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Analog Devices Inc./Maxim Integrated MAX77756BEWL+TG7
- Part No.:
- MAX77756BEWL+TG7
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 15-WFBGA, WLBGA
- Datasheet:
-
MAX77756BEWL+TG7.pdf
- Description:
- IC REG BUCK 3.3V 500MA 15WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,744
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Product details
Overview
MAX77756BEWL+TG7 from Maxim Integrated is a 24V-input, 500mA synchronous step-down DC-DC converter with integrated dual-input power multiplexer (MUX), operating from 3.0V to 24V input, delivering factory-default 1.8V/3.3V/5.0V or I²C-adjustable 1.5V–7.5V output, and featuring 1.5μA quiescent current in SUP-only mode for always-on battery-backed rails in USB PD accessories and smart hubs.
For engineers reviewing the MAX77756BEWL+TG7 datasheet, MAX77756BEWL+TG7 pinout, MAX77756BEWL+TG7 application, or MAX77756BEWL+TG7 equivalent, key selection criteria include dual-source ORing capability, wafer-level package footprint constraints, I²C programmability of output voltage, and thermal shutdown at +165°C with 15°C hysteresis.
Technical Context
The device implements a peak-current-mode PWM buck controller with fixed 1MHz switching frequency (±6% spread-spectrum enabled), load-line architecture for optimized transient response, and integrated 250mΩ P-MOSFETs in the dual-input MUX that automatically select the higher of IN1 or IN2 to supply the SUP rail-ensuring no cross-conduction via time-multiplexed channel activation.
Control logic includes hardware/software enable (EN pin or I²C EN_BIT), pin-programmable inductor peak current limit (700–1000mA), soft-start ramp (4ms or 8ms), and a dedicated BIAS LDO for internal circuitry; all functions operate within –40°C to +85°C ambient, with junction temperature limited to +150°C and thermal shutdown at +165°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 24V - supports wide-range sources including USB PD providers, backup batteries, and solar arrays. |
| Output Current | 500mA max - sufficient for powering microcontrollers, sensors, and low-power peripherals in portable systems. |
| Output Voltage Options | Factory-set 1.8V/3.3V/5.0V or I²C-programmable 1.5V–7.5V in 50mV steps - enables flexible rail generation without external resistor changes. |
| Quiescent Current | 1.5μA (SUP only) / 19μA (IN1/IN2 powered) - sustains ultra-low-power operation in always-on backup rails. |
| Power MUX On-Resistance | 250mΩ (IN1/IN2 to SUP) - reduces conduction loss vs. Schottky diode ORing, minimizing heat and board area. |
| Switching Frequency | 1.0MHz ±6% with spread spectrum - balances EMI reduction and inductor size; avoids AM radio band interference. |
| Thermal Shutdown | +165°C with +15°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
MAX77756BEWL+TG7 uses a 2.33mm × 1.42mm, 0.7mm max height, 15-bump wafer-level package (WLP) with 0.4mm pitch in a 3×5 array (Package Code: W151G2+1, Outline No.: 21-100111).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 / IN2 | Dual-input power MUX source terminals | Accept independent 3V–24V inputs; MUX selects higher voltage to drive SUP; connect to PGND to disable channel. |
| SUP | Power MUX output & buck input supply | Must be bypassed with 1μF ceramic capacitor; not prebiased when powered from IN1/IN2. |
| LX | Switching node | Connects to external 10μH inductor; high-impedance when disabled; contains internal clamp diodes to PGND/SUP. |
| OUT/FB | Output sense / feedback input | Internal feedback: direct VOUT sensing; external feedback: resistor divider input; requires 5.6pF feed-forward cap if used. |
| POK | Open-drain Power OK output | Asserts high when VOUT ≥90% of regulation target; requires external pullup; debounced with 12μs timer. |
| EN | Enable control input | Logic-high (>1.4V) enables both MUX and buck; compatible with SUP voltage domain; interacts with I²C EN_BIT. |
| ILIM | Peak inductor current limit select | PGND = 700mA, BIAS = 1000mA; I²C writes accepted only when ILIM is logic-low. |
| VIO / SDA / SCL | I²C interface supply & bidirectional signals | VIO powers I/O stage (1.7–5.5V); SDA/SCL require pullups to VIO; unused pins must tie to PGND. |
| BIAS | Internal LDO output | 5V regulated supply for internal circuits; bypass with 1μF ceramic to AGND; do not load externally. |
| AGND / PGND | Analog & power ground | AGND connects to PGND on PCB; return BIAS cap to AGND, SUP/OUT caps to PGND. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-input ideal-diode ORing MUX | Replaces discrete Schottky arrays with 250mΩ P-MOSFETs, eliminating forward-voltage drop and reducing solution size by >50%. |
| I²C programmable output voltage | Enables dynamic rail adjustment (1.5V–7.5V, 50mV steps) without hardware change-critical for firmware-upgradable power domains. |
| Load-line voltage positioning | Delivers critically damped transient response: output drops <40mV under 500mA step load, reducing required output capacitance by ~30% vs. classical controllers. |
| Ultra-low IQ standby mode | Reduces system standby power to 1.5μA (SUP only), extending battery life in always-on IoT hubs and backup rails beyond 1 year. |
| Integrated safety protections | Includes hiccup-mode short-circuit protection, thermal shutdown (+165°C), soft-start (4/8ms), and overvoltage lockout (2.75V UVLO with 300mV hysteresis). |
Applications
| USB Type-C Power Delivery Accessories | Notebook and Tablet Computers |
|---|---|
Use Scenario: Dual-source power management in portable docks supporting both host USB PD and local battery backup. IC Role / Device Role / Timing Role: Primary buck regulator and automatic ORing switch selecting between USB PD provider (IN1) and internal Li-ion battery (IN2) to maintain uninterrupted 3.3V system rail. Use Value: Eliminates need for external ideal diodes and discrete buck controller, reducing BOM count by 7 parts and PCB area by 22 mm². | Use Scenario: Always-on auxiliary rail generation for embedded controllers, sensors, and secure elements during suspend-to-RAM states. IC Role / Device Role / Timing Role: Low-IQ 1.8V/3.3V buck supplying real-time clock, touch controller, and firmware update subsystems while main CPU is powered down. Use Value: 1.5μA quiescent current extends battery hold-up time from hours to weeks, enabling reliable wake-from-suspend functionality. |
| Home Automation Smart Hubs | Battery-Powered Backup Systems |
Use Scenario: Multi-rail power delivery in voice-controlled hubs with Zigbee/Z-Wave radios, MCU, and LED indicators. IC Role / Device Role / Timing Role: Single-chip solution providing 3.3V for MCU/radio and 5.0V for USB peripherals, with I²C reconfiguration for firmware-defined rail sequencing. Use Value: I²C programmability allows one hardware design to support multiple hub SKUs, cutting NRE costs by consolidating 3 variants into 1 BOM. | Use Scenario: Seamless switchover between primary AC/DC adapter and secondary LiFePO₄ backup battery in uninterruptible sensor gateways. IC Role / Device Role / Timing Role: Dual-input MUX ensures zero-interruption power transfer (<100ns switchover) while buck maintains stable 5.0V output during brownout events. Use Value: 400mV switchover hysteresis prevents oscillation during marginal input conditions, ensuring robust operation across 1000+ cycle field deployments. |
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; 3V–24V input, 500mA buck only; same WLP package and I²C interface. | Requires external ideal-diode ORing for dual-source apps; suitable where MUX is unnecessary or implemented discretely. | Select when cost sensitivity outweighs integration benefit, or when existing designs already use discrete MUX. |
| TPS63020DSJR | Buck-boost topology (2.5V–5.5V input, 1.2V–5.5V output); no MUX; 3A output; 2mm × 2mm QFN. | Supports input voltages below 3V and outputs above input; lacks dual-input selection logic and ultra-low IQ standby mode. | Select for single-source battery-powered systems needing wider Vin/Vout flexibility but no ORing capability. |
Compared with MAX77596EWA+T, MAX77756BEWL+TG7 integrates the MUX to eliminate external FETs and reduce solution size; compared with TPS63020DSJR, it offers superior IQ (1.5μA vs. 30μA) and dual-input autonomy but lacks buck-boost capability-making it optimal for fixed-rail, multi-source industrial IoT nodes.
Availability
MAX77756BEWL+TG7 is available at Aetrix Electronics and suitable for USB Type-C PD accessories, notebook auxiliary rails, home automation smart hubs, and battery-backed uninterruptible systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant wafer-level packaging.
Supply support for MAX77756BEWL+TG7 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, automotive, and computing applications.
The MAX77756BEWL+TG7 belongs to Maxim's ultra-low-power PMIC family targeting space-constrained, battery-sensitive systems-designed specifically to replace discrete power MUX + buck combinations in USB PD, smart home, and always-on edge devices.
FAQ
What is the absolute maximum input voltage rating for MAX77756BEWL+TG7?
The absolute maximum voltage on IN1, IN2, and SUP pins is +26V relative to PGND. Exceeding this may cause permanent damage. The recommended operating range remains 3.0V to 24V. MAX77756BEWL+TG7 includes internal clamp diodes on LX to PGND and SUP, but forward-biasing these must stay within package power dissipation limits (1298mW at +70°C, derated 16.22mW/°C above).
Can MAX77756BEWL+TG7 operate with only one input source?
Yes. For single-input applications, connect IN1 and IN2 to PGND and power the device directly through the SUP pin. This bypasses the MUX entirely, allowing the buck converter to function normally using only the SUP supply. MAX77756BEWL+TG7 retains full I²C programmability, soft-start, and protection features in this configuration.
How does the MAX77756BEWL+TG7 handle switchover between IN1 and IN2?
MAX77756BEWL+TG7 uses automatic ideal-diode ORing with 400mV channel-selection hysteresis: the off channel must exceed the on channel by at least 200mV before switchover occurs. This prevents chattering during marginal voltage conditions. Switchover is seamless and occurs only when the buck is enabled; both channels turn off during shutdown.
What is the purpose of the BIAS pin on MAX77756BEWL+TG7?
The BIAS pin provides a regulated 5V internal supply for MAX77756BEWL+TG7's analog and digital blocks. It must be bypassed with a 1μF ceramic capacitor to AGND and must not be loaded externally. When VSUP is 5.5V–24V and BIAS is not internally connected to OUT, VBIAS remains stable at 5V-enabling consistent performance across wide input ranges.
Does MAX77756BEWL+TG7 support external feedback for output voltage adjustment?
Yes. MAX77756BEWL+TG7 supports two feedback modes: internal (factory-default 1.8V/3.3V/5.0V) and external (resistor divider from VOUT to AGND). In external mode, output is adjustable from 1V to 99% of VSUP; the FB pin accepts the divider's midpoint, and a 5.6pF feed-forward capacitor is required between VOUT and FB to ensure stability.
MAX77756BEWL+TG7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 15-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- 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+TG7 FAQ
1.How can I place an order for MAX77756BEWL+TG7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77756BEWL+TG7 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+TG7 reliable?
The price and inventory of MAX77756BEWL+TG7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77756BEWL+TG7 is usually 5 days.
3.What payment methods are accepted for MAX77756BEWL+TG7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77756BEWL+TG7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77756BEWL+TG7?
MAX77756BEWL+TG7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77756BEWL+TG7 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+TG7?
For technical support, including MAX77756BEWL+TG7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77756BEWL+TG7 requirements.
6.How does Aetrix verify that MAX77756BEWL+TG7 is sourced from the original manufacturer or authorized distributors?
All MAX77756BEWL+TG7 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+TG7 meets industry standards.
7.What is the process for return or replacement of MAX77756BEWL+TG7?
All MAX77756BEWL+TG7 units undergo pre-shipment inspection (PSI). If there is an issue with MAX77756BEWL+TG7, 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+TG7 part is unused and in its original packaging.
Return procedure for MAX77756BEWL+TG7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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