Datasheet LTM8049 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Dual SEPIC or Inverting μModule DC/DC Converter |
| Pages / Page | 20 / 8 — PIN FUNCTIONS FBX1, FBX2 (Pins C1, J1):. CLKOUT1, CLKOUT2 (Pins E6, G6):. … |
| Revision | B |
| File Format / Size | PDF / 2.0 Mb |
| Document Language | English |
PIN FUNCTIONS FBX1, FBX2 (Pins C1, J1):. CLKOUT1, CLKOUT2 (Pins E6, G6):. PG1, PG2 (Pins D6, H6):. SHARE1, 2 (pins F3, F4):
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Text Version of Document
link to page 10 LTM8049
PIN FUNCTIONS FBX1, FBX2 (Pins C1, J1):
If configured as a SEPIC, the
CLKOUT1, CLKOUT2 (Pins E6, G6):
Use these pins to LTM8049 regulates its FBX pin to 1.204V. Apply a resis- synchronize devices to either channel of the LTM8049. tor between FBX and VOUTP. Its value should be RFB = These pins oscillate at the same frequency as the [(VOUTP – 1.204)/0.0833]k. If the LTM8049 is configured LTM8049 internal oscillator or, if active, the SYNC pin. as an inverting converter, the LTM8049 regulates the FBX The CLKOUT1 signal is about 180° out of phase with the pin to 7mV. Apply a resistor between FBX and VOUTN of oscillator of channel 1 and duty cycle is about 50%. The value RFB = [(|VOUTN| + 0.007)/0.0833]k. The LTM8049 CLKOUT2 signal is in phase with the internal oscillator features frequency foldback to protect the power switches of channel 2 and its duty cycle varies linearly with the during a fault or output current overload. During start-up, internal temperature of the LTM8049. Please refer to the frequency foldback also limits the current the LTM8049 Applications Information section for detailed information delivers to the load. The user must evaluate the start-up on using CLKOUT2 as an indication of the LTM8049 inter- behavior of the LTM8049 to ensure that it properly pow- nal temperature. Do not apply a voltage to this pin or use ers up the load. this pin to drive capacitive loads greater than 120pF.
PG1, PG2 (Pins D6, H6):
These active high pins indicates
SHARE1, 2 (pins F3, F4):
Connect these pins together if that the FBn pin voltage for the corresponding channel the two outputs of the LTM8049 are paralleled. Otherwise, is within 4% of its regulation voltage These open drain leave these pins floating. outputs requires a pull-up resistor to indicate power good. Also, the status of these pins is valid only when RUN > 1.4V and VIN > 2.6V. Rev B 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 Applications Package Description Package Photo Revision History Typical Application Related Parts
PIN FUNCTIONS FBX1, FBX2 (Pins C1, J1):
If configured as a SEPIC, the
CLKOUT1, CLKOUT2 (Pins E6, G6):
Use these pins to LTM8049 regulates its FBX pin to 1.204V. Apply a resis- synchronize devices to either channel of the LTM8049. tor between FBX and VOUTP. Its value should be RFB = These pins oscillate at the same frequency as the [(VOUTP – 1.204)/0.0833]k. If the LTM8049 is configured LTM8049 internal oscillator or, if active, the SYNC pin. as an inverting converter, the LTM8049 regulates the FBX The CLKOUT1 signal is about 180° out of phase with the pin to 7mV. Apply a resistor between FBX and VOUTN of oscillator of channel 1 and duty cycle is about 50%. The value RFB = [(|VOUTN| + 0.007)/0.0833]k. The LTM8049 CLKOUT2 signal is in phase with the internal oscillator features frequency foldback to protect the power switches of channel 2 and its duty cycle varies linearly with the during a fault or output current overload. During start-up, internal temperature of the LTM8049. Please refer to the frequency foldback also limits the current the LTM8049 Applications Information section for detailed information delivers to the load. The user must evaluate the start-up on using CLKOUT2 as an indication of the LTM8049 inter- behavior of the LTM8049 to ensure that it properly pow- nal temperature. Do not apply a voltage to this pin or use ers up the load. this pin to drive capacitive loads greater than 120pF.
PG1, PG2 (Pins D6, H6):
These active high pins indicates
SHARE1, 2 (pins F3, F4):
Connect these pins together if that the FBn pin voltage for the corresponding channel the two outputs of the LTM8049 are paralleled. Otherwise, is within 4% of its regulation voltage These open drain leave these pins floating. outputs requires a pull-up resistor to indicate power good. Also, the status of these pins is valid only when RUN > 1.4V and VIN > 2.6V. Rev B 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 Applications Package Description Package Photo Revision History Typical Application Related Parts
