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Analog Devices Inc./Maxim Integrated MAX17225ENT+
- Part No.:
- MAX17225ENT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-XFBGA, WLBGA
- Datasheet:
-
MAX17225ENT+.pdf
- Description:
- IC REG BOOST ADJ 1A 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,338
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Product details
Overview
The MAX17225ENT+ 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–5V). It operates from 400mV input down to startup at 0.88V, delivers up to 95% peak efficiency, and targets ultra-low-power battery systems such as optical heart-rate monitors and supercapacitor-backed RTCs.
For engineers reviewing the MAX17225ENT+ datasheet, MAX17225ENT+ pinout, MAX17225ENT+ application, or MAX17225ENT+ equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across temperature, real-world application constraints for wearable medical sensors, and two rigorously cross-checked alternative parts with documented functional and packaging differences.
Technical Context
The MAX17225ENT+ employs 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 enable stable regulation from 400mV input while maintaining 300nA quiescent supply current into OUT.
True Shutdown™ disconnects IN from OUT with no forward or reverse current path, supported by internal clamps on LX to GND and OUT. The device uses a single 1% resistor on SEL to set output voltage in 100mV steps across 1.8V–5V, eliminating feedback divider current loss and enabling inventory consolidation across multiple voltage requirements.
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) and supercapacitors down to 400mV. |
| Output Voltage Range | 1.8V to 5V - selectable in 100mV steps via single 1% resistor on SEL pin; eliminates need for dual-resistor feedback network. |
| Peak Inductor Current Limit | 1A - enables higher output power delivery and compatibility with lower-inductance, smaller-footprint inductors (e.g., 1µH–3.3µH). |
| Quiescent Supply Current (OUT) | 300nA typical - ensures minimal battery drain during sensor sleep cycles in IoT wearables and medical devices. |
| Shutdown Current | 0.5nA total (IN + LX) - achieves near-zero system leakage when disabled, critical for multi-year battery life in maintenance-free devices. |
| Startup Input Voltage | 0.88V typical - allows reliable cold-start from weak or aging primary cells without external charge pump assistance. |
| Package | 2mm × 2mm, 6-pin µDFN - compact footprint compatible with space-constrained wearable PCBs and high-density sensor modules. |
Pinout & Package
MAX17225ENT+ is housed in a 2mm × 2mm, 6-pin µDFN package (package code L622+1C, outline 21-0164) with exposed thermal pad. Pin pitch is 0.5mm; land pattern follows JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Power Supply | Accepts 400mV–5.5V; requires ≥10µF X5R ceramic capacitor to ground for stability and EMI suppression. |
| 2 (OUT) | Regulated Output | Delivers 1.8V–5V; connects to 10µF output capacitor and load; isolated from IN during True Shutdown™. |
| 3 (GND) | Ground Reference | Primary return path for power and control circuits; must be connected directly to low-impedance ground plane under IC. |
| 4 (SEL) | Output Voltage Select | Single-point connection to 1% resistor to GND; detection time ≤600µs; CRSEL < 2pF required for accuracy. |
| 5 (EN) | Active-High Enable | Drives internal startup sequence; supports push-pull or open-drain GPIO; enables transient protection (ETP) in MAX17225. |
| 6 (LX) | Switching Node | Connects to inductor; carries pulsed 1A peak current; requires short, low-inductance trace to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with full output-input isolation and reverse-current blocking from 0V to 5V VOUT. |
| Single-Resistor Output Selection | 1% resistor on SEL sets 1.8V–5V output in 100mV steps; eliminates feedback divider current loss and reduces BOM count. |
| Enable Transient Protection (ETP) | Allows IN to drop to 400mV post-startup while maintaining regulation - prevents false shutdown during battery voltage sag. |
| Ultra-Low Quiescent Current | 300nA IQ into OUT enables >10-year battery life in intermittent-sensing applications like wearable medical monitors. |
| PFM Control with Three Modes | Automatically transitions between ULPM (11.5Hz min freq), LPM, and HPM based on load - maximizes efficiency across 100nA–200mA range. |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
|
Use Scenario: Primary-cell-powered wearable OHRM sensor using MAX30102/MAX30101, requiring stable 3.3V LED drive from 0.8V–1.6V battery. IC Role / Device Role / Timing Role: Boost converter providing regulated 3.3V rail with sub-µA quiescent draw during photodiode sampling intervals. Use Value: Enables continuous 24/7 optical sensing on AAA/AAAA silver-oxide cells with >2-year runtime; ETP prevents dropout during pulse-driven LED bursts. |
Use Scenario: Real-time clock (DS1341) or alarm buzzer powered from supercapacitor charged by main battery; must maintain 3.3V/5V output as supercap voltage decays from 5.5V to 400mV. IC Role / Device Role / Timing Role: Ultra-low-IQ boost regulator acting as reverse-current-blocking backup supply during main power loss. Use Value: Delivers regulated output down to 400mV supercap voltage with 0.5nA shutdown leakage - extends RTC hold-up time by >3× vs. standard boosters. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
|
Use Scenario: Temperature/humidity sensor node (e.g., MAX30205 + Cortex-M4) powered by zinc-air or silver-oxide coin cell (0.9V–1.6V). IC Role / Device Role / Timing Role: Primary power conversion stage generating 3V for MCU and radio; starts reliably at 0.88V. Use Value: Eliminates need for voltage supervisor or external wake-up circuitry; 300nA IQ extends usable battery capacity by >40% over competing nanoPower boosters. |
Use Scenario: Sub-gram environmental sensor tag transmitting data every 5 minutes via BLE; powered by single AAA alkaline cell. IC Role / Device Role / Timing Role: Energy-harvesting-adjacent boost regulator supplying 2.7V–3.3V to BLE SoC (e.g., nRF52832) during brief transmit windows. Use Value: 95% peak efficiency at 10mA and 1A ILIM support fast recharge of output cap between transmissions - reduces average supply current by 22% vs. 500mA-limit alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ELT+ | 500mA peak inductor current limit; same 2mm × 2mm µDFN package; identical pinout and SEL interface. | Lower output current capability limits use in high-brightness LED drivers or buzzer loads >150mA. | Select when 500mA ILIM suffices and cost optimization is prioritized over maximum power density. |
| TPS61291DRVR | 3.5µA quiescent current (vs. 300nA); 1.8V–5.5V output; 1.2A ILIM; 2mm × 2mm WSON-6 package; no True Shutdown™. | Lacks reverse-current blocking and sub-µA shutdown - unsuitable for multi-year RTC backup or zero-leakage standby. | Choose only if higher IQ is acceptable and True Shutdown™ is not required; verify layout compatibility with WSON-6 thermal pad. |
Compared with MAX17222ELT+, the MAX17225ENT+ delivers double the peak current for driving higher-power peripherals without changing PCB layout; versus TPS61291DRVR, it achieves 11.7× lower quiescent current and adds critical reverse-current isolation for energy-sensitive backup systems.
Availability
MAX17225ENT+ is available at Aetrix Electronics and suitable for optical heart-rate monitoring, supercapacitor-backed RTCs, and primary-cell portable systems requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX17225ENT+ 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. 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, space-constrained battery-powered applications - emphasizing nanoPower operation, minimal external components, and robust startup from depleted primary cells.
FAQ
What is the minimum input voltage required for the MAX17225ENT+ to start up?
The MAX17225ENT+ has a typical startup input voltage of 0.88V at +25°C with RL ≥ 3kΩ, and guarantees operation down to 400mV after startup depending on load current. This enables reliable cold-start from nearly exhausted silver-oxide or zinc-air cells, making the MAX17225ENT+ ideal for long-life primary-cell systems where voltage sag is common.
How does True Shutdown™ function in the MAX17225ENT+?
True Shutdown™ in the MAX17225ENT+ physically disconnects the output from the input using internal switches, resulting in 0.5nA total shutdown current (IN + LX) and zero forward or reverse current flow - even when VOUT ranges from 0V to 5V. This feature is critical for preserving battery energy in multi-year wearable and medical devices where standby leakage must be minimized.
Can the MAX17225ENT+ be used with supercapacitors for RTC backup?
Yes - the MAX17225ENT+ is explicitly validated for supercapacitor backup applications, regulating a stable 3.3V or 5V output as the supercap voltage decays from 5.5V down to 400mV. Its True Shutdown™ blocks reverse current, and its 300nA quiescent current ensures minimal self-discharge, extending RTC hold-up time significantly beyond conventional boost converters.
What is the role of the SEL pin on the MAX17225ENT+?
The SEL pin on the MAX17225ENT+ accepts a single 1% resistor to ground to set the output voltage in precise 100mV steps from 1.8V to 5V. This replaces traditional dual-resistor feedback networks, eliminating continuous divider current loss and enabling one BOM item to serve multiple voltage requirements - reducing inventory complexity and PCB area in multi-voltage designs.
Does the MAX17225ENT+ support enable transient protection (ETP)?
Yes - the MAX17225ENT+ includes Enable Transient Protection (ETP), allowing the input voltage to drop as low as 400mV after startup while maintaining regulation, provided the EN pin is driven appropriately (e.g., via pushbutton or pullup resistor). This prevents false shutdown during battery voltage sags in portable systems, improving system reliability without increasing quiescent current unnecessarily.
MAX17225ENT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-XFBGA, WLBGA
- 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:
- 1A (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)
MAX17225ENT+ FAQ
1.How can I place an order for MAX17225ENT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17225ENT+ 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 MAX17225ENT+ reliable?
The price and inventory of MAX17225ENT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17225ENT+ is usually 5 days.
3.What payment methods are accepted for MAX17225ENT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17225ENT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17225ENT+?
MAX17225ENT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17225ENT+ 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 MAX17225ENT+?
For technical support, including MAX17225ENT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17225ENT+ requirements.
6.How does Aetrix verify that MAX17225ENT+ is sourced from the original manufacturer or authorized distributors?
All MAX17225ENT+ 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 MAX17225ENT+ meets industry standards.
7.What is the process for return or replacement of MAX17225ENT+?
All MAX17225ENT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17225ENT+, 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 MAX17225ENT+ part is unused and in its original packaging.
Return procedure for MAX17225ENT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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