Datasheet LTC3731 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller |
| 页数 / 页 | 34 / 5 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 384 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LTC3731
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = VRUN/SS = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Differential Amplifier
AV Differential Gain 0.995 1.000 1.005 V/V VOS Input Offset Voltage Magnitude IN+ = IN– = 1.2V, IOUT = 1mA, Input Referred; Gain = 1 0.5 5 mV CMRR Common Mode Rejection Ratio 0V < IN+ = IN– < 5V, IOUT = 1mA, Input Referred 50 70 dB ICL Output Current Sourcing 10 40 mA GBP Gain-Bandwidth Product IOUT = 1mA 2 MHz SR Slew Rate RL = 2k 5 V/µs VO(MAX) Maximum High Output Voltage IOUT = 1mA VCC – 1.2 VCC – 0.8 V RIN Input Resistance Measured at IN+ Pin 80 kΩ
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
Dynamic supply current is higher due to the gate charge being may cause permanent damage to the device. Exposure to any Absolute delivered at the switching frequency. See Applications Information. Maximum Rating condition for extended periods may affect device
Note 5:
The minimum on-time condition corresponds to an inductor reliability and lifetime. peak-to-peak ripple current of ≥40% of IMAX (see minimum on-time
Note 2:
TJ is calculated from the ambient temperature TA and power considerations in the Applications Information Section). dissipation PD according to the following formula:
Note 6:
This IC includes overtemperature protection that is intended LTC3731CG/LTC3731IG: TJ = TA + (PD • 95°C/W) to protect the device during momentary overload conditions. Junction LTC3731CG/LTC3731IG: T temperature will exceed 125°C when overtemperature protection is active. J = TCASE + (PD • 32°C/W) LTC3731CUH/LTC3731IUH: T Continuous operation above the specified maximum operating junction J = TA + (PD • 34°C/W) temperature may impair device reliability.
Note 3:
The IC is tested in a feedback loop that includes the differential amplifier loaded with 100µA to ground driving the error amplifier and servoing the resultant voltage to the midrange point for the error amplifier (VITH = 1.2V). 3731fc 5 Document Outline Features Applications Features Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = VRUN/SS = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Differential Amplifier
AV Differential Gain 0.995 1.000 1.005 V/V VOS Input Offset Voltage Magnitude IN+ = IN– = 1.2V, IOUT = 1mA, Input Referred; Gain = 1 0.5 5 mV CMRR Common Mode Rejection Ratio 0V < IN+ = IN– < 5V, IOUT = 1mA, Input Referred 50 70 dB ICL Output Current Sourcing 10 40 mA GBP Gain-Bandwidth Product IOUT = 1mA 2 MHz SR Slew Rate RL = 2k 5 V/µs VO(MAX) Maximum High Output Voltage IOUT = 1mA VCC – 1.2 VCC – 0.8 V RIN Input Resistance Measured at IN+ Pin 80 kΩ
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
Dynamic supply current is higher due to the gate charge being may cause permanent damage to the device. Exposure to any Absolute delivered at the switching frequency. See Applications Information. Maximum Rating condition for extended periods may affect device
Note 5:
The minimum on-time condition corresponds to an inductor reliability and lifetime. peak-to-peak ripple current of ≥40% of IMAX (see minimum on-time
Note 2:
TJ is calculated from the ambient temperature TA and power considerations in the Applications Information Section). dissipation PD according to the following formula:
Note 6:
This IC includes overtemperature protection that is intended LTC3731CG/LTC3731IG: TJ = TA + (PD • 95°C/W) to protect the device during momentary overload conditions. Junction LTC3731CG/LTC3731IG: T temperature will exceed 125°C when overtemperature protection is active. J = TCASE + (PD • 32°C/W) LTC3731CUH/LTC3731IUH: T Continuous operation above the specified maximum operating junction J = TA + (PD • 34°C/W) temperature may impair device reliability.
Note 3:
The IC is tested in a feedback loop that includes the differential amplifier loaded with 100µA to ground driving the error amplifier and servoing the resultant voltage to the midrange point for the error amplifier (VITH = 1.2V). 3731fc 5 Document Outline Features Applications Features Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts