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RT9179GB

Public Made by Adom

by adom

Richtek Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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RT9179GB

Richtek Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

RT9179GB from Richtek Tech, in a SOT-23-5. 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 VIN power_in Power input voltage. Operating range 3V to 5.5V (absolute max 6V). Requires ~1uF decoupling capacitor placed less than 1cm from the pin.
2 GND power_in Ground reference. Quiescent (ground pin) current is typically 150uA when enabled.
3 EN input Chip enable, active high. VIH >= 2.0V enables the regulator; VIL <= 0.4V places the part in shutdown (<1uA standby). Enable input range 0V to 5.5V; EN input current typically <10nA.
4 ADJ input Feedback / output-voltage adjust input. Connect to the midpoint of an external resistor divider from VOUT to GND; VOUT = 1.175 x (1 + R1/R2). Reference voltage 1.175V, ADJ pin current <= 10nA. Recommended resistor values in the hundreds of ohms to hundreds of kilohms range.
5 VOUT power_out Regulated output voltage. Adjustable from 1.175V to 4.5V, capable of delivering up to 300mA. Requires a 1uF to 4.7uF ceramic (X7R/X5R) output capacitor with 10mOhm to 50mOhm ESR for loop stability.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package SOT-23-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • RT9179GB
  • RT9179GBPB

CAD (KiCad official)

  • Symbol: RT9179GB
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Richtek Tech datasheet (10 pp, sha256 b662bbaa0b94e6db, retrieved 2026-08-17, tier: lcsc)
  • 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