# TL1451ACDR

**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-16

TL1451ACDR from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CT | passive | Timing capacitor terminal for the on-chip adjustable oscillator, which runs at 500 kHz maximum. |
| 2 | RT | passive | Timing resistor terminal for the on-chip adjustable oscillator, which is set by terminating RT and CT. |
| 3 | 1IN+ | input | Non-inverting input of error amplifier 1, with a common-mode voltage range of 1.04 V to 1.45 V. |
| 4 | 1IN- | input | Inverting input of error amplifier 1, with a common-mode voltage range of 1.04 V to 1.45 V. |
| 5 | 1FEEDBACK | output | Feedback terminal of error amplifier 1 for PWM control loop compensation. |
| 6 | 1DTC | input | Dead-time control input of comparator 1, which can set 0% to 100% dead time. |
| 7 | 1OUT | output | Uncommitted common-emitter output transistor of controller 1. |
| 8 | GND | power_in | Ground. |
| 9 | VCC | power_in | Supply voltage input; undervoltage lockout keeps the outputs off until the internal circuitry is operational. |
| 10 | 2OUT | output | Uncommitted common-emitter output transistor of controller 2. |
| 11 | 2DTC | input | Dead-time control input of comparator 2, which can set 0% to 100% dead time. |
| 12 | 2FEEDBACK | output | Feedback terminal of error amplifier 2 for PWM control loop compensation. |
| 13 | 2IN- | input | Inverting input of error amplifier 2, with a common-mode voltage range of 1.04 V to 1.45 V. |
| 14 | 2IN+ | input | Non-inverting input of error amplifier 2, with a common-mode voltage range of 1.04 V to 1.45 V. |
| 15 | SCP | passive | Short-circuit protection terminal for the internal short-circuit protection circuit. |
| 16 | REF | power_out | Output of the internal regulator providing a stable 2.5-V reference supply. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `TL1451ACDR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `tl1451acdr-etched.step` / `tl1451acdr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl1451acdr.step` / `tl1451acdr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tl1451a) (38 pp, sha256 `2ff4a14b96f1efec`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/tl1451acdr-datasheet.pdf)