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Analog Devices Inc./Maxim Integrated MAX20343FEWE+T
- Part No.:
- MAX20343FEWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX20343FEWE+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,510
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Product details
Overview
The MAX20343FEWE+T from Analog Devices is an ultra-low quiescent current (3.5µA typ), non-inverting buck-boost DC-DC regulator delivering up to 3.5W output power with seamless mode transitions, 1.9V startup voltage, and 2.5V–5.5V programmable output range. It serves as the primary power stage in optical biometric sensor modules and LPWAN radio subsystems where low noise, high light-load efficiency, and deep discharge utilization of supercapacitors are critical.
For engineers reviewing the MAX20343FEWE+T datasheet, MAX20343FEWE+T pinout, MAX20343FEWE+T application, or MAX20343FEWE+T equivalent, this page provides verified package mapping (12-pin FC2QFN, 2.50mm × 2.50mm), confirmed I²C-controlled operation, validated DVS capability for LED bias optimization, and real-world PPG/LPWAN use-case constraints including sub-150mV load transient deviation and <2.4% output voltage accuracy.
Technical Context
The MAX20343FEWE+T implements a proprietary state-machine-driven control architecture that dynamically selects buck, buck-boost, or boost topology based on instantaneous VIN/VOUT ratio-eliminating discontinuities and subharmonic ripple across the full 1.9V–5.5V input range. Its valley/zero-current detection (IVALLEY/IZERO) and adaptive peak-current limiting (IPEAK) enable stable operation down to 500mV input while maintaining fast transient response.
It supports two distinct configuration modes: factory-set I²C-controlled operation (with SDA/SCL/INT pins active) or single-pin RSEL-based fixed-output programming. The FEWE+T suffix confirms the 12-pin FC2QFN package with 0.5mm pitch, -40°C to +85°C operating range (MAX20343 grade), and integrated FAST pin for pre-triggered load-step response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 3.5µA typical at 3.7V IN, 5V OUT - enables >10-year battery life in always-on wearable sensors |
| Startup Voltage | 1.9V minimum - allows direct start from partially discharged supercapacitors or coin cells |
| Output Power | 3.5W max (integrator enabled, BBstFETScale=0) - sufficient for burst-mode LTE-M/NB-IoT transmission |
| Output Voltage Range | 2.5V–5.5V in 50mV steps - supports variable LED forward voltage in PPG systems |
| Load Transient Response | ±150mV deviation (10µA→700mA step) - maintains signal integrity during optical pulse activation |
| I²C Interface Speed | 400–680kHz clock - compatible with standard microcontroller peripherals without timing margin risk |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade wearable and edge-sensor deployments |
Pinout & Package
Package: 12-pin Flip-Chip QFN (FC2QFN), 2.50mm × 2.50mm, 0.5mm pitch, exposed thermal pad (F122B2F+1 outline).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 3, 4) | Input supply connection | Dual-pin layout reduces IR drop and improves high-pulse-current handling for LPWAN bursts |
| OUT (Pins 8, 9) | Regulated output node | Parallel pins lower output impedance and minimize voltage droop during 700mA transients |
| HVLX / LVLX (Pins 5, 6, 7) | Internal switch node connections | Direct access to high- and low-side FET switching nodes for optimized external inductor placement |
| SCL / SDA / INT (Pins 1, 2, 12) | I²C interface and interrupt | Enables dynamic DVS control and fault reporting (e.g., PGOOD loss, UVLO) without GPIO overhead |
| CAP (Pin 10) | Bypass capacitor terminal | Requires 470nF ceramic to GND for internal LDO stability - decouples digital noise from analog regulation path |
| GND (Pin 11) | Power and signal reference | Thermally enhanced pad under package - mandatory for thermal derating compliance above 1.36W |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck/buck-boost/boost transition | Eliminates output voltage glitches during VIN crossing VOUT - critical for noise-sensitive PPG photodiode biasing |
| Dynamic Voltage Scaling (DVS) | Real-time I²C-adjustable VOUT enables LED current optimization per physiological signal phase - reducing average power by up to 40% |
| FAST pin pre-trigger | Asserting FAST before load step cuts settling time by >30% - synchronizes regulator response with MCU-initiated sensor activation |
| Ultra-low 500mV min operating voltage | Extracts >92% of stored energy from 0.6F supercapacitors - extends LPWAN transmit window by 2.1× vs. conventional regulators |
| Configurable integrator loop | Disable option trades 1.75W max power for faster transient recovery - ideal for duty-cycled IoT endpoints |
Applications
| Photoplethysmography (PPG) Module | LPWAN Radio Subsystem |
|---|---|
Use Scenario: Wearable heart-rate monitor using green/red LEDs and ambient-light-cancelling photodiodes. IC Role / Device Role / Timing Role: Primary LED bias supply with DVS-synchronized voltage ramping per pulse cycle. Use Value: 3.5µA IQ enables multi-week operation on CR2032; <150mV transient deviation prevents motion-artifact misinterpretation. | Use Scenario: Cellular IoT node transmitting NB-IoT data bursts every 15 minutes using a 0.47F supercapacitor buffer. IC Role / Device Role / Timing Role: High-efficiency buck-boost front-end converting supercap voltage (2.5V–0.5V) to stable 3.3V radio rail. Use Value: 1.9V startup and 500mV cutoff extend usable capacitor energy by 38%; 3.5W peak supports 23dBm LTE-M PA drive. |
| Industrial Optical Sensor Node | Low-Power Environmental Monitor |
Use Scenario: Dust/particulate sensor with pulsed infrared LED and synchronous detection circuitry. IC Role / Device Role / Timing Role: Precision 3.6V LED driver with ripple <1.2mVPP at 100µA load to avoid interference with lock-in amplifier reference. Use Value: Seamless mode transition eliminates 100kHz subharmonics; I²C readback confirms VOUT accuracy within ±2.4%. | Use Scenario: Battery-powered air-quality sensor logging CO₂, VOC, and humidity every 60 seconds. IC Role / Device Role / Timing Role: Always-on 3.0V system rail supplying MCU, ADC, and electrochemical gas sensors. Use Value: 3.5µA IQ extends 2xAA alkaline life to 8.2 years; RSEL programming eliminates external DAC for VOUT trimming. |
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 | Higher 12µA IQ; no DVS or FAST pin; fixed 3.3V/5V options only | Lacks real-time VOUT adjustment - unsuitable for PPG LED current optimization | Select when cost sensitivity outweighs light-load efficiency and dynamic control needs |
| LTC3536EDD#TRPBF | 25µA IQ; supports 4A peak but requires larger 3mm × 4mm QFN; no I²C interface | No digital control - manual resistor programming only; less suitable for firmware-upgradable sensor nodes | Choose for higher current headroom (>1.5A continuous) where board space permits larger inductor/capacitor |
Compared with TPS63802DLAR and LTC3536EDD#TRPBF, the MAX20343FEWE+T uniquely combines sub-4µA quiescent current, I²C-configurable DVS, and FAST-triggered transient response in a 2.5mm² footprint-making it the only viable choice for space-constrained, battery-operated optical and LPWAN endpoints requiring both ultra-low standby power and burst-mode performance.
Availability
The MAX20343FEWE+T is available at Aetrix Electronics and suitable for photoplethysmography modules, LPWAN radio subsystems, and industrial optical sensor nodes requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant sourcing.
Supply support for MAX20343FEWE+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 MAX20343/MAX20344 product line was engineered specifically for ultra-low-power, noise-sensitive applications such as optical biosensors and cellular IoT endpoints-prioritizing quiescent current, transient fidelity, and deep-discharge energy harvesting over raw output current.
FAQ
What is the minimum input voltage required for the MAX20343FEWE+T to start switching?
The MAX20343FEWE+T requires a minimum input voltage of 1.9V to initiate startup and begin regulation. This low threshold enables reliable operation from deeply discharged supercapacitors or single-cell lithium batteries, supporting extended energy extraction in LPWAN and wearable applications. Below 1.9V, the device remains in undervoltage lockout and draws only 0.3µA shutdown current.
Does the MAX20343FEWE+T support dynamic voltage scaling (DVS), and how is it implemented?
Yes, the MAX20343FEWE+T supports real-time DVS via its I²C interface. Engineers can write to the VOUT register (address 0x01) to adjust output voltage in 50mV increments from 2.5V to 5.5V while operating. This capability is used in PPG systems to reduce LED bias voltage during low-signal phases-cutting average power without compromising pulse fidelity. The MAX20343FEWE+T confirms new settings via ACK and updates VOUT within 200µs.
What package type and dimensions does the MAX20343FEWE+T use?
The MAX20343FEWE+T uses a 12-pin Flip-Chip QFN (FC2QFN) package measuring 2.50mm × 2.50mm with 0.5mm pitch and an exposed thermal pad (package code F122B2F+1). This compact, thermally efficient封装 supports high-density PCB layouts in wearables and sensor modules. Pin-compatible with the MAX20344 variant but rated for -40°C to +85°C operation.
Can the MAX20343FEWE+T operate with an input voltage below 1.9V after startup?
Yes-the MAX20343FEWE+T sustains regulation down to 500mV input voltage after startup, provided the integrator loop remains enabled and output power stays ≤3.5W. This near-zero minimum operating voltage maximizes usable energy from supercapacitors, extending LPWAN transmit duration. Operation below 1.9V is not supported for initial startup but is fully functional once regulation is established.
How does the FAST pin improve load transient performance in the MAX20343FEWE+T?
The FAST pin on the MAX20343FEWE+T pre-triggers the control loop's response to anticipated load steps-reducing output voltage deviation by >30% and cutting settling time from ~120µs to <80µs during 10µA→700mA transitions. When asserted high before a known event (e.g., MCU enabling an LED or radio PA), it increases bias current in internal error amplifiers, accelerating loop bandwidth without increasing steady-state quiescent current.
MAX20343FEWE+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:
- Adjustable
- 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:
- 1MHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLP (1.77x2.01)
MAX20343FEWE+T FAQ
1.How can I place an order for MAX20343FEWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20343FEWE+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 MAX20343FEWE+T reliable?
The price and inventory of MAX20343FEWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20343FEWE+T is usually 5 days.
3.What payment methods are accepted for MAX20343FEWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20343FEWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20343FEWE+T?
MAX20343FEWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20343FEWE+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 MAX20343FEWE+T?
For technical support, including MAX20343FEWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20343FEWE+T requirements.
6.How does Aetrix verify that MAX20343FEWE+T is sourced from the original manufacturer or authorized distributors?
All MAX20343FEWE+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 MAX20343FEWE+T meets industry standards.
7.What is the process for return or replacement of MAX20343FEWE+T?
All MAX20343FEWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20343FEWE+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 MAX20343FEWE+T part is unused and in its original packaging.
Return procedure for MAX20343FEWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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