This article delves into the G5335QT2U, a high-efficiency synchronous buck converter from Global Mixed-mode Technology Inc. Engineered for precision voltage regulation and optimized power consumption, this compact component excels in space-constrained applications across various industries. We will use the G5335QT2U datasheet to explore its features, diverse applications, design considerations, and solve common problems to illustrate how it can power modern electronic devices with excellent efficiency.
Introduce
The G5335QT2U is a high-efficiency 10A synchronous buck converter produced by Global Mixed-mode Technology Inc. This component is designed for efficient voltage conversion and power management. It seems to be specifically tailored for applications that require precise and efficient control of power supply systems. The "QT" in the model number refers to the package type, which is QFN4X4-23. The "2" indicates a specific bonding code, and "U" signifies that it is supplied in Tape & Reel packaging.
G5335QT2U
This device aims to achieve high efficiency by eliminating the need for current-sense resistors typically used in such converters, thereby reducing power loss.
It can directly step down high-voltage batteries intended for maximum efficiency while being suitable for various applications including notebook computers and other low-voltage power supplies.
Features:
Ultra-High Efficiency
Integrated 8.5mΩ at VCC=5V N-Channel MOSFET for Low Side
Integrated 20mΩ at VCC=5V N-Channel MOSFET for High Side
No Current-Sense Resistor (Lossless ILIM)
Quasi-PWM with 100ns Load Step Response
1% VOUT Accuracy Over Line and Load
Programmable Switching Frequency
Adjustable Output Range from 0.8V
Input Voltage Range from 4.5V to 28V Adapter or Battery Input Range
Innovative Burst Switch
OVP & UVP
Over Temperature Protection (non-latch)
Adjustable Soft Start
Power-Good Indicator
Applications
The applications of the G5335QT2U would generally include any electronics that require efficient voltage regulation and power conversion within its operating specifications (input range, output range, current capacity). Here are some typical applications:
1. Portable Devices: It could be used in smartphones, tablets, portable gaming consoles or other handheld devices where battery life is critical.
2. Computing Systems: The device might find use in laptops/notebooks, desktops, servers or networking equipment as part of their internal power supply systems to regulate different voltages required by various subsystems like CPU, GPU or memory modules.
3. Power Supplies: For adjustable or fixed DC supply units that need an efficient conversion from one DC level to another.
4. Industrial Equipment: In machinery and industrial controls where reliable and efficient low-voltage supplies are needed for sensors and microcontrollers.
5. Automotive Applications: Modern vehicles have numerous electronic control units (ECUs), infotainment systems and LED lighting which all require stable low-voltage DC sources; this IC could be suitable for such uses given appropriate design considerations regarding automotive standards for temperature and vibration tolerance.
6. Telecommunications Infrastructure: Base stations and other telecommunications hardware often need regulated voltages from varying input sources; the G5335QT2U could serve well here due to its efficiency at converting wide-ranging inputs to stable outputs.
7. Consumer Electronics: Any consumer electronics like TVs, audio equipment or home automation systems may utilize such buck converters within their power management circuits.
Pin Configuration:
G5335QT2U is a 23-pin QFN (Quad Flat No-leads) package for high-efficiency synchronous buck converters, designed for power management applications. Here is a detailed breakdown of pin functionality and configuration:
Pin 1 (PGOOD): Power Good Output. It's an open-drain output that requires an external pull-up resistor. It indicates whether the output voltage is within the specified range.
Pin 2 (EN): Enable Pin. This pin turns the IC on or off. Pulling it above a certain threshold voltage turns the IC on, while pulling it below that threshold turns the IC off.
Pin 3 (PFM): Power Save Mode Selection Pin. This pin is used to enable or disable power save mode for improved efficiency at light loads.
Pin 4 (AGND): Analog Ground. This pin is the ground reference for the control circuitry of the IC.
Pin 5 (FB): Feedback Pin. This pin is connected to a voltage divider from the output to set the output voltage of the converter.
Pin 6 (TON): On-Time Control Pin. It's used to set the on-time of the high-side MOSFET, thus indirectly controlling the switching frequency.
Pin 7 (NC): No Connection. This pin is not internally connected and should be left floating or can be used for PCB heat spreading.
Pin 8-11 (V+): Input Power Supply Pins. These pins are connected to the input voltage supply for the converter.
Pin 12-14 (PGND): Power Ground. These are the ground return paths for the high and low side MOSFETs.
Pin 15-17 (LX): Switch Node. These pins are connected to the inductor and are the switching nodes of the internal MOSFETs.
Pin 18 (LX): Switch Node.
Pin 19 (BST): Bootstrap Pin. This pin provides the drive voltage for the high-side MOSFET.
Pin 20 (VCC): Bias Supply Pin. This pin powers the internal control circuitry.
Pin 21 (V+): Input Power Supply Pin.
Pin 22 (SS): Soft-Start Control Pin. This pin controls the start-up timing to prevent inrush current.
Pin 23 (SS): Soft-Start Control Pin.
Datasheet PDF
Download datasheets and manufacturer documentation for G5335QT2U.
G5335QT2U Datasheet