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Analog Devices Inc./Maxim Integrated MAX17225ENT+T
- Part No.:
- MAX17225ENT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-XFBGA, WLBGA
- Datasheet:
-
MAX17225ENT+T.pdf
- Description:
- IC REG BOOST ADJ 1A 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX17225ENT+T from Analog Devices is a nanoPower synchronous boost DC-DC converter with True Shutdown™, 1A peak inductor current limit, 300nA quiescent supply current into OUT, and 1.8V–5V resistor-selectable output voltage. It operates from input voltages as low as 400mV post-startup and supports ultra-low-power wearable and medical sensor systems powered by primary cells.
For engineers reviewing the MAX17225ENT+T datasheet, MAX17225ENT+T pinout, MAX17225ENT+T application, or MAX17225ENT+T equivalent, this page delivers verified electrical parameters, validated package mapping (6-pin μDFN), confirmed enable transient protection (ETP), exact RSEL-based output configuration logic, and real-world use cases in optical heart-rate monitoring and supercapacitor RTC backup.
Technical Context
The MAX17225ENT+T 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 1A N-channel MOSFET current limit enable efficient light-load regulation down to 11.5Hz switching frequency.
True Shutdown™ provides bidirectional isolation: 0.5nA total shutdown current, zero reverse current from VOUT = 0V to 5V, and complete disconnection of IN from OUT. The device supports startup from as low as 0.88V (typ) and sustains regulation at VIN ≥ 400mV under defined load conditions when ETP is active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Supply Current into OUT | 300nA - enables multi-year battery life in always-on IoT sensors |
| Peak Inductor Current Limit | 1A - supports higher output power for LED drivers and buzzer loads |
| Input Voltage Range | 400mV to 5.5V - compatible with depleted primary cells (e.g., AAA/AA/Zinc-Air) and Li-ion backup sources |
| Output Voltage Range | 1.8V to 5V in 100mV steps - set via single ±1% resistor (RSEL), eliminating feedback divider current loss |
| Startup Input Voltage | 0.88V (typ) - ensures reliable cold-start from weak or aging batteries |
| True Shutdown Current | 0.5nA total (IN + LX) - preserves energy during system sleep without external blocking diodes |
| Package | 2mm × 2mm, 6-pin μDFN (L622+1C) - enables compact PCB layout for space-constrained wearables |
Pinout & Package
MAX17225ENT+T is housed in a 2mm × 2mm, 6-pin μDFN package (package code L622+1C, outline 21-0164), optimized for minimal board area and thermal performance on four-layer boards (θJA = 223.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output node | Connects to 10µF X5R ceramic capacitor; supplies regulated voltage to load with <±1.5% accuracy in LPM |
| 2 (LX) | Switching node | Drives external 2.2µH inductor; features internal clamps to GND and OUT; RMS current rating ±1A |
| 3 (GND) | Power ground reference | Low-impedance return path; must be connected with shortest possible trace to CIN/COUT ground pads |
| 4 (SEL) | Output voltage selection input | Reads single ±1% resistor to set VOUT (1.8V–5V); detection time ≤600µs; CRSEL < 2pF recommended |
| 5 (IN) | Input power supply | Accepts 400mV–5.5V; requires 10µF X5R ceramic capacitor; supports hot-plug soft-start (1.5ms typ) |
| 6 (EN) | Active-high enable | EN ≥ 600mV (typ) enables operation; includes ETP for stable regulation down to VIN = 400mV post-startup |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with full input-output isolation and no reverse current across 0–5V VOUT range |
| Enable Transient Protection (ETP) | Maintains regulation at VIN ≥ 400mV after startup, enabling robust operation during battery voltage sag |
| RSEL Output Selection | Single ±1% resistor sets VOUT in 100mV increments (1.8V–5V); eliminates static divider current and reduces BOM count |
| PFM Control with Three Modes | Automatically transitions between ULPM (11.5Hz min), LPM, and HPM to maximize efficiency across 100nA–200mA load range |
| NanoPower Operation | 300nA IQ into OUT and 0.5nA ISD_TOTAL ensure >10-year shelf life in battery-backed RTC and alarm applications |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Driver | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
Use Scenario: Primary-cell-powered wearable monitors heart rate using pulsed green LEDs requiring stable 3.3V/5V drive. IC Role / Device Role / Timing Role: Boost converter supplying regulated LED bias voltage while drawing <300nA quiescent current between measurements. Use Value: Enables >2-year battery life using AAA cells; ETP maintains LED brightness during battery voltage droop. |
Use Scenario: Real-time clock or alarm buzzer must remain powered during main supply failure using supercapacitor energy storage. IC Role / Device Role / Timing Role: Ultra-low-IQ boost regulator sustaining 3.3V/5V output as supercap voltage decays from 5.5V down to 400mV. Use Value: Eliminates need for external Schottky diode; True Shutdown prevents supercap self-discharge through IC during standby. |
| Primary-Cell Portable Medical Sensors | Tiny Low-Power IoT Environmental Sensors |
Use Scenario: Disposable glucose or temperature patch uses silver-oxide or zinc-air battery with flat discharge curve. IC Role / Device Role / Timing Role: NanoPower step-up converter powering 1.8V–3.3V MCU and analog front-end from 0.9–1.6V battery. Use Value: 0.88V startup and 400mV operational floor extract maximum usable energy; RSEL simplifies SKU management across product variants. |
Use Scenario: Sub-gram wireless sensor node transmits temperature/humidity data every 5 minutes using BLE. IC Role / Device Role / Timing Role: Efficient boost stage delivering 3V to BLE SoC during 10ms transmit bursts, then dropping to ULPM between transmissions. Use Value: 95% peak efficiency and 300nA IQ extend coin-cell lifetime beyond 5 years; 2mm × 2mm μDFN fits inside 10mm-diameter enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanoPower boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ENT+ | 500mA peak inductor current limit; identical package, pinout, and RSEL interface | Lower output current capability; suitable for <150mA loads (e.g., BLE radios only) | Select when peak load current is ≤150mA and cost optimization is prioritized over headroom |
| TPS61291DRVR | 200nA IQ, 1.8V–5.5V output, but no True Shutdown (reverse leakage ~100nA); 1.2mm × 1.6mm WSON-6 | Lacks bidirectional isolation; unsuitable for supercapacitor backup where reverse current must be <1nA | Choose only for non-critical backup applications where footprint reduction outweighs shutdown integrity requirements |
Compared with MAX17222ENT+, the MAX17225ENT+T delivers 2× peak current headroom for driving high-pulse LED loads; versus TPS61291DRVR, it guarantees true zero-reverse-current shutdown critical for energy-harvesting and supercapacitor systems.
Availability
MAX17225ENT+T is available at Aetrix Electronics and suitable for optical heart-rate monitoring, supercapacitor RTC backup, and primary-cell portable medical equipment requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX17225ENT+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 healthcare markets.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power battery-operated systems-prioritizing nanoamp quiescent current, sub-1V startup, and True Shutdown™ to maximize usable energy from primary and thin-film batteries.
FAQ
What is the minimum input voltage required for MAX17225ENT+T to start up?
The MAX17225ENT+T has a typical startup input voltage of 0.88V and is guaranteed to start from 0.95V across temperature. Once running, it continues regulation down to 400mV input under defined load conditions due to Enable Transient Protection (ETP). This makes MAX17225ENT+T ideal for deeply discharged primary cells like zinc-air or silver-oxide batteries commonly used in medical patches.
How does the RSEL pin configure the output voltage on MAX17225ENT+T?
The RSEL pin on MAX17225ENT+T reads a single standard ±1% resistor connected to GND to set the output voltage from 1.8V to 5V in 100mV steps-e.g., 133kΩ yields 3.0V, open circuit yields 1.8V, short yields 5.0V. Detection occurs within 600µs at startup, consuming ≤200µA briefly; no continuous current flows through RSEL, preserving battery life in always-on applications.
Does MAX17225ENT+T support True Shutdown™, and what does that mean for system design?
Yes, MAX17225ENT+T implements True Shutdown™: when disabled, it draws just 0.5nA total (IN + LX), fully disconnects IN from OUT, and blocks reverse current across the full 0–5V VOUT range. This eliminates the need for external blocking diodes in supercapacitor backup or energy-harvesting systems-directly improving system efficiency and simplifying PCB layout.
What package type and dimensions does MAX17225ENT+T use?
MAX17225ENT+T is supplied in a 2mm × 2mm, 6-pin µDFN package (package code L622+1C, outline 21-0164) with 0.5mm pitch. This RoHS-compliant, thermally enhanced package supports high-density layouts in wearables and miniature IoT sensors, and its land pattern (90-0004) is optimized for four-layer board thermal performance (θJA = 223.6°C/W).
Can MAX17225ENT+T drive a 5V buzzer from a 1.2V NiMH cell?
Yes-MAX17225ENT+T supports input voltages from 400mV to 5.5V and delivers up to 5V output. With its 1A peak inductor current limit and 95% peak efficiency, it can sustain 5V at >100mA for buzzer actuation. Use a 2.2µH inductor and 10µF X5R ceramics on IN/OUT; configure RSEL for 5V (short to GND) and verify load transient response per Figure 11 in the datasheet.
MAX17225ENT+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:
- 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+T FAQ
1.How can I place an order for MAX17225ENT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17225ENT+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 MAX17225ENT+T reliable?
The price and inventory of MAX17225ENT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17225ENT+T is usually 5 days.
3.What payment methods are accepted for MAX17225ENT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17225ENT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17225ENT+T?
MAX17225ENT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17225ENT+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 MAX17225ENT+T?
For technical support, including MAX17225ENT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17225ENT+T requirements.
6.How does Aetrix verify that MAX17225ENT+T is sourced from the original manufacturer or authorized distributors?
All MAX17225ENT+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 MAX17225ENT+T meets industry standards.
7.What is the process for return or replacement of MAX17225ENT+T?
All MAX17225ENT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17225ENT+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 MAX17225ENT+T part is unused and in its original packaging.
Return procedure for MAX17225ENT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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