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Analog Devices Inc./Maxim Integrated MAX17223ELT+
- Part No.:
- MAX17223ELT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN
- Datasheet:
-
MAX17223ELT+.pdf
- Description:
- IC REG BOOST ADJ 500MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,751
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Product details
Overview
The MAX17223ELT+ from Analog Devices is a nanoPower synchronous boost DC-DC converter optimized for ultra-low-quiescent-current battery-powered systems, featuring 500mA peak inductor current limit, True Shutdown™ with 0.5nA shutdown current, 400mV minimum operating input voltage, and single 1% resistor-selectable output (1.8V–5V). It enables long-life operation in optical heart-rate monitoring LED drivers and supercapacitor-backed RTCs.
For engineers reviewing the MAX17223ELT+ datasheet, MAX17223ELT+ pinout, MAX17223ELT+ application, or MAX17223ELT+ equivalent, key selection considerations include its 300nA quiescent supply current into OUT, 0.88V startup voltage, 2mm × 2mm μDFN-6 package, and enable transient protection (ETP) for stable regulation down to 400mV input under load.
Technical Context
The MAX17223ELT+ implements a fixed-on-time, current-limited PFM control scheme with three operating modes-ultra-low-power mode (ULPM), low-power mode (LPM), and high-power mode (HPM)-automatically selected based on load current. Its 300ns maximum switch on-time and 500mA N-channel MOSFET peak current limit (RDS(ON) = 62mΩ typical at VOUT = 3.3V) support efficient light-load regulation and rapid transient response.
True Shutdown™ disconnects OUT from IN with no forward or reverse current path, enabling zero-load leakage across VOUT = 0V–5V. The RSEL pin reads a single 1% resistor during a 600μs detection window to set output voltage in 100mV steps, eliminating continuous feedback resistor current loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Supply Current into OUT | 300nA typical - enables multi-year battery life in always-on sensor nodes |
| Shutdown Current | 0.5nA typical - ensures near-zero system standby drain when disabled |
| Input Voltage Range | 400mV to 5.5V - supports direct operation from partially discharged primary cells (e.g., silver oxide, zinc-air) |
| Output Voltage Range | 1.8V to 5.0V, 100mV/step - set by single 1% resistor; avoids dual-resistor divider losses |
| Peak Inductor Current Limit | 500mA - defines maximum energy transfer per cycle; matches 2.2µH inductors for optimal size/efficiency tradeoff |
| Startup Input Voltage | 0.88V typical - allows cold-start from weak or aging batteries without external charge pump |
| Package | 2mm × 2mm, 6-pin μDFN - enables compact PCB layout with minimal thermal resistance (θJA = 223.6°C/W) |
Pinout & Package
The MAX17223ELT+ is housed in a 2mm × 2mm, 6-pin μDFN package (package code L622+1C, outline 21-0164) with wettable flank leads for automated optical inspection. Thermal performance is optimized for four-layer boards (θJA = 223.6°C/W, θJC = 122°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input power supply connection | Accepts 400mV–5.5V; requires ≥10µF X5R ceramic capacitor to ground for stability and EMI suppression |
| 2 (OUT) | Regulated output node | Delivers 1.8V–5V; must connect ≥10µF X5R ceramic capacitor directly to GND with minimal trace length |
| 3 (GND) | Power and signal reference | Primary return path for IN, OUT, and LX; requires low-inductance connection to power plane |
| 4 (SEL) | Output voltage selection input | Reads single 1% resistor to GND during 600µs startup window; capacitance <2pF required for accuracy |
| 5 (LX) | Switching node | Connects inductor between IN and LX; high dv/dt node requiring shortest possible trace and minimized copper area |
| 6 (EN) | Active-high enable control | Enables device above 600mV (typ); MAX17223ELT+ includes ETP to maintain regulation if IN drops to 400mV post-startup |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with full output-to-input isolation and reverse-current blocking up to 5V |
| Enable Transient Protection (ETP) | Maintains regulated output down to 400mV input after startup-critical for primary-cell wearables experiencing voltage sag |
| RSEL single-resistor programming | Eliminates continuous divider current loss; supports 1.8V–5.0V outputs using only standard 1% resistors (e.g., 133kΩ for 3.0V) |
| PFM control with 3-mode operation | ULPM (11.5Hz min freq), LPM, and HPM automatically adapt to load-ensuring >90% efficiency from 10µA to 200mA |
| NanoPower architecture | 300nA quiescent current into OUT + 0.5nA total shutdown current enables >10-year battery life in µA-level sensor applications |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
|
Use Scenario: Primary-cell wearable monitors pulse oximetry using pulsed green LEDs requiring stable 3.3V supply. IC Role / Device Role / Timing Role: Boost converter provides regulated 3.3V from 0.9–1.6V silver-oxide cell; ETP maintains regulation during battery voltage sag during LED pulses. Use Value: Enables >2-year battery life with 300nA quiescent current and eliminates need for larger-capacity backup batteries. |
Use Scenario: Real-time clock and alarm buzzer retain function during main power failure using supercapacitor energy storage. IC Role / Device Role / Timing Role: Regulates 3.3V output from supercapacitor discharging from 5.5V down to 400mV; True Shutdown blocks reverse current to preserve stored charge. Use Value: Extends RTC hold-up time by >3× versus diode-based solutions; 0.5nA shutdown current minimizes self-discharge. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
|
Use Scenario: AAA/AA-powered environmental sensor node operates continuously on alkaline or zinc-air cells. IC Role / Device Role / Timing Role: Steps up decaying 1.5V–0.4V input to stable 3.0V for microcontroller and BLE radio; starts reliably at 0.88V. Use Value: Extracts >95% of usable energy from primary cells-extending field deployment from months to years. |
Use Scenario: Sub-mm³ industrial temperature/humidity sensor transmits data every 5 minutes via LPWAN. IC Role / Device Role / Timing Role: Powers 1.8V MCU and sensor interface from coin-cell; ULPM delivers 11.5Hz switching for lowest idle current. Use Value: Achieves 7-year battery life at 10µA average system current; RSEL simplifies BOM with one IC across multiple voltage variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ELT+ | Identical 500mA ILIM, same package and pinout; differs only in ETP enable logic (MAX17222 uses EN = VIN, MAX17223 uses EN = open-drain pullup) | Preferred for push-pull GPIO control; MAX17223 better suited for open-drain or mechanical switch interfaces | Select MAX17223ELT+ when EN must be driven by open-drain microcontroller or momentary switch to minimize system shutdown current. |
| TPS61291DRVR | 350nA IQ, 400mV–5.5V input, but only 300mA ILIM and no ETP; uses different feedback topology requiring two resistors | Lacks ETP and lower current capability limits use in high-pulse OHRM loads; higher quiescent current reduces battery life | Choose TPS61291DRVR only if footprint compatibility with TI designs is mandatory and ETP is not required. |
Compared with MAX17222ELT+, the MAX17223ELT+ offers superior system-level shutdown current control in open-drain EN configurations; versus TPS61291DRVR, it delivers higher peak current, true output disconnect, and resistor-programmable voltage without feedback divider losses.
Availability
The MAX17223ELT+ is available at Aetrix Electronics and suitable for optical heart-rate monitoring, supercapacitor RTC backup, and primary-cell IoT sensor applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX17223ELT+ 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 (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial, automotive, and medical markets.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power portable electronics-enabling multi-year battery life in wearables, medical sensors, and energy-harvesting systems through nanoPower architecture and intelligent power-path control.
FAQ
What is the minimum input voltage required for the MAX17223ELT+ to start up?
The MAX17223ELT+ has a typical startup input voltage of 0.88V at room temperature with a 3kΩ load, enabling reliable cold-start from nearly depleted primary cells. Once running, it continues regulating down to 400mV input depending on load current-thanks to its Enable Transient Protection feature. This behavior is confirmed in the Electrical Characteristics table and Typical Operating Characteristics section of the datasheet.
How does the RSEL pin set the output voltage on the MAX17223ELT+?
The MAX17223ELT+ reads the RSEL pin during a 600µs window at startup to detect a single 1% resistor connected to GND, selecting output voltages from 1.8V to 5.0V in 100mV steps (e.g., 133kΩ sets 3.0V). Unlike traditional feedback dividers, this method draws no steady-state current-preserving battery life. The RSEL Selection Table in the datasheet lists all valid resistor values.
Does the MAX17223ELT+ support true output disconnect during shutdown?
Yes-the MAX17223ELT+ features True Shutdown™, which physically disconnects the output from the input with no forward or reverse current path. Total shutdown current is typically 0.5nA, and reverse current is blocked across the full 0V–5V output range. This is verified in the Absolute Maximum Ratings and Electrical Characteristics sections, including ISD_TOTAL measurements.
What is the difference between MAX17222ELT+ and MAX17223ELT+?
The MAX17222ELT+ and MAX17223ELT+ share identical electrical specs (500mA ILIM, 300nA IQ, same package), but differ in EN pin logic: MAX17222 expects EN tied to VIN for enable, while MAX17223 expects EN pulled up externally (e.g., via 33MΩ resistor). This makes MAX17223ELT+ ideal for open-drain GPIO or mechanical switch interfaces with ultra-low system shutdown current.
Can the MAX17223ELT+ operate efficiently at very light loads?
Yes-the MAX17223ELT+ uses a three-mode PFM control scheme (ULPM, LPM, HPM) that achieves >90% efficiency even at 10µA output current. In ULPM, switching frequency drops to ~11.5Hz, minimizing switching losses. This behavior is documented in the PFM Control Scheme section and validated in Typical Operating Characteristics curves for light-load efficiency.
MAX17223ELT+ 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:
- 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+ FAQ
1.How can I place an order for MAX17223ELT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17223ELT+ 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+ reliable?
The price and inventory of MAX17223ELT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17223ELT+ is usually 5 days.
3.What payment methods are accepted for MAX17223ELT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17223ELT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17223ELT+?
MAX17223ELT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17223ELT+ 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+?
For technical support, including MAX17223ELT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17223ELT+ requirements.
6.How does Aetrix verify that MAX17223ELT+ is sourced from the original manufacturer or authorized distributors?
All MAX17223ELT+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX17223ELT+?
All MAX17223ELT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17223ELT+, 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+ part is unused and in its original packaging.
Return procedure for MAX17223ELT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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