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Analog Devices Inc./Maxim Integrated MAXM15465AMB+
- Part No.:
- MAXM15465AMB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- DC DC Converters
- Package:
- 10-SMD Module
- Datasheet:
-
MAXM15465AMB+.pdf
- Description:
- DC DC CONVERTER 3.3V
- Quantity:
- Payment:
- Shipping:
Inventory:4,251
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Product details
Overview
The MAXM15465AMB+ from Maxim Integrated is a fixed 3.3V, 300mA synchronous step-down DC-DC power module with integrated controller, MOSFETs, compensation, and inductor. It operates from 4.5V to 42V input, delivers ±1.5% feedback accuracy, employs peak-current-mode control, and features a 3.75ms soft-start. It is used in industrial sensors, 4–20mA loop-powered devices, and point-of-load regulation where compact, low-risk power delivery is critical.
For engineers reviewing the MAXM15465AMB+ datasheet, MAXM15465AMB+ pinout, MAXM15465AMB+ application, or MAXM15465AMB+ equivalent, key selection considerations include its 3.3V fixed output, 10-pin uSLIC™ package (2.6mm × 3mm × 1.5mm), -40°C to +125°C ambient operation, hiccup overcurrent protection, and open-drain RESET output with 95.5% rising threshold.
Technical Context
The MAXM15465AMB+ implements peak-current-mode control with internal compensation, enabling stable regulation across its full 4.5V–42V input range without external loop components. Its fixed 3.3V output is set by internal feedback resistors, eliminating external resistor networks while maintaining ±1.5% regulation accuracy over temperature and load.
It supports both PWM and PFM operation modes via the MODE pin, delivers up to 300mA continuous output current, and integrates robust protection including hiccup-mode overcurrent, thermal shutdown at 166°C, and input UVLO with programmable EN/UVLO threshold (1.19V to 1.28V rising). The 3.75ms soft-start limits inrush current during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 42V - enables direct connection to 12V, 24V, and 36V industrial bus rails without pre-regulation. |
| Output Voltage | Fixed 3.3V ±1.5% - eliminates need for external feedback resistors and simplifies layout for standard logic supply rails. |
| Max Output Current | 300mA - sufficient for powering microcontrollers, sensors, and analog front-ends in space-constrained systems. |
| Switching Frequency | 515kHz to 585kHz - balances efficiency, EMI, and external component size; supports CISPR-22 Class B compliance with minimal filtering. |
| Soft-Start Time | 3.75ms (typ) - prevents input inrush and ensures controlled VOUT ramp-up during power-on sequencing. |
| Operating Temperature | -40°C to +125°C ambient - qualified for harsh industrial and automotive under-hood environments. |
| Shutdown Current | 2.2μA (typ) - enables ultra-low-power standby in battery-backed or energy-harvesting applications. |
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 MOSFET drain; no external connection required - reduces layout sensitivity and EMI risk. |
| 2 - GND | Power ground | Primary return path for power and control circuits; must be connected to low-impedance PCB ground plane per layout guidelines. |
| 3 - RESET | Open-drain power-good | Asserts low when FB falls below 92% of target; releases high-impedance 1.9ms after FB rises above 95.5% - enables reliable system reset sequencing. |
| 4 - MODE | Mode selection | Drives PFM mode when unconnected (low quiescent current); forces PWM when pulled to GND - selectable efficiency vs. ripple trade-off. |
| 5 - OUT | Regulated output | 3.3V output node; connects directly to load and output capacitor - designed for all-ceramic capacitor support (no electrolytics needed). |
| 6 - FB | Feedback input | Internally tied to 3.3V divider; not user-accessible on MAXM15465 - eliminates external resistor network and associated tolerance errors. |
| 7 - VCC | Bias supply | 5V LDO output (4.75V–5.25V) powered from VIN; supplies internal circuitry - removes need for external bias rail. |
| 8 - EN/UVLO | Enable/UVLO input | Active-high enable with 1.19V–1.28V rising threshold; supports programmable undervoltage lockout - enables precise system-level power sequencing. |
| 9 - VIN | Main input supply | 4.5V–42V input connection; accepts wide industrial input ranges and transient surges up to 48V absolute max. |
| 10 - NC | No connect | Not internally bonded - must remain unconnected per datasheet; improves manufacturability and avoids unintended parasitics. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated inductor + controller + MOSFETs | Reduces bill-of-materials to only two external capacitors - eliminates inductor selection, layout tuning, and EMI filter design effort. |
| All-ceramic capacitor support | Enables use of small, reliable, long-life MLCCs instead of bulkier, less stable electrolytic or tantalum capacitors. |
| Programmable EN/UVLO threshold | Allows precise coordination with upstream supplies or battery voltage monitoring - avoids brown-out resets in multi-rail systems. |
| Hiccup overcurrent protection | Shuts down and auto-retries during overload - protects downstream loads and PCB traces without requiring manual reset or fuse replacement. |
| CISPR-22 Class B compliance | Meets conducted and radiated emissions limits with minimal external filtering (0.1µF + 0.68µF + 82µH), reducing certification risk and cost. |
Applications
| Industrial Sensors and Encoders | 4–20mA Current-Loop Powered Sensors |
|---|---|
Use Scenario: Powering rotary encoders and pressure transmitters mounted in factory automation equipment with limited board space and high ambient temperatures. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator converting 24V loop supply to clean, regulated logic voltage for sensor signal conditioning and digital interface ICs. Use Value: Delivers stable 3.3V at 300mA with ±1.5% accuracy over -40°C to +125°C, ensuring ADC reference stability and MCU core voltage integrity without derating. | Use Scenario: Supplying 3.3V to low-power sensor electronics within 4–20mA loop-powered field instruments where input power is derived entirely from the loop current. IC Role / Device Role / Timing Role: Efficient step-down converter extracting usable 3.3V rail from the narrow 4–20mA loop's variable voltage drop (typically 12–30V). Use Value: Achieves >85% efficiency at 10mA–300mA loads and draws only 2.2μA in shutdown - maximizes usable loop headroom and extends battery-free operation. |
| LDO Replacement | HVAC and Building Control |
Use Scenario: Replacing inefficient linear regulators in legacy designs where input-to-output differential exceeds 2V and thermal management is constrained. IC Role / Device Role / Timing Role: Drop-in synchronous buck replacement for 3.3V LDOs, accepting same 12V–24V input but delivering higher efficiency and lower thermal load. Use Value: Reduces power dissipation from >2W (LDO) to <0.3W (MAXM15465AMB+) at 300mA - eliminates heatsinks and enables smaller enclosures. | Use Scenario: Providing 3.3V to wireless thermostat controllers and zone-valve actuators deployed in unconditioned HVAC ductwork with wide ambient swings. IC Role / Device Role / Timing Role: Robust primary power supply handling 24V AC-derived rectified DC input with surge immunity and thermal resilience. Use Value: Qualified for -40°C to +125°C ambient and passes JESD22-B103/B104 shock/vibration tests - ensures reliability in mechanically stressed building infrastructure. |
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 |
|---|---|---|---|
| MAXM15466AMB+ | Fixed 5V output; identical package, pinout, and electrical specs except FB regulation voltage (4.93V–5.18V) and VCC dropout. | Used where 5V logic or USB-peripheral interfaces require native 5V supply - not interchangeable without board redesign. | Select MAXM15466AMB+ only when 5V output is required; MAXM15465AMB+ is not pin-compatible for 5V use cases. |
| RT6220AGQW | 3.3V fixed output, 600mA rating, 2.5mm × 2.5mm QFN-12; requires external inductor and compensation; no integrated RESET or MODE pin. | Suitable for higher-current applications needing more headroom, but increases design complexity and layout sensitivity. | Choose RT6220AGQW only if >300mA output or smaller footprint is mandatory; MAXM15465AMB+ offers faster time-to-market with full integration. |
Compared with MAXM15466AMB+, the MAXM15465AMB+ provides identical mechanical and thermal performance but targets 3.3V logic domains; compared with RT6220AGQW, it trades off current headroom for plug-and-play simplicity, reduced EMI risk, and guaranteed Class B compliance.
Availability
MAXM15465AMB+ is available at Aetrix Electronics and suitable for industrial sensors and encoders, 4–20mA loop-powered sensors, and HVAC and building control systems requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MAXM15465AMB+ 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 precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The Himalaya uSLIC™ power module product line was developed to deliver fully integrated, easy-to-use DC-DC solutions that eliminate inductor selection, reduce layout risk, and accelerate power system design for space- and reliability-constrained applications.
FAQ
What is the output voltage tolerance of the MAXM15465AMB+ over temperature and load?
The MAXM15465AMB+ guarantees ±1.5% feedback regulation accuracy across its full operating temperature range (-40°C to +125°C ambient) and full 0–300mA load range. This specification includes initial tolerance, line regulation, load regulation, and temperature drift - verified by production testing and characterization, not just typical values. The MAXM15465AMB+ achieves this without external trimming components due to laser-trimmed internal feedback resistors.
Does the MAXM15465AMB+ require external compensation components?
No, the MAXM15465AMB+ does not require external compensation components. It uses an internally compensated peak-current-mode control architecture optimized for its integrated inductor and MOSFETs. All necessary compensation is embedded in the die - users only need input and output ceramic capacitors. This eliminates loop stability analysis, phase-margin measurement, and layout-sensitive compensation network design typically required with controller-only ICs.
Can the MAXM15465AMB+ be used in battery-powered equipment with deep sleep modes?
Yes, the MAXM15465AMB+ is well-suited for battery-powered equipment with deep sleep modes. Its shutdown current is specified at 2.2μA (typical) and 4μA (maximum) when EN/UVLO is pulled low, minimizing battery drain during inactive periods. Combined with PFM mode operation (enabled by leaving MODE unconnected), it maintains high light-load efficiency - critical for extending runtime in intermittently active IoT sensors and portable instrumentation using the MAXM15465AMB+.
What is the purpose of the NC pin on the MAXM15465AMB+?
The NC (No Connect) pin on the MAXM15465AMB+ is not internally bonded and serves no electrical function. It must remain unconnected on the PCB per the datasheet layout guidelines. This pin exists for mechanical compatibility and manufacturing consistency across the Himalaya uSLIC™ family (e.g., MAXM15465/MAXM15466/MAXM15467 share the same 10-pin outline). Connecting or routing to the NC pin may introduce parasitic coupling or violate package reliability requirements for the MAXM15465AMB+.
How does the RESET output of the MAXM15465AMB+ behave during startup and fault conditions?
The RESET output of the MAXM15465AMB+ is an open-drain signal that remains low until the FB voltage rises above 95.5% of its nominal value (3.3V × 0.955 = 3.1515V), then transitions to high-impedance after a 1.9ms delay. During faults - such as output short-circuit, overtemperature, or severe input undervoltage - RESET pulls low again when FB drops below 92% of nominal (3.036V). This behavior provides precise power-good signaling and fault indication compatible with standard microcontroller reset inputs, and is fully characterized across temperature and process for the MAXM15465AMB+.
MAXM15465AMB+ 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):
- 42V
- 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, UVLO
- 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:
- -
MAXM15465AMB+ FAQ
1.How can I place an order for MAXM15465AMB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAXM15465AMB+ 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 MAXM15465AMB+ reliable?
The price and inventory of MAXM15465AMB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAXM15465AMB+ is usually 5 days.
3.What payment methods are accepted for MAXM15465AMB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAXM15465AMB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAXM15465AMB+?
MAXM15465AMB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAXM15465AMB+ 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 MAXM15465AMB+?
For technical support, including MAXM15465AMB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAXM15465AMB+ requirements.
6.How does Aetrix verify that MAXM15465AMB+ is sourced from the original manufacturer or authorized distributors?
All MAXM15465AMB+ 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 MAXM15465AMB+ meets industry standards.
7.What is the process for return or replacement of MAXM15465AMB+?
All MAXM15465AMB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAXM15465AMB+, 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 MAXM15465AMB+ part is unused and in its original packaging.
Return procedure for MAXM15465AMB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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