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Analog Devices Inc./Maxim Integrated MAX17225ALT+
- Part No.:
- MAX17225ALT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN
- Datasheet:
-
MAX17225ALT+.pdf
- Description:
- IC REG BOOST ADJ 1A 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
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Product details
Overview
The MAX17225ALT+ from Analog Devices is a nanoPower synchronous boost DC-DC converter with 1A peak inductor current limit, True Shutdown™ (0.5nA shutdown current), and single-resistor-selectable output voltage (1.8V–5.0V). It operates from input voltages as low as 400mV post-startup and starts reliably at 0.88V, making it ideal for primary-cell-powered wearable medical sensors and optical heart-rate monitors.
For engineers reviewing the MAX17225ALT+ datasheet, MAX17225ALT+ pinout, MAX17225ALT+ application, or MAX17225ALT+ equivalent, this page delivers verified electrical parameters, validated WLP package dimensions, confirmed enable transient protection behavior, and real-world design constraints for ultra-low-power battery systems requiring <1µA system quiescent current and sub-1V cold-start capability.
Technical Context
The MAX17225ALT+ 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 minimum on-time and 1A N-channel switch (RDS(ON) = 31mΩ typical at VOUT = 3.3V) enable high efficiency across 100nA–200mA loads.
True Shutdown disconnects OUT from IN with no forward or reverse current flow, while internal ETP circuitry maintains regulation down to 400mV input when enabled-critical for maintaining RTC backup or LED driver bias during battery voltage sag. The device uses a single 1% resistor on SEL to set output voltage without continuous feedback divider current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Supply Current (OUT) | 300nA typical - enables >10-year battery life in always-on sensor nodes |
| Shutdown Current | 0.5nA typical - eliminates leakage-driven drain in storage or sleep states |
| Input Voltage Range | 400mV to 5.5V - supports direct operation from depleted alkaline/zinc-air cells |
| Output Voltage Range | 1.8V to 5.0V in 100mV steps - set by single 1% resistor, no divider current loss |
| Peak Inductor Current Limit | 1A - allows use of small 2.2µH inductors while delivering >200mA at 3V out |
| Startup Input Voltage | 0.88V typical - ensures reliable cold-start from single silver-oxide or AAA cell |
| Package | 0.88mm × 1.4mm, 6-bump WLP (2×3, 0.4mm pitch) - ultra-compact footprint for wearables |
Pinout & Package
MAX17225ALT+ uses the 0.88mm × 1.4mm, 6-bump Wafer-Level Package (WLP) with 0.4mm pitch and bottom-side thermal pad. This package enables PCB area savings over μDFN while maintaining thermal performance (θJA = 95.15°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT | Regulated output node | Connects to 10µF X5R ceramic capacitor; supplies load with ±1.5% accuracy in LPM |
| LX | Switching node | Drives external inductor; rated for ±1.6A RMS; clamped internally to GND and OUT |
| GND | Power and signal reference | Must be connected via shortest possible path to CIN/COUT ground pads to minimize noise |
| EN | Active-high enable input | Supports push-pull GPIO drive; enables ETP for sustained regulation down to 400mV input |
| IN | Input power supply | Accepts 400mV–5.5V; requires ≥2µF X5R ceramic bypass; high-impedance during True Shutdown |
| SEL | Output voltage selection | Reads resistor value at startup only (600µs); draws zero steady-state current after configuration |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with full output-input isolation and reverse-current blocking up to 5V |
| Enable Transient Protection (ETP) | Maintains regulated output down to 400mV input after startup-prevents brownout-induced reset in primary-cell systems |
| RSEL single-resistor programming | Eliminates continuous divider current loss; supports 33 standard output voltages from 1.8V–5.0V using ±1% resistors |
| PFM multi-mode control | Automatically transitions between ULPM (11.5Hz min freq), LPM, and HPM to optimize efficiency across 100nA–200mA loads |
| NanoPower architecture | 300nA quiescent current into OUT + 0.5nA shutdown current enables >10-year shelf life in coin-cell applications |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
|
Use Scenario: Primary-cell wearable with MAX30101/MAX30102 sensor driving green/red LEDs at 50mA pulses. IC Role / Device Role / Timing Role: Boost converter supplying stable 3.3V LED bias from 0.9–1.6V silver-oxide cell; provides ETP-enabled regulation during pulse discharge sag. Use Value: Enables >2-week runtime on AAA cell by eliminating feedback divider loss and sustaining LED brightness down to 400mV input. |
Use Scenario: Real-time clock (DS1341) or piezo buzzer requiring uninterrupted 3.3V/5V supply during main battery removal. IC Role / Device Role / Timing Role: Bidirectional energy manager: charges supercap from main source, then boosts supercap voltage to maintain regulated output as supercap discharges from 5V to 400mV. Use Value: Delivers >100 hours of RTC hold-up or uniform alarm tone without reverse current leakage or voltage droop below 3.3V. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
|
Use Scenario: Bluetooth LE temperature sensor (MAX30205 + nRF52832) powered by zinc-air or alkaline AAA cell. IC Role / Device Role / Timing Role: Supplies 3.0V to MCU and radio from 0.8–1.6V input; enters ULPM between BLE advertisements to minimize avg. current. Use Value: Reduces average system current to <1µA, enabling 5+ years of operation on single AAA cell with 10-second BLE interval. |
Use Scenario: Sub-1cm³ environmental sensor node (humidity/pressure) harvesting energy from ambient light or vibration. IC Role / Device Role / Timing Role: Ultra-low-IQ booster that starts from 0.88V and regulates 2.5V rail for ADC and transceiver during microsecond wake windows. Use Value: Minimizes startup energy penalty and enables reliable operation from intermittent microwatt harvesters with <100mV open-circuit voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanoPower boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17224ALT+ | Same WLP package, identical pinout and RSEL interface, but 1A ILIM with slightly higher RDS(ON) (70mΩ vs 31mΩ) and no ETP | Lacks enable transient protection; cannot sustain regulation below ~0.95V post-startup | Select MAX17224ALT+ only if ETP is unnecessary and cost sensitivity outweighs cold-sag resilience |
| Texas Instruments TPS61291DRVR | 2.5V–5.5V input range; 400nA IQ; no True Shutdown (reverse current flows); 0.5A ILIM; 2mm × 2mm DSBGA | Cannot start below 2.5V or regulate below 2.5V input; unsuitable for primary-cell cold-start or supercap backup | Choose TPS61291DRVR only for secondary-cell systems where input never drops below 2.5V and reverse-current blocking is handled externally |
Compared with MAX17224ALT+, the MAX17225ALT+ adds ETP for robustness against input sag in primary-cell systems; compared with TPS61291DRVR, it delivers true 400mV operation, 0.5nA shutdown, and integrated reverse-current blocking-enabling designs impossible with either alternative.
Availability
MAX17225ALT+ is available at Aetrix Electronics and suitable for optical heart-rate monitoring wearables, supercapacitor-backed RTC modules, primary-cell IoT sensors, and battery-powered medical equipment requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX17225ALT+ 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 automation, and low-power sensing markets.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power battery-operated devices-prioritizing sub-1µA quiescent current, sub-1V startup, and minimal solution size in WLP packaging for wearables and medical sensors.
FAQ
What is the minimum input voltage required for the MAX17225ALT+ to start up and regulate?
The MAX17225ALT+ 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-enabled by its ETP circuitry-making it uniquely suited for deeply discharged primary cells.
Does the MAX17225ALT+ support true output disconnect during shutdown?
Yes. The MAX17225ALT+ features True Shutdown™, which physically disconnects the output from the input using internal switches. This results in 0.5nA typical total shutdown current and blocks reverse current flow even when VOUT is held at 0V–5V, preserving battery charge during storage or system sleep.
How is the output voltage programmed on the MAX17225ALT+?
The MAX17225ALT+ uses a single-resistor selection method (RSEL): a standard ±1% resistor connected from SEL to GND sets the output voltage during a brief 600µs detection window at startup. No continuous divider current is drawn-unlike traditional feedback networks-preserving nanoamp-level system efficiency.
What package type does the MAX17225ALT+ use, and what are its key mechanical dimensions?
The MAX17225ALT+ uses the 0.88mm × 1.4mm, 6-bump Wafer-Level Package (WLP) with 0.4mm pitch and bottom thermal pad (package code N60E1+1). Its compact size and low profile (0.37mm max height) make it ideal for space-constrained wearables and medical patches where PCB area is at a premium.
Can the MAX17225ALT+ operate efficiently across both ultra-light and medium-load conditions?
Yes. The MAX17225ALT+ employs a three-mode PFM control scheme-ultra-low-power mode (ULPM), low-power mode (LPM), and high-power mode (HPM)-that automatically transitions based on load current. It achieves 95% peak efficiency at medium loads and maintains >70% efficiency even at 100nA output current, ensuring optimal performance from standby to active transmission.
MAX17225ALT+ 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:
- 1A (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)
MAX17225ALT+ FAQ
1.How can I place an order for MAX17225ALT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17225ALT+ 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 MAX17225ALT+ reliable?
The price and inventory of MAX17225ALT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17225ALT+ is usually 5 days.
3.What payment methods are accepted for MAX17225ALT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17225ALT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17225ALT+?
MAX17225ALT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17225ALT+ 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 MAX17225ALT+?
For technical support, including MAX17225ALT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17225ALT+ requirements.
6.How does Aetrix verify that MAX17225ALT+ is sourced from the original manufacturer or authorized distributors?
All MAX17225ALT+ 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 MAX17225ALT+ meets industry standards.
7.What is the process for return or replacement of MAX17225ALT+?
All MAX17225ALT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17225ALT+, 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 MAX17225ALT+ part is unused and in its original packaging.
Return procedure for MAX17225ALT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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