Datasheet LTC3772B (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller |
| 页数 / 页 | 20 / 2 — ABSOLUTE MAXIMUM RATINGS (Note 1). PACKAGE/ORDER INFORMATION. Order … |
| 文件格式/大小 | PDF / 331 Kb |
| 文件语言 | 英语 |
ABSOLUTE MAXIMUM RATINGS (Note 1). PACKAGE/ORDER INFORMATION. Order Options. ELECTRICAL CHARACTERISTICS The
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LTC3772B
W W W U ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN).. – 0.3V to 10V Operating Temperature Range (Note 2) .. – 40°C to 85°C IPRG Voltage ... – 0.3V to (VIN + 0.3V) Junction Temperature (Note 3) .. 125°C VFB, ITH/RUN Voltages ... –0.3V to 2.4V Storage Temperature Range ... – 65°C to 125°C SW Voltage ... – 2V to (VIN + 1V) or 10V Maximum Lead Temperature (Soldering, 10 sec) PGATE Peak Output Current (<10µs) .. 1A TSOT-23 ... 300°C
U W U PACKAGE/ORDER INFORMATION
TOP VIEW TOP VIEW GND 1 8 PGATE V 2 7 V I FB IN PRG 1 8 NC 9 I ITH/RUN 3 6 SW TH/RUN 2 7 SW VFB 3 6 VIN IPRG 4 5 NC GND 4 5 PGATE TS8 PACKAGE DDB PACKAGE 8-LEAD PLASTIC TSOT-23 8-LEAD (3mm × 2mm) PLASTIC DFN T T JMAX = 125°C, θJA = 230°C/W JMAX = 125°C, θJA = 76°C/W EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB ORDER PART NUMBER DDB PART MARKING ORDER PART NUMBER TS8 PART MARKING LTC3772BEDDB LBWP LTC3772BETS8 LTBWN
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
indicates specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 4.2V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range ● 2.75 9.8 V Input DC Supply Current (Note 4) No Load VFB = 0.83V 200 325 µA Shutdown VITH/RUN = 0V 8 20 µA UVLO VIN < UVLO Threshold – 100mV 1 5 µA Undervoltage Lockout (UVLO) Threshold VIN Rising ● 2.0 2.75 V VIN Falling ● 1.85 2.60 V Start-Up Current Source VITH/RUN = 0V 0.7 1.2 1.7 µA Shutdown Threshold (at ITH/RUN) VITH/RUN Rising ● 0.3 0.6 0.95 V Regulated Feedback Voltage 0°C ≤ TA ≤ 85°C (Note 5) 0.788 0.800 0.812 V –40°C ≤ TA ≤ 85°C (Note 5) ● 0.780 0.800 0.812 V Feedback Voltage Line Regulation 2.75V ≤ VIN ≤ 9V (Note 5) 0.08 0.2 mV/V Feedback Voltage Load Regulation ITH/RUN = 1.6V (Note 5) 0.5 0.2 % ITH/RUN = 1V (Note 5) –0.5 –0.2 % 3772bfa 2
W W W U ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN).. – 0.3V to 10V Operating Temperature Range (Note 2) .. – 40°C to 85°C IPRG Voltage ... – 0.3V to (VIN + 0.3V) Junction Temperature (Note 3) .. 125°C VFB, ITH/RUN Voltages ... –0.3V to 2.4V Storage Temperature Range ... – 65°C to 125°C SW Voltage ... – 2V to (VIN + 1V) or 10V Maximum Lead Temperature (Soldering, 10 sec) PGATE Peak Output Current (<10µs) .. 1A TSOT-23 ... 300°C
U W U PACKAGE/ORDER INFORMATION
TOP VIEW TOP VIEW GND 1 8 PGATE V 2 7 V I FB IN PRG 1 8 NC 9 I ITH/RUN 3 6 SW TH/RUN 2 7 SW VFB 3 6 VIN IPRG 4 5 NC GND 4 5 PGATE TS8 PACKAGE DDB PACKAGE 8-LEAD PLASTIC TSOT-23 8-LEAD (3mm × 2mm) PLASTIC DFN T T JMAX = 125°C, θJA = 230°C/W JMAX = 125°C, θJA = 76°C/W EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB ORDER PART NUMBER DDB PART MARKING ORDER PART NUMBER TS8 PART MARKING LTC3772BEDDB LBWP LTC3772BETS8 LTBWN
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
indicates specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 4.2V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range ● 2.75 9.8 V Input DC Supply Current (Note 4) No Load VFB = 0.83V 200 325 µA Shutdown VITH/RUN = 0V 8 20 µA UVLO VIN < UVLO Threshold – 100mV 1 5 µA Undervoltage Lockout (UVLO) Threshold VIN Rising ● 2.0 2.75 V VIN Falling ● 1.85 2.60 V Start-Up Current Source VITH/RUN = 0V 0.7 1.2 1.7 µA Shutdown Threshold (at ITH/RUN) VITH/RUN Rising ● 0.3 0.6 0.95 V Regulated Feedback Voltage 0°C ≤ TA ≤ 85°C (Note 5) 0.788 0.800 0.812 V –40°C ≤ TA ≤ 85°C (Note 5) ● 0.780 0.800 0.812 V Feedback Voltage Line Regulation 2.75V ≤ VIN ≤ 9V (Note 5) 0.08 0.2 mV/V Feedback Voltage Load Regulation ITH/RUN = 1.6V (Note 5) 0.5 0.2 % ITH/RUN = 1V (Note 5) –0.5 –0.2 % 3772bfa 2