Datasheet LTM8021 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 36VIN, 500mA Step-Down DC/DC µModule |
| 页数 / 页 | 18 / 3 — elecTrical characTerisTics. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 388 Kb |
| 文件语言 | 英语 |
elecTrical characTerisTics. The. denotes the specifications which apply over the full operating
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LTM8021
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VIN = 10V, VRUN/SS = 10V, VBIAS = 3V, RADJ = 31.6k. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOUT(DC) DC Output Voltage VIN = 24V, 0 ≤ IOUT ≤ 500mA RADJ = 31.6k, 0.1% 3.3 V VOUT(AC_RMS) Output Voltage Ripple (RMS) VIN = 24V, IOUT = 250mA 1 mV COUT = 2.2µF, VBIAS = VOUT fSW Switching Frequency IOUT = 500mA 0.9 1.1 1.3 MHz IOSC Short-Circuit Output Current VIN = 36V, VBIAS = VOUT = 0V 900 mA IISC Short-Circuit Input Current VIN = 36V, VBIAS = VOUT = 0V 25 mA ADJ Voltage at ADJ Pin RADJ Open l 0.79 0.80 0.83 V VBIAS(MIN) Minimum BIAS Voltage for Proper IOUT = 500mA 2.2 3 V Operation IADJ Current Out of ADJ Pin VOUT = 5V, VADJ = 0V, RUN/SS = 0V 50 µA IRUN/SS RUN/SS Pin Current VRUN/SS = 2.5V, RADJ Open 23 µA VIH(RUN/SS) RUN/SS Input High Voltage RADJ Open, IOUT = 500mA 1.6 V VIL(RUN/SS) RUN/SS Input Low Voltage RADJ Open, IOUT = 500mA 0.5 V RFB Internal Feedback Resistor RUN/SS = VBIAS = VADJ = 0V 100 kW
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings characterization and correlation with statistical process controls. The may cause permanent damage to the device. Exposure to any Absolute LTM8021I is guaranteed to meet specifications over the full –40°C to Maximum Rating condition for extended periods may affect device 125°C internal operating temperature range. Note that the maximum reliability and lifetime. internal temperature is determined by specific operating conditions in
Note 2:
The LTM8021E is guaranteed to meet performance specifications conjunction with board layout, the rated package thermal resistance and from 0°C to 125°C internal. Specifications over the full –40°C to 125°C other environmental factors. internal operating temperature range are assured by design,
Note 3:
Guaranteed by design. 8021fd For more information www.linear.com/LTM8021 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Package Photo 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, VIN = 10V, VRUN/SS = 10V, VBIAS = 3V, RADJ = 31.6k. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOUT(DC) DC Output Voltage VIN = 24V, 0 ≤ IOUT ≤ 500mA RADJ = 31.6k, 0.1% 3.3 V VOUT(AC_RMS) Output Voltage Ripple (RMS) VIN = 24V, IOUT = 250mA 1 mV COUT = 2.2µF, VBIAS = VOUT fSW Switching Frequency IOUT = 500mA 0.9 1.1 1.3 MHz IOSC Short-Circuit Output Current VIN = 36V, VBIAS = VOUT = 0V 900 mA IISC Short-Circuit Input Current VIN = 36V, VBIAS = VOUT = 0V 25 mA ADJ Voltage at ADJ Pin RADJ Open l 0.79 0.80 0.83 V VBIAS(MIN) Minimum BIAS Voltage for Proper IOUT = 500mA 2.2 3 V Operation IADJ Current Out of ADJ Pin VOUT = 5V, VADJ = 0V, RUN/SS = 0V 50 µA IRUN/SS RUN/SS Pin Current VRUN/SS = 2.5V, RADJ Open 23 µA VIH(RUN/SS) RUN/SS Input High Voltage RADJ Open, IOUT = 500mA 1.6 V VIL(RUN/SS) RUN/SS Input Low Voltage RADJ Open, IOUT = 500mA 0.5 V RFB Internal Feedback Resistor RUN/SS = VBIAS = VADJ = 0V 100 kW
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings characterization and correlation with statistical process controls. The may cause permanent damage to the device. Exposure to any Absolute LTM8021I is guaranteed to meet specifications over the full –40°C to Maximum Rating condition for extended periods may affect device 125°C internal operating temperature range. Note that the maximum reliability and lifetime. internal temperature is determined by specific operating conditions in
Note 2:
The LTM8021E is guaranteed to meet performance specifications conjunction with board layout, the rated package thermal resistance and from 0°C to 125°C internal. Specifications over the full –40°C to 125°C other environmental factors. internal operating temperature range are assured by design,
Note 3:
Guaranteed by design. 8021fd For more information www.linear.com/LTM8021 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Package Photo Typical Application Related Parts