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Analog Devices Inc./Maxim Integrated MAX20343CEWE+T
- Part No.:
- MAX20343CEWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX20343CEWE+T.pdf
- Description:
- IC REG BUCK BOOST PROG 1A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,803
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Product details
Overview
The MAX20343CEWE+T from Analog Devices is an ultra-low quiescent current (3.5µA typ), non-inverting buck-boost regulator delivering up to 3.5W output power with seamless mode transitions between buck, buck-boost, and boost. It operates from 1.9V startup input down to near-zero minimum voltage and supports dynamic voltage scaling (DVS) for optical sensor and LPWAN radio power management.
For engineers reviewing the MAX20343CEWE+T datasheet, MAX20343CEWE+T pinout, MAX20343CEWE+T application, or MAX20343CEWE+T equivalent, key selection criteria include its 16-bump WLP package (1.77mm × 2.01mm), I²C-controlled operation, low-noise output ripple critical for PPG systems, and configurable peak current for fast load transient response in battery-constrained IoT endpoints.
Technical Context
The MAX20343CEWE+T implements a proprietary state-machine-driven control architecture that dynamically selects operating mode based on real-time VIN/VOUT ratio, eliminating subharmonics and discontinuities across the full input range. Its valley/zero-current detection (IVALLEY/IZERO) enables precise switching-phase alignment.
It integrates dual FET scaling (BBstFETScale = 0/1), optional feedback integrator enable/disable, and FAST pin pretriggering-allowing trade-offs between 3.5W/1.75W output power capability and load transient settling time. The device supports both I²C interface (with status interrupts) and single-pin RSEL voltage programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 3.5µA typical at 3.7V IN, enabling multi-year battery life in always-on wearable sensors. |
| Startup Input Voltage | 1.9V minimum, allowing direct use with partially discharged Li-SOCl₂ or supercapacitor sources. |
| Max Output Power | 3.5W with integrator enabled; drops to 1.75W when integrator disabled for faster transient response. |
| Output Voltage Range | 2.5V–5.5V in 50mV steps, programmable via I²C or RSEL resistor network. |
| Operating Temp Range | -40°C to +85°C, qualified for industrial and medical-grade optical sensing modules. |
| Package | 16-bump WLP, 1.77mm × 2.01mm, 0.4mm pitch - optimized for space-constrained optical PCBs. |
| I²C Clock Frequency | 400–680kHz, supporting standard/fast-mode communication without external clock conditioning. |
Pinout & Package
MAX20343CEWE+T is supplied in a 16-bump, 1.77mm × 2.01mm, 0.4mm pitch Wafer-Level Package (WLP) with I²C control interface. Bump layout follows top-view (bump side down) configuration per datasheet Figure 16.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CAP | Bypass capacitor node | Connects 470nF ceramic cap to GND for internal LDO stabilization; critical for noise-sensitive analog supply rails. |
| IN (A3, A4) | Main input supply | Dual-bump connection reduces parasitic inductance; requires ≥5µF effective bypass capacitance placed adjacent to pins. |
| OUT (C3, C4) | Regulated output | Dual-bump high-current path minimizes IR drop; supports up to 1A continuous load with proper thermal layout. |
| SCL / SDA (B4 / C1) | I²C serial interface | Open-drain, 1.4V logic-high threshold; supports 400kHz–680kHz bus speeds with integrated pull-up compatibility. |
| FAST / RSEL (B1) | Configurable control pin | Factory-configured as FAST pin: high = faster transient response (35µA IQ); low = ultra-low-power mode (3.5µA IQ). |
| GND (A2, B2, C2) | Ground reference | Three dedicated ground bumps provide low-impedance return path for power and signal currents. |
| LVLX / HVLX (B3, C2 / A3, B3) | Switch node connections | Separated low- and high-side switch terminals reduce cross-coupling; require tight loop layout with integrated inductor. |
| INT (D1) | Interrupt output | Active-low open-drain flag indicating fault conditions (e.g., PGOOD loss, overtemperature) for host MCU monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck/buck-boost/boost transition | Eliminates output voltage discontinuities and subharmonic ripple-enabling stable LED bias in photoplethysmography (PPG) without post-regulation LDO. |
| Dynamic Voltage Scaling (DVS) | Allows real-time VOUT adjustment to match instantaneous LED or RF transceiver demand, reducing average power by up to 30% in burst-mode LPWAN radios. |
| Ultra-low 3.5µA quiescent current | Extends coin-cell or thin-film battery lifetime beyond 5 years in always-on biometric sensors with periodic measurement cycles. |
| FAST pin pretriggering | Reduces load transient settling time by >40% versus standard mode-critical for maintaining voltage stability during sudden RF transmit bursts. |
| Configurable peak current limit | Enables optimization of inductor size and efficiency trade-off: BBstIPSet1/BBstIPSet2 register settings allow fine-tuning for 0.5A–1.2A applications. |
Applications
| Biometric Optical Sensing (PPG) | LPWAN Radio Supply (NB-IoT/Cat-M1) |
|---|---|
Use Scenario: Continuous heart-rate monitoring using green/red LEDs and photodiode in wrist-worn wearable. IC Role / Device Role / Timing Role: Primary power source for LED driver circuit, dynamically scaled via DVS to minimize optical interference while maintaining SNR. Use Value: Ultra-low output ripple (<1mV p-p) prevents LED current modulation artifacts; 3.5µA IQ enables >3-year CR2032 battery life with 1Hz sampling. | Use Scenario: Powering LTE-M or NB-IoT cellular modem during 100ms transmit bursts requiring 500mA peak current. IC Role / Device Role / Timing Role: Buck-boost regulator buffering supercapacitor energy storage to deliver high-current pulses without brownout. Use Value: Near-zero minimum operating voltage extracts >95% of stored energy from supercapacitor; FAST pin pretriggers response before RF PA activation. |
| Industrial Wireless Sensor Node | Low-Power Medical Patch Monitor |
Use Scenario: Battery-powered temperature/humidity sensor transmitting data every 5 minutes via LoRaWAN gateway. IC Role / Device Role / Timing Role: Main system regulator powering microcontroller, sensor ICs, and sub-GHz transceiver with adaptive sleep/wake cycling. Use Value: 1.9V startup allows operation down to 1.95V battery voltage; low EMI design avoids interference with sensitive analog sensor front-ends. | Use Scenario: Disposable ECG patch worn for 7-day continuous cardiac monitoring with Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Single-chip power solution for analog front-end, ADC, BLE SoC, and flash memory-replacing discrete LDO + boost combo. Use Value: 16-bump WLP footprint (1.77mm × 2.01mm) fits within 8mm² PCB area constraint; I²C configurability enables firmware-based VOUT tuning per patient calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63802DLCT | Higher 12µA IQ; fixed 3.3V/5V outputs only; no DVS or FAST pin; 2.5mm × 2.5mm QFN package. | Lacks dynamic voltage scaling and ultra-low-noise operation required for PPG; suitable for simpler always-on IoT nodes without analog sensitivity. | Select TPS63802DLCT only if fixed-output voltage and lower cost outweigh need for DVS and sub-5µA IQ. |
| MAX20344AEWE+T | Same architecture but rated for -40°C to +125°C; identical pinout and I²C register map; higher 12.5µA IQ at +125°C. | Designed for under-hood automotive or industrial environments where extended temperature operation is mandatory. | Choose MAX20344AEWE+T when ambient temperature exceeds +85°C; otherwise MAX20343CEWE+T offers better low-temp IQ performance. |
Compared with TPS63802DLCT and MAX20344AEWE+T, the MAX20343CEWE+T uniquely balances ultra-low IQ, DVS support, and optical-grade noise performance in the smallest WLP footprint-making it optimal for space- and power-constrained biometric endpoints.
Availability
MAX20343CEWE+T is available at Aetrix Electronics and suitable for biometric optical sensing, LPWAN radio power delivery, and industrial wireless sensor nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX20343CEWE+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, industrial automation, and healthcare markets.
The MAX20343CEWE+T belongs to Analog Devices' ultra-low-power buck-boost regulator family, engineered specifically for energy-harvesting and battery-operated optical and wireless sensing systems demanding minimal quiescent current and ultra-low noise.
FAQ
What is the minimum input voltage required for MAX20343CEWE+T to start regulation?
The MAX20343CEWE+T requires a minimum input voltage of 1.9V to initiate startup and begin regulation. This low startup threshold enables reliable operation from deeply discharged primary batteries or supercapacitors, maximizing usable energy extraction. Below 1.9V, the device remains in undervoltage lockout (UVLO) and draws only shutdown current (0.3µA).
Does MAX20343CEWE+T support dynamic voltage scaling (DVS), and how is it implemented?
Yes, MAX20343CEWE+T supports dynamic voltage scaling (DVS) via its I²C interface. By writing to the VOUT_SET register (address 0x01), the output voltage can be adjusted in 50mV steps from 2.5V to 5.5V in real time-enabling precise matching of LED forward voltage or RF transceiver supply requirements to minimize power waste during low-activity periods.
What package type and dimensions does MAX20343CEWE+T use, and is it RoHS-compliant?
MAX20343CEWE+T uses a 16-bump Wafer-Level Package (WLP) with outline 21-100328, measuring 1.77mm × 2.01mm and 0.4mm bump pitch. The "+" suffix in package code W161C2+1 indicates full RoHS compliance. This ultra-compact package is designed for placement directly on optical sensor modules where PCB space is severely constrained.
How does the FAST pin affect MAX20343CEWE+T performance, and what is its default configuration?
The FAST pin on MAX20343CEWE+T is factory-configured to function as a fast-transient-response control input. When pulled high, it increases quiescent current to 35µA to accelerate load step response; when low, IQ reverts to 3.5µA. This pin is not multiplexed with RSEL on this variant (MAX20343CEWE+T), ensuring dedicated transient optimization without compromising voltage programming.
Can MAX20343CEWE+T operate with input voltages below 2.1V, and what are the output limitations?
Yes, MAX20343CEWE+T supports input voltages as low as 1.9V for startup and down to near-zero for continued operation. However, when VIN falls below 2.1V, the regulated output voltage is clamped to a minimum of 3.2V (per datasheet Section "Input Operating Voltage") to maintain stability and prevent uncontrolled mode transitions in buck-only regions.
MAX20343CEWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-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):
- 1.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLP (1.77x2.01)
MAX20343CEWE+T FAQ
1.How can I place an order for MAX20343CEWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20343CEWE+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 MAX20343CEWE+T reliable?
The price and inventory of MAX20343CEWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20343CEWE+T is usually 5 days.
3.What payment methods are accepted for MAX20343CEWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20343CEWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20343CEWE+T?
MAX20343CEWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20343CEWE+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 MAX20343CEWE+T?
For technical support, including MAX20343CEWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20343CEWE+T requirements.
6.How does Aetrix verify that MAX20343CEWE+T is sourced from the original manufacturer or authorized distributors?
All MAX20343CEWE+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 MAX20343CEWE+T meets industry standards.
7.What is the process for return or replacement of MAX20343CEWE+T?
All MAX20343CEWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20343CEWE+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 MAX20343CEWE+T part is unused and in its original packaging.
Return procedure for MAX20343CEWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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