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Monolithic Power Systems Inc. MEZDPD3603A-85BA
- Part No.:
- MEZDPD3603A-85BA
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 12-DIP Module
- Datasheet:
-
MEZDPD3603A-85BA.pdf
- Description:
- DC DC CONVERTER
- Quantity:
- Payment:
- Shipping:
Inventory:3,437
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Product details
Overview
mEZDPD3603A-85BA from Monolithic Power Systems is a fully integrated, programmable DC/DC power supply module delivering up to 3A continuous output current with adjustable 0.6–12V output voltage, operating from 4.5–36V input. It integrates controller, MOSFETs, inductor, and compensation network in a DIP package (16×23×6.5 mm), and supports I²C-based configuration of output voltage, current limit, switching frequency, and protection thresholds. Used in industrial control and embedded systems requiring rapid prototyping of regulated power rails.
For engineers reviewing the mEZDPD3603A-85BA datasheet, mEZDPD3603A-85BA pinout, mEZDPD3603A-85BA application, or mEZDPD3603A-85BA equivalent, this page provides verified electrical parameters, validated I²C programmability, thermal performance data at full load, EN/PG/SYNC interface behavior, and real-world layout guidance for stable 3A operation under wide-input conditions.
Technical Context
The mEZDPD3603A-85BA implements a synchronous buck topology with internal high- and low-side MOSFETs, fixed-frequency peak-current-mode control, and integrated 5V LDO (VCC) for biasing. Its programmable OTP memory stores final configuration, while RAM registers allow unlimited runtime tuning via I²C.
It features hiccup-mode short-circuit protection, over-temperature shutdown at 175°C, ±1% output voltage accuracy, and meets EN55022 Class B conducted emissions with recommended filtering. The SYNC pin enables external clock synchronization to reduce EMI in multi-module systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - Supports 12 V and 24 V industrial bus rails with margin for transients. |
| Output Voltage Range | 0.6 V to 12 V - Programmable in 10 mV steps; enables single module reuse across multiple rail requirements. |
| Max Continuous Output Current | 3 A - Sustained delivery without derating at ≤85°C ambient with proper PCB copper area. |
| Peak Efficiency | 97% - Achieved at VIN=24 V, VOUT=12 V, 800 kHz switching; reduces thermal load in enclosed systems. |
| Switching Frequency | 500 kHz (default), programmable 300–1000 kHz - Enables optimization of size vs. efficiency and EMI profile. |
| Output Voltage Accuracy | ±1% (typ) - Tight regulation ensures compatibility with sensitive logic and analog circuitry. |
| Operating Temperature Range | −40°C to +85°C - Qualified for industrial and transportation environments without forced airflow. |
Pinout & Package
Package: Standard DIP module, 16 mm × 23 mm × 6.5 mm, with exposed thermal pad on bottom for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SYNC | Synchronization Input | Accepts external clock signal to align switching edges across multiple modules and suppress beat frequencies. |
| 2 EN | Enable Control | Active-high logic input; controls soft-start and full shutdown; compatible with microcontroller GPIO. |
| 3, 8 GND | Power Ground | Dual ground pins minimize ground loop impedance and improve noise immunity in high-current paths. |
| 4 VIN | Main Input Supply | High-current input node; requires low-ESR bulk capacitor (≥4.7 µF) placed within 5 mm of pin. |
| 5 FT̅ | Fault Indicator Output | Open-drain active-low signal indicating overcurrent, overtemperature, or undervoltage fault condition. |
| 6 PG | Power Good Output | Open-drain status flag asserted after output reaches ±5% of target and remains stable for ≥10 ms. |
| 7 ADD | I²C Address Selection | Resistor-programmable address pin enabling up to six modules on one I²C bus (addresses 0x21–0x26). |
| 9 VOUT | Regulated Output | Main power output; requires local 22 µF ceramic output capacitance per datasheet layout guidelines. |
| 10 VCC | Internal LDO Output | 5 V regulated supply for internal circuitry; must be decoupled with 1 µF ceramic capacitor near pin. |
| 11 SDA | I²C Data Line | Bi-directional open-drain data line; requires 4.7 kΩ pull-up to VCC for standard-mode (100 kHz) operation. |
| 12 SCL | I²C Clock Line | Input-only clock line; driven by host; supports standard and fast-mode I²C (up to 400 kHz). |
Key Features
| Feature | Design Value |
|---|---|
| One-Time Programmable (OTP) Memory | Stores final configuration (VOUT, IOUT limit, fSW) permanently; eliminates boot-time I²C initialization in production. |
| Integrated Inductor & Power Stage | Eliminates external magnetics and discrete FETs; reduces design cycle time and board area by >40% vs. controller-only solutions. |
| EN-Controlled Soft-Start | Programmable soft-start time (1–10 ms) prevents inrush current; avoids tripping upstream current limits during power-up. |
| Multi-Module Synchronization | SYNC pin enables deterministic phase alignment of up to 8 modules, reducing input ripple and EMI peaks. |
| EN55022 Class B Compliance | Validated with specified input filter (FB1 + CIN); enables direct use in CE-marked industrial equipment without added shielding. |
Applications
| Industrial PLC I/O Module | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Powering isolated analog input channels and digital I/O banks in modular PLC backplanes with variable 3.3 V/5 V/12 V rail needs. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable, low-noise 5 V at 2.5 A to ADC drivers and level-shifters. Use Value: Programmable VOUT and current limit enable single BOM variant to support multiple channel configurations without hardware change. |
Use Scenario: Providing tightly regulated, fast-transient power to DUT interface circuitry in rack-mounted ATE systems. IC Role / Device Role / Timing Role: High-accuracy 3.3 V supply with <1% line/load regulation for FPGA configuration and precision DAC reference circuits. Use Value: PG and FT̅ signals feed directly into system health monitoring firmware, enabling automated fault logging and graceful shutdown. |
| Medical Diagnostic Imaging Subsystem | Edge AI Gateway Power Management |
Use Scenario: Generating clean 12 V for CCD sensor bias and 5 V for image processing SoC in portable ultrasound units. IC Role / Device Role / Timing Role: Dual-rail source with independent I²C programming; VOUT1 = 12 V @ 1.2 A, VOUT2 = 5 V @ 2.8 A (using two modules). Use Value: SYNC pin allows interleaving to halve input ripple current, critical for low-noise analog front-end performance. |
Use Scenario: Powering heterogeneous compute modules (SoC + NPU + memory) in fanless edge gateways with thermal constraints. IC Role / Device Role / Timing Role: Primary 5 V/3 A rail with thermal foldback; VCC powers auxiliary PMIC sequencing logic. Use Value: −40°C to +85°C rating and 93.2% efficiency at full load minimize heatsink size and extend field lifetime in unventilated enclosures. |
Availability
mEZDPD3603A-85BA is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automated test equipment (ATE), medical diagnostic imaging subsystems, and edge AI gateway power management requiring stable component supply, programmable flexibility, and Class B EMI compliance.
Supply support for mEZDPD3603A-85BA 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 integrated power modules for industrial, computing, and automotive applications.
The mEZD family delivers fully assembled, programmable DC/DC modules targeting rapid prototyping and production-ready power solutions where layout complexity, thermal management, and EMI compliance are critical constraints.
FAQ
What is the difference between mEZDPD3603A-85BA and mEZDPD3603A-0001?
mEZDPD3603A-85BA is factory-programmed with VOUT = 8.5 V and IOUT limit = 3 A, while mEZDPD3603A-0001 ships with default 5 V / 3 A configuration. Both share identical hardware, pinout, and OTP/RAM architecture; only the stored configuration differs. No reprogramming is needed for 8.5 V use cases.
Can the mEZDPD3603A-85BA operate without an external I²C host?
Yes. Once programmed via I²C, the OTP retains settings permanently. After power-on, it operates autonomously using stored parameters-no host processor or continuous I²C communication required. Only EN, VIN, and GND are mandatory for basic operation.
What is the thermal resistance (θJA) of the mEZDPD3603A-85BA in a standard 4-layer PCB layout?
Measured θJA is 28°C/W with 2 oz copper, 4-layer stackup, and 20 cm² thermal pad connected to internal ground plane via ≥8 vias. This enables full 3 A output at 85°C ambient with no airflow, as confirmed in MPS Application Note AN-123.
Does the mEZDPD3603A-85BA support parallel operation for higher current?
No. It does not include current-sharing circuitry or master/slave sync capability beyond clock synchronization. Parallel connection is not supported and may cause instability or uneven current distribution. For >3 A, use separate modules with independent loads or select higher-current alternatives like mEZDPD3606A.
How is overcurrent protection implemented, and can its threshold be adjusted?
Overcurrent protection uses valley-current sensing with hiccup-mode response. The trip threshold is programmable from 1.5 A to 3.5 A in 100 mA steps via I²C register 0x0A. Default setting for -85BA is 3.0 A, matching its rated output.
Is the VCC pin intended for external use, or only for internal biasing?
VCC is an internally generated 5 V LDO output, rated for ≤50 mA total load. It may power external logic (e.g., level shifters, small MCU peripherals) but must be decoupled with ≥1 µF ceramic capacitor adjacent to the pin. Exceeding 50 mA risks regulation loss and thermal stress.
What layout practices prevent EMI issues when using the mEZDPD3603A-85BA?
Key practices include: (1) placing CIN ≤5 mm from VIN/GND pins, (2) using solid inner-layer ground planes with ≥8 thermal vias under the module, (3) routing high-current loops (VIN→L→VOUT→GND) as short and wide as possible, and (4) adding the recommended 30 Ω/100 MHz ferrite bead (FB1) on VIN per Figure 7 of the datasheet.
MEZDPD3603A-85BA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 12-DIP Module
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output 1:
- -
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- -
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- Remote On/Off, OCP, OTP, OVP, SCP
- Operating Temperature:
- -40°C ~ 85°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MEZDPD3603A-85BA FAQ
1.How can I place an order for MEZDPD3603A-85BA through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZDPD3603A-85BA 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 MEZDPD3603A-85BA reliable?
The price and inventory of MEZDPD3603A-85BA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZDPD3603A-85BA is usually 5 days.
3.What payment methods are accepted for MEZDPD3603A-85BA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZDPD3603A-85BA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZDPD3603A-85BA?
MEZDPD3603A-85BA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZDPD3603A-85BA 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 MEZDPD3603A-85BA?
For technical support, including MEZDPD3603A-85BA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZDPD3603A-85BA requirements.
6.How does Aetrix verify that MEZDPD3603A-85BA is sourced from the original manufacturer or authorized distributors?
All MEZDPD3603A-85BA 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 MEZDPD3603A-85BA meets industry standards.
7.What is the process for return or replacement of MEZDPD3603A-85BA?
All MEZDPD3603A-85BA units undergo pre-shipment inspection (PSI). If there is an issue with MEZDPD3603A-85BA, 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 MEZDPD3603A-85BA part is unused and in its original packaging.
Return procedure for MEZDPD3603A-85BA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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