component

L4979D013TR

Public Unreviewed

by Ray

STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SO-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmicl4979d013tr
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

L4979D013TR

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SO-8

L4979D013TR from STMicroelectronics, in a SO-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 EN input Enable input. When driven high, the regulator, watchdog, and reset blocks are operating. When driven low, they are shut down (quiescent current drops to ~6 µA typ). Absolute max input voltage -0.3 V to 40 V.
2 GND power_in Ground reference for the device.
3 RES output Reset output (open-drain). Pulled low when the regulated output voltage drops below the internal Vo_th threshold or when the watchdog input (WI) frequency is too low. Requires external pull-up (typical Rext = 5 kΩ to Vo). Vres_l ≤ 0.4 V; leakage ≤ 1 µA at Vres = 5 V.
4 VCR passive Reset timing adjust. A capacitor connected between VCR and GND sets the reset delay time (t_rd). Absolute max -0.3 V to Vo+0.3 V.
5 VCW passive Watchdog timer adjust. A capacitor connected between VCW and GND sets the time response of the watchdog monitor. Absolute max -0.3 V to Vo+0.3 V.
6 WI input Watchdog input. Monitors an external clock signal from the microprocessor; if the input frequency is too low, the Reset (RES) output is activated. Absolute max -0.3 V to Vo+0.3 V.
7 VO power_out Voltage regulator output. Nominal 5.00 V (±2%, 4.90-5.10 V) at 1-150 mA. Requires an external output capacitor greater than 100 nF for regulator stability. Output current is internally limited (short-circuit typ 280 mA).
8 VS power_in Supply voltage input. Operating DC range 5.6 V to 31 V; absolute max 40 V. Requires a supply capacitor (e.g. 200 nF) close to the pin for regulator stability. Dropout voltage less than 0.5 V at 150 mA.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SO-8
Category PMIC
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • L4979D013TR
  • L4979MD
  • L4979MD013TR

CAD (KiCad official)

  • Symbol: L4979D013TR
  • Footprint: Package_SO:TI_SO-PowerPAD-8
  • 3D model: SO-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: STMicroelectronics datasheet (22 pp, sha256 c0447245d655a65e, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF