Datasheet LT3958 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter |
| 页数 / 页 | 30 / 4 — elecTrical characTerisTics. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 783 Kb |
| 文件语言 | 英语 |
elecTrical characTerisTics. The. denotes the specifications which apply over the full operating
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LT3958
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, EN/UVLO = 24V, SENSE2 = 0V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
INTVCC Current Limit VIN = 80V 19 24 29 mA VIN = 20V 50 mA INTVCC Load Regulation (∆VINTVCC /VINTVCC) 0 < IINTVCC < 10mA, VIN = 8V –1 –0.4 % INTVCC Line Regulation (∆VINTVCC /[∆VIN • VINTVCC]) 8V < VIN < 80V 0.005 0.025 %/V Dropout Voltage (VIN – VINTVCC) VIN = 6V, IINTVCC = 10mA, VC = 0V 500 mV INTVCC Current in Shutdown EN/UVLO = 0V, INTVCC = 8V 16 µA INTVCC Voltage to Bypass Internal LDO 7.5 V
Logic Inputs
EN/UVLO Threshold Voltage Falling VIN = INTVCC = 8V l 1.17 1.22 1.27 V EN/UVLO Voltage Hysteresis 20 mV EN/UVLO Input Low Voltage IVIN Drops Below 1µA 0.4 V EN/UVLO Pin Bias Current Low EN/UVLO = 1.15V 1.7 2 2.5 µA EN/UVLO Pin Bias Current High EN/UVLO = 1.33V 10 100 nA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LT3958 is tested in a feedback loop which servos VFBX to the may cause permanent damage to the device. Exposure to any Absolute reference voltages (1.6V and –0.8V) with the VC pin forced to 1.3V. Maximum Rating condition for extended periods may affect device
Note 4:
FBX overvoltage lockout is measured at VFBX(OVERVOLTAGE) relative reliability and lifetime. to regulated VFBX(REG).
Note 2:
The LT3958E is guaranteed to meet performance specifications
Note 5:
For 5V < VIN < 6V, the EN/UVLO pin must not exceed VIN. from the 0°C to 125°C junction temperature. Specifications over the –40°C
Note 6:
EN/UVLO = 1.33V when V to 125°C operating junction temperature range are assured by design, IN = 5V. characterization and correlation with statistical process controls. The LT3958I is guaranteed over the full –40°C to 125°C operating junction temperature range. 3958fa 4 For more information www.linear.com/LT3958 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, EN/UVLO = 24V, SENSE2 = 0V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
INTVCC Current Limit VIN = 80V 19 24 29 mA VIN = 20V 50 mA INTVCC Load Regulation (∆VINTVCC /VINTVCC) 0 < IINTVCC < 10mA, VIN = 8V –1 –0.4 % INTVCC Line Regulation (∆VINTVCC /[∆VIN • VINTVCC]) 8V < VIN < 80V 0.005 0.025 %/V Dropout Voltage (VIN – VINTVCC) VIN = 6V, IINTVCC = 10mA, VC = 0V 500 mV INTVCC Current in Shutdown EN/UVLO = 0V, INTVCC = 8V 16 µA INTVCC Voltage to Bypass Internal LDO 7.5 V
Logic Inputs
EN/UVLO Threshold Voltage Falling VIN = INTVCC = 8V l 1.17 1.22 1.27 V EN/UVLO Voltage Hysteresis 20 mV EN/UVLO Input Low Voltage IVIN Drops Below 1µA 0.4 V EN/UVLO Pin Bias Current Low EN/UVLO = 1.15V 1.7 2 2.5 µA EN/UVLO Pin Bias Current High EN/UVLO = 1.33V 10 100 nA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LT3958 is tested in a feedback loop which servos VFBX to the may cause permanent damage to the device. Exposure to any Absolute reference voltages (1.6V and –0.8V) with the VC pin forced to 1.3V. Maximum Rating condition for extended periods may affect device
Note 4:
FBX overvoltage lockout is measured at VFBX(OVERVOLTAGE) relative reliability and lifetime. to regulated VFBX(REG).
Note 2:
The LT3958E is guaranteed to meet performance specifications
Note 5:
For 5V < VIN < 6V, the EN/UVLO pin must not exceed VIN. from the 0°C to 125°C junction temperature. Specifications over the –40°C
Note 6:
EN/UVLO = 1.33V when V to 125°C operating junction temperature range are assured by design, IN = 5V. characterization and correlation with statistical process controls. The LT3958I is guaranteed over the full –40°C to 125°C operating junction temperature range. 3958fa 4 For more information www.linear.com/LT3958 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts