Datasheet LTC3406AB (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT |
| 页数 / 页 | 18 / 3 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 721 Kb |
| 文件语言 | 英语 |
e lecTrical characTerisTics The. denotes the specifications which apply over the full operating
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LTC3406AB
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current l ±30 nA VFB Regulated Feedback Voltage (Note 4) l 0.5880 0.6 0.6120 V DVFB Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 4) l 0.04 0.4 %/V IPK Peak Inductor Current VIN = 3V, VFB = 0.5V 0.75 1 1.25 A Duty Cycle < 35% VLOADREG Output Voltage Load Regulation 0.5 % VIN Input Voltage Range l 2.5 5.5 V IS Input DC Bias Current (Note 5) Active Mode VFB = 0.63V 200 300 µA Shutdown VRUN = 0V, VIN = 5.5V 0.1 1 µA fOSC Oscillator Frequency VFB = 0.6V l 1.2 1.5 1.8 MHz RPFET RDS(ON) of P-Channel FET ISW = 100mA 0.23 0.35 W RNFET RDS(ON) of N-Channel FET ISW = –100mA 0.21 0.35 W ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.01 ±1 µA tSOFTSTART Soft-Start Time VFB from 10% to 90% Full-scale 0.6 0.9 1.2 ms VRUN RUN Threshold l 0.3 1 1.5 V IRUN RUN Leakage Current l ±0.01 ±1 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
The LTC3406AB is tested in a proprietary test mode that connects may cause permanent damage to the device. Exposure to any Absolute VFB to the output of the error amplifier. Maximum Rating condition for extended periods may affect device
Note 5:
Dynamic supply current is higher due to the gate charge being reliability and lifetime. delivered at the switching frequency.
Note 2:
The LTC3406ABE is guaranteed to meet performance
Note 6:
This IC includes overtemperature protection that is intended specifications from 0°C to 85°C. Specifications over the –40°C to 85°C to protect the device during momentary overload conditions. Junction operating temperature range are assured by design, characterization and temperature will exceed 125°C when overtemperature protection is active. correlation with statistical process controls. Continuous operation above the specified maximum operating junction
Note 3:
TJ is calculated from the ambient temperature TA and power temperature may impair device reliability. dissipation PD according to the following formula:
Note 7:
Limited by long term current density considerations. LTC3406AB: TJ = TA + (PD)(250°C/W) 3406abfb For more information www.linear.com/LTC3406AB 3
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current l ±30 nA VFB Regulated Feedback Voltage (Note 4) l 0.5880 0.6 0.6120 V DVFB Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 4) l 0.04 0.4 %/V IPK Peak Inductor Current VIN = 3V, VFB = 0.5V 0.75 1 1.25 A Duty Cycle < 35% VLOADREG Output Voltage Load Regulation 0.5 % VIN Input Voltage Range l 2.5 5.5 V IS Input DC Bias Current (Note 5) Active Mode VFB = 0.63V 200 300 µA Shutdown VRUN = 0V, VIN = 5.5V 0.1 1 µA fOSC Oscillator Frequency VFB = 0.6V l 1.2 1.5 1.8 MHz RPFET RDS(ON) of P-Channel FET ISW = 100mA 0.23 0.35 W RNFET RDS(ON) of N-Channel FET ISW = –100mA 0.21 0.35 W ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.01 ±1 µA tSOFTSTART Soft-Start Time VFB from 10% to 90% Full-scale 0.6 0.9 1.2 ms VRUN RUN Threshold l 0.3 1 1.5 V IRUN RUN Leakage Current l ±0.01 ±1 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
The LTC3406AB is tested in a proprietary test mode that connects may cause permanent damage to the device. Exposure to any Absolute VFB to the output of the error amplifier. Maximum Rating condition for extended periods may affect device
Note 5:
Dynamic supply current is higher due to the gate charge being reliability and lifetime. delivered at the switching frequency.
Note 2:
The LTC3406ABE is guaranteed to meet performance
Note 6:
This IC includes overtemperature protection that is intended specifications from 0°C to 85°C. Specifications over the –40°C to 85°C to protect the device during momentary overload conditions. Junction operating temperature range are assured by design, characterization and temperature will exceed 125°C when overtemperature protection is active. correlation with statistical process controls. Continuous operation above the specified maximum operating junction
Note 3:
TJ is calculated from the ambient temperature TA and power temperature may impair device reliability. dissipation PD according to the following formula:
Note 7:
Limited by long term current density considerations. LTC3406AB: TJ = TA + (PD)(250°C/W) 3406abfb For more information www.linear.com/LTC3406AB 3