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Analog Devices Inc./Maxim Integrated MAXM17720AMB+
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- Part No.:
- MAXM17720AMB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- DC DC Converters
- Package:
- 10-SMD Module
- Datasheet:
-
MAXM17720AMB+.pdf
- Description:
- 4.5V TO 60V INPUT, 150MA, 3.3V S
- Quantity:
- Payment:
- Shipping:
Inventory:3,771
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Product details
Overview
The MAXM17720AMB+ from Analog Devices is a dual-output Himalaya uSLIC power module integrating a 4V–60V input, 150mA synchronous step-down DC-DC converter with fixed 5V output and a 50mA high-PSRR linear regulator delivering 3.3V output. It features internal inductor, peak-current-mode control, and operates across –40°C to +125°C ambient for industrial sensor and PLC power rails.
For engineers reviewing the MAXM17720AMB+ datasheet, MAXM17720AMB+ pinout, MAXM17720AMB+ application, or MAXM17720AMB+ equivalent, key selection criteria include its 5V/150mA buck + 3.3V/50mA LDO dual-rail capability, 610kHz default switching frequency, ±2% FB accuracy, 5.1ms soft-start, and 10-pin uSLIC package with integrated thermal protection.
Technical Context
The MAXM17720AMB+ implements peak-current-mode control for its step-down converter, with programmable 350kHz–2.2MHz switching via RT pin and selectable PWM/ PF M operation via MODE/SYNC. Its internal 47μH inductor and compensation eliminate external loop components.
The linear regulator receives power from the buck output (VOUTB), accepts 2.35V–5V input, delivers up to 50mA at ±1.33% accuracy (for 3.3V variant), and includes 200mV dropout at 50mA load. RESET asserts low if VOUTB falls below 92% or VOUTL below 91.5% of nominal values.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide industrial input sources including 12V, 24V, and 48V rails without external pre-regulation. |
| Buck Output | Fixed 5V @ up to 150mA - powers downstream logic, ADCs, or interface ICs directly from high-voltage inputs. |
| LDO Output | Fixed 3.3V @ up to 50mA - provides low-noise, high-PSRR supply for sensitive analog or RF circuitry. |
| Switching Frequency | Default 610kHz (adjustable 350kHz–2.2MHz) - balances efficiency, size, and EMI; PFM mode disabled above 900kHz. |
| FB Accuracy | ±2% for buck output - ensures stable 5V regulation under line/load/temperature variation. |
| Soft-Start Time | 5.1ms (buck), 1.1ms (LDO) - prevents inrush current during power-up and enables safe startup into prebiased outputs. |
| Quiescent Current | 70μA (no-load, PFM), 2.5μA (shutdown) - extends battery life in always-on industrial monitoring systems. |
Pinout & Package
Package: 10-pin uSLIC (2.6mm × 3mm × 1.5mm), RoHS-compliant, thermal resistance θJA = 45°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX | Switching node | Internal connection to high-side/low-side MOSFETs; no external components permitted - critical for EMI and layout integrity. |
| GND | Power ground reference | Must connect to single-point ground plane; serves as return path for buck, LDO, and control circuits. |
| MODE/SYNC | Mode selection & clock sync | Ground for forced PWM; open for PFM; accepts external clock 1.1×–1.4× fSW for system-level synchronization. |
| RESET | Open-drain power-good | Pulled high externally; asserts low if VOUTB < 92% or VOUTL < 91.5%; delays 2.1ms after regulation achieved. |
| OUTB | Buck output / LDO input | Delivers 5V/150mA; feeds internal LDO; requires ≥1µF ceramic capacitor to GND for stability. |
| OUTL | LDO output | Delivers 3.3V/50mA; requires ≥2.2µF ceramic capacitor to GND; monitored internally for RESET assertion. |
| FB | Buck feedback input | Connected directly to OUTB for fixed 5V output; sets regulation point with ±2% accuracy. |
| RT | Frequency programming | Resistor-to-GND sets fSW; unconnected defaults to 610kHz; enables EMI tuning and noise-sensitive layout optimization. |
| EN/UVLO | Enable & input UVLO | Rising threshold 1.215V (typ); supports resistor-divider for custom turn-on voltage down to 4V minimum. |
| IN | Buck input supply | Accepts 4V–60V; decoupled with 1µF X7R ceramic; withstands 70V absolute max transient. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated inductor & compensation | Eliminates 3–5 external components per rail, reducing BOM count and layout area by >40% vs discrete solutions. |
| Selectably efficient light-load operation | PFM mode cuts no-load IQ to 70μA, extending runtime in battery-powered sensors and wireless nodes. |
| Robust hiccup OCP & thermal shutdown | Auto-retry protection with 51ms hiccup timeout and 160°C junction shutdown ensures survival under sustained overload or poor heatsinking. |
| Prebias startup support | Enables safe power sequencing in multi-rail systems (e.g., FPGA + analog front-end) without discharging existing output capacitors. |
| CISPR22 Class B compliance | Meets conducted/radiated emissions limits without external shielding or ferrites - accelerates EMC certification. |
Applications
| Industrial Sensors | Programmable Logic Controller |
|---|---|
Use Scenario: Powering 4–20mA transmitters, RTD interfaces, and MEMS pressure sensors in factory-floor environments with 24V DC supply and wide temperature swings. IC Role / Device Role / Timing Role: Dual-rail power source delivering clean 5V for microcontroller and 3.3V for precision ADC/signal chain - replacing discrete buck + LDO + magnetics. Use Value: Reduces PCB area by >65% versus discrete solution while maintaining ±1.33% LDO accuracy and 70μA quiescent current for low-power wake-up modes. | Use Scenario: Supplying I/O modules, communication interfaces (RS-485, CAN), and real-time controllers in DIN-rail mounted PLCs operating from 24V or 48V bus. IC Role / Device Role / Timing Role: Primary 5V/150mA and auxiliary 3.3V/50mA regulator with RESET supervision - enabling deterministic power-up sequencing and fault detection. Use Value: Built-in hiccup OCP and thermal shutdown prevent field failures due to shorted I/O lines or enclosure overheating, improving MTBF. |
| Battery-Powered Equipment | HVAC and Building Control |
Use Scenario: Power management for wireless sensor nodes (LoRaWAN, NB-IoT) using LiSOCl₂ or AA batteries with 2.8V–3.6V nominal voltage, requiring boost-free operation. IC Role / Device Role / Timing Role: High-efficiency dual-output regulator accepting up to 60V input - enabling direct use of solar-charged 12V/24V battery banks without intermediate conversion. Use Value: 2.5μA shutdown current and PFM mode extend shelf life and operational lifetime; compact uSLIC footprint fits space-constrained enclosures. | Use Scenario: Powering smart thermostats, zone controllers, and damper actuators in commercial HVAC systems powered from 24V AC/DC or PoE-derived supplies. IC Role / Device Role / Timing Role: Single-chip solution for 5V MCU core and 3.3V communication PHY - simplifying design for UL/CE-certified building automation equipment. Use Value: -40°C to +125°C ambient rating ensures reliable operation inside hot attics or cold basements; CISPR22 Class B compliance avoids costly EMI rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAXM17715AMB+ | Same 5V buck + 3.3V LDO, but fixed 3.3V LDO output and identical pinout/package. | Identical use cases; differs only in LDO output voltage option (both deliver 3.3V). | Select MAXM17715AMB+ if exact same electrical behavior is required and MAXM17720AMB+ is unavailable - functionally interchangeable in 3.3V LDO designs. |
| MAXM17721AMB+ | Adjustable buck output (2.5V–5V) instead of fixed 5V; same 3.3V LDO and pinout. | Suitable where variable buck voltage is needed (e.g., adaptive core voltage), but requires external FB divider and adds design complexity. | Choose MAXM17721AMB+ only when adjustable buck output is mandatory; otherwise MAXM17720AMB+ offers simpler, optimized 5V rail generation. |
Compared with MAXM17715AMB+, MAXM17720AMB+ shares identical LDO output and thermal specs but is part of the same fixed-buck family - whereas MAXM17721AMB+ trades fixed 5V simplicity for buck adjustability at the cost of added external components and reduced out-of-box usability.
Availability
MAXM17720AMB+ is available at Aetrix Electronics and suitable for industrial sensors, programmable logic controllers, and battery-powered equipment requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for MAXM17720AMB+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power, sensing, and signal chain solutions.
The MAXM17720AMB+ belongs to the Himalaya uSLIC power module product line, engineered to replace complex discrete DC-DC + LDO designs with fully integrated, thermally robust, and EMC-compliant power subsystems for harsh industrial environments.
FAQ
What is the maximum output current capability of the MAXM17720AMB+?
The MAXM17720AMB+ delivers up to 150mA from its fixed 5V step-down converter and up to 50mA from its fixed 3.3V linear regulator. Total combined output current is limited to 150mA because the LDO draws power from the buck output - meaning the sum of buck load and LDO load must not exceed 150mA. The LDO itself is rated for 50mA continuous output with 84mA current limit.
Does the MAXM17720AMB+ support startup into a prebiased output?
Yes, the MAXM17720AMB+ supports soft-start into a prebiased OUTB output in both PWM and PFM modes without discharging the output capacitor. This feature is essential for powering multi-rail systems like microcontrollers with separate core and I/O supplies, ensuring deterministic sequencing and preventing back-driving of powered rails.
What is the default switching frequency of the MAXM17720AMB+, and how is it adjusted?
The MAXM17720AMB+ defaults to 610kHz switching frequency when the RT pin is left unconnected. To adjust frequency between 350kHz and 2.2MHz, connect a resistor from RT to GND using the formula RRT = 500/(11.6 × tSW − 0.045) − 0.5, where tSW = 1/fSW. Note that PFM mode is only supported up to 900kHz.
How does the RESET function operate on the MAXM17720AMB+?
The RESET pin on the MAXM17720AMB+ is an open-drain output that goes high-impedance 2.1ms after both OUTB reaches ≥95% of 5V and OUTL reaches ≥95% of 3.3V. It pulls low within 4μs if either output drops below 92% (OUTB) or 91.5% (OUTL) of nominal, or if EN/UVLO falls below its 1.215V threshold. RESET is disabled in PFM mode.
What thermal protection mechanisms are built into the MAXM17720AMB+?
The MAXM17720AMB+ includes two thermal protections: (1) hiccup-mode overcurrent protection triggered by 16 consecutive inductor peak-current limit events (295mA typ), with 51ms timeout; and (2) thermal shutdown at 160°C junction temperature, with 20°C hysteresis. Both features auto-recover after fault removal, ensuring robust operation in enclosed or high-ambient-temperature environments.
MAXM17720AMB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-SMD Module
- Packaging:
- Strip
- Product Status:
- Active
- Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output 1:
- -
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- -
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- -
- Features:
- -
- Operating Temperature:
- -
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-eMGA (3x2.6)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MAXM17720AMB+ FAQ
1.How can I place an order for MAXM17720AMB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAXM17720AMB+ 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 MAXM17720AMB+ reliable?
The price and inventory of MAXM17720AMB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAXM17720AMB+ is usually 5 days.
3.What payment methods are accepted for MAXM17720AMB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAXM17720AMB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAXM17720AMB+?
MAXM17720AMB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAXM17720AMB+ 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 MAXM17720AMB+?
For technical support, including MAXM17720AMB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAXM17720AMB+ requirements.
6.How does Aetrix verify that MAXM17720AMB+ is sourced from the original manufacturer or authorized distributors?
All MAXM17720AMB+ 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 MAXM17720AMB+ meets industry standards.
7.What is the process for return or replacement of MAXM17720AMB+?
All MAXM17720AMB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAXM17720AMB+, 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 MAXM17720AMB+ part is unused and in its original packaging.
Return procedure for MAXM17720AMB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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