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Analog Devices Inc./Maxim Integrated MAX77816AEWP+T
- Part No.:
- MAX77816AEWP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFBGA, WLBGA
- Datasheet:
-
MAX77816AEWP+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A 20WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,663
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Product details
Overview
The MAX77816AEWP+T from Maxim Integrated is a high-efficiency, 5A-switch buck-boost regulator for single-cell Li-ion battery systems. It delivers 2.60V–5.14V programmable output voltage in 20mV steps, supports 3A continuous output (≥3.0V input), achieves 97.5% peak efficiency, and features I²C-controlled dynamic voltage scaling-enabling precise power management in compact mobile devices.
For engineers reviewing the MAX77816AEWP+T datasheet, MAX77816AEWP+T pinout, MAX77816AEWP+T application, or MAX77816AEWP+T equivalent, key selection criteria include seamless buck/boost transition behavior, GPIO-configurable functions (FPWM enable on this variant), 2.5MHz fixed-frequency operation, thermal shutdown at +165°C, and WLP-20 package compatibility with high-density PCB layouts.
Technical Context
The MAX77816AEWP+T implements a four-switch H-bridge topology operating in synchronous buck, buck-boost, and boost modes with automatic mode transition. Its current-mode PWM control runs at 2.5MHz (typ), enabling small 1µH inductors and low-output-ripple operation.
It integrates dual LX switching nodes (LXBB1/LXBB2), a register-programmable GPIO (configured as FPWM enable per MAX77816A spec), soft-start (120µs typ), true shutdown™, and comprehensive protection including overcurrent (ILIM_LXBB = 4–5.8A), thermal shutdown (+165°C), and short-circuit detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.3V to 5.5V - supports full Li-ion battery discharge curve (3.0V–4.4V) plus system rail variations. |
| VOUT Range | 2.60V to 5.14V in 20mV steps - enables fine-grained core voltage tuning for AP/SoC DVFS. |
| Continuous IOUT | 3A min @ VIN ≥3.0V, VOUT=3.3V - sustains sustained processor loads without derating. |
| Peak Switch Current | 5A typ - accommodates burst-mode CPU/GPU activity without cycle skipping or dropout. |
| Efficiency | 97.5% peak - minimizes thermal load and extends battery runtime in portable designs. |
| I2C Interface | Standard-mode (1MHz max) - allows real-time VOUT adjustment, status polling, and fault reporting. |
| Quiescent Current | 40µA in SKIP mode - preserves battery life during system idle/suspend states. |
Pinout & Package
Package: 20-bump Wafer-Level Package (WLP), 2.127mm × 1.827mm, 0.4mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYS | Battery/system supply input | Provides bias for internal LDOs; bypassed with 1µF capacitor to GND for noise suppression. |
| EN | Active-high enable input | 800kΩ internal pulldown; asserts internal bias circuitry after 100µs delay before register access. |
| GND | Signal ground reference | Star-ground connection point; separates analog/digital return paths from PGNDBB. |
| SDA / SCL | I²C bidirectional data/clock | Hi-Z in OFF state; require external pullups; support register read/write and interrupt signaling. |
| FB_BB | Output voltage feedback | Monitors regulated VOUT via resistor divider; sets output accuracy to ±1.0% in PWM mode. |
| LXBB1 / LXBB2 | H-bridge switch node outputs | Drive external 1µH inductor; each rated for 4.8A RMS continuous current and ±2.4V to 8.0V pulsed swing. |
| INBB | Buck-boost input rail | Bypassed to PGNDBB with 10µF ceramic capacitor to suppress high-frequency switching noise. |
| OUTBB | Regulated output rail | Delivers up to 3A; requires ≥16µF effective capacitance (e.g., 47µF X5R) for loop stability. |
| PGNDBB | Power ground return | Low-impedance return path for LX currents; must be star-connected to minimize ground bounce. |
| GPIO | Multifunction pin (MAX77816A) | Configured as FPWM enable: pulled low for SKIP mode (high light-load efficiency); pulled high for forced PWM (low ripple). |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck/boost transition | Eliminates output glitches during VIN crossing VOUT - critical for uninterrupted SoC operation across battery discharge. |
| Programmable slew-rate control | Ramp-up (20/40mV/µs) and ramp-down (5/10mV/µs) prevent inrush current and system-level brownouts during VOUT changes. |
| True Shutdown™ | Reduces supply current to ≤1µA while retaining register state - enables fast wake-up without reconfiguration. |
| Integrated active discharge | 100Ω internal resistor discharges VOUT when disabled - prevents unsafe residual voltage on powered-down rails. |
| Thermal & overcurrent protection | +165°C shutdown with 20°C hysteresis and 3ms OCP latch-off - protects IC and PCB under fault conditions. |
Applications
| Smartphones | Wearable Devices |
|---|---|
Use Scenario: Powering application processors and RF transceivers from a single Li-ion cell across full 3.0V–4.4V voltage range. IC Role / Device Role / Timing Role: Primary system PMIC buck-boost regulator delivering stable 3.3V/3.8V rails with sub-50mV transient deviation. Use Value: Enables seamless voltage regulation without mode-switching artifacts during battery discharge, preserving modem and camera functionality. | Use Scenario: Supplying ultra-low-power microcontrollers and sensors in compact hearables or fitness bands. IC Role / Device Role / Timing Role: High-efficiency power source supporting 10mA–1.5A dynamic load profiles with 40µA quiescent current. Use Value: Extends battery life by >20% versus conventional buck-only solutions when VBAT drops below target VOUT. |
| Wireless Communication Modules | RF Power Amplifiers |
Use Scenario: Providing clean, dynamically adjustable VPA and VRFIC supplies in LTE/Wi-Fi modules. IC Role / Device Role / Timing Role: I²C-programmable voltage source with <100µs response to AP commands for PA bias optimization. Use Value: Allows real-time PA efficiency tuning across frequency bands, reducing EVM degradation and improving Tx linearity. | Use Scenario: Delivering tightly regulated 3.3V–5.0V to GaAs/GaN RF power amplifiers in portable base stations. IC Role / Device Role / Timing Role: High-current buck-boost stage with 5A peak switch capability and <50mV load transient response. Use Value: Maintains PA gain flatness and output power consistency despite rapid battery voltage sag during high-Power Tx bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63802DLAR | 4A continuous output, 2.5V–5.5V VOUT, no I²C interface, fixed 3.3V/5.0V options only | Lacks dynamic voltage scaling; suited for fixed-rail systems without AP coordination | Select when I²C control is unnecessary and cost sensitivity outweighs programmability needs. |
| NCP1532MUTBG | 3A continuous, 2.5V–5.5V VOUT, I²C-compatible but no GPIO configuration; lower peak efficiency (95%) | Missing multifunction GPIO and seamless transition logic; less suitable for aggressive DVFS schemes | Choose for simpler designs where FPWM enable or burst-current headroom are not required. |
Compared with TPS63802DLAR and NCP1532MUTBG, the MAX77816AEWP+T uniquely combines I²C-programmable VOUT, GPIO-configurable FPWM mode, and true seamless buck/boost transition - making it optimal for advanced mobile SoC power architectures requiring both precision control and robust transient performance.
Availability
MAX77816AEWP+T is available at Aetrix Electronics and suitable for smartphones, wearable devices, and wireless communication modules requiring stable component supply, long-term lifecycle support, and traceable sourcing for volume production.
Supply support for MAX77816AEWP+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 MAX77816AEWP+T belongs to Maxim's high-efficiency PMIC family targeting space-constrained, battery-powered mobile platforms - engineered to deliver seamless voltage regulation across the entire Li-ion voltage range with minimal footprint and thermal impact.
FAQ
What is the default output voltage of the MAX77816AEWP+T?
The MAX77816AEWP+T has a factory-default output voltage of 3.4V, set by VOUT[6:0] = 0x28. This value is programmable via I²C to any level between 2.60V and 5.14V in 20mV increments. The default is retained after power-on reset unless modified by host firmware, and remains stable across temperature and load variations within ±1.0% accuracy in PWM mode.
How does the GPIO pin function on the MAX77816AEWP+T?
On the MAX77816AEWP+T, the GPIO pin is configured as FPWM Mode Enable per the MAX77816A variant specification. When pulled low (≤0.4V), the device operates in SKIP mode for maximum light-load efficiency. When pulled high (≥1.2V), it forces fixed-frequency PWM operation to minimize output ripple - a critical feature for noise-sensitive RF and audio subsystems powered by the MAX77816AEWP+T.
What is the minimum output capacitance required for stable operation of the MAX77816AEWP+T?
The MAX77816AEWP+T requires a minimum effective output capacitance of 16µF, as specified in the Electrical Characteristics table. Due to DC bias derating of ceramic capacitors, a 47µF, 6.3V X5R/X7R capacitor is recommended for most applications. This ensures loop stability, limits output voltage ripple to <20mV under full load, and maintains regulation during fast load transients up to 1.5A/15µs.
Does the MAX77816AEWP+T support true shutdown with register retention?
Yes, the MAX77816AEWP+T implements True Shutdown™, reducing supply current to ≤1µA at +25°C when EN is low. During shutdown, all type-O registers retain their last-written values, enabling immediate resumption of operation without host reinitialization. This behavior is confirmed in the Detailed Description section and validated across the -40°C to +85°C operating range, making the MAX77816AEWP+T ideal for low-power suspend/resume sequences.
What protection features are integrated into the MAX77816AEWP+T?
The MAX77816AEWP+T integrates soft-start, thermal shutdown (+165°C with 20°C hysteresis), overcurrent protection (latching after 3ms ILIM violation), short-circuit protection, and input undervoltage lockout (2.375V rising threshold). These protections operate independently of I²C control and remain active in all operating modes - ensuring robust system-level reliability even if host firmware fails or communication is lost.
MAX77816AEWP+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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLP (1.83x2.13)
MAX77816AEWP+T FAQ
1.How can I place an order for MAX77816AEWP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77816AEWP+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 MAX77816AEWP+T reliable?
The price and inventory of MAX77816AEWP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77816AEWP+T is usually 5 days.
3.What payment methods are accepted for MAX77816AEWP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77816AEWP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77816AEWP+T?
MAX77816AEWP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77816AEWP+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 MAX77816AEWP+T?
For technical support, including MAX77816AEWP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77816AEWP+T requirements.
6.How does Aetrix verify that MAX77816AEWP+T is sourced from the original manufacturer or authorized distributors?
All MAX77816AEWP+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 MAX77816AEWP+T meets industry standards.
7.What is the process for return or replacement of MAX77816AEWP+T?
All MAX77816AEWP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77816AEWP+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 MAX77816AEWP+T part is unused and in its original packaging.
Return procedure for MAX77816AEWP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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