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Analog Devices Inc./Maxim Integrated MAX17222ALT+T
- Part No.:
- MAX17222ALT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN
- Datasheet:
-
MAX17222ALT+T.pdf
- Description:
- IC REG BOOST ADJ 500MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,197
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Product details
Overview
MAX17222ALT+T from Analog Devices is a nanoPower synchronous boost DC-DC converter optimized for ultra-low-quiescent-current battery-powered systems. It delivers 500mA peak inductor current, supports 400mV–5.5V input and 1.8V–5V resistor-selectable output, and features True Shutdown™ with 0.5nA shutdown current. It enables optical heart-rate monitoring LED drivers and supercapacitor-backed RTCs in wearables.
For engineers reviewing the MAX17222ALT+T datasheet, MAX17222ALT+T pinout, MAX17222ALT+T application, or MAX17222ALT+T equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across temperature, real-world efficiency curves at light loads, and precise alternative selection guidance for primary-cell and low-voltage IoT designs.
Technical Context
The MAX17222ALT+T uses a fixed-on-time, current-limited PFM control scheme with 300ns maximum switch on-time and 500mA peak inductor current limit. It operates in three dynamic power modes-ultra-low-power (ULPM), low-power (LPM), and high-power (HPM)-automatically transitioning based on load current to maintain >95% peak efficiency across 100nA–200mA output range.
True Shutdown™ disconnects OUT from IN with no forward or reverse current path; LX leakage remains ≤30nA at +85°C. Enable Transient Protection (ETP) sustains regulation down to 400mV input post-startup, enabled by internal EN biasing circuitry that draws only 61.3nA extra quiescent current with a 33MΩ pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Supply Current (OUT) | 300nA typical - enables multi-year battery life in always-on sensors |
| Shutdown Current | 0.5nA total (IN + LX) - eliminates parasitic drain during system sleep |
| Input Voltage Range | 400mV to 5.5V - starts from single silver-oxide or zinc-air cell; runs down to 400mV under load |
| Output Voltage Range | 1.8V to 5.0V in 100mV steps - set by single ±1% resistor (e.g., 133kΩ for 3.0V) |
| Peak Inductor Current Limit | 500mA - supports 2.2µH inductors for compact 2mm × 2mm µDFN solutions |
| Startup Input Voltage | 0.88V typical - reliable cold-start from depleted primary cells |
| Efficiency (Peak) | 95% - achieved at medium loads while maintaining sub-1µA quiescent draw at light loads |
Pinout & Package
MAX17222ALT+T is housed in a 2mm × 2mm, 6-pin µDFN package (package code L622+1C) with wettable flanks and RoHS-compliant finish. Thermal resistance θJA = 223.6°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output node | Connects to 10µF X5R ceramic capacitor; supplies regulated voltage to load (e.g., BLE radio or OHRM LEDs) |
| 2 (LX) | Switching node | Drives external inductor; requires short, low-inductance trace to minimize EMI and switching losses |
| 3 (GND) | Power ground reference | Must tie directly to input/output capacitor grounds with minimal trace length to avoid noise coupling |
| 4 (SEL) | Output voltage select input | Accepts single 1% resistor to GND; detection time ≤600µs; no continuous divider current |
| 5 (IN) | Input supply rail | Accepts 400mV–5.5V; requires 10µF X5R ceramic capacitor; supports high-impedance primary cells |
| 6 (EN) | Active-high enable | EN ≥600mV (typ) enables operation; ETP feature maintains regulation if IN drops to 400mV post-startup |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with full output-input isolation and reverse-current blocking up to 5V |
| Single-resistor output selection | Eliminates feedback divider network - saves PCB area and removes continuous 1–10µA divider current |
| Enable Transient Protection (ETP) | Maintains regulation when input sags to 400mV after startup - critical for primary-cell voltage droop during sensor bursts |
| Ultra-low-power PFM control | 11.5Hz minimum switching frequency at no load - reduces switching losses and EMI in standby mode |
| Three-mode dynamic power management | Automatically shifts between ULPM (1.49mA transition), LPM, and HPM to sustain >90% efficiency from 100nA to 200mA |
Applications
| Optical Heart-Rate Monitoring (OHRM) | Supercapacitor RTC Backup |
|---|---|
|
Use Scenario: Primary-cell wearable monitors pulse via green/IR LEDs requiring stable 3.3V from 0.8–1.6V silver-oxide battery. IC Role / Device Role / Timing Role: Boost converter supplying regulated 3.3V to MAX30102 LED driver and BLE MCU during brief measurement bursts. Use Value: ETP sustains regulation as battery voltage dips below 1V during LED pulse; 300nA IQ extends runtime beyond 2 years on AAAA cell. |
Use Scenario: Real-time clock preservation during main power loss using 5.5V/0.1F supercapacitor charged from 3.3V rail. IC Role / Device Role / Timing Role: Bidirectional voltage translator - boosts VCAP down to 3.3V when supercap discharges from 5.5V to 400mV. Use Value: True Shutdown blocks reverse current into supercap; 400mV startup allows full energy utilization - extends RTC hold-up to >72 hours. |
| Tiny Low-Power IoT Sensor | Wearable Medical Equipment |
|
Use Scenario: Sub-1cm³ environmental sensor node powered by zinc-air battery, transmitting temperature every 5 minutes via BLE. IC Role / Device Role / Timing Role: Power manager generating 3.0V for MAX30205 sensor and nRF52832 MCU during active measurement and radio transmit. Use Value: 1.8V–5V output range matches BLE SoC VDD requirements; 95% peak efficiency minimizes thermal rise in sealed enclosure. |
Use Scenario: FDA-classified patch monitor measuring ECG/SpO₂ continuously for 72h on single AAA battery. IC Role / Device Role / Timing Role: Primary power stage delivering 2.8V to analog front-end and 3.3V to digital subsystem with <10ppm/h drift. Use Value: Output accuracy ±1.5% in LPM ensures ADC reference stability; 125°C rated operation supports body-worn thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanoPower boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61291DRVR | 350nA IQ, 400mV startup, but only 300mA ILIM and no ETP; uses dual-resistor feedback | Lacks ETP - unsuitable for primary-cell systems with deep voltage sag during load transients | Choose when cost sensitivity outweighs ETP need and peak load ≤150mA |
| ADP5070ACPZ-R7 | 1.2µA IQ, 1.8V min startup, 1.2A ILIM, but requires external MOSFETs and has no True Shutdown | No output disconnect - reverse current flows into depleted battery; larger solution size | Prefer for higher-output-current secondary-cell systems where shutdown leakage is non-critical |
Compared with TPS61291DRVR and ADP5070ACPZ-R7, the MAX17222ALT+T uniquely combines 300nA IQ, 400mV operational input, ETP, and True Shutdown in a 2mm × 2mm µDFN - making it the only option for multi-year primary-cell wearables requiring zero reverse current and robust transient immunity.
Availability
MAX17222ALT+T is available at Aetrix Electronics and suitable for optical heart-rate monitoring, supercapacitor RTC backup, and tiny low-power IoT sensors requiring stable component supply across extended production lifecycles.
Supply support for MAX17222ALT+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 semiconductors, serving precision instrumentation, industrial automation, and medical markets since 1965.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power, space-constrained battery-powered devices - prioritizing nanocurrent operation, minimal bill-of-materials, and seamless integration with primary and supercapacitor energy sources.
FAQ
What is the minimum input voltage required for MAX17222ALT+T to start up?
The MAX17222ALT+T has a typical startup input voltage of 0.88V and is guaranteed to start from 0.95V across temperature. Once running, it continues regulating down to 400mV input depending on load - a key enabler for silver-oxide and zinc-air primary cells. This behavior is confirmed in the Electrical Characteristics table and Typical Operating Characteristics plots on page 6 of the datasheet.
How does MAX17222ALT+T achieve 300nA quiescent current into the output pin?
The MAX17222ALT+T achieves 300nA quiescent current into OUT by using an internal charge-pump bootstrap architecture that draws current from the output rail instead of the input during light-load PFM operation. This eliminates the need for continuous feedback-divider current and is measured under specified conditions: EN open after startup, RSEL open, VOUT = 104% of 1.8V, TA = +25°C.
Does MAX17222ALT+T support true output disconnect during shutdown?
Yes. MAX17222ALT+T implements True Shutdown™, which fully disconnects the output from the input with no forward or reverse current path. Total shutdown current is 0.5nA (IN + LX), and reverse current is blocked across the full 0V–5V VOUT range - verified in Absolute Maximum Ratings and Electrical Characteristics sections.
Can I use the same MAX17222ALT+T part for both 3.0V and 3.3V outputs?
Yes. The MAX17222ALT+T uses a single 1% resistor on the SEL pin to set output voltage: 133kΩ yields 3.0V, 80.6kΩ yields 3.3V. No hardware change beyond the resistor is needed - enabling one BOM item across multiple voltage requirements and eliminating inventory fragmentation.
What package options are available for MAX17222ALT+T, and is the µDFN RoHS-compliant?
MAX17222ALT+T is offered exclusively in the 2mm × 2mm, 6-pin µDFN package (outline 21-0164, land pattern 90-0004). The "+T" suffix confirms tape-and-reel packaging with RoHS-compliant finish. Thermal resistance θJA is 223.6°C/W on a four-layer board, and the package supports automated optical inspection via wettable flanks.
MAX17222ALT+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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (2x2)
MAX17222ALT+T FAQ
1.How can I place an order for MAX17222ALT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17222ALT+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 MAX17222ALT+T reliable?
The price and inventory of MAX17222ALT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17222ALT+T is usually 5 days.
3.What payment methods are accepted for MAX17222ALT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17222ALT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17222ALT+T?
MAX17222ALT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17222ALT+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 MAX17222ALT+T?
For technical support, including MAX17222ALT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17222ALT+T requirements.
6.How does Aetrix verify that MAX17222ALT+T is sourced from the original manufacturer or authorized distributors?
All MAX17222ALT+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 MAX17222ALT+T meets industry standards.
7.What is the process for return or replacement of MAX17222ALT+T?
All MAX17222ALT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17222ALT+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 MAX17222ALT+T part is unused and in its original packaging.
Return procedure for MAX17222ALT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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