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Monolithic Power Systems Inc. MPM3805GQB-25-Z
- Part No.:
- MPM3805GQB-25-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 12-PowerVFQFN Module
- Datasheet:
-
MPM3805GQB-25-Z.pdf
- Description:
- DC DC CONVERTER 2.5V
- Quantity:
- Payment:
- Shipping:
Inventory:11,351
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Product details
Overview
MPM3805GQB-25-Z from Monolithic Power Systems is a fixed-output 2.5V, 0.6A synchronous step-down DC-DC power module with integrated inductor and MOSFETs in a QFN-12 (2.5mm×3.0mm×0.9mm) package. It operates from 2.5V to 6V input, delivers ±3% output accuracy at 10mA, features constant-on-time control for fast transient response, and includes power good (PG), enable (EN), and thermal shutdown protection. It is used in space-constrained portable SSD/HDD power rails.
For engineers reviewing the MPM3805GQB-25-Z datasheet, MPM3805GQB-25-Z pinout, MPM3805GQB-25-Z application, or MPM3805GQB-25-Z equivalent, key selection criteria include fixed 2.5V output tolerance, 17μA quiescent current, 2.5V–6V input range, 0.6A continuous load capability, PG/EN interface compatibility, and QFN-12 thermal performance in compact embedded systems.
Technical Context
The MPM3805GQB-25-Z implements a constant-on-time (COT) control architecture with input voltage feed-forward to maintain stable 2800–4200 kHz switching frequency across input and load variations. Its internal 0.47μH inductor and matched 110mΩ/70mΩ P/N-FET pair enable high-efficiency regulation without external magnetics.
It integrates cycle-by-cycle over-current protection (1.0A limit), hiccup-mode short-circuit recovery, thermal shutdown at 150°C (30°C hysteresis), and a precision 2.5V ±3% output regulated via internal feedback reference - eliminating external resistor dividers required in adjustable versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% at 10mA; ensures stable I/O rail for 2.5V logic interfaces without external feedback components. |
| Max Output Current | 0.6A continuous; supports moderate-power FPGA I/O banks or SSD controller core logic without derating at TA ≤ 85°C. |
| Input Voltage Range | 2.5V to 6V; compatible with single-cell Li-ion (3.0–4.2V), USB 5V, or dual-cell alkaline inputs. |
| Quiescent Current | 17μA typical; enables >10-year battery life in always-on storage management circuits. |
| Switching Frequency | 2.8–4.2 MHz; allows use of small 10–22μF ceramic input/output capacitors and reduces EMI filter size. |
| Thermal Shutdown | 150°C with 30°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Power Good Threshold | ±10% FB window (i.e., 2.25–2.75V); provides reliable system power sequencing signal for host controllers. |
Pinout & Package
MPM3805GQB-25-Z uses a thermally enhanced QFN-12 package (2.5mm × 3.0mm × 0.9mm) with exposed thermal pad (pins 3–4 connected internally to SW node and tied to copper pour for heat dissipation). The package supports reflow soldering per JEDEC J-STD-020 and achieves θJA = 65°C/W on a 4-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 PGND | Power Ground Return | Primary high-current return path for input and output loops; must connect directly to large low-impedance ground plane. |
| 3, 4 NC | Internal SW Pad / Thermal Sink | Exposed copper pad tied to internal switch node; requires solder mask defined thermal pad and ≥4 vias to inner ground layers. |
| 5, 6 OUT | Regulated Output Rail | Delivers 2.5V to load; connects directly to output capacitor and load; trace width ≥0.5mm recommended for 0.6A. |
| 7 VIN | Unregulated Input Supply | Accepts 2.5–6V; requires 10μF ceramic decoupling capacitor placed within 2mm of pin for EMI suppression. |
| 8 PG | Open-Drain Power Good | Signals valid output when FB is within ±10%; internal 550kΩ pull-up to VIN; sinks ≥1mA at 0.4V low. |
| 9 EN | Enable Control Input | Active-high logic; enables device when >1.2V; internal 1MΩ pulldown ensures default disable on power-up. |
| 10 NC | Fixed-Output Feedback Terminal | No connection required; internal reference sets 2.5V; pin left unconnected per datasheet guidance. |
| 11 AGND | Analog Ground Reference | Separate ground for internal control circuitry; must tie to PGND at single point near IC to avoid noise coupling. |
| 12 OUT_S | Output Voltage Sense | Remote sensing input for improved load regulation; connect directly to load point if trace resistance >10mΩ. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor + MOSFETs | 0.47μH shielded inductor + 110mΩ/70mΩ P/N-FET pair eliminates external magnetics and reduces BOM count by ≥4 components. |
| Constant-On-Time Control | Enables <10μs load transient response and eliminates loop compensation design effort for stable operation across all input/load conditions. |
| Ultra-Low Quiescent Current | 17μA IQ enables >10-year shelf life in battery-backed storage modules and ultra-low-power IoT edge nodes. |
| 100% Duty Cycle Operation | Supports dropout mode down to VIN = VOUT (2.5V), enabling seamless operation during brown-out events in portable systems. |
| Comprehensive Protection | Includes cycle-by-cycle current limiting (1.0A), hiccup-mode short-circuit recovery, and thermal shutdown with hysteresis for robust field reliability. |
Applications
| SSD Power Rail | LDO Replacement |
|---|---|
Use Scenario: Powers NAND flash I/O interface and controller logic in 2.5-inch SATA SSDs with tight board area constraints. IC Role / Device Role / Timing Role: Primary 2.5V DC-DC regulator delivering 0.6A with <1% load regulation and fast transient response to burst write/read cycles. Use Value: Replaces discrete buck + inductor solution occupying >30mm² with a 7.5mm² total footprint, reducing layer count and improving thermal margin. | Use Scenario: Substitutes linear regulators in portable medical sensors where efficiency and thermal limits are critical. IC Role / Device Role / Timing Role: High-efficiency 2.5V supply replacing 3.3V-to-2.5V LDOs dissipating >300mW at 0.6A. Use Value: Cuts power loss by >70% versus LDO (from 480mW to <140mW), extending battery runtime and eliminating heatsink requirements. |
| Portable Instrument Core Logic | Space-Limited FPGA I/O Bank |
Use Scenario: Supplies 2.5V to microcontroller peripherals and ADC reference in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise, tightly regulated 2.5V rail with PG signaling for controlled boot sequence and fault detection. Use Value: Achieves ±3mV line/load regulation and <10mV ripple, meeting 12-bit ADC reference stability requirements without post-regulation filtering. | Use Scenario: Powers 2.5V I/O banks on Xilinx Artix-7 FPGAs in compact industrial gateways. IC Role / Device Role / Timing Role: Compact, thermally efficient point-of-load regulator supporting dynamic I/O current up to 0.6A with <5μs transient recovery. Use Value: Enables placement directly adjacent to FPGA BGA package, minimizing IR drop and ensuring timing-critical I/O voltage compliance under fast load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output DC-DC module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSM1052-2.5 | Fixed 2.5V output, 0.5A max, 2.7–5.5V input, no PG pin, larger 3.0mm×3.0mm package. | Lacks power sequencing support; unsuitable for systems requiring coordinated power-up/down with host processor. | Select only if PG signal is unused and board area allows 25% larger footprint. |
| RT6220BGQW | Adjustable 0.6–5.5V output, 0.6A, 2.5–5.5V input, includes soft-start and PG, but requires external inductor/resistors. | Higher design complexity and BOM count; not drop-in replacement due to external component dependencies. | Choose only when output voltage flexibility outweighs layout simplicity and time-to-market goals. |
Compared with TSM1052-2.5 and RT6220BGQW, MPM3805GQB-25-Z uniquely combines fixed 2.5V accuracy, integrated inductor, PG/EN interface, and minimal 7.5mm² solution size-making it optimal for volume production of space-constrained, sequenced-power embedded storage and instrumentation.
Availability
MPM3805GQB-25-Z is available at Aetrix Electronics and suitable for SSD power rails, portable instrument core logic, and FPGA I/O bank regulation requiring stable component supply, full lifecycle traceability, and RoHS-compliant manufacturing.
Supply support for MPM3805GQB-25-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, headquartered in Kirkland, WA, with global design and support operations.
The MPM3805 product line delivers fully integrated, surface-mount DC-DC modules targeting space- and efficiency-critical applications in portable electronics, storage, and industrial embedded systems.
FAQ
What is the maximum allowable input voltage for MPM3805GQB-25-Z?
The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.5V to 6V. Exceeding 6V risks permanent damage to internal MOSFETs and control circuitry, as confirmed by MPS absolute maximum ratings table. Sustained operation above 6V voids warranty and triggers immediate thermal shutdown.
Does MPM3805GQB-25-Z require external feedback resistors?
No. Unlike the adjustable MPM3805GQB variant, the -25-Z version has an internal 2.5V feedback reference and pin 10 is marked NC (no connection). External resistors are unnecessary and must not be installed, as they would disrupt regulation and potentially cause overvoltage.
How does the Power Good (PG) pin function in this fixed-output module?
PG is an open-drain output with internal 550kΩ pull-up to VIN. It asserts high when the regulated 2.5V output is within ±10% (2.25–2.75V); otherwise, it pulls low. This provides deterministic power sequencing for host processors and enables fault detection without external comparators.
Can MPM3805GQB-25-Z operate in 100% duty cycle mode?
Yes. It supports 100% duty cycle operation when VIN drops to or below 2.5V, maintaining regulation until input falls below UVLO threshold (2.15–2.48V). This enables graceful brown-out handling in battery-powered systems without output collapse.
What is the thermal performance of the QFN-12 package on a standard 4-layer PCB?
Measured per JESD51-7, the junction-to-ambient thermal resistance (θJA) is 65°C/W. With 1.9W max continuous power dissipation at 25°C ambient, the junction temperature rises ~124°C at full 0.6A load - well within the 150°C shutdown limit, provided minimum copper pour and via count guidelines are followed.
Is the OUT_S pin mandatory for proper operation?
No. OUT_S is optional remote sense input. For most applications with short, low-resistance traces (<10mΩ), connecting OUT_S to OUT provides no benefit. It should only be used when load placement causes >1% voltage drop between module output and load point, requiring closed-loop compensation.
What failure protections are built into MPM3805GQB-25-Z?
It includes cycle-by-cycle over-current protection (1.0A limit), hiccup-mode short-circuit recovery, thermal shutdown at 150°C (30°C hysteresis), and under-voltage lockout (UVLO) with 300mV hysteresis. All protections are internal, require no external components, and are validated per MPS reliability testing protocols.
MPM3805GQB-25-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):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output 1:
- 2.5V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 600mA
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OTP, UVLO
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-QFN (3x2.5)
- Control Features:
- Enable, Active High
- Approval Agency:
- -
- Standard Number:
- -
MPM3805GQB-25-Z FAQ
1.How can I place an order for MPM3805GQB-25-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPM3805GQB-25-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 MPM3805GQB-25-Z reliable?
The price and inventory of MPM3805GQB-25-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPM3805GQB-25-Z is usually 5 days.
3.What payment methods are accepted for MPM3805GQB-25-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPM3805GQB-25-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPM3805GQB-25-Z?
MPM3805GQB-25-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPM3805GQB-25-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 MPM3805GQB-25-Z?
For technical support, including MPM3805GQB-25-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPM3805GQB-25-Z requirements.
6.How does Aetrix verify that MPM3805GQB-25-Z is sourced from the original manufacturer or authorized distributors?
All MPM3805GQB-25-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 MPM3805GQB-25-Z meets industry standards.
7.What is the process for return or replacement of MPM3805GQB-25-Z?
All MPM3805GQB-25-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPM3805GQB-25-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 MPM3805GQB-25-Z part is unused and in its original packaging.
Return procedure for MPM3805GQB-25-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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