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Analog Devices Inc./Maxim Integrated MAX77813EWP45+
- Part No.:
- MAX77813EWP45+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFBGA, WLBGA
- Datasheet:
-
MAX77813EWP45+.pdf
- Description:
- IC REG BUCK BOOST PROG 3A 20WLP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX77813EWP45+ from Analog Devices is a synchronous buck-boost DC-DC converter optimized for single-cell Li+/Li-ion battery systems, delivering regulated 2.6V–5.14V output across 2.3V–5.5V input, supporting up to 2A in boost mode and 3A in buck mode with 97% peak efficiency and 2.5MHz switching frequency. It enables seamless mode transition in handheld scanners, mobile payment terminals, and AR/VR headsets.
For engineers reviewing the MAX77813EWP45+ datasheet, MAX77813EWP45+ pinout, MAX77813EWP45+ application, or MAX77813EWP45+ equivalent, key selection criteria include I²C-programmable VOUT (20mV steps), dual ILIM-selectable current limits (1.8A/4.5A), integrated power-OK monitoring, and 20-bump WLP package compatibility with space-constrained portable designs.
Technical Context
The MAX77813EWP45+ implements a fixed-frequency (2.5MHz) current-mode PWM control scheme with H-bridge topology using a single inductor and output capacitor, enabling three-phase switching (Φ1–Φ3) to dynamically allocate energy storage and transfer based on VIN–VOUT differential. Its seamless buck-to-boost transition avoids output droop during input voltage crossing.
Control logic integrates dedicated hardware pins (EN, ILIM, POK) alongside a 3.4MHz I²C interface supporting standard/fast/fast-mode-plus protocols, allowing dynamic voltage scaling, fault read-back, and register-level configuration of slew rate (20/40 mV/µs ramp-up, 5/10 mV/µs ramp-down), OVP threshold (120% default), and thermal shutdown (165°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.30V–5.50V: Supports full discharge curve of single Li+/Li-ion cells without dropout. |
| VOUT Range | 2.60V–5.14V in 20mV steps via I²C: Enables precise rail matching for USB PD, display bias, or SoC core voltages. |
| Output Current | Up to 3A in buck mode (ILIM = high): Sustains high-power processor bursts without external LDO support. |
| Switching Frequency | 2.5MHz ±10%: Allows use of compact 1µH inductors and minimizes EMI in noise-sensitive RF sections. |
| Quiescent Current | 55µA typical in SKIP mode: Extends battery runtime in always-on sensor or low-power standby states. |
| Efficiency | 97% peak at 100mA load: Reduces thermal load in sealed enclosures like security cameras or wearables. |
| Thermal Shutdown | +165°C with +20°C hysteresis: Prevents permanent damage during sustained overload or poor PCB heat sinking. |
Pinout & Package
The MAX77813EWP45+ uses a 20-bump wafer-level package (WLP), measuring 2.13mm × 1.83mm with 0.4mm pitch, designed for ultra-compact portable electronics requiring minimal board area and low profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSYS | System (battery) voltage input | Bypassed to AGND with 1µF capacitor; accepts full Li+ cell range (2.3V–5.5V) with UVLO at 2.5V (rising). |
| ILIM | Inductor current limit selection | Logic-high sets 4.5A typ inductor limit (supports 3A buck / 2A boost); logic-low sets 1.8A (650mA/800mA). |
| FB | Output voltage feedback sense | Resistor-divider input referenced to AGND; sets regulation point for I²C-programmed VOUT. |
| POK | Open-drain power-OK output | Asserts high-Z when VOUT ≥ 80% target; pulls low at <75% or during disable-requires external 10kΩ–100kΩ pullup. |
| EN | Active-high enable input | Internal 800kΩ pulldown ensures safe default-off state; VIH = 1.2V min at -40°C. |
| LX1 / LX2 | H-bridge switching nodes | Drive external 1µH inductor; each supports 3.2A RMS continuous current with internal clamp diodes to PGND/IN. |
| IN / OUT | Input and output power terminals | IN bypassed with 10µF ceramic; OUT bypassed with 47µF ceramic-critical for stability and ripple suppression. |
| PGND / AGND | Power and analog ground | Must be connected on PCB per layout guidelines; PGND carries high di/dt return currents; AGND references sensitive analog blocks. |
| SCL / SDA / VIO | I²C interface and supply | VIO powers I²C logic (1.7V–3.6V); SCL/SDA require 1.5kΩ–2.2kΩ pullups to VIO; support 3.4MHz high-speed mode. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Eliminates output glitches during VIN crossing VOUT-critical for uninterrupted operation in battery-fueled AR/VR displays. |
| SKIP mode with 55µA IQ | Maintains >85% efficiency down to 100µA load, extending usable battery capacity in intermittent-sensing applications. |
| Dual ILIM-selectable current limits | Hardware-configurable peak inductor current (1.8A/4.5A) enables one BOM to serve both low-power peripherals and high-current processors. |
| Integrated protection suite | Soft-start (120µs), overvoltage (120% default), overcurrent, and thermal shutdown (165°C) reduce need for external fault management circuitry. |
| I²C programmable slew rate | Configurable VOUT ramp-up (20/40 mV/µs) and ramp-down (5/10 mV/µs) prevents inrush into downstream capacitive loads like touch controllers. |
Applications
| Handheld Scanners | Mobile Payment Terminals |
|---|---|
Use Scenario: Battery-powered barcode scanner operating across 3.0V–4.2V Li-ion voltage range while powering laser diode, CMOS imager, and BLE radio. IC Role / Device Role / Timing Role: Primary system power regulator delivering stable 3.3V to digital logic and 5.0V to laser driver with fast transient response to imaging bursts. Use Value: Seamless buck-boost mode transition prevents image corruption during battery discharge; 2.5MHz switching allows small 1µH inductor to fit within slim form factor. | Use Scenario: EMV-compliant card reader with NFC, secure element, and display, powered by single Li-ion cell. IC Role / Device Role / Timing Role: Single-chip power solution generating 1.8V for NFC controller, 3.3V for MCU, and 5.0V for display backlight-all from one inductor. Use Value: I²C dynamic voltage scaling reduces active power during NFC polling; POK signal validates rail integrity before secure transaction initiation. |
| Security Cameras | AR/VR Headsets |
Use Scenario: Compact indoor security camera with IR illumination, motion detection, and Wi-Fi streaming, running 24/7 on rechargeable Li-ion pack. IC Role / Device Role / Timing Role: High-efficiency buck-boost supplying 3.3V to SoC and 5.0V to IR LEDs, with thermal shutdown protecting against enclosure overheating. Use Value: 97% peak efficiency minimizes self-heating in sealed housing; 55µA quiescent current extends battery life in motion-triggered wake/sleep cycles. | Use Scenario: Wireless standalone AR glasses requiring low-latency display, eye-tracking sensors, and spatial audio-all powered by embedded battery. IC Role / Device Role / Timing Role: Core power manager delivering tightly regulated 1.1V (GPU), 1.8V (ISP), and 3.3V (sensors) rails with sub-50mV load transient response. Use Value: Burst mode increases inductor current limit during GPU frame rendering spikes, preventing VOUT sag that would cause display flicker or tracking loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63802DLCT | Fixed 3.3V/5.0V outputs only; no I²C programmability; 2.4MHz switching; 2.5A max output. | Lacks dynamic voltage scaling and fine-grained VOUT control-suitable only for static-rail systems. | Select when design requires lowest BOM cost and no firmware-based rail tuning. |
| NCP1529MUTBG | Non-synchronous buck-boost; 1.2MHz switching; 1.5A max output; no I²C; no POK output. | Lower efficiency (≤92%), higher quiescent current (120µA), and no fault reporting-limits use in battery-critical devices. | Select only for cost-sensitive, non-portable applications where size and efficiency are secondary. |
Compared with TPS63802DLCT and NCP1529MUTBG, the MAX77813EWP45+ uniquely combines I²C-programmable VOUT (20mV steps), dual ILIM configuration, integrated POK, and 97% efficiency in a 2.13mm × 1.83mm WLP-making it the only option for space-constrained, firmware-adaptive, multi-rail portable systems.
Availability
MAX77813EWP45+ is available at Aetrix Electronics and suitable for handheld scanners, mobile payment terminals, and AR/VR headsets requiring stable component supply across long production lifecycles and varying battery chemistries.
Supply support for MAX77813EWP45+ 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, headquartered in Wilmington, MA.
The MAX77813EWP45+ belongs to Analog Devices' Power Management portfolio, engineered specifically for ultra-compact, high-efficiency power conversion in battery-powered portable electronics with stringent size, efficiency, and firmware-control requirements.
FAQ
What is the factory-default output voltage for MAX77813EWP45+?
The MAX77813EWP45+ has a factory-default startup output voltage of 3.3V, which is one of three standard options (3.3V, 3.4V, 4.56V) defined in the Ordering Information table. This default value can be overwritten via I²C register writes to VOUT[6:0] during operation, and persists until reset or power cycle unless stored in nonvolatile memory through external host firmware.
Does MAX77813EWP45+ support true I²C high-speed mode?
Yes, the MAX77813EWP45+ supports I²C high-speed mode up to 3.4MHz with CB ≤ 100pF, meeting JEDEC HS-mode timing specifications including tSU_STA (160ns), tHD_STA (160ns), and tRCL (10–40ns). For bus capacitances up to 400pF, it operates at 1.7MHz-ensuring robust communication in dense PCB layouts with multiple I²C peripherals sharing the same bus.
How does the ILIM pin affect maximum output current in MAX77813EWP45+?
The ILIM pin directly selects the inductor switching current limit: logic-high sets 4.5A (typ), enabling up to 3A output in buck mode and 2A in boost mode; logic-low sets 1.8A (typ), limiting output to 800mA (buck) and 650mA (boost). This hardware-selectable limit allows one MAX77813EWP45+ design to serve both low-power peripherals and high-current subsystems without changing firmware or layout.
What is the minimum effective output capacitance required for stable operation of MAX77813EWP45+?
The MAX77813EWP45+ requires a minimum effective output capacitance (CEFF(MIN)) of 16µF across the full load range (0A–2A). Due to DC bias derating of ceramic capacitors, a 47µF/10V X5R/X7R device is recommended to ensure ≥16µF remains effective at the target VOUT-critical for maintaining loop stability and limiting output ripple to <20mV under transient loads.
Can MAX77813EWP45+ operate without an external inductor?
No, the MAX77813EWP45+ requires an external 1µH inductor connected between LX1 and LX2 pins. The H-bridge topology relies on this inductor for energy storage and transfer during all three switching phases (Φ1–Φ3). Omitting the inductor or substituting with a ferrite bead or resistor will prevent regulation and likely cause immediate device failure due to uncontrolled current flow through internal switches.
MAX77813EWP45+ 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+ FAQ
1.How can I place an order for MAX77813EWP45+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77813EWP45+ 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+ reliable?
The price and inventory of MAX77813EWP45+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77813EWP45+ is usually 5 days.
3.What payment methods are accepted for MAX77813EWP45+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77813EWP45+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77813EWP45+?
MAX77813EWP45+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77813EWP45+ 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+?
For technical support, including MAX77813EWP45+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77813EWP45+ requirements.
6.How does Aetrix verify that MAX77813EWP45+ is sourced from the original manufacturer or authorized distributors?
All MAX77813EWP45+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX77813EWP45+?
All MAX77813EWP45+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77813EWP45+, 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+ part is unused and in its original packaging.
Return procedure for MAX77813EWP45+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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