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Analog Devices Inc./Maxim Integrated MAX77813EWP+T
- Part No.:
- MAX77813EWP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX77813EWP+T.pdf
- Description:
- IC REG BUCK BST
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Product details
Overview
MAX77813EWP+T from Analog Devices is a synchronous buck-boost DC-DC converter optimized for single-cell Li+/Li-ion battery systems, delivering regulated output from 2.6V to 5.14V across 2.3V–5.5V input, supporting up to 2A in boost mode and 3A in buck mode with seamless mode transition and 97% peak efficiency.
For engineers reviewing the MAX77813EWP+T datasheet, MAX77813EWP+T pinout, MAX77813EWP+T application, or MAX77813EWP+T equivalent, this device is selected for compact portable power rails requiring dynamic voltage scaling via I²C, high transient response in AR/VR headsets, and robust overvoltage/thermal protection in handheld scanners and mobile payment terminals.
Technical Context
The MAX77813EWP+T implements a fixed 2.5MHz current-mode PWM control scheme with H-bridge topology using a single inductor, enabling three-phase switching (Φ1–Φ3) to support both buck (VIN > VOUT) and boost (VIN < VOUT) operation within one clock cycle. Its dual ILIM-selectable current limits (1.8A/4.5A typ) directly govern maximum output capability per mode.
It integrates dedicated hardware control pins (EN, POK), a 3.4MHz I²C interface compliant with standard/fast/fast-mode-plus/high-speed modes, and programmable slew rates (5–40mV/µs) for controlled VOUT ramp-up/down during dynamic voltage scaling - all while maintaining 55µA quiescent current in SKIP mode and operating from –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.30V to 5.5V - supports full discharge curve of single Li+/Li-ion cells without brownout. |
| VOUT Range | 2.60V to 5.14V in 20mV steps via I²C - enables precise rail tuning for SoCs, displays, and sensors. |
| Output Current | Up to 3A in buck mode (ILIM = high) - sustains high-power processor cores during burst loads. |
| Switching Frequency | 2.5MHz (typ) - allows use of small 1µH inductors and compact ceramic output capacitors. |
| Peak Efficiency | 97% - minimizes thermal stress and extends battery runtime in space-constrained devices. |
| Quiescent Current | 55µA (typ) in SKIP mode - preserves battery life during system sleep or low-activity states. |
| I²C Speed | 3.4MHz high-speed mode - enables rapid register updates for real-time power optimization. |
Pinout & Package
The MAX77813EWP+T is housed in a 20-bump wafer-level package (WLP), measuring 2.13mm × 1.83mm with 0.4mm pitch, optimized for ultra-compact PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply node | Battery or DC source input (2.3V–5.5V); requires 10µF ceramic bypass to PGND. |
| OUT | Regulated output voltage node | Delivers configurable 2.6V–5.14V; requires 47µF ceramic output capacitor for stability. |
| LX1 / LX2 | H-bridge switching nodes | Drive external 1µH inductor; each supports ≤3.2A RMS current and internal clamp diodes to PGND/IN. |
| FB | Output voltage feedback input | Resistor-divider sense point for closed-loop regulation; connects to OUT via precision divider. |
| EN | Active-high enable control | Logic-high (>1.2V) enables converter; includes 800kΩ internal pulldown to AGND. |
| POK | Open-drain power-ok indicator | Asserts high-Z when VOUT ≥80% target; requires external 10kΩ–100kΩ pullup resistor. |
| ILIM | Inductor current limit selection | High = 4.5A typ limit (supports 3A buck / 2A boost); low = 1.8A typ limit (650mA/800mA). |
| SCL / SDA | I²C serial interface lines | Support 3.4MHz high-speed mode; require 1.5kΩ–2.2kΩ pullups to VIO (1.7V–3.6V). |
| VIO | I²C logic supply | Separate 1.7V–3.6V supply for I²C interface; bypassed with 0.1µF capacitor to AGND. |
| VSYS | System voltage reference | Connects to battery anode; used internally for UVLO (2.375V rising threshold) and bias. |
| AGND / PGND | Analog and power ground | Must be connected on PCB; AGND ties to PGND at single point near IC for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost mode transition | Eliminates output glitches during VIN crossing VOUT - critical for uninterrupted SoC operation. |
| Programmable output slew rate | Configurable 5–40mV/µs ramp-up/down prevents inrush-induced system resets during DVS. |
| Dual ILIM-selectable current limits | Hardware-pin selectable (ILIM) enables design flexibility: high-current or low-noise/low-heat configurations. |
| Integrated protection suite | Includes soft-start, thermal shutdown (+165°C), OVP (120% default), and overcurrent hysteresis recovery. |
| SKIP mode with 55µA IQ | Maintains high light-load efficiency without audible switching noise - ideal for always-on sensor rails. |
Applications
| Handheld Scanners | Mobile Payment Terminals |
|---|---|
|
Use Scenario: Compact barcode scanner powered by single Li-ion cell with intermittent high-current laser and imager bursts. IC Role / Device Role / Timing Role: Primary system power regulator delivering stable 3.3V/5V rails to MCU, image sensor, and laser driver. Use Value: Seamless buck-boost operation maintains regulation as battery discharges from 4.2V to 2.8V; 3A buck capability supports 5V laser pulses without rail collapse. |
Use Scenario: EMV-compliant card reader with NFC, secure element, and display - all sharing a single-cell battery. IC Role / Device Role / Timing Role: Dual-rail generator (3.3V for NFC/SE, 5V for display backlight) with I²C-controlled voltage sequencing. Use Value: I²C dynamic voltage scaling reduces power during NFC idle; POK signal synchronizes firmware boot with rail readiness. |
| AR/VR Headsets | Security Cameras (Battery-Powered) |
|
Use Scenario: Wearable mixed-reality headset requiring low-noise, fast-transient power for display drivers and IMU. IC Role / Device Role / Timing Role: High-efficiency intermediate rail generator feeding PMICs and analog front-ends. Use Value: 2.5MHz switching and 50mV line/load transient response (<100µs recovery) prevent display flicker during motion-induced load shifts. |
Use Scenario: Wireless outdoor security camera operating on Li-ion with night-vision IR LEDs and video streaming. IC Role / Device Role / Timing Role: Main system regulator supplying 3.3V to SoC and 5V to IR LED array with thermal-aware current limiting. Use Value: Thermal shutdown (+165°C) and hiccup-mode short-circuit protection ensure reliability in enclosed enclosures under solar heating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63802DLPR | Fixed 3.3V/5V outputs only; no I²C interface; 2.4MHz switching; 2.5A max output. | Lacks dynamic voltage scaling and programmable slew rate - suitable only for static rail designs. | Select when I²C control is unnecessary and board space permits larger 3mm × 2mm QFN package. |
| NCP1529MUTBG | Non-synchronous buck-boost; 2.3V–5.5V input; 2.5V–5.5V output; 1.2A max; no ILIM pin or POK. | No integrated H-bridge MOSFETs - requires external switches; limited current and protection features. | Choose only for cost-sensitive, low-current applications where thermal and overvoltage protection are handled externally. |
Compared with TPS63802DLPR and NCP1529MUTBG, the MAX77813EWP+T uniquely combines I²C-programmable output, dual ILIM selection, integrated POK, and 3A buck capability in a 2.13mm × 1.83mm WLP - making it optimal for next-gen portable devices demanding compactness, intelligence, and robustness.
Availability
MAX77813EWP+T is available at Aetrix Electronics and suitable for handheld scanners, AR/VR headsets, and battery-powered security cameras requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77813EWP+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX77813EWP+T belongs to Analog Devices' Power Management portfolio, designed specifically for space-constrained, battery-operated portable electronics needing intelligent, efficient, and highly integrated DC-DC conversion.
FAQ
What is the recommended input capacitor for MAX77813EWP+T?
The MAX77813EWP+T requires a 10µF X5R/X7R ceramic capacitor at the IN pin, rated for ≥10V, with ≥2µF effective capacitance at operating voltage. This minimizes input ripple, suppresses switching noise, and reduces peak current draw from the Li-ion cell. Larger values improve decoupling but must account for DC bias derating - consult manufacturer datasheets for actual effective capacitance.
Does MAX77813EWP+T support true hardware-based power sequencing?
Yes, the MAX77813EWP+T supports hardware sequencing via its dedicated EN pin and open-drain POK output. EN enables/disables the converter independently of I²C, while POK provides a timing-accurate, voltage-monitored ready signal (asserted at 80% of target VOUT) that can gate downstream regulators or microcontroller reset lines without software intervention.
Can MAX77813EWP+T operate without I²C configuration?
Yes, the MAX77813EWP+T powers up with factory-default VOUT (e.g., 3.3V, 3.4V, or 4.56V depending on order code) and operates immediately upon EN assertion. I²C is optional for dynamic voltage scaling, fault read-back, or fine-tuning parameters like slew rate and OVP threshold - not required for basic regulation.
What is the thermal performance of MAX77813EWP+T on a standard PCB?
On a four-layer board per JEDEC JESD51-7, the MAX77813EWP+T has a junction-to-ambient thermal resistance (θJA) of 55.49°C/W. With 97% peak efficiency and 55µA quiescent current, self-heating remains low under typical loads; thermal shutdown activates at +165°C with +20°C hysteresis, ensuring safe recovery in sustained high-current operation.
How does the ILIM pin affect MAX77813EWP+T's output current capability?
The ILIM pin selects the inductor switching current limit: high = 4.5A typ (enabling up to 3A in buck mode, 2A in boost mode); low = 1.8A typ (enabling up to 800mA buck / 650mA boost). This setting directly determines maximum sustainable output current and influences inductor selection - 7A saturation rating required for ILIM = high, 3.4A for ILIM = low.
MAX77813EWP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down, Step-Up/Step-Down
- Output Configuration:
- -
- Topology:
- Buck, Boost
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX77813EWP+T FAQ
1.How can I place an order for MAX77813EWP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77813EWP+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 MAX77813EWP+T reliable?
The price and inventory of MAX77813EWP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77813EWP+T is usually 5 days.
3.What payment methods are accepted for MAX77813EWP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77813EWP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77813EWP+T?
MAX77813EWP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77813EWP+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 MAX77813EWP+T?
For technical support, including MAX77813EWP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77813EWP+T requirements.
6.How does Aetrix verify that MAX77813EWP+T is sourced from the original manufacturer or authorized distributors?
All MAX77813EWP+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 MAX77813EWP+T meets industry standards.
7.What is the process for return or replacement of MAX77813EWP+T?
All MAX77813EWP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77813EWP+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 MAX77813EWP+T part is unused and in its original packaging.
Return procedure for MAX77813EWP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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