Datasheet LTM8029 (Analog Devices) - 8
| Fabricante | Analog Devices |
| Descripción | 36VIN, 600mA Step-Down µModule Converter with 5µA Quiescent Current |
| Páginas / Página | 22 / 8 — PIN FUNCTIONS. VIN (Bank 1):. FB (Pin A2):. VOUT (Bank 3):. RT (Pin B1):. … |
| Revisión | E |
| Formato / tamaño de archivo | PDF / 1.0 Mb |
| Idioma del documento | Inglés |
PIN FUNCTIONS. VIN (Bank 1):. FB (Pin A2):. VOUT (Bank 3):. RT (Pin B1):. GND (Bank 2):. PGOOD (Pin B2):. RUN (Pin A1):. BIAS (Pin H3):
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link to page 12 LTM8029
PIN FUNCTIONS VIN (Bank 1):
The VIN pins supply current to the LTM8029’s
FB (Pin A2):
The LTM8029 regulates its FB pin to 1.2V. internal regulator and to the internal power switch. This Connect the output feedback resistor from this pin to pin must be locally bypassed with an external, low ESR ground. The value of RFB is given by the equation RFB = capacitor; see Table 1 for recommended values. 1200/(VOUT – 1.2), where RFB is in kΩ.
VOUT (Bank 3):
Power Output Pins. Apply the output filter
RT (Pin B1):
The RT pin is used to program the switching capacitor and the output load between these pins and frequency of the LTM8029 by connecting a resistor from GND pins. this pin to ground. The Applications Information section of
GND (Bank 2):
Tie these GND pins to a local ground plane the data sheet includes a table to determine the resistance below the LTM8029 and the circuit components. In most value based on the desired switching frequency. applications the bulk of the heat flow out of the LTM8029
PGOOD (Pin B2):
The PGOOD pin is the open-collector is through these pads, so the printed circuit design has a output of an internal comparator that monitors the FB pin. large impact on the thermal performance of the part. See PGOOD remains low until the FB pin is within 10% of the the PCB Layout and Thermal Considerations sections for final regulation voltage. PGOOD output is valid when VIN more details. Return the feedback resistor (RFB) to this net. is above 4.5V and RUN is high. If this function is not used,
RUN (Pin A1):
Pull the RUN pin below 0.95V to shut down leave this pin floating. the LTM8029. Tie to 1.3V or more for normal operation.
BIAS (Pin H3):
The BIAS pin powers internal circuitry. If the shutdown feature is not used, tie this pin to VIN. Connect to a power source greater than 2.25V and less than 20V. If the output is greater than 2.25V, connect this pin there. Also, make sure that BIAS + VIN is less than 55V. Rev. E 8 For more information www.analog.com 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 Typical Application Package Description Revision History Package Photo Design Resources Related Parts
PIN FUNCTIONS VIN (Bank 1):
The VIN pins supply current to the LTM8029’s
FB (Pin A2):
The LTM8029 regulates its FB pin to 1.2V. internal regulator and to the internal power switch. This Connect the output feedback resistor from this pin to pin must be locally bypassed with an external, low ESR ground. The value of RFB is given by the equation RFB = capacitor; see Table 1 for recommended values. 1200/(VOUT – 1.2), where RFB is in kΩ.
VOUT (Bank 3):
Power Output Pins. Apply the output filter
RT (Pin B1):
The RT pin is used to program the switching capacitor and the output load between these pins and frequency of the LTM8029 by connecting a resistor from GND pins. this pin to ground. The Applications Information section of
GND (Bank 2):
Tie these GND pins to a local ground plane the data sheet includes a table to determine the resistance below the LTM8029 and the circuit components. In most value based on the desired switching frequency. applications the bulk of the heat flow out of the LTM8029
PGOOD (Pin B2):
The PGOOD pin is the open-collector is through these pads, so the printed circuit design has a output of an internal comparator that monitors the FB pin. large impact on the thermal performance of the part. See PGOOD remains low until the FB pin is within 10% of the the PCB Layout and Thermal Considerations sections for final regulation voltage. PGOOD output is valid when VIN more details. Return the feedback resistor (RFB) to this net. is above 4.5V and RUN is high. If this function is not used,
RUN (Pin A1):
Pull the RUN pin below 0.95V to shut down leave this pin floating. the LTM8029. Tie to 1.3V or more for normal operation.
BIAS (Pin H3):
The BIAS pin powers internal circuitry. If the shutdown feature is not used, tie this pin to VIN. Connect to a power source greater than 2.25V and less than 20V. If the output is greater than 2.25V, connect this pin there. Also, make sure that BIAS + VIN is less than 55V. Rev. E 8 For more information www.analog.com 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 Typical Application Package Description Revision History Package Photo Design Resources Related Parts