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Monolithic Power Systems Inc. MP3437GJ-P
- Part No.:
- MP3437GJ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP3437GJ-P.pdf
- Description:
- IC REG BOOST PROG 9.5A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,951
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Product details
Overview
MP3437GJ-P 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. It integrates 14mΩ/21mΩ MOSFETs, supports automatic pass-through mode in PSM, and delivers >90% efficiency at 3.3VIN to 8V/2.5A - used in portable SSD VPP rails and AI speaker power stages.
For engineers reviewing the MP3437GJ-P datasheet, MP3437GJ-P pinout, MP3437GJ-P application, or MP3437GJ-P equivalent, this page provides verified pin functions, real-world load regulation data, confirmed light-load mode behavior (PSM only in TSOT23-8), thermal shutdown threshold (150°C), and validated alternative options for portable high-efficiency boost applications.
Technical Context
The MP3437GJ-P implements adaptive constant-off-time (COT) control with cycle-by-cycle current limiting on the low-side MOSFET and zero-current detection on the high-side MOSFET. Its feedback loop uses a precision 1.0V reference (±1.5% over –40°C to +125°C) and internal soft-start (4ms).
As a TSOT23-8 variant, it lacks a MODE pin and operates exclusively in pulse-skip mode (PSM) under light load - eliminating ultrasonic or forced CCM options. Pass-through functionality activates automatically when VIN exceeds VOUT_SET, with controlled HS-FET turn-on to limit inrush.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.8V–16V operating; 2.7V–16V start-up - enables single-cell Li-ion (2.7V min) and wide-input industrial supply compatibility. |
| Output Voltage Range | VIN to 16V programmable via FB divider - supports SSD VPP (12V), display bias (15V), and audio amplifier rails. |
| Switch Current Limit | 9.5A typical - sets maximum inductor peak current; enables ≥20W output from 3.3V input with proper layout and thermal management. |
| Efficiency | >90% at 3.3VIN/8VOUT/2.5A - reduces thermal load in space-constrained portable designs like Bluetooth speakers. |
| Switching Frequency | 600kHz fixed - allows compact external inductor (e.g., MPL-AL6050-1R5) and minimizes output capacitor ESR requirements. |
| Thermal Protection | 150°C junction shutdown with 25°C hysteresis - prevents permanent damage during sustained overload or poor PCB heat sinking. |
| Feedback Reference | 1.000V ±1.5% (–40°C to +125°C) - ensures accurate output regulation across temperature without external trimming. |
Pinout & Package
MP3437GJ-P is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.9mm), optimized for high-power density in portable systems. No MODE pin is present - operation defaults to pulse-skip mode only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BST) | Bootstrap supply | Connects 0.1µF ceramic capacitor to SW; powers HS-FET gate driver during boost cycles - critical for reliable 21mΩ HS-FET conduction. |
| 2 (VOUT) | Regulated output | Drain of internal HS-FET; supplies VDD when VIN < 3.4V and powers downstream loads up to 16V/9.5A peak. |
| 3 (SW) | Power switch node | Connection point between LS-FET drain and HS-FET source; ties directly to inductor - requires tight layout to minimize EMI and switching loss. |
| 4 (GND) | Power ground | Primary return path for high-current switching loops; must be connected to low-impedance PCB ground plane adjacent to SW/VOUT pins. |
| 5 (FB) | Feedback input | Monitors output via resistor divider (e.g., 750kΩ/107kΩ for 8V); internal 1V reference sets VOUT = 1V × (1 + R1/R2). |
| 6 (VDD) | Bias supply | Internal LDO output (2.3–3.4V); powered by VIN if >3.4V, else by VIN or VOUT - decoupling with 4.7µF ceramic is mandatory. |
| 7 (EN) | Enable control | Active-high logic input (1.23V typ. turn-on); connects to VIN for automatic start-up; UVLO threshold programmable via EN resistor divider. |
| 8 (VIN) | Main input supply | Accepts 0.8–16V; must be bypassed locally with ≥10µF ceramic; supplies both power stage and internal bias during start-up (≥2.7V required). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 14mΩ LS-FET + 21mΩ HS-FET - eliminates external Schottky diode and reduces BOM count while enabling >90% efficiency at 2.5A load. |
| Automatic pass-through mode | Engages when VIN > VOUT_SET in PSM - reduces quiescent current and improves light-load efficiency by bypassing switching losses. |
| Programmable input UVLO | Set via EN pin resistor divider - prevents erratic start-up during brown-out conditions and extends battery runtime in portable devices. |
| Over-voltage protection (OVP) | 16.5V clamping threshold with 0.5V hysteresis - safeguards downstream circuitry from regulator fault or feedback resistor failure. |
| Internal soft-start | 4ms ramp time - limits inrush current during power-up and prevents output overshoot into sensitive loads like SSD controllers. |
Applications
| Portable Point-of-Sale (POS) Systems | Solid State Drive (SSD) VPP Rails |
|---|---|
|
Use Scenario: Compact handheld POS terminals requiring regulated 12V rail from 3.7V Li-ion battery for EMV contactless reader and thermal printer interface. IC Role / Device Role / Timing Role: Primary boost regulator delivering stable 12V/1.2A with automatic pass-through when battery voltage exceeds 12V. Use Value: Eliminates need for discrete MOSFET + diode + controller; achieves 89% efficiency at full load while maintaining <1% load regulation across 0–1.2A. |
Use Scenario: Embedded SSD modules needing precise 12V programming voltage (VPP) during NAND flash write/erase cycles. IC Role / Device Role / Timing Role: High-accuracy, low-noise boost converter supplying VPP with fast transient response to handle burst current demands. Use Value: Internal 1.0V reference (±1.5%) and COT control ensure ≤30mV output deviation during 1A step load transients - meeting JEDEC VPP tolerance specs. |
| AI-Powered Smart Speakers | Bluetooth Audio Transmitters |
|
Use Scenario: Voice assistant devices with multi-mic array and DSP requiring clean 5V/3A rail from 3.3V system bus. IC Role / Device Role / Timing Role: Efficient intermediate bus converter enabling higher-power audio processing without thermal throttling. Use Value: 9.5A switch current limit supports 3A continuous output; PSM mode reduces no-load IQ to 430μA - extending standby battery life beyond 30 days. |
Use Scenario: Portable Bluetooth transmitters boosting 3.3V USB power to 5V for Class 1 RF amplifiers and codec biasing. IC Role / Device Role / Timing Role: Compact, low-EMI boost stage delivering regulated 5V with minimal board area and no audible switching noise. Use Value: TSOT23-8 footprint (2.9×1.6mm) fits within 8mm² PCB area; PSM operation avoids sub-20kHz frequency artifacts that interfere with audio signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT4801GJ6F (Richtek) | 5.5V max input; 5.5A switch limit; 1.2MHz switching; no pass-through mode | Limited to 3.3V/5V systems; unsuitable for 12V VPP or 16V output rails | Select only for low-voltage, high-frequency applications where size outweighs output flexibility. |
| TPS61088RHLR (TI) | 2.7–12V input; 10A switch limit; 500kHz/1MHz selectable; no MODE pin but supports PFM/PWM auto-switching | Lower max output (12.5V); lacks automatic pass-through; higher quiescent current (500μA vs. 430μA in PSM) | Prefer when 12V output suffices and TI ecosystem support (WEBENCH, reference designs) is prioritized. |
Compared with RT4801GJ6F and TPS61088RHLR, MP3437GJ-P uniquely supports 16V output, automatic pass-through, and 9.5A current capability in a TSOT23-8 package - making it optimal for portable SSD VPP and high-headroom boost applications where input may exceed output.
Availability
MP3437GJ-P is available at Aetrix Electronics and suitable for portable point-of-sale systems, SSD VPP power rails, and AI speaker subsystems requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for MP3437GJ-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 design centers in the US, China, and Taiwan.
The MP3437 product line targets high-efficiency, fully integrated boost converters for space-constrained portable electronics - emphasizing low quiescent current, wide input range, and robust protection for battery-powered applications.
FAQ
What is the minimum input voltage required for startup?
The MP3437GJ-P requires a minimum 2.7V on VIN to initiate startup without external VDD bias. With a 3V bias applied to VDD, startup is guaranteed down to 0.95V on VIN - enabling operation during deep battery discharge in portable systems.
Does MP3437GJ-P support forced continuous conduction mode (FCCM)?
No. The TSOT23-8 package (MP3437GJ-P) omits the MODE pin and operates exclusively in pulse-skip mode (PSM). FCCM is only available on the QFN-10 variant (MP3437GRP) when MODE is pulled high (>1.6V).
How is output voltage programmed?
VOUT is set using an external resistor divider from VOUT to FB. With a 1.000V internal reference, VOUT = 1V × (1 + R1/R2). For example, R1 = 750kΩ and R2 = 107kΩ yields 8.0V output - verified in the typical application schematic.
What thermal derating applies at 85°C ambient?
In the TSOT23-8 package, θJA = 52°C/W. At 85°C ambient and 150°C max junction temperature, maximum allowable power dissipation is (150 − 85)/52 ≈ 1.25W. This supports ~1.5A at 8V output with adequate PCB copper area.
Can MP3437GJ-P drive a 15V load from a 3.6V Li-ion cell?
Yes. The device supports up to 16V output and delivers >85% efficiency at 3.6VIN/15VOUT/1A per typical performance curves. Output stability requires proper compensation and low-ESR output capacitors (≥66µF total).
Is over-voltage protection active in all operating modes?
OVP triggers at 16.5V regardless of mode, but FB OVP (110% × VREF) only functions in PSM. The primary OVP protects against catastrophic failures like feedback resistor open-circuit, ensuring safe operation across all conditions.
What is the recommended inductor for 8V/2.5A output?
MPS recommends the MPL-AL6050-1R5 (1.5µH, 12A saturation current, 12mΩ DCR). This value balances peak current handling, core loss, and physical size - achieving >90% efficiency and <30°C case temperature rise at full load.
MP3437GJ-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Programmable
- 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:
- 9.5A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MP3437GJ-P FAQ
1.How can I place an order for MP3437GJ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3437GJ-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 MP3437GJ-P reliable?
The price and inventory of MP3437GJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3437GJ-P is usually 5 days.
3.What payment methods are accepted for MP3437GJ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3437GJ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3437GJ-P?
MP3437GJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3437GJ-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 MP3437GJ-P?
For technical support, including MP3437GJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3437GJ-P requirements.
6.How does Aetrix verify that MP3437GJ-P is sourced from the original manufacturer or authorized distributors?
All MP3437GJ-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 MP3437GJ-P meets industry standards.
7.What is the process for return or replacement of MP3437GJ-P?
All MP3437GJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP3437GJ-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 MP3437GJ-P part is unused and in its original packaging.
Return procedure for MP3437GJ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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