Datasheet LTC7871 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | Six-Phase, Synchronous Bidirectional Buck or Boost Controller |
| 页数 / 页 | 48 / 7 — 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 full operating
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文件文字版本
link to page 31 link to page 3 LTC7871
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VHIGH = 48V, VRUN = 5V unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS SPI Interface Timing Characteristics (Refer to Timing Diagram in Figure 9 and 10)
tCKH SCLK High Time 45 ns tCSS CSB Setup Time 40 ns tCSH CSB High Time 60 ns tCS SDI to SCLK Setup Time 40 ns tCH SDI to SCLK Hold Time 20 ns tDO SCLK to SDO Time 90 ns tC% SCLK Duty Cycle 45 50 55 % fSCLK(MAX) Maximum SCLK Frequency 5 MHz
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings junction temperature degrades operating lifetimes; operating lifetime may cause permanent damage to the device. Exposure to any Absolute is derated for junction temperatures greater than 125°C. Note that the Maximum Rating condition for extended periods may affect device maximum ambient temperature consistent with these specifications is reliability and lifetime. determined by specific operating conditions in conjunction with board
Note 2:
The LTC7871 is tested under pulsed load conditions such that layout, the rated package thermal impedance and other environmental T factors. J ≈ TA. The LTC7871E is guaranteed to meet performance specifications from 0°C to 85°C junction temperature. Specifications over the –40°C
Note 3:
TJ is calculated from the ambient temperature TA and power to 125°C operating junction temperature range are assured by design, dissipation PD according to the following formula: characterization and correlation with statistical process controls. The TJ = TA + (PD • 17°C/W) LTC7871I is guaranteed over the –40°C to 125°C operating junction
Note 4:
The LTC7871 is tested in a feedback loop that servos V temperature range. The LTC7871J is guaranteed over the –40°C to 150°C ITHHIGH and V operating junction temperature range. The LTC7871H is guaranteed ITHLOW to a specified voltage and measures the resultant VFBHIGH, VFB over the full –40°C to 150°C operating junction temperature range. High LOW, respectively.
Note 5:
Dynamic supply current may be higher due to the loading current at DRVCC linear regulator. Rev. 0 For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Serial Port Serial Port Register Details Typical Applications Package Description 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, VHIGH = 48V, VRUN = 5V unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS SPI Interface Timing Characteristics (Refer to Timing Diagram in Figure 9 and 10)
tCKH SCLK High Time 45 ns tCSS CSB Setup Time 40 ns tCSH CSB High Time 60 ns tCS SDI to SCLK Setup Time 40 ns tCH SDI to SCLK Hold Time 20 ns tDO SCLK to SDO Time 90 ns tC% SCLK Duty Cycle 45 50 55 % fSCLK(MAX) Maximum SCLK Frequency 5 MHz
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings junction temperature degrades operating lifetimes; operating lifetime may cause permanent damage to the device. Exposure to any Absolute is derated for junction temperatures greater than 125°C. Note that the Maximum Rating condition for extended periods may affect device maximum ambient temperature consistent with these specifications is reliability and lifetime. determined by specific operating conditions in conjunction with board
Note 2:
The LTC7871 is tested under pulsed load conditions such that layout, the rated package thermal impedance and other environmental T factors. J ≈ TA. The LTC7871E is guaranteed to meet performance specifications from 0°C to 85°C junction temperature. Specifications over the –40°C
Note 3:
TJ is calculated from the ambient temperature TA and power to 125°C operating junction temperature range are assured by design, dissipation PD according to the following formula: characterization and correlation with statistical process controls. The TJ = TA + (PD • 17°C/W) LTC7871I is guaranteed over the –40°C to 125°C operating junction
Note 4:
The LTC7871 is tested in a feedback loop that servos V temperature range. The LTC7871J is guaranteed over the –40°C to 150°C ITHHIGH and V operating junction temperature range. The LTC7871H is guaranteed ITHLOW to a specified voltage and measures the resultant VFBHIGH, VFB over the full –40°C to 150°C operating junction temperature range. High LOW, respectively.
Note 5:
Dynamic supply current may be higher due to the loading current at DRVCC linear regulator. Rev. 0 For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Serial Port Serial Port Register Details Typical Applications Package Description Typical Application Related Parts