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Analog Devices Inc./Maxim Integrated MAX77816CEWP+T
- Part No.:
- MAX77816CEWP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFBGA, WLBGA
- Datasheet:
-
MAX77816CEWP+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A 20WLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,977
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Product details
Overview
MAX77816CEWP+T from Maxim Integrated is a high-efficiency, 5A-switch buck-boost regulator designed for single-cell Li-ion battery systems requiring seamless voltage regulation across input collapse (2.3V–5.5V) and programmable output (2.60V–5.14V). It delivers up to 3A continuous output at 3.3V with 97.5% peak efficiency, 40µA quiescent current, and I²C-controlled slew-rate adjustment - enabling precise power management in space-constrained mobile SoC rails.
For engineers reviewing the MAX77816CEWP+T datasheet, MAX77816CEWP+T pinout, MAX77816CEWP+T application, or MAX77816CEWP+T equivalent, this page provides verified electrical parameters, validated 20-bump WLP package mapping, confirmed GPIO-configurable functions (output voltage selection), and two production-ready alternative parts with documented functional and application-level distinctions.
Technical Context
The MAX77816CEWP+T implements a four-switch H-bridge topology operating at 2.5MHz fixed-frequency PWM with current-mode control, supporting true buck, boost, and buck-boost modes without mode switching artifacts. Its phase-based switching (Φ1–Φ3) enables continuous conduction across VIN/VOUT crossover points.
It integrates register-programmable ILIM_LXBB (1.15A–5.8A), dual-slew-rate control (5/10 mV/µs down, 20/40 mV/µs up), active discharge (100Ω), and thermal shutdown at +165°C with 20°C hysteresis - all coordinated via an I²C interface that supports dynamic VOUT tuning, status readback, and interrupt reporting through a multifunction GPIO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.3V to 5.5V - supports full Li-ion battery discharge curve (3.0V–4.2V nominal, down to 2.5V cutoff) without rail collapse. |
| VOUT Range | 2.60V to 5.14V in 20mV steps - enables fine-grained SoC core, memory, or RF PA biasing with ±1.0% accuracy in PWM mode. |
| Continuous Output | 3A min @ 3.3V (VIN ≥ 3.0V) - sustains sustained CPU/GPU burst loads without thermal throttling in smartphones and wearables. |
| Peak Switch Current | 5A typ - accommodates transient surges (e.g., 3.6A for 800µs) while maintaining stable regulation during RF transmit events. |
| Efficiency | 97.5% peak - minimizes thermal load in sealed enclosures; 95% typical at 100mA ensures low-power sensor node longevity. |
| I²C Interface | 1MHz max clock, 550pF bus capacitance support - compatible with standard ARM/SoC controllers without level-shifting or timing margin concerns. |
| Quiescent Current | 40µA in SKIP mode - extends standby time in always-on wearable sensors and IoT edge nodes. |
Pinout & Package
MAX77816CEWP+T uses a 20-bump Wafer-Level Package (WLP) measuring 1.827mm × 2.127mm with 0.4mm pitch. The package is optimized for HDI PCBs with µvias and requires strict layout adherence to minimize LX loop inductance and ground impedance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYS | Battery input reference | Connects to Li-ion anode; bypassed with 1µF capacitor to AGND - decouples high-frequency noise from system supply rail. |
| EN | Active-high enable | 800kΩ internal pulldown; asserts internal bias circuitry after 100µs delay - enables controlled power sequencing with host processor. |
| GND | Analog ground | Star-ground point for FB_BB, SDA, SCL; must be low-impedance and isolated from noisy PGND until joined at single point. |
| SDA / SCL | I²C bidirectional data/clock | Open-drain, 1.4V VIH threshold; require external pullups - supports dynamic VOUT reconfiguration and real-time fault monitoring. |
| FB_BB | Output voltage feedback | Resistor-divider input referenced to PGNDBB - sets regulated VOUT with ±1.0% accuracy; sensitive to PCB trace parasitics. |
| LXBB1 / LXBB2 | H-bridge switching nodes | High-di/dt paths; each rated for 4.8A RMS - must route with short, wide traces and multiple vias to PGNDBB to limit EMI and voltage spikes. |
| INBB | Input power path | Bypassed to PGNDBB with 10µF ceramic - filters battery ripple and supplies peak switch current during boost transitions. |
| OUTBB | Regulated output | Delivers final system rail; requires ≥16µF effective capacitance (e.g., 47µF X5R) for stability and <50mV load transient deviation. |
| PGNDBB | Power ground return | Separate star-ground for LX, INBB, OUTBB - prevents switching noise injection into analog/signal paths; joined to GND at single point. |
| GPIO | Configurable I/O | Set by GPIO_CFG[2:0] = 011b for MAX77816C - selects between VOUT and VOUT_H registers on power-up latch, enabling dual-rail boot sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Eliminates output glitches during VIN/VOUT crossover (e.g., 3.4V → 2.9V battery sag), critical for uninterrupted SoC operation in mobile devices. |
| I²C-programmable slew rate | Configurable ramp-up (20/40 mV/µs) and ramp-down (5/10 mV/µs) prevents inrush current damage to downstream capacitors and LDOs. |
| GPIO-configurable output voltage | MAX77816C variant uses GPIO state at soft-start completion to select between two preloaded VOUT registers - enables dual-voltage boot (e.g., 0.8V core + 1.8V I/O). |
| True Shutdown™ | Reduces supply current to 1µA at +25°C - preserves battery charge during deep sleep; resets all registers to POR defaults on disable. |
| Integrated active discharge | 100Ω internal resistor discharges OUTBB when BB_AD = 1 - ensures rapid rail collapse (<10ms) for safe hot-plug or reset sequences. |
Applications
| Smartphones & Tablets | Wearable Devices |
|---|---|
|
Use Scenario: Powering application processors (APUs) and DDR memory rails where battery voltage drops below nominal VOUT during discharge. IC Role / Device Role / Timing Role: Primary system PMIC buck-boost stage delivering stable 3.3V or 2.8V from collapsing 2.8V–4.2V Li-ion source. Use Value: Maintains >3A continuous delivery across full battery range without mode-switching artifacts, enabling consistent APU performance and memory timing compliance. |
Use Scenario: Supplying ultra-low-power microcontrollers and BLE radios in compact hearables with tight thermal budgets. IC Role / Device Role / Timing Role: Efficient intermediate rail generator converting 3.6V battery to 1.8V logic rail with minimal quiescent draw. Use Value: 40µA IQ in SKIP mode extends battery life beyond 7 days in always-on sensing mode; 97.5% peak efficiency avoids thermal derating in sealed enclosures. |
| RF Power Amplifiers | Battery-Powered Industrial Sensors |
|
Use Scenario: Biasing GaAs/GaN RF PAs requiring dynamically adjustable VPA (e.g., 3.0V–4.5V) to optimize linearity vs. efficiency trade-offs. IC Role / Device Role / Timing Role: Programmable PA supply rail with I²C-controlled VOUT and fast load transient response (<50mV deviation). Use Value: 2.5MHz switching and 3.6A burst capability meet PA envelope tracking demands; GPIO-configured VOUT allows per-band PA voltage selection. |
Use Scenario: Powering LoRaWAN or NB-IoT sensor nodes deployed in remote locations with 10-year battery life targets. IC Role / Device Role / Timing Role: Primary energy-harvesting interface regulator accepting variable input (2.5V–5.0V) and delivering stable 3.3V system rail. Use Value: 2.3V minimum VIN enables operation down to near-dead battery; True Shutdown™ reduces leakage to 1µA, maximizing shelf life and field longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Fixed 3.3V/5.0V outputs only; no I²C interface; 3.2A max continuous; 2.5MHz switching; 96% peak efficiency. | Lacks dynamic VOUT tuning and GPIO configuration - suitable for cost-sensitive, fixed-rail designs without firmware control. | Select when I²C control and multi-voltage flexibility are unnecessary; verify thermal design for 3.2A continuous under worst-case ambient. |
| NCP1529MUTBG | Single-output buck-boost; 2.5A max; 1.5MHz switching; 94% peak efficiency; no GPIO or slew-rate control; 2.7V–5.5V VIN. | Lower current and efficiency; no programmable features - fits simpler portable accessories with static rail requirements. | Choose for entry-level wearables or Bluetooth headsets where 2.5A suffices and BOM cost is prioritized over feature set. |
Compared with TPS63020DSJR and NCP1529MUTBG, the MAX77816CEWP+T uniquely combines I²C programmability, GPIO-configurable functions, and 3A+ continuous delivery in a 1.83mm × 2.13mm WLP - making it the only option for space-constrained, firmware-managed multi-rail systems requiring seamless buck-boost transitions.
Availability
MAX77816CEWP+T is available at Aetrix Electronics and suitable for smartphones, wearables, and RF power amplifier designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX77816CEWP+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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and consumer applications.
The MAX77816 series targets high-density portable electronics requiring seamless buck-boost conversion with firmware configurability - specifically engineered for Li-ion-powered SoC platforms needing dynamic voltage scaling and minimal footprint.
FAQ
What is the default output voltage setting for MAX77816CEWP+T?
The MAX77816CEWP+T is the MAX77816C variant, which defaults to VOUT[6:0] = 0x23 (3.3V) when GPIO is low at power-up. Its GPIO pin is configured for output voltage selection, allowing dynamic switching between two preloaded voltage registers based on GPIO state after soft-start completion. This behavior is confirmed in the device's GPIO_CFG[2:0] = 011b configuration and is distinct from MAX77816A (3.4V default) or MAX77816B (ILIM selection).
Does MAX77816CEWP+T support true shutdown with register retention?
Yes, MAX77816CEWP+T implements True Shutdown™: when EN is pulled low, supply current drops to 1µA at +25°C and all type-O registers reset to their power-on-reset (POR) defaults. Unlike standard shutdown modes, this guarantees deterministic startup behavior and eliminates need for host firmware reinitialization after wake-up - a key reliability feature for battery-critical applications like medical wearables.
What is the maximum supported I²C clock frequency for MAX77816CEWP+T?
The MAX77816CEWP+T supports I²C clock frequencies up to 1MHz, with timing parameters fully characterized for tLOW ≥ 0.5µs, tHIGH ≥ 0.26µs, and bus capacitance up to 550pF. This allows direct interfacing with modern application processors (e.g., Qualcomm Snapdragon, MediaTek Dimensity) without external clock dividers or level shifters - verified in the Electrical Characteristics table on page 4 of the official datasheet.
How does the GPIO pin function in MAX77816CEWP+T?
In MAX77816CEWP+T (C variant), the GPIO pin is configured as output voltage selector: its logic state at the end of soft-start determines whether VOUT[6:0] or VOUT_H[6:0] is applied to the FB_BB feedback network. This enables dual-rail boot sequences (e.g., 0.8V core + 1.8V I/O) without additional control lines - a function distinct from FPWM enable (A/F), ILIM selection (B), or POK indication (D) in other MAX77816 variants.
What is the minimum effective output capacitance required for stable operation of MAX77816CEWP+T?
MAX77816CEWP+T requires a minimum effective output capacitance of 16µF, as specified in the Electrical Characteristics table (CEFF(MIN)). Due to DC bias derating of ceramic capacitors, a 47µF, 6.3V X5R/X7R capacitor is recommended - validated in typical application circuits and thermal performance testing to ensure <50mV load transient deviation and loop stability across -40°C to +85°C.
MAX77816CEWP+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:
- Adjustable
- 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:
- 5A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLP (1.83x2.13)
MAX77816CEWP+T FAQ
1.How can I place an order for MAX77816CEWP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77816CEWP+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 MAX77816CEWP+T reliable?
The price and inventory of MAX77816CEWP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77816CEWP+T is usually 5 days.
3.What payment methods are accepted for MAX77816CEWP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77816CEWP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77816CEWP+T?
MAX77816CEWP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77816CEWP+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 MAX77816CEWP+T?
For technical support, including MAX77816CEWP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77816CEWP+T requirements.
6.How does Aetrix verify that MAX77816CEWP+T is sourced from the original manufacturer or authorized distributors?
All MAX77816CEWP+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 MAX77816CEWP+T meets industry standards.
7.What is the process for return or replacement of MAX77816CEWP+T?
All MAX77816CEWP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77816CEWP+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 MAX77816CEWP+T part is unused and in its original packaging.
Return procedure for MAX77816CEWP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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