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Analog Devices Inc./Maxim Integrated MAX14720AEWA+
- Part No.:
- MAX14720AEWA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 25-WFBGA, WLBGA
- Datasheet:
-
MAX14720AEWA+.pdf
- Description:
- IC REG TRIPLE BUCK/BST/LNR 25WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,717
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Product details
Overview
MAX14720AEWA+ 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 MAX14720AEWA+ datasheet, MAX14720AEWA+ pinout, MAX14720AEWA+ application, or MAX14720AEWA+ equivalent, this device delivers verified sub-1µA off-state current (120nA seal mode), I²C-configurable sequencing, burst-mode efficiency down to 1.1µA quiescent current, and battery-impedance-aware power control for shelf-life extension in coin-cell and dual-alkaline systems.
Technical Context
The MAX14720AEWA+ implements a hierarchical power architecture: its buck-boost regulator supports continuous biasing of low-power displays or sensors across wide input ranges (1.8V–5.5V), while its buck and LDO provide tightly regulated, independently controllable rails. The integrated sequencer enables true-off shipping mode via push-button-triggered shutdown with <1µA system leakage.
Its battery impedance measurement circuitry operates by opening the 250mΩ load switch, applying a programmable 250µA–8mA test current via VCC, and measuring voltage deltas - requiring no external components beyond the mandatory 100µF SWOUT capacitor. All regulators support active/passive discharge and UVLO configuration per rail (BIN/LIN) via I²C register UVLOCfg.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck-Boost Output | 2.5V–5.0V (100mV step); supports display bias, sensor bias, or MCU core supply across declining battery voltage |
| Buck Regulator Output | 1.0V–2.0V (25mV step); powers low-voltage digital logic or RF subsystems with ±3% accuracy |
| LDO Output | 0.9V–4.0V (100mV step); configurable as linear regulator or 1Ω/3Ω load switch for peripheral isolation |
| Seal Mode Current | 120nA typical; enables multi-year shelf life in sealed medical wearables before first use |
| Load Switch RON | 250mΩ max at 2.7V; minimizes dropout and self-heating during battery impedance measurement |
| Operating Temp Range | −40°C to +85°C; qualified for clinical-grade wearable environments with full parametric guarantee |
| I²C Interface | Standard-mode (400kHz); enables dynamic rail reconfiguration, sequencing adjustment, and fault logging without hardware change |
Pinout & Package
MAX14720AEWA+ is housed 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 WLP standards with five rows (A–E) and five columns (1–5), featuring multiple GND bumps for low-impedance return paths and dedicated MON pin for multiplexed voltage monitoring.
| 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 rail; requires 10µF ceramic bypass |
| A4 | LIN | LDO input; accepts 1.71V–5.5V; bypass with 1µF capacitor to GND |
| A5 | LOUT | LDO output; delivers 0.9V–4.0V; bypass with 1µF capacitor to GND |
| B1 | MON | Monitor multiplexer output; reads voltages from SWIN, BIN, HVIN, HVOUT, LIN, LOUT, BOUT |
| C1 | SDA | Open-drain I²C data line; supports standard-mode (400kHz) communication with pullup required |
| C4 | MPC | Multipurpose control input; used for custom sequencing triggers or factory programming |
| D1 | SCL | I²C clock input; requires external pullup; timing compliant with SMBus 2.0 |
| D3 | KIN | Active-low button monitor input; includes internal 210kΩ pullup; debounced in hardware |
| D4 | RST | Active-low open-drain reset output; asserts during POR, sequencing faults, or thermal shutdown |
| D5 | CAP | Internal decoupling node; requires 0.1µF capacitor to GND for stable internal reference |
| E1 | HVOUT | Buck-boost output; supplies 2.5V–5.0V; requires 10µF ceramic bypass |
| E2 | HVOLX | Buck-boost boost switch; connects to external inductor and flying capacitor |
| E3 | HVILX | Buck-boost buck switch; connects to external inductor and input capacitor |
| E4 | HVIN | Buck-boost input; must be connected to BIN on board; bypass with 1µF capacitor |
| C5 | SWOUT | Power switch output; feeds system loads; requires 100µF capacitor for battery impedance measurement |
| B4 | VCC | Main power supply input (1.8V–5.5V); powers internal logic and I²C interface |
| B5 | SWIN | Power switch input; must be ≤ VCC; connects to battery or main supply rail |
| C5 | SWOUT | Power switch output; feeds system loads; requires 100µF capacitor for battery impedance measurement |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Seal Mode | Reduces total system leakage to 120nA - enabling >10-year shelf life for single-use medical wearables |
| Integrated Battery Impedance Measurement | Eliminates need for external current sources or ADCs; measures battery ESR using only SWOUT capacitor and MON pin |
| Configurable Power Sequencing | Four-stage turn-on timing (tBOOT, RST release, two proportional points) with 80ms/120ms/220ms/420ms POR delay options |
| Burst-Mode Micro-IQ Regulation | Delivers 1.1µA (buck-boost) and 0.9µA (buck/LDO) quiescent current - sustaining weeks of operation on coin cells |
| Hardware Button Monitor with Recovery | Supports ultra-low-power wake-up and hard reset recovery without host MCU intervention or firmware overhead |
| Per-Rail UVLO Configuration | UVLOCfg register allows shared or independent BIN/LIN UVLO - reducing leakage in single-supply designs |
Applications
| Wearable Medical Monitoring | Portable Diagnostic Device |
|---|---|
Use Scenario: Continuous ECG/PPG sensing in disposable patch monitors powered by CR2032 coin cell. IC Role / Device Role: Primary PMIC managing sensor bias (HVOUT), MCU core (BOUT), analog front-end (LOUT), and battery health monitoring (SWOUT impedance). Use Value: 120nA seal mode extends unopened shelf life to 12 years; burst-mode regulation enables >30 days of continuous sensing on one battery. |
Use Scenario: Handheld blood glucose meter with LCD display, Bluetooth LE, and electrochemical sensor. IC Role / Device Role: Central power controller delivering regulated 3.3V (HVOUT), 1.8V (BOUT), and 2.8V (LOUT) while enabling button-initiated deep-sleep entry. Use Value: Integrated sequencer ensures correct power-up order (LCD bias → MCU → sensor); battery impedance check warns user of end-of-life before critical measurement failure. |
| Smart Inhaler Adherence Tracker | Wireless Pulse Oximeter |
Use Scenario: Low-profile inhaler add-on that logs actuation count, time, and environmental conditions using MEMS sensors and BLE. IC Role / Device Role: Ultra-miniaturized PMIC supplying 2.5V (HVOUT) for BLE radio, 1.2V (BOUT) for MCU, and 3.0V (LOUT) for sensor interface - all from AAA alkaline. Use Value: 25-bump WLP fits within 8mm × 8mm footprint; programmable soft-start prevents voltage sag during BLE transmission bursts. |
Use Scenario: Rechargeable fingertip pulse oximeter with OLED display and photodiode array operating on Li-ion or coin cell. IC Role / Device Role: Dual-role PMIC: provides constant 3.3V (HVOUT) for OLED, 1.1V (BOUT) for MCU, and 2.5V (LOUT) for analog signal chain - plus battery impedance tracking for runtime estimation. Use Value: Active discharge on HVOUT/BOUT/LOUT ensures fast OLED turn-off and eliminates ghosting; MON multiplexer reduces BOM by replacing discrete voltage monitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14750AEWA+ | Companion PMIC with individual enable pins (SWEN, BEN, LEN, HVEN); no built-in sequencer or button monitor; higher boot time (24ms vs. 11ms) | Designed for rechargeable systems where sequencing is handled externally; lacks seal mode and battery impedance measurement | Select when full I/O control is needed and host MCU manages sequencing; not suitable for true-off or shelf-life-critical applications |
| TPS65218D0RSLR | Quad-buck + LDO PMIC with integrated charger; 2.5µA quiescent current (vs. 120nA); larger 48-pin QFN package (5mm × 5mm) | Targets rechargeable industrial IoT; includes battery charging but no battery impedance measurement or seal mode | Choose for Li-ion-based portable devices needing integrated charging; avoid where coin-cell shelf life or ultra-small size are mandatory |
Compared with MAX14750AEWA+, the MAX14720AEWA+ offers unique sequencer-driven true-off capability and battery impedance diagnostics - making it irreplaceable for disposable medical wearables. Compared with TPS65218D0RSLR, its 120nA seal mode and 2.26mm × 2.14mm WLP deliver unmatched shelf-life density for single-use applications.
Availability
MAX14720AEWA+ is available at Aetrix Electronics and suitable for wearable medical devices, portable diagnostic instruments, and smart inhaler adherence trackers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant wafer-level packaging.
Supply support for MAX14720AEWA+ 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 MAX14720AEWA+ belongs to Analog Devices' micro-IQ power-management portfolio, engineered specifically for ultra-low-power, battery-constrained medical and fitness wearables - emphasizing minimal quiescent current, integrated battery health monitoring, and true-off shipping mode.
FAQ
What is the guaranteed maximum quiescent current of the MAX14720AEWA+ in seal mode?
The MAX14720AEWA+ guarantees a maximum seal mode input current of 1µA, with a typical value of 120nA at +25°C. This ultra-low leakage is achieved by disabling all regulators, disconnecting system loads via the integrated power switch, and placing the sequencer and I²C interface into deep-hold state - enabling multi-year shelf life for sealed medical wearables before first use. The MAX14720AEWA+ datasheet specifies this under Electrical Characteristics, Table "Supply Current".
Does the MAX14720AEWA+ support battery impedance measurement, and what external components are required?
Yes, the MAX14720AEWA+ supports battery impedance measurement exclusively in MAX14720 variants with BatZUVLO enabled. It requires only a single external 100µF capacitor on the SWOUT pin and proper routing of SWIN to VCC (with no capacitor on the battery side). No external current source, precision resistors, or additional ADC channels are needed - the measurement uses the internal programmable current source (250µA–8mA) and MON multiplexer. This feature is documented in the "Battery Impedance Measurement" section of the MAX14720AEWA+ datasheet.
How does the MAX14720AEWA+ handle power sequencing during startup, and can it be customized?
The MAX14720AEWA+ implements a four-stage, I²C-configurable power sequencing engine. Each regulator (buck-boost, buck, LDO, switch) can be assigned to turn on at tBOOT, after RST release, or at two fixed proportional points within the POR window. The overall POR delay is selectable via register (80ms/120ms/220ms/420ms). Sequencing is fully programmable and persists across resets - allowing precise control over voltage ramp timing to prevent latch-up or inrush in sensitive analog circuits. This behavior is defined in the "Power Sequencing" section of the MAX14720AEWA+ datasheet.
What is the function of the MPC pin on the MAX14720AEWA+, and how is it typically used?
The MPC (Multipurpose Control) pin on the MAX14720AEWA+ serves as a flexible hardware trigger input that can be configured via I²C to initiate custom sequencing events, force hard reset, or enter factory programming mode. In default configuration, it acts as an additional wake-up input alongside KIN, supporting dual-button interfaces or mechanical switch redundancy. Its behavior is defined in the "MPC Pin Function" subsection of the MAX14720AEWA+ Detailed Description, and it requires no external pullup/pulldown in most configurations.
Can the MAX14720AEWA+ operate with a 1.2V input supply, and which blocks remain functional?
The MAX14720AEWA+ supports 1.2V input only on the LDO's switch-mode path (per Electrical Characteristics, "Input Voltage Range – Switch mode"), enabling the LDO to function as a 1Ω/3Ω load switch down to 1.2V. However, the buck-boost (min 1.8V), buck (min 1.8V), and power switch (min 1.8V) require ≥1.8V. At 1.2V, only the LDO-as-switch and I²C interface (if VCC ≥1.8V supplied separately) remain operational - making 1.2V a valid input only in specific low-voltage peripheral isolation scenarios, not full-system operation.
MAX14720AEWA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 25-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Topology:
- Step-Down (Buck) (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, PROG
- Voltage/Current - Output 2:
- 1V ~ 2V, 250mA
- Voltage/Current - Output 3:
- 0.9V ~ 4V, 100mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- 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)
MAX14720AEWA+ FAQ
1.How can I place an order for MAX14720AEWA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14720AEWA+ 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 MAX14720AEWA+ reliable?
The price and inventory of MAX14720AEWA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14720AEWA+ is usually 5 days.
3.What payment methods are accepted for MAX14720AEWA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14720AEWA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14720AEWA+?
MAX14720AEWA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14720AEWA+ 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 MAX14720AEWA+?
For technical support, including MAX14720AEWA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14720AEWA+ requirements.
6.How does Aetrix verify that MAX14720AEWA+ is sourced from the original manufacturer or authorized distributors?
All MAX14720AEWA+ 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 MAX14720AEWA+ meets industry standards.
7.What is the process for return or replacement of MAX14720AEWA+?
All MAX14720AEWA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14720AEWA+, 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 MAX14720AEWA+ part is unused and in its original packaging.
Return procedure for MAX14720AEWA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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