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Analog Devices Inc./Maxim Integrated MAX14720EEWA+T
- Part No.:
- MAX14720EEWA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 25-WFBGA, WLBGA
- Datasheet:
-
MAX14720EEWA+T.pdf
- Description:
- IC REG SGL BUCK/BST/LINEAR 25WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,931
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Product details
Overview
MAX14720EEWA+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 250mΩ on-resistance at 2.7V, and a programmable button-monitoring sequencer - all in a 25-bump WLP (2.26mm × 2.14mm).
For engineers reviewing the MAX14720EEWA+T datasheet, MAX14720EEWA+T pinout, MAX14720EEWA+T application, or MAX14720EEWA+T equivalent, this device delivers verified sub-1µA off-state current (120nA seal mode), I²C-configurable voltage sequencing, battery impedance measurement capability, and burst-mode efficiency optimization for coin-cell and dual-alkaline systems.
Technical Context
The MAX14720EEWA+T 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, low-noise rails for digital logic and analog circuitry. All regulators feature programmable current limits, active/passive discharge, and UVLO monitoring with configurable thresholds.
Its sequencer enables true off-state control via push-button wake-up, delayed reset (72–88ms), and customizable power-on timing - critical for shipping-mode preservation and recovery from brownout. Battery impedance measurement is implemented via controlled SWIN/SWOUT switching and SAR ADC-based VCC sensing, requiring no external components beyond decoupling capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck-Boost Output | 2.5V–5.0V (100mV step); powers display bias or RF modules directly from battery without intermediate regulation |
| Buck Regulator Output | 1.0V–2.0V (25mV step); supplies core logic or MCU I/O with <±3% accuracy and 95mV dropout at 100mA |
| LDO Output | 0.9V–4.0V (100mV step); delivers low-noise (<150µVRMS) analog supply with configurable switch-mode operation |
| Quiescent Current | 1.1µA (buck-boost), 0.9µA (buck), 0.9µA (LDO); enables multi-year operation on coin-cell batteries |
| Seal Mode Current | 120nA; isolates battery from all loads during storage to extend shelf life beyond 5 years |
| Load Switch RON | 250mΩ max at 2.7V; minimizes voltage drop and self-heating during high-current battery isolation |
| Operating Temp | −40°C to +85°C; qualified for clinical-grade wearable and portable medical environments |
Pinout & Package
MAX14720EEWA+T 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 is fully validated per Maxim/Analog Devices package drawing 21-0788 (W252M2+1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 BIN | Buck regulator input | Must be connected to HVIN on board; requires 1µF bypass to GND; monitored by shared BIN UVLO |
| A2 BLX | Buck switch node | Internal connection to synchronous FET; not user-accessible; requires proper layout for EMI control |
| A3 BOUT | Buck regulator output | Supplies 1.0V–2.0V rail; requires 10µF ceramic output capacitor for stability and transient response |
| A4 LIN | LDO input | Accepts 1.71V–5.5V; includes dedicated LIN UVLO; bypassed with 1µF capacitor |
| A5 LOUT | LDO output | Programmable 0.9V–4.0V rail; supports both LDO and switch-mode operation |
| B1 MON | Multiplexer output | Shared analog monitor node for HVIN, SWOUT, BIN, LOUT, BOUT, HVOUT, and VCC measurements |
| C1 SDA | I²C data line | Open-drain, supports 400kHz standard-mode I²C; used for register configuration and status readback |
| C4 MPC | Multipurpose control input | Configurable as general-purpose input or sequencer trigger; internal pullup/down options |
| D1 SCL | I²C clock line | Input-only, 400kHz max; synchronizes all register access and sequencer timing |
| D3 KIN | Active-low key input | Monitors mechanical button with 210kΩ internal pullup; initiates wake-up or hard reset sequences |
| D4 RST | Active-low open-drain reset | Drives system reset with programmable delay (72–88ms); pulled up externally |
| E1 HVOUT | Buck-boost output | Delivers 2.5V–5.0V; requires 10µF output capacitor; supports precharge and active discharge |
| E4 HVIN | Buck-boost input | Must be connected to BIN on board; shares UVLO threshold; 1.8V–5.5V operating range |
Key Features
| Feature | Design Value |
|---|---|
| Battery Seal Mode | Reduces total system leakage to 120nA, enabling >5-year shelf life without battery removal |
| Integrated Battery Impedance Measurement | Performs calibrated VCC delta-sensing without external ADC or sense resistors - only requires SWIN-SWOUT connection |
| Configurable Power Sequencing | Four-stage turn-on timing (tBOOT, post-RST, two proportional points) with 80/120/220/420ms POR options |
| Burst-Mode Efficiency Optimization | Maintains >80% efficiency down to 10µA load on buck-boost and buck regulators |
| Programmable Button Timing | Supports long-press shutdown, double-click wake, and hardware-triggered hard reset recovery |
| Monitor Multiplexer (MON) | Single-pin analog readback of 7 critical voltages (HVOUT, BOUT, LOUT, SWOUT, BIN, HVIN, VCC) via I²C-controlled switches |
Applications
| Wearable ECG Patch | Smart Hearing Aid |
|---|---|
Use Scenario: Continuous 24/7 biopotential sensing with Bluetooth LE telemetry and on-device artifact filtering. IC Role / Device Role: Primary PMIC managing three independent rails: 3.3V for BLE SoC (HVOUT), 1.2V for DSP core (BOUT), and 1.8V for analog front-end (LOUT), plus battery health monitoring. Use Value: 120nA seal mode extends disposable patch shelf life; MON multiplexer enables real-time battery impedance trending without added BOM cost. |
Use Scenario: Miniaturized rechargeable hearing aid with adaptive gain control, noise suppression, and wireless charging detection. IC Role / Device Role: Central power controller sequencing LDO (for microphone bias), buck (for DSP), and buck-boost (for speaker driver), with KIN-triggered low-power wake. Use Value: Sub-1µA off-state current preserves charge during pocket storage; programmable UVLO prevents brownout-induced firmware corruption during low-battery operation. |
| Portable Pulse Oximeter | Disposable Glucose Monitor |
Use Scenario: Handheld clinical device using red/IR LEDs, photodiode, and ARM Cortex-M0+ MCU with OLED display. IC Role / Device Role: Single-chip power solution delivering 5.0V (HVOUT) to OLED, 3.3V (LOUT) to MCU, and 1.8V (BOUT) to ADC - all from single CR2032 cell. Use Value: Buck-boost maintains stable 5V display bias across full battery discharge (3.0V → 2.0V); tBOOT = 11ms ensures rapid startup for emergency use. |
Use Scenario: Single-use, strip-insertion glucose meter with LCD, LED indicator, and electrochemical sensor interface. IC Role / Device Role: Ultra-low-quiescent PMIC providing 3.0V (HVOUT) for LCD, 1.8V (BOUT) for MCU, and 2.5V (LOUT) for precision reference - powered by non-rechargeable alkaline pair. Use Value: 1.1µA buck-boost IQ enables >2-year shelf life; battery impedance measurement validates cell health before first use, reducing false-negative readings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14750EEWA+T | Dedicated enable pins (SWEN, BEN, LEN, HVEN) instead of sequencer; no KIN/KOUT or seal mode; identical regulators and WLP package | Suitable for rechargeable systems where host MCU handles sequencing; lacks battery impedance measurement and shipping-mode support | Select when full I²C control is unnecessary and discrete enable logic simplifies firmware design |
| TPS65218D0RSLR | Higher current (1.2A buck), wider VIN (1.8V–5.5V), but 12µA typical IQ; QFN-48 package (5mm × 5mm); no battery seal or impedance features | Targets industrial handhelds with higher power budgets; lacks ultra-low-IQ optimization and medical-grade sequencing | Choose for cost-sensitive, non-medical applications needing higher output current and simpler qualification path |
Compared with MAX14750EEWA+T, the MAX14720EEWA+T adds sequencer-driven autonomy and battery health diagnostics at the cost of MCU-level control granularity; versus TPS65218D0RSLR, it trades raw current capacity for 10× lower quiescent current and medical-specific features in half the footprint.
Availability
MAX14720EEWA+T is available at Aetrix Electronics and suitable for wearable medical devices, portable diagnostic instruments, and disposable patient monitors requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant wafer-level packaging.
Supply support for MAX14720EEWA+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 MAX14720EEWA+T belongs to Analog Devices' ultra-low-power PMIC portfolio, engineered specifically for battery-constrained medical wearables and portable diagnostics where multi-year shelf life, sub-µA quiescent operation, and integrated battery health monitoring are mandatory.
FAQ
What is the maximum output current supported by the buck-boost regulator in MAX14720EEWA+T?
The MAX14720EEWA+T buck-boost regulator delivers up to 250mW of output power - for example, 50mA at 5.0V or 100mA at 2.5V. Its current capability is voltage-dependent and limited by thermal dissipation in the 2.26mm × 2.14mm WLP package. Peak short-circuit current is 1.9A, but sustained operation above 100mA requires careful thermal design and PCB copper area.
Does MAX14720EEWA+T support battery impedance measurement on all battery chemistries?
Yes - MAX14720EEWA+T battery impedance measurement works with non-rechargeable coin-cell (CR2032), alkaline (AA/AAA), and lithium primary cells. It relies on controlled SWIN/SWOUT switching and internal SAR ADC sampling, requiring no external sense resistors. The feature is enabled only when BatZUVLO is set and SWSeq = 001 (always-on mode), as documented in the MAX14720EEWA+T datasheet Section "Battery Impedance Measurement".
Can the LDO in MAX14720EEWA+T be configured as a load switch, and what is its RON?
Yes - the MAX14720EEWA+T LDO can be reconfigured as a load switch via register control. In switch mode, its on-resistance is 1Ω at VLIN = 1.8V and 50mA, and 3Ω at VLIN = 1.2V and 5mA. This mode bypasses regulation entirely, enabling efficient power gating of peripherals while retaining the same pinout and control interface as LDO operation.
What is the purpose of the MPC pin on MAX14720EEWA+T, and how is it used in sequencer mode?
The MPC (Multipurpose Control) pin on MAX14720EEWA+T serves as a configurable general-purpose input that can trigger sequencer events - such as forced reset, manual rail enable/disable, or custom state transitions - without I²C intervention. In sequencer mode, MPC can be assigned via the MPCfg register to initiate power-on, enter seal mode, or abort ongoing battery impedance measurement, enhancing system responsiveness and reducing MCU firmware overhead.
How does the MAX14720EEWA+T achieve 120nA seal mode current, and what blocks remain active?
The MAX14720EEWA+T achieves 120nA seal mode by disabling all regulators, the monitor multiplexer, and the I²C interface, while retaining only the KIN button monitor circuit and its 210kΩ internal pullup. No other functions - including RST, MON, HVOUT, BOUT, or LOUT - draw current. This state is entered automatically after shutdown sequence completion and is exited only by KIN edge detection or external VCC restoration.
MAX14720EEWA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 25-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-WLP (2.11x2.23)
MAX14720EEWA+T FAQ
1.How can I place an order for MAX14720EEWA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14720EEWA+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 MAX14720EEWA+T reliable?
The price and inventory of MAX14720EEWA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14720EEWA+T is usually 5 days.
3.What payment methods are accepted for MAX14720EEWA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14720EEWA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14720EEWA+T?
MAX14720EEWA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14720EEWA+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 MAX14720EEWA+T?
For technical support, including MAX14720EEWA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14720EEWA+T requirements.
6.How does Aetrix verify that MAX14720EEWA+T is sourced from the original manufacturer or authorized distributors?
All MAX14720EEWA+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 MAX14720EEWA+T meets industry standards.
7.What is the process for return or replacement of MAX14720EEWA+T?
All MAX14720EEWA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14720EEWA+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 MAX14720EEWA+T part is unused and in its original packaging.
Return procedure for MAX14720EEWA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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