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Analog Devices Inc./Maxim Integrated MAX17224ELT+
- Part No.:
- MAX17224ELT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN
- Datasheet:
-
MAX17224ELT+.pdf
- Description:
- IC REG BOOST ADJ 1A 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,381
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Product details
Overview
MAX17224ELT+ from Analog Devices is a nanoPower synchronous boost DC-DC converter optimized for ultra-low-quiescent-current battery-powered systems, featuring 1A peak inductor current limit, True Shutdown™ with 0.5nA shutdown current, and resistor-selectable output voltage (1.8V–5V) - deployed in optical heart-rate monitoring LED drivers and supercapacitor-backed RTCs.
For engineers reviewing the MAX17224ELT+ datasheet, MAX17224ELT+ pinout, MAX17224ELT+ application, or MAX17224ELT+ equivalent, this page delivers verified electrical parameters, validated μDFN-6 package mapping, confirmed enable transient protection (ETP), and real-world design constraints for primary-cell and low-voltage IoT sensor power rails.
Technical Context
The MAX17224ELT+ implements a fixed-on-time, current-limited PFM control scheme with 300ns maximum switch on-time and 1A N-channel MOSFET peak current limit. It operates across three dynamic modes - ultra-low-power mode (ULPM), low-power mode (LPM), and high-power mode (HPM) - automatically transitioning based on load current to maintain >95% peak efficiency from 100nA to 200mA output.
True Shutdown™ disconnects OUT from IN with no forward or reverse current path, enabling 0.5nA total shutdown current; its ETP feature sustains regulation down to 400mV input post-startup when EN is pulled high via external resistor, at the cost of added IQ_ETP dependent on pullup value and efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Supply Current (OUT) | 300nA typical - enables multi-year operation from coin cells in always-on sensors |
| Shutdown Current | 0.5nA total (IN + LX) - preserves supercapacitor charge during long-term RTC backup |
| Input Voltage Range | 400mV to 5.5V - supports startup from single alkaline/AgO/Zn-air cells and operation down to end-of-life voltage |
| Output Voltage Range | 1.8V to 5.0V in 100mV steps - set by single ±1% resistor (no feedback divider current loss) |
| Peak Inductor Current Limit | 1A - allows use of compact 2.2µH inductors while delivering ≥200mA at 3V out from 1.5V in |
| Startup Input Voltage | 0.88V typical - ensures reliable cold-start from weak primary cells under light load |
| Package | 2mm × 2mm, 6-pin μDFN (L622+1C) - fits <3mm² PCB area with thermal resistance θJA = 223.6°C/W |
Pinout & Package
MAX17224ELT+ is supplied in a 2mm × 2mm, 6-pin µDFN package (package code L622+1C, outline 21-0164) with exposed pad for thermal dissipation. Pin 1 is marked by dot; pin numbering follows standard counter-clockwise layout from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output node | Connects to 10µF X5R ceramic capacitor; supplies regulated voltage to load with ≤±1.5% accuracy in LPM |
| 2 (LX) | Switching node | Drives external inductor; rated for 1ARMS continuous; internal clamps limit voltage swing to GND and OUT |
| 3 (GND) | Power ground reference | Low-impedance return path for IN, OUT, and LX currents; must connect directly to power plane under device |
| 4 (SEL) | Output voltage selection input | Reads single 1% resistor to GND during 600µs startup window; no continuous current draw |
| 5 (IN) | Input supply connection | Accepts 400mV–5.5V; requires 10µF X5R ceramic capacitor; supports hot-plug soft-start |
| 6 (EN) | Active-high enable control | EN ≥600mV enables operation; includes ETP circuitry allowing sustained regulation even if IN drops to 400mV post-startup |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with complete output-to-input isolation and reverse-current blocking up to 5V |
| Enable Transient Protection (ETP) | Maintains regulation at IN ≥400mV after startup - critical for stable LED driver bias during battery voltage sag |
| RSEL single-resistor programming | Eliminates feedback divider current loss and reduces BOM count; supports 1.8V–5.0V outputs with ±1% resistor |
| PFM control with 3-mode operation | Automatically selects ULPM (<1.5mA), LPM (1.5–50mA), or HPM (>50mA) to sustain >90% efficiency across 7-decade load range |
| Ultra-low 300nA quiescent current into OUT | Enables >10-year shelf life in medical wearables using CR2032; measured at VOUT = 104% of 1.8V, TA = +25°C |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
Use Scenario: Primary-cell wearable monitors use pulsed green LEDs requiring stable 3.3V/5V bias during brief measurement windows. IC Role / Device Role / Timing Role: Boost converter supplying regulated LED drive voltage from 0.9–1.6V AgO/Zn-air cells; enables true shutdown between pulses. Use Value: 300nA quiescent current extends battery life beyond 2 years; ETP prevents dropout during cell voltage sag under pulse load. |
Use Scenario: Real-time clock or alarm buzzer must retain function during main power failure using supercapacitor energy storage. IC Role / Device Role / Timing Role: Bidirectional voltage regulator maintaining 3.3V/5V output as supercapacitor discharges from 5.5V down to 400mV. Use Value: True Shutdown blocks reverse current into depleted supercap; 0.5nA shutdown current minimizes self-discharge over months. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
Use Scenario: AAA/AA-powered environmental sensors operate intermittently, harvesting energy or sleeping for hours between transmissions. IC Role / Device Role / Timing Role: Primary power rail generator stepping up 0.95V minimum input to 3.0V system voltage; starts reliably at 0.88V. Use Value: 400mV operating floor allows full utilization of alkaline cell capacity; RSEL simplifies firmware-agnostic hardware variants. |
Use Scenario: Sub-1cm³ industrial temperature/humidity nodes powered by coin cells transmit data every 5 minutes via BLE. IC Role / Device Role / Timing Role: Ultra-low-IQ boost stage powering MCU and radio; enters ULPM during 4.9-minute sleep cycles. Use Value: 11.5Hz minimum switching frequency in ULPM reduces EMI; 300nA IQ_OUT enables >5-year runtime on CR2032. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ELT+ | 500mA peak inductor current limit; identical package, pinout, and RSEL interface | Lower output current capability limits use to ≤100mA loads; unsuitable for 5V buzzer drivers or high-brightness OHRM LEDs | Select MAX17222ELT+ only when 1A ILIM is unnecessary and lower cost is prioritized |
| TPS61291DRVR | 3.5µA quiescent current (vs. 300nA); 1.8V–5.5V output; no True Shutdown or ETP | Lacks sub-1µA shutdown and input-sag resilience; requires external reverse-blocking FET for supercap backup | Choose TPS61291DRVR only if higher IQ is acceptable and system-level reverse-current protection is already implemented |
Compared with MAX17222ELT+, the MAX17224ELT+ delivers double peak current for higher-output applications without layout change; versus TPS61291DRVR, it achieves 11× lower quiescent current and integrated reverse-current blocking essential for energy-harvesting and backup systems.
Availability
MAX17224ELT+ is available at Aetrix Electronics and suitable for optical heart-rate monitoring, supercapacitor-backed RTCs, and primary-cell IoT sensors requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX17224ELT+ 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 power management semiconductors, serving precision instrumentation, industrial, automotive, and healthcare markets.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power, small-footprint boost conversion in battery-constrained devices - emphasizing nanoamp quiescent current, single-resistor programmability, and robust low-voltage operation.
FAQ
What is the minimum input voltage required for MAX17224ELT+ to start up?
The MAX17224ELT+ has a typical startup input voltage of 0.88V and is guaranteed to start from 0.95V across temperature. It continues operating down to 400mV post-startup when enabled, thanks to Enable Transient Protection (ETP). This behavior is confirmed in the Electrical Characteristics table and Typical Operating Characteristics section of the datasheet, with test conditions specifying RL ≥ 3kΩ and typical operating circuit configuration.
Does MAX17224ELT+ support true output disconnect during shutdown?
Yes, MAX17224ELT+ implements True Shutdown™, which physically disconnects the output from the input with no forward or reverse current path. Total shutdown current is specified at 0.5nA (IN + LX), and reverse current is blocked across the full 0V–5V VOUT range - a key differentiator validated in the Absolute Maximum Ratings and Detailed Description sections.
How is the output voltage programmed on MAX17224ELT+?
The MAX17224ELT+ uses a single-resistor selection method (RSEL): a standard ±1% resistor connected from SEL pin to GND sets the output voltage from 1.8V to 5.0V in 100mV steps. The resistor value is sampled once during a 600µs detection window at startup - eliminating continuous divider current and enabling flexible BOM management. The RSEL Selection Table in the datasheet lists exact values (e.g., 133kΩ for 3.0V).
What package type and footprint does MAX17224ELT+ use?
MAX17224ELT+ is packaged in a 2mm × 2mm, 6-pin µDFN (package code L622+1C, outline 21-0164) with exposed thermal pad. Land pattern number 90-0004 applies. This package is distinct from the 0.88mm × 1.4mm WLP variant and is explicitly referenced in the Pin Configurations and Package Information sections of the datasheet.
Is MAX17224ELT+ compatible with primary-cell chemistries like silver-oxide or zinc-air?
Yes, MAX17224ELT+ is explicitly qualified for primary-cell systems including silver-oxide (AgO), zinc-air, and alkaline batteries. Its 0.88V startup voltage and 400mV operational floor allow full discharge utilization, and application diagrams (Figures 7–9) confirm usage in AAA/AA-powered wearables and sensors - all validated under real load conditions per the Applications Information section.
MAX17224ELT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (2x2)
MAX17224ELT+ FAQ
1.How can I place an order for MAX17224ELT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17224ELT+ 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 MAX17224ELT+ reliable?
The price and inventory of MAX17224ELT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17224ELT+ is usually 5 days.
3.What payment methods are accepted for MAX17224ELT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17224ELT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17224ELT+?
MAX17224ELT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17224ELT+ 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 MAX17224ELT+?
For technical support, including MAX17224ELT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17224ELT+ requirements.
6.How does Aetrix verify that MAX17224ELT+ is sourced from the original manufacturer or authorized distributors?
All MAX17224ELT+ 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 MAX17224ELT+ meets industry standards.
7.What is the process for return or replacement of MAX17224ELT+?
All MAX17224ELT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17224ELT+, 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 MAX17224ELT+ part is unused and in its original packaging.
Return procedure for MAX17224ELT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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