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AZ1117C low dropout regulator connection guide

AZ1117C low dropout regulator (SOT-89 R2) connection guide. Wire the regulator for about 9 V.

SOT-223 H 4 contacts
SOT-223 H2 4 contacts
SOT-89 R 4 contacts

SOT-89 R2

4 contacts Current package
TO-252 D 4 contacts

Diodes Incorporated · Order prefix AZ1117CR2.

Wire the regulator for about 9 V

Required

Check the package code and the tab net before soldering. Bypass the input and output close to the part. Use at least 10 µF effective output capacitance and less than 20 Ω ESR.

  • Input
    • CIN.1
    • Current-limited 11 V supply
  • Output
    • →
    • COUT.1
    • Meter positive
    • R1.1
  • Ground
    • CIN.2
    • COUT.2
    • Supply return
    • Meter common
    • R2.2
  • Feedback
    • →
    • R1.2
    • R2.1
CIN 10 µF between Input and GroundInputCIN 10 µFGround
COUT 22 µF between Output and GroundOutputCOUT 22 µFGround
R1 124 Ω between Output and FeedbackOutputR1 124 ΩFeedback
R2 768 Ω between Feedback and GroundFeedbackR2 768 ΩGround

Bench checks

  • Verify pin and tab continuity with power off. Do not let a heatsink short the tab to another net.
  • Measure about 1.25 V across R1 and about 9 V from OUT to ground. The divider draws roughly 10 mA, above the 5 mA maximum minimum-load specification.

Diodes DS36676 Rev. 5-2, p. 3, Typical Applications Circuit and note 4.

SOT-89 R2 wiring map

External wiring example · Wire the regulator for about 9 V

Highlighted contacts are used in the required step or selected circuit. Select a contact to highlight its wiring nets.

SOT-89 R2
Marked side, tab above the body and pins 1–3 below, left to right.
Selected pin details

1 · ADJ

Input · Control

Feedback pin. The regulator maintains about 1.25 V from OUT to ADJ.

Diodes DS36676 Rev. 5-2, p. 2

Electrical limits · Pin in the reference

Models and documents

The second line 816TI5 fits the SOT-223 YWWAXX traceability format (year digit 8, work week 16, assembly code T, batch suffix I5). The format does not identify the decade. The D variants share their electrical assignment, but the short center lead and package drawing options require checking the land pattern.

AZ1117CR2-ADJTRG1
Adjustable output. Marking: G42O.
AZ1117CR2-1.2TRG1
1.2 V fixed output. Marking: G43M.
AZ1117CR2-1.5TRG1
1.5 V fixed output. Marking: G43N.
AZ1117CR2-1.8TRG1
1.8 V fixed output. Marking: G43O.
AZ1117CR2-2.5TRG1
2.5 V fixed output. Marking: G44O.
AZ1117CR2-3.3TRG1
3.3 V fixed output. Marking: G43P.
AZ1117CR2-5.0TRG1
5.0 V fixed output. Marking: G33N.
  • Datasheet for AZ1117C· DS36676 Rev. 5-2; see pp. 2–4 for wiring and pp. 11–12 for order and marking codes.
  • Source register· Original document URLs, revisions and file checksums.