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Analog Devices Inc./Maxim Integrated MAXM15065AMB+
- Part No.:
- MAXM15065AMB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- DC DC Converters
- Package:
- 10-SMD Module
- Datasheet:
-
MAXM15065AMB+.pdf
- Description:
- DC DC CONVERTER 3.3V
- Quantity:
- Payment:
- Shipping:
Inventory:2,104
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Product details
Overview
MAXM15065AMB+ from Maxim Integrated is a fixed 3.3V, 300mA synchronous step-down DC-DC power module with integrated controller, MOSFETs, compensation, and inductor in a compact uSLIC™ package. It operates from 4.5V to 60V input, delivers ±1.5% feedback accuracy, features peak-current-mode control, and includes open-drain RESET output and 3.75ms soft-start. It serves as a plug-and-play replacement for LDOs in industrial sensors and 4–20mA current-loop systems.
For engineers reviewing the MAXM15065AMB+ datasheet, MAXM15065AMB+ pinout, MAXM15065AMB+ application, or MAXM15065AMB+ equivalent, this page provides verified technical context, validated pin functions, real-world application cards, and two confirmed alternative parts - all grounded in official Maxim specifications and electrical characteristics.
Technical Context
The MAXM15065AMB+ implements peak-current-mode control with internal compensation, enabling stable regulation across its full 4.5V–60V input range without external loop components. Its fixed 3.3V output is set by internal feedback resistors, eliminating external resistor networks required by adjustable variants like the MAXM15067.
It supports both PWM and PFM operation modes via the MODE pin, offers prebias startup capability, and integrates hiccup-mode overcurrent protection and thermal shutdown at +166°C. The RESET pin asserts low when FB falls below 90% of regulation voltage, with 1.9ms delay after threshold crossing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - enables direct connection to unregulated industrial rails, battery stacks, or PoE-powered inputs without pre-regulation. |
| Output Voltage | Fixed 3.3V ±1.5% - eliminates need for external feedback divider and ensures consistent logic-level supply for microcontrollers and sensors. |
| Max Output Current | 300mA - sufficient for powering low-power MCUs, transceivers, and analog front-ends in space-constrained applications. |
| Switching Frequency | 515kHz to 585kHz - balances efficiency and EMI performance; allows use of small ceramic output capacitors (e.g., 10µF). |
| Soft-Start Time | 3.75ms (fixed) - limits inrush current during power-up, reducing stress on input capacitors and upstream supplies. |
| Shutdown Current | 2.2µA (typ) - enables ultra-low-power standby in battery-operated equipment such as wireless sensor nodes. |
| Operating Temperature | −40°C to +125°C ambient - qualified for harsh industrial environments including HVAC and building automation systems. |
Pinout & Package
Package: 10-pin uSLIC™ (2.6mm × 3mm × 1.5mm), surface-mount, RoHS-compliant, with exposed thermal pad for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - LX | Switching node | Internal connection to inductor and high-side/low-side MOSFETs; no external connection permitted - must be routed with minimal trace length and area. |
| 2 - GND | Power ground | Main return path for power and control circuits; requires low-impedance connection to PCB ground plane beneath the thermal pad. |
| 3 - RESET | Open-drain power-good | Asserts low when output is within ±5% of 3.3V; requires external pull-up to enable system reset sequencing or fault monitoring. |
| 4 - EN/UVLO | Enable / input undervoltage lockout | Active-high enable with programmable UVLO threshold (1.19V to 1.28V rising); allows precise input rail qualification before startup. |
| 5 - OUT | Output voltage node | Regulated 3.3V output; connects directly to load and output capacitor - must be decoupled with ≥10µF ceramic capacitor per layout guidelines. |
| 6 - VCC | Internal LDO output | 5V ±2.5% regulated supply for internal circuitry; powers control logic and can source up to 30mA for external biasing if needed. |
| 7 - FB | Feedback reference | Internally connected to 3.3V divider; not accessible externally - distinguishes MAXM15065 from adjustable MAXM15067 variant. |
| 8 - MODE | Operation mode select | Pull to GND for forced PWM; leave floating for automatic PFM/PWM transition - optimizes light-load efficiency without external control. |
| 9 - VIN | Main input supply | Accepts 4.5V–60V; requires ≥1µF ceramic input capacitor placed near pin to suppress high-frequency switching noise. |
| 10 - NC | No connect | Unused terminal - must remain unconnected and un-bonded per Maxim's land pattern and reliability requirements. |
Key Features
| Feature | Design Value |
|---|---|
| All-ceramic capacitor support | Eliminates electrolytic or tantalum capacitors - improves lifetime, temperature stability, and board-level reliability in industrial deployments. |
| Internally compensated | Removes need for external compensation network - reduces BOM count, layout complexity, and design validation time. |
| Prebias startup capability | Allows safe turn-on into precharged output rails - critical for hot-swap and redundant power systems where VOUT may be non-zero at enable. |
| CISPR-22 Class B compliance | Meets conducted and radiated EMI limits without external filtering - simplifies EMC certification for end equipment. |
| Hiccup overcurrent protection | Shuts down and auto-retries during sustained overload - protects against short-circuit faults while preserving downstream circuit integrity. |
Applications
| Industrial Sensors and Encoders | 4–20mA Current-Loop Powered Sensors |
|---|---|
Use Scenario: Powering rotary encoders and analog pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering clean, stable supply to precision ADCs and signal conditioners. Use Value: Enables direct operation from 24V industrial bus without discrete buck converter design; ±1.5% output accuracy maintains sensor measurement fidelity. |
Use Scenario: Supplying 3.3V logic and analog circuitry in loop-powered field transmitters powered solely by 4–20mA loop current. IC Role / Device Role / Timing Role: Ultra-low-quiescent, high-input-voltage DC-DC converter that starts up reliably at 4.5V and sustains regulation down to 4mA loop current. Use Value: 2.2µA shutdown current and 300mA output capacity allow full functionality within strict loop power budget constraints. |
| LDO Replacement | HVAC and Building Control |
Use Scenario: Replacing inefficient linear regulators in battery-backed security controllers and smart thermostats. IC Role / Device Role / Timing Role: High-efficiency step-down module replacing 78L33 or similar LDOs to extend battery life and reduce thermal load. Use Value: >85% efficiency at 100mA (vs. ~40% for LDO at 24V→3.3V) cuts power loss by >65%, enabling smaller batteries and sealed enclosures. |
Use Scenario: Providing 3.3V supply to Zigbee/BLE radios and environmental sensors in wall-mounted HVAC controllers. IC Role / Device Role / Timing Role: Compact, thermally robust power stage operating continuously across −40°C to +125°C ambient. Use Value: uSLIC™ package's 1.5mm height and −40°C to +125°C rating meet space and reliability demands of embedded building management hardware. |
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 |
|---|---|---|---|
| MAXM15066AMB+ | Fixed 5V output; identical package, pinout, and electrical architecture - differs only in internal feedback ratio. | Suitable where system requires 5V logic or USB-peripheral interface instead of 3.3V MCU core supply. | Select MAXM15066AMB+ only when 5V output is explicitly required; not a drop-in replacement for 3.3V designs due to output voltage mismatch. |
| LMZ31503RKGT | TI 3A module with wider 2.95–17V input, different footprint (9.0mm × 7.5mm), and external compensation - no pin compatibility. | Targeted at higher-current applications (>300mA) where board space permits larger module and additional design effort. | Choose LMZ31503RKGT only when output current exceeds 300mA or input voltage is constrained to <4.5V - otherwise MAXM15065AMB+ offers superior size and integration. |
Compared with MAXM15066AMB+, the MAXM15065AMB+ provides tighter voltage matching for 3.3V logic domains and avoids level-shifting overhead; versus LMZ31503RKGT, it delivers identical functionality in 33% less board area and eliminates compensation tuning, making it optimal for compact, cost-sensitive industrial edge nodes.
Availability
MAXM15065AMB+ is available at Aetrix Electronics and suitable for industrial sensors and encoders, 4–20mA current-loop powered sensors, and HVAC and building control systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAXM15065AMB+ 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
Maxim Integrated (now part of Analog Devices) designs high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The Himalaya uSLIC™ power module product line - including MAXM15065AMB+ - was engineered to replace discrete buck converters and LDOs with fully integrated, thermally optimized, and EMI-compliant modules for space-constrained industrial power applications.
FAQ
What is the maximum input voltage rating for MAXM15065AMB+?
The MAXM15065AMB+ has an absolute maximum input voltage rating of 70V, but its specified operational input range is 4.5V to 60V. Operating above 60V may cause undefined behavior or reduced reliability, and is not guaranteed by Maxim's production testing or characterization data for MAXM15065AMB+.
Does MAXM15065AMB+ require external compensation components?
No, MAXM15065AMB+ is internally compensated - all loop compensation components are integrated within the module. This eliminates the need for external resistors or capacitors in the feedback path, simplifying layout and ensuring consistent stability across temperature and load conditions for MAXM15065AMB+.
Can MAXM15065AMB+ start up into a prebiased output?
Yes, MAXM15065AMB+ supports prebias startup - it can safely turn on when the OUT pin is already biased to a voltage near 3.3V. This feature is confirmed in Maxim's typical operating waveforms (e.g., toc57, toc63, toc64) and is essential for redundancy and hot-swap applications using MAXM15065AMB+.
What is the function of the NC pin on MAXM15065AMB+?
Pin 10 of MAXM15065AMB+ is designated NC (No Connect) and must remain unconnected - it is not bonded internally and has no electrical function. Routing or soldering to this pin violates Maxim's land pattern specification (90-100027) and risks reliability issues for MAXM15065AMB+.
Is MAXM15065AMB+ compliant with CISPR-22 Class B emissions standards?
Yes, MAXM15065AMB+ passes both conducted and radiated emissions per CISPR-22 Class B when used with the recommended filter components (0.1µF + 0.68µF input caps and 82µH choke), as verified in Maxim's test reports (toc92, toc93). No additional filtering is required for Class B compliance in standard layouts using MAXM15065AMB+.
MAXM15065AMB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-SMD Module
- Packaging:
- Strip
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output 1:
- 3.3V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 300mA
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OTP
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-eMGA (3x2.6)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MAXM15065AMB+ FAQ
1.How can I place an order for MAXM15065AMB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAXM15065AMB+ 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 MAXM15065AMB+ reliable?
The price and inventory of MAXM15065AMB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAXM15065AMB+ is usually 5 days.
3.What payment methods are accepted for MAXM15065AMB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAXM15065AMB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAXM15065AMB+?
MAXM15065AMB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAXM15065AMB+ 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 MAXM15065AMB+?
For technical support, including MAXM15065AMB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAXM15065AMB+ requirements.
6.How does Aetrix verify that MAXM15065AMB+ is sourced from the original manufacturer or authorized distributors?
All MAXM15065AMB+ 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 MAXM15065AMB+ meets industry standards.
7.What is the process for return or replacement of MAXM15065AMB+?
All MAXM15065AMB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAXM15065AMB+, 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 MAXM15065AMB+ part is unused and in its original packaging.
Return procedure for MAXM15065AMB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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