TPS566231RQFR

TPS566231RQFR is TI’s Simple Switcher buck (step-down) DC-DC regulator. It integrates a high‑side switch and control circuitry to generate a regulated low-voltage output from a higher input, suitable for point‑of‑load power in portable, automotive, and industrial applications. The RQFR suffix indicates a RoHS‑compliant, QFN/exposed‑pad package variant.
Key points:
- Buck regulator with protective features (enable, soft-start, overcurrent/thermal shutdown).
- Wide input range and fixed or adjustable output (via feedback network) options.
- High efficiency with minimal external parts (inductor, input/output capacitors).
- Typical use: generate rails for microprocessors, memory, FPGAs, and other digital ICs.
How to use (high level):
- Connect VIN and GND, set VOUT via feedback (or use fixed version), and drive EN high to enable.
- Add the recommended inductor and capacitors per the datasheet and layout guidelines.
For exact electrical specs (input range, output voltage, current capability, switching frequency) and package details, refer to the TPS566231 datasheet on TI’s product page.

TPS566231RQFR features (typical for TI TPS566231 family):
- 1.8 V to 5.5 V input voltage range
- Step-down (buck) regulator with integrated high-side switch
- Output voltage configurable via external feedback (fixed variants available)
- Up to about 250 mA output current
- High efficiency; suitable for battery-powered applications
- Enable/shutdown pin for control
- Soft-start to limit inrush
- Overcurrent/short-circuit protection
- Thermal shutdown protection
- Stable with ceramic output capacitors
- Small 8-pin VQFN/SO package; RoHS-compliant (lead-free) with tape-and-reel options (RQFR)
Note: Exact output voltage options and package details depend on the specific variant; refer to the official datasheet for precise specs.

TPS566231RQFR is an 8-pin QFN (RQFN-8, about 3x3 mm) buck regulator (TI Simple Switcher). Pin count: 8.
Main pin functions (typical):
- VIN: input supply
- GND: ground
- LX (SW): switching node to the external inductor
- BST: bootstrap for high-side gate drive
- FB: output voltage feedback
- EN/UVLO: enable and undervoltage lockout
- PGOOD/SS: power-good or soft-start/status signal
- NC: no-connect (unused pin in some variants)
Exposed pad (under package) is typically tied to GND.

- Manufacturer: Texas Instruments (TI).
- What kind of company: American multinational semiconductor company that designs and manufactures analog and embedded-processing integrated circuits (including power-management ICs), serving automotive, industrial, consumer electronics, and communications markets. Headquartered in Dallas, Texas; one of the world’s largest semiconductor companies.

TPS566231RQFR is a compact, high-efficiency buck regulator ideal for portable/battery-powered electronics. Applications include: point-of-load regulators for microcontrollers, DSPs and CPUs; wireless modules (Bluetooth, Wi‑Fi, Zigbee), sensors and GPS; wearables and handheld devices; small consumer electronics and IoT gateways; and other systems requiring a compact, low-quiescent-power power rail from a wide input range. The device is suitable where space, efficiency, and fast transient response matter.

VQFN-16 (3x3 mm) package with an exposed pad (EP).