ASPL317LDT-R Adjustable Positive Voltage Regulator for Power Supply DC-DC Converters

ASPL317LDT-R Adjustable LDO Voltage Regulator | 3-Terminal Positive Regulator for Power Supply and DC-DC Converter Repair

The ASPL317LDT-R is an adjustable 3-terminal positive voltage regulator designed for power supply and DC-DC converter repair. Delivers up to 1A output current with an adjustable output voltage from 1.3V to 35V, set with a single resistor divider — the workhorse part for low-current auxiliary rails on ASIC miner PSUs, control board peripherals and bench-supply rebuilds.

The internal architecture includes short-circuit protection, over-temperature shutdown, and output transistor safe-area compensation — so a misapplied load or thermal runaway can't take the part out without warning. Output voltage tolerance is typically 1%, tight enough for driving voltage-sensitive ASIC peripheral rails without re-tuning the divider.

When to Replace the ASPL317LDT-R

• Auxiliary rail dead or noisy on an ASIC PSU — LDO failed open or output capacitor degraded, replace and verify.
• Output voltage drift beyond the 1% tolerance — internal reference or trim drift, swap for a fresh part to restore accuracy.
• Visible burn or discoloration on the regulator package — thermal or transient damage, replace immediately.
• Short-circuit protection latched permanently — internal trip damaged the part after repeated faults, no recovery without replacement.
• Preventive PSU refurbishment — LDOs drift over years of thermal cycling, refresh alongside bulk capacitors during a rebuild.

ASPL317LDT-R Voltage Regulator Specifications

FAQ — ASPL317LDT-R

Q: Is the ASPL317LDT-R interchangeable with the LM317 or AMS1117?
A: Functionally similar — all three are 3-terminal positive LDOs in the same family lineage. The ASPL317LDT-R matches the LM317 footprint and pinout in its SMD form. Substituting between vendors typically works for low-current applications; verify dropout voltage and thermal envelope for your specific use case.

Q: How do I set the output voltage?
A: Standard 3-terminal adjustable LDO topology — a resistor divider between the ADJ pin and ground sets the output. Vout = 1.25V × (1 + R2/R1) + IADJ × R2. The 1.25V reference is the typical internal value; verify against the datasheet for production-tight designs.

Q: What's the maximum input voltage I can apply?
A: Input must stay below the part's absolute maximum rating and the dropout voltage must be maintained for regulation. For 35V output, allow at least 3V dropout headroom (38V minimum input typical).

Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com with your monthly volume. Reel and tube quantities are stocked.

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Repair shops stocking ASPL317LDT-R LDOs by the reel? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.