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Analog Devices Inc./Maxim Integrated MAXM15465AMB+T
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- Part No.:
- MAXM15465AMB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- DC DC Converters
- Package:
- 10-SMD Module
- Datasheet:
-
MAXM15465AMB+T.pdf
- Description:
- DC DC CONVERTER 3.3V
- Quantity:
- Payment:
- Shipping:
Inventory:1,968
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Product details
Overview
The MAXM15465AMB+T 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, features ±1.5% feedback accuracy, 3.75ms soft-start, and delivers regulated output in a compact 2.6mm × 3mm × 1.5mm uSLIC™ package. It serves as a plug-and-play replacement for LDOs in industrial sensors and 4–20mA loop-powered systems.
For engineers reviewing the MAXM15465AMB+T datasheet, MAXM15465AMB+T pinout, MAXM15465AMB+T application, or MAXM15465AMB+T equivalent, key selection considerations include its fixed 3.3V output, 4.5–42V wide-input range, hiccup overcurrent protection, open-drain RESET output, and compliance with CISPR22 Class B emissions - all critical for space-constrained, high-reliability industrial power designs.
Technical Context
The MAXM15465AMB+T employs peak-current-mode control with internal compensation, enabling stable regulation using only ceramic input/output capacitors. Its fixed 3.3V output is set by internal feedback resistors (VFB-REG = 3.30V typ), eliminating external resistor networks.
It supports selectable PWM/PEM operation via the MODE pin, includes programmable EN/UVLO (1.215V typ rising threshold), and provides prebias startup capability. Robustness is ensured by hiccup-mode overcurrent protection, thermal shutdown at 166°C, and operation across –40°C to +125°C ambient temperature.
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 interface ICs in low-power edge nodes. |
| Switching Frequency | 550kHz typ - balances efficiency and component size; allows use of small external capacitors and minimal PCB area. |
| Soft-Start Time | 3.75ms - limits inrush current during power-up, preventing input rail droop and system reset events. |
| Shutdown Current | 2.2μA typ - supports ultra-low-power sleep modes in battery-backed or energy-harvesting applications. |
| Operating Temperature | –40°C to +125°C ambient - qualified for harsh environments including HVAC, motor controls, and outdoor enclosures. |
Pinout & Package
Package: 10-pin uSLIC™ (2.6mm × 3mm × 1.5mm, M102A3+2 outline), surface-mount, RoHS-compliant, with integrated inductor and thermal pad on underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - LX | Switching node | Internal connection to inductor and high-side/low-side MOSFETs; no external connection required - reduces EMI and layout sensitivity. |
| 2 - GND | Power ground | Primary return path for power and control circuits; must be connected to low-impedance ground plane per layout guidelines. |
| 3 - RESET | Open-drain power-good | Asserts low when FB falls below 92% of set point; pulled high externally to monitor output health before system initialization. |
| 4 - MODE | PFM/PWM mode select | Connect to GND for forced PWM; leave unconnected for automatic PFM/PWM transition - optimizes light-load efficiency. |
| 5 - OUT | Regulated output | 3.3V output terminal; connects directly to load capacitance and feedback network (internal for fixed version). |
| 6 - FB | Feedback input | Internally tied to 3.3V divider; not user-accessible in MAXM15465 - ensures factory-trimmed accuracy without external components. |
| 7 - VCC | Bias supply | 5V LDO output (4.75–5.25V) powered from VIN; supplies internal circuitry and can power external logic if current ≤30mA. |
| 8 - EN/UVLO | Enable/undervoltage lockout | Active-high enable with 1.215V typ rising threshold; disables regulator if input drops below UVLO threshold. |
| 9 - VIN | Main input supply | 4.5–42V input connection; requires local 1μF ceramic capacitor for stability and noise suppression. |
| 10 - NC | No connect | Not internally bonded - must remain unconnected per datasheet; no routing or thermal relief needed. |
Key Features
| Feature | Design Value |
|---|---|
| All-ceramic capacitor support | Eliminates electrolytic or tantalum capacitors - improves reliability, lifetime, and temperature stability in industrial deployments. |
| Internally compensated | Removes requirement for external compensation network - reduces BOM count, design iterations, and layout risk. |
| Prebias startup capability | Allows safe startup into precharged output rails - prevents reverse current flow and protects downstream circuitry. |
| CISPR22 Class B compliance | Meets conducted/radiated emission limits without external filtering - accelerates EMC certification for end equipment. |
| Hiccup overcurrent protection | Auto-recovering fault response - maintains system uptime during transient overload conditions without manual reset. |
Applications
| Industrial Sensors and Encoders | 4–20mA Current-Loop Powered Sensors |
|---|---|
Use Scenario: Powering rotary encoders and analog pressure transmitters in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering clean, stable voltage to sensor signal conditioning and ADC front-ends. Use Value: Wide 4.5–42V input accommodates fluctuating 24V industrial rails; ±1.5% output accuracy ensures precise sensor reference integrity. | Use Scenario: Supplying 3.3V logic and analog circuitry in loop-powered field instruments with limited headroom. IC Role / Device Role / Timing Role: Efficient step-down converter replacing linear regulators to minimize power dissipation within 3.5–36V loop compliance window. Use Value: 2.2μA shutdown current extends battery life in wireless HART-enabled transmitters; 300mA output supports active signal processing. |
| LDO Replacement | HVAC and Building Control |
Use Scenario: Upgrading legacy 3.3V LDO-based power domains in smart thermostats and zone controllers. IC Role / Device Role / Timing Role: High-efficiency drop-in replacement for inefficient linear regulators, reducing thermal load on densely packed PCBs. Use Value: 90%+ efficiency at full load cuts board-level heat generation by >70% vs. typical LDOs - enabling smaller enclosures and passive cooling. | Use Scenario: Powering communication interfaces (RS-485, CAN) and microcontrollers in HVAC zone actuators and damper controllers. IC Role / Device Role / Timing Role: Robust 3.3V supply tolerant of automotive-grade voltage transients and long cable runs from central power supplies. Use Value: –40°C to +125°C operation and thermal shutdown ensure reliability in attic-mounted units; CISPR22 compliance avoids interference with wireless building management radios. |
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+T | Fixed 5V output; identical package, pinout, and electrical specs except FB voltage (5.00V vs. 3.30V). | Used where 5V logic or USB-peripheral interfacing is required instead of 3.3V MCU cores. | Select MAXM15466AMB+T only when system architecture mandates 5V output - no PCB change needed due to pin compatibility. |
| TPSM84203RMLR | 3.3V fixed output, 3A rating, larger 7.5mm × 7.5mm QFN; higher quiescent current (15μA vs. 2.2μA); no PFM mode. | Suitable for higher-current applications but over-specified for 300mA loads; less efficient at light loads. | Choose TPSM84203RMLR only if future-proofing for >500mA loads is required - otherwise MAXM15465AMB+T offers superior size, efficiency, and low-IQ. |
Compared with MAXM15466AMB+T, the MAXM15465AMB+T provides identical integration and footprint but targets 3.3V logic domains; versus TPSM84203RMLR, it delivers 1/10th the solution size and 1/7th the quiescent current - making it optimal for space- and energy-constrained industrial edge nodes.
Availability
MAXM15465AMB+T 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 support, and consistent parametric performance.
Supply support for MAXM15465AMB+T 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, and communications markets.
The Himalaya uSLIC™ power module product line was engineered to replace discrete buck converters and LDOs with fully integrated, thermally optimized, EMC-compliant solutions for space-constrained industrial and IoT endpoints.
FAQ
What is the output voltage tolerance of the MAXM15465AMB+T?
The MAXM15465AMB+T provides a fixed 3.3V output with ±1.5% regulation accuracy over line, load, and temperature. This specification is guaranteed across –40°C to +125°C ambient, ensuring stable MCU core voltage even in extreme industrial environments. The MAXM15465AMB+T achieves this via factory-trimmed internal feedback resistors - no external components affect tolerance.
Does the MAXM15465AMB+T require external compensation components?
No, the MAXM15465AMB+T is fully internally compensated. Its peak-current-mode control architecture integrates all necessary compensation elements, allowing stable operation with only ceramic input and output capacitors. This eliminates external RC networks, reduces design risk, and shortens time-to-market - a key advantage of the MAXM15465AMB+T over controller-based buck solutions.
Can the MAXM15465AMB+T operate with a prebiased output?
Yes, the MAXM15465AMB+T supports prebias startup. When enabled, it safely ramps the output from an existing voltage without injecting reverse current into the load. This feature is confirmed in the datasheet's startup waveforms (e.g., toc57, toc63) and makes the MAXM15465AMB+T suitable for hot-swap and redundant power architectures where output rails may already be energized.
What is the purpose of the MODE pin on the MAXM15465AMB+T?
The MODE pin on the MAXM15465AMB+T selects between forced PWM and automatic PFM/PWM operation. When grounded, it forces continuous PWM mode for constant frequency and lowest noise; when left unconnected, the MAXM15465AMB+T automatically transitions to PFM at light loads to maintain high efficiency down to 1mA. This dual-mode flexibility is built into the MAXM15465AMB+T's control architecture.
Is the MAXM15465AMB+T compliant with electromagnetic compatibility standards?
Yes, the MAXM15465AMB+T meets CISPR22 Class B conducted and radiated emissions limits when used with the recommended filter components (0.1µF + 0.68µF input cap, 82µH choke, 1µF output cap), as verified in the datasheet's EMI plots (toc92, toc93). This compliance is intrinsic to the MAXM15465AMB+T's shielded uSLIC™ package and integrated layout - no additional shielding is required for most industrial applications.
MAXM15465AMB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-SMD Module
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAXM15465AMB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAXM15465AMB+T 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+T reliable?
The price and inventory of MAXM15465AMB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAXM15465AMB+T is usually 5 days.
3.What payment methods are accepted for MAXM15465AMB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAXM15465AMB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAXM15465AMB+T?
MAXM15465AMB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAXM15465AMB+T 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+T?
For technical support, including MAXM15465AMB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAXM15465AMB+T requirements.
6.How does Aetrix verify that MAXM15465AMB+T is sourced from the original manufacturer or authorized distributors?
All MAXM15465AMB+T 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+T meets industry standards.
7.What is the process for return or replacement of MAXM15465AMB+T?
All MAXM15465AMB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAXM15465AMB+T, 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+T part is unused and in its original packaging.
Return procedure for MAXM15465AMB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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