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Analog Devices Inc./Maxim Integrated MAX14720CEWA+T
- Part No.:
- MAX14720CEWA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 25-WFBGA, WLBGA
- Datasheet:
-
MAX14720CEWA+T.pdf
- Description:
- IC REG TRIPLE BUCK/BST/LNR 25WLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,466
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Product details
Overview
MAX14720CEWA+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 MAX14720CEWA+T datasheet, MAX14720CEWA+T pinout, MAX14720CEWA+T application, or MAX14720CEWA+T equivalent, this device delivers verified sub-1µA off-state current (120nA seal mode), I²C-configurable sequencing, battery-impedance-aware power control, and validated operation across –40°C to +85°C - critical for FDA-cleared wearables requiring long shelf life and reliable cold-chain startup.
Technical Context
The MAX14720CEWA+T implements a deterministic, register-controlled power-up sequence with four configurable voltage ramp points, POR delay (72–88ms), and delayed reset assertion. Its sequencer supports true-off shipping mode via button-triggered seal activation, disconnecting all loads and reducing system leakage to <1µA.
Battery impedance measurement is performed by opening the integrated 250mΩ (max) load switch, applying a programmable 250–8000µA test current to VCC, and measuring differential voltage drop - requiring no external ADC or calibration. All regulators feature burst-mode operation, active/passive output discharge, and UVLO with selectable BIN/LIN monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck-Boost Output | 2.5V–5.0V (100mV step); enables single-cell Li-ion or coin-cell biasing of displays/sensors without external level-shifting. |
| Buck Regulator IQ | 0.9µA typical; sustains >1-year runtime on 220mAh coin cell in always-on sensor-monitoring mode. |
| LDO Accuracy | ±3.1% over load/temperature; ensures stable reference for precision analog front-ends in medical ECG/PPG circuits. |
| Load Switch RON | ≤250mΩ at 2.7V; limits voltage drop to <50mV at 200mA, preserving battery headroom for RF transceivers. |
| Seal Mode Current | 120nA max; extends product shelf life beyond 5 years without battery replacement or recharging. |
| I²C Interface | Standard-mode (400kHz); allows full configuration of sequencing, UVLO thresholds, and discharge behavior post-POR. |
| Operating Temp | –40°C to +85°C; qualified for body-worn applications exposed to ambient temperature extremes and skin-contact thermal cycling. |
Pinout & Package
Package: 25-bump wafer-level package (WLP), 0.4mm pitch, 2.26mm × 2.14mm footprint, RoHS-compliant (W252M2+1 outline).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | BIN | Buck regulator input; must be connected to HVIN on PCB - shared input rail for buck and buck-boost stages. |
| A2 | BLX | Buck switch node; connects to external 2.2µH inductor - requires low-inductance layout to minimize EMI. |
| A3 | BOUT | Buck output; bypassed with 10µF ceramic capacitor - supplies core logic or MCU I/O rails at 1.0–2.0V. |
| A4 | LIN | LDO input; accepts 1.71–5.5V; supports direct connection to battery or regulated intermediate rail. |
| A5 | LOUT | LDO output; programmable 0.9–4.0V; used for analog sensors or low-noise RF bias requiring <150µVRMS noise. |
| B1 | MON | Multiplexer output; routes selected voltage (SWIN, SWOUT, HVIN, HVOUT, LIN, LOUT, BOUT) to external ADC. |
| C1 | SDA | I²C data line; open-drain, 1.4V min VIH (non-seal mode); enables register read/write for dynamic power policy updates. |
| C4 | MPC | Multipurpose control input; configurable as GPIO or wake-up interrupt source - supports custom button timing recovery. |
| D1 | SCL | I²C clock input; 400kHz max; synchronizes configuration writes and status reads during boot or runtime. |
| D3 | KIN | Active-low key input; internal 210kΩ pullup; detects mechanical button press to initiate seal mode or hard reset. |
| D4 | RST | Open-drain reset output; asserts low during POR (72–88ms) and fault conditions - drives external MCU reset pin. |
| E1 | HVOUT | Buck-boost output; 2.5–5.0V; powers OLED displays, op-amps, or high-side switches requiring rail-independent bias. |
| E4 | HVIN | Buck-boost input; tied to BIN on PCB; shares UVLO threshold (1.68–1.77V rising) with buck stage for coordinated brownout response. |
Key Features
| Feature | Design Value |
|---|---|
| Battery Seal Mode | Reduces total system current to 120nA by disabling all regulators, switching off load paths, and retaining only KIN monitoring - enabling multi-year shelf life. |
| Programmable Sequencing | Four-point voltage ramp control (tBOOT, RST release, two proportional POR intervals) with 80/120/220/420ms configurable reset delay - eliminates external timing components. |
| Battery Impedance Detection | On-chip 250–8000µA programmable current source + SAR ADC interface via MON pin - enables predictive battery health estimation without external circuitry. |
| Micro-IQ Buck-Boost | 1.1µA quiescent current with burst mode; maintains >85% efficiency at 10µA load - ideal for intermittent sensor wake-ups in wearable patches. |
| Integrated Load Switch | 250mΩ max RON at 2.7V with soft-start (0.65–13.8ms configurable) and short-circuit protection (200–700mA limit) - replaces discrete FET + driver + sense resistor. |
Applications
| Wearable ECG Patch | Smart Hearing Aid |
|---|---|
Use Scenario: Continuous 24/7 biopotential acquisition with motion artifact rejection and Bluetooth LE streaming. IC Role / Device Role / Timing Role: Primary PMIC managing three independent rails: 3.3V for BLE SoC, 1.8V for analog front-end, and 2.8V for op-amp bias - sequenced with 120ms POR delay and synchronized RST release. Use Value: 0.9µA buck IQ and 120nA seal mode extend 220mAh coin-cell life to >18 months; MON pin enables real-time battery impedance trending for end-of-life alerts. |
Use Scenario: Miniaturized in-ear hearing aid with adaptive gain control, noise suppression, and rechargeable Zn-air battery. IC Role / Device Role / Timing Role: Power controller handling battery removal detection, charging state handoff, and ultra-low-power sleep mode entry via KIN-triggered seal activation. Use Value: Integrated battery impedance measurement validates Zn-air cell health before audio processing; 250mΩ load switch minimizes voltage sag during peak 150mA amplifier bursts. |
| Portable Pulse Oximeter | Wireless Glucose Monitor |
Use Scenario: Handheld SpO₂ monitor with dual-wavelength LED drive, photodiode signal chain, and LCD display. IC Role / Device Role / Timing Role: Single-chip power hub delivering 5.0V to OLED display (HVOUT), 3.3V to MCU (BOUT), and 2.5V to analog sensor bias (LOUT) - with UVLO sharing between BIN and LIN to reduce leakage. Use Value: Burst-mode buck-boost maintains >90% efficiency at 50µA display backlight current; active discharge clears HVOUT within 10ms for fast shutdown between measurements. |
Use Scenario: Disposable subcutaneous glucose sensor patch transmitting readings every 5 minutes via NFC or BLE. IC Role / Device Role / Timing Role: Ultra-low-quiescent PMIC enabling 3-year shelf life: enters seal mode after factory programming, wakes only on scheduled transmission or button press (KIN). Use Value: 120nA seal current meets ISO 11607 packaging shelf-life requirements; I²C registers allow field firmware updates to adjust sequencing for new sensor variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14750CEWA+T | Companion PMIC with individual enable pins (SWEN, BEN, LEN, HVEN); no integrated sequencer or button monitor; higher total IQ in active state (4.4–8.3µA vs. MAX14720's 1.2–2.8µA off-state). | Targeted for rechargeable systems where charger IC handles sequencing; lacks battery seal mode and impedance measurement. | Select when design uses external charger/sequencer and requires maximum pin-level control over each regulator. |
| TPS650361RGER | TI PMIC with 3 buck converters (not buck-boost), no integrated battery impedance measurement, 1.5µA typical off-current (vs. MAX14720's 120nA), and no seal mode. | Designed for rechargeable Li-ion tablets; lacks ultra-low-power shipping mode and medical-grade accuracy specs (e.g., ±3.1% LDO). | Choose only if buck-only topology suffices and shelf-life >2 years is not required; verify UVLO thresholds and thermal shutdown behavior differ. |
Compared with MAX14750CEWA+T and TPS650361RGER, the MAX14720CEWA+T uniquely combines sub-1µA off-state, programmable sequencing, and on-die battery impedance sensing - making it the sole option for disposable or long-shelf-life medical wearables needing autonomous power policy execution.
Availability
MAX14720CEWA+T is available at Aetrix Electronics and suitable for wearable medical devices, portable diagnostic tools, and battery-sealed IoT edge sensors requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for MAX14720CEWA+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 MAX14720CEWA+T belongs to Analog Devices' micro-IQ power-management portfolio, engineered specifically for space-constrained, battery-operated medical and fitness wearables demanding multi-year shelf life, deterministic sequencing, and integrated battery health monitoring.
FAQ
What is the guaranteed maximum quiescent current of MAX14720CEWA+T in seal mode?
The MAX14720CEWA+T guarantees ≤120nA total input current in seal mode (ISEAL), measured with all functions disabled and no external loads. This value is specified in the Absolute Maximum Ratings table and confirmed across –40°C to +85°C. The MAX14720CEWA+T achieves this by disabling internal regulators, disconnecting all load paths, and retaining only the KIN button monitor circuit - enabling >5-year shelf life in sealed packaging.
Does MAX14720CEWA+T support battery impedance measurement on rechargeable cells?
Yes, the MAX14720CEWA+T supports battery impedance measurement on both non-rechargeable (coin-cell, alkaline) and rechargeable (Li-ion, Zn-air) batteries, provided BatZUVLO is enabled and SWIN is connected directly to VCC without intervening capacitance. The MAX14720CEWA+T uses an internal 250–8000µA programmable current source and MON multiplexer to perform differential voltage measurements - no external ADC or calibration is required.
How does the power sequencing behavior of MAX14720CEWA+T differ from MAX14750CEWA+T?
The MAX14720CEWA+T features an integrated programmable sequencer with push-button monitoring, automatic voltage ramp scheduling, and fault-recovery retry logic. In contrast, the MAX14720CEWA+T relies on external enable signals (SWEN, BEN, LEN, HVEN) and lacks seal mode, button timing, or built-in sequencing - requiring external MCU or FPGA control. The MAX14720CEWA+T is intended as the primary PMIC; MAX14750CEWA+T serves as a companion in charger-coordinated systems.
Can MAX14720CEWA+T operate with a 1.2V input supply on the LIN pin?
Yes, the MAX14720CEWA+T supports LDO operation down to 1.2V on the LIN pin when configured in switch mode (RON_LDO = 3Ω max at 1.2V/5mA), but standard LDO regulation requires ≥1.71V. At 1.2V, the LDO functions as a low-RON load switch only - delivering unregulated pass-through voltage to LOUT. Full LDO regulation (0.9–4.0V output) requires LIN ≥1.71V per the Electrical Characteristics table on page 7.
What is the maximum supported output current for the buck-boost regulator in MAX14720CEWA+T?
The MAX14720CEWA+T buck-boost regulator delivers up to 250mW of continuous output power (e.g., 50mA at 5V or 100mA at 2.5V), limited by thermal dissipation in the 2.26mm × 2.14mm WLP package. Peak short-circuit current is 0.4–1.9A, but sustained operation above 100mA requires careful PCB thermal design per θJA = 52.43°C/W. The MAX14720CEWA+T datasheet specifies 250mW as the maximum operating power under typical conditions.
MAX14720CEWA+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) (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)
MAX14720CEWA+T FAQ
1.How can I place an order for MAX14720CEWA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14720CEWA+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 MAX14720CEWA+T reliable?
The price and inventory of MAX14720CEWA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14720CEWA+T is usually 5 days.
3.What payment methods are accepted for MAX14720CEWA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14720CEWA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14720CEWA+T?
MAX14720CEWA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14720CEWA+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 MAX14720CEWA+T?
For technical support, including MAX14720CEWA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14720CEWA+T requirements.
6.How does Aetrix verify that MAX14720CEWA+T is sourced from the original manufacturer or authorized distributors?
All MAX14720CEWA+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 MAX14720CEWA+T meets industry standards.
7.What is the process for return or replacement of MAX14720CEWA+T?
All MAX14720CEWA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14720CEWA+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 MAX14720CEWA+T part is unused and in its original packaging.
Return procedure for MAX14720CEWA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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