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Analog Devices Inc./Maxim Integrated MAX14720FEWA+T
- Part No.:
- MAX14720FEWA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 25-WFBGA, WLBGA
- Datasheet:
-
MAX14720FEWA+T.pdf
- Description:
- WEARABLE CHARGE MANAGEMENT SOLUT
- Quantity:
- Payment:
- Shipping:
Inventory:1,795
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Product details
Overview
MAX14720FEWA+T from Analog Devices is a highly integrated, micro-IQ power-management IC designed as the primary PMIC for ultra-low-power, battery-powered wearable and portable medical devices. It integrates a 250mW buck-boost regulator (2.5V–5V output), a 200mA synchronous buck regulator (1.0V–2.0V), a 100mA LDO (0.9V–4.0V), a 200mA load switch with battery impedance measurement, and a programmable power sequencer with push-button monitoring - all in a 25-bump WLP (2.26mm × 2.14mm).
For engineers reviewing the MAX14720FEWA+T datasheet, MAX14720FEWA+T pinout, MAX14720FEWA+T application, or MAX14720FEWA+T equivalent, this device delivers verified sub-1µA off-state current (120nA seal mode), configurable voltage sequencing, I²C-controlled regulation, and battery-impedance-aware power switching - critical for shelf-life extension and reliable on/off control in coin-cell or dual-alkaline systems.
Technical Context
The MAX14720FEWA+T implements a deterministic, register-configurable power-on sequence with four programmable turn-on timing points relative to boot and reset release, supporting applications requiring strict voltage ramp ordering (e.g., sensor + MCU + display). Its burst-mode switching regulators maintain high efficiency down to 1µA load, while the integrated battery impedance detector uses controlled SWIN/SWOUT voltage sampling under soft-start-limited current injection.
Unlike the companion MAX14750, the MAX14720FEWA+T embeds a dedicated button monitor (KIN/KOUT) and sequencer logic that enables true "shipping mode" (≤1µA system leakage) and delayed POR (72–88ms), making it suitable for non-rechargeable or separately charged battery systems where autonomous power state management is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck-Boost Output | 2.5V–5.0V (100mV step); supports biasing of low-power displays or RF modules from single-cell input. |
| Buck Regulator Output | 1.0V–2.0V (25mV step); supplies core logic or low-voltage MCUs with ±3% accuracy at 1mA load. |
| LDO Output | 0.9V–4.0V (100mV step); configurable as 100mA LDO or 1Ω load switch (at 1.8V) for peripheral isolation. |
| Seal Mode Current | 120nA typical; enables multi-year shelf life by disconnecting all loads and suppressing leakage paths. |
| Power Switch RON | 250mΩ max at 2.7V; limits voltage drop during 200mA battery discharge and enables accurate impedance sensing. |
| Operating Temp Range | −40°C to +85°C; qualified for clinical-grade wearable and portable medical environments. |
| I²C Interface | Standard-mode (0–400kHz); supports dynamic reconfiguration of regulators, sequencing, and fault recovery without hardware changes. |
Pinout & Package
MAX14720FEWA+T is packaged in a 25-bump, 0.4mm pitch wafer-level package (WLP), measuring 2.26mm × 2.14mm, optimized for space-constrained wearable PCBs. The bump layout follows JEDEC MO-220 standards with five rows (A–E) and five columns (1–5), featuring dedicated GND bumps (B2, B3, C2, C3, D2) and functional I/O arranged for minimal routing complexity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | BIN | Buck regulator input; must be connected to HVIN on board; requires 1µF bypass to GND. |
| A2 | BLX | Buck regulator switch node; connects to external inductor and output capacitor. |
| A3 | BOUT | Buck regulator output; supplies 1.0V–2.0V loads; requires 10µF ceramic output capacitor. |
| A4 | LIN | LDO input; accepts 1.71V–5.5V; bypass with 1µF capacitor to GND. |
| A5 | LOUT | LDO output; programmable 0.9V–4.0V; supports load-switch mode with 1Ω RON. |
| B1 | MON | Multiplexer output; monitors SWIN, BIN, HVIN, HVOUT, LIN, LOUT, BOUT via internal analog switches. |
| C1 | SDA | Open-drain I²C data line; supports bidirectional communication and bus arbitration. |
| D1 | SCL | I²C clock input; operates up to 400kHz; requires external pull-up resistor. |
| D3 | KIN | Active-low key input; internal 210kΩ pull-up; triggers button wake-up and shipping-mode entry. |
| D4 | RST | Active-low open-drain reset output; asserts during POR, fault shutdown, or hard reset events. |
| E1 | HVOUT | Buck-boost output; supplies 2.5V–5.0V loads; requires 10µF output capacitor. |
| E4 | HVIN | Buck-boost input; must be tied to BIN on PCB; bypass with 1µF capacitor to GND. |
| C5 | SWOUT | Power switch output; connects to battery load; 100µF capacitor required for impedance measurement. |
| B5 | SWIN | Power switch input; ≤ VCC; isolated from battery during seal mode to minimize leakage. |
| C4 | MPC | Multipurpose control input; used for factory configuration or user-defined function (e.g., mode select). |
Key Features
| Feature | Design Value |
|---|---|
| Micro-IQ Buck-Boost Regulator | 1.1µA quiescent current enables continuous operation in always-on sensor nodes without depleting coin cells. |
| Programmable Battery Seal Mode | Reduces system leakage to ≤120nA, extending unopened product shelf life beyond 5 years. |
| Integrated Battery Impedance Detection | Measures battery ESR using controlled current pulses and SWOUT voltage sampling - no external ADC needed. |
| Configurable Power Sequencing | Four-stage timing (tBOOT, post-RST, two proportional points) ensures safe startup of mixed-voltage subsystems. |
| Push-Button Monitoring & Recovery | Hardware-accelerated KIN/KOUT interface enables ultra-low-power wake-up and automatic hard-reset recovery. |
| I²C-Controlled Soft-Start & Discharge | Register-selectable active/passive discharge prevents voltage overshoot during regulator disable or fault shutdown. |
Applications
| Wearable Medical Sensors | Portable Diagnostic Devices |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) worn on skin, powered by CR2032 coin cell with multi-year shelf life requirement. IC Role / Device Role / Timing Role: Primary PMIC managing buck-boost (for RF transceiver), buck (for MCU core), LDO (for analog front-end), and battery seal mode. Use Value: 120nA seal current preserves battery charge during storage; programmable sequencing prevents brownout during BLE connection startup. |
Use Scenario: Handheld ECG recorder with removable alkaline batteries and LCD display requiring stable 3.3V and 5V rails. IC Role / Device Role / Timing Role: Central power controller enabling coordinated ramp-up of analog signal chain, MCU, and display backlight. Use Value: Integrated MON multiplexer eliminates external voltage dividers; HVOUT rail powers display bias while maintaining <3% output accuracy. |
| Fitness Tracker with Button UI | Disposable Point-of-Care Test Kit |
Use Scenario: Activity band with physical power button, OLED display, and motion sensor - shipped sealed until first use. IC Role / Device Role / Timing Role: Push-button sequencer initiating shipping-mode exit, POR delay, and staged regulator enable (LDO → buck → buck-boost). Use Value: KIN-triggered transition reduces initial leakage to <1µA; RST assertion synchronizes firmware initialization with rail stability. |
Use Scenario: Single-use lateral flow analyzer with embedded MCU, LED indicators, and electrochemical sensor requiring precise 1.8V and 3.3V supplies. IC Role / Device Role / Timing Role: Low-quiescent PMIC delivering regulated outputs and performing end-of-life battery impedance check before test initiation. Use Value: On-chip battery impedance measurement replaces external coulomb counter; SWOUT-based sensing avoids added BOM cost and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14750FEWA+T | Dedicated enable pins (SWEN, BEN, LEN, HVEN); no built-in sequencer or button monitor; higher total quiescent current in off state (1.2µA vs. 0.12µA). | Designed as companion PMIC to chargers in rechargeable systems; lacks seal mode and battery impedance detection. | Select when full I/O control and flexibility in sequencing logic are required, and battery monitoring is handled externally. |
| TPS65218D0RSLR | Higher integration (integrated charger, RTC, GPIOs); larger 48-pin QFN package; minimum input voltage 2.7V (vs. 1.8V for MAX14720). | Targeted at TI-processor-based embedded systems; not optimized for coin-cell or ultra-low-leakage shelf-life requirements. | Choose for applications needing integrated charging and processor-specific power sequencing, not for ultra-small form factor or sub-µA standby. |
Compared with MAX14750FEWA+T and TPS65218D0RSLR, the MAX14720FEWA+T uniquely combines sub-120nA seal current, battery impedance measurement, and autonomous button-initiated sequencing - making it irreplaceable for disposable, coin-cell-powered medical wearables demanding zero-maintenance shelf life and field-deployable reliability.
Availability
MAX14720FEWA+T is available at Aetrix Electronics and suitable for wearable medical sensors, portable diagnostic devices, fitness trackers with button UI, and disposable point-of-care test kits requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX14720FEWA+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX14720FEWA+T belongs to Analog Devices' micro-IQ power management portfolio, engineered specifically for ultra-low-power, battery-constrained medical and wearable applications where minimizing quiescent current and maximizing shelf life are design-critical objectives.
FAQ
What is the maximum output current capability of the buck-boost regulator in MAX14720FEWA+T?
The MAX14720FEWA+T buck-boost regulator delivers up to 250mW of output power - for example, 50mA at 5V or 100mA at 2.5V. Its current limit is programmable, and short-circuit peak current is rated at 0.4A–1.9A depending on operating conditions. This makes MAX14720FEWA+T suitable for powering low-power displays, BLE radios, or sensor bias rails without external current-sense circuitry.
Does MAX14720FEWA+T support battery impedance measurement, and how is it implemented?
Yes, MAX14720FEWA+T supports battery impedance measurement exclusively in the MAX14720 variant (not MAX14750). It uses the SWIN/SWOUT terminals to apply a known current pulse (250µA–8mA, programmable) and measure resulting voltage delta across the battery. The internal SAR ADC and MON multiplexer perform the measurement without external components - a feature confirmed in the device's Electrical Characteristics table (pages 8–9) and Detailed Description section.
What is the purpose of the MPC pin on MAX14720FEWA+T, and how is it configured?
The MPC (Multipurpose Control) pin on MAX14720FEWA+T serves as a factory-programmable configuration input. During power-up, its logic level determines default settings for UVLO selection, sequencer behavior, and seal mode activation. Unlike general-purpose GPIOs, MPC is sampled only at boot and does not support runtime reconfiguration - ensuring deterministic startup behavior critical for medical device certification. Its function is defined in the MAX14720FEWA+T datasheet Section "Detailed Description" and Register Map.
Can MAX14720FEWA+T operate from a 1.8V input supply, and which blocks remain functional?
Yes, MAX14720FEWA+T supports 1.8V input across multiple rails: the buck-boost (HVIN), buck (BIN), LDO (LIN), and power switch (SWIN) all operate down to 1.8V. At 1.8V, the LDO delivers up to 50mA (vs. 100mA at >1.8V), and the buck-boost maintains 250mW output capability. All quiescent current specs (e.g., 1.1µA IQ_BOOST) are validated at 1.8V per the Electrical Characteristics table on page 4 of the datasheet.
How does the MAX14720FEWA+T sequencer handle faults during power-on, and what is the retry behavior?
When a fault (e.g., UVLO or thermal shutdown) occurs during sequenced power-on, MAX14720FEWA+T transitions to shutdown state and waits for fault clearance. If BatZUVLO is enabled and SWSeq = 001 (always-on), the load switch remains active to allow recovery. For repeated failures, a retry counter increments; after seven consecutive failures, retries abort and MAX14720FEWA+T enters OFF mode - a behavior documented in the "Detailed Description" section (page 14) and confirmed in the sequencer flow diagram.
MAX14720FEWA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 25-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (1), Step-Down/Step-Up (Buck/Boost) (1), Linear (LDO) (1)
- Number of Outputs:
- 3
- Frequency - Switching:
- 2MHz
- Voltage/Current - Output 1:
- 2.5V ~ 5V
- Voltage/Current - Output 2:
- 1V ~ 2V, 200mA
- Voltage/Current - Output 3:
- 0.9V ~ 4V, 100mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-WLP (2.11x2.23)
MAX14720FEWA+T FAQ
1.How can I place an order for MAX14720FEWA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14720FEWA+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 MAX14720FEWA+T reliable?
The price and inventory of MAX14720FEWA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14720FEWA+T is usually 5 days.
3.What payment methods are accepted for MAX14720FEWA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14720FEWA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14720FEWA+T?
MAX14720FEWA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14720FEWA+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 MAX14720FEWA+T?
For technical support, including MAX14720FEWA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14720FEWA+T requirements.
6.How does Aetrix verify that MAX14720FEWA+T is sourced from the original manufacturer or authorized distributors?
All MAX14720FEWA+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 MAX14720FEWA+T meets industry standards.
7.What is the process for return or replacement of MAX14720FEWA+T?
All MAX14720FEWA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14720FEWA+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 MAX14720FEWA+T part is unused and in its original packaging.
Return procedure for MAX14720FEWA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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