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Analog Devices Inc./Maxim Integrated MAXM17906AMB+
- Part No.:
- MAXM17906AMB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- DC DC Converters
- Package:
- 10-SMD Module
- Datasheet:
-
MAXM17906AMB+.pdf
- Description:
- DC DC CONVERTER 0.9-6.3V
- Quantity:
- Payment:
- Shipping:
Inventory:3,563
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Product details
Overview
MAXM17906AMB+ from Maxim Integrated is an adjustable-output, synchronous step-down DC-DC power module integrating controller, MOSFETs, compensation, and inductor in a single uSLIC™ package. It operates from 4.5V to 24V input, delivers up to 300mA output current, features ±1.5% feedback accuracy, 550kHz switching frequency, and 0.9V–6.3V programmable output voltage. It is used in battery-powered equipment and point-of-load regulation where compact, low-noise, plug-and-play power is required.
For engineers reviewing the MAXM17906AMB+ datasheet, MAXM17906AMB+ pinout, MAXM17906AMB+ application, or MAXM17906AMB+ equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across temperature, real-world efficiency curves, and direct alternatives for design-in decisions involving adjustable 300mA buck conversion in space-constrained industrial and sensor systems.
Technical Context
The MAXM17906AMB+ employs peak-current-mode control architecture with internal soft-start (3.75ms fixed), prebias startup capability, and hiccup-mode overcurrent protection. Its feedback loop uses an externally adjustable resistor divider to set output voltage between 0.9V and 6.3V, referenced to a precise 0.90V FB-regulation voltage (±1.5% tolerance).
It supports dual operation modes: PWM (fixed 550kHz) when MODE is grounded, or PFM (variable frequency, high light-load efficiency) when MODE is left floating. The open-drain RESET pin asserts low when FB falls below 92% of its target, with 1.9ms delay before release after FB rises above 95.5% - enabling reliable power-good sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 24V - supports wide industrial and battery-derived supplies including 12V and 24V rails. |
| Output Voltage Range | 0.9V to 6.3V - fully adjustable via external resistor divider; enables single-part support across multiple core/logic/I/O voltage domains. |
| Max Output Current | 300mA - sufficient for microcontrollers, sensors, and low-power FPGAs without external heatsinking. |
| Feedback Accuracy | ±1.5% - ensures tight output regulation under line/load/temperature variation, critical for ADC references and analog signal chains. |
| Switching Frequency | 550kHz (typ) - balances EMI performance and inductor size; fixed in PWM mode, variable in PFM mode. |
| Shutdown Current | 2.2μA (typ) - enables ultra-low quiescent power in always-on battery systems. |
| Operating Temp | −40°C to +125°C ambient - qualified for harsh industrial and automotive under-hood environments. |
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 bottom.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – LX | Switching node | Internal connection to inductor and high-side/low-side MOSFETs; no external connection permitted. |
| 2 – GND | Power ground | Primary return path for power and control circuits; must be connected to low-impedance PCB ground plane. |
| 3 – RESET | Open-drain power-good | Asserts low when output drops out of regulation; requires external pull-up for system monitoring or sequencing. |
| 4 – MODE | Operation mode select | GND = forced PWM; floating = automatic PFM/PWM transition; determines light-load efficiency vs. noise trade-off. |
| 5 – OUT | Regulated output | Delivers final DC output; connects directly to output capacitor and load; layout-sensitive for stability. |
| 6 – FB | Feedback input | Monitors output via resistor divider; sets regulation point; high-impedance input (±25nA leakage). |
| 7 – EN/UVLO | Enable & input UVLO | Active-high enable with programmable threshold (1.215V typ rising); disables module below VIN UVLO. |
| 8 – VIN | Main input supply | Accepts 4.5V–24V; powers internal circuitry and switching stage; requires local 1μF ceramic decoupling. |
| 9 – VCC | Bias supply output | 5V LDO output (4.75–5.25V) for external circuitry; current-limited to 50mA max. |
| 10 – NC | No connect | Not internally bonded; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated inductor + controller + MOSFETs | Eliminates external magnetics and gate-drive complexity; reduces BOM count and layout risk. |
| All-ceramic capacitor support | Enables compact, low-ESR output filtering without tantalum or electrolytic capacitors. |
| Internally compensated | Removes need for external compensation network; simplifies design and validation. |
| Programmable EN/UVLO threshold | Allows custom input undervoltage lockout and controlled power-up sequencing. |
| CISPR-22 Class B compliant | Meets conducted/radiated EMI limits without external filters in typical layouts. |
Applications
| Industrial Sensors and Encoders | 4–20mA Current-Loop Powered Sensors |
|---|---|
Use Scenario: Powering precision analog front-ends in factory-floor position encoders with 24V loop supply. IC Role / Device Role / Timing Role: Adjustable 3.3V or 5V PoL regulator delivering stable, low-noise supply to op-amps and ADCs. Use Value: ±1.5% output accuracy and <10mVpp ripple ensure sub-LSB error in 16-bit sensor measurements. | Use Scenario: Deriving regulated 3.3V or 5V from 4–20mA loop-powered nodes with limited headroom. IC Role / Device Role / Timing Role: Step-down converter accepting 7–36V loop-derived input to generate clean logic supply. Use Value: 4.5V min input enables operation down to ~7V loop drop; 2.2μA shutdown current extends battery life. |
| LDO Replacement | Battery-Powered Equipment |
Use Scenario: Replacing inefficient linear regulators in space-constrained IoT edge nodes. IC Role / Device Role / Timing Role: High-efficiency buck module replacing 3.3V LDOs with >200mV dropout. Use Value: Up to 92% efficiency at 300mA (vs. <50% for LDOs at 12V→3.3V) drastically extends runtime. | Use Scenario: Powering BLE/Wi-Fi MCUs and environmental sensors in portable handheld devices. IC Role / Device Role / Timing Role: Primary 1.8V/2.5V/3.3V supply sourced from single-cell Li-ion or two-cell alkaline. Use Value: PFM mode achieves >85% efficiency at 1mA load; 3.75ms soft-start prevents inrush into weak batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS826718SIPR | 3.0V–6.0V input, 1A output, 2.0mm × 2.5mm package, integrated inductor, 0.6V–5.5V adjustable output | Higher current rating but narrower input range; optimized for ultra-compact consumer wearables | Select when >300mA load or smaller footprint is required; verify thermal derating at full load. |
| LMZ21701SILT | 4.5V–17V input, 1A output, 3.5mm × 4.5mm package, 0.8V–6V adjustable output, external compensation | Larger footprint, higher current, requires external compensation components | Select when higher output current or design flexibility (e.g., custom loop response) is needed; accepts larger board area. |
Compared with TPS826718SIPR and LMZ21701SILT, the MAXM17906AMB+ offers superior input voltage range (up to 24V), tighter feedback accuracy (±1.5% vs. ±2%), and fully internal compensation - making it optimal for industrial 24V systems requiring minimal design effort and guaranteed stability.
Availability
MAXM17906AMB+ 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 consistent parametric performance across temperature.
Supply support for MAXM17906AMB+ 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 family - including MAXM17906AMB+ - was engineered to replace discrete buck solutions with fully integrated, thermally robust, EMI-compliant modules that reduce design time and improve reliability in space-constrained applications.
FAQ
What is the minimum input voltage required for MAXM17906AMB+ to regulate a 0.9V output?
The MAXM17906AMB+ requires a minimum input voltage of 4.5V to maintain regulation across all output voltages, including 0.9V. This is due to internal controller and MOSFET headroom requirements - the device cannot operate below 4.5V regardless of output setting. At VIN = 4.5V and VOUT = 0.9V, efficiency drops to ~70%, but regulation remains within ±1.5% tolerance.
How do I configure MAXM17906AMB+ for a 2.5V output?
To set MAXM17906AMB+ to 2.5V output, use a resistor divider from OUT to GND with FB connected to the midpoint. With VFB-REG = 0.90V (typ), select R1 = 825kΩ and R2 = 2.2MΩ (as shown in the Typical Application Circuit). This yields VOUT = 0.90V × (1 + R2/R1) ≈ 2.5V. Ensure both resistors are 1% tolerance for accuracy within ±1.5%.
Does MAXM17906AMB+ support prebias startup?
Yes, MAXM17906AMB+ supports prebias startup: it can safely start into a precharged output (e.g., 2V on OUT before enable) without damaging the IC or causing output overshoot. This is confirmed in the "Startup Through Enable: 2V Prebias" oscilloscope waveforms (toc57/toc58/toc63/toc64) in the datasheet, showing clean regulation recovery under no-load and full-load PFM/PWM conditions.
What is the thermal resistance (θJA) of MAXM17906AMB+ on a standard PCB?
The junction-to-ambient thermal resistance (θJA) of MAXM17906AMB+ is 41.56°C/W when mounted on a four-layer evaluation board with natural convection, per the datasheet's "Thermal Resistance" table. This value assumes recommended copper pour and thermal vias under the exposed pad; actual θJA will vary with board stack-up and airflow.
Can MAXM17906AMB+ be used in CISPR-22 Class B EMI-compliant designs without external filtering?
Yes - the MAXM17906AMB+ passes CISPR-22 Class B conducted and radiated emissions *with only the recommended 0.1µF + 0.68µF input capacitor and 82µH filter choke*, as shown in the conducted emission plot (toc92) and radiated emission plot (toc93). No additional ferrite beads or LC filters are required for compliance in typical layouts.
MAXM17906AMB+ 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):
- 24V
- Voltage - Output 1:
- 0.9 ~ 6.3V
- 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:
- -
MAXM17906AMB+ FAQ
1.How can I place an order for MAXM17906AMB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAXM17906AMB+ 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 MAXM17906AMB+ reliable?
The price and inventory of MAXM17906AMB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAXM17906AMB+ is usually 5 days.
3.What payment methods are accepted for MAXM17906AMB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAXM17906AMB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAXM17906AMB+?
MAXM17906AMB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAXM17906AMB+ 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 MAXM17906AMB+?
For technical support, including MAXM17906AMB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAXM17906AMB+ requirements.
6.How does Aetrix verify that MAXM17906AMB+ is sourced from the original manufacturer or authorized distributors?
All MAXM17906AMB+ 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 MAXM17906AMB+ meets industry standards.
7.What is the process for return or replacement of MAXM17906AMB+?
All MAXM17906AMB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAXM17906AMB+, 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 MAXM17906AMB+ part is unused and in its original packaging.
Return procedure for MAXM17906AMB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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