Datasheet LTC3892, LTC3892-1, LTC3892-2 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller |
| 页数 / 页 | 38 / 6 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 1.4 Mb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the specified operating
该数据表的模型线
- LTC3892EFE-1#PBF LTC3892EFE-1#TRPBF LTC3892EUH#PBF LTC3892EUH#TRPBF LTC3892EUH-2#PBF LTC3892EUH-2#TRPBF LTC3892HFE-1#PBF LTC3892HFE-1#TRPBF LTC3892HUH#PBF LTC3892HUH#TRPBF LTC3892HUH-2#PBF LTC3892HUH-2#TRPBF LTC3892IFE-1#PBF LTC3892IFE-1#TRPBF LTC3892IUH#PBF LTC3892IUH#TRPBF LTC3892IUH-2#PBF LTC3892IUH-2#TRPBF LTC3892MPFE-1#PBF LTC3892MPFE-1#TRPBF LTC3892MPUH#PBF LTC3892MPUH#TRPBF LTC3892MPUH-2#PBF LTC3892MPUH-2#TRPBF
文件文字版本
LTC3892/ LTC3892-1/LTC3892-2
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 = 12V, VRUN1,2,3 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG1 = FLOAT unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Oscillator and Phase-Locked Loop
f25kΩ Programmable Frequency RFREQ =25kΩ, PLLIN/MODE = DC Voltage 105 kHz f65kΩ Programmable Frequency RFREQ = 65kΩ, PLLIN/MODE = DC Voltage 375 440 505 kHz f105kΩ Programmable Frequency RFREQ = 105kΩ, PLLIN/MODE = DC Voltage 835 kHz fLOW Low Fixed Frequency VFREQ = 0V, PLLIN/MODE = DC Voltage 320 350 380 kHz fHIGH High Fixed Frequency VFREQ = INTVCC, PLLIN/MODE = DC Voltage 485 535 585 kHz fSYNC Synchronizable Frequency PLLIN/MODE = External Clock l 75 850 kHz PLLIN VIH PLLIN/MODE Input High Level PLLIN/MODE = External Clock l 2.5 V PLLIN VIL PLLIN/MODE Input Low Level PLLIN/MODE = External Clock l 0.5 V
PGOOD1 and PGOOD2 Outputs (LTC3892/LTC3892-2)
VPGL PGOOD Voltage Low IPGOOD = 2mA 0.2 0.4 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±1 µA VPG PGOOD Trip Level VFB with Respect to Set Regulated Voltage VFB Ramping Negative –13 –10 –7 % Hysteresis 2.5 % VFB with Respect to Set Regulated Voltage VFB Ramping Positive 7 10 13 % Hysteresis 2.5 % tPG Delay for Reporting a Fault 35 µs
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings may
Note 3:
This IC includes overtemperature protection that is intended to cause permanent damage to the device. Exposure to any Absolute Maximum protect the device during momentary overload conditions. The maximum Ratings for extended periods may affect device reliability and lifetime. rated junction temperature will be exceeded when this protection is active.
Note 2:
The LTC3892/LTC3892-1/LTC3892-2 is tested under pulsed load Continuous operation above the specified absolute maximum operating conditions such that T junction temperature may impair device reliability or permanently damage J ≈ TA. The LTC3892E/LTC3892E-1/LTC3892E-2 is guaranteed to meet performance specifications from 0°C to 85°C. the device. Specifications over the –40°C to 125°C operating junction temperature
Note 4:
The LTC3892/LTC3892-1/LTC3892-2 is tested in a feedback loop range are assured by design, characterization and correlation with that servos VITH1,2 to a specified voltage and measures the resultant statistical process controls. The LTC3892I/LTC3892I-1/LTC3892I-2 is VFB1,2. The specification at 85°C is not tested in production and is assured guaranteed over the –40°C to 125°C operating junction temperature by design, characterization and correlation to production testing at other range, the LTC3892H/LTC3892H-1/LTC3892H-2 is guaranteed over temperatures (125°C for the LTC3892E/LTC3892E-1/LTC3892E-2 and the –40°C to 150°C operating junction temperature range, and the LTC3892I/LTC3892I-1/LTC3892I-2, 150°C for the LTC3892H/LTC3892H-1/ LTC3892MP/LTC3892MP-1/LTC3892MP-2 is tested and guaranteed over LTC3892H-2 and LTC3892MP/LTC3892MP-1/LTC3892MP-2). For the –55°C to 150°C operating junction temperature range. High junction the LTC3892I/LTC3892I-1/LTC3892I-2 and LTC3892H/LTC3892H-1/ temperatures degrade operating lifetimes; operating lifetime is derated LTC3892H-2, the specification at 0°C is not tested in production and for junction temperatures greater than 125°C. Note that the maximum is assured by design, characterization and correlation to production ambient temperature consistent with these specifications is determined by testing at –40°C. For the LTC3892MP/LTC3892MP-1/LTC3892MP-2, the specific operating conditions in conjunction with board layout, the rated specification at 0°C is not tested in production and is assured by design, package thermal impedance and other environmental factors. The junction characterization and correlation to production testing at –55°C. temperature (TJ, in °C) is calculated from the ambient temperature
Note 5:
Dynamic supply current is higher due to the gate charge being (TA, in °C) and power dissipation (PD, in Watts) according to the formula: delivered at the switching frequency. See Applications information. TJ = TA + (PD • θJA)
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay where θJA = 44°C/W for the QFN package and where θJA = 30°C/W for the times are measured using 50% levels TSSOP package.
Note 7:
The minimum on-time condition is specified for an inductor peak-to-peak ripple current >40% of IMAX (See Minimum On-Time Considerations in the Applications Information section)
Note 8:
Do not apply a voltage or current source to these pins. They must be connected to capacitive loads only, otherwise permanent damage may occur. 38921fc 6 For more information www.linear.com/LTC3892 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagrams Operation 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 = 12V, VRUN1,2,3 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG1 = FLOAT unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Oscillator and Phase-Locked Loop
f25kΩ Programmable Frequency RFREQ =25kΩ, PLLIN/MODE = DC Voltage 105 kHz f65kΩ Programmable Frequency RFREQ = 65kΩ, PLLIN/MODE = DC Voltage 375 440 505 kHz f105kΩ Programmable Frequency RFREQ = 105kΩ, PLLIN/MODE = DC Voltage 835 kHz fLOW Low Fixed Frequency VFREQ = 0V, PLLIN/MODE = DC Voltage 320 350 380 kHz fHIGH High Fixed Frequency VFREQ = INTVCC, PLLIN/MODE = DC Voltage 485 535 585 kHz fSYNC Synchronizable Frequency PLLIN/MODE = External Clock l 75 850 kHz PLLIN VIH PLLIN/MODE Input High Level PLLIN/MODE = External Clock l 2.5 V PLLIN VIL PLLIN/MODE Input Low Level PLLIN/MODE = External Clock l 0.5 V
PGOOD1 and PGOOD2 Outputs (LTC3892/LTC3892-2)
VPGL PGOOD Voltage Low IPGOOD = 2mA 0.2 0.4 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±1 µA VPG PGOOD Trip Level VFB with Respect to Set Regulated Voltage VFB Ramping Negative –13 –10 –7 % Hysteresis 2.5 % VFB with Respect to Set Regulated Voltage VFB Ramping Positive 7 10 13 % Hysteresis 2.5 % tPG Delay for Reporting a Fault 35 µs
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings may
Note 3:
This IC includes overtemperature protection that is intended to cause permanent damage to the device. Exposure to any Absolute Maximum protect the device during momentary overload conditions. The maximum Ratings for extended periods may affect device reliability and lifetime. rated junction temperature will be exceeded when this protection is active.
Note 2:
The LTC3892/LTC3892-1/LTC3892-2 is tested under pulsed load Continuous operation above the specified absolute maximum operating conditions such that T junction temperature may impair device reliability or permanently damage J ≈ TA. The LTC3892E/LTC3892E-1/LTC3892E-2 is guaranteed to meet performance specifications from 0°C to 85°C. the device. Specifications over the –40°C to 125°C operating junction temperature
Note 4:
The LTC3892/LTC3892-1/LTC3892-2 is tested in a feedback loop range are assured by design, characterization and correlation with that servos VITH1,2 to a specified voltage and measures the resultant statistical process controls. The LTC3892I/LTC3892I-1/LTC3892I-2 is VFB1,2. The specification at 85°C is not tested in production and is assured guaranteed over the –40°C to 125°C operating junction temperature by design, characterization and correlation to production testing at other range, the LTC3892H/LTC3892H-1/LTC3892H-2 is guaranteed over temperatures (125°C for the LTC3892E/LTC3892E-1/LTC3892E-2 and the –40°C to 150°C operating junction temperature range, and the LTC3892I/LTC3892I-1/LTC3892I-2, 150°C for the LTC3892H/LTC3892H-1/ LTC3892MP/LTC3892MP-1/LTC3892MP-2 is tested and guaranteed over LTC3892H-2 and LTC3892MP/LTC3892MP-1/LTC3892MP-2). For the –55°C to 150°C operating junction temperature range. High junction the LTC3892I/LTC3892I-1/LTC3892I-2 and LTC3892H/LTC3892H-1/ temperatures degrade operating lifetimes; operating lifetime is derated LTC3892H-2, the specification at 0°C is not tested in production and for junction temperatures greater than 125°C. Note that the maximum is assured by design, characterization and correlation to production ambient temperature consistent with these specifications is determined by testing at –40°C. For the LTC3892MP/LTC3892MP-1/LTC3892MP-2, the specific operating conditions in conjunction with board layout, the rated specification at 0°C is not tested in production and is assured by design, package thermal impedance and other environmental factors. The junction characterization and correlation to production testing at –55°C. temperature (TJ, in °C) is calculated from the ambient temperature
Note 5:
Dynamic supply current is higher due to the gate charge being (TA, in °C) and power dissipation (PD, in Watts) according to the formula: delivered at the switching frequency. See Applications information. TJ = TA + (PD • θJA)
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay where θJA = 44°C/W for the QFN package and where θJA = 30°C/W for the times are measured using 50% levels TSSOP package.
Note 7:
The minimum on-time condition is specified for an inductor peak-to-peak ripple current >40% of IMAX (See Minimum On-Time Considerations in the Applications Information section)
Note 8:
Do not apply a voltage or current source to these pins. They must be connected to capacitive loads only, otherwise permanent damage may occur. 38921fc 6 For more information www.linear.com/LTC3892 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagrams Operation Package Description Typical Application Related Parts