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Analog Devices Inc./Maxim Integrated MAX17223ENT+
- Part No.:
- MAX17223ENT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-XFBGA, WLBGA
- Datasheet:
-
MAX17223ENT+.pdf
- Description:
- IC REG BOOST ADJ 500MA 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,678
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Product details
Overview
MAX17223ENT+ 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-enabling multi-year operation in optical heart-rate monitoring (OHRM) LED drivers and wearable medical sensors.
For engineers reviewing the MAX17223ENT+ datasheet, MAX17223ENT+ pinout, MAX17223ENT+ application, or MAX17223ENT+ equivalent, this page provides verified technical context, validated pin functions, real-world application constraints, and confirmed alternative parts for primary-cell and supercapacitor backup designs requiring sub-1µA system quiescent current and <0.9V startup capability.
Technical Context
The MAX17223ENT+ implements a fixed-on-time, current-limited PFM control scheme with three operating modes (ULPM/LPM/HPM) automatically selected by load current. Its 300ns minimum on-time and 500mA peak inductor current limit enable stable regulation down to 400mV input under light loads while maintaining 95% peak efficiency.
True Shutdown™ disconnects OUT from IN via internal MOSFETs, eliminating reverse current across VOUT = 0V–5V and enabling zero-load battery drain during sleep. The single 1% RSEL resistor sets output voltage in 100mV steps from 1.8V to 5V without continuous feedback divider current loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Supply Current (OUT) | 300nA typical - enables >10-year battery life in always-on IoT sensors with 200mAh coin cells. |
| Shutdown Current | 0.5nA total (IN + LX) - eliminates parasitic drain in RTC backup and alarm buzzer hold-up circuits. |
| Input Voltage Range | 400mV to 5.5V - supports direct operation from partially discharged alkaline, silver oxide, or zinc-air cells. |
| Output Voltage Range | 1.8V to 5V, 100mV/step via single 1% RSEL resistor - reduces BOM count and PCB area vs. dual-resistor feedback. |
| Peak Inductor Current Limit | 500mA - matches 2.2µH inductors for optimal size/efficiency tradeoff in wearable OHRM LED drivers. |
| Minimum Startup Voltage | 0.88V (typ) - ensures reliable cold-start from single primary cells at low temperature or high ESR. |
| Package | 2mm × 2mm, 6-pin µDFN (L622+1C) - enables compact 3mm² solution size including input/output capacitors and inductor. |
Pinout & Package
MAX17223ENT+ uses the 2mm × 2mm, 6-pin µDFN package (package code L622+1C), optimized for high-density wearable PCB layouts with minimal thermal resistance (θJA = 223.6°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output node | Connects to 10µF X5R ceramic capacitor; supplies power to downstream sensors/radios with ±1.5% accuracy in LPM mode. |
| 2 (LX) | Switching node | Drives external 2.2µH 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 copper resistance (<1mΩ) to ensure stable ULPM operation. |
| 4 (SEL) | Output voltage selection | Accepts single 1% resistor to GND; detection time ≤600µs avoids startup delay in fast-wake applications. |
| 5 (IN) | Input supply | Accepts 400mV–5.5V; requires 10µF X5R capacitor close to pin to suppress battery impedance spikes during LED pulses. |
| 6 (EN) | Active-high enable | Pull high to VIN or microcontroller GPIO; enables ETP protection only on MAX17220/2/4 variants (not applicable to MAX17223). |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.5nA total shutdown current with full output-input isolation and no reverse current up to 5V VOUT. |
| Resistor-Selectable Output | Single 1% RSEL resistor sets 1.8V–5V output in 100mV steps-eliminates feedback divider current loss in nanoPower systems. |
| Ultra-Low-Power Mode (ULPM) | 11.5Hz minimum switching frequency at 1.49mA transition point-extends battery life in standby sensor nodes. |
| Sub-1V Startup Capability | 0.88V typical startup voltage enables use with single alkaline/AAA cells down to 0.4V under load. |
| High Efficiency Across Load Range | 95% peak efficiency maintained from 10µA to 200mA output-reduces thermal stress in sealed wearable enclosures. |
Applications
| Optical Heart-Rate Monitoring (OHRM) LED Drivers | Supercapacitor Backup for RTC/Alarm Buzzers |
|---|---|
Use Scenario: Driving pulsed green/red LEDs in wrist-worn wearables powered by AAA alkaline cells. IC Role / Device Role / Timing Role: Boosts 0.8V–1.6V cell voltage to stable 3.3V for LED bias, synchronized to MCU wake cycles. Use Value: 300nA quiescent current extends battery life beyond 2 years; True Shutdown prevents supercap discharge during MCU sleep. |
Use Scenario: Maintaining 3.3V RTC supply and 5V buzzer drive during main power failure using 5.5V/0.22F supercap. IC Role / Device Role / Timing Role: Regulates supercap voltage down to 400mV while blocking reverse current into depleted source. Use Value: 0.5nA shutdown current preserves supercap charge for >10 years; 1.8V–5V output range supports both RTC and buzzer logic. |
| Primary-Cell Portable Systems | Tiny, Low-Power IoT Sensors |
Use Scenario: Powering Bluetooth LE temperature sensors (e.g., MAX30205) from silver-oxide button cells. IC Role / Device Role / Timing Role: Provides regulated 3V rail during brief radio transmit bursts, then reverts to ULPM between readings. Use Value: 400mV operational floor allows full cell utilization; 2mm × 2mm µDFN fits within 8mm² total PCB area including passives. |
Use Scenario: Enabling multi-year operation of soil moisture or air quality sensors powered by AA alkaline batteries. IC Role / Device Role / Timing Role: Supplies 2.5V to ultra-low-power MCU and analog front-end during 10-second measurement intervals. Use Value: Resistor-selectable output eliminates need for custom feedback networks; 95% efficiency minimizes self-heating in sealed housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ENT+ | Same 500mA ILIM, identical pinout and RSEL interface, but lacks Enable Transient Protection (ETP) circuitry. | Suitable for push-pull EN-driven systems where ETP is unnecessary; same 300nA IQ_OUT and 0.5nA ISD_TOTAL. | Select MAX17222ENT+ when EN is driven directly by MCU GPIO without pull-up resistors. |
| TPS61291DRVR | 350nA IQ, 400mV–5.5V input, but only 300mA ILIM and fixed 3.3V/5V outputs (no RSEL); 1.2mm × 1.6mm DSBGA package. | Better suited for space-constrained designs needing fixed output; lacks resistor-programmability and True Shutdown reverse-blocking. | Choose TPS61291DRVR when output voltage is fixed and PCB area is critical, but accept reduced flexibility and higher minimum load current. |
Compared with MAX17222ENT+, the MAX17223ENT+ offers identical core performance but targets open-drain EN configurations requiring ETP; versus TPS61291DRVR, it provides programmable output and superior reverse-current blocking at the cost of slightly larger footprint.
Availability
MAX17223ENT+ is available at Aetrix Electronics and suitable for optical heart-rate monitoring, supercapacitor backup, and primary-cell portable systems requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX17223ENT+ 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, automotive, and healthcare markets.
The MAX17220–MAX17225 family was designed specifically for ultra-low-power battery-operated devices-prioritizing nanoamp quiescent current, sub-1V startup, and minimal solution size in wearables, medical sensors, and energy-harvesting systems.
FAQ
What is the minimum input voltage required for MAX17223ENT+ to start up and regulate?
The MAX17223ENT+ has a typical minimum startup input voltage of 0.88V at +25°C with a 3kΩ load, and guarantees operation down to 400mV after startup depending on load current. This enables reliable cold-start from single alkaline, silver oxide, or zinc-air cells-even at end-of-life or low temperature-making it ideal for primary-cell wearables where every millivolt matters. The MAX17223ENT+ achieves this via an internal charge pump that bootstraps from the output rail during initial power-up.
How does the RSEL resistor selection work for MAX17223ENT+, and what tolerance is required?
The MAX17223ENT+ uses a single resistor from SEL to GND to set output voltage in 100mV increments from 1.8V to 5V, per the RSEL Selection Table. A ±1% standard resistor is required-e.g., 133kΩ for 3.0V-and the device samples RSEL for ≤600µs at startup. This eliminates continuous current draw through feedback dividers, preserving battery life in always-on sensors. The MAX17223ENT+ tolerates up to ±1% resistor error, ensuring ±100mV output accuracy across temperature and process variation.
Does MAX17223ENT+ support True Shutdown™, and what is its reverse-current behavior?
Yes, MAX17223ENT+ features True Shutdown™, which fully disconnects the output from the input using internal MOSFETs. In shutdown mode, total current into IN and LX is just 0.5nA, and no reverse current flows even when VOUT is held at 0V–5V-critical for supercapacitor backup and RTC hold-up circuits. This is verified across -40°C to +125°C and distinguishes MAX17223ENT+ from conventional boost converters with body-diode leakage paths.
What inductor value is recommended for MAX17223ENT+, and why is 2.2µH optimal?
Analog Devices specifies 2.2µH as the optimal inductor for MAX17223ENT+ across most applications, balancing physical size, efficiency (>90% at 100µA–100mA), and peak current handling (500mA ILIM). Smaller values increase ripple and EMI; larger values reduce output current capability in discontinuous conduction mode. The 2.2µH Coilcraft XFL4020-222 is validated in the datasheet, and inductor DCR must be <150mΩ to maintain efficiency. Using 2.2µH ensures stable ULPM operation and minimal PCB area in wearable form factors.
Can MAX17223ENT+ operate with input voltage higher than output voltage, and how is output regulated in that case?
Yes, MAX17223ENT+ operates safely when VIN exceeds VOUT by a diode drop (~0.2V–0.7V), clamping VOUT to VIN minus forward voltage of the internal rectifier. When VIN is within ~100mV of the target VOUT, the device transitions to buck-like regulation-maintaining tight output accuracy without oscillation. This behavior is inherent to its synchronous architecture and is documented in the "Operation with VIN > VOUT" section of the datasheet, ensuring robustness in battery-swapping or hot-plug scenarios where input voltage may transiently exceed the programmed output.
MAX17223ENT+ 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:
- 500mA (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)
MAX17223ENT+ FAQ
1.How can I place an order for MAX17223ENT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17223ENT+ 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 MAX17223ENT+ reliable?
The price and inventory of MAX17223ENT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17223ENT+ is usually 5 days.
3.What payment methods are accepted for MAX17223ENT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17223ENT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17223ENT+?
MAX17223ENT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17223ENT+ 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 MAX17223ENT+?
For technical support, including MAX17223ENT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17223ENT+ requirements.
6.How does Aetrix verify that MAX17223ENT+ is sourced from the original manufacturer or authorized distributors?
All MAX17223ENT+ 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 MAX17223ENT+ meets industry standards.
7.What is the process for return or replacement of MAX17223ENT+?
All MAX17223ENT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17223ENT+, 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 MAX17223ENT+ part is unused and in its original packaging.
Return procedure for MAX17223ENT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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