Datasheet LTC3448 (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | 1.5MHz/2.25MHz, 600mA Synchronous Step-Down Regulator with LDO Mode |
| 页数 / 页 | 20 / 2 — ABSOLUTE AXI U RATI GS (Note 1). PACKAGE/ORDER I FOR ATIO. ELECTRICAL … |
| 文件格式/大小 | PDF / 284 Kb |
| 文件语言 | 英语 |
ABSOLUTE AXI U RATI GS (Note 1). PACKAGE/ORDER I FOR ATIO. ELECTRICAL CHARACTERISTICS The
该数据表的模型线
文件文字版本
LTC3448
W W W U ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage .. – 0.3V to 6V VOUT (LDO) Source Current .. 25mA RUN, SYNC Voltages ... – 0.3V to (VIN + 0.3V) Peak SW Sink and Source Current .. 1.3A MODE Voltage ... – 0.3V to (VIN + 0.3V) Operating Temperature Range (Note 2) .. – 40°C to 85°C FREQ, VFB Voltages.. – 0.3V to (VIN + 0.3V) Junction Temperature (Notes 3, 7) .. 125°C SW Voltage .. – 0.3V to (VIN + 0.3V) Storage Temperature Range .. – 65°C to 125°C VOUT Voltage .. – 0.3V to (VIN + 0.3V) Lead Temperature (Soldering, 10 sec) P-Channel Switch Source Current (DC) ... 800mA MSOP Only .. 300°C N-Channel Switch Sink Current (DC) ... 800mA
U W U PACKAGE/ORDER I FOR ATIO
TOP VIEW ORDER PART ORDER PART NUMBER NUMBER TOP VIEW V 1 8 FB RUN LTC3448EDD V 1 FB 8 RUN LTC3448EMS8E V 2 7 OUT SYNC V 2 7 SYNC 9 OUT 9 MODE 3 6 FREQ MODE 3 6 FREQ V 4 5 SW V IN IN 4 5 SW MS8E PACKAGE DD PART MARKING 8-LEAD PLASTIC MSOP MS8 PART MARKING DD PACKAGE TJMAX = 125°C, θJA = 40°C/ W 8-LEAD (3mm × 3mm) PLASTIC DFN LBMJ EXPOSED PAD (PIN 9) IS GND LTBMK TJMAX = 125°C, θJA = 43°C/ W MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 9) IS GND MUST BE SOLDERED TO PCB Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current ● ±30 nA VFB Regulated Feedback Voltage TA = 25°C 0.5880 0.6 0.6120 V (Note 4) 0°C ≤ TA ≤ 85°C 0.5865 0.6 0.6135 V –40°C ≤ TA ≤ 85°C ● 0.5850 0.6 0.6150 V ∆VFB Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 4) ● 0.2 0.4 %/V ∆VOVL Output Overvoltage Lockout ∆VOVL = VOVL – VFB 15 35 55 mV ∆VOVL = (VOVL – VOUT) • 100/VOUT 2.5 5.8 9.2 % ∆VOUT Output Voltage Line Regulation VIN = 2.5V to 5.5V (LDO) 0.1 0.8 %/V IPK Peak Inductor Current VFB = 0.5V or VOUT = 90%, 0.7 1 1.3 A Duty Cycle < 35% VLOADREG Output Voltage Load Regulation LDO, 1mA to 10mA 0.5 %/V VOUT(MAX) Maximum Output Voltage (Note 9) VIN – 0.7 VIN – 0.3 V VIN Input Voltage Range ● 2.5 5.5 V 3448f 2
W W W U ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage .. – 0.3V to 6V VOUT (LDO) Source Current .. 25mA RUN, SYNC Voltages ... – 0.3V to (VIN + 0.3V) Peak SW Sink and Source Current .. 1.3A MODE Voltage ... – 0.3V to (VIN + 0.3V) Operating Temperature Range (Note 2) .. – 40°C to 85°C FREQ, VFB Voltages.. – 0.3V to (VIN + 0.3V) Junction Temperature (Notes 3, 7) .. 125°C SW Voltage .. – 0.3V to (VIN + 0.3V) Storage Temperature Range .. – 65°C to 125°C VOUT Voltage .. – 0.3V to (VIN + 0.3V) Lead Temperature (Soldering, 10 sec) P-Channel Switch Source Current (DC) ... 800mA MSOP Only .. 300°C N-Channel Switch Sink Current (DC) ... 800mA
U W U PACKAGE/ORDER I FOR ATIO
TOP VIEW ORDER PART ORDER PART NUMBER NUMBER TOP VIEW V 1 8 FB RUN LTC3448EDD V 1 FB 8 RUN LTC3448EMS8E V 2 7 OUT SYNC V 2 7 SYNC 9 OUT 9 MODE 3 6 FREQ MODE 3 6 FREQ V 4 5 SW V IN IN 4 5 SW MS8E PACKAGE DD PART MARKING 8-LEAD PLASTIC MSOP MS8 PART MARKING DD PACKAGE TJMAX = 125°C, θJA = 40°C/ W 8-LEAD (3mm × 3mm) PLASTIC DFN LBMJ EXPOSED PAD (PIN 9) IS GND LTBMK TJMAX = 125°C, θJA = 43°C/ W MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 9) IS GND MUST BE SOLDERED TO PCB Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current ● ±30 nA VFB Regulated Feedback Voltage TA = 25°C 0.5880 0.6 0.6120 V (Note 4) 0°C ≤ TA ≤ 85°C 0.5865 0.6 0.6135 V –40°C ≤ TA ≤ 85°C ● 0.5850 0.6 0.6150 V ∆VFB Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 4) ● 0.2 0.4 %/V ∆VOVL Output Overvoltage Lockout ∆VOVL = VOVL – VFB 15 35 55 mV ∆VOVL = (VOVL – VOUT) • 100/VOUT 2.5 5.8 9.2 % ∆VOUT Output Voltage Line Regulation VIN = 2.5V to 5.5V (LDO) 0.1 0.8 %/V IPK Peak Inductor Current VFB = 0.5V or VOUT = 90%, 0.7 1 1.3 A Duty Cycle < 35% VLOADREG Output Voltage Load Regulation LDO, 1mA to 10mA 0.5 %/V VOUT(MAX) Maximum Output Voltage (Note 9) VIN – 0.7 VIN – 0.3 V VIN Input Voltage Range ● 2.5 5.5 V 3448f 2