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Analog Devices Inc./Maxim Integrated MAX77813EWP45+T
- Part No.:
- MAX77813EWP45+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFBGA, WLBGA
- Datasheet:
-
MAX77813EWP45+T.pdf
- Description:
- IC REG BUCK BOOST PROG 3A 20WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,327
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Product details
Overview
MAX77813EWP45+T from Analog Devices is a synchronous buck-boost DC-DC converter optimized for single-cell Li+/Li-ion battery systems. It delivers regulated output from 2.6V to 5.14V across 2.3V–5.5V input, supports up to 3A in buck mode and 2A in boost mode, features 2.5MHz switching, I²C programmability, and operates in a 2.13mm × 1.83mm 20-bump WLP package for compact portable power rails.
For engineers reviewing the MAX77813EWP45+T datasheet, MAX77813EWP45+T pinout, MAX77813EWP45+T application, or MAX77813EWP45+T equivalent, key selection criteria include I²C-configurable VOUT (20mV steps), dual-mode current limits (ILIM-selectable), high-efficiency transient response, and thermal/overvoltage protection - all critical for AR/VR headsets, mobile payment terminals, and handheld scanners.
Technical Context
The MAX77813EWP45+T implements a fixed-frequency (2.5MHz) current-mode PWM control scheme with H-bridge topology using a single inductor. Its three-phase switching (Φ1–Φ3) enables seamless buck-to-boost transition without discontinuity, delivering stable regulation during line transients (e.g., VIN step from 3.4V to 2.9V yields ≤50mV VOUT deviation at 1.5A load).
It integrates dedicated hardware control (EN, POK, ILIM) alongside optional I²C interface (up to 3.4MHz Fast-Mode Plus) for dynamic voltage scaling and fault read-back. Protection includes soft-start, thermal shutdown (+165°C), overvoltage (120% default), and cycle-by-cycle overcurrent limiting with burst-mode enhancement for transient loads exceeding ILIM_LX for <800µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.30V to 5.5V - supports full discharge curve of single-cell Li+/Li-ion (2.7V–4.2V nominal) without dropout or shutdown. |
| VOUT Range | 2.60V to 5.14V in 20mV steps via I²C - enables precise rail matching for USB PD, display bias, or SoC core voltages. |
| Max Output Current | 3A in buck mode (ILIM = high); 2A in boost mode - sufficient for 3.3V/2A system rails or 5V/1.5A peripheral supplies. |
| Switching Frequency | 2.5MHz (typ) - allows use of small 1µH inductors and minimizes EMI in space-constrained layouts. |
| Peak Efficiency | 97% - reduces thermal load in sealed enclosures like AR/VR headsets and handheld scanners. |
| Quiescent Current | 55µA (typ) in SKIP mode - extends battery runtime during low-power standby states. |
| I²C Speed | Up to 3.4MHz Fast-Mode Plus - enables rapid VOUT reconfiguration during system state transitions (e.g., display on/off). |
Pinout & Package
MAX77813EWP45+T uses a 20-bump wafer-level package (WLP), 2.13mm × 1.83mm, 0.4mm pitch, bottom-side bump layout. Thermal resistance θJA = 55.49°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN, OUT | Power input/output nodes | High-current paths requiring low-impedance PCB copper; IN bypassed with 10µF ceramic, OUT with 47µF ceramic. |
| LX1, LX2 | H-bridge switching nodes | Connect to opposite ends of single 1µH inductor; subject to fast dV/dt - require tight loop routing and ground shielding. |
| VSYS, PGND, AGND | System supply, power ground, analog ground | VSYS ties to battery anode; PGND/AGND must be connected on PCB per layout guidelines to avoid noise coupling into FB/POK. |
| FB | Output voltage feedback | Resistive divider from OUT to AGND sets VOUT; accuracy ±1.0% in FPWM mode ensures stable SoC core voltage. |
| EN, ILIM, POK | Enable, current limit select, power-ok indicator | EN has internal 800kΩ pulldown; ILIM selects 4.5A/1.8A inductor limit; POK is open-drain with 75–80% trip threshold for system sequencing. |
| SCL, SDA, VIO | I²C interface and IO supply | VIO powers I²C logic (1.7–3.6V); SCL/SDA require external 1.5–2.2kΩ pullups to VIO for reliable 3.4MHz operation. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Eliminates output glitches during VIN crossing VOUT - essential for uninterrupted operation in battery-powered devices with varying SOC. |
| SKIP mode with 55µA IQ | Extends light-load battery life by >3× vs. forced-PWM; maintains regulation while minimizing switching losses below ~50mA. |
| I²C programmable slew rate | Configurable VOUT ramp-up (20/40mV/µs) and ramp-down (5/10mV/µs) prevents inrush into downstream capacitive loads during dynamic voltage scaling. |
| Burst-mode transient response | Temporarily raises ILIM_LX to 5.5A (ILIM = high) for ≤800µs to sustain regulation during sudden 1.5A load steps - avoids brownout in processor wake events. |
| Integrated OVP and thermal shutdown | OVP triggers at 120% VOUT (configurable); thermal shutdown at +165°C with +20°C hysteresis - protects IC and load during fault conditions without external circuitry. |
Applications
| Handheld Scanners | Mobile Payment Terminals |
|---|---|
Use Scenario: Battery-powered barcode scanner with LED illumination and CMOS imager requiring stable 3.3V and 5V rails during intermittent high-current bursts. IC Role / Device Role / Timing Role: Primary system power regulator managing both buck (battery → 3.3V) and boost (battery → 5V for LED driver) conversion from single cell. Use Value: 97% peak efficiency and 55µA quiescent current extend scan session time; I²C allows firmware-controlled VOUT adjustment for different illumination modes. | Use Scenario: EMV-compliant card reader with secure element, NFC, and display, operating across full Li-ion voltage range (4.2V down to 2.7V). IC Role / Device Role / Timing Role: Central buck-boost supplying 3.3V to MCU/NFC and 5V to display backlight, maintaining regulation during RF transmission current spikes. Use Value: Seamless mode transition prevents display flicker or NFC timeout; POK signal enables safe firmware boot sequencing after power stabilization. |
| AR/VR Headsets | Security Cameras (Battery) |
Use Scenario: Compact wearable headset with micro-OLED display, IMU, and wireless comms drawing variable load from 100mA (idle) to 2.5A (rendering + streaming). IC Role / Device Role / Timing Role: Single-chip power solution delivering 2.8V (OLED), 3.3V (SoC), and 5V (Wi-Fi module) from one Li-ion cell with minimal board area. Use Value: 2.5MHz switching enables tiny 1µH inductor footprint; thermal shutdown protects against skin-contact temperature rise during extended use. | Use Scenario: Wireless outdoor security camera powered by Li-ion with motion-triggered 1.2A imaging + 500mA Wi-Fi upload bursts. IC Role / Device Role / Timing Role: High-efficiency buck-boost maintaining 3.3V system rail during rapid battery voltage decay (3.8V → 3.0V) without reset or dropout. Use Value: Line transient response ≤50mV ensures clean video capture during battery sag; ILIM pin allows hardware-selectable current limit for cost-optimized inductor choice. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63802DLAR | Fixed 3.3V/5.0V outputs only; no I²C; 2.4MHz switching; 2.5A max output | Lacks programmable VOUT and dynamic scaling - suitable only for static-rail designs | Select when I²C control and fine-grained VOUT tuning are unnecessary and BOM simplicity is prioritized. |
| NCP1529MUTBG | Non-synchronous buck-boost; 1.2MHz; 1.2A max; no ILIM pin or burst mode | Lower efficiency (≤92%), higher IQ (120µA), limited transient capability - not suitable for high-performance portable devices | Consider only for cost-sensitive, low-current (<800mA), non-battery-critical applications where size and efficiency are secondary. |
Compared with TPS63802DLAR and NCP1529MUTBG, MAX77813EWP45+T uniquely combines I²C-programmable VOUT, dual-mode current limiting, burst-mode transient support, and ultra-low quiescent current - making it optimal for dynamically managed, space-constrained, battery-life-sensitive systems.
Availability
MAX77813EWP45+T is available at Aetrix Electronics and suitable for handheld scanners, AR/VR headsets, and mobile payment terminals requiring stable component supply with consistent parametric performance and long-term lifecycle support.
Supply support for MAX77813EWP45+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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The MAX77813EWP45+T belongs to Analog Devices' MAX® power management portfolio, designed specifically for ultra-compact, high-efficiency power conversion in battery-powered portable electronics with stringent size, efficiency, and transient response requirements.
FAQ
What is the factory-default output voltage for MAX77813EWP45+T?
The MAX77813EWP45+T has a factory-default startup output voltage of 3.3V, confirmed in the Ordering Information table of the official datasheet. This value is stored in the VOUT[6:0] register and can be overwritten via I²C at any time. The device retains the programmed VOUT until reset or power cycle, enabling flexible system-level voltage configuration without hardware changes.
Does MAX77813EWP45+T support true hardware-only operation without I²C?
Yes, MAX77813EWP45+T operates fully in hardware-only mode: EN enables/disables regulation, ILIM selects current limit, and POK provides power-good status - all without I²C. VOUT defaults to 3.3V at startup. I²C is optional for dynamic reconfiguration; removing SCL/SDA lines and pulling VIO to AGND disables the interface while preserving full buck-boost functionality.
What is the recommended inductor for MAX77813EWP45+T when ILIM is set high?
For MAX77813EWP45+T with ILIM = high, Analog Devices recommends a 1µH shielded power inductor rated for ≥7A saturation current (e.g., Coilcraft XAL5030-102MEB). This ensures stable operation at up to 3A buck or 2A boost output while maintaining margin against core saturation during burst-mode transients and thermal derating.
How does the MAX77813EWP45+T handle input voltage drops below 2.3V?
Below 2.3V, MAX77813EWP45+T enters undervoltage lockout (UVLO) with a falling threshold of 2.05V. The device ceases switching and holds output in high-impedance state until VSYS rises above 2.375V (rising threshold). This prevents erratic operation or unregulated output during deep battery discharge, protecting downstream circuitry from brownout conditions.
Can MAX77813EWP45+T drive multiple independent output rails?
No, MAX77813EWP45+T generates a single regulated output voltage (VOUT) from its OUT pin. It cannot independently regulate multiple rails. However, its I²C interface allows dynamic reconfiguration of that single rail (e.g., switching between 2.8V for OLED and 3.3V for MCU), and external LDOs or DC-DC converters can be fed from OUT to create auxiliary voltages with appropriate sequencing.
MAX77813EWP45+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.6V
- Voltage - Output (Max):
- 5.14V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLP (1.83x2.13)
MAX77813EWP45+T FAQ
1.How can I place an order for MAX77813EWP45+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77813EWP45+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 MAX77813EWP45+T reliable?
The price and inventory of MAX77813EWP45+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77813EWP45+T is usually 5 days.
3.What payment methods are accepted for MAX77813EWP45+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77813EWP45+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77813EWP45+T?
MAX77813EWP45+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77813EWP45+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 MAX77813EWP45+T?
For technical support, including MAX77813EWP45+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77813EWP45+T requirements.
6.How does Aetrix verify that MAX77813EWP45+T is sourced from the original manufacturer or authorized distributors?
All MAX77813EWP45+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 MAX77813EWP45+T meets industry standards.
7.What is the process for return or replacement of MAX77813EWP45+T?
All MAX77813EWP45+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77813EWP45+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 MAX77813EWP45+T part is unused and in its original packaging.
Return procedure for MAX77813EWP45+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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