Datasheet LTC3774 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing |
| 页数 / 页 | 38 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 426 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the specified operating
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LTC3774
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 15V, VRUN = 5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VPG(HYST) PGOOD Trip Level Hysteresis 2 %
INTVCC Linear Regulator
VINTVCC Linear Regulator Voltage 6V < VIN < 38V 5.3 5.5 5.7 V VLDO INT INTVCC Load Regulation ICC = 0mA to 20mA 0.5 2 %
Oscillator and Phase-Locked Loop
fOSC Oscillator Frequency RFREQ < 23.2kΩ 150 kHz VPHSMD = 0V RFREQ = 30.1kΩ 250 kHz RFREQ = 47.5kΩ 540 600 660 kHz RFREQ = 54.9kΩ 750 kHz RFREQ = 75.0kΩ 1.05 MHz Maximum Frequency l 1.2 MHz Minimum Frequency l 0.2 MHz IFREQ FREQ Pin Output Current VFREQ = 0.8V 19 20 21 µA RMODE/PLLIN MODE/PLLIN Input Resistance 250 kΩ VMODE/PLLIN PLLIN Input Threshold VMODE/PLLIN Rising 2 V VMODE/PLLIN Falling 1.2 V VCLKOUT Low Output Voltage ILOAD = –500µA 0.2 V High Output Voltage ILOAD = 500µA 5.2 V θ2 – θ1 Channel 1-2 Phase Delay VPHSMD = 0V 180 Deg VPHSMD = 1/4 INTVCC 180 Deg VPHSMD = Float 180 Deg VPHSMD = 3/4 INTVCC 180 Deg VPHSMD = INTVCC 120 Deg θCLKOUT – θ1 CLKOUT to Channel 1 VPHSMD = 0V 60 Deg Phase Delay VPHSMD = 1/4 INTVCC 60 Deg VPHSMD = Float 90 Deg VPHSMD = 3/4 INTVCC 45 Deg VPHSMD = INTVCC 240 Deg θ1 – θCLKIN Channel 1 to CLKIN Phase Delay VPHSMD = 0V 0 Deg VPHSMD = 1/4 INTVCC 90 Deg VPHSMD = Float 0 Deg VPHSMD = 3/4 INTVCC 0 Deg VPHSMD = INTVCC 0 Deg
PWM/PWMEN Outputs
PWM PWM Output High Voltage ILOAD = 500µA l 5.0 V PWM Output Low Voltage ILOAD = –500µA l 0.5 V PWM Output Current in Hi-Z State l –5 5 µA PWMEN PWMEN Output High Voltage ILOAD = 500µA l 5.0 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings specific operating conditions in conjunction with board layout, the package may cause permanent damage to the device. Exposure to any Absolute thermal impedance and other environmental factors. Maximum Rating condition for extended periods may affect device TJ is calculated from the ambient temperature, TA, and power dissipation, reliability and lifetime. PD, according to the following formula:
Note 2:
The LTC3774 is tested under pulsed load conditions such that LTC3774UHE: TJ = TA + (PD • 43°C/W) TJ ≈ TA. The LTC3774E is guaranteed to meet performance specifications
Note 3:
The LTC3774 is tested in a feedback loop that servos V from 0°C to 85°C operating junction temperature. Specifications over ITH to a specified voltage and measures the resultant V the –40°C to 125°C operating junction temperature range are assured by FB. design, characterization and correlation with statistical process controls.
Note 4:
Dynamic supply current is higher due to the gate charge being The LTC3774I is guaranteed to meet performance specifications over the delivered at the switching frequency. See Applications Information. full –40°C to 125°C operating junction temperature range. The maximum
Note 5:
Guaranteed by design. ambient temperature consistent with these specifications is determined by 3774fc 4 For more information www.linear.com/LTC3774 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 15V, VRUN = 5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VPG(HYST) PGOOD Trip Level Hysteresis 2 %
INTVCC Linear Regulator
VINTVCC Linear Regulator Voltage 6V < VIN < 38V 5.3 5.5 5.7 V VLDO INT INTVCC Load Regulation ICC = 0mA to 20mA 0.5 2 %
Oscillator and Phase-Locked Loop
fOSC Oscillator Frequency RFREQ < 23.2kΩ 150 kHz VPHSMD = 0V RFREQ = 30.1kΩ 250 kHz RFREQ = 47.5kΩ 540 600 660 kHz RFREQ = 54.9kΩ 750 kHz RFREQ = 75.0kΩ 1.05 MHz Maximum Frequency l 1.2 MHz Minimum Frequency l 0.2 MHz IFREQ FREQ Pin Output Current VFREQ = 0.8V 19 20 21 µA RMODE/PLLIN MODE/PLLIN Input Resistance 250 kΩ VMODE/PLLIN PLLIN Input Threshold VMODE/PLLIN Rising 2 V VMODE/PLLIN Falling 1.2 V VCLKOUT Low Output Voltage ILOAD = –500µA 0.2 V High Output Voltage ILOAD = 500µA 5.2 V θ2 – θ1 Channel 1-2 Phase Delay VPHSMD = 0V 180 Deg VPHSMD = 1/4 INTVCC 180 Deg VPHSMD = Float 180 Deg VPHSMD = 3/4 INTVCC 180 Deg VPHSMD = INTVCC 120 Deg θCLKOUT – θ1 CLKOUT to Channel 1 VPHSMD = 0V 60 Deg Phase Delay VPHSMD = 1/4 INTVCC 60 Deg VPHSMD = Float 90 Deg VPHSMD = 3/4 INTVCC 45 Deg VPHSMD = INTVCC 240 Deg θ1 – θCLKIN Channel 1 to CLKIN Phase Delay VPHSMD = 0V 0 Deg VPHSMD = 1/4 INTVCC 90 Deg VPHSMD = Float 0 Deg VPHSMD = 3/4 INTVCC 0 Deg VPHSMD = INTVCC 0 Deg
PWM/PWMEN Outputs
PWM PWM Output High Voltage ILOAD = 500µA l 5.0 V PWM Output Low Voltage ILOAD = –500µA l 0.5 V PWM Output Current in Hi-Z State l –5 5 µA PWMEN PWMEN Output High Voltage ILOAD = 500µA l 5.0 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings specific operating conditions in conjunction with board layout, the package may cause permanent damage to the device. Exposure to any Absolute thermal impedance and other environmental factors. Maximum Rating condition for extended periods may affect device TJ is calculated from the ambient temperature, TA, and power dissipation, reliability and lifetime. PD, according to the following formula:
Note 2:
The LTC3774 is tested under pulsed load conditions such that LTC3774UHE: TJ = TA + (PD • 43°C/W) TJ ≈ TA. The LTC3774E is guaranteed to meet performance specifications
Note 3:
The LTC3774 is tested in a feedback loop that servos V from 0°C to 85°C operating junction temperature. Specifications over ITH to a specified voltage and measures the resultant V the –40°C to 125°C operating junction temperature range are assured by FB. design, characterization and correlation with statistical process controls.
Note 4:
Dynamic supply current is higher due to the gate charge being The LTC3774I is guaranteed to meet performance specifications over the delivered at the switching frequency. See Applications Information. full –40°C to 125°C operating junction temperature range. The maximum
Note 5:
Guaranteed by design. ambient temperature consistent with these specifications is determined by 3774fc 4 For more information www.linear.com/LTC3774 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts