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Monolithic Power Systems Inc. MPM3530GRF
- Part No.:
- MPM3530GRF
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 47-PowerBQFN Module
- Datasheet:
-
MPM3530GRF.pdf
- Description:
- DC DC CONVERTER 1-15V
- Quantity:
- Payment:
- Shipping:
Inventory:940
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Product details
Overview
MPM3530GRF from Monolithic Power Systems is a fully integrated 55V input, 3A step-down DC/DC power module in QFN-47 (10mm×12mm×4mm) package. It integrates monolithic converter, power inductor, input capacitors, and compensation components. Features peak-current-mode control, valley-current OCP, auto-recovery thermal shutdown, and 1V–15V adjustable output - used in industrial power systems requiring compact, high-efficiency regulation under wide input voltage range.
For engineers reviewing the MPM3530GRF datasheet, MPM3530GRF pinout, MPM3530GRF application, or MPM3530GRF equivalent, key selection criteria include its 4.5–55V input range, 92.3% peak efficiency, programmable 400–640kHz switching frequency via FREQ pin, light-load frequency scaling, and EN/PG/SS interface support for system-level power sequencing and fault monitoring.
Technical Context
The MPM3530GRF implements peak-current-mode PWM control with internal error amplifier comparing FB to 1.0V reference, generating COMP voltage to set HS-FET on-time. Valley-current detection enables robust over-current protection during short-circuit or startup conditions.
It features adaptive light-load operation: switching frequency scales down below 0.8V COMP to reduce switching loss, and LS-FET turns off at zero inductor current to eliminate reverse conduction loss. Thermal shutdown triggers at 170°C with 10°C hysteresis, and OVP latches at >110% VREF with PG assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V - supports wide industrial and telecom supply rails including 12V, 24V, 36V, and 48V nominal systems. |
| Output Current | 3A continuous - delivers full rated load without derating up to +85°C ambient with proper PCB layout and thermal management. |
| Output Voltage Range | 1V to 15V - set externally via resistor divider on FB pin; enables single-module reuse across multiple rail requirements. |
| Switching Frequency | 400–640kHz (typ. 520kHz at RFREQ=100kΩ) - balances efficiency, size, and EMI; supports external SYNC from 100kHz–1MHz. |
| Peak Efficiency | 92.3% at VOUT=3.3V, IOUT=2A, VIN=12V - reduces thermal load and improves system power density in space-constrained designs. |
| Thermal Shutdown | 170°C with 10°C hysteresis - auto-recovery after cooldown prevents permanent latch-off during transient overload or airflow interruption. |
| Feedback Reference | 1.00V ±2% - enables precise output regulation; FB pin current ≤50nA minimizes divider resistor power loss and noise sensitivity. |
Pinout & Package
MPM3530GRF uses a thermally enhanced QFN-47 package (10mm × 12mm × 4mm) with exposed thermal pad for PCB-level heat dissipation. Pin numbering follows top-view orientation per MPS package drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 42–44) | Primary input power supply | Supplies internal control circuitry and VDD regulator; requires low-ESR decoupling capacitor placed close to minimize switching noise injection. |
| PGND (Pins 2, 12–16, 30, 38, 41, 45, 46) | Power ground return | High-current return path for input and switch node; must be connected to solid ground plane with minimal impedance. |
| BST (Pin 3) | Bootstrap supply for HS-FET driver | Floats above SW; charges internal 0.1μF BST capacitor during LS-FET conduction; critical for high-side gate drive integrity. |
| SW (Pins 4–11) | Switch node output | Connects to integrated inductor; carries high di/dt; requires short, wide copper traces to reduce EMI and voltage overshoot. |
| OUT (Pins 17–28, 47) | Regulated output voltage node | Delivers 3A output; connects to output capacitor bank and load; wide trace routing essential for low IR drop and thermal performance. |
| EN (Pin 40) | Enable control input | Logic-level enable with 1.4–1.8V rising threshold; no internal pull-up/down - must be actively driven to avoid undefined state. |
| PG (Pin 31) | Open-drain power-good indicator | Asserts high when VOUT reaches 90% of target (e.g., 2.97V for 3.3V rail); pulled low on OVP/OCP/OTP faults. |
| FB (Pin 37) | Feedback input | Monitors output via resistor divider; 1.00V reference enables accurate regulation; <50nA bias current allows high-value dividers. |
| FREQ (Pin 39) | Frequency set/SYNC input | Sets switching frequency via resistor to AGND (400–640kHz), or accepts external clock (100kHz–1MHz) for EMI reduction. |
| SS (Pin 32) | Soft-start timing control | Default 1.2ms ramp time; extended by external capacitor; overrides internal reference during startup to limit inrush current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power inductor & input capacitors | Eliminates 4–6 external passive components; reduces BOM count and layout area while ensuring optimal magnetic coupling and ripple handling. |
| Valley-current over-current protection | Detects inductor current collapse during short-circuit events, preventing runaway current and enabling safe auto-recovery without latch-off. |
| Light-load frequency scaling | Reduces fSW proportionally as VCOMP drops below 0.8V, cutting switching losses and improving efficiency at <20% load without burst-mode noise. |
| Auto-recovery thermal shutdown | Shuts down at 170°C junction temperature and resumes operation at 160°C, avoiding system lockup during transient thermal overload. |
| EN/PG/SS interface compatibility | Supports standard power sequencing protocols: EN enables synchronized turn-on, PG confirms regulation, SS controls ramp rate for FPGA/CPU core rails. |
Applications
| Industrial PLC Power Supply | Telecom Base Station Bias Rail |
|---|---|
Use Scenario: Provides isolated 5V/3.3V bias for I/O modules and communication interfaces in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 3A output from 24V or 48V backplane; handles wide input transients and thermal cycling. Use Value: Integrated inductor and thermal pad simplify heatsinking; 55V rating accommodates 48V surge standards (IEC 61000-4-5); EN/PG enable safe hot-swap insertion. | Use Scenario: Generates 12V intermediate rail for RF power amplifiers and baseband processors in 4G/5G small cell equipment. IC Role / Device Role / Timing Role: High-efficiency step-down module converting 48V telecom supply to 12V with low output ripple and fast transient response. Use Value: 92.3% peak efficiency reduces cooling requirements in sealed enclosures; SYNC input aligns switching to system clock to suppress conducted EMI. |
| Medical Diagnostic Imaging PSU | Test & Measurement Instrumentation |
Use Scenario: Powers analog front-end and ADC subsystems in portable ultrasound and MRI console units requiring ultra-low noise and high reliability. IC Role / Device Role / Timing Role: Low-noise buck regulator supplying clean 1.2V/1.8V core rails; operates from battery-backed 24V input with tight line/load regulation. Use Value: 1% line/load regulation ensures stable reference for precision ADCs; integrated input caps suppress input ripple; meets EN55022 Class B emissions. | Use Scenario: Supplies variable 1–15V output for programmable DUT power in automated test equipment (ATE) and bench power supplies. IC Role / Device Role / Timing Role: Adjustable-output power module controlled via DAC-driven FB divider; supports dynamic voltage scaling during functional testing. Use Value: Wide 1–15V output range eliminates need for multiple fixed-output regulators; SS pin enables smooth voltage ramping between test steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down power module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RTM2430BZSP | 40V max input, 3A, 3.5mm height; uses different control architecture (constant-on-time) and lacks SYNC capability. | Lower input voltage ceiling limits use in 48V telecom; no external frequency sync restricts EMI optimization in dense layouts. | Select when board height <3.5mm is mandatory and input stays ≤40V; verify loop stability with COT control vs. peak-current mode. |
| TSM10550H | 55V input, 3A, but larger 12mm×12mm footprint; includes integrated telemetry (I²C) and digital programmability. | Enables remote configuration and health monitoring, but adds firmware dependency and increases design complexity. | Choose for smart power systems requiring real-time telemetry; avoid if analog-only control and minimal component count are priorities. |
Compared with RTM2430BZSP and TSM10550H, MPM3530GRF offers superior input voltage margin (55V), smaller footprint (10mm×12mm), and analog-friendly SYNC/SS/EN/PG interface - making it optimal for cost-sensitive, space-constrained industrial and telecom applications where deterministic analog control is preferred.
Availability
MPM3530GRF is available at Aetrix Electronics and suitable for industrial PLC power supplies, telecom base station bias rails, medical diagnostic imaging PSUs, and test & measurement instrumentation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for MPM3530GRF 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 and modules, headquartered in Kirkland, WA, with global design and support centers.
The MPM3530 product line delivers fully integrated, high-density DC/DC power modules targeting industrial, telecom, and medical applications where board space, thermal performance, and design simplicity are critical constraints.
FAQ
What is the maximum recommended PCB copper area for the exposed thermal pad of MPM3530GRF?
The exposed thermal pad (Pin 47) must be soldered to a minimum 100mm² solid copper pour connected to internal/external ground planes via ≥6 thermal vias (0.3mm diameter, spaced ≤1.5mm apart). This achieves θJA ≈17°C/W per JEDEC JESD51-7 testing and prevents junction temperature exceedance at full 3A load in still air.
Can MPM3530GRF operate with an input voltage below 4.5V?
No. The absolute minimum input voltage is 4.5V per datasheet specifications. Below this, UVLO prevents startup: VINUV_R = 3.9V (typ.), and operation is not guaranteed. Attempting sub-4.5V operation risks erratic behavior, failure to regulate, or damage due to insufficient gate drive for internal MOSFETs.
How does the valley-current OCP differ from standard cycle-by-cycle current limiting?
Valley-current OCP monitors inductor current at the end of each switching cycle. If valley current falls below a threshold (indicating potential saturation or short-circuit), the controller inhibits next HS-FET turn-on until valley current recovers. This prevents cumulative current buildup during sustained overload - unlike peak-current limiting alone, which only truncates individual cycles.
Is external compensation required for stable operation of MPM3530GRF?
Yes. COMP pin (Pin 36) requires an external RC network (resistor in series with capacitor to AGND) to set loop bandwidth and phase margin. MPS recommends specific values based on output capacitance and ESR; omitting or mis-sizing this network causes oscillation, poor transient response, or instability - especially with ceramic output capacitors.
Does MPM3530GRF support forced continuous conduction mode (FCCM)?
No. MPM3530GRF automatically enters discontinuous conduction mode (DCM) at light loads and scales switching frequency downward. It does not offer user-selectable FCCM mode; operation defaults to valley-switching DCM below ~20% load to maximize light-load efficiency without audible noise or output voltage ripple increase.
What is the purpose of the 900mV offset in the SS pin functionality?
The 900mV internal offset ensures SS is interpreted as "0V" until it rises above that threshold, allowing precise control of soft-start timing. SS internally ramps from 0.9V to 1.9V to override the 1.0V reference voltage - guaranteeing monotonic output voltage rise and eliminating regulation glitches during startup.
MPM3530GRF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 47-PowerBQFN Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 55V
- Voltage - Output 1:
- 1 ~ 15V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 3A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OTP, OVP, UVLO
- Operating Temperature:
- -40°C ~ 85°C
- Efficiency:
- 92.3%
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 47-QFN (12x10)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MPM3530GRF FAQ
1.How can I place an order for MPM3530GRF through Aetrix?
Please submit a Request for Quotation (RFQ) for MPM3530GRF 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 MPM3530GRF reliable?
The price and inventory of MPM3530GRF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPM3530GRF is usually 5 days.
3.What payment methods are accepted for MPM3530GRF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPM3530GRF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPM3530GRF?
MPM3530GRF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPM3530GRF 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 MPM3530GRF?
For technical support, including MPM3530GRF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPM3530GRF requirements.
6.How does Aetrix verify that MPM3530GRF is sourced from the original manufacturer or authorized distributors?
All MPM3530GRF 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 MPM3530GRF meets industry standards.
7.What is the process for return or replacement of MPM3530GRF?
All MPM3530GRF units undergo pre-shipment inspection (PSI). If there is an issue with MPM3530GRF, 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 MPM3530GRF part is unused and in its original packaging.
Return procedure for MPM3530GRF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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