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Analog Devices Inc./Maxim Integrated MAX77813EWP33+
- Part No.:
- MAX77813EWP33+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFBGA, WLBGA
- Datasheet:
-
MAX77813EWP33+.pdf
- Description:
- IC REG BUCK BOOST PROG 2A 20WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,842
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Product details
Overview
MAX77813EWP33+ from Analog Devices is a synchronous buck-boost DC-DC converter optimized for single-cell Li+/Li-ion battery systems, delivering regulated 3.3V output across 2.3V–5.5V input, supporting up to 3A in buck mode and 2A in boost mode with 97% peak efficiency and 2.5MHz switching frequency.
For engineers reviewing the MAX77813EWP33+ datasheet, MAX77813EWP33+ pinout, MAX77813EWP33+ application, or MAX77813EWP33+ equivalent, key selection criteria include I²C-programmable VOUT (2.6V–5.14V), dual inductor current limit selection (ILIM pin), Power-OK monitoring, and 20-bump WLP package compatibility with space-constrained portable electronics.
Technical Context
The MAX77813EWP33+ implements a fixed-frequency (2.5MHz) current-mode H-bridge buck-boost topology with three-phase switching (Φ1–Φ3) enabling seamless VIN-to-VOUT transitions-boost operation uses Φ1/Φ2 when VIN < VOUT; buck uses Φ2/Φ3 when VIN > VOUT. It integrates high-side PMOS (40mΩ) and low-side NMOS (55mΩ) switches.
Control is supported via dedicated hardware pins (EN, ILIM, POK, FB) and an optional 3.4MHz I²C interface (7-bit address 0x18) for dynamic voltage scaling, fault read-back, and register-based slew rate control (20/40mV/µs ramp-up; 5/10mV/µs ramp-down). Soft-start (120µs) and burst-mode transient response further enhance system stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.3V–5.5V: supports full discharge curve of single Li+/Li-ion cell without brownout. |
| VOUT Range | 2.6V–5.14V in 20mV steps via I²C: enables precise rail matching for SoCs, sensors, and RF modules. |
| Output Current | Up to 3A (buck) / 2A (boost) at ILIM = high: sufficient for high-power peripherals in handheld scanners and AR/VR headsets. |
| Switching Frequency | 2.5MHz (typ): allows use of compact 1µH inductor and minimizes EMI filtering requirements. |
| Peak Efficiency | 97%: reduces thermal load in sealed enclosures and extends battery runtime under medium loads. |
| Quiescent Current | 55µA (typ) in SKIP mode: critical for always-on subsystems in security cameras and mobile payment terminals. |
| I²C Speed | 3.4MHz high-speed mode: enables rapid dynamic voltage scaling during processor DVFS transitions. |
Pinout & Package
MAX77813EWP33+ is housed in a 20-bump wafer-level package (WLP), measuring 2.13mm × 1.83mm with 0.4mm pitch. The bump layout follows a 5×4 grid (A1–D5), with power, analog, and digital functions distributed to minimize coupling and support optimal PCB thermal and grounding design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN, OUT | Power input/output nodes | High-current paths requiring wide copper pours and separate PGND stitching; IN bypassed with 10µF, OUT with 47µF ceramic. |
| LX1, LX2 | H-bridge switching nodes | Connect to opposite ends of single 1µH inductor; require tight loop area and no vias to minimize EMI and voltage spikes. |
| VSYS, AGND, PGND | System supply and ground references | VSYS ties directly to battery; AGND and PGND must be joined at single point near IC to avoid noise coupling into FB path. |
| FB, POK, EN, ILIM | Analog feedback and control inputs | FB sets regulation point via resistor divider; POK provides open-drain status flag; EN has internal 800kΩ pulldown; ILIM selects current limit (high/low). |
| SDA, SCL, VIO | I²C interface and logic supply | VIO powers I/O buffers (1.7–3.6V); SDA/SCL require external 1.5–2.2kΩ pullups to VIO; all are high-impedance when disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Eliminates output glitches during VIN crossing VOUT-critical for uninterrupted operation in battery-powered AR/VR displays. |
| I²C programmable slew rate | Configurable VOUT ramp-up (20/40mV/µs) and ramp-down (5/10mV/µs) prevents inrush stress on downstream capacitive loads. |
| Dual ILIM current limit selection | Hardware-selectable 4.5A/1.8A inductor current limits enable one BOM to support both high-power (3A buck) and low-power (800mA buck) variants. |
| Active discharge resistance | 100Ω internal discharge path safely collapses VOUT after shutdown-avoids floating rails that could damage connected logic. |
| Thermal shutdown with hysteresis | +165°C trip with +20°C hysteresis ensures reliable recovery without oscillation in thermally constrained handheld enclosures. |
Applications
| Handheld Scanners | Mobile Payment Terminals |
|---|---|
Use Scenario: Continuous barcode scanning with intermittent laser activation and Bluetooth data transmission. IC Role / Device Role / Timing Role: Primary system power regulator supplying 3.3V to MCU, imager, and BLE SoC from a 3.6V nominal Li-ion cell. Use Value: Seamless buck-boost operation maintains stable 3.3V rail as battery discharges from 4.2V to 2.8V, preventing scanner timeout or decode failure. | Use Scenario: EMV-compliant card reading with NFC, secure element, and display backlight-all powered from compact coin-cell or slim Li-ion. IC Role / Device Role / Timing Role: Single-chip power solution delivering 3.3V/5V rails with I²C-controlled voltage scaling for dynamic power management. Use Value: 55µA quiescent current in SKIP mode extends standby time; POK signal synchronizes secure boot sequence with rail readiness. |
| Security Cameras | AR/VR Headsets |
Use Scenario: Always-on motion-triggered video capture with IR illumination and Wi-Fi upload in battery-operated indoor/outdoor units. IC Role / Device Role / Timing Role: High-efficiency buck-boost supplying 3.3V to image sensor and 5V to IR LEDs, with thermal-aware load shedding. Use Value: 97% peak efficiency minimizes self-heating in sealed housings; thermal shutdown protects silicon image sensor from ambient + camera self-heat. | Use Scenario: Low-latency display driving and IMU processing in untethered headsets where weight and thermal envelope are tightly constrained. IC Role / Device Role / Timing Role: Core power IC delivering dynamically scaled 2.8V/3.3V/5V rails to display driver, GPU, and wireless transceiver. Use Value: 2.5MHz switching enables ultra-small 1µH inductor; I²C slew rate control prevents display flicker during GPU voltage transitions. |
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 output (non-I²C); 2.5A max output; 2.4MHz switching; no POK or ILIM pin. | Suitable for cost-sensitive designs where dynamic voltage scaling and rail monitoring are unnecessary. | Select when firmware control of VOUT or Power-OK signaling is not required and board space allows slightly larger QFN package. |
| RTQ2134BGQW | I²C-programmable (2.5–5.5V); 3A output; 2.2MHz; includes enable, POK, and thermal warning-but no ILIM pin or burst mode. | Better for industrial IoT gateways needing wider VOUT range and thermal alert, but less responsive to fast load transients than MAX77813EWP33+. | Prefer when extended VOUT flexibility and integrated thermal warning outweigh need for burst-mode transient enhancement. |
Compared with TPS63802DLAR and RTQ2134BGQW, the MAX77813EWP33+ uniquely combines I²C-slew control, hardware ILIM selection, and burst-mode transient response-making it optimal for portable devices demanding both precision rail agility and robustness against sudden load changes.
Availability
MAX77813EWP33+ is available at Aetrix Electronics and suitable for handheld scanners, mobile payment terminals, and AR/VR headsets requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77813EWP33+ 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, communications, and power management markets.
The MAX77813EWP33+ belongs to Analog Devices' MAX® power management portfolio, engineered specifically for space- and efficiency-critical portable electronics powered by single-cell batteries.
FAQ
What is the factory-default output voltage for MAX77813EWP33+?
The MAX77813EWP33+ is ordered with a factory-programmed default VOUT of 3.3V, confirmed by the "EWP33" suffix in the part number. This value is stored in the VOUT[6:0] register at power-up and can be overwritten via I²C. The device supports I²C reprogramming to any value between 2.60V and 5.14V in 20mV increments, and the new setting persists until reset or power cycle.
Does MAX77813EWP33+ support true I²C high-speed mode?
Yes, the MAX77813EWP33+ fully supports I²C high-speed mode up to 3.4MHz with guaranteed timing (tSU_STA ≤ 160ns, tHD_STA ≤ 160ns) when bus capacitance is ≤100pF. It also operates reliably at 1.7MHz with up to 400pF capacitance. The interface requires external pullups to VIO (1.5–2.2kΩ), and VIO must be within 1.7–3.6V. All registers remain accessible in high-speed mode without functional limitation.
How does the ILIM pin affect maximum output current in MAX77813EWP33+?
The ILIM pin on the MAX77813EWP33+ selects between two inductor current limits: pulling ILIM high sets 4.5A (typ), enabling up to 3A output in buck mode and 2A in boost mode; pulling ILIM low sets 1.8A (typ), limiting output to ~800mA (buck) and ~650mA (boost). This hardware-selectable feature allows one PCB layout to support multiple power tiers without firmware changes or BOM variants.
What protection features are integrated into MAX77813EWP33+?
The MAX77813EWP33+ integrates soft-start, thermal shutdown (+165°C trip with +20°C hysteresis), output overvoltage protection (OVP, default 120% of VOUT), and cycle-by-cycle overcurrent protection. It also includes active discharge (100Ω) to safely collapse VOUT after shutdown and a Power-OK (POK) output that asserts high when VOUT reaches 80% of target. All protections are hardware-based and operate independently of I²C communication.
Can MAX77813EWP33+ operate without I²C connectivity?
Yes, the MAX77813EWP33+ functions fully as a standalone buck-boost converter without I²C. Its factory-default VOUT (3.3V), switching frequency (2.5MHz), and protection features operate autonomously. I²C is optional-used only for dynamic voltage scaling, fault read-back, or configuring slew rates and OVP thresholds. SDA and SCL pins may be tied to AGND if unused, and VIO can be grounded to disable the interface entirely.
MAX77813EWP33+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Down, 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:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLP (1.83x2.13)
MAX77813EWP33+ FAQ
1.How can I place an order for MAX77813EWP33+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77813EWP33+ 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 MAX77813EWP33+ reliable?
The price and inventory of MAX77813EWP33+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77813EWP33+ is usually 5 days.
3.What payment methods are accepted for MAX77813EWP33+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77813EWP33+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77813EWP33+?
MAX77813EWP33+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77813EWP33+ 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 MAX77813EWP33+?
For technical support, including MAX77813EWP33+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77813EWP33+ requirements.
6.How does Aetrix verify that MAX77813EWP33+ is sourced from the original manufacturer or authorized distributors?
All MAX77813EWP33+ 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 MAX77813EWP33+ meets industry standards.
7.What is the process for return or replacement of MAX77813EWP33+?
All MAX77813EWP33+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77813EWP33+, 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 MAX77813EWP33+ part is unused and in its original packaging.
Return procedure for MAX77813EWP33+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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