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Monolithic Power Systems Inc. MP4436AGR-P
- Part No.:
- MP4436AGR-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
MP4436AGR-P.pdf
- Description:
- IC REG BUCK ADJ 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:417
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Product details
Overview
MP4436AGR-P from Monolithic Power Systems is a 45V, 6A synchronous step-down DC/DC converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, configurable 350–530kHz switching frequency, and 1.7μA shutdown quiescent current. It delivers high efficiency across wide load ranges in automotive infotainment and ADAS power rails, supporting cold-crank operation via low-dropout mode.
For engineers reviewing the MP4436AGR-P datasheet, MP4436AGR-P pinout, MP4436AGR-P application, or MP4436AGR-P equivalent, key selection criteria include its AAM/FCCM mode selectability, 0.815V feedback threshold, 100ns minimum on-time, open-drain power-good output, and QFN-20 (4mm×4mm) thermal performance with θJA = 44°C/W.
Technical Context
This current-mode controller integrates dual power MOSFETs and supports external synchronization, multi-phase operation, and out-of-phase clock output for noise reduction. Its advanced asynchronous mode (AAM) scales switching frequency under light load to minimize gate and switching losses, while forced continuous conduction mode (FCCM) ensures fixed-frequency operation for EMI-sensitive designs.
The device implements hiccup-mode over-current protection, thermal shutdown at 170°C with 20°C hysteresis, and frequency foldback during start-up to prevent inductor current runaway. The 18μA sleep-mode IQ and symmetric VIN layout further optimize EMI and battery runtime in automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank (down to 3.3V) and load-dump transients. |
| Output Current | 6A continuous - enables single-chip power delivery for 5V/3.3V rails in ADAS camera modules and cluster displays. |
| Quiescent Current | 1.7μA in shutdown - preserves battery life in always-on vehicle subsystems. |
| Feedback Voltage | 0.815V ±8mV - sets precise output regulation with external resistor divider; enables 3.3V, 5V, or custom VOUT configurations. |
| Switching Frequency | 350–530kHz programmable via FREQ pin - balances efficiency, size, and EMI; synchronizable to external clock for system-level noise coordination. |
| Minimum On-Time | 100ns - supports high VIN-to-VOUT conversion ratios (e.g., 45V→3.3V) without pulse-skipping instability. |
| Power-Good Threshold | 93%–106% of nominal VOUT - provides reliable rail monitoring with 30μs delay; open-drain output requires external pull-up. |
Pinout & Package
MP4436AGR-P is housed in a thermally enhanced QFN-20 (4mm × 4mm) package with exposed thermal pad, rated MSL-1 and optimized for PCB heat dissipation (θJA = 44°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | Mode select | High = FCCM (fixed frequency); Low = AAM (light-load frequency scaling); must be tied-no floating. |
| 2 SYNCIN | External clock input | Accepts 350–530kHz signal for synchronization or multi-phase master; internal 51kΩ pull-down required if unused. |
| 3,12 VIN | Main input supply | Powers control circuitry and high-side switch; requires local ceramic decoupling to suppress switching noise. |
| 4,5,10,11 PGND | Power ground | Low-impedance return path for high-current SW node; must be connected directly to thermal pad and VIN capacitor ground. |
| 6 BST | Bootstrap supply | Drives high-side MOSFET gate; requires 0.1μF ceramic capacitor between BST and SW per design guidelines. |
| 7,8 SW | Switch node | Connection point for external inductor; carries high di/dt; layout critical for EMI and efficiency. |
| 9 EN | Enable control | Active-high logic (1V threshold); <0.85V disables regulator and reduces IQ to 1.7μA. |
| 13 SYNCO | Synchronized clock output | 180° out-of-phase with internal oscillator or SYNCIN; floats when unused-no pull-up/down needed. |
| 14 PG | Power-good indicator | Open-drain output signals valid regulation (±7% window); requires external pull-up to monitored rail or bias supply. |
| 15 ICS | Current-share node | Parallel connection across phases improves load balancing; tie to VCC/VOUT in single-phase designs. |
| 16 VCC | Bias supply | Internal LDO output (~4.9V); powers gate drivers and logic; requires 1μF ceramic capacitor to PGND. |
| 17 AGND | Analog ground | Reference for FB, SS, and internal error amplifier; separate from PGND to avoid noise coupling. |
| 18 FB | Feedback input | Monitors output via resistor divider; 0.815V reference enables accurate VOUT setting; sensitive to trace routing. |
| 19 SS | Soft-start timing | 6μA current source charges external capacitor; controls ramp rate and inrush current during startup. |
| 20 FREQ | Frequency programming | Resistor-to-ground sets fSW (e.g., 62kΩ → 470kHz); enables optimization for efficiency vs. size vs. EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 48mΩ HS + 20mΩ LS RDS(on) - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Low-Dropout Mode | Supports >90% duty cycle - maintains regulation during automotive cold-crank (VIN down to 3.3V) without dropout. |
| Frequency Spread Spectrum (FSS) | MP4436A variant only - reduces peak radiated emissions by spreading switching energy across narrow band, aiding CISPR25 Class 5 compliance. |
| Multi-Phase Capability | SYNCIN/SYNCO/ICS pins enable up to 4-phase interleaving - cuts input/output ripple current by up to 75%, easing filter design. |
| Hiccup-Mode OCP | Auto-retry protection after overcurrent - prevents thermal runaway during short-circuit events while enabling self-recovery. |
Applications
| Automotive Infotainment | ADAS Camera Module |
|---|---|
Use Scenario: Powering head-unit SoC, display backlight, and audio amplifiers in 12V/24V vehicle architectures. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator delivering stable, low-noise power with cold-crank support. Use Value: 1.7μA shutdown IQ extends battery life during ignition-off; AAM mode maintains >85% efficiency at 1mA load. | Use Scenario: Supplying image sensor, ISP, and interface ICs in forward-facing or surround-view cameras. IC Role / Device Role / Timing Role: High-efficiency, EMI-controlled 3.3V rail generator synchronized to system clock to avoid beat frequencies. Use Value: FSS option (MP4436A) and symmetric VIN layout reduce radiated emissions below CISPR25 Class 5 limits. |
| Instrument Cluster Display | Industrial Control HMI |
Use Scenario: Providing regulated 5V power to TFT LCD controllers, microcontrollers, and touch controllers in digital dashboards. IC Role / Device Role / Timing Role: Synchronous buck converter with PG output for system-level power sequencing and fault reporting. Use Value: Open-drain PG signal interfaces directly with MCU GPIO for real-time rail health monitoring and safe boot sequencing. | Use Scenario: Delivering robust 3.3V/5V power in DIN-rail mounted PLCs and human-machine interface panels operating from 24V industrial supplies. IC Role / Device Role / Timing Role: Wide-input buck regulator with thermal shutdown and hiccup OCP for unattended, long-life operation. Use Value: 170°C thermal shutdown with 20°C hysteresis prevents damage during sustained overload or poor heatsinking. |
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 |
|---|---|---|---|
| MPQ4436AGRE-A | Automotive-grade (AEC-Q100 Grade 1), same electrical specs plus extended temp range (−40°C to +125°C) and enhanced ESD (±8kV HBM). | Required for production automotive ECUs; not necessary for industrial or consumer prototypes. | Select when automotive qualification and higher reliability under temperature stress are mandatory. |
| LM61460QWRNRQ1 | TI part with 3.8V–36V input, 6A, 1.5μA shutdown IQ, but no FSS or multi-phase sync capability; uses different pinout and compensation scheme. | Lacks out-of-phase SYNCO and ICS for multi-phase; less suitable for noise-critical ADAS systems. | Choose for TI ecosystem compatibility or where spread-spectrum and phase interleaving are not required. |
Compared with MPQ4436AGRE-A, the MP4436AGR-P offers identical core regulation performance at lower cost and qualification overhead, while the LM61460QWRNRQ1 trades multi-phase flexibility for simpler loop compensation and broader vendor support-but lacks FSS and cold-crank robustness below 3.3V.
Availability
MP4436AGR-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial HMIs requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for MP4436AGR-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 a focus on efficiency, integration, and automotive-grade reliability.
The MP4436/MP4436A belongs to MPS's automotive-qualified DC/DC converter product line, designed specifically for demanding 12V/24V/48V vehicle subsystems where low IQ, EMI control, and cold-crank operation are essential.
FAQ
What is the difference between MP4436AGR-P and MP4436AGR?
The "-P" suffix denotes tape-and-reel packaging (per MPS ordering nomenclature), while MP4436AGR refers to the base part number. Both share identical electrical specifications, pinout, and thermal characteristics; only packaging format differs--P is reel-ready for automated assembly.
Can MP4436AGR-P operate with input voltage below 3.3V?
No. The absolute minimum operating VIN is 3.3V, with UVLO rising threshold at 3.0V (typical). Below this, the device remains disabled. It is not rated for sub-3.3V operation-even during cold-crank transients-unlike some competitors with 2.7V min ratings.
How is the switching frequency set using the FREQ pin?
A resistor from FREQ pin to GND sets fSW: e.g., 62kΩ yields 470kHz (typical). The relationship is non-linear and documented in the "fSW vs. RFREQ" curve (page 14 of datasheet). Values outside 10kΩ–100kΩ may cause instability or out-of-spec operation.
Does MP4436AGR-P require an external bootstrap diode?
No. The IC integrates bootstrap charging circuitry. Only a 0.1μF ceramic capacitor between BST and SW is required. Adding an external diode degrades efficiency and is unnecessary per MPS design guidelines.
What is the recommended PCB layout for thermal performance?
Maximize copper area connected to the exposed thermal pad (pin 21), use ≥6 thermal vias (0.3mm diameter) to inner ground planes, and keep PGND traces wide and direct. Thermal resistance drops from 44°C/W (JESD51-7) to 23°C/W on optimized 9cm×9cm 4-layer boards (EVQ4436-R-00A reference).
Is the FB pin compatible with resistive feedback networks using standard 1% tolerance resistors?
Yes. With 0.815V ±8mV reference tolerance and typical resistor tolerances, standard 1% metal-film dividers achieve ±1.5% output accuracy. For tighter regulation, use 0.1% resistors or add trimming capability via parallel capacitor on SS pin.
How does the MODE pin affect light-load efficiency?
In AAM (MODE = low), switching frequency decreases under light load, reducing gate and switching losses-yielding >85% efficiency at 1mA. In FCCM (MODE = high), fixed frequency maintains output ripple predictability but increases IQ to ~9.5mA at 470kHz, lowering light-load efficiency.
MP4436AGR-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 45V
- Current - Output:
- 6A
- Frequency - Switching:
- 350kHz ~ 530kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
MP4436AGR-P FAQ
1.How can I place an order for MP4436AGR-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4436AGR-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 MP4436AGR-P reliable?
The price and inventory of MP4436AGR-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4436AGR-P is usually 5 days.
3.What payment methods are accepted for MP4436AGR-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4436AGR-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4436AGR-P?
MP4436AGR-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4436AGR-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 MP4436AGR-P?
For technical support, including MP4436AGR-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4436AGR-P requirements.
6.How does Aetrix verify that MP4436AGR-P is sourced from the original manufacturer or authorized distributors?
All MP4436AGR-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 MP4436AGR-P meets industry standards.
7.What is the process for return or replacement of MP4436AGR-P?
All MP4436AGR-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4436AGR-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 MP4436AGR-P part is unused and in its original packaging.
Return procedure for MP4436AGR-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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