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Monolithic Power Systems Inc. MP4432GL-P
- Part No.:
- MP4432GL-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-PowerVQFN
- Datasheet:
-
MP4432GL-P.pdf
- Description:
- IC REG BUCK PROG 2.2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,250
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Product details
Overview
MP4432GL-P from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 90mΩ high-side and 40mΩ low-side MOSFETs, delivering up to 2.2A output current across a 3.3V–36V input range. It features programmable switching frequency (350kHz–2.5MHz), 10μA light-load quiescent current in AAM mode, and supports automotive cold-crank via low-dropout operation. Used in infotainment power rails and ADAS camera modules.
For engineers reviewing the MP4432GL-P datasheet, MP4432GL-P pinout, MP4432GL-P application, or MP4432GL-P equivalent, key selection criteria include valley-current OCP architecture, 80ns minimum on-time for high VIN/VOUT ratios, external clock synchronization capability, and BIAS pin support for efficiency optimization in multi-rail systems.
Technical Context
The MP4432GL-P employs current-mode control with peak-current limiting and valley-current detection for cycle-by-cycle over-current protection. Its advanced asynchronous mode (AAM) dynamically scales switching frequency under light load to reduce gate-driving and switching losses while maintaining regulation.
It integrates a 5V internal VCC regulator powered from VIN or optionally from an external 5–18V BIAS supply, enabling higher efficiency in buck-buck configurations. The device supports in-phase or 180° out-of-phase synchronization across multiple units via the PHASE pin for input ripple reduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 3.3V to 36V - supports full automotive battery range including cold-crank (4.5V) and load-dump (36V) |
| Output current | 2.2A continuous - sufficient for powering SoCs, image sensors, and CAN transceivers |
| Quiescent current | 10μA in AAM sleep mode - enables >1-year battery life in always-on vehicle telematics |
| Switching frequency | 350kHz to 2.5MHz - adjustable via FREQ resistor or external SYNC clock for EMI tuning |
| Feedback reference | 0.8V ±1.5% - enables precise output setting with standard resistor dividers |
| Min. on-time | 80ns - allows 36V→3.3V conversion at 2.5MHz without pulse-skipping |
| HS/LS RDS(on) | 90mΩ / 40mΩ - reduces conduction loss in high-current automotive applications |
| Thermal shutdown | 170°C with 20°C hysteresis - ensures safe operation during sustained overload or poor PCB thermal design |
Pinout & Package
MP4432GL-P is housed in a thermally enhanced QFN-16 (3mm × 4mm) package with exposed thermal pad, optimized for high-power density automotive and industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Drives high for in-phase, low for 180° out-of-phase sync with other MP4432 units to reduce input ripple |
| 2 VIN | Main input supply | Accepts 3.3–36V; powers internal circuitry and high-side switch; requires local ceramic decoupling |
| 3,10 SW | Switch node | Connects to inductor; carries high di/dt; must be routed with minimal loop area to limit EMI |
| 4,9 PGND | Power ground | High-current return path for power switches; requires solid copper pour and multiple vias to thermal pad |
| 5 EN | Enable control | Logic-level input (0.9–1.2V threshold); pulls low to enter 1μA shutdown mode |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz clock; high at startup forces CCM, low/floating enables AAM |
| 7 PG | Power good open-drain | Indicates ±10% output regulation after 30μs delay; requires external pull-up to VCC or bias rail |
| 8 BIAS | External bias supply | Accepts 5–18V to power internal regulator, reducing dissipation when VOUT ≥5V |
| 11 BST | Bootstrap supply | Charged via internal PMOS during LS-FET conduction; requires 0.1–1μF ceramic capacitor to SW |
| 12 VCC | Internal bias rail | 5V regulated output; supplies control logic and gate drivers; needs ≥1μF local decoupling |
| 13 AGND | Analog ground | Reference for FB, SS, and error amplifier; must be isolated from PGND except at single-point star ground |
| 14 SS | Soft-start timing | Charged by 10μA current source; sets ramp time via external capacitor to limit inrush current |
| 15 FB | Feedback input | Compares output voltage against 0.8V reference; connects to resistor divider from VOUT to AGND |
| 16 FREQ | Frequency programming | Resistor-to-ground sets oscillator frequency per RFREQ = 170000/fSW(kHz) kΩ |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Asynchronous Mode (AAM) | Reduces switching frequency under light load to maintain >85% efficiency at 1mA output, critical for always-on vehicle modules |
| Valley-current OCP with hiccup | Detects inductor current at zero-crossing to prevent runaway during overload; enters low-duty hiccup mode during short-circuit to limit average fault current |
| Low-dropout mode | Enables >95% duty cycle operation with BST refresh circuitry, supporting 36V→34V conversion during cold-crank |
| Programmable soft-start | Adjustable ramp time via external SS capacitor prevents inrush into large output capacitance (e.g., 1000μF camera power rails) |
| 180° phase-sync capability | Allows two MP4432GL-P units to share input current ripple, cutting required input capacitance by ~30% in dual-rail designs |
| BIAS pin support | Enables VOUT-derived biasing to eliminate VCC regulator loss, improving full-load efficiency by up to 2.5% in 12V→5V/3.3V cascaded supplies |
Applications
| Automotive Infotainment | ADAS Camera Module |
|---|---|
Use Scenario: Powering display controller, touch processor, and audio codec in head-unit systems with wide battery voltage variation. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying core logic rails; handles cold-crank dips to 4.5V without dropout. Use Value: 10μA AAM quiescent current extends battery backup runtime; 350kHz–2.5MHz frequency tuning avoids AM radio band interference. | Use Scenario: Generating clean 3.3V supply for CMOS image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Point-of-load regulator with tight output tolerance (±1%) and fast transient response for sensor pixel clock stability. Use Value: 80ns min-on-time supports 12V→3.3V at 2.5MHz, minimizing output filter size; PG signal validates rail before sensor initialization. |
| Industrial IoT Gateway | Telematics Control Unit (TCU) |
Use Scenario: Providing isolated 3.3V and 5V rails for ARM Cortex-M7 MCU, LTE modem, and RS-485 transceivers in harsh factory environments. IC Role / Device Role / Timing Role: Main system power IC with robust OCP and thermal shutdown; operates continuously across -40°C to +125°C junction temperature. Use Value: Valley-current OCP prevents false triggering during motor drive EMI; QFN-16 package enables compact 2-layer PCB layout. | Use Scenario: Supplying 3.3V to GNSS receiver, cellular baseband, and CAN FD controller in vehicle connectivity modules. IC Role / Device Role / Timing Role: High-reliability buck converter with power-good sequencing and pre-bias start-up for hot-swap capable TCU designs. Use Value: Pre-bias start-up avoids reverse current into powered VOUT; BIAS pin allows efficient 5V→3.3V local regulation from modem rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | Higher 4A rating, fixed 500kHz/2.1MHz freq, no AAM, 15μA IQ | Better for high-current industrial loads; lacks automotive cold-crank support and light-load efficiency optimization | Select when output current >2.5A is required and EMI filtering is handled externally |
| TPS543620RJER | 3.5A rating, 400kHz–3.5MHz freq, 12μA IQ, no BIAS pin, lower VIN min (3V) | Wider frequency range aids EMI compliance; missing BIAS pin limits efficiency in cascaded architectures | Prefer for cost-sensitive consumer electronics where 36V max VIN is not required |
Compared with LM61480RQWR and TPS543620RJER, MP4432GL-P uniquely balances ultra-low 10μA light-load IQ, 36V automotive input tolerance, and BIAS-enabled efficiency scaling-making it optimal for battery-backed, space-constrained vehicle subsystems requiring long-term reliability.
Availability
MP4432GL-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial IoT gateways requiring stable component supply across extended temperature and lifecycle demands.
Supply support for MP4432GL-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 MP4432 product line targets automotive and industrial DC/DC conversion where wide input range, low quiescent current, and robust protection are mandatory-designed specifically for harsh-environment power management in vehicles and edge equipment.
FAQ
What is the minimum recommended input voltage for reliable startup?
The MP4432GL-P has a VIN under-voltage lockout (UVLO) rising threshold of 2.4V–3.2V with 150mV hysteresis. Reliable startup occurs at ≥3.3V input, as specified in operating conditions. Below this, internal regulation fails and the device remains disabled even if EN is asserted.
Can the MP4432GL-P operate without an external bootstrap capacitor?
No. A 0.1μF–1μF ceramic capacitor between BST and SW is mandatory. Without it, the high-side gate driver cannot generate sufficient gate voltage, causing immediate failure of HS-FET turn-on and loss of regulation.
How does the PHASE pin affect synchronization in multi-device configurations?
When two MP4432GL-P units share the same SYNC clock, driving PHASE high on one and low on the other forces 180° phase offset. This interleaves their switching edges, halving peak input current and allowing smaller bulk input capacitors in high-power systems.
Is the BIAS pin required for normal operation?
No. BIAS can be left floating or tied to AGND if unused. However, connecting it to a stable 5–18V rail (e.g., VOUT of a prior stage) bypasses the internal VCC regulator, reducing thermal stress and improving full-load efficiency by up to 2.5%.
What happens during pre-bias start-up if the output already has voltage applied?
If VFB > VSS at startup, both HS- and LS-FETs remain off until VSS rises above VFB. This prevents reverse current flow into a pre-charged output, protecting downstream components and avoiding uncontrolled inrush through body diodes.
Does the MP4432GL-P support forced continuous conduction mode (CCM) at all load levels?
Yes. Driving SYNC high before startup forces fixed-frequency CCM regardless of load. This eliminates frequency modulation artifacts but reduces light-load efficiency compared to AAM. Once enabled, SYNC can be reconfigured dynamically during operation.
What is the maximum allowable thermal resistance θJA for continuous 2.2A operation at +85°C ambient?
With θJA = 48°C/W and TJ(MAX) = 150°C, the maximum allowable power dissipation is (150 − 85)/48 ≈ 1.35W. At 2.2A output with typical losses (~1.1W at 12V→3.3V), this requires adequate copper area and thermal vias beneath the QFN-16 exposed pad.
MP4432GL-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-PowerVQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V, 3.8V, 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 2.2A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x4)
MP4432GL-P FAQ
1.How can I place an order for MP4432GL-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4432GL-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 MP4432GL-P reliable?
The price and inventory of MP4432GL-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4432GL-P is usually 5 days.
3.What payment methods are accepted for MP4432GL-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4432GL-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4432GL-P?
MP4432GL-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4432GL-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 MP4432GL-P?
For technical support, including MP4432GL-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4432GL-P requirements.
6.How does Aetrix verify that MP4432GL-P is sourced from the original manufacturer or authorized distributors?
All MP4432GL-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 MP4432GL-P meets industry standards.
7.What is the process for return or replacement of MP4432GL-P?
All MP4432GL-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4432GL-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 MP4432GL-P part is unused and in its original packaging.
Return procedure for MP4432GL-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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