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Analog Devices Inc./Maxim Integrated MAX77756BEWL+G7
- Part No.:
- MAX77756BEWL+G7
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 15-WFBGA, WLBGA
- Datasheet:
-
MAX77756BEWL+G7.pdf
- Description:
- IC REG BUCK 3.3V 500MA 15WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,543
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Product details
Overview
MAX77756BEWL+G7 from Maxim Integrated is a 24V-input, 500mA synchronous step-down DC-DC converter with integrated dual-input ideal-diode power multiplexer (MUX). It operates from 3.0V to 24V input, delivers factory-set 1.8V/3.3V/5.0V or I²C-adjustable 1.5V–7.5V output, and features 1.5μA quiescent current (SUP-only) for always-on rails in battery-backed systems.
For engineers reviewing the MAX77756BEWL+G7 datasheet, MAX77756BEWL+G7 pinout, MAX77756BEWL+G7 application, or MAX77756BEWL+G7 equivalent, key selection criteria include dual-source ORing capability, ultra-low IQ operation, I²C programmability, and wafer-level package integration for space-constrained USB PD accessories and smart hubs.
Technical Context
The device integrates a peak-current-mode PWM buck regulator with load-line architecture and a dual-channel P-FET power MUX that automatically selects the higher of two input sources (IN1/IN2) to supply the SUP rail. Control logic ensures only one MUX channel conducts at a time, with 400mV switchover hysteresis to prevent chattering.
It supports hardware enable (EN), I²C interface (SCL/SDA at up to 1MHz), programmable peak inductor current (700–1000mA via ILIM pin or register), and spread-spectrum switching to reduce EMI. The BIAS LDO powers internal circuitry and enables clean sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 24V - supports USB PD provider, main/backup batteries, and solar inputs without external pre-regulation. |
| Output Current | 500mA max - sufficient for powering microcontrollers, sensors, and low-power peripherals in portable electronics. |
| Quiescent Current | 1.5μA (SUP-only), 19μA (IN1/IN2 powered) - enables multi-week battery life in always-on backup rails. |
| Output Voltage Options | Factory-default 1.8V/3.3V/5.0V or I²C-programmable 1.5V–7.5V in 50mV steps - eliminates external resistor networks for flexible system-level voltage scaling. |
| Switching Frequency | 1.0MHz typical - allows use of compact 10μH inductors and reduces solution footprint vs. lower-frequency converters. |
| Package | 15-bump WLP, 2.33mm × 1.42mm × 0.7mm - ultra-small footprint for thin-profile wearables and dongles. |
| Power MUX RON | 250mΩ per channel - cuts conduction loss by >50% vs. Schottky diode ORing, improving thermal performance and efficiency. |
Pinout & Package
MAX77756BEWL+G7 uses a 15-bump wafer-level package (WLP) with 0.4mm pitch in a 3×5 array (outline 21-100111, land pattern 90-100052). The package is lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 / IN2 | Dual-input power MUX channels | Independent 24V-rated inputs; automatic ORing selects higher voltage source to SUP; connect either to PGND to disable that channel. |
| SUP | Power MUX output & buck input | Supplies buck converter; must be bypassed with 1μF ceramic capacitor; not prebiased when using IN1/IN2. |
| LX | Switching node | Connects to 10μH inductor; high-impedance when disabled; internal clamp diodes require careful layout to avoid exceeding power dissipation limits. |
| OUT/FB | Output sense / feedback input | Internal feedback: direct VOUT sensing; external feedback: resistor divider input with 5.6pF feed-forward cap for stability. |
| EN | Hardware enable | Logic-compatible with SUP domain; drives low to disable entire IC including MUX and buck; interacts with I²C EN_BIT. |
| ILIM | Peak inductor current select | Pin-strapped to PGND (700mA), BIAS (1000mA), or controlled via I²C; sets overcurrent protection threshold. |
| SCL / SDA | I²C interface | Supports 1MHz clock; requires pullups to VIO; VIO range 1.7V–5.5V; enables dynamic VOUT reconfiguration and telemetry readback. |
| POK | Open-drain Power OK | Asserts high when VOUT is within ±2% of regulation; 12μs debounce; sinks up to 20mA; requires external pullup. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-input ideal-diode MUX | Replaces discrete Schottky ORing with 250mΩ P-FETs, reducing forward drop, heat, and BOM count while enabling seamless source switchover. |
| Ultra-low quiescent current | 1.5μA (SUP-only) extends battery life in maintenance-mode applications such as smart home hubs and IoT backup rails. |
| I²C programmable output | Enables runtime voltage adjustment (1.5V–7.5V, 50mV steps) and register-based configuration without hardware changes or rework. |
| Load-line regulation architecture | Provides critically damped transient response and reduces required output capacitance by ~30% compared to classical integrator-based controllers. |
| Integrated BIAS LDO | 5V regulated output powers internal logic and can supply external low-current circuits, simplifying multi-rail power tree design. |
Applications
| USB Type-C Power Delivery Accessories | Notebook and Tablet Computers |
|---|---|
Use Scenario: Dual-source power management in USB-C docks supporting both host-powered and self-powered modes. IC Role / Device Role / Timing Role: Primary buck regulator + automatic ORing controller selecting between USB PD bus and internal battery. Use Value: Eliminates need for external ideal diodes and discrete regulators, reducing solution size by 40% and enabling sub-10mm-thick form factors. | Use Scenario: Always-on auxiliary rail for keyboard backlight, touchpad, and sensor hub during suspend-to-RAM. IC Role / Device Role / Timing Role: Low-IQ buck supplying 3.3V standby rail with fast wake-up (<8ms soft-start) and POK signaling to SoC. Use Value: Achieves <2μA system sleep current with guaranteed 99% VOUT wake threshold, extending battery life by >15% in modern ultrabooks. |
| Home Automation Smart Hubs | Battery-Powered Backup Systems |
Use Scenario: Centralized power manager in Zigbee/Z-Wave hubs requiring simultaneous 1.8V (radio), 3.3V (MCU), and 5.0V (USB port) rails. IC Role / Device Role / Timing Role: Configurable single-output buck with I²C reprogramming to adapt voltage per subsystem demand. Use Value: Enables firmware-driven rail optimization-e.g., lowering VOUT to 1.8V during radio-only operation-reducing average power by 35%. | Use Scenario: Seamless transition between primary AC adapter and secondary Li-ion backup in security cameras and network routers. IC Role / Device Role / Timing Role: Dual-input MUX + buck delivering stable 5.0V output regardless of source priority or voltage drift. Use Value: Prevents brownouts during source switchover (tsw < 100μs) and maintains 99% regulation across 3V–24V input range, ensuring uninterrupted operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX77596EWA+T | No integrated power MUX; 3.0V–24V input, 500mA buck only; same WLP package and I²C interface. | Suitable only for single-input applications; lacks automatic source selection and ORing logic. | Select when MUX functionality is unnecessary and cost reduction is prioritized over dual-source flexibility. |
| TPS63020DSJR | Buck-boost topology (2.5V–5.5V input); no MUX; 3A output; different control scheme and pinout. | Used where input may fall below output (e.g., single-cell Li-ion); incompatible with 24V inputs or dual-source ORing. | Choose only for wide-input-range buck-boost needs; not a functional substitute for MAX77756BEWL+G7's MUX + buck architecture. |
Compared with MAX77756BEWL+G7, MAX77596EWA+T removes MUX complexity but forfeits dual-source resilience, while TPS63020DSJR offers higher current and buck-boost capability at the cost of 24V compatibility and ORing functionality-making MAX77756BEWL+G7 uniquely suited for USB PD accessory and backup-rail designs requiring integrated source arbitration.
Availability
MAX77756BEWL+G7 is available at Aetrix Electronics and suitable for USB Type-C accessories, notebook auxiliary rails, smart home hubs, and battery-backed industrial controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77756BEWL+G7 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, computing, and consumer applications.
The MAX77756 belongs to Maxim's ultra-low-power, highly integrated PMIC family targeting space-constrained portable electronics requiring dual-input resilience, programmable regulation, and minimal quiescent current.
FAQ
What input voltage ranges does the MAX77756BEWL+G7 support?
The MAX77756BEWL+G7 supports an input voltage range of 3.0V to 24V on its SUP, IN1, and IN2 pins. This enables direct compatibility with USB PD providers (5V–20V), 12V wall adapters, 24V industrial supplies, and backup batteries. Absolute maximum ratings allow transient exposure up to +26V on IN1/IN2/SUP, but continuous operation must remain within the 3V–24V specification band to ensure reliability and regulation accuracy.
Can the MAX77756BEWL+G7 operate with only one input source?
Yes, the MAX77756BEWL+G7 can operate with a single input source. To bypass the dual-input power MUX, connect both IN1 and IN2 to PGND and apply the input directly to the SUP pin. In this configuration, the buck converter functions as a standard 3V–24V input, 500mA step-down regulator with full I²C programmability and low-IQ operation-retaining all core features except automatic source selection.
How is output voltage configured on the MAX77756BEWL+G7?
The MAX77756BEWL+G7 supports three output configuration methods: (1) factory-programmed default (1.8V, 3.3V, or 5.0V depending on variant), (2) external resistor divider on OUT/FB for 1V–99% VSUP adjustment, or (3) I²C register writes to set VOUT from 1.5V to 7.5V in 50mV increments. All methods coexist-the I²C interface remains active even with external feedback, enabling dynamic reconfiguration during system operation.
What is the purpose of the BIAS pin on the MAX77756BEWL+G7?
The BIAS pin on the MAX77756BEWL+G7 provides a regulated 5V output from an internal LDO, used to power internal circuitry and optionally supply low-current external components (e.g., level shifters or supervisors). It must be bypassed with a 1μF ceramic capacitor to AGND. Loading BIAS externally beyond 1mA risks regulation loss and should be avoided unless explicitly validated in the target application.
Does the MAX77756BEWL+G7 include thermal protection?
Yes, the MAX77756BEWL+G7 includes thermal shutdown protection that activates at +165°C junction temperature, with +15°C hysteresis. When triggered, the device disables both the buck converter and power MUX until the junction cools below +150°C. This protection is fully integrated and requires no external components. Layout best practices-including thermal vias under the PGND pad and minimal copper isolation-ensure reliable operation up to the rated 1298mW power dissipation limit at +70°C ambient.
MAX77756BEWL+G7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 15-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLP (2.33x1.42)
MAX77756BEWL+G7 FAQ
1.How can I place an order for MAX77756BEWL+G7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77756BEWL+G7 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 MAX77756BEWL+G7 reliable?
The price and inventory of MAX77756BEWL+G7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77756BEWL+G7 is usually 5 days.
3.What payment methods are accepted for MAX77756BEWL+G7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77756BEWL+G7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77756BEWL+G7?
MAX77756BEWL+G7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77756BEWL+G7 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 MAX77756BEWL+G7?
For technical support, including MAX77756BEWL+G7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77756BEWL+G7 requirements.
6.How does Aetrix verify that MAX77756BEWL+G7 is sourced from the original manufacturer or authorized distributors?
All MAX77756BEWL+G7 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 MAX77756BEWL+G7 meets industry standards.
7.What is the process for return or replacement of MAX77756BEWL+G7?
All MAX77756BEWL+G7 units undergo pre-shipment inspection (PSI). If there is an issue with MAX77756BEWL+G7, 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 MAX77756BEWL+G7 part is unused and in its original packaging.
Return procedure for MAX77756BEWL+G7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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