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Analog Devices Inc./Maxim Integrated MAX17222ENT+T
- Part No.:
- MAX17222ENT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-XFBGA, WLBGA
- Datasheet:
-
MAX17222ENT+T.pdf
- Description:
- IC REG BOOST ADJ 500MA 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:7,517
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Product details
Overview
MAX17222ENT+T from Analog Devices is a nanoPower synchronous boost DC-DC converter with True Shutdown™, 500mA peak inductor current limit, 300nA quiescent supply current into OUT, and 0.88V minimum startup voltage. It operates from 400mV to 5.5V input and delivers 1.8V–5V output via single 1% resistor selection, enabling ultra-long battery life in optical heart-rate monitoring LED drivers and primary-cell IoT sensors.
For engineers reviewing the MAX17222ENT+T datasheet, MAX17222ENT+T pinout, MAX17222ENT+T application, or MAX17222ENT+T equivalent, this page provides verified technical context, validated pin functions, confirmed ETP-enabled operation down to 400mV post-startup, and real-world alternatives for low-power wearable and medical sensor designs.
Technical Context
The MAX17222ENT+T implements a fixed-on-time, current-limited PFM control scheme with three operating modes (ULPM, LPM, HPM) that automatically transition based on load current. Its 300ns maximum on-time and 500mA N-channel switch current limit enable high efficiency across microamp-to-milliamp loads.
True Shutdown™ disconnects OUT from IN with 0.5nA total shutdown current and zero reverse current over 0V–5V VOUT range. Enable Transient Protection (ETP) maintains regulation when VIN drops to 400mV after startup-confirmed only for MAX17222 (not MAX17223), per device-specific functional description.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Supply Current into OUT | 300nA typical - enables >10-year battery life in always-on sensor nodes |
| Peak Inductor Current Limit | 500mA - supports 2.2µH inductors for compact 2mm × 2mm µDFN solutions |
| Input Voltage Range | 400mV to 5.5V - powers directly from depleted primary cells (e.g., AAA/AA/Zinc-Air) |
| Minimum Startup Voltage | 0.88V typical - starts from single silver-oxide or alkaline cell at end-of-life |
| Output Voltage Range | 1.8V to 5.0V in 100mV steps - set by single 1% resistor (e.g., 133kΩ for 3.0V) |
| True Shutdown Current | 0.5nA total (IN + LX) - eliminates leakage paths during system sleep |
| Package | 2mm × 2mm, 6-pin µDFN (L622+1C) - compatible with fine-pitch automated assembly |
Pinout & Package
MAX17222ENT+T uses a 2mm × 2mm, 6-pin µDFN package (package code L622+1C, outline 21-0164). Thermal resistance θJA = 223.6°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output node | Connects to 10µF X5R ceramic capacitor; supplies power to load with ±1.5% accuracy in LPM |
| 2 (LX) | Switching node | Drives external inductor; rated for 1ARMS continuous; internal clamps to GND/OUT prevent overvoltage |
| 3 (GND) | Power ground reference | Low-impedance return path for IN, OUT, and LX currents; must be short-traced to CIN/COUT grounds |
| 4 (SEL) | Output voltage select input | Reads single 1% resistor value at startup (600µs detection time); no current draw during operation |
| 5 (IN) | Input power source | Accepts 400mV–5.5V; requires 10µF X5R ceramic capacitor; supports hot-plug with soft-start |
| 6 (EN) | Active-high enable | EN ≥ 600mV (typ) enables operation; ETP active post-startup allows VIN drop to 400mV without shutdown |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with bidirectional blocking - preserves supercapacitor backup charge and prevents reverse discharge |
| Enable Transient Protection (ETP) | Maintains regulation at VIN = 400mV post-startup - eliminates need for external undervoltage lockout in wearables |
| Single-resistor output selection (RSEL) | Eliminates feedback divider current loss - saves ~1µA vs. dual-resistor topology in 10-year battery applications |
| Ultra-low quiescent current | 300nA into OUT - enables >10-year runtime on CR2032 in BLE temperature sensors |
| PFM control with 3 operating modes | ULPM (11.5Hz min freq), LPM, HPM - adapts switching behavior to load without external mode control |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
Use Scenario: Primary-cell wearable monitors pulse oximetry using pulsed LEDs requiring stable 3.3V/5V from 0.8–1.6V silver-oxide or zinc-air cells. IC Role / Device Role / Timing Role: Boost converter providing regulated LED supply while maintaining sub-1µA system sleep current. Use Value: Enables 2+ year battery life with ETP sustaining LED drive during low-VIN transients (e.g., cold-weather cell voltage sag). |
Use Scenario: Real-time clock or alarm buzzer powered from supercapacitor charged by main battery, requiring regulated 3.3V/5V as main supply depletes. IC Role / Device Role / Timing Role: Bidirectionally isolated boost regulator preserving backup charge during main supply brownout. Use Value: True Shutdown blocks reverse current, extending supercapacitor hold-up time by >30% vs. diode-based solutions. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
Use Scenario: AAA/AA-powered environmental sensor node with BLE radio, operating from fresh to end-of-life cell voltage (1.5V → 0.9V). IC Role / Device Role / Timing Role: Main power rail generator delivering 3.0V to MCU and radio with <1µA quiescent overhead. Use Value: 0.88V startup and 400mV operating minimum allow full utilization of primary cell capacity - adds ~15% usable energy. |
Use Scenario: Coin-cell-powered soil moisture or temperature sensor transmitting data every 10 minutes using ultra-low-duty-cycle BLE. IC Role / Device Role / Timing Role: Power management IC enabling 10-year deployment without battery replacement. Use Value: 300nA IQ_OUT and RSEL-based zero-static-current feedback reduce average system current to <500nA in deep sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17220ENT+T | 225mA peak inductor current limit; same 300nA IQ_OUT and ETP capability | Better suited for sub-100mA loads (e.g., simple RTC backup) where smaller inductor size is critical | Select when lower peak current and reduced solution size outweigh higher output current needs |
| MAX17224ENT+T | 1A peak inductor current limit; identical package, pinout, and ETP functionality | Required for >200mA loads (e.g., multi-LED OHRM, high-brightness buzzers) with same PCB footprint | Choose for higher output current without layout change - direct upgrade path within same family |
Compared with MAX17220ENT+T and MAX17224ENT+T, the MAX17222ENT+T offers optimal balance of output current (500mA), ultra-low IQ (300nA), and ETP-enabled robustness for mid-range wearable and sensor applications - avoiding overdesign or underperformance.
Availability
MAX17222ENT+T is available at Aetrix Electronics and suitable for optical heart-rate monitoring systems, supercapacitor-backed RTC modules, and primary-cell IoT sensors requiring stable component supply with guaranteed long-term availability.
Supply support for MAX17222ENT+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 is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power battery-operated devices - prioritizing nanoamp quiescent current, minimal solution size, and reliable startup from near-dead cells.
FAQ
What is the minimum input voltage required for MAX17222ENT+T to start up?
The MAX17222ENT+T has a typical minimum startup input voltage of 0.88V at +25°C with RL ≥ 3kΩ, as confirmed in the Electrical Characteristics table. This allows reliable startup from nearly depleted primary cells such as silver-oxide or alkaline batteries. The device then continues operating down to 400mV post-startup due to Enable Transient Protection, but startup itself requires ≥0.88V under standard test conditions.
Does MAX17222ENT+T support true output disconnect during shutdown?
Yes, MAX17222ENT+T implements True Shutdown™ with 0.5nA total shutdown current (IN + LX) and complete bidirectional isolation between IN and OUT. When EN is low, no forward or reverse current flows - even with VOUT ranging from 0V to 5V - making it ideal for supercapacitor backup and zero-leakage sleep modes.
How is the output voltage set on MAX17222ENT+T?
The MAX17222ENT+T uses a single 1% resistor connected between SEL and GND to set output voltage from 1.8V to 5.0V in 100mV steps. For example, a 133kΩ resistor configures 3.0V output. The device reads RSEL only during a 600µs detection window at startup, drawing no current during normal operation - eliminating static power loss from traditional feedback dividers.
What package type does MAX17222ENT+T use, and what are its thermal characteristics?
MAX17222ENT+T uses a 2mm × 2mm, 6-pin µDFN package (code L622+1C, outline 21-0164). On a 4-layer board, its junction-to-ambient thermal resistance (θJA) is 223.6°C/W, and junction-to-case (θJC) is 122°C/W. This compact RoHS-compliant package supports fine-pitch SMT assembly and meets requirements for space-constrained wearables and medical sensors.
Is MAX17222ENT+T compatible with primary-cell chemistries like zinc-air or silver-oxide?
Yes, MAX17222ENT+T is explicitly qualified for primary-cell systems including zinc-air, silver-oxide, and alkaline batteries. Its 400mV–5.5V input range, 0.88V startup voltage, and ETP functionality ensure stable operation across the full discharge curve - from fresh 1.5V cells down to end-of-life voltages below 1.0V, as validated in Application Figures 7–9.
MAX17222ENT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-XFBGA, WLBGA
- 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-WLP (1.42x0.89)
MAX17222ENT+T FAQ
1.How can I place an order for MAX17222ENT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17222ENT+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 MAX17222ENT+T reliable?
The price and inventory of MAX17222ENT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17222ENT+T is usually 5 days.
3.What payment methods are accepted for MAX17222ENT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17222ENT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17222ENT+T?
MAX17222ENT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17222ENT+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 MAX17222ENT+T?
For technical support, including MAX17222ENT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17222ENT+T requirements.
6.How does Aetrix verify that MAX17222ENT+T is sourced from the original manufacturer or authorized distributors?
All MAX17222ENT+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 MAX17222ENT+T meets industry standards.
7.What is the process for return or replacement of MAX17222ENT+T?
All MAX17222ENT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17222ENT+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 MAX17222ENT+T part is unused and in its original packaging.
Return procedure for MAX17222ENT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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