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Analog Devices Inc./Maxim Integrated MAXM17901AMB+T
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- Part No.:
- MAXM17901AMB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- DC DC Converters
- Package:
- 10-SMD Module
- Datasheet:
-
MAXM17901AMB+T.pdf
- Description:
- IC REG BUCK 3.3V 300MA 10EMGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,802
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Product details
Overview
The MAXM17901AMB+T from Maxim Integrated is a fixed-output 3.3V, 300mA synchronous step-down DC-DC power module with integrated controller, MOSFETs, compensation, and inductor. It operates from 4.5V to 24V input, features ±1.5% feedback accuracy, 4.1ms soft-start, and open-drain RESET output. It delivers regulated power for space-constrained industrial sensors and 4–20mA loop-powered devices.
For engineers reviewing the MAXM17901AMB+T datasheet, MAXM17901AMB+T pinout, MAXM17901AMB+T application, or MAXM17901AMB+T equivalent, key selection criteria include its fixed 3.3V output, uSLIC™ 10-pin 2.6mm × 3mm × 1.5mm package, peak-current-mode control, hiccup overcurrent protection, and -40°C to +125°C ambient operating range.
Technical Context
The MAXM17901AMB+T employs a peak-current-mode control architecture with internal slope compensation and fixed 500kHz switching frequency (typ). Its integrated 33µH inductor and fully compensated design eliminate external compensation components and support all-ceramic capacitor operation.
It implements programmable EN/UVLO threshold (1.215V typ rising), internal 5V LDO (VCC) with 4.18V UVLO, and a latched MODE pin that selects between forced-PWM (MODE = GND) or PFM (MODE floating) at power-up - with no runtime mode changes permitted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.5% regulation accuracy ensures stable rail for MCU I/O, ADC references, and sensor interfaces. |
| Input Voltage Range | 4.5V to 24V enables direct use across 5V, 12V, and 24V industrial bus systems without pre-regulation. |
| Max Output Current | 300mA continuous output supports typical loads of industrial encoders, low-power transceivers, and analog front-ends. |
| Switching Frequency | 500kHz ±35kHz allows compact filter design with minimal EMI impact while maintaining efficiency above 85% at mid-load. |
| Soft-Start Time | 4.1ms fixed soft-start prevents inrush current and output overshoot during power-up into capacitive loads. |
| RESET Threshold | Asserts low when FB falls below 92% of 3.3V (≈3.04V); releases high-impedance 2ms after FB rises above 95.5% (≈3.15V). |
| Shutdown Current | 2.2μA typical shutdown current enables ultra-low-power sleep modes in battery-backed systems. |
Pinout & Package
Package: 10-pin uSLIC™ (2.6mm × 3mm × 1.5mm, M102A3+2 outline), RoHS-compliant, surface-mount module with integrated inductor and thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LX | Switching node | Internal connection to inductor and MOSFET bridge; no external connection - must be routed with minimal loop area for EMI control. |
| 2 GND | Power ground | Main return path for input/output currents; requires low-impedance connection to PCB ground plane under module. |
| 3 RESET | Open-drain power-good | Signals valid output voltage; requires external pull-up resistor (e.g., 10kΩ to 3.3V or 5V) for system monitoring or sequencing. |
| 4 MODE | PFM/PWM selection | Latched at startup: grounded = forced PWM (fixed frequency); floating = PFM (higher light-load efficiency). |
| 5 OUT | Regulated output | 3.3V output node; connects directly to load and output capacitor (10µF ceramic recommended). |
| 6 FB | Feedback input | Connected internally to 3.3V output node; not externally configurable - distinguishes MAXM17901 from adjustable MAXM17903. |
| 7 VCC | Internal LDO output | 5V supply for internal circuitry; bypassed with ≥1µF ceramic capacitor to GND near pin. |
| 8 EN/UVLO | Enable/UVLO input | Active-high enable; threshold 1.215V (rising); used for controlled startup or input undervoltage lockout via resistor divider. |
| 9–10 VIN | Input power | Dual pins for low-impedance 4.5–24V input; must be shorted together and decoupled with ≥1µF ceramic capacitor close to pins. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated inductor & MOSFETs | Eliminates 6–8 external components (inductor, high/low-side FETs, drivers, compensation network), reducing BOM count and layout risk. |
| All-ceramic capacitor support | Enables compact, reliable designs without electrolytic or tantalum capacitors - critical for long-life industrial deployments. |
| Hiccup overcurrent protection | Enters 131ms timeout on sustained overload or short-circuit, then retries soft-start - protects against thermal runaway without latch-off. |
| CISPR-22 Class B compliance | Meets conducted/radiated EMI limits without external filtering in typical layouts, accelerating EMC certification for end equipment. |
| Prebias startup capability | Starts safely into an already charged output (e.g., multi-rail systems), avoiding reverse current or output discharge transients. |
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 modules. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering clean, stable voltage to sensor signal conditioning and microcontroller peripherals. Use Value: Compact uSLIC™ footprint saves board space in dense I/O modules; ±1.5% accuracy ensures consistent ADC reference and sensor excitation. | Use Scenario: Supplying auxiliary 3.3V rail for smart transmitter electronics powered solely by 4–20mA loop current. IC Role / Device Role / Timing Role: Efficient step-down converter extracting regulated 3.3V from limited loop power budget (≤3.5mA overhead allowed). Use Value: 2.2μA shutdown current and PFM mode extend operational headroom; wide 4.5–24V input accommodates loop voltage variations. |
| LDO Replacement | Battery-Powered Equipment |
Use Scenario: Replacing inefficient linear regulators (e.g., 12V-to-3.3V) in HVAC controllers to reduce heat and improve efficiency. IC Role / Device Role / Timing Role: High-efficiency synchronous buck replacing dropout-limited LDOs in thermally constrained enclosures. Use Value: >85% efficiency at 150mA eliminates heatsink requirement; 4.1ms soft-start prevents brownout during cold start. | Use Scenario: Powering wireless sensor nodes (BLE/Zigbee) and portable test instruments with single-cell Li-ion or dual-cell alkaline inputs. IC Role / Device Role / Timing Role: Primary 3.3V regulator supporting intermittent transmit/receive cycles and deep-sleep states. Use Value: Ultra-low 2.2μA shutdown current extends shelf life; PFM mode maintains >80% efficiency down to 1mA load. |
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 |
|---|---|---|---|
| MAXM17903AMB+T | Adjustable 0.9V–5V output; requires external FB resistor divider; identical pinout and package. | Suitable where flexible output voltage or future design reuse across multiple rails is required. | Select MAXM17903AMB+T only if adjustable output is needed - MAXM17901AMB+T offers lower BOM cost and simpler layout for fixed 3.3V. |
| TSM1033W | 3.3V fixed output, 300mA, 4.5–36V input; larger 3.5mm × 3.5mm × 1.6mm QFN; no integrated inductor. | Requires external inductor and compensation; higher layout complexity but wider input range. | Choose TSM1033W only if input exceeds 24V or if thermal performance under 125°C ambient requires larger package footprint. |
Compared with MAXM17903AMB+T, the MAXM17901AMB+T eliminates FB resistors and reduces component count; versus TSM1033W, it integrates the inductor and shrinks solution size by 40%, though with narrower input range.
Availability
MAXM17901AMB+T is available at Aetrix Electronics and suitable for industrial sensors and encoders, 4–20mA current-loop powered sensors, and battery-powered equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAXM17901AMB+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 targets space-constrained, thermally demanding applications requiring simplified DC-DC design with integrated magnetics and robust protection.
FAQ
What is the output voltage tolerance of the MAXM17901AMB+T?
The MAXM17901AMB+T provides a fixed 3.3V output with ±1.5% regulation accuracy over line, load, and temperature (-40°C to +125°C ambient). This specification is guaranteed by design and characterization, ensuring stable operation for sensitive analog and digital circuits without external trimming.
Does the MAXM17901AMB+T require external compensation components?
No, the MAXM17901AMB+T is internally compensated. Its peak-current-mode control architecture includes built-in compensation, enabling stable operation with only input and output ceramic capacitors - no external RC networks, op-amps, or compensation resistors are needed for standard applications.
Can the MAXM17901AMB+T start up into a prebiased output?
Yes, the MAXM17901AMB+T supports startup into a prebiased output in both PFM and forced-PWM modes. This prevents reverse current flow and avoids discharging the output capacitor - essential for multi-rail systems where other supplies may be active before the 3.3V rail powers up.
What protection features does the MAXM17901AMB+T include?
The MAXM17901AMB+T includes hiccup-mode overcurrent protection (131ms timeout), overtemperature shutdown (166°C junction trip), and open-drain RESET output with 92% undervoltage detection. These features ensure robust operation under fault conditions without requiring external supervision circuitry.
Is the MAXM17901AMB+T pin-compatible with the MAXM17903AMB+T?
Yes, the MAXM17901AMB+T and MAXM17903AMB+T share identical pinout, package (uSLIC™ M102A3+2), and footprint. The only functional difference is that MAXM17901AMB+T has FB internally tied to OUT for fixed 3.3V, while MAXM17903AMB+T requires external resistors for adjustable output - making them drop-in replacements for layout purposes.
MAXM17901AMB+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:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 24V
- Voltage - Output 1:
- -
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- -
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- -
- Features:
- -
- 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:
- -
MAXM17901AMB+T FAQ
1.How can I place an order for MAXM17901AMB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAXM17901AMB+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 MAXM17901AMB+T reliable?
The price and inventory of MAXM17901AMB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAXM17901AMB+T is usually 5 days.
3.What payment methods are accepted for MAXM17901AMB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAXM17901AMB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAXM17901AMB+T?
MAXM17901AMB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAXM17901AMB+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 MAXM17901AMB+T?
For technical support, including MAXM17901AMB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAXM17901AMB+T requirements.
6.How does Aetrix verify that MAXM17901AMB+T is sourced from the original manufacturer or authorized distributors?
All MAXM17901AMB+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 MAXM17901AMB+T meets industry standards.
7.What is the process for return or replacement of MAXM17901AMB+T?
All MAXM17901AMB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAXM17901AMB+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 MAXM17901AMB+T part is unused and in its original packaging.
Return procedure for MAXM17901AMB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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