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LT3669 Fiches technique(PDF) 1 Page - Linear Technology |
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LT3669 Fiches technique(HTML) 1 Page - Linear Technology |
1 / 6 page 1 dc1733af DEMO MANUAL DC1733A DESCRIPTION LT3669 Industrial Transceiver with Integrated Step-Down Regulator and LDO Demonstration circuit 1733A is an industrial transceiver withintegratedstep-downregulatorandLDOfeaturingthe LT®3669.Theboardoperatesfrom7.5Vto40VwhenJP7is set to L+. When the JP7 is set to RES, the minimum input voltage is 16.5V. The board withstands transients up to 60V.Thestep-downregulatoroutputis5V.TheLDOoutput is 3.3V. There are two assembly versions. DC1733A-A is for the LT3669 and DC1733A-B is for the LT3669-2. The difference is the LT3669 has an integrated catch diode. The LT3669-2 requires an external catch diode. Table 1 shows the differences between the two versions. L , LTC, LTM, LT, Burst Mode are registered trademarks of Linear Technology Corporation. Other product names may be trademarks of the companies that manufacture the products.. PERFORMANCE SUMMARY The board also provides various interfaces for line drivers and receivers. JP8 to JP11 set the signal sources or levels for TXEN1, TXEN2, TXD1 and TXD2. The LT3669 data sheet gives complete descriptions of the part,operationandapplicationinformation.Thedatasheet must be read in conjunction with this quick start guide for working on or modifying the demo circuit 1733A. Design files for this circuit board are available. Call the LTC Factory. Specifications are at TA = 25°C SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS L+ Input Supply 7.5 40 V VBUCK Output Voltage Step-Down Regulator 4.75 5 5.25 V VLDO Output Voltage LDO 3.135 3.3 3.465 V IBUCK Maximum Buck Output Current LT3669, Step-Down Regulator VBUCK = 5V 100 mA LT3669-2, Step-Down Regulator VBUCK = 5V 300 mA ILDO Maximum LDO Output Current LT3669, VLDO = 3.3V 100 mA LT3669-2, VLDO = 3.3V 150 mA FSW Switching Frequency 600 kHz EFF Efficiency LT3669, L+ = 12V, VBUCK = 5V, IBUCK = 100mA 65 % LT3669-2, L+ = 12V, VBUCK = 5V, IBUCK = 300mA 76 % TRST Reset Timeout Period C5=100nF 12.5 ms Table 1. Version Table ASSY TYPE U1 ILDO IBUCK C8 C9 D6 L1 DC1733A-A LT3669EUFD 0.1A 0.1A 10µF 0.1µF OPEN 82µH, CDRH4D22HPNP-820MC DC1733A-B LT3669EUFD-2 0.15A 0.3A 22µF 0.22µF DFLS160 33µH, CDRH50D28RNP-330MC |
Numéro de pièce similaire - LT3669 |
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Description similaire - LT3669 |
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