My Inquiry
My Account
Monolithic Power Systems Inc. MP4436GR-P
- Part No.:
- MP4436GR-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
MP4436GR-P.pdf
- Description:
- IC REG BUCK ADJ 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,217
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP4436GR-P from Monolithic Power Systems is a 45V, 6A synchronous step-down DC/DC converter with integrated high-side (48mΩ) and low-side (20mΩ) MOSFETs, 3.3–45V input range, and 1.7μA shutdown current-designed for automotive infotainment and ADAS power rails requiring cold-crank resilience and low EMI.
For engineers reviewing the MP4436GR-P datasheet, MP4436GR-P pinout, MP4436GR-P application, or MP4436GR-P equivalent, key selection criteria include configurable 350–530kHz switching frequency, selectable AAM/FCCM modes, 100ns minimum on-time, power-good signaling, and QFN-20 thermal performance under 125°C junction conditions.
Technical Context
This current-mode controller implements frequency foldback at startup to prevent inductor current runaway and supports multi-phase synchronization via SYNCIN/SYNCO with 180° phase shift. Its advanced asynchronous mode (AAM) reduces light-load quiescent current to 18μA while forced continuous conduction mode (FCCM) ensures fixed-frequency operation for EMI-sensitive designs.
The device integrates low-dropout mode for automotive cold-crank (VIN down to 3.3V), hiccup-mode over-current protection, and symmetric VIN routing for minimized EMI. Thermal shutdown triggers at 170°C with 20°C hysteresis, and the 0.815V feedback reference enables precise output regulation across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank (3.3V) and load-dump transients (45V) |
| Output Current | 6A continuous - delivers full rated current without derating at TA = 85°C with proper PCB copper area |
| Shutdown Current | 1.7μA - enables >10-year battery standby life in always-on vehicle modules |
| Switching Frequency | 350kHz to 530kHz - programmable via FREQ pin resistor; synchronizable to external clock for noise spreading |
| Feedback Reference | 0.815V ±1.0% - sets output voltage accuracy; enables 3.3V, 5V, or custom VOUT with resistor divider |
| Min 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 VREF - open-drain PG asserts high only when output is within tight regulation window |
Pinout & Package
MP4436GR-P is housed in a thermally enhanced QFN-20 (4mm × 4mm, 0.5mm pitch) package with exposed thermal pad. The package supports ≤23°C/W θJA on a 4-layer EVB and requires solder paste stencil design per JESD51-7 for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | Mode select | Pull high for FCCM (fixed frequency); pull low for AAM (light-load efficiency); must not float |
| 2 SYNCIN | External clock input | Accepts 350–530kHz signal; enables multi-phase sync or EMI reduction via external clock source |
| 3,12 VIN | Main input supply | Connects to bulk capacitor; decoupling required near pin to suppress switching noise |
| 4,5,10,11 PGND | Power ground | Low-impedance return path for high di/dt switch currents; tie directly to thermal pad |
| 6 BST | Bootstrap supply | Capacitor between BST and SW powers high-side gate driver; size determined by duty cycle and switching frequency |
| 7,8 SW | Switch node | Drives external inductor; high dv/dt node requiring short, low-inductance layout |
| 9 EN | Enable control | Active-high logic; 0.85V threshold rising edge enables regulator; 0.85V hysteresis prevents chatter |
| 13 SYNCO | Synchronization output | 180° out-of-phase clock for multi-phase interleaving; float if unused |
| 14 PG | Power good indicator | Open-drain output; requires external pull-up; asserts after soft-start and remains active only within ±7% VOUT tolerance |
| 15 ICS | Current share control | Parallel connection across phases improves load balancing; tie to VCC in single-phase use |
| 16 VCC | Bias supply | Internal LDO output; decoupling cap required to stabilize gate drivers and control circuitry |
| 17 AGND | Analog ground | Reference for FB, SS, MODE; separate from PGND to minimize noise coupling into feedback path |
| 18 FB | Feedback input | Monitors resistor divider; 0.815V reference enables accurate output setting; sensitive to trace noise |
| 19 SS | Soft-start timing | 6µA current source charges external capacitor; controls ramp rate and inrush limiting during startup |
| 20 FREQ | Frequency programming | Resistor-to-ground sets fSW; 62kΩ yields 470kHz typical; supports spread-spectrum option on MP4436A variant |
Key Features
| Feature | Design Value |
|---|---|
| Low-IQ sleep mode | 18μA quiescent current maintains battery runtime in always-on automotive modules without compromising wake-up response |
| Configurable conduction mode | Selectable AAM (efficiency-optimized) or FCCM (EMI-controlled) via MODE pin-no external components needed |
| Automotive-grade thermal protection | 170°C thermal shutdown with 20°C hysteresis ensures safe operation under sustained overload or poor heatsinking |
| Low-EMI architecture | Symmetric VIN routing, frequency spread spectrum (MP4436A), and out-of-phase SYNCO reduce peak radiated emissions per CISPR25 Class 5 |
| Robust cold-crank support | Low-dropout mode sustains regulation down to VIN = 3.3V, enabling uninterrupted operation during engine start |
Applications
| Automotive Infotainment | ADAS Camera Module |
|---|---|
Use Scenario: Powering head-unit SoC, display interface, and audio DSP from 12V battery with transient immunity. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter supplying core logic rails with <±1% load/line regulation. Use Value: 6A capability supports burst-mode CPU loads; 1.7μA shutdown extends parking-mode battery life beyond 30 days. | Use Scenario: Generating stable 3.3V rail for image sensor and ISP in forward-facing camera systems. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with fast transient response to sensor exposure changes. Use Value: 100ns min on-time enables 45V→3.3V direct conversion; AAM mode cuts idle power by 65% vs. FCCM. |
| Instrument Cluster | Industrial Telematics Gateway |
Use Scenario: Supplying MCU, TFT backlight driver, and CAN transceiver in digital dashboard with EMC compliance. IC Role / Device Role / Timing Role: Main 5V system rail with PG monitoring and synchronized switching to avoid display flicker. Use Value: SYNCO output enables interleaved multi-phase design; meets CISPR25 Class 5 radiated limits without shielding. | Use Scenario: Providing isolated 5V/3.3V rails for LTE modem, GNSS receiver, and microcontroller in fleet-tracking units. IC Role / Device Role / Timing Role: High-reliability DC/DC stage tolerant to wide ambient (-40°C to +105°C) and input ripple. Use Value: 45V max input withstands load-dump events; thermal shutdown prevents field failures in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436GR-A | Includes Frequency Spread Spectrum (FSS) for lower peak EMI; identical pinout and electrical specs | Better suited for CISPR25 Class 5 radiated emission compliance in compact enclosures | Select when EMI filtering area is constrained and spread-spectrum operation is acceptable |
| LM61460QWRNXTQ1 | 42V max input, 6A, 1.5μA shutdown current; uses different control architecture (COT) | Lacks multi-phase sync and out-of-phase clock output; higher light-load IQ (25μA) | Choose for TI ecosystem compatibility or where COT control simplifies loop compensation |
Compared with MPQ4436GR-A, the MP4436GR-P lacks FSS but offers identical thermal and efficiency performance; versus LM61460QWRNXTQ1, it provides superior multi-phase coordination and lower EMI without external filters, at the cost of vendor-specific toolchain support.
Availability
MP4436GR-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and instrument cluster designs requiring stable component supply with AEC-Q200-aligned reliability and long-term production continuity.
Supply support for MP4436GR-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 for automotive, industrial, and consumer markets, with global manufacturing and test partnerships.
The MP4436 product line targets high-reliability automotive power conversion, emphasizing cold-crank resilience, low EMI, and extended temperature operation-designed specifically for next-generation vehicle electronics demanding ASIL-ready subsystems.
FAQ
What is the maximum recommended PCB copper area for thermal performance in QFN-20?
The MP4436GR-P achieves θJA = 23°C/W on a 9cm×9cm, 4-layer evaluation board (EVQ4436-R-00A) with 2oz copper and thermal vias under the exposed pad. For production designs, allocate ≥250mm² of 2oz inner-layer copper connected via ≥9 thermal vias (0.3mm diameter) to maximize heat dissipation at 6A load.
Can MP4436GR-P operate with input voltage below 3.3V?
No. The absolute minimum operating VIN is 3.3V per datasheet specifications. Below this, UVLO disables the device. The 3.3V lower limit ensures reliable gate drive for internal MOSFETs and stable feedback regulation; operation at 3.0V is not characterized or guaranteed.
How does the MODE pin affect efficiency at 100mA load?
At 100mA load, AAM mode reduces total input current to ~18μA (sleep-mode IQ), yielding >85% efficiency at 12V→5V. FCCM mode draws ~9.5mA active IQ, dropping efficiency to ~72% under same conditions-making AAM essential for battery-powered standby operation.
Is external compensation required for stability?
No. MP4436GR-P uses internal compensation optimized for standard 3.3–4.7μH inductors and ceramic output capacitors. Stability is verified across 2.2μF–47μF output capacitance and ESR <5mΩ; no external RC network is needed unless using ultra-low-ESR polymer caps or non-standard inductors.
What is the purpose of the ICS pin in single-phase configuration?
In single-phase use, ICS must be tied to VCC (or VOUT) at ≥3V to disable current-sharing logic. Leaving ICS floating causes undefined behavior and potential startup failure. This pin is only active in multi-phase parallel configurations where ICS nodes are shorted to balance phase currents.
Does MP4436GR-P support dynamic output voltage adjustment?
No. The FB pin has a fixed 0.815V reference; output voltage is set statically by the external resistor divider. Dynamic adjustment would require an external DAC or voltage-controlled resistor network-neither supported natively nor characterized in the datasheet.
What is the recommended BST capacitor value for 470kHz operation?
A 0.1μF X7R ceramic capacitor is recommended between BST and SW for 470kHz operation. This value ensures sufficient charge hold-off during high-duty-cycle conditions (e.g., 45V→5V) while minimizing ringing; placement must be within 2mm of the BST/SW pins with low-inductance traces.
MP4436GR-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):
- 0.815V
- 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)
MP4436GR-P FAQ
1.How can I place an order for MP4436GR-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4436GR-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 MP4436GR-P reliable?
The price and inventory of MP4436GR-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4436GR-P is usually 5 days.
3.What payment methods are accepted for MP4436GR-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4436GR-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4436GR-P?
MP4436GR-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4436GR-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 MP4436GR-P?
For technical support, including MP4436GR-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4436GR-P requirements.
6.How does Aetrix verify that MP4436GR-P is sourced from the original manufacturer or authorized distributors?
All MP4436GR-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 MP4436GR-P meets industry standards.
7.What is the process for return or replacement of MP4436GR-P?
All MP4436GR-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4436GR-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 MP4436GR-P part is unused and in its original packaging.
Return procedure for MP4436GR-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP4436GR-P Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
