component

RT9198-28GBR

Public Made by Adom

by adom

Richtek Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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RT9198-28GBR

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

RT9198-28GBR from Richtek Tech, in a SOT-23-5. 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 VIN power_in Input voltage, operating range 2.5V to 5.5V (6V absolute maximum), bypassed with a 1uF ceramic capacitor placed within 0.5 inch of the pin.
2 GND power_in Ground pin, returned to a clean analog ground.
3 EN input Chip enable, active high for RT9198 (on above 1.2V, shutdown below 0.4V); the pin is high impedance, so use a 100k pull-down to GND when the control signal is floating.
4 NC unconnected No internal connection.
5 VOUT power_out Regulated output voltage (2.8V for the -28 option) delivering up to 300mA, with a 1uF or larger ceramic output capacitor placed within 0.5 inch of the pin.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage Accuracy VOUT -2 2 % IOUT = 1mA 4
Current Limit ILIM 360 400 mA RLOAD = 1 4
Quiescent Current IQ 90 130 μA RT9198, VEN ≧ 1.2V, IOUT = 0mA 4
Quiescent Current IQ 170 200 μA IOUT = 200mA 4
Dropout Voltage VDROP 220 330 mV IOUT = 300mA 4
Line Regulation VLINE 0.3 % VIN = (VOUT + 1V) to 5.5V, IOUT = 1mA 4
Load Regulation VLOAD 0.6 % 1mA < IOUT < 300mA 4
Shutdown Current ISHDN 0.01 1 μA RT9198, VEN = GND, Shutdown 4
EN Input Bias Current IIBEN 0 100 nA VEN = GND or VIN 4
Logic-Low Voltage VIL 0.4 V RT9198, VIN = 3V to 5.5V, Shutdown 5
Logic-High Voltage VIH 1.2 V RT9198, VIN = 3V to 5.5V, Enable 5
Power Supply Rejection Rate PSRR 60 dB f = 100Hz 5
Power Supply Rejection Rate PSRR 30 dB f = 10kHz, COUT = 1μF, IOUT = 100mA 5
Thermal Shutdown Temperature TSD 165 °C 5
Thermal Shutdown Temperature Hysteresis TSD 30 °C 5
Supply Input Voltage VIN 2.5 5.5 V 4
EN Input Voltage VEN 0 5.5 V 4
Junction Temperature Range TJ -40 125 °C 4
Ambient Temperature Range TA -40 85 °C 4
Supply Input Voltage VIN 6 V 4
Power Dissipation (SOT-23-5) PD 400 mW TA = 25°C 4
Junction Temperature TJ 150 °C 4
Lead Temperature (Soldering) 260 °C Soldering, 10 sec. 4
Storage Temperature Range TSTG -65 150 °C 4
ESD Susceptibility HBM 2 kV Human Body Model 4
ESD Susceptibility MM 200 V Machine Model 4
Package Thermal Resistance Junction-to-Ambient θJA 250 °C/W SOT-23-5, JEDEC 51-3 single-layer board 4
Package Thermal Resistance Junction-to-Case θJC 135 °C/W SOT-23-5, measured at exposed pad 4

CAD (KiCad official)

  • Symbol: RT9198-28GBR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: rt9198-28gbr-etched.step / rt9198-28gbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rt9198-28gbr.step / rt9198-28gbr.glb are the bare package body.

Provenance

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

  • Datasheet: Richtek Tech datasheet (18 pp, sha256 802cc05566dfdebd, retrieved 2026-10-21, 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