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Analog Devices Inc./Maxim Integrated MAX17223ELT+T
- Part No.:
- MAX17223ELT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN
- Datasheet:
-
MAX17223ELT+T.pdf
- Description:
- IC REG BOOST ADJ 500MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,175
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Product details
Overview
MAX17223ELT+T from Analog Devices is a nanoPower synchronous boost DC-DC converter with 500mA peak inductor current limit, True Shutdown™ (0.5nA shutdown current), and single-resistor-selectable output voltage (1.8V–5V). It operates from 400mV input down to startup at 0.88V and delivers up to 95% peak efficiency-ideal for optical heart-rate monitoring LED drivers and supercapacitor-backed RTCs in ultra-low-power wearable medical sensors.
For engineers reviewing the MAX17223ELT+T datasheet, MAX17223ELT+T pinout, MAX17223ELT+T application, or MAX17223ELT+T equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across temperature, real-world ETP behavior under sub-500mV input transients, and two rigorously cross-checked alternative parts for battery-constrained designs.
Technical Context
The MAX17223ELT+T implements a fixed-on-time, current-limited PFM control scheme with 300ns maximum switch on-time and 500mA N-channel MOSFET peak current limit. It automatically transitions between Ultra-Low-Power Mode (ULPM), Low-Power Mode (LPM), and High-Power Mode (HPM) based on load current-enabling stable regulation from 400mV input while maintaining 300nA quiescent supply current into OUT.
Its True Shutdown disconnects OUT from IN with no forward or reverse current flow (0.5nA total shutdown current), and its Enable Transient Protection (ETP) allows continued regulation when input drops to 400mV post-startup-enabled only in MAX17220/MAX17222/MAX17224 variants, confirming MAX17223ELT+T does not include ETP per datasheet family grouping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 400mV to 5.5V - supports direct operation from partially discharged primary cells (e.g., silver oxide, zinc-air) without external LDO pre-regulation. |
| Output Voltage Range | 1.8V to 5.0V in 100mV steps - set by single ±1% resistor (RSEL), eliminating feedback divider current loss in battery lifetime-critical applications. |
| Peak Inductor Current Limit | 500mA - matches MAX17222/MAX17223 variants; enables use of compact 2.2µH inductors while delivering >200mA continuous output at 3V out from 1.5V in. |
| Quiescent Supply Current (OUT) | 300nA typical - measured into OUT pin with EN open after startup; defines minimum system sleep current in always-on sensor nodes. |
| True Shutdown Current | 0.5nA total (IN + LX) - guarantees near-zero battery drain during deep sleep, critical for multi-year battery life in IoT edge devices. |
| Startup Input Voltage | 0.88V typical - enables reliable cold-start from supercapacitors discharging below 1V or weak primary cells at end-of-life. |
| Package | 2mm × 2mm, 6-pin µDFN (L622+1C) - RoHS-compliant, thermally enhanced footprint with 223.6°C/W θJA on 4-layer board. |
Pinout & Package
MAX17223ELT+T is housed in a 2mm × 2mm, 6-pin µDFN package (package code L622+1C, outline 21-0164) with exposed thermal pad. Pin 1 (OUT) is top-left corner; pin numbering follows standard counter-clockwise sequence. Land pattern conforms to Maxim/Analog Devices reference LPN 90-0004.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output node | Connects to 10µF X5R ceramic capacitor; supplies power to load; voltage accuracy ±1.5% in LPM, ±2.5% in ULPM. |
| 2 (LX) | Switching node | Drives external inductor; internal N-channel MOSFET switch with 62mΩ RDS(ON); requires short, low-inductance PCB trace. |
| 3 (GND) | Power and signal ground | Primary return path for IN, OUT, and LX currents; must connect directly to thermal pad and bulk capacitor ground plane. |
| 4 (SEL) | Output voltage selection input | Reads single ±1% resistor to GND during 600µs detection window; no continuous current draw; supports open (1.8V) to short (5.0V) range. |
| 5 (IN) | Input power supply | Accepts 400mV–5.5V; connects to 10µF X5R ceramic capacitor; high-impedance during shutdown due to True Shutdown isolation. |
| 6 (EN) | Active-high enable control | Pulled high internally; 250mV VIL threshold ensures robust noise immunity; no ETP circuitry (confirmed for MAX17223 variant). |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ isolation | 0.5nA total shutdown current with complete bidirectional blocking between IN and OUT - eliminates battery leakage in storage or standby. |
| Single-resistor output programming | RSEL pin reads ±1% resistor value at startup only (600µs), then enters high-Z state - removes static divider current, extending battery life vs. traditional feedback networks. |
| NanoPower PFM control | 300nA quiescent current into OUT with automatic ULPM/LPM/HPM mode switching - maintains regulation across 10nA–200mA load range without external biasing. |
| Ultra-low-voltage startup | 0.88V typical startup voltage with 400mV operational floor - enables direct interface with supercapacitors and primary cells down to end-of-discharge. |
| High-efficiency synchronous rectification | 95% peak efficiency at 3V out / 1.5V in with 2.2µH inductor - reduces thermal stress and extends runtime in space-constrained wearables. |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
|
Use Scenario: Driving high-current green/red/IR LEDs in wrist-worn pulse oximetry sensors powered by AAA/AA silver-oxide cells. IC Role / Device Role / Timing Role: Boost converter supplying regulated 3.3V or 5V to OHRM LEDs while drawing <300nA in sensor idle state. Use Value: Enables >2-year battery life via nanoPower quiescent current and 0.88V startup - sustains LED pulsing even as cell voltage decays below 0.9V. |
Use Scenario: Maintaining 3.3V RTC voltage during main power loss using a 0.1F–1F supercapacitor charged from 3.3V rail. IC Role / Device Role / Timing Role: Bidirectionally isolated boost regulator that regulates 3.3V output as supercap discharges from 5V down to 400mV. Use Value: True Shutdown prevents reverse current drain from supercap; 400mV operational floor preserves RTC timekeeping for >72 hours after main power failure. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
|
Use Scenario: Powering Bluetooth LE temperature loggers using zinc-air or silver-oxide button cells in industrial asset tags. IC Role / Device Role / Timing Role: Primary DC-DC converter stepping up 0.8–1.6V cell voltage to stable 3.0V for MCU and radio during brief transmission bursts. Use Value: 500mA peak current limit supports 20mA BLE transmit peaks; 300nA IQ minimizes self-discharge - extends tag lifetime beyond 5 years. |
Use Scenario: Supplying 1.8V–3.3V to MEMS accelerometers and environmental sensors in coin-cell-powered predictive maintenance nodes. IC Role / Device Role / Timing Role: Always-on voltage source enabling sub-100nA deep-sleep current and fast wake-up from 400mV input. Use Value: Single-resistor output selection simplifies BOM; µDFN package fits <3mm² PCB area - ideal for miniaturized wireless sensor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ELT+T | Identical 500mA ILIM, same 2mm×2mm µDFN package, but includes Enable Transient Protection (ETP) - allows regulation down to 400mV post-startup with EN tied high. | Preferred where input voltage may dip transiently (e.g., mechanical switch bounce, battery insertion); MAX17223ELT+T lacks ETP per datasheet family mapping. | Select MAX17222ELT+T if ETP is required; otherwise MAX17223ELT+T offers identical efficiency, IQ, and output flexibility without ETP overhead. |
| TPS61291DRVR | 300nA IQ, 500mA ILIM, but uses external feedback resistors (no RSEL); 0.7V min startup; 1.2MHz fixed-frequency PWM (vs. PFM). | Better suited for noise-sensitive analog circuits requiring fixed switching frequency; lacks True Shutdown - 100nA shutdown current vs. 0.5nA. | Choose TPS61291DRVR when deterministic EMI profile matters more than absolute lowest shutdown current or smallest solution size. |
Compared with MAX17222ELT+T, MAX17223ELT+T trades ETP capability for marginally lower system-level quiescent current in non-transient environments; versus TPS61291DRVR, it delivers superior shutdown isolation and eliminates feedback resistor current loss - critical for decade-long battery life in unattended sensors.
Availability
MAX17223ELT+T is available at Aetrix Electronics and suitable for optical heart-rate monitors, supercapacitor-backed RTCs, primary-cell wearables, low-power IoT sensors, and battery-powered medical equipment requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX17223ELT+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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power battery-operated systems - prioritizing nanoPower quiescent current, minimal solution size, and reliable startup from depleted energy sources like supercapacitors and primary cells.
FAQ
What is the minimum input voltage required for MAX17223ELT+T to start up and regulate?
The MAX17223ELT+T has a typical startup input voltage of 0.88V under standard test conditions (RL ≥ 3kΩ, TA = +25°C), with guaranteed operation down to 0.95V across temperature. Once started, it continues regulating down to 400mV input depending on load current - though unlike MAX17222ELT+T, MAX17223ELT+T does not include Enable Transient Protection, so EN must remain asserted for sustained low-VIN operation.
Does MAX17223ELT+T support True Shutdown, and what is its shutdown current?
Yes, MAX17223ELT+T features True Shutdown™, which fully disconnects the output from the input with no forward or reverse current path. Its total shutdown current into IN and LX is specified at 0.5nA typical (TA = +25°C), confirmed in the Electrical Characteristics table - making it suitable for multi-year battery applications where leakage must be minimized.
How is the output voltage set on MAX17223ELT+T, and what resistor tolerance is required?
The output voltage of MAX17223ELT+T is set using a single resistor (RSEL) connected from the SEL pin to GND. The datasheet specifies ±1% resistor tolerance is required - e.g., 133kΩ for 3.0V output - and the device reads RSEL only once during a 600µs window at startup, then enters high-impedance mode to eliminate static current loss.
What package type and footprint does MAX17223ELT+T use?
MAX17223ELT+T is supplied in a 2mm × 2mm, 6-pin µDFN package (package code L622+1C, outline number 21-0164) with exposed thermal pad. The recommended land pattern is Maxim/Analog Devices reference LPN 90-0004 - a symmetric 6-pad layout with 0.5mm pitch and thermal pad centered beneath the die.
Is MAX17223ELT+T pin-compatible with other members of the MAX17220–MAX17225 family?
Yes, all MAX17220–MAX17225 variants share identical 6-pin µDFN and WLP packages and pinouts - including MAX17223ELT+T. This allows drop-in replacement across the family for different peak current limits (225mA/500mA/1A) and ETP inclusion (MAX17220/222/224 vs. MAX17221/223/225), provided the application's current and transient requirements align.
MAX17223ELT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN
- Packaging:
- Tape & Reel (TR)
- 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:
- 500mA (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)
MAX17223ELT+T FAQ
1.How can I place an order for MAX17223ELT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17223ELT+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 MAX17223ELT+T reliable?
The price and inventory of MAX17223ELT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17223ELT+T is usually 5 days.
3.What payment methods are accepted for MAX17223ELT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17223ELT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17223ELT+T?
MAX17223ELT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17223ELT+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 MAX17223ELT+T?
For technical support, including MAX17223ELT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17223ELT+T requirements.
6.How does Aetrix verify that MAX17223ELT+T is sourced from the original manufacturer or authorized distributors?
All MAX17223ELT+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 MAX17223ELT+T meets industry standards.
7.What is the process for return or replacement of MAX17223ELT+T?
All MAX17223ELT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17223ELT+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 MAX17223ELT+T part is unused and in its original packaging.
Return procedure for MAX17223ELT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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