MP5515GU-Z

MP5515GU-Z is a high-efficiency, synchronous buck DC-DC converter IC from Monolithic Power Systems. It integrates the high-side and low-side MOSFETs in a compact GU/Z-QFN package and is aimed at generating low-voltage rails from a higher input in VRMs for CPUs, GPUs, ASICs, and telecom equipment. Features typically include adjustable output via external feedback resistors, enable/soft-start, power-good, and protections such as UVLO, OVP, OCP, and thermal shutdown. It uses current-mode control with PWM or PFM modes to maintain good efficiency across load ranges. Applications include core/Vcore and memory rails and other point-of-load supplies. Layout tips: place input/output capacitors close, keep feedback and inductor traces short, and ensure adequate heat sinking. For exact specs (Vin range, Vout, switching frequency, pinout), refer to the MP5515GU-Z datasheet and reference designs.

Here are typical features of MP5515GU-Z (consult the exact datasheet for precise values):
- Wide input range: supports DC inputs (commonly 4.5V to 42V)
- Synchronous buck regulator: integrated high-side and low-side MOSFETs
- Adjustable output: external feedback network to set Vout (common ranges from ~0.8V up)
- High efficiency: optimized for low power loss across load
- Output current capability: several amperes (typically 2–3A, depending on thermal conditions)
- Compact package: small footprint (GU-Z variant in a surface-mount package)
- Frequency and mode: fixed switching frequency with PWM/auto mode for efficiency (light-load optimization)
- Soft-start: controlled startup to limit inrush and output overshoot
- Protections: overcurrent/short-circuit, overtemperature, undervoltage lockout
- Enable/shutdown control: enables/disables regulator
- Remote sense/compensation options: improves output regulation accuracy
- Applications: suitable for industrial, automotive, and consumer power rails
Note: Please verify exact Vout range, Iout, switching frequency, and package details in the official datasheet for MP5515GU-Z.

QFN-16 (4x4 mm) surface-mount package.

- Pin count: 16 pins (QFN-16, 4x4 mm).
- Function: High‑efficiency synchronous buck regulator (step-down DC‑DC converter) with integrated MOSFETs. Pins include VIN, GND, SW (switch node), BST (bootstrap), EN, FB (feedback), PGOOD, and other control/diagnostic signals (DIM/ISET/IS, etc.).

Manufacturer: Monolithic Power Systems (MPS).
What kind of company: MPS is a fabless semiconductor company that designs and markets analog and mixed-signal integrated circuits, primarily power-management ICs such as DC-DC converters.

MP5515GU-Z is a high-efficiency, multi-channel synchronous buck regulator IC used for DC-DC power conversion. Typical applications include powering core voltage rails for CPUs/GPUs, memory, FPGA/ASIC platforms, and other high-current rails. Suitable for notebooks/desktops, servers, graphics cards, telecom and data-communication equipment, and industrial/embedded power supplies requiring compact VRMs with excellent efficiency.