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Monolithic Power Systems Inc. MP3437GRP-Z
- Part No.:
- MP3437GRP-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VQFN
- Datasheet:
-
MP3437GRP-Z.pdf
- Description:
- IC REG BOOST ADJ 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,789
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Product details
Overview
MP3437GRP-Z from Monolithic Power Systems is a fully integrated, synchronous boost converter IC with 2.7V–16V input range, 16V maximum output voltage, 9.5A internal switch current limit, and 600kHz fixed-frequency COT control-designed for high-efficiency step-up power conversion in portable SSD VPP rails and AI speaker bias supplies.
For engineers reviewing the MP3437GRP-Z datasheet, MP3437GRP-Z pinout, MP3437GRP-Z application, or MP3437GRP-Z equivalent, this device delivers verified >90% efficiency at 3.3VIN→8V/2.5A, supports automatic pass-through mode above VOUT_SET, and offers MODE-selectable light-load operation (PSM/FCCM/USM) in its QFN-10 package.
Technical Context
The MP3437GRP-Z implements adaptive constant-off-time (COT) control with cycle-by-cycle current limiting on the low-side MOSFET and zero-current detection for high-side MOSFET turn-off-enabling fast transient response and stable regulation across 0.8V–16V input and up to 16V output. Its internal 14mΩ LS-FET and 21mΩ HS-FET eliminate external diode requirements.
Operating modes are selected via the MODE pin: floating or 0.95–1.2V enables pulse-skip mode (PSM) with automatic pass-through when VIN > VOUT_SET; ≥1.6V enables forced continuous conduction mode (FCCM); 0–0.6V enables ultrasonic mode (USM) clamped between 23–33kHz to suppress audible noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 16V start-up; 0.8V to 16V operational - supports single-cell Li-ion and wide-input industrial rails. |
| Output Voltage | Programmable up to 16V via FB resistor divider - enables SSD VPP (12–15V), display bias, and audio amplifier rails. |
| Switch Current Limit | 9.5A typical - sets peak inductor current and defines maximum deliverable load power (~20W from 3.3V). |
| Efficiency | >90% at 3.3VIN → 8V/2.5A - achieved via integrated 14mΩ/21mΩ MOSFETs and optimized COT control loop. |
| Switching Frequency | 600kHz fixed - enables compact magnetics and reduces EMI filtering burden in space-constrained designs. |
| Protection Features | Programmable UVLO, 150°C OTP, output OVP (16.5V), and FB OVP (110% × VREF) - ensures robust system-level fault tolerance. |
| Soft-Start Time | 4ms - controls inrush current during startup and prevents output overshoot in sensitive loads. |
Pinout & Package
MP3437GRP-Z is housed in a thermally enhanced QFN-10 (2mm × 2.5mm, 0.4mm pitch) package with exposed thermal pad for PCB heat dissipation. Pin functions are validated per MPS MP3437 Rev. 1.01 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Pull high to VIN for auto-start; programs VIN UVLO threshold - must not be left floating. |
| 2 VDD | Internal bias supply | Powered by VIN (>3.4V) or VOUT/VIN max; requires 4.7μF local ceramic decoupling. |
| 3 FB | Feedback reference input | Senses output via resistor divider; 1.0V nominal reference enables precise VOUT programming. |
| 4,5 GND | Power ground | Dual GND pins minimize ground bounce; connect analog signals near Pin 4 for optimal noise immunity. |
| 6 SW | Switch node | Connects to inductor; ties drain of LS-FET and source of HS-FET - critical for layout EMI control. |
| 7 VOUT | Regulated output | Drain of HS-FET; powers VDD when VOUT > VIN and VIN < 3.4V - enables seamless pass-through. |
| 8 BST | Bootstrap supply | Capacitor between BST and SW provides gate drive for HS-FET - requires 0.1μF X7R ceramic. |
| 9 MODE | Light-load mode select | Floating = PSM; >1.6V = FCCM; 0–0.6V = USM - only present in QFN-10 (not TSOT23-8). |
| 10 VIN | Main input supply | Bypass with local ceramic capacitor; minimum 2.7V required for startup - powers internal regulators. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 14mΩ LS-FET + 21mΩ HS-FET - eliminates external Schottky diode and reduces BOM count and footprint. |
| Adaptive COT control | Fast transient response without external compensation - maintains regulation under dynamic load steps (e.g., SSD write bursts). |
| Automatic pass-through mode | HS-FET remains on when VIN > VOUT_SET in PSM - reduces conduction loss and improves light-load efficiency. |
| Ultrasonic mode (USM) | 23–33kHz switching clamping - avoids audible noise in battery-powered speakers and portable POS terminals. |
| Programmable UVLO | Set via EN pin voltage - allows custom brown-out behavior aligned with battery discharge profiles. |
Applications
| SSD VPP Power Rail | AI Speaker Bias Supply |
|---|---|
|
Use Scenario: Providing 12–15V programming voltage for NAND flash in portable solid-state drives during write/erase cycles. IC Role / Device Role / Timing Role: Synchronous boost converter delivering regulated VPP rail with fast load-step response to sustain flash programming pulses. Use Value: Integrated 9.5A switch and >90% efficiency enable compact, thermally efficient VPP generation without external FETs or diodes. |
Use Scenario: Generating clean 8–12V bias for Class-D audio amplifiers and DSP cores in voice-controlled smart speakers. IC Role / Device Role / Timing Role: High-efficiency step-up regulator operating in USM to avoid audible switching noise during standby and playback. Use Value: Ultrasonic mode (23–33kHz) eliminates buzz/hum while maintaining >85% efficiency at 100mA load - critical for always-on listening. |
| Portable POS Terminal | Bluetooth Speaker Power |
|
Use Scenario: Boosting single-cell Li-ion (3.0–4.2V) to 5V/3A for USB-C peripheral charging and display backlight drivers. IC Role / Device Role / Timing Role: Fully integrated boost converter with automatic pass-through - reduces dropout loss when battery voltage exceeds 5V. Use Value: Seamless transition between boost and pass-through modes extends runtime and simplifies power architecture vs. discrete solutions. |
Use Scenario: Delivering 8V/2.5A to Class-D amplifier stages in compact Bluetooth speakers powered by 3.3V–4.2V batteries. IC Role / Device Role / Timing Role: Synchronous boost IC with COT control and soft-start - ensures stable startup and low-noise operation during music transients. Use Value: 4ms internal soft-start prevents pop/click at power-on; 600kHz frequency enables small 1.5μH inductors and minimal PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT4801GSP | 4.5A switch current limit; 2.5V–16V input; no MODE pin; fixed 1.2MHz frequency | Limited to ≤12V output; lower peak current restricts use in 20W SSD VPP rails | Select when board space is constrained and 1.2MHz enables smaller inductors - but verify thermal margin at 2.5A load. |
| TPS61088RHLR | 12A switch limit; 2.7V–12V input; 13.2V max output; no USM mode; 500kHz–2MHz adjustable frequency | Cannot support 16V output or ultrasonic noise suppression - unsuitable for AI speaker standby audio purity | Prefer for higher-current 12V rails where programmable frequency aids EMI tuning - but requires external OVP for 16V systems. |
Compared with RT4801GSP and TPS61088RHLR, MP3437GRP-Z uniquely combines 16V output capability, 9.5A current limit, and USM noise suppression - making it the only qualified solution for portable SSD VPP and premium AI speaker bias where both voltage headroom and acoustic performance are critical.
Availability
MP3437GRP-Z is available at Aetrix Electronics and suitable for SSD VPP rails, AI speaker bias supplies, portable POS terminals, and Bluetooth speaker power systems requiring stable component supply, full production traceability, and long-term lifecycle support.
Supply support for MP3437GRP-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 converters, motor drivers, and LED controllers.
The MP3437 belongs to MPS's high-current synchronous boost converter product line, engineered specifically for portable and battery-powered applications demanding high efficiency, small form factor, and intelligent light-load behavior.
FAQ
What is the minimum input voltage required for MP3437GRP-Z startup?
The MP3437GRP-Z requires a minimum 2.7V input voltage at VIN to initiate startup when no external VDD bias is applied. With a 3V external VDD bias, startup is guaranteed down to 0.95V at VIN - enabling operation during deep battery discharge in portable devices.
Does MP3437GRP-Z support automatic pass-through mode in all operating modes?
No - automatic pass-through mode is only active in pulse-skip mode (PSM), which occurs when the MODE pin is floating or biased between 0.95V and 1.2V. In FCCM and USM, the device continues switching even when VIN exceeds VOUT_SET, preventing true pass-through conduction.
How does the MODE pin function differ between MP3437GRP-Z and MP3437GJ-Z?
The MP3437GRP-Z (QFN-10) includes a dedicated MODE pin (Pin 9) for selecting PSM, FCCM, or USM. The MP3437GJ-Z (TSOT23-8) lacks this pin and operates exclusively in PSM - making GRP-Z the only variant supporting ultrasonic or forced-continuous modes.
What is the purpose of the BST capacitor, and what value is recommended?
The BST capacitor (0.1μF X7R ceramic) forms a charge pump with the internal bootstrap circuit to drive the high-side MOSFET gate above VOUT. It must be placed directly between BST and SW pins with minimal trace length to ensure reliable HS-FET turn-on and prevent shoot-through during switching transitions.
Can MP3437GRP-Z safely regulate 16V output from a 3.3V input?
Yes - the MP3437GRP-Z is rated for up to 16V output voltage and supports 3.3V-to-16V conversion with appropriate inductor selection (e.g., MPL-AL6050-1R5) and feedback resistors. Efficiency drops to ~78% at full 2.5A load, but thermal performance remains within spec with proper PCB copper area.
Is over-voltage protection (OVP) active during pass-through mode?
Yes - output OVP (16.5V threshold) remains fully functional during automatic pass-through mode. However, FB OVP (110% × VREF) is disabled in pass-through since the error amplifier is inactive - system-level OVP relies on the primary VOUT clamp.
What thermal derating applies to MP3437GRP-Z at 85°C ambient temperature?
With θJA = 44°C/W on a 2-layer 63mm×63mm PCB, the MP3437GRP-Z reaches thermal shutdown at ~12.5W dissipation at 85°C ambient. For 20W output applications, thermal design must include ≥200mm² exposed copper under the thermal pad and optional airflow to maintain TJ < 125°C.
MP3437GRP-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 10-VQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 16V
- Current - Output:
- -
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (2x2.5)
MP3437GRP-Z FAQ
1.How can I place an order for MP3437GRP-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3437GRP-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 MP3437GRP-Z reliable?
The price and inventory of MP3437GRP-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3437GRP-Z is usually 5 days.
3.What payment methods are accepted for MP3437GRP-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3437GRP-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3437GRP-Z?
MP3437GRP-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3437GRP-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 MP3437GRP-Z?
For technical support, including MP3437GRP-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3437GRP-Z requirements.
6.How does Aetrix verify that MP3437GRP-Z is sourced from the original manufacturer or authorized distributors?
All MP3437GRP-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 MP3437GRP-Z meets industry standards.
7.What is the process for return or replacement of MP3437GRP-Z?
All MP3437GRP-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3437GRP-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 MP3437GRP-Z part is unused and in its original packaging.
Return procedure for MP3437GRP-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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