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

Monolithic Power Systems Inc. MP28167GQ-A-Z

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

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Part No.:: MP28167GQ-A-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-PowerVFQFN

Datasheet:: MP28167GQ-A-Z.pdf

Description:: IC REG BUCK BOOST ADJ 3A 16QFN

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Product details

Overview

MP28167GQ-A-Z from Monolithic Power Systems is a synchronous, four-switch integrated buck-boost DC/DC converter supporting 2.8V–22V input and regulating output from 1V to 20.47V with up to 3A continuous output current. It features I²C-configurable reference voltage (0.08V–1.637V), 500kHz/750kHz selectable switching frequency, and integrated MOSFETs with R_DS(ON) as low as 21mΩ (LS) and 25mΩ (HS), enabling USB PD sourcing port designs.

For engineers reviewing the MP28167GQ-A-Z datasheet, MP28167GQ-A-Z pinout, MP28167GQ-A-Z application, or MP28167GQ-A-Z equivalent, key selection criteria include its COT/COFF control architecture for fast transient response, I²C-adjustable constant-current limit, hiccup-mode OVP/SCP protection, and QFN-16 (3mm×3mm) thermal performance validated to 125°C junction temperature.

Technical Context

The MP28167GQ-A-Z implements dual-mode control: constant-on-time (COT) in buck mode and constant-off-time (COFF) in boost mode, ensuring smooth transitions across buck-boost boundary regions without discontinuity. Its four internal MOSFETs (A/B/C/D) are driven by independent high-side and low-side drivers with bootstrap supplies on BST1/BST2 pins.

Feedback regulation uses a precision 1.000V ±1% reference (V_FB) referenced to AGND, with external resistor divider connected to FB pin; output voltage scaling and line-drop compensation are fully I²C-programmable via OTP memory. The ALT pin provides fault-alert signaling with open-drain logic-low assertion during OVP, SCP, or thermal warning events.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.8V to 22V - supports wide-input industrial, automotive, and USB PD bus rails without pre-regulation.
Output Voltage Range	1.000V to 20.47V - programmable via I²C with 0.8mV resolution, enabling precise USB PD profile compliance.
Max Output Current	3A continuous - sustained at V_OUT = 5V with 4.7µH inductor and forced PWM mode per typical efficiency curves.
Switching Frequency	500kHz or 750kHz - selectable via I²C; higher frequency enables smaller magnetics but increases switching loss.
R_DS(ON) (HS/LS)	25mΩ / 21mΩ - low conduction loss enables >90% peak efficiency at 12V_IN/5V_OUT/3A load.
Protection Features	OVP (150–170% V_REF), SCP (hiccup), UVP (45–55% V_REF), thermal shutdown (150°C), and soft-start - all configurable via I²C.
Interface	I²C slave (up to 3.4MHz) with ALT alert pin - enables real-time telemetry, dynamic reconfiguration, and fault logging in host systems.

Pinout & Package

MP28167GQ-A-Z is housed in a thermally enhanced QFN-16 package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by dot; top marking includes "BKN" product code, year code "Y", and lot number "LLL".

Pin/Terminal	Circuit Role	Design Meaning
1 IN	Main power input	Drain of internal HS-FETs; requires local 100µF+ ceramic input capacitor placed adjacent to pin.
2,11 GND	Power ground	Primary return path for high-current loops; must be connected to large copper pour with multiple vias.
3 EN	Enable control	Active-high logic input with 2MΩ internal pull-down; rising threshold 1.10V ensures robust noise immunity.
4 ALT	Fault alert output	Open-drain signal pulled low during OVP, SCP, or thermal warning; requires external pull-up to V_CC.
5 SCL / 6 SDA	I²C interface	Supports standard/fast-mode I²C (400kHz–3.4MHz); unused pins must be pulled up to V_CC (3.65V).
7 OC	Constant-current limit set	Analog input for external CC programming; default value set by internal sensing MOSFET and I²C register.
8 FB	Voltage feedback	Connects to resistor divider tap; 1.000V ±1% reference enables accurate output regulation across temperature.
9 V_CC	Internal LDO output	3.65V ±5% regulated supply for gate drivers; decoupled with 1µF ceramic capacitor to GND.
10 AGND	Analog ground	Separate ground for FB, OC, and reference circuits; must be tied to GND at single point near IC.
12 OUT	Power output	Source of regulated output; requires low-ESR ceramic output capacitors (22µF ×5 + 100µF) placed close to pin.
13,16 BST1/BST2	Bootstrap supplies	Each connects 0.1µF capacitor to SW1/SW2 respectively; enables high-side NMOS gate drive above V_IN.
14,15 SW1/SW2	Switching nodes	Connect to opposite ends of power inductor; high di/dt paths require short, wide traces and ground shielding.

Key Features

Feature	Design Value
I²C-configurable V_REF	0.08V–1.637V range with 0.8mV step enables fine-grained USB PD voltage profile tuning without hardware change.
Auto PFM/PWM mode	Dynamic switching mode selection improves light-load efficiency while maintaining tight regulation under full load.
Configurable soft-start	I²C-adjustable ramp time (default 3.5ms) prevents inrush current and stabilizes V_OUT during power-up.
Integrated MOSFETs	Four matched 25mΩ/21mΩ switches eliminate external FETs and gate drivers, reducing BOM count and layout complexity.
Hiccup-mode protection	OVP and SCP enter hiccup mode (repeated restart attempts) rather than latch-off, enabling self-recovery after fault removal.

Applications

USB PD Sourcing Port

Buck-Boost Bus Supply

Use Scenario: Portable power bank delivering 5V/9V/15V/20V profiles to laptops and smartphones via USB-C.

IC Role / Device Role / Timing Role: Primary buck-boost regulator controlling V_OUT and I_OUT in real time via I²C commands from PD controller.

Use Value: Eliminates need for discrete buck + boost stages; achieves >90% efficiency across full VIN/VOUT operating range.

Use Scenario: Industrial IoT gateway requiring stable 12V rail from variable 5–24V battery or PoE input.

IC Role / Device Role / Timing Role: Single-stage wide-input DC/DC converter maintaining regulated output despite input sag or surge.

Use Value: Reduces component count by 40% vs. dual-converter solution; thermal design validated to 125°C ambient.

Automotive Infotainment

Medical Portable Monitor

Use Scenario: In-vehicle display system powered from 9–16V battery with cold-crank tolerance down to 6V.

IC Role / Device Role / Timing Role: Input-wide buck-boost regulator supplying 5V/3.3V rails to SoC and peripherals during engine start.

Use Value: Maintains regulation during 6V input dips; hiccup-mode SCP protects against shorted display cables.

Use Scenario: Battery-powered patient monitor needing 3.3V/5V rails from 2-cell Li-ion (6–8.4V) or USB input.

IC Role / Device Role / Timing Role: Efficient power stage supporting dynamic load steps (e.g., ECG acquisition bursts) with <100µs recovery.

Use Value: COT/COFF control delivers <±1% load transient deviation; I²C telemetry enables battery health monitoring.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP28164GQ-Z	Lower 2.5A output current rating; no I²C interface; fixed 1V reference; lacks ALT alert pin.	Suitable for cost-sensitive, non-PD applications where voltage flexibility and telemetry are unnecessary.	Select when USB PD compliance and real-time configuration are not required; saves BOM cost but sacrifices design adaptability.
TPS63802DLAR	2.5A max output; 2.5V–12V input; no I²C; fixed-frequency PWM only; no hiccup-mode OVP.	Targeted at space-constrained consumer electronics with narrow input range and simpler protection needs.	Choose for compact footprint (2mm×2mm WSON) and lower quiescent current (12µA), but verify thermal margin at 3A loads.

Compared with MP28167GQ-A-Z, MP28164GQ-Z trades configurability for cost reduction, while TPS63802DLAR offers smaller size but narrower input range and no fault telemetry-making MP28167GQ-A-Z optimal for USB PD and industrial applications demanding full I²C control and robust protection.

Availability

MP28167GQ-A-Z is available at Aetrix Electronics and suitable for USB PD sourcing ports, industrial bus supplies, automotive infotainment systems, and medical portable monitors requiring stable component supply across extended temperature and input voltage ranges.

Supply support for MP28167GQ-A-Z 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 expertise in DC/DC conversion, motor drivers, and LED lighting solutions.

The MP28167 series belongs to MPS's USB PD-compliant buck-boost product line, designed specifically for single-chip, wide-input, programmable power delivery in portable and embedded systems where space, efficiency, and protocol flexibility are critical.

FAQ

What is the minimum recommended input voltage for reliable startup?

The MP28167GQ-A-Z has a guaranteed UVLO rising threshold of 2.65V (typical), with 160mV hysteresis. Startup is reliable down to 2.8V input per datasheet specifications; operation below this risks intermittent enablement due to UVLO dropout. For cold-crank automotive use, ensure input stays ≥2.8V during cranking transients.

Can the FB pin be used for direct analog voltage setting without a resistor divider?

No-the FB pin is a high-impedance input designed exclusively for connection to the center tap of an external resistor divider between V_OUT and GND. Its 10nA bias current and 1.000V reference require the divider to set V_OUT = 1.000V × (1 + R1/R2). Direct voltage injection violates the internal error amplifier topology and causes regulation failure.

How does the I²C-configurable line drop compensation work?

Line drop compensation adjusts the FB reference voltage upward in proportion to output current to counteract resistive losses in PCB traces or cables. It is programmed via I²C register 0x0A (LDC_GAIN) and 0x0B (LDC_OFFSET), enabling precise remote-sense-like regulation without additional pins or components.

Is the ALT pin active during thermal warning or only at shutdown?

The ALT pin asserts low during both thermal warning (T_J ≥ 130°C) and thermal shutdown (T_J ≥ 150°C), as specified in the Electrical Characteristics table. This allows host firmware to initiate cooling or load reduction before shutdown occurs, improving system reliability.

What is the maximum supported I²C clock frequency, and are pull-up resistors required?

The MP28167GQ-A-Z supports I²C clock frequencies up to 3.4MHz (fast-mode plus). External 4.7kΩ pull-up resistors to V_CC (3.65V) are mandatory on both SCL and SDA lines; internal weak pull-ups are not provided, and floating lines cause communication failure.

Does the device support automatic transition between buck, boost, and buck-boost modes?

Yes-the MP28167GQ-A-Z autonomously transitions between buck, boost, and buck-boost modes based on real-time VIN/VOUT ratio and inductor current waveform analysis. No external mode control is needed; the seamless transition is handled entirely by the internal COT/COFF control logic.

What is the thermal resistance (θ_JA) for the QFN-16 package in standard layout?

Measured on a 4-layer JEDEC-standard board (JESD51-7), θ_JA is 50°C/W. On the MP28167 evaluation board (EV28167-A-Q-00A, 64mm×64mm, 4-layer), θ_JA is 26°C/W. These values assume proper thermal pad soldering and copper area; actual performance depends on PCB layout and airflow.

MP28167GQ-A-Z 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:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2.8V

Voltage - Input (Max):: 22V

Voltage - Output (Min/Fixed):: 1V

Voltage - Output (Max):: 20.47V

Current - Output:: 3A

Frequency - Switching:: 520kHz, 750kHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

MP28167GQ-A-Z FAQ

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

Please submit a Request for Quotation (RFQ) for MP28167GQ-A-Z 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-A-Z reliable?

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

3.What payment methods are accepted for MP28167GQ-A-Z?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP28167GQ-A-Z?

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

Once your MP28167GQ-A-Z 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-A-Z?

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

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

All MP28167GQ-A-Z 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-A-Z meets industry standards.

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

All MP28167GQ-A-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP28167GQ-A-Z, 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-A-Z part is unused and in its original packaging.

Return procedure for MP28167GQ-A-Z:

1.Submit a request within 90 days.

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

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