Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| OutputConfiguration | Positive |
| OutputType | Adjustable |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | 5.5V |
| Voltage-Output(Min/Fixed) | 0.8V |
| Voltage-Output(Max) | 4.5V |
| VoltageDropout(Max) | 0.36V @ 1A |
| Current-Output | 1A |
| Current-Quiescent(Iq) | 500 µA |
| PSRR | 60dB ~ 50dB (100Hz ~ 10kHz) |
| ControlFeatures | Enable |
| ProtectionFeatures | Over Current, Over Temperature |
| OperatingTemperature | -40°C ~ 125°C |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) Exposed Pad |
Overview
Description
RT9187GSP is a Richtek Technologies DC-DC converter IC (a buck regulator) in a compact GSP package. It steps down a higher input voltage (e.g., a battery or power rail) to a stable, lower output for microcontrollers and peripherals in portable devices. The device typically integrates the switching transistor(s) and control circuitry, delivering high efficiency across loads, and supports an adjustable output via external feedback components along with protection features such as over-current, over-temperature, and undervoltage lockout. The GSP suffix denotes the specific packaging variant. Common applications include smartphones, wearables, IoT devices, and other battery-powered electronics. For exact specifications (input range, output voltage options, switching frequency, and pinout), please consult the official RT9187 datasheet.
Pinout
- Pin count: 8 pins (8-pin package)
- Function: High-efficiency DC-DC buck regulator (step-down regulator) for power management; converts input voltage to a lower output using an external feedback network (with enable/shutdown features).
- Function: High-efficiency DC-DC buck regulator (step-down regulator) for power management; converts input voltage to a lower output using an external feedback network (with enable/shutdown features).
Manufacturer
- Manufacturer: Richtek Technology Corp. (Richtek)
- About the company: A Taiwanese fabless semiconductor company that designs and markets analog and mixed-signal ICs, with a focus on power-management ICs for consumer and portable electronics.
- About the company: A Taiwanese fabless semiconductor company that designs and markets analog and mixed-signal ICs, with a focus on power-management ICs for consumer and portable electronics.
Application
RT9187GSP is a high-efficiency synchronous buck regulator. Common application areas include:
- Portable devices: smartphones, tablets, wearables, powering core rails from Li‑ion/PMICs.
- USB power interfaces: power banks, chargers, USB‑C PD applications.
- LED backlight and display rails in handhelds, notebooks, monitors.
- IoT and embedded systems: MCU/processor supply rails in battery-powered devices.
- Automotive/industrial: regulated rails from 12–24V to lower voltages.
- Consumer electronics: DC‑DC conversion for TVs, set‑top boxes, and similar gear.
- Portable devices: smartphones, tablets, wearables, powering core rails from Li‑ion/PMICs.
- USB power interfaces: power banks, chargers, USB‑C PD applications.
- LED backlight and display rails in handhelds, notebooks, monitors.
- IoT and embedded systems: MCU/processor supply rails in battery-powered devices.
- Automotive/industrial: regulated rails from 12–24V to lower voltages.
- Consumer electronics: DC‑DC conversion for TVs, set‑top boxes, and similar gear.
Package
It comes in an 8‑pin QFN package (GSP), typically 3×3 mm.
