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Analog Devices Inc./Maxim Integrated MAX77348AEWE+T
- Part No.:
- MAX77348AEWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-XFBGA, WLBGA
- Datasheet:
-
MAX77348AEWE+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,314
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Product details
Overview
MAX77348AEWE+T from Analog Devices is an ultra-low quiescent current (3.5μA typ), non-inverting buck-boost DC-DC converter delivering up to 3.5W output power with programmable 2.5V–4.8V output voltage, I²C interface, and integrated active discharge. It operates from 2.3V–5.5V input and targets battery-powered RF and audio systems requiring low noise and high efficiency.
For engineers reviewing the MAX77348AEWE+T datasheet, MAX77348AEWE+T pinout, MAX77348AEWE+T application, or MAX77348AEWE+T equivalent, key selection considerations include its seamless buck/buck-boost/boost mode transition, 6.4ms soft-start, thermal shutdown, UVLO protection, and WLP-16 package compatibility with space-constrained TWS earbuds and NB-IoT sensors.
Technical Context
The MAX77348AEWE+T employs a peak/valley current-controlled hysteretic architecture with adaptive current control and configurable integrator (IntegEn bit) to balance transient response speed versus load regulation error. Its unique control algorithm eliminates subharmonics and discontinuities across input/output voltage ratios by dynamically sequencing four switching phases (Φ1–Φ4) using internal MP1/MN1/MP2/MN2 FETs.
It supports real-time Dynamic Voltage Scaling (DVS) via I²C register 0x02[5:0], configurable FET scaling (FETScale = 0/1) for light-load vs. heavy-load efficiency trade-offs, and switchover control (SwoFrcIN) to optimize quiescent current sourcing-either from VIN (lower IQ in boost mode) or VOUT (extended low-VIN operation down to ~2.1V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 5.5V - supports full Li-ion battery discharge curve including deep depletion below 2.5V when SwoFrcIN=0. |
| Output Voltage Range | 2.5V to 4.8V in 50mV steps - enables precise DVS for SoC core voltage scaling in portable devices. |
| Quiescent Current | 3.5μA (typ) - extends battery life in always-on sensor or standby audio subsystems. |
| Max Output Power | 3.5W (FETScale=0, VIN≥2.7V, VOUT≥3.2V) - sufficient for dual-TWS earbud charging and RF PA biasing. |
| Soft-Start Time | 6.4ms - prevents inrush current damage to input capacitors and upstream battery protection circuits. |
| I²C Clock Frequency | Up to 680kHz - enables fast configuration updates during system boot or mode transitions. |
| Thermal Shutdown | 135°C rising threshold - protects die integrity under sustained 3.5W load in compact WLP package. |
Pinout & Package
Package: 16-bump Wafer-Level Package (WLP), 1.77mm × 2.01mm, 0.4mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CAP | Bypass capacitor connection | Stabilizes internal LDO supply; requires 470nF ceramic capacitor to GND for noise immunity. |
| IN (A3, A4) | Main input supply | Accepts 2.3V–5.5V battery input; bypassed with ≥5µF effective capacitance near device. |
| OUT (D3, D4) | Regulated output | Delivers 2.5V–4.8V at up to 1A; requires 2×22µF (FETScale=0) or 1×22µF (FETScale=1) output capacitance. |
| LVLX (B3, B4) | Low-side switching node | Connects to HVLX via 1µH (FETScale=0) or 2.2µH (FETScale=1) inductor; carries peak/valley current. |
| HVLX (C3, C4) | High-side switching node | Completes buck-boost power stage; must be routed with low-inductance loop to minimize EMI. |
| EN | Enable control | Active-high logic input; default state depends on version - MAX77348A is EN-enabled at power-up. |
| SDA / SCL | I²C bidirectional data/clock | Supports real-time VOUT, IPSet, and mode reconfiguration; open-drain SDA requires pull-up. |
| INT | Interrupt output | Open-drain status flag (e.g., Power Good, UVLO, thermal alert); requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 3.5μA typical quiescent current enables >1-year shelf life in coin-cell–powered IoT sensors. |
| Seamless mode transition | Eliminates output voltage discontinuities and subharmonic ripple across buck/buck-boost/boost boundaries. |
| Integrated active discharge | 20mA discharge current safely collapses VOUT within milliseconds after disable, preventing latch-up in downstream circuitry. |
| Configurable integrator control | Disabling IntegEn (register 0x04[2]) reduces load transient settling time for PPG or optical sensor timing-critical applications. |
| Dynamic Voltage Scaling (DVS) | VOUT adjustable in 50mV steps via I²C without restart - essential for adaptive SoC power management in wearables. |
Applications
| True Wireless Stereo (TWS) Earbuds | Narrowband IoT (NB-IoT) Sensors |
|---|---|
Use Scenario: Powering dual earbud main SoC and Bluetooth radio from single Li-ion cell with tight PCB area budget. IC Role / Device Role / Timing Role: Primary non-inverting buck-boost regulator supplying 3.3V/1.8V rails with DVS support for dynamic SoC frequency scaling. Use Value: 3.5μA IQ extends playback time; low-noise operation avoids RF interference with 2.4GHz BT link; WLP-16 footprint saves >1.5mm² vs. QFN alternatives. | Use Scenario: Long-life battery-powered gas or temperature sensor node transmitting infrequently over LTE-M/NB-IoT. IC Role / Device Role / Timing Role: System power manager converting depleted Li-SOCl₂ or Li-MnO₂ cell (2.5V–3.6V) to stable 3.0V for MCU and transceiver. Use Value: 2.3V start-up and <2.5V operating capability extracts >15% additional energy from primary cell; UVLO + thermal shutdown ensure field reliability. |
| Portable Audio DAC/Amplifier | Optical Sensor Subsystem (PPG) |
Use Scenario: Supplying low-noise analog rail to stereo DAC and Class-D amplifier in Bluetooth speaker or headphone amp. IC Role / Device Role / Timing Role: Low-ripple, low-EMI power source replacing post-LDO filtering; supports dynamic headroom adjustment via DVS. Use Value: Eliminates need for external LDO in noise-sensitive audio path; 6.4ms soft-start prevents pop/click at power-on; ±2.4% VOUT accuracy ensures consistent DAC reference. | Use Scenario: Driving LED current and ADC bias in wrist-worn photoplethysmography (PPG) module with strict EMI and timing constraints. IC Role / Device Role / Timing Role: Fast-settling, low-noise power rail enabling <100μs LED pulse synchronization and minimal measurement artifact. Use Value: Integrator disable (IntegEn=0) achieves <50μs load transient recovery; low 3.5μA IQ preserves battery during sleep cycles between measurements. |
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 | Higher IQ (1.5μA), fixed 3.3V/3.6V outputs only; no I²C, no DVS, no active discharge. | Suitable for cost-sensitive, fixed-rail applications where programmability and safety features are secondary. | Select when board space allows larger 2.5mm × 2.5mm QFN and system firmware lacks I²C control capability. |
| RTQ2132BWGE | 4.5μA IQ, 2.7V–5.5V input, 2.5V–5.0V output, I²C interface, but no active discharge or thermal shutdown interrupt. | Targeted at industrial sensors needing wider VOUT range and basic configurability, but less stringent safety requirements. | Choose if thermal monitoring is handled externally and active discharge is not required for system-level safety compliance. |
Compared with TPS63802DLAR and RTQ2132BWGE, the MAX77348AEWE+T uniquely combines ultra-low IQ, full I²C programmability, integrated active discharge, and thermal/UVLO interrupts in a 1.77mm × 2.01mm WLP-making it optimal for miniaturized, safety-critical, and dynamically managed portable systems.
Availability
MAX77348AEWE+T is available at Aetrix Electronics and suitable for True Wireless Stereo (TWS) earbuds, Narrowband IoT (NB-IoT) sensor nodes, and portable audio/wireless systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX77348AEWE+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, serving precision instrumentation, communications, and industrial markets.
The MAX77348AEWE+T belongs to Analog Devices' ultra-low-power PMIC family, designed specifically for battery-constrained wearable and IoT edge devices demanding nanoscale IQ, low-noise regulation, and intelligent power management via I²C.
FAQ
What is the minimum input voltage required for MAX77348AEWE+T to start up and maintain regulation?
The MAX77348AEWE+T guarantees startup at 2.3V input. After startup, it can operate down to ~2.1V (VIN_UVLO_FALLING threshold) when SwoFrcIN = 0, using VOUT to bias internal FETs. Below that, output disables due to UVLO. This enables full energy extraction from single-cell Li-ion batteries before cutoff.
Does MAX77348AEWE+T support dynamic voltage scaling (DVS), and how is it implemented?
Yes, MAX77348AEWE+T supports real-time DVS via I²C register 0x02[5:0] (VSet). The output voltage can be adjusted in 50mV steps from 2.5V to 4.8V while enabled-no restart required. This allows adaptive SoC core voltage scaling during different operational modes in wearables and IoT devices.
What protection features are integrated into MAX77348AEWE+T?
MAX77348AEWE+T integrates undervoltage lockout (UVLO) on both input (2.10V falling) and output (1.87V falling), thermal shutdown (135°C rising), output active discharge (20mA sink), and soft-start (6.4ms). All protections generate status flags accessible via I²C and optional INT pin assertion.
How does the FETScale setting affect MAX77348AEWE+T performance?
FETScale = 0 configures MAX77348AEWE+T for 1µH inductor and up to 3.5W output; FETScale = 1 uses 2.2µH and caps output at 1.75W but improves light-load efficiency. Selection trades maximum power capability for efficiency optimization in specific load regions-critical for balancing runtime vs. peak performance in portable designs.
Is MAX77348AEWE+T pin-compatible with MAX77348BEWE+T, and what distinguishes them?
Yes, MAX77348AEWE+T and MAX77348BEWE+T share identical pinout, package, and electrical specifications. They differ only in factory-default EN pin behavior: MAX77348A powers up enabled; MAX77348B powers up disabled. Both support identical I²C configuration and functional operation once enabled.
MAX77348AEWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-XFBGA, 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):
- 2.5V
- Voltage - Output (Max):
- 4.8V
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLP (1.77x2.01)
MAX77348AEWE+T FAQ
1.How can I place an order for MAX77348AEWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77348AEWE+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 MAX77348AEWE+T reliable?
The price and inventory of MAX77348AEWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77348AEWE+T is usually 5 days.
3.What payment methods are accepted for MAX77348AEWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77348AEWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77348AEWE+T?
MAX77348AEWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77348AEWE+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 MAX77348AEWE+T?
For technical support, including MAX77348AEWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77348AEWE+T requirements.
6.How does Aetrix verify that MAX77348AEWE+T is sourced from the original manufacturer or authorized distributors?
All MAX77348AEWE+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 MAX77348AEWE+T meets industry standards.
7.What is the process for return or replacement of MAX77348AEWE+T?
All MAX77348AEWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77348AEWE+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 MAX77348AEWE+T part is unused and in its original packaging.
Return procedure for MAX77348AEWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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