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Analog Devices Inc./Maxim Integrated MAX77960BEFV12+
- Part No.:
- MAX77960BEFV12+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 30-PowerUFQFN
- Datasheet:
-
MAX77960BEFV12+.pdf
- Description:
- IC USB-C BUCK/BOOST CHARGER
- Quantity:
- Payment:
- Shipping:
Inventory:441
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Product details
Overview
The MAX77960BEFV12+ from Maxim Integrated is a wide-input (3.5V–25.4V), 3A buck-boost battery charger IC with integrated FETs, Smart Power Selector™, and reverse buck (USB OTG) capability. It supports 2S/3S Li-ion batteries, delivers up to 97% peak efficiency at 9VIN/7.4VOUT/1.5AOUT, and enables system instant-on during dead-battery conditions in portable medical monitors and USB-C powered handheld radios.
For engineers reviewing the MAX77960BEFV12+ datasheet, MAX77960BEFV12+ pinout, MAX77960BEFV12+ application, or MAX77960BEFV12+ equivalent, key selection criteria include its programmable 100mA–3A charge current, 600kHz/1.2MHz switching frequency options, JEITA-compliant NTC thermistor interface, true load disconnect in reverse buck mode, and 4mm × 4mm 30-pin FC2QFN package with thermal foldback protection.
Technical Context
The MAX77960BEFV12+ implements a synchronous 4-switch buck-boost topology with integrated high-side and low-side power MOSFETs, enabling seamless transition between buck and boost modes across input voltages below, equal to, or above battery voltage. Its Smart Power Selector manages power path arbitration between CHGIN, BATT, and SYS rails without external components.
It features autonomous configuration via resistor-programmed pins (INLIM, ISET, VSET, ITO) and full I²C control (7-bit slave address 0x6B), supporting dynamic charge parameter updates, interrupt-driven status reporting (INTB), and real-time thermal regulation using die temperature sensing and external NTC thermistor (THM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 25.4V - supports USB PD, automotive, and wide-range DC adapters without pre-regulation. |
| Max Charge Current | 3A - programmable from 100mA to 3A via I²C or resistor; enables fast charging for 2S Li-ion packs (e.g., 7.4V nominal). |
| Reverse Buck Output | 5.1V/3A - powers USB OTG accessories directly from battery without external inductor or LDO. |
| Switching Frequency | 600kHz or 1.2MHz - selectable for optimal trade-off between efficiency, EMI, and inductor size in compact layouts. |
| Package | 4mm × 4mm, 30-pin FC2QFN - exposes thermal pad for low θJA (24.77°C/W) and high-power density in space-constrained designs. |
| JEITA Compliance | NTC-based thermistor monitoring (THM pin) - enables safe charging across temperature zones per JEITA standard for Li-ion safety. |
| Peak Efficiency | 97% at 9VIN/7.4VOUT/1.5AOUT - minimizes heat generation and extends battery runtime in thermally sensitive handheld devices. |
Pinout & Package
The MAX77960BEFV12+ is housed in a 4mm × 4mm, 30-pin FC2QFN package with exposed thermal pad (package code F304A4F+1), optimized for thermal dissipation in high-current charging applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHGIN | Primary input supply rail | Accepts 3.5V–25.4V input; includes OVLO (26.05V) and UVLO (3.5V) protection; supports AICL and input voltage regulation. |
| BATT | Battery connection node | Direct connection to 2S/3S Li-ion pack; integrates 10mΩ BATT-to-SYS switch with 10A overcurrent threshold and QBAT disable control. |
| SYS | System power rail output | Regulated output powering host processor and peripherals; supports Smart Power Selector for instant-on during deep discharge. |
| LX1 / LX2 | Power switch node outputs | Drive internal high-side/low-side FETs; require external inductors; LX1 rated to 30V, LX2 to 16V. |
| THM | NTC thermistor input | Analog input for JEITA-compliant battery temperature monitoring; enables charge suspend/resume based on thermal zone thresholds. |
| ISET | Fast-charge current setting | Resistor-programmable pin (100kΩ–10kΩ) to set constant-current charge level from 100mA to 3A; also configurable via I²C register. |
| INLIM | Input current limit setting | Resistor-programmable pin to set CHGIN current limit from 100mA to 3.15A; critical for USB-C source compliance and adapter derating. |
| OTGEN | OTG enable control | Active-high signal enabling reverse buck mode; when asserted, IC supplies 5.1V/3A from battery to VBUS for USB OTG accessories. |
| STAT | Charge status indicator | Open-drain output encoding 6 states (e.g., charging, done, fault) via pulse-width or logic levels per Table 10 in datasheet. |
| INTB | Interrupt output | Active-low, open-drain interrupt signaling charger events (e.g., timer expiry, thermal foldback, JEITA violation) to host MCU. |
Key Features
| Feature | Design Value |
|---|---|
| Smart Power Selector™ | Enables system startup even with dead or missing battery by regulating SYS from CHGIN while isolating BATT - eliminates need for backup supercap or auxiliary LDO. |
| True Load Disconnect in OTG Mode | Guarantees zero current leakage from battery to VBUS when OTG is disabled - meets USB Battery Charging v1.2 requirements for standby power budgeting. |
| Adaptive Input Current Limit (AICL) | Dynamically adjusts CHGIN current limit to maximize power extraction from weak or current-limited sources (e.g., legacy USB ports) without triggering source collapse. |
| Dual Switching Frequency Options | 600kHz (lower EMI, larger inductor) or 1.2MHz (smaller passive size, higher light-load efficiency) selected at boot via CNFG pin or I²C - simplifies layout reuse across product variants. |
| Differential Battery Voltage Sensing | BATSP/BATSN inputs provide Kelvin-sense accuracy for battery voltage measurement - ensures precise CV termination and avoids false charge completion due to PCB trace IR drop. |
Applications
| Medical Vital Sign Monitor | USB-C Powered Handheld Radio |
|---|---|
Use Scenario: Portable ECG/SpO₂ monitor operating from 2S Li-ion battery and USB-C wall adapter, requiring uninterrupted operation during battery swap and safe charging under clinical temperature constraints. IC Role / Device Role / Timing Role: Primary battery charger and power path manager; regulates SYS rail, enforces JEITA thermal zones via THM, and maintains system uptime using Smart Power Selector during battery insertion. Use Value: Eliminates cold-start failure with deeply discharged batteries; reduces bill-of-materials by integrating dual-mode buck-boost, OTG, and thermal monitoring in one 4mm² package. | Use Scenario: Ruggedized two-way radio with USB-C port for firmware updates and accessory power, deployed in field environments with variable ambient temperatures and mixed power sources. IC Role / Device Role / Timing Role: Wide-input charger supporting 9V–20V USB PD adapters and 12V vehicle power; provides 5.1V/3A OTG output to power Bluetooth headsets or GPS modules. Use Value: Enables single-port versatility (charge + data + accessory power); adaptive input current limit prevents brownout when connected to low-current automotive USB ports. |
| 2-in-1 Detachable Tablet | Digital Action Camera |
Use Scenario: Tablet with detachable keyboard base, where the tablet portion uses a 2S battery and must support simultaneous charging and OTG-powered accessories (e.g., USB-C SSD). IC Role / Device Role / Timing Role: Dual-role power management IC managing charge from dock or wall adapter, supplying SYS to SoC, and delivering regulated 5.1V to USB-C CC logic and VBUS during OTG mode. Use Value: Supports concurrent charging and peripheral power without performance throttling; reverse buck operates without additional inductor - saving PCB area and cost. | Use Scenario: Compact action camera recording 4K video with extended runtime, using a 3S Li-ion pack and requiring robust thermal management during high-power capture sessions. IC Role / Device Role / Timing Role: High-efficiency (97% peak) 3S charger with die temperature regulation and thermal foldback; monitors battery temp via NTC to prevent JEITA violations during rapid charging. Use Value: Sustains high frame-rate recording without thermal shutdown; 1.2MHz switching allows use of 1.0µH inductors, reducing solution height for ultra-thin form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ25792RTWR | 4.5V–24V input, 3.2A max charge, I²C-only programming (no resistor option), integrated ADC for voltage/current/temperature sensing. | Requires external NTC biasing and lacks true load disconnect in OTG mode; no dedicated STAT pin - status read via I²C registers only. | Select for designs needing high-precision telemetry and tighter integration with TI ecosystem; avoid if resistor-based configuration or hardware STAT signaling is required. |
| ISL9241IRZ-T | 3.5V–26V input, 3.2A max charge, supports NVDC architecture but no reverse buck/OTG output; requires external OTG controller for USB power delivery. | No integrated 5.1V/3A OTG regulator - adds component count and complexity for accessory power; lacks Smart Power Selector for dead-battery startup. | Choose when OTG functionality is unnecessary and priority is lowest quiescent current (15µA) in ship mode; not suitable for USB-C OTG-enabled products. |
Compared with BQ25792RTWR and ISL9241IRZ-T, the MAX77960BEFV12+ uniquely combines resistor/I²C dual programming, hardware STAT and INTB signaling, true OTG load disconnect, and Smart Power Selector - making it optimal for cost-sensitive, space-constrained USB-C portable devices requiring guaranteed dead-battery boot.
Availability
The MAX77960BEFV12+ is available at Aetrix Electronics and suitable for USB-C powered handheld radios, 2-in-1 tablets, and portable medical monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77960BEFV12+ 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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and consumer applications.
The MAX77960B series targets high-density, feature-rich portable electronics - delivering integrated buck-boost charging, Smart Power Selector, and USB OTG in a single FC2QFN package to simplify power architecture for 2S/3S Li-ion systems.
FAQ
What is the maximum supported battery configuration for the MAX77960BEFV12+?
The MAX77960BEFV12+ is specifically designed for 2-cell (2S) and 3-cell (3S) Li-ion battery packs, with charge termination voltages programmable up to 8.4V (2S) or 12.6V (3S). Its buck-boost architecture maintains regulation across input voltages both below and above battery voltage, ensuring compatibility with standard 2S/3S configurations without external level-shifting or mode-switching circuitry.
Does the MAX77960BEFV12+ support USB On-The-Go (OTG) functionality?
Yes, the MAX77960BEFV12+ integrates a reverse buck converter that delivers a regulated 5.1V/3A output from the battery to power USB OTG accessories. It features true load disconnect when OTG is disabled, preventing battery drain, and uses the OTGEN pin for hardware-controlled enable/disable - eliminating the need for external switches or regulators in OTG-capable designs.
How is thermal management implemented in the MAX77960BEFV12+?
The MAX77960BEFV12+ employs dual thermal protection: die temperature regulation via an internal thermal foldback loop that reduces charge current above 110°C junction temperature, and JEITA-compliant battery temperature monitoring using the THM pin and external NTC thermistor. Both mechanisms operate independently to ensure safe charging across environmental and operational conditions.
Can the MAX77960BEFV12+ be configured without I²C communication?
Yes, the MAX77960BEFV12+ supports fully autonomous operation using resistor-programmed pins: INLIM sets input current limit (100mA–3.15A), ISET sets fast-charge current (100mA–3A), VSET sets charge termination voltage (4.2V–4.4V per cell), and ITO sets top-off current. This enables standalone charging functionality without MCU intervention or firmware development.
What package type and thermal performance does the MAX77960BEFV12+ use?
The MAX77960BEFV12+ uses a 4mm × 4mm, 30-pin FC2QFN package (F304A4F+1) with exposed thermal pad. Its thermal resistance is characterized at θJA = 24.77°C/W and θJC = 1.67°C/W on a four-layer board, enabling efficient heat transfer to the PCB ground plane - critical for sustaining 3A charge currents in compact, sealed enclosures.
MAX77960BEFV12+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 30-PowerUFQFN
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- -
- Voltage - Input:
- 3.5V ~ 25.4V
- Number of Outputs:
- 1
- Voltage - Output:
- 8V ~ 13.05V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 30-FC2QFN (4x4)
MAX77960BEFV12+ FAQ
1.How can I place an order for MAX77960BEFV12+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77960BEFV12+ 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 MAX77960BEFV12+ reliable?
The price and inventory of MAX77960BEFV12+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77960BEFV12+ is usually 5 days.
3.What payment methods are accepted for MAX77960BEFV12+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77960BEFV12+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77960BEFV12+?
MAX77960BEFV12+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77960BEFV12+ 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 MAX77960BEFV12+?
For technical support, including MAX77960BEFV12+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77960BEFV12+ requirements.
6.How does Aetrix verify that MAX77960BEFV12+ is sourced from the original manufacturer or authorized distributors?
All MAX77960BEFV12+ 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 MAX77960BEFV12+ meets industry standards.
7.What is the process for return or replacement of MAX77960BEFV12+?
All MAX77960BEFV12+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77960BEFV12+, 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 MAX77960BEFV12+ part is unused and in its original packaging.
Return procedure for MAX77960BEFV12+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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