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Analog Devices Inc./Maxim Integrated MAX17224ELT+T
- Part No.:
- MAX17224ELT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN
- Datasheet:
-
MAX17224ELT+T.pdf
- Description:
- IC REG BOOST ADJ 1A 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,865
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Product details
Overview
MAX17224ELT+T 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 and delivers up to 95% peak efficiency-designed for ultra-low-power battery systems such as optical heart-rate monitors and supercapacitor-backed RTCs.
For engineers reviewing the MAX17224ELT+T datasheet, MAX17224ELT+T pinout, MAX17224ELT+T application, or MAX17224ELT+T equivalent, key selection criteria include its 1A current limit, 300nA quiescent supply current into OUT, 2mm × 2mm μDFN-6 package, enable transient protection (ETP), and resistor-based output voltage configuration without feedback divider losses.
Technical Context
The MAX17224ELT+T implements a fixed-on-time, current-limited PFM control scheme with automatic mode switching between ultra-low-power mode (ULPM), low-power mode (LPM), and high-power mode (HPM) based on load current. Its 300ns maximum on-time and 1A N-channel switch enable stable regulation even below 0.95V input after startup.
True Shutdown disconnects OUT from IN with no forward or reverse current across VOUT = 0V to 5V, while ETP allows continued regulation during input dips to 400mV post-startup-critical for primary-cell wearables under dynamic load. The RSEL pin reads a single 1% resistor to set output voltage in 100mV steps from 1.8V to 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Inductor Current Limit | 1A - enables use of smaller inductors (e.g., 2.2µH) while supporting higher output currents in portable medical sensors. |
| Quiescent Supply Current (OUT) | 300nA - minimizes battery drain during sensor sleep states, extending shelf life in primary-cell IoT devices. |
| Input Voltage Range | 400mV to 5.5V - supports direct operation from near-dead alkaline, silver oxide, or zinc-air cells without pre-regulation. |
| Output Voltage Range | 1.8V to 5V, 100mV/step - configured via single 1% resistor (e.g., open = 1.8V, 133kΩ = 3.0V), eliminating feedback divider current loss. |
| True Shutdown Current | 0.5nA - ensures zero-load system standby current remains sub-nanoampere when EN = 0V, preserving supercapacitor backup charge. |
| Package | 2mm × 2mm, 6-pin μDFN - provides compact footprint and thermal performance (θJA = 223.6°C/W) for space-constrained wearables. |
| Startup Input Voltage | 0.88V (typ) - allows cold-start from partially discharged primary cells before regulation begins. |
Pinout & Package
MAX17224ELT+T is housed in a 2mm × 2mm, 6-pin µDFN package (package code L622+1C, outline 21-0164) with wettable flanks for automated optical inspection. Pin mapping is validated per Maxim/Analog Devices' official pin configuration diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input power supply connection | Accepts 400mV–5.5V; requires ≥10µF X5R ceramic capacitor to ground for stability and low-ESR filtering. |
| 2 (OUT) | Regulated output node | Delivers 1.8V–5V; connects to 10µF output capacitor and load; disconnected from IN in True Shutdown mode. |
| 3 (GND) | Power and signal reference | Must be tied directly to PCB ground plane with minimal trace length to reduce noise coupling and parasitic resistance. |
| 4 (SEL) | Output voltage selection input | Reads single 1% resistor to GND during startup (600µs detection window); CRSEL < 2pF required for accuracy. |
| 5 (LX) | Switching node | Connects inductor between IN and LX; carries pulsed current up to 1A RMS; requires short, low-inductance routing. |
| 6 (EN) | Active-high enable control | EN ≥ 600mV (typ) enables operation; supports ETP for sustained regulation during input transients down to 400mV. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with full output-to-input isolation and reverse-current blocking across 0–5V VOUT range. |
| Enable Transient Protection (ETP) | Maintains regulated output during input voltage dips to 400mV post-startup-enables robust operation in primary-cell wearables with variable load profiles. |
| Single-Resistor Output Selection (RSEL) | Eliminates feedback divider current loss and reduces BOM count; supports 1.8V–5V in 100mV steps using standard ±1% resistors. |
| NanoPower Quiescent Operation | 300nA IQ into OUT and 0.5nA total IN/LX/EN quiescent current-optimized for multi-year battery life in always-on IoT sensors. |
| PFM Control with Mode Switching | Automatically transitions between ULPM (11.5Hz min freq), LPM, and HPM to maximize efficiency across 1µA–200mA load range. |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
Use Scenario: Primary-cell wearable monitors use pulsed green LEDs requiring stable 3.3V/5V supply while operating from 0.8–1.6V silver oxide or zinc-air batteries. IC Role / Device Role / Timing Role: Boost converter providing regulated LED drive voltage with ultra-low IQ to preserve battery capacity between measurements. Use Value: Enables >2-year battery life by maintaining regulation down to 400mV input and eliminating feedback resistor leakage. |
Use Scenario: Real-time clock or alarm buzzer circuits require uninterrupted 3.3V/5V supply during main power failure, backed by supercapacitors discharging from 5.5V to 400mV. IC Role / Device Role / Timing Role: Step-up regulator sustaining output voltage as supercapacitor voltage decays, with True Shutdown preventing reverse discharge. Use Value: Delivers uniform buzzer tone and accurate timekeeping by regulating down to 400mV input with <0.5nA shutdown current. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
Use Scenario: AAA/AA-powered temperature loggers or environmental sensors operate intermittently over years using alkaline or lithium primary cells. IC Role / Device Role / Timing Role: NanoPower boost converter supplying MCU and sensor rails from declining cell voltage (1.5V → 0.9V). Use Value: Extends usable battery life by starting at 0.88V and drawing only 300nA quiescent current during deep sleep. |
Use Scenario: Sub-mm³ wireless sensor nodes (e.g., BLE beacons) demand minimal solution size and microamp-level average current. IC Role / Device Role / Timing Role: Compact 2mm × 2mm boost IC delivering 3V rail to RF transceiver and MCU from coin-cell or printed battery. Use Value: Achieves <1mm² total solution area with integrated RSEL and eliminates external feedback components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ELT+T | 500mA peak inductor current limit, identical package and pinout, same RSEL interface and ETP capability. | Suitable for lower-current loads (<150mA); less inductor stress and lower thermal rise in space-constrained designs. | Select when output current requirement is ≤150mA and board layout must accommodate same 2mm × 2mm footprint. |
| TPS61291DRVR | 3.5µA typical quiescent current (vs. 300nA), 1.2A current limit, 1.2mm × 0.8mm DSBGA package, no ETP or RSEL. | Higher IQ limits battery life in multi-year deployments; lacks input dip resilience and resistor-based voltage setting. | Consider only if 1.2A current headroom is critical and ultra-low IQ is secondary; verify layout compatibility with smaller DSBGA. |
Compared with MAX17222ELT+T and TPS61291DRVR, the MAX17224ELT+T uniquely combines 1A current capability, 300nA IQ, ETP, and RSEL in a production-proven μDFN package-making it optimal for primary-cell wearables requiring both high pulse current and decade-scale battery longevity.
Availability
MAX17224ELT+T is available at Aetrix Electronics and suitable for optical heart-rate monitoring, supercapacitor RTC backup, and primary-cell portable systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX17224ELT+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 (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The MAX17220–MAX17225 family was engineered specifically for ultra-low-power battery-powered applications-including wearables, medical sensors, and energy-harvesting systems-where nanocurrent operation and minimal solution size are mandatory.
FAQ
What is the minimum input voltage required for MAX17224ELT+T to start up?
The MAX17224ELT+T has a typical startup input voltage of 0.88V at +25°C with a 3kΩ load, enabling reliable cold-start from nearly depleted primary cells. Once running, it continues regulation down to 400mV input depending on load current-critical for maximizing usable battery capacity in wearables and IoT sensors.
How does the RSEL pin configure output voltage on MAX17224ELT+T?
The MAX17224ELT+T uses its SEL pin to detect a single 1% resistor connected to GND during a 600µs startup window, selecting output voltages from 1.8V (open) to 5.0V (short) in 100mV steps. This eliminates feedback divider current loss and simplifies BOM management across multiple voltage variants.
Does MAX17224ELT+T support True Shutdown™, and what is its shutdown current?
Yes, MAX17224ELT+T features True Shutdown™, which fully disconnects OUT from IN with no forward or reverse current path. Its total shutdown current is 0.5nA at +25°C-verified across VOUT = 0V to 5V-ensuring negligible self-discharge in supercapacitor backup and long-term storage applications.
What is Enable Transient Protection (ETP), and which versions of MAX17224ELT+T include it?
ETP is a circuit feature in MAX17224ELT+T that maintains regulated output even when input voltage dips to 400mV after startup-preventing accidental shutdown during battery voltage sag. It is exclusive to MAX17220/MAX17222/MAX17224 variants and requires proper EN pull-up configuration to function.
What package type and dimensions does MAX17224ELT+T use?
MAX17224ELT+T is supplied in a 2mm × 2mm, 6-pin µDFN package (outline 21-0164, land pattern 90-0004) with wettable flanks. This RoHS-compliant package supports automated optical inspection and delivers θJA = 223.6°C/W on a four-layer board-ideal for thermally constrained wearable PCBs.
MAX17224ELT+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:
- 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-µDFN (2x2)
MAX17224ELT+T FAQ
1.How can I place an order for MAX17224ELT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17224ELT+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 MAX17224ELT+T reliable?
The price and inventory of MAX17224ELT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17224ELT+T is usually 5 days.
3.What payment methods are accepted for MAX17224ELT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17224ELT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17224ELT+T?
MAX17224ELT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17224ELT+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 MAX17224ELT+T?
For technical support, including MAX17224ELT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17224ELT+T requirements.
6.How does Aetrix verify that MAX17224ELT+T is sourced from the original manufacturer or authorized distributors?
All MAX17224ELT+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 MAX17224ELT+T meets industry standards.
7.What is the process for return or replacement of MAX17224ELT+T?
All MAX17224ELT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17224ELT+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 MAX17224ELT+T part is unused and in its original packaging.
Return procedure for MAX17224ELT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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