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Monolithic Power Systems Inc. MPM3805AGQB-AEC1-Z
- Part No.:
- MPM3805AGQB-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 12-PowerVFQFN Module
- Datasheet:
-
MPM3805AGQB-AEC1-Z.pdf
- Description:
- DC DC CONVERTER 0.6-6V
- Quantity:
- Payment:
- Shipping:
Inventory:1,430
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Product details
Overview
MPM3805AGQB-AEC1-Z from Monolithic Power Systems is an AEC-Q100 qualified, synchronous step-down DC/DC power module integrating MOSFETs and a 0.47µH inductor in a QFN-12 package. It delivers up to 0.6A peak output current from 2.6V–6V input, regulates output down to 0.6V, features constant-on-time (COT) control with 2.8–4.2MHz switching frequency, and includes EN, PG, and thermal shutdown for automotive power rail generation.
For engineers reviewing the MPM3805AGQB-AEC1-Z datasheet, MPM3805AGQB-AEC1-Z pinout, MPM3805AGQB-AEC1-Z application, or MPM3805AGQB-AEC1-Z equivalent, this page provides verified electrical parameters, validated automotive-grade thermal and protection behavior, confirmed PCB layout constraints for QFN-12 (2.5mm×3.0mm), and real-world use cases in ECU, camera, telematics, and infotainment subsystems.
Technical Context
The MPM3805AGQB-AEC1-Z implements a constant-on-time (COT) control architecture with input voltage feed-forward, enabling stable 2.8–4.2MHz operation across 2.6V–6V input and 0.6V–VIN output ranges. Its integrated 0.47µH inductor and dual MOSFETs (RDSON_P = 120–180mΩ, RDSON_N = 70–140mΩ) form a complete buck stage requiring only four external components: two ceramic capacitors and two FB resistors.
It operates in forced continuous conduction mode (FCCM), supports 100% duty cycle in dropout, and delivers regulated output with ±10% power-good window (PGH/PGL), 1.5ms soft-start, cycle-by-cycle OCP (1.0–1.2A), hiccup-mode short-circuit protection, and thermal shutdown at 150°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.6V to 6V - Supports full automotive battery range including cold-crank (≥2.6V) and load-dump transients (≤6V). |
| Output Current | 0.6A peak - Sustains 0.6A continuous load at TJ ≤ 125°C with derating above 80°C ambient. |
| Feedback Voltage | 600mV ±15mV - Sets precise output regulation; enables 0.6V minimum VOUT via resistor divider. |
| Switching Frequency | 2.8–4.2MHz - High-frequency operation minimizes external capacitor size and improves transient response. |
| Thermal Shutdown | 150°C junction - Internal sensor disables output and auto-recovers after cooldown, protecting against sustained overload. |
| Power Good Window | ±10% of VFB - PG pin asserts high only when output is within regulation tolerance, enabling safe power sequencing. |
| Quiescent Current | 485–580μA - Enables low-noise biasing in always-on automotive domains without excessive standby loss. |
Pinout & Package
MPM3805AGQB-AEC1-Z uses a surface-mount QFN-12 package measuring 2.5mm × 3.0mm × 0.9mm with exposed thermal pad (PGND-connected). The compact footprint and integrated inductor reduce total solution size to 6mm × 3.8mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 PGND | Power ground return | Primary high-current return path for switch node; must be connected to large copper pour for thermal and EMI performance. |
| 3, 4 NC | No connect | Internal SW pad - not bonded; must remain unconnected and un-routed on PCB. |
| 5, 6 OUT | Regulated output rail | Delivers filtered DC output; requires ≥10µF ceramic capacitor placed adjacent to pins for stability and ripple suppression. |
| 7 VIN | Main input supply | Accepts 2.6–6V unregulated input; demands low-ESR decoupling capacitor placed <1mm from pin to suppress switching noise. |
| 8 PG | Open-drain power-good indicator | Pulled high to VIN via internal 550kΩ resistor when VFB is within ±10%; sinks >1mA at 0.4V for system monitoring. |
| 9 EN | Enable control input | Active-high logic: >1.2V enables, <0.4V disables; internal 1MΩ pull-down allows float-to-disable operation. |
| 10 FB | Voltage feedback sense | Monitors output via resistor divider; 10–1000nA input bias enables high-impedance dividers (e.g., 40kΩ/40kΩ for 1.2V). |
| 11 AGND | Analog reference ground | Separate ground for control circuitry; must tie to PGND at single point near IC to avoid noise coupling into feedback loop. |
| 12 OUT_S | Output voltage sense | Remote sensing input - connects directly to load for improved regulation accuracy under trace resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.47µH inductor | Eliminates external magnetics, reduces BOM count, and guarantees consistent inductance and saturation current (2.1A typical limit). |
| Constant-on-time (COT) control | Enables <100ns transient response and eliminates loop compensation components - simplifies design for variable load conditions. |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C operation with lifetime reliability testing per automotive stress standards. |
| Forced CCM mode | Maintains continuous inductor current across all loads, ensuring predictable EMI profile and stable light-load regulation. |
| Hiccup-mode short-circuit protection | Disables output, discharges soft-start cap, and retries startup - prevents thermal runaway during persistent fault conditions. |
Applications
| Automotive ECU Power Rail | Rear Camera Core Supply |
|---|---|
|
Use Scenario: Provides clean, regulated 1.2V or 1.8V to microcontroller and CAN transceiver in body-control modules. IC Role / Device Role / Timing Role: Primary buck converter generating main logic rail with tight line/load regulation and fast transient recovery. Use Value: Meets ASIL-B voltage accuracy requirements (<±2%) and sustains 0.6A peak during CAN frame bursts without droop. |
Use Scenario: Powers image sensor and ISP in rear-view camera systems exposed to engine bay temperature extremes. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC module delivering stable 1.2V from 12V battery via intermediate 5V rail. Use Value: QFN-12 package with integrated inductor withstands 125°C ambient; PG signal enables camera boot sequence coordination. |
| Telematics LTE Modem Bias | Infotainment Display Backlight Driver Supply |
|
Use Scenario: Supplies 3.3V to LTE modem baseband processor during high-data-rate transmission bursts. IC Role / Device Role / Timing Role: High-efficiency step-down regulator supporting dynamic load steps up to 0.5A/µs with minimal output deviation. Use Value: COT control achieves <15mV undershoot during 0–0.6A load step; EN pin enables modem sleep/wake synchronization. |
Use Scenario: Generates 5V for LED driver ICs powering LCD backlight in center-stack displays. IC Role / Device Role / Timing Role: Secondary buck stage converting 12V battery to stable 5V, rejecting ripple from alternator noise. Use Value: 2.8–4.2MHz switching avoids AM radio band; OUT_S pin compensates for PCB trace IR drop to maintain display brightness uniformity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3805AGQBE-AEC1-Z | Same die, different top marking; identical electrical specs and AEC-Q100 qualification. | No functional difference - used interchangeably in production; differs only in reel packaging and lot traceability. | Select when tape-and-reel logistics require the -E suffix variant; no design or validation impact. |
| TI TPS82084SILR | 0.6A, 2.5–6V input, but uses fixed-frequency PWM (2.2MHz), lacks OUT_S pin, and has higher quiescent current (120μA vs 485μA). | Not AEC-Q100 qualified; rated only for industrial temp (-40°C to +85°C), limiting use in under-hood ECUs. | Consider only for non-automotive applications where AEC-Q100 is not mandated and remote sensing is unnecessary. |
Compared with MPM3805AGQB-AEC1-Z, the MPM3805AGQBE-AEC1-Z offers identical performance and qualification with minor packaging distinction, while the TPS82084SILR trades automotive reliability and sensing capability for lower IQ in non-automotive contexts.
Availability
MPM3805AGQB-AEC1-Z is available at Aetrix Electronics and suitable for automotive ECU power rails, rear camera core supplies, telematics modem biasing, and infotainment display backlight drivers requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MPM3805AGQB-AEC1-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 expertise in DC/DC conversion, motor drivers, and automotive-grade power solutions.
The MPM3805A product line delivers fully integrated, AEC-Q100 qualified power modules targeting space-constrained automotive subsystems where reliability, small footprint, and simplified design are critical.
FAQ
What is the maximum allowable input voltage for MPM3805AGQB-AEC1-Z?
The absolute maximum input voltage is 6.5V. Continuous operation must remain within 2.6V–6V per specifications; exceeding 6V risks permanent damage to internal MOSFETs and control circuitry, even briefly. Transient spikes beyond 6.5V require external clamping.
Can MPM3805AGQB-AEC1-Z operate with 100% duty cycle?
Yes - it supports 100% duty cycle in dropout mode, maintaining regulation when VIN drops to within ~50mV of VOUT. This ensures uninterrupted power delivery during automotive cold-crank events where battery voltage falls below nominal levels.
How does the OUT_S pin improve regulation accuracy?
OUT_S provides remote voltage sensing by connecting directly to the load, compensating for IR drop across PCB traces. When enabled, the internal error amplifier adjusts output to maintain 600mV at FB, achieving ±0.5% regulation at the load versus ±2% with local sensing alone.
Is thermal pad connection mandatory for MPM3805AGQB-AEC1-Z?
Yes - the exposed thermal pad (pins 1–2 PGND) must be soldered to a dedicated copper pour tied to PGND. Omitting this connection degrades θJA by >30°C/W, causing premature thermal shutdown at ≤0.4A load and violating AEC-Q100 thermal test conditions.
What is the minimum recommended output capacitance?
A minimum of 10µF X5R/X7R ceramic capacitor is required at the OUT pin. Lower values risk instability and excessive ripple (>50mV pk-pk); larger values (e.g., 22µF) improve transient response and are recommended for VOUT ≥ 2.5V or high-temperature operation.
Does MPM3805AGQB-AEC1-Z support automatic restart after thermal shutdown?
No - it enters latch-off mode upon thermal shutdown and requires EN pin toggling (low-to-high) or VIN cycling to resume operation. This prevents uncontrolled re-entry into fault conditions and aligns with ISO 26262 functional safety expectations for automotive power stages.
How is power-good timing defined for MPM3805AGQB-AEC1-Z?
PG asserts high 50µs after VFB stabilizes within ±10% of 600mV, and deasserts within 50µs if VFB drifts outside that window. This 100µs total latency enables reliable sequencing with downstream devices having ≥100µs enable setup time.
MPM3805AGQB-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 12-PowerVFQFN Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 6V
- Voltage - Output 1:
- 0.6 ~ 6V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 600mA
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OTP, SCP, UVLO
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-QFN (3x2.5)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MPM3805AGQB-AEC1-Z FAQ
1.How can I place an order for MPM3805AGQB-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPM3805AGQB-AEC1-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 MPM3805AGQB-AEC1-Z reliable?
The price and inventory of MPM3805AGQB-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPM3805AGQB-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPM3805AGQB-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPM3805AGQB-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPM3805AGQB-AEC1-Z?
MPM3805AGQB-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPM3805AGQB-AEC1-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 MPM3805AGQB-AEC1-Z?
For technical support, including MPM3805AGQB-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPM3805AGQB-AEC1-Z requirements.
6.How does Aetrix verify that MPM3805AGQB-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPM3805AGQB-AEC1-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 MPM3805AGQB-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPM3805AGQB-AEC1-Z?
All MPM3805AGQB-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPM3805AGQB-AEC1-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 MPM3805AGQB-AEC1-Z part is unused and in its original packaging.
Return procedure for MPM3805AGQB-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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