Datasheet LTC3414 (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | 4A, 4MHz, Monolithic Synchronous Step-Down Regulator |
| 页数 / 页 | 16 / 2 — ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order … |
| 文件格式/大小 | PDF / 280 Kb |
| 文件语言 | 英语 |
ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order Options. ELECTRICAL CHARACTERISTICS The
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LTC3414
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW Input Supply Voltage ... –0.3V to 6V ORDER PART PGND 1 20 PGND I RT 2 19 VFB NUMBER TH, RUN/SS, VFB, SYNC/MODE Voltages .. –0.3 to V SYNC/MODE 3 18 ITH IN RUN/SS 4 17 PGOOD LTC3414EFE SW Voltages ... –0.3V to (VIN + 0.3V) SGND 5 16 SVIN 21 LTC3414IFE Peak SW Sink and Source Current ... 9.5A NC 6 15 NC PV 7 14 IN PVIN LTC3414MPFE Operating Temperature Range (Note 2) SW 8 13 SW E, I Grades .. – 40°C to 85°C SW 9 12 SW PGND 10 11 PGND MP Grade ... – 55°C to 125°C FE PACKAGE Junction Temperature (Notes 5, 6) ... 125°C 20-LEAD PLASTIC TSSOP EXPOSED PAD (PIN 21), MUST BE SOLDERED TO PCB Storage Temperature Range ... – 65°C to 150°C TJMAX = 125°C, θJA = 38°C/W, θJC = 10°C/W Lead Temperature (Soldering, 10 sec).. 300°C
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/
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 3.3V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Voltage Range ● 2.25 5.5 V IFB Feedback Pin Input Current (Note 3) 0.2 μA VFB Regulated Feedback Voltage E, I Grade (Note 3) ● 0.784 0.800 0.816 V MP Grade 0.780 0.800 0.816 V ΔVFB Reference Voltage Line Regulation VIN = 2.7V to 5.5V (Note 3) ● 0.04 0.2 %V VLOADREG Output Voltage Load Regulation Measured in Servo Loop, VITH = 0.36V ● 0.02 0.2 % Mesured in Servo Loop, VITH = 0.84V ● –0.02 –0.2 % ΔVPGOOD Power Good Range ±7.5 ±9 % RPGOOD Power Good Resistance 120 200 Ω IQ Input DC Bias Current (Note 4) Active Current VFB = 0.75V, VITH = 1.2V 250 330 μA Sleep VFB = 1V, VITH = 0V, VSYNC/MODE = 0V 64 100 μA Shutdown VRUN = 0V 0.02 1 μA fOSC Switching Frequency ROSC = 294k 0.88 1.00 1.12 MHz Switching Frequency Range 0.3 4 MHz fSYNC SYNC Capture Range 0.3 4 MHz RPFET RDS(ON) of P-Channel FET ISW = 300mA 67 100 mΩ RNFET RDS(ON) of N-Channel FET ISW = –300mA 50 100 mΩ ILIMIT Peak Current Limit 6 8 A VUVLO Undervoltage Lockout Threshold 1.75 2.00 2.25 V ILSW SW Leakage Current VRUN = 0V, VIN = 5.5V 0.1 1.0 μA VRUN RUN Threshold 0.5 0.65 0.8 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings achieve a specified error amplifier output voltage (ITH). may cause permanent damage to the device. Exposure to any Absolute
Note 4:
Dynamic supply current is higher due to the internal gate charge Maximum Rating condition for extended periods may affect device being delivered at the switching frequency. reliability and lifetime.
Note 5:
TJ is calculated from the ambient temperature TA and power
Note 2:
The LTC3414E is guaranteed to meet performance specifications dissipation PD as follows: TJ =TA + (PD)(38°C/W) from 0°C to 85°C. Specifications over the –40°C to 85°C operating
Note 6:
This IC includes overtemperature protection that is intended to temperature range are assured by design, characterization and correlation protect the device during momentary overload conditions. Junction with statistical process controls. The LTC3414I is guaranteed over the full temperature will exceed 125°C when overtemperature protection is active. –40°C to 85°C operating temperature range. The LTC3414MP is Continuous operation above the specified maximum operating junction guaranteed over the full –55°C to 125°C operating tempaerature range. temperature may impair device reliabability.
Note 3:
The LTC3414 is tested in a feedback loop that adjusts VFB to 3414fb 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW Input Supply Voltage ... –0.3V to 6V ORDER PART PGND 1 20 PGND I RT 2 19 VFB NUMBER TH, RUN/SS, VFB, SYNC/MODE Voltages .. –0.3 to V SYNC/MODE 3 18 ITH IN RUN/SS 4 17 PGOOD LTC3414EFE SW Voltages ... –0.3V to (VIN + 0.3V) SGND 5 16 SVIN 21 LTC3414IFE Peak SW Sink and Source Current ... 9.5A NC 6 15 NC PV 7 14 IN PVIN LTC3414MPFE Operating Temperature Range (Note 2) SW 8 13 SW E, I Grades .. – 40°C to 85°C SW 9 12 SW PGND 10 11 PGND MP Grade ... – 55°C to 125°C FE PACKAGE Junction Temperature (Notes 5, 6) ... 125°C 20-LEAD PLASTIC TSSOP EXPOSED PAD (PIN 21), MUST BE SOLDERED TO PCB Storage Temperature Range ... – 65°C to 150°C TJMAX = 125°C, θJA = 38°C/W, θJC = 10°C/W Lead Temperature (Soldering, 10 sec).. 300°C
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/
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 3.3V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Voltage Range ● 2.25 5.5 V IFB Feedback Pin Input Current (Note 3) 0.2 μA VFB Regulated Feedback Voltage E, I Grade (Note 3) ● 0.784 0.800 0.816 V MP Grade 0.780 0.800 0.816 V ΔVFB Reference Voltage Line Regulation VIN = 2.7V to 5.5V (Note 3) ● 0.04 0.2 %V VLOADREG Output Voltage Load Regulation Measured in Servo Loop, VITH = 0.36V ● 0.02 0.2 % Mesured in Servo Loop, VITH = 0.84V ● –0.02 –0.2 % ΔVPGOOD Power Good Range ±7.5 ±9 % RPGOOD Power Good Resistance 120 200 Ω IQ Input DC Bias Current (Note 4) Active Current VFB = 0.75V, VITH = 1.2V 250 330 μA Sleep VFB = 1V, VITH = 0V, VSYNC/MODE = 0V 64 100 μA Shutdown VRUN = 0V 0.02 1 μA fOSC Switching Frequency ROSC = 294k 0.88 1.00 1.12 MHz Switching Frequency Range 0.3 4 MHz fSYNC SYNC Capture Range 0.3 4 MHz RPFET RDS(ON) of P-Channel FET ISW = 300mA 67 100 mΩ RNFET RDS(ON) of N-Channel FET ISW = –300mA 50 100 mΩ ILIMIT Peak Current Limit 6 8 A VUVLO Undervoltage Lockout Threshold 1.75 2.00 2.25 V ILSW SW Leakage Current VRUN = 0V, VIN = 5.5V 0.1 1.0 μA VRUN RUN Threshold 0.5 0.65 0.8 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings achieve a specified error amplifier output voltage (ITH). may cause permanent damage to the device. Exposure to any Absolute
Note 4:
Dynamic supply current is higher due to the internal gate charge Maximum Rating condition for extended periods may affect device being delivered at the switching frequency. reliability and lifetime.
Note 5:
TJ is calculated from the ambient temperature TA and power
Note 2:
The LTC3414E is guaranteed to meet performance specifications dissipation PD as follows: TJ =TA + (PD)(38°C/W) from 0°C to 85°C. Specifications over the –40°C to 85°C operating
Note 6:
This IC includes overtemperature protection that is intended to temperature range are assured by design, characterization and correlation protect the device during momentary overload conditions. Junction with statistical process controls. The LTC3414I is guaranteed over the full temperature will exceed 125°C when overtemperature protection is active. –40°C to 85°C operating temperature range. The LTC3414MP is Continuous operation above the specified maximum operating junction guaranteed over the full –55°C to 125°C operating tempaerature range. temperature may impair device reliabability.
Note 3:
The LTC3414 is tested in a feedback loop that adjusts VFB to 3414fb 2