Spark Logic

AP2114HA fixed voltage regulator connection guide

AP2114HA fixed voltage regulator SOT-223 (HA) wiring guide with power, signal assignments, and bench checks.

SOT-223 (HA)

4 contacts Current package

Diodes Incorporated / BCD · Three lead positions and a connected metal tab.

1.5 V fixed output.

Power the fixed regulator

Required

Check the tab connection before attaching the board or heatsink. Measure the output against the device ground with a high-impedance meter.

CIN 4.7 µF ceramic between Input rail and GroundInput railCIN 4.7 µF ceramicGround
COUT 4.7 µF ceramic between Regulated rail and GroundRegulated railCOUT 4.7 µF ceramicGround

Bench checks

  • Confirm the input is present at VIN and the output is near the selected fixed voltage.

Diodes / BCD AP2114 Rev. 2.2, Electrical Characteristics and Figure 2. The bench capacitors follow the electrical test conditions.

Connection scenarios

Check regulation under a small load

Switch the supply off, add a 1 kΩ resistive load from VOUT to GND, then reapply power.

  • Input rail
    • VIN (1)
    • Current-limited 5 V supply
    • CIN.1
  • Ground
  • Regulated rail
CIN 4.7 µF ceramic between Input rail and GroundInput railCIN 4.7 µF ceramicGround
COUT 4.7 µF ceramic between Regulated rail and GroundRegulated railCOUT 4.7 µF ceramicGround
RL 1 kΩ between Regulated rail and GroundRegulated railRL 1 kΩGround

Bench checks

  • Compare loaded and unloaded output readings. The nominal current in milliamperes is the output voltage divided by 1 kΩ.
  • Check VIN at the part and probe VOUT for oscillation if the output moves unexpectedly.

Diodes / BCD AP2114 Rev. 2.2, Electrical Characteristics and Figure 2. The bench capacitors follow the electrical test conditions. The 1 kΩ load is a fixture choice.

SOT-223 (HA) wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

SOT-223 (HA)
View from the marked face, with the tab above the body and leads 1–3 below from left to right. Scroll the map to reach all contacts.
Selected pin details

2 · GND

Return · Ground

Supply and load return for the fixed-voltage regulator.

Diodes / BCD AP2114 Rev. 2.2, Figure 2

Electrical limits · Pin in the reference

Models and documents

All five HA output codes share the same pinout. The AP2114H uses a VOUT tab and a different pin order.

AP2114HA-1.2TRG1
1.2 V fixed output.
AP2114HA-1.5TRG1
1.5 V fixed output.
AP2114HA-1.8TRG1
1.8 V fixed output.
AP2114HA-2.5TRG1
2.5 V fixed output.
AP2114HA-3.3TRG1
3.3 V fixed output.
  • Diodes / BCD AP2114 Rev. 2.2· Figure 2, ordering information, operating limits and electrical test conditions.
  • Source register· Document revisions, applicable order codes, consulted sections and available file checksums.