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Monolithic Power Systems Inc. MP28164GD-P
- Part No.:
- MP28164GD-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 11-VFQFN
- Datasheet:
-
MP28164GD-P.pdf
- Description:
- IC REG BUCK BOOST ADJ 4.2A 11QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,652
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Product details
Overview
MP28164GD-P from Monolithic Power Systems is a high-efficiency, single-inductor buck-boost DC/DC converter with integrated 4.2A MOSFET switches, fixed 2MHz PWM operation or pulse-skipping mode, 1.2V–5.5V input range, and 1.5V–5V adjustable output. It delivers up to 2A at 3.3V output from a 2.5V–5.5V input and targets battery-powered portable electronics requiring seamless voltage regulation across varying cell states.
For engineers reviewing the MP28164GD-P datasheet, MP28164GD-P pinout, MP28164GD-P application, or MP28164GD-P equivalent, key selection criteria include its dual-mode (PSM/PWM) control logic, 25μA quiescent current in light-load PSM, hiccup-mode short-circuit protection, power-good indicator with 76–91.5% VREF thresholds, and QFN-11 (2mm×3mm) thermal performance validated to 125°C junction temperature.
Technical Context
The MP28164GD-P implements current-mode control with dual error amplifiers (VC-Buck and VC-Boost) and slope-compensated ramp sensing to manage buck, boost, and buck-boost operating regions dynamically. Its four internal MOSFETs (SWA–SWD) are configured in a single-inductor topology that supports continuous conduction mode across VIN < VOUT, VIN ≈ VOUT, and VIN > VOUT conditions without external diodes or multiple inductors.
It integrates internal soft-start (1.5ms reference time), load disconnect during shutdown, over-temperature shutdown at 160°C with 20°C hysteresis, and over-voltage protection triggering at ~6.3V. The MODE/SYNC pin enables either automatic PSM-to-PWM transition or forced fixed-frequency operation, while the open-drain PG pin provides precise power-good status referenced to 500mV internal VREF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.2V to 5.5V - supports single-cell Li-ion (2.7–4.2V) and multi-cell alkaline (up to 5.5V) without brownout during discharge. |
| Output Voltage Range | 1.5V to 5V - adjustable via external resistor divider; maintains regulation even when VIN crosses VOUT. |
| Switching Current Limit | 4.2A typical - enables 2A continuous load at 3.3V output with margin for transient peaks. |
| Quiescent Current | 25μA typical - minimizes battery drain in standby, critical for >1-year shelf life in IoT sensors. |
| Switching Frequency | 2MHz fixed or syncable (1–3MHz) - allows compact 1μH inductor and reduces EMI fundamental frequency above AM band. |
| Efficiency | Up to 95% - achieved via low RDS(ON) NMOS (22mΩ) and PMOS (27.5mΩ) switches and optimized gate drive. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects silicon integrity under sustained overload or poor PCB copper pour. |
Pinout & Package
MP28164GD-P is housed in a thermally enhanced QFN-11 package (2mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports ≤1.78W continuous power dissipation at +25°C ambient (θJA = 70°C/W) and requires solder paste stencil optimization for reliable thermal vias under the pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Pull high ≥1.2V to activate; internal 1.5MΩ pull-down ensures default disable; supports system-level power sequencing. |
| 2 MODE/SYNC | Mode selection & sync input | Low = auto PSM/PWM switching; high = forced fixed-frequency PWM; accepts external 1–3MHz clock for EMI reduction. |
| 3 PG | Open-drain power-good output | Asserts high when FB ≥91.5% of 500mV VREF; deasserts at ≤76% VREF; requires external 100kΩ pull-up to VCC. |
| 4 VCC | Bias supply for control circuitry | Auto-selected from higher of VIN or VOUT; decoupled with ≥1μF ceramic; enables operation down to VIN = 1.2V if VOUT powers VCC. |
| 5 AGND | Analog ground reference | Separate from PGND to isolate feedback path from high di/dt noise; must be star-connected near FB pin. |
| 6 FB | Output voltage feedback input | Monitors resistive divider from VOUT; 500mV internal reference sets output; sensitive to layout-keep traces short and away from SW nodes. |
| 7 VOUT | Regulated output terminal | Delivers final buck-boost output; requires ≥22μF low-ESR ceramic capacitor placed adjacent to pin and PGND. |
| 8 SW2 | Power switch node | Connects to one end of inductor; carries full AC inductor current; routing must minimize loop area with SW1 and PGND. |
| 9 PGND | Power ground return | High-current return path for all internal MOSFETs; must be solid copper plane tied to thermal pad; separate from AGND until single-point connection. |
| 10 SW1 | Power switch node | Connects to other end of inductor; forms switching node pair with SW2; identical layout constraints as SW2. |
| 11 VIN | Main power input | Supplies power stage; requires ≥10μF low-ESR ceramic capacitor placed directly between VIN and PGND. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor buck-boost topology | Eliminates need for separate buck/boost ICs or dual inductors-reduces BOM count and board area by >40% vs. discrete solutions. |
| Selectably synchronous 2MHz operation | Enables use of 1μH inductors (vs. 4.7μH at 500kHz), cutting solution size by ~35% while maintaining >90% efficiency at 1A. |
| Hiccup-mode short-circuit protection | Shuts down for ~8ms then retries-prevents thermal runaway during sustained overload without requiring external current-limit circuitry. |
| Internal soft-start with blanking | 1.5ms controlled VREF ramp plus 4ms blanking window prevents false hiccup triggers during startup or load transients. |
| Load disconnect in shutdown | Blocks reverse current flow from VOUT to VIN when disabled-preserves battery charge in always-on systems with backup rails. |
Applications
| Wireless Headphones | Medical Wearables |
|---|---|
|
Use Scenario: Li-ion powered active noise cancellation (ANC) headphones with variable load (DAC, amp, Bluetooth SoC) and deep discharge operation (2.8V–4.2V). IC Role / Device Role / Timing Role: Primary system regulator delivering stable 3.3V to mixed-signal audio chain regardless of battery voltage sag during peak ANC processing. Use Value: Maintains SNR >110dB by eliminating output droop-induced digital clock jitter and analog rail collapse during bass transients. |
Use Scenario: Patch-style ECG monitor with 7-day runtime on CR2032 coin cell (2.0V–3.0V), requiring regulated 2.8V for ultra-low-power ADC and BLE radio. IC Role / Device Role / Timing Role: Single-stage buck-boost regulator enabling direct CR2032 interface without intermediate charge-pump or LDO staging. Use Value: Extends usable battery capacity by 22% vs. LDO-based designs due to 95% efficiency at 100μA load and 25μA quiescent current. |
| Industrial Handheld Scanners | Smart Home Sensors |
|
Use Scenario: Rugged barcode scanner powered by 2×AA alkaline (1.8V–3.2V), needing 3.3V for CMOS image sensor and laser driver with burst-mode peak loads. IC Role / Device Role / Timing Role: High-current buck-boost controller supporting 2A pulsed loads while sustaining 3.3V ±2% during 100ms laser activation. Use Value: Prevents sensor frame loss and laser misfire by maintaining VOUT regulation during 4.2A switch current peaks with <50mV undershoot. |
Use Scenario: Battery-operated Zigbee temperature/humidity sensor using AAA cells (0.9V–1.5V per cell), requiring stable 3.0V for RF transceiver and microcontroller across full discharge curve. IC Role / Device Role / Timing Role: Input-wide buck-boost regulator enabling operation down to 1.2V total input-extending usable battery life beyond conventional boost-only ICs. Use Value: Delivers 3.0V @ 50mA with <1% line regulation from 1.2V–3.0V input, enabling 2× longer field deployment before battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63802DLPR | Lower 2A switch current limit; 1.8V min start-up; no hiccup SCP; 3.5MHz max frequency | Optimized for ultra-small footprint (1.2mm² WCSP); less robust for >1.5A pulsed loads | Prefer for space-constrained wearables where peak current ≤1.2A and thermal margin is ample. |
| MAX77827AEWE+T | Higher 5A switch rating; I²C programmable VOUT; 1.2MHz fixed frequency; larger 16-pin WLP | Requires digital interface and firmware support; better for multi-rail systems needing dynamic voltage scaling | Choose when system demands programmable output, telemetry, or coordinated rail sequencing via I²C. |
Compared with TPS63802DLPR and MAX77827AEWE+T, MP28164GD-P offers superior thermal robustness in QFN-11 for 2A continuous loads, deterministic hiccup protection without host intervention, and seamless analog-only configuration-making it optimal for cost-sensitive, high-volume portable devices without MCU resources.
Availability
MP28164GD-P is available at Aetrix Electronics and suitable for wireless headphones, medical wearables, industrial handheld scanners, and smart home sensors requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant sourcing.
Supply support for MP28164GD-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP28164GD-P belongs to MPS's single-inductor buck-boost (SIBB) product line, engineered specifically for battery-powered portable electronics needing wide-input, constant-output regulation without compromising efficiency, size, or reliability.
FAQ
What is the minimum input voltage required to start up the MP28164GD-P?
The MP28164GD-P requires a minimum 1.8V input to initiate startup (VIN-UVLO-R = 1.7V typical) when VCC is unpowered. However, if VCC is pre-biased-for example, from a partially charged battery or auxiliary rail-the device can begin regulation from as low as 1.2V input, though load capability is reduced due to higher RDS(ON) of the internal PMOS switch.
How does the MODE/SYNC pin affect light-load efficiency and output ripple?
When MODE/SYNC is pulled low, the MP28164GD-P enters pulse-skipping mode (PSM) under light loads, reducing switching frequency and quiescent current to 25μA-ideal for battery longevity. When pulled high, it forces fixed 2MHz PWM operation, which increases light-load losses but cuts output voltage ripple by >60% compared to PSM, benefiting noise-sensitive analog circuits.
Can the MP28164GD-P safely regulate output when input voltage equals output voltage?
Yes. The MP28164GD-P operates continuously across VIN = VOUT (buck-boost transition region) by dynamically interleaving buck and boost switching phases within each cycle. During this condition, both SWA/SWB and SWC/SWD are actively modulated, maintaining tight output regulation without dropout or mode-switching discontinuities.
What is the purpose of the separate AGND and PGND pins, and how should they be routed?
AGND provides a quiet reference for the error amplifier and feedback circuitry; PGND carries high di/dt switching currents from all internal MOSFETs. They must be kept as separate copper pours on the PCB and joined at a single point near the IC's thermal pad to prevent noise coupling into the FB node-critical for stability and load-transient response.
Does the MP28164GD-P support external synchronization, and what is the acceptable frequency range?
Yes. Driving the MODE/SYNC pin with an external clock synchronizes the internal oscillator across 1MHz to 3MHz. This feature enables EMI reduction through frequency dithering or alignment with system clocks, and is validated per the datasheet's synchronization range specification-not just nominal 2MHz.
How does the hiccup-mode short-circuit protection behave during sustained overload?
Under sustained short-circuit, the MP28164GD-P disables switching, waits ~8ms, then attempts soft restart. If VOUT remains below 60% of target after restart, it re-enters hiccup. This cycle repeats indefinitely without latch-off, limiting average power dissipation to safe levels (<300mW) and preventing thermal damage-even with no airflow or minimal copper area.
Is the power-good (PG) signal functional when the device is disabled via EN pin?
Yes. The PG pin retains self-driving capability: when EN = low and PG is externally pulled up (e.g., to a backup rail), the internal circuitry pulls PG low (~0.7V) if VOUT falls below the falling threshold (76% of VREF), enabling system-level fault monitoring independent of EN state.
MP28164GD-P 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-P FAQ
1.How can I place an order for MP28164GD-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP28164GD-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 MP28164GD-P reliable?
The price and inventory of MP28164GD-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP28164GD-P is usually 5 days.
3.What payment methods are accepted for MP28164GD-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP28164GD-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP28164GD-P?
MP28164GD-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP28164GD-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 MP28164GD-P?
For technical support, including MP28164GD-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP28164GD-P requirements.
6.How does Aetrix verify that MP28164GD-P is sourced from the original manufacturer or authorized distributors?
All MP28164GD-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 MP28164GD-P meets industry standards.
7.What is the process for return or replacement of MP28164GD-P?
All MP28164GD-P units undergo pre-shipment inspection (PSI). If there is an issue with MP28164GD-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 MP28164GD-P part is unused and in its original packaging.
Return procedure for MP28164GD-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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