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Analog Devices Inc./Maxim Integrated MAX20343BEWE+T
- Part No.:
- MAX20343BEWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX20343BEWE+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,760
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Product details
Overview
The MAX20343BEWE+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 a primary power supply for optical sensor modules and LPWAN radios where low noise, high efficiency, and deep discharge energy harvesting are critical.
For engineers reviewing the MAX20343BEWE+T datasheet, MAX20343BEWE+T pinout, MAX20343BEWE+T application, or MAX20343BEWE+T equivalent, key selection considerations include its 16-bump WLP package (1.77mm × 2.01mm), I²C-controlled configuration, dynamic voltage scaling (DVS) support, and -40°C to +85°C operating temperature range - all validated for biometric PPG and NB-IoT radio power delivery.
Technical Context
The MAX20343BEWE+T implements a proprietary control algorithm that dynamically shifts between buck, buck-boost, and boost modes without output discontinuities or subharmonic ripple-enabling stable operation across wide input ranges (1.9V–5.5V). Its valley/zero-current detection and adaptive peak current limiting ensure optimal transient response during LED pulse bursts or LPWAN transmission events.
It integrates a configurable feedback integrator, FAST pin pretriggering, and RSEL-based fixed-output programming (via external resistor), supporting both I²C register access and single-pin enable configurations. The device operates with no external compensation required and supports dynamic voltage scaling to minimize LED headroom and reduce system power consumption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 3.5µA typical - enables multi-year battery life in always-on optical sensors |
| Startup Voltage | 1.9V - allows direct start from partially discharged supercapacitors or coin cells |
| Output Power | 3.5W max (integrator enabled) - powers high-current LED drivers or LPWAN transceivers |
| Output Voltage Range | 2.5V–5.5V in 50mV steps - supports flexible rail selection for analog front-ends and RF ICs |
| Operating Temp | -40°C to +85°C - qualified for industrial and wearable environmental conditions |
| Package | 16-bump WLP, 1.77mm × 2.01mm, 0.4mm pitch - enables placement on compact optical modules |
| I²C Interface | Up to 680kHz clock rate with status interrupts - enables real-time fault monitoring and DVS control |
Pinout & Package
MAX20343BEWE+T is packaged in a 16-bump, 1.77mm × 2.01mm, 0.4mm pitch Wafer-Level Package (WLP) with exposed die pad for thermal management. Pin assignment matches the I²C-Controlled WLP variant per datasheet Figure 16.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CAP | Bypass capacitor node | Connects 470nF ceramic cap to GND for internal LDO stability |
| GND (A2/B2/C2) | Power ground | Multiple dedicated ground bumps reduce impedance and improve EMI performance |
| IN (A3/A4) | Main input supply | Accepts 1.9V–5.5V; requires ≥5µF effective capacitance placed adjacent to pins |
| FAST/RSEL (B1) | Multipurpose control pin | Factory-configured as FAST pin for load transient pretriggering (not RSEL in this variant) |
| LVLX (B3/B4) | Low-side switch driver | Drives external low-side MOSFET; requires careful layout to minimize shoot-through risk |
| HVLX (C3/C4) | High-side switch driver | Drives external high-side MOSFET; paired with LVLX for synchronous buck-boost operation |
| SCL/SDA (C1/D1) | I²C serial interface | Supports standard/fast-mode I²C up to 680kHz; includes interrupt-capable INT pin (D2) |
| OUT (D3/D4) | Regulated output | Delivers precise, low-noise output; connects directly to load with minimal external filtering |
Key Features
| Feature | Design Value |
|---|---|
| Seamless mode transition | Eliminates output voltage discontinuities and subharmonics across 1.9V–5.5V input range |
| Dynamic Voltage Scaling (DVS) | Reduces LED supply headroom in real time, cutting optical subsystem power by up to 30% |
| Ultra-low noise profile | Enables photoplethysmography (PPG) operation at µA-level LED currents without signal interference |
| FAST pin pretriggering | Reduces load transient settling time by >40% versus standard enable-only response |
| Configurable integrator loop | Disabling integrator increases max output power to 3.5W but limits stable operation to VIN > 2.7V |
Applications
| Biometric Optical Sensing (PPG) | LPWAN Radio Supply (NB-IoT) |
|---|---|
Use Scenario: Wearable heart-rate monitor using green LED and photodiode array. IC Role / Device Role / Timing Role: Primary LED bias supply with DVS-controlled output voltage synchronized to LED pulse timing. Use Value: 3.5µA quiescent current extends battery life to >2 years; low-light-load ripple avoids corruption of weak PPG AC signals. | Use Scenario: Cellular IoT node transmitting periodic NB-IoT uplink bursts from supercapacitor-buffered battery. IC Role / Device Role / Timing Role: High-efficiency buck-boost converter extracting residual energy down to 1.9V input. Use Value: Near-zero minimum operating voltage maximizes usable supercapacitor energy; 3.5W burst capability meets LTE Cat-M1 peak current demands. |
| Industrial Sensor Node | Remote Optical Module |
Use Scenario: Battery-powered gas sensor with electrochemical cell and analog signal chain. IC Role / Device Role / Timing Role: Single-rail power source for precision ADC, op-amps, and low-power MCU. Use Value: Ultra-low IQ minimizes self-heating drift; tight ±2.4% output accuracy ensures consistent sensor excitation and measurement integrity. | Use Scenario: Miniaturized optical module mounted on flexible PCB away from main host board. IC Role / Device Role / Timing Role: Local point-of-load regulator eliminating long, noisy power traces to remote sensor. Use Value: 1.77mm × 2.01mm WLP footprint fits constrained optical housing; low EMI enables co-location with sensitive analog photodiodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20344BEWE+T | Same architecture, extended -40°C to +125°C temp range; higher 12.5µA IQ at +125°C | Required for under-hood automotive or high-temp industrial deployments | Select when ambient exceeds +85°C; otherwise MAX20343BEWE+T offers lower IQ at typical temps |
| TPS63802DLAR | 3.0V–5.5V input, 2.5V–5.5V output, 4µA IQ, 2.5W max power, 12-pin QFN only | Lacks DVS, FAST pin, and <1.9V startup; no WLP option | Choose for cost-sensitive, non-optical applications where 3.5W burst and ultra-low-VIN operation are not required |
Compared with MAX20344BEWE+T and TPS63802DLAR, the MAX20343BEWE+T uniquely combines sub-2V startup, 3.5µA IQ, DVS, and WLP packaging - making it the only fit for space-constrained, battery-critical optical sensing systems requiring deep discharge utilization and microamp-level standby.
Availability
MAX20343BEWE+T is available at Aetrix Electronics and suitable for biometric wearables, LPWAN gateways, and industrial sensor nodes requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX20343BEWE+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 family was designed specifically for ultra-low-power, noise-sensitive applications including optical biosensors and LPWAN edge devices - prioritizing quiescent current, startup voltage, and output stability over raw efficiency.
FAQ
What is the minimum input voltage required for MAX20343BEWE+T to start switching?
The MAX20343BEWE+T requires a minimum input voltage of 1.9V to initiate startup and begin regulation. This enables operation from deeply discharged supercapacitors or single-cell Li-SOCl₂ batteries. Below 1.9V, the device remains in shutdown with only 0.3µA quiescent current. Once started, it continues regulating down to near-zero input voltage depending on load and output settings.
Does MAX20343BEWE+T support dynamic voltage scaling (DVS), and how is it implemented?
Yes, MAX20343BEWE+T supports DVS via its I²C interface. By writing to the VOUT_SET register, the output voltage can be adjusted in 50mV steps in real time - enabling precise LED bias control during PPG acquisition. This reduces unnecessary headroom and cuts average power consumption by up to 30% compared to fixed-voltage operation.
What package type is used for MAX20343BEWE+T, and what are its key mechanical dimensions?
MAX20343BEWE+T uses a 16-bump Wafer-Level Package (WLP) with dimensions of 1.77mm × 2.01mm and 0.4mm bump pitch. The package code is W161C2+1, and it features an exposed silicon die for thermal conduction. This ultra-compact form factor allows direct mounting on optical modules or flex PCBs where space is severely constrained.
Can MAX20343BEWE+T operate without an external inductor or output capacitor?
No, MAX20343BEWE+T requires an external inductor (typically 1µH or 2.2µH) and output capacitor (minimum 8µF effective) to function. However, its architecture minimizes required values: inductors and capacitors in 0402/0603 case sizes are supported, and the design eliminates need for external compensation components - reducing total solution size and BOM count.
How does the FAST pin on MAX20343BEWE+T improve load transient response?
The FAST pin on MAX20343BEWE+T pretriggers the control loop before a load step occurs - increasing quiescent current from 3.5µA to 35µA temporarily to accelerate gate drive and reduce output droop. This cuts load transient settling time by more than 40% compared to standard enable-only operation, which is critical for pulsed LED drivers and burst-mode radios.
MAX20343BEWE+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:
- 400kHz ~ 680kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLP (1.77x2.01)
MAX20343BEWE+T FAQ
1.How can I place an order for MAX20343BEWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20343BEWE+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 MAX20343BEWE+T reliable?
The price and inventory of MAX20343BEWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20343BEWE+T is usually 5 days.
3.What payment methods are accepted for MAX20343BEWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20343BEWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20343BEWE+T?
MAX20343BEWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20343BEWE+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 MAX20343BEWE+T?
For technical support, including MAX20343BEWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20343BEWE+T requirements.
6.How does Aetrix verify that MAX20343BEWE+T is sourced from the original manufacturer or authorized distributors?
All MAX20343BEWE+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 MAX20343BEWE+T meets industry standards.
7.What is the process for return or replacement of MAX20343BEWE+T?
All MAX20343BEWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20343BEWE+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 MAX20343BEWE+T part is unused and in its original packaging.
Return procedure for MAX20343BEWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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