOP VIEW NUMBER TOP VIEW SENSE– 1 8 VIN SENSE– 1 8 V LTC1622CMS8 LTC1622CS8 IN I 2 I 2 7 TH PDRV TH 7 PDRV LTC1622IS8 V 3 FB 6 GND V 3 6 FB GND RUN/SS 4 5 SYNC/MODE RUN/SS 4 5 SYNC/MODE MS8 PACKAGE MS8 PART MARKING S8 PART MARKING 8-LEAD PLASTIC MSOP S8 PACKAGE TJMAX = 125°C, θJA = 250°C/ W LTDB 8-LEAD PLASTIC SO 1622 TJMAX = 125°C, θJA = 150°C/ W 1622I Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 4.2V SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current (Note 3) VFB = 0.8V 10 70 nA VFB Regulated Feedback Voltage (Note 3) Commercial Grade ● 0.785 0.8 0.815 V (Note 3) Industrial Grade ● 0.780 0.8 0.820 V VOVL Output Overvoltage Lockout Referenced to Nominal VOUT 4 16 25 % ∆VOSENSE Reference Voltage Line Regulation VIN = 4.2V to 8.5V (Note 3) 0.04 0.08 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop; VITH = 0.2V to 0.625V 0.3 0.5 % Measured in Servo Loop; VITH = 0.9V to 0.625V – 0.3 – 0.5 % IS Input DC Supply Current (Note 4) Burst Mode Inhibited VIN = 2.3V 450 µA Sleep Mode VITH = 0V, VSYNC/MODE = 2.4V 350 400 µA Shutdown VRUN/SS = 0V 15 30 µA Shutdown VRUN/SS = 0V, VIN = VUVLO – 0.1V 4 10 µA VRUN/SS RUN/SS Threshold Commercial Grade ● 0.4 0.7 0.9 V Industrial Grade ● 0.3 0.7 1.0 V IRUN/SS Soft-Start Current Source VRUN/SS = 0V 1 2.5 5 µA fOSC Oscillator Frequency VFB = 0.8V 475 550 625 kHz VFB = 0V 75 110 140 kHz VSYNC/MODE SYNC/MODE Threshold VSYNC/MODE Ramping Down 1 1.5 V VUVLO Undervoltage Lockout VIN Ramping Down ● 1.55 1.92 2.3 V VIN Ramping Up 1.97 2.36 V 2
W W W U ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN)...– 0.3V to 10V Operating Temperature Range RUN/SS Voltage ... – 0.3V to 2.4V Commercial .. 0°C to 70°C SYNC/MODE Voltage ... – 0.3V to VIN Industrial ... – 45°C to 85°C SENSE – Voltage .. 2.4V to VIN Junction Temperature (Note 2) ... 125°C PDRV Peak Output Current (< 10µs) ... 1A Lead Temperature (Soldering, 10 sec).. 300°C Storage Ambient Temperature Range ... – 65°C to 150°C
U W U PACKAGE/ORDER INFORMATION
ORDER PART ORDER PART NUMBER TOP VIEW NUMBER TOP VIEW SENSE– 1 8 VIN SENSE– 1 8 V LTC1622CMS8 LTC1622CS8 IN I 2 I 2 7 TH PDRV TH 7 PDRV LTC1622IS8 V 3 FB 6 GND V 3 6 FB GND RUN/SS 4 5 SYNC/MODE RUN/SS 4 5 SYNC/MODE MS8 PACKAGE MS8 PART MARKING S8 PART MARKING 8-LEAD PLASTIC MSOP S8 PACKAGE TJMAX = 125°C, θJA = 250°C/ W LTDB 8-LEAD PLASTIC SO 1622 TJMAX = 125°C, θJA = 150°C/ W 1622I Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 4.2V SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current (Note 3) VFB = 0.8V 10 70 nA VFB Regulated Feedback Voltage (Note 3) Commercial Grade ● 0.785 0.8 0.815 V (Note 3) Industrial Grade ● 0.780 0.8 0.820 V VOVL Output Overvoltage Lockout Referenced to Nominal VOUT 4 16 25 % ∆VOSENSE Reference Voltage Line Regulation VIN = 4.2V to 8.5V (Note 3) 0.04 0.08 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop; VITH = 0.2V to 0.625V 0.3 0.5 % Measured in Servo Loop; VITH = 0.9V to 0.625V – 0.3 – 0.5 % IS Input DC Supply Current (Note 4) Burst Mode Inhibited VIN = 2.3V 450 µA Sleep Mode VITH = 0V, VSYNC/MODE = 2.4V 350 400 µA Shutdown VRUN/SS = 0V 15 30 µA Shutdown VRUN/SS = 0V, VIN = VUVLO – 0.1V 4 10 µA VRUN/SS RUN/SS Threshold Commercial Grade ● 0.4 0.7 0.9 V Industrial Grade ● 0.3 0.7 1.0 V IRUN/SS Soft-Start Current Source VRUN/SS = 0V 1 2.5 5 µA fOSC Oscillator Frequency VFB = 0.8V 475 550 625 kHz VFB = 0V 75 110 140 kHz VSYNC/MODE SYNC/MODE Threshold VSYNC/MODE Ramping Down 1 1.5 V VUVLO Undervoltage Lockout VIN Ramping Down ● 1.55 1.92 2.3 V VIN Ramping Up 1.97 2.36 V 2