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Monolithic Power Systems Inc. MP3432GL-Z
- Part No.:
- MP3432GL-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 13-PowerVFQFN
- Datasheet:
-
MP3432GL-Z.pdf
- Description:
- IC REG BOOST ADJ 10A 13QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,134
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Product details
Overview
MP3432GL-Z from Monolithic Power Systems is a fully integrated, synchronous boost converter IC with pass-through mode and programmable switching current limit. It operates from 0.8V–13V input, delivers up to 16V output, supports 30W average/40W peak load from 3.3V input, and integrates 6.5mΩ/10mΩ MOSFETs in a QFN-13 (3mm×4mm) package for high-efficiency power conversion in portable battery-powered systems.
For engineers reviewing the MP3432GL-Z datasheet, MP3432GL-Z pinout, MP3432GL-Z application, or MP3432GL-Z equivalent, this page provides verified technical context, confirmed pin functions, real-world efficiency data at 3.6VIN→9V/3A (>95%), COT control behavior under transient load, and validated alternative selection guidance for notebook, Bluetooth speaker, and quick-charge power bank designs.
Technical Context
The MP3432GL-Z implements constant-off-time (COT) control with adaptive loop response, enabling sub-10μs transient recovery during load steps. Its dual-MOSFET architecture eliminates external Schottky diodes, while programmable ILIM resistor sets peak current limit from 6A to 14A depending on RILIM value (e.g., 36kΩ → 10A typical).
Three selectable light-load modes-pulse-skip (PSM), forced continuous conduction (FCCM), and ultrasonic (USM >23kHz)-are controlled via MODE pin voltage thresholds (0.2–0.7V, 0.9–1.2V, >1.6V). Auto pass-through activates in PSM when VIN ≥ VOUT−SET, turning off LS-FET and holding HS-FET on to bypass switching losses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching frequency | Fixed 600kHz - ensures predictable EMI profile and simplifies filter design for compact PCB layouts. |
| Input voltage range | 0.8V to 13V - supports single-cell Li-ion (2.7V start-up) and wide-range industrial inputs without external bias. |
| Output voltage range | Up to 16V - enables USB PD-compatible 9V/12V/15V outputs from low-voltage batteries. |
| Peak current limit | Programmable 6–14A via ILIM resistor - allows precise overload protection tuning across varying inductor and load conditions. |
| Efficiency | >95% at 3.6VIN→9V/3A - minimizes thermal stress and extends runtime in space-constrained portable devices. |
| Thermal shutdown | 150°C with 25°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Quiescent current | 25μA (VIN pin, no switching) - preserves battery life in always-on standby states of POS terminals and speakers. |
Pinout & Package
MP3432GL-Z is housed in a thermally enhanced QFN-13 (3mm × 4mm, 0.5mm pitch) package with exposed thermal pad. Pin 7 (PGND) and Pin 6 (AGND) are separate ground terminals to isolate power and analog return paths, minimizing noise coupling into feedback and compensation networks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power switch node | Connects internal LS-FET drain and HS-FET source; ties directly to inductor - critical for low-inductance layout and EMI control. |
| 2 VDD | Internal bias supply | Self-powered from VIN or VOUT; requires 4.7μF ceramic decoupling - enables operation even when VIN drops below 3.4V. |
| 3 SS | Soft-start control | Capacitor-to-ground sets VOUT ramp rate - prevents inrush current and stabilizes startup into large capacitive loads. |
| 4 COMP | Error amplifier output | Connect RC network to AGND for loop compensation - determines stability margin and transient response speed. |
| 5 FB | Voltage feedback input | Resistor divider from VOUT sets regulation point (0.99–1.01V reference) - accuracy directly impacts output tolerance. |
| 6 AGND | Analog ground reference | Separate from PGND - must be routed under FB/COMP/SS pins only to avoid noise injection into control loop. |
| 7 PGND | Power ground return | High-current return path for LS-FET and inductor - connects to thermal pad for optimal heat dissipation. |
| 8 VOUT | Boost output | Drain of internal HS-FET - supplies VDD when VOUT > VIN and VIN < 3.4V, enabling seamless pass-through operation. |
| 9 ILIM | Current limit programming | Resistor-to-AGND sets peak switching current - enables accurate overcurrent protection without sensing resistors. |
| 10 MODE | Operating mode select | Voltage-controlled selection of PSM/FCCM/USM - floating = USM; 0.2–0.7V = PSM; >1.6V = FCCM. |
| 11 EN | Enable control | Logic-level input (1.15–1.31V threshold); connects to VIN for automatic startup - also programs UVLO hysteresis. |
| 12 VIN | Main input supply | 0.8–13V input with 2.7V start-up - bypassed locally to minimize input ripple and ensure stable VDD generation. |
| 13 BST | Bootstrap supply | Capacitor between BST and SW powers HS-FET gate driver - enables full enhancement of synchronous rectifier. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power MOSFETs | 6.5mΩ LS-FET + 10mΩ HS-FET - eliminates external diode and reduces BOM count while maintaining >95% efficiency at 3.6V→9V/3A. |
| Auto pass-through mode | Activates in PSM when VIN ≥ VOUT−SET - bypasses switching losses entirely, reducing quiescent current to 600μA and improving light-load efficiency. |
| Ultrasonic mode (USM) | Forced >23kHz minimum switching - avoids audible noise in Bluetooth speakers and notebooks without sacrificing PSM-level efficiency above 33kHz. |
| Programmable UVLO | Configurable rising/falling thresholds (2.2–2.6V / 2.0–2.4V) via EN pin - enables custom battery cutoff and brown-out recovery behavior. |
| Adaptive COT control | Dynamic off-time adjustment based on VIN/VOUT ratio - maintains stable regulation across wide input/output combinations without external compensation tuning. |
Applications
| Notebook Power Management | Bluetooth Speaker Boost Stage |
|---|---|
|
Use Scenario: Step-up from single-cell Li-ion (3.0–4.2V) to 9V/12V for USB-C PD negotiation and display backlight drivers. IC Role / Device Role / Timing Role: Primary synchronous boost controller regulating stable output under dynamic CPU/GPU load transients. Use Value: >95% efficiency at 3.6V→9V/3A extends battery runtime; auto pass-through reduces quiescent loss when system enters sleep mode. |
Use Scenario: Generating 9V rail from 3.7V battery to drive Class-D amplifier and LED indicators in portable audio systems. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter operating in USM to suppress audible switching noise during music playback. Use Value: Ultrasonic mode ensures silent operation below 20kHz; integrated MOSFETs eliminate Schottky forward drop and thermal derating concerns. |
| Portable POS Terminal | Quick-Charge Power Bank |
|
Use Scenario: Powering 5V/3A USB host port and 12V thermal printer from 3.6V nominal battery during transaction processing. IC Role / Device Role / Timing Role: Dual-rail capable boost IC delivering regulated output under pulsed 4A peak loads from barcode scanner activation. Use Value: Programmable 10A peak current limit (RILIM=36kΩ) handles short-duration printer motor surges without foldback or shutdown. |
Use Scenario: Stepping up 3.6V battery to 9V/2A for fast-charging smartphones via USB PD sink negotiation. IC Role / Device Role / Timing Role: High-power boost stage supporting 30W average / 40W peak delivery with thermal foldback at 150°C junction. Use Value: QFN-13 package with exposed thermal pad sustains 30W output in compact 25mm² footprint; PSM mode extends idle battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT4801BZQW | Fixed 1.2MHz switching frequency; no pass-through mode; 5.5mΩ/8.5mΩ MOSFETs; requires external bootstrap diode. | Lacks auto pass-through and USM - unsuitable for ultra-low-noise audio or deep-sleep battery optimization. | Select when higher frequency (1.2MHz) enables smaller magnetics, and light-load noise is not critical. |
| TPS61088RHLR | Adjustable 500kHz–2MHz frequency; no programmable current limit; 11mΩ/13mΩ MOSFETs; no USM or pass-through. | Higher RDS(ON) reduces efficiency at 3A; fixed 1.2V FB reference limits output flexibility vs. MP3432's 1.0V reference. | Choose for TI ecosystem compatibility and adjustable frequency, but expect ~2–3% lower efficiency at 3.6V→9V/3A. |
Compared with RT4801BZQW and TPS61088RHLR, MP3432GL-Z uniquely combines pass-through mode, ultrasonic light-load operation, and programmable current limiting - making it optimal for battery-powered audio and computing where efficiency, noise, and transient robustness are co-prioritized.
Availability
MP3432GL-Z is available at Aetrix Electronics and suitable for notebook power management, Bluetooth speaker boost stages, and portable POS terminal designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP3432GL-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 power ICs, with over two decades of leadership in DC-DC conversion, motor drivers, and LED lighting controllers.
The MP3432 belongs to MPS's high-efficiency synchronous boost converter product line, designed specifically for portable battery-powered applications demanding wide input range, low quiescent current, and intelligent light-load behavior without external components.
FAQ
What is the minimum input voltage required for MP3432GL-Z to start switching?
The MP3432GL-Z starts switching at 2.7V input when no external VDD bias is applied. With an external 3V VDD bias, startup is guaranteed down to 0.9V input. This dual-start capability supports ultra-low-voltage battery discharge scenarios while maintaining reliable VDD regulation through either VIN or VOUT.
How does the auto pass-through mode function, and when does it activate?
Auto pass-through activates in PSM mode when VIN rises to within ~100mV of the regulated VOUT voltage (i.e., VIN ≥ VOUT−SET). The controller disables the LS-FET and holds the HS-FET continuously on, effectively creating a low-loss conduction path. This reduces quiescent current to 600μA and eliminates switching losses during near-bypass conditions.
Can MP3432GL-Z operate with an input voltage lower than its output voltage setting?
Yes - the MP3432GL-Z supports input voltages as low as 0.8V while regulating up to 16V output. Its COT control and integrated MOSFETs enable stable boost operation even at extreme VIN/VOUT ratios (e.g., 0.8V→16V), though minimum on-time (80ns) imposes practical limits on achievable duty cycle.
What is the role of the MODE pin, and what happens if it's left floating?
The MODE pin selects operating mode: 0.2–0.7V = PSM, 0.9–1.2V = USM, >1.6V = FCCM. If left floating, the device defaults to ultrasonic mode (USM), ensuring switching remains above 23kHz to prevent audible noise - a safe default for audio-sensitive applications like Bluetooth speakers.
How is the switching current limit programmed, and what is its accuracy?
The switching peak current limit is set by an external resistor (RILIM) from ILIM pin to AGND. With RILIM = 36kΩ, the typical limit is 10A (±0.7A). Accuracy is maintained across temperature via on-die calibration; datasheet specifies ±10% variation over −40°C to +125°C junction range.
Does MP3432GL-Z require external compensation components?
Yes - the COMP pin requires an external RC network (resistor + capacitor to AGND) for loop compensation. Unlike fixed-compensation converters, MP3432GL-Z's adaptive COT architecture allows tailoring phase margin and transient response to specific inductor, output capacitor, and load conditions.
What thermal performance can be expected in a standard 4-layer PCB layout?
On a 4-layer 63mm×63mm JEDEC-standard board (EV3432-L-00A), θJA is 31°C/W. At 30W output with 95% efficiency (1.5W dissipation), junction rise is ~47°C above ambient - well within the 125°C max operating range. Thermal pad soldering is mandatory for rated power delivery.
MP3432GL-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 13-PowerVFQFN
- 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):
- 13V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 10A (Switch)
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 13-QFN (3x4)
MP3432GL-Z FAQ
1.How can I place an order for MP3432GL-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3432GL-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 MP3432GL-Z reliable?
The price and inventory of MP3432GL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3432GL-Z is usually 5 days.
3.What payment methods are accepted for MP3432GL-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3432GL-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3432GL-Z?
MP3432GL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3432GL-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 MP3432GL-Z?
For technical support, including MP3432GL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3432GL-Z requirements.
6.How does Aetrix verify that MP3432GL-Z is sourced from the original manufacturer or authorized distributors?
All MP3432GL-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 MP3432GL-Z meets industry standards.
7.What is the process for return or replacement of MP3432GL-Z?
All MP3432GL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3432GL-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 MP3432GL-Z part is unused and in its original packaging.
Return procedure for MP3432GL-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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