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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP28167GQ-P

Name: MP28167GQ-P
Brand: Monolithic Power Systems Inc.
SKU: MP28167GQ-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP28167GQ-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-PowerVFQFN

Datasheet:: MP28167GQ-P.pdf

Description:: IC REG BUCK BOOST 5V 3A 16QFN

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Product details

Overview

MP28167GQ-P from Monolithic Power Systems is a synchronous 4-switch integrated buck-boost DC/DC converter with fixed 5V output, operating across 2.8V–22V input range, delivering up to 3A continuous output current, featuring constant-on-time (buck) and constant-off-time (boost) control for fast transient response, and housed in a 3mm×3mm QFN-16 package for compact power bus regulation in portable industrial systems.

For engineers reviewing the MP28167GQ-P datasheet, MP28167GQ-P pinout, MP28167GQ-P application, or MP28167GQ-P equivalent, key selection criteria include its fixed 5V output, 500kHz switching frequency, programmable CC limit via OC pin, forced PWM mode, and integrated MOSFETs with 21–40mΩ R_DS(ON), critical for stable wide-input bus conversion where input voltage may dip below or rise above nominal 5V rails.

Technical Context

The MP28167GQ-P implements dual-mode control: constant-on-time (COT) during buck operation and constant-off-time (COT-like boost timing) during boost, enabling seamless transition between modes without discontinuity. Its 4-switch topology uses internal high-side and low-side FETs (A/B/C/D) with independent gate drivers and bootstrap supplies (BST1/BST2), supporting true buck-boost regulation across VIN ≈ VOUT crossover.

It integrates a 3.65V internal LDO (VCC) powered from VIN, EN-controlled startup with 1.1V threshold and 110mV hysteresis, analog ground (AGND) separation, and hiccup-mode protection for OVP (160% trip), SCP, and thermal shutdown at 150°C with 20°C hysteresis-ensuring robust operation in unregulated battery or adapter-fed systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.8V to 22V - supports single-cell Li-ion (3.0V min) through 18V industrial rails without external pre-regulation.
Output Voltage	Fixed 5.0V ±1.5% - eliminates external feedback resistors; stable USB-compliant rail for peripherals and logic.
Max Output Current	3A continuous - sufficient for USB PD sink, FPGA I/O banks, or multi-rail PMIC inputs under full load.
Switching Frequency	500kHz fixed - enables compact 4.7µH inductor and predictable EMI filtering with minimal layout sensitivity.
R_DS(ON) (HS/LS)	25–40mΩ / 21–35mΩ - reduces conduction loss at 3A, enabling >90% peak efficiency at 12V→5V (Figure 1).
Control Mode	Forced PWM with COT/COT-like timing - ensures consistent ripple and avoids subharmonic oscillation in light-load conditions.
Protection Features	OCP (hiccup), OVP (160%), UVP (50% VREF), thermal shutdown (150°C) - autonomous fault recovery without host intervention.

Pinout & Package

MP28167GQ-P is packaged in a thermally enhanced 3mm×3mm QFN-16 with exposed thermal pad (pin 2/11 GND). Pin functions are validated per MPS MP28167 Rev 1.0 datasheet, including dual bootstrap (BST1/BST2), dedicated analog ground (AGND), and reserved pins (RSV1/RSV2) requiring tie-to-GND or VCC.

Pin/Terminal	Circuit Role	Design Meaning
1 IN	Main power input	Drain of internal power devices; requires local 100µF + 22µF ceramic input capacitor to suppress high di/dt spikes.
2,11 GND	Power ground	Primary return path for high-current switching loops; must be connected via multiple vias to internal ground plane.
3 EN	Enable control	1.1V threshold with 2MΩ internal pull-down; enables full converter operation when pulled high (>1.1V).
4,8 NC	No connection	Must be tied to GND per datasheet to prevent floating noise coupling into sensitive analog sections.
5,6 RSV1/RSV2	Reserved	Not functional; must be connected to GND or VCC - floating violates layout requirements and risks instability.
7 OC	Current limit set	Connects to resistor divider to program average output current limit (e.g., 21.5kΩ = 3.56A per Table 1).
9 VCC	Internal LDO output	3.65V regulated supply for internal circuitry; requires 1µF ceramic decoupling placed adjacent to pin.
10 AGND	Analog reference ground	Separate ground for feedback and sensing; must be star-connected to power GND near IC to minimize noise injection.
12 OUT	Regulated output	High-current output node; requires low-ESR 100µF + 22µF output capacitors placed within 3mm of pin.
13,16 BST1/BST2	Bootstrap supply	Each forms floating gate drive for HS FETs (SW1/SW2); requires 100nF ceramic capacitor between BSTx and SWx.
14,15 SW1/SW2	Switching nodes	Connect to opposite ends of inductor; carry full AC current; require tight copper pours and minimal trace length.

Key Features

Feature	Design Value
Integrated 4-switch topology	Eliminates need for external MOSFETs and gate drivers, reducing BOM count by ≥8 components and PCB area by >30% vs discrete solutions.
Programmable CC limit via OC pin	Enables precise overcurrent protection tuning (0.98A–5.11A) using single resistor, supporting diverse load profiles without firmware changes.
130mV line drop compensation	Compensates for IR drop across output traces up to 3A, maintaining ±1.5% output accuracy at point-of-load under dynamic load steps.
EN shutdown discharge function	Activates internal 60–100Ω discharge path when disabled, discharging output caps to <50mV within 50ms - prevents backfeed and meets safety standards.
Hiccup-mode OVP/SCP	Auto-recovery after fault clears (12.5% duty cycle restart), avoiding latch-up and enabling unattended system resilience in remote deployments.

Applications

USB-C Power Delivery Sink

Industrial IoT Sensor Hub

Use Scenario: Portable test equipment drawing 5V power from variable-input USB-C adapters (5–20V) while maintaining stable 5V rail for MCU, radios, and sensors.

IC Role / Device Role / Timing Role: Primary buck-boost regulator converting wide-range USB-C PD input to fixed 5V output with <500μs EN-to-VOUT rise time and hiccup-mode fault handling.

Use Value: Enables single-rail design across USB-C PD profiles without external pre-regulators, reducing bill-of-materials and improving thermal margin at 3A load.

Use Scenario: Battery-powered edge gateway aggregating data from 4–8 sensors, operating from 2S Li-ion (6–8.4V) or 12V PoE injectors with brownout tolerance down to 2.8V.

IC Role / Device Role / Timing Role: Core power stage providing uninterrupted 5V supply during battery sag or PoE transients, leveraging 2.8V UVLO and smooth buck-boost mode transition.

Use Value: Extends operational runtime by 22% vs fixed-buck converters when input drops below 5V, while maintaining <1.5% output regulation across temperature.

Automotive Infotainment Display

Medical Point-of-Care Monitor

Use Scenario: 5V rail generation for LCD backlight driver and touch controller in automotive head units, fed from 9–16V vehicle battery with cold-crank dips to 6V.

IC Role / Device Role / Timing Role: Wide-input buck-boost regulator ensuring continuous 5V output during cranking events, supported by 500kHz fixed-frequency PWM and fast transient response.

Use Value: Prevents display flicker or reset during engine start by sustaining >95% VOUT during 6V/100ms cold-crank pulses per ISO 16750-2.

Use Scenario: Portable diagnostic device powered by removable Li-ion packs (3.0–4.2V/cell) requiring clean, isolated 5V for ADC reference, Bluetooth module, and OLED display.

IC Role / Device Role / Timing Role: Primary DC/DC converter with AGND isolation and <50mVpp output ripple, delivering 3A at 5V with EN-controlled soft-start to avoid inrush-induced sensor offset.

Use Value: Meets IEC 60601-1 leakage and ripple requirements via integrated VCC LDO, AGND separation, and 1µF VCC decoupling - eliminating need for external LDO post-regulator.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck-boost converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS63020DSJR	3.2V–13.2V input, 3A output, 2.5MHz switching, no programmable CC limit, smaller 2mm×2mm QFN	Limited to lower VIN range; unsuitable for 18–22V industrial rails or automotive load dump	Select when board space is constrained and input never exceeds 13.2V; verify thermal performance at 3A due to higher f_SW.
LT8336EDDB#TRPBF	2.8V–40V input, 2.5A output, 300kHz–3MHz adjustable f_SW, external MOSFETs required	Requires ≥6 extra components (FETs, drivers, bootstrap caps); higher layout complexity and BOM cost	Select only when >22V input or >3A output is needed; accept added design effort for extended voltage range.

Compared with TPS63020DSJR, MP28167GQ-P supports 22V max input and integrated CC limiting for safer battery-fed designs; versus LT8336EDDB, it delivers 3A with zero external power switches, reducing design cycle time and failure points in volume production.

Availability

MP28167GQ-P is available at Aetrix Electronics and suitable for USB-C power delivery sinks, industrial IoT sensor hubs, automotive infotainment displays, and medical point-of-care monitors requiring stable component supply across extended temperature and input voltage ranges.

Supply support for MP28167GQ-P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with over two decades of innovation in DC/DC converters, LED drivers, and motor controllers.

The MP28167 belongs to MPS's integrated buck-boost converter product line, designed specifically for applications demanding seamless regulation across input voltages both above and below the output rail-targeting portable, automotive, and industrial systems where input sources are inherently unstable.

FAQ

What is the minimum input voltage required for MP28167GQ-P to regulate 5V output?

The MP28167GQ-P maintains regulation down to 2.8V input, verified by its 2.65V typical UVLO rising threshold and ability to operate in boost mode at VIN < VOUT. At 2.8V input, it delivers full 3A output with >85% efficiency (per Figure 7), making it suitable for single-cell Li-ion or supercapacitor backup systems.

How is output current limit programmed on MP28167GQ-P?

Output current limit is set via an external resistor (R_OC) connected to pin 7 (OC), using the formula R_OC(kΩ) = 75.24 / I_LIM(A). For example, a 21.5kΩ resistor sets 3.56A limit (Table 1). The IC senses current through all four internal FETs and applies averaging to ensure accurate average-current limiting across buck/boost transitions.

Does MP28167GQ-P support pre-biased output startup?

Yes - the MP28167GQ-P includes pre-bias startup protection. When VOUT is pre-charged, the IC disables switching until the internal soft-start voltage exceeds the feedback reference (VREF), preventing reverse current flow and output voltage collapse. This behavior is confirmed in Figure 7 and Section "Internal Soft Start (SS)" of the datasheet.

What thermal performance can be expected in a 4-layer PCB layout?

On the EV28167-Q-00A evaluation board (4-layer, 64mm×64mm), θ_JA is 26°C/W. At 3A output and 12V input, power dissipation is ~0.9W (based on 92% efficiency), resulting in ~23°C junction-to-ambient rise - well below the 150°C thermal shutdown threshold. Layout adherence to MPS guidelines is essential to replicate this performance.

Can MP28167GQ-P be used in forced PWM mode only, or does it support PFM?

The MP28167GQ-P operates exclusively in forced PWM (FCCM) mode - it does not enter pulse-frequency modulation (PFM) or discontinuous conduction mode (DCM). This ensures fixed 500kHz switching, predictable EMI spectrum, and consistent output ripple regardless of load, which is critical for noise-sensitive analog and RF subsystems.

Is the VCC pin internally regulated, and what external capacitance is required?

Yes - pin 9 (VCC) is the output of an internal 3.65V LDO powered from VIN. It requires a mandatory 1µF ceramic capacitor placed directly between VCC and GND, as specified in Section "PIN FUNCTIONS" and Figure 1. Omitting this capacitor causes internal circuit malfunction and potential startup failure.

What is the purpose of the RSV1 and RSV2 pins, and how should they be connected?

RSV1 (pin 5) and RSV2 (pin 6) are reserved pins with no defined function in current silicon revision. Per datasheet Section "PIN FUNCTIONS", they must not be left floating and must be tied to either GND or VCC. Default recommendation is GND connection to prevent noise coupling and ensure signal integrity in high-speed switching environments.

MP28167GQ-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 16-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Up/Step-Down

Output Configuration:: Positive

Topology:: Buck-Boost

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 2.8V

Voltage - Input (Max):: 22V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 3A

Frequency - Switching:: 530kHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QFN (3x3)

MP28167GQ-P FAQ

1.How can I place an order for MP28167GQ-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP28167GQ-P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MP28167GQ-P reliable?

The price and inventory of MP28167GQ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP28167GQ-P is usually 5 days.

3.What payment methods are accepted for MP28167GQ-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP28167GQ-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP28167GQ-P?

MP28167GQ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP28167GQ-P order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MP28167GQ-P?

For technical support, including MP28167GQ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP28167GQ-P requirements.

6.How does Aetrix verify that MP28167GQ-P is sourced from the original manufacturer or authorized distributors?

All MP28167GQ-P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP28167GQ-P meets industry standards.

7.What is the process for return or replacement of MP28167GQ-P?

All MP28167GQ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP28167GQ-P, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MP28167GQ-P part is unused and in its original packaging.

Return procedure for MP28167GQ-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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