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Monolithic Power Systems Inc. MP28164GD-Z
- Part No.:
- MP28164GD-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 11-VFQFN
- Datasheet:
-
MP28164GD-Z.pdf
- Description:
- IC REG BUCK BOOST ADJ 4.2A 11QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
MP28164GD-Z from Monolithic Power Systems is a high-efficiency, single-inductor buck-boost DC/DC converter with integrated 4.2A switches, operating from 1.2V to 5.5V input and delivering adjustable 1.5V–5V output. It uses current-mode control with fixed 2MHz PWM or pulse-skipping mode, supports load disconnect during shutdown, and features power-good indication and hiccup-mode short-circuit protection. It powers portable devices requiring seamless voltage regulation across battery discharge curves.
For engineers reviewing the MP28164GD-Z datasheet, MP28164GD-Z pinout, MP28164GD-Z application, or MP28164GD-Z equivalent, this page delivers verified technical context, validated pin functions, real-world load capability (3.3V/2A from 2.5–5.5V input), thermal shutdown behavior (160°C), and design-meaningful specifications - all extracted from Monolithic Power's official Rev. 1.0 datasheet.
Technical Context
The MP28164GD-Z implements a four-switch buck-boost topology with dual PWM control paths: VC-Buck governs SWA/SWB in buck mode (VIN > VOUT), while VC-Boost-derived via level shift-controls SWC/SWD in boost mode (VIN < VOUT). In buck-boost transition (VIN ≈ VOUT), both legs operate interleaved with synchronized ramp offset to maintain regulation.
Its MODE/SYNC pin selects between automatic PSM/PWM mode switching (low) or forced fixed-frequency PWM (high), enabling ripple-sensitive or efficiency-optimized operation. Internal soft-start clamps VREF during startup and hiccup recovery, limiting inrush and preventing overshoot when load changes abruptly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.2V–5.5V: Supports full battery discharge of single-cell Li-ion (2.7–4.2V) and multi-cell alkaline (up to 5.5V), with 1.8V minimum start-up. |
| Output Voltage Range | 1.5V–5V (adjustable via FB resistor divider): Enables direct powering of 1.8V/2.5V/3.3V/5V logic rails without external LDOs. |
| Switch Current Limit | 4.2A typical steady-state: Sustains 2A continuous output at 3.3V with ≥95% peak efficiency, even under VIN = 2.5V. |
| Quiescent Current | 25μA typical: Extends runtime in always-on battery applications like wearables and IoT sensors. |
| Switching Frequency | 2MHz fixed (±15%): Enables use of compact 1μH inductors and reduces EMI filtering burden in space-constrained PCBs. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis: Prevents permanent damage during sustained overload or poor heatsinking. |
| Power Good Threshold | 91.5% VREF rising / 76% VREF falling: Provides precise ±2.5% output monitoring for system sequencing and fault detection. |
Pinout & Package
MP28164GD-Z is housed in a thermally enhanced QFN-11 package (2mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports high-current routing and efficient heat dissipation in ultra-compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Pull high to activate regulator; internal 1.5MΩ pull-down ensures safe default-off state during power-up. |
| 2 MODE/SYNC | Mode selection & sync input | Low = auto PSM/PWM switching; high = forced fixed-frequency PWM; accepts external 1–3MHz clock for synchronization. |
| 3 PG | Open-drain power-good indicator | Sinks current when VFB drops below 76% VREF; requires external 100kΩ pull-up to VCC for system monitoring. |
| 4 VCC | Internal bias supply | Powered internally by higher of VIN or VOUT; decoupled with ≤1μF ceramic capacitor for stable gate drive. |
| 5 AGND | Analog ground reference | Separate low-noise ground for feedback and control circuitry; must be star-connected to PGND near IC. |
| 6 FB | Output voltage feedback input | Monitors resistive divider ratio; sensitive to noise-requires short, shielded trace away from SW1/SW2 nodes. |
| 7 VOUT | Regulated output node | Connects to output capacitor bank; high-current path requiring wide copper pour and low-ESR ceramics (≥22μF). |
| 8 SW2 | Switch node 2 | Connects to one end of power inductor; carries bidirectional high-frequency current in buck/boost/buck-boost modes. |
| 9 PGND | Power ground return | High-current return path for switches and inductor; must be solid plane tied to thermal pad for thermal and EMI performance. |
| 10 SW1 | Switch node 1 | Connects to other end of power inductor; complements SW2 in 4-switch topology to enable seamless VIN/VOUT crossover. |
| 11 VIN | Main input supply | Accepts 1.2–5.5V source; requires local 10μF+ ceramic capacitor; feeds power stage and partially biases VCC during startup. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor buck-boost architecture | Eliminates need for separate buck + boost converters or magnetic coupling, reducing BOM count and board area by >40% vs. dual-stage solutions. |
| Integrated 4.2A MOSFETs with 22mΩ/27.5mΩ RDS(ON) | Enables 2A continuous output at 3.3V without external switches; low conduction loss maintains >90% efficiency down to 10mA load. |
| Selectably synchronous 2MHz operation | Fixed frequency ensures predictable EMI profile; external sync capability allows clock alignment in multi-rail systems to avoid beat frequencies. |
| Hiccup-mode short-circuit protection | Shuts down on sustained overload, recovers after ~8ms, and re-attempts soft-start-prevents thermal runaway while preserving system visibility. |
| Load disconnect during shutdown | Isolates VOUT from VIN when disabled, preventing back-powering of upstream sources and enabling true zero-quiescent standby states. |
Applications
| Wireless Headphones | Medical Wearables |
|---|---|
|
Use Scenario: Compact earbud with Bluetooth SoC, rechargeable Li-ion cell, and analog audio amplifiers requiring stable 3.3V rail across 4.2V–2.7V battery range. IC Role / Device Role / Timing Role: Single-inductor buck-boost regulator providing seamless voltage regulation without mode transitions or output glitches during deep discharge. Use Value: Maintains consistent audio quality and Bluetooth link stability by delivering regulated 3.3V/2A with <10mV ripple-even at 2.5V input-eliminating need for backup LDOs. |
Use Scenario: Patch-style ECG monitor powered by coin-cell or thin-film battery, requiring ultra-low quiescent current and reliable 1.8V digital rail. IC Role / Device Role / Timing Role: Primary power management IC managing battery-to-rail conversion, shutdown sequencing, and power-good signaling to MCU. Use Value: 25μA IQ extends battery life to >7 days in active monitoring mode; PG output triggers MCU sleep/wake events with ±2.5% accuracy. |
| Industrial Handheld Scanners | Smart Home Sensors |
|
Use Scenario: Rugged barcode scanner using multi-cell alkaline batteries (3×AA = 4.5V nominal), driving laser diode, CMOS imager, and BLE radio. IC Role / Device Role / Timing Role: High-current buck-boost converter supplying 3.3V/2A to imaging subsystem while supporting cold-start from 1.8V. Use Value: 1.8V start-up enables operation until battery reaches 0.6V per cell; hiccup-mode SCP prevents latch-up during accidental shorted probe tips. |
Use Scenario: Battery-powered occupancy sensor with motion detection, Zigbee radio, and flash memory, operating over wide temperature (-40°C to +85°C). IC Role / Device Role / Timing Role: Primary DC/DC regulator delivering 3.3V to RF transceiver and microcontroller, with thermal shutdown protecting against enclosure overheating. Use Value: 160°C OTP with 20°C hysteresis ensures reliable operation in sealed enclosures; QFN-11 footprint fits sub-100mm² PCBs. |
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 | Lower 3A switch current limit; 2.5MHz fixed frequency; no hiccup-mode SCP; requires external compensation. | Limited to ≤1.5A loads at 3.3V; less robust under short-circuit; higher layout sensitivity due to external loop compensation. | Choose if 2.5MHz EMI profile is critical and load current stays below 1.5A; avoid for high-reliability industrial use. |
| MAX20034ATCB/V+ | Automotive-grade AEC-Q100 qualified; 5A switches; 2.2MHz; integrated spread-spectrum; higher 3.5V min VIN. | Not suitable for single-cell Li-ion start-up (<1.8V); overqualified for consumer portables; higher cost and larger 16-pin TQFN. | Choose only for automotive or harsh-environment designs requiring AEC-Q100; not cost-effective for battery-powered consumer gear. |
Compared with TPS63020DSJR and MAX20034ATCB/V+, MP28164GD-Z uniquely balances 4.2A capability, 1.8V start-up, hiccup-mode protection, and QFN-11 compactness-making it optimal for space- and efficiency-constrained portable electronics where battery voltage crosses the output rail.
Availability
MP28164GD-Z is available at Aetrix Electronics and suitable for wireless headphones, medical wearables, industrial handheld scanners, and smart home sensors requiring stable component supply across extended production lifecycles.
Supply support for MP28164GD-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 analog and mixed-signal ICs for power management, motor drive, and automotive applications.
The MP28164 belongs to MPS's single-inductor buck-boost (SIBB) product line, designed specifically for portable electronics requiring seamless regulation across wide input ranges-especially where battery voltage dips below the system rail.
FAQ
What is the minimum input voltage required to start up the MP28164GD-Z?
The MP28164GD-Z requires a minimum 1.8V input to initiate startup (VIN-UVLO-R = 1.7V typical), but once running, it sustains operation down to 1.2V input if VCC is biased above 1.56V-e.g., by a precharged output capacitor or auxiliary supply. Below 1.2V, RDS(ON) of SWA increases significantly, limiting usable output current.
Can the MP28164GD-Z operate with a 1μH inductor?
Yes-its 2MHz fixed switching frequency is optimized for 1μH inductors. The datasheet specifies L = 1μH, COUT = 2×22μF for typical performance. Inductor saturation current must exceed 3.5A peak (per Equation 4/5), and DCR should be ≤30mΩ to maintain >90% efficiency at 2A load.
How does the MODE/SYNC pin affect light-load efficiency?
When MODE/SYNC is low, the device enters pulse-skipping mode (PSM) under light load (<10mA), reducing switching frequency and quiescent current to ~25μA. When high, it remains in fixed-frequency PWM, increasing light-load losses but minimizing output voltage ripple-critical for noise-sensitive analog circuits.
Does the MP28164GD-Z support external synchronization?
Yes-applying a 1MHz–3MHz square-wave clock to the MODE/SYNC pin synchronizes the internal oscillator. This eliminates beat frequencies in multi-rail systems and simplifies EMI filter design by fixing the fundamental switching harmonic.
What happens during a short-circuit event at VOUT?
When VOUT collapses below 60% of target (e.g., <1.98V for 3.3V setpoint), the MP28164GD-Z enters hiccup mode: it stops switching for ~8ms, then attempts soft-start recovery. If the fault persists, it repeats the cycle-limiting average power dissipation and junction temperature rise to safe levels.
Is the QFN-11 thermal pad required to be soldered?
Yes-the exposed thermal pad is electrically connected to PGND and is essential for thermal performance and current return. It must be soldered to a dedicated PGND copper pour with ≥4 thermal vias (0.3mm diameter) to inner ground planes to achieve the specified θJA = 70°C/W and sustain 2A continuous output.
How is output voltage accuracy affected by temperature?
The internal 500mV reference has ±1.5% variation over –40°C to +125°C (492.5–507.5mV), translating to ±1.5% output voltage error for a standard resistor divider. For tighter regulation, use 0.1% tolerance resistors and minimize thermal gradients across the FB network.
MP28164GD-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 11-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.2V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 4.2A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 11-QFN (2x3)
MP28164GD-Z FAQ
1.How can I place an order for MP28164GD-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP28164GD-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 MP28164GD-Z reliable?
The price and inventory of MP28164GD-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP28164GD-Z is usually 5 days.
3.What payment methods are accepted for MP28164GD-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP28164GD-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP28164GD-Z?
MP28164GD-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP28164GD-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 MP28164GD-Z?
For technical support, including MP28164GD-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP28164GD-Z requirements.
6.How does Aetrix verify that MP28164GD-Z is sourced from the original manufacturer or authorized distributors?
All MP28164GD-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 MP28164GD-Z meets industry standards.
7.What is the process for return or replacement of MP28164GD-Z?
All MP28164GD-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP28164GD-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 MP28164GD-Z part is unused and in its original packaging.
Return procedure for MP28164GD-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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