Summary of 6A/6V BUCK CONVERTER WITH 16V INPUT OPERATES AT UP TO 2MHZ
The MPQ8626 is a high-efficiency, synchronous buck converter by Monolithic Power Systems. It delivers 6A output current with wide input voltage support and adjustable switching frequencies up to 2MHz. The device features adaptive constant-on-time control for fast transient response, comprehensive protection mechanisms including over-current and over-temperature safeguards, and a compact QFN-14 package suitable for telecom, server, and consumer electronics applications.
Parts used in the MPQ8626 Project:
- MPQ8626 IC
- External capacitor on TRK/REF
- External pull-up resistor for PGOOD signal
- Output capacitors (Zero ESR compatible)
- Input supply source (2.85V to 16V)
- Vcc bias (Internal or External 3.3V)
16V, 6A, High Efficiency, Synchronous, Step-Down Converter with Adjustable Current Limit.
Monolithic Power Systems (MPS) introduced the MPQ8626, a fully integrated, high-frequency, synchronous, buck converter. According to MPS, the MPQ8626 offers a very compact solution that achieves up to 6A of output current with excellent load and line regulation over a wide input supply range. The MPQ8626 operates at high efficiency over a wide output current load range.
Typical applications for the buck converter include telecom and networking systems, server, cloud-computing, storage, base stations, general purpose point-of-load (PoL), 12V distribution power systems, high-end TV, game consoles, and graphic Cards.
An internally compensated constant-on-time (COT) control that provides fast transient response and eases loop stabilization.
With MODE configuration, the operating frequency can be set to 600kHz, 1100kHz, or 2000kHz easily, allowing the MPQ8626 frequency to remain constant regardless of the input and output voltages.
The device has an internal 1.5ms timer that controls the output voltage start-up ramp. This internal timer can be increased by adding a capacitor on TRK/REF. An open-drain power good (PGOOD) signal indicates if the output is within its nominal voltage range. PGOOD is clamped at about 0.7V with an external pull-up voltage when the input supply fails to power the MPQ8626.
Full protection features include over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), and over-temperature protection (OTP).
Features Of MPQ8626
- Wide Input Voltage Range
- 2.85V to 16V with External 3.3V Vcc Bias
- 4V to 16V with Internal Vcc Bias or External 3.3V Vcc Bias
- 6A Output Current
- Programmable Accurate Current Limit Level
- Low RDS(ON) Integrated Power MOSFETs
- Proprietary Switching Loss Reduction Technique
- Adaptive Constant-On-Time (COT) for Ultrafast Transient Response
- Stable with Zero ESR Output Capacitor
- 0.5% Reference Voltage Over 0°C to +70°C Junction Temperature Range
- 1% Reference Voltage Over -40°C to +125°C Junction Temperature Range
- Selectable Forced CCM or Pulse-Skip Operation
- Excellent Load Regulation
- Output Voltage Tracking
- Output Voltage Discharge
- PGOOD Active Clamped at Low Level during Power Failure
- Programmable Soft-Start Time from 1ms and Up
- Pre-Bias Start-Up
- Selectable Switching Frequency from 600kHz, 1100kHz, and 2000kHz
- Non-Latch for OCP, OVP, UVP, OTP, and UVLO
- Output Adjustable from 0.6V to 0.9 x Vin Up to 6V Max
- Available in a QFN-14 (2mmx3mm) Package
Read more: 6A/6V BUCK CONVERTER WITH 16V INPUT OPERATES AT UP TO 2MHZ
- What is the maximum output current of the MPQ8626?
The device achieves up to 6A of output current. - How can the operating frequency be configured?
The frequency is set using MODE configuration to 600kHz, 1100kHz, or 2000kHz. - Does the MPQ8626 include over-voltage protection?
Yes, full protection features include over-voltage protection (OVP). - Can the soft-start time be adjusted?
Yes, the programmable soft-start time starts from 1ms and can be increased by adding a capacitor on TRK/REF. - What is the minimum input voltage range for the device?
The wide input voltage range starts at 2.85V with an external 3.3V Vcc bias. - Is the MPQ8626 stable with zero ESR output capacitors?
Yes, the device is stable with zero ESR output capacitors. - What type of control mechanism does the converter use?
It uses an internally compensated constant-on-time (COT) control. - In what package is the MPQ8626 available?
It is available in a QFN-14 (2mmx3mm) package.
