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Analog Devices Inc./Maxim Integrated MAX20343KEWE+T
- Part No.:
- MAX20343KEWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX20343KEWE+T.pdf
- Description:
- IC REG BUCK BOOST PROG 1A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,825
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Product details
Overview
MAX20343KEWE+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 buck/buck-boost/boost mode transitions, 1.9V startup voltage, and 2.5V–5.5V programmable output range. It serves as the primary power stage for optical biometric sensors and LPWAN radio subsystems where low noise, high light-load efficiency, and dynamic voltage scaling (DVS) are critical.
For engineers reviewing the MAX20343KEWE+T datasheet, MAX20343KEWE+T pinout, MAX20343KEWE+T application, or MAX20343KEWE+T equivalent, key selection considerations include its 16-bump WLP package (1.77mm × 2.01mm), I²C-controlled operation, -40°C to +85°C temperature rating, and ability to sustain 250mW output from just 500mV input - essential for supercapacitor-buffered energy harvesting systems.
Technical Context
The MAX20343KEWE+T implements a proprietary state-machine-driven control architecture that dynamically selects between buck-only, buck-boost, and boost modes based on real-time VIN/VOUT ratio, eliminating subharmonics and output discontinuities. Its valley/zero-current detection (IVALLEY/IZERO) and adaptive peak current limiting (IPEAK) enable stable operation across wide input ranges.
It supports two configuration modes: I²C-controlled (with SDA/SCL/INT pins) or single-pin RSEL-enabled (resistor-programmed VOUT), both implemented in the same 16-bump WLP package. The FAST pin pretriggers transient response, while integrator enable/disable (BBstIntegEn) trades output power capability (3.5W vs. 1.75W) for load settling speed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 3.5µA typical at no load - enables multi-year battery life in always-on wearable sensors. |
| Startup Voltage | 1.9V - allows direct start from partially discharged Li-SOCl₂ or supercapacitors. |
| Max Output Power | 3.5W with integrator enabled - sufficient for pulsed LED drivers in PPG systems. |
| Output Voltage Range | 2.5V–5.5V in 50mV steps - supports variable rail requirements of RF transceivers and analog front-ends. |
| Input Voltage Range | 1.8V–5.5V continuous - accommodates single-cell Li-ion, coin cells, and energy-harvesting sources. |
| Output Accuracy | ±2.4% over load/temperature - ensures stable biasing for precision optical detectors. |
| PGOOD Threshold | 84.7% of VOUT with 2.25% hysteresis - provides reliable power-good signaling for system sequencing. |
Pinout & Package
MAX20343KEWE+T is packaged in a 16-bump, 0.4mm pitch Wafer-Level Package (WLP), measuring 1.77mm × 2.01mm. This ultra-compact, bottom-side bumped construction enables placement directly on optical modules or space-constrained sensor PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CAP | Bypass capacitor node | Connects 470nF ceramic cap to GND for internal LDO stability; critical for low-noise operation. |
| GND (A2/B2/C2) | Power ground | Multiple dedicated ground bumps minimize impedance and improve EMI performance. |
| IN (A3/A4) | Main input supply | Accepts 1.8V–5.5V; requires ≥5µF effective capacitance placed adjacent to pins. |
| FAST/RSEL (B1) | Configurable control pin | Factory-configured as FAST (transient pretrigger) or RSEL (resistor-set VOUT); determines functional mode per Table 3. |
| 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; pairs with LVLX for synchronous buck-boost switching. |
| SCL/SDA/INT (C1/D1/D2) | I²C interface | Supports 400–680kHz clock; INT asserts on fault or status change for autonomous monitoring. |
| OUT (D3/D4) | Regulated output | Delivers programmable VOUT; connects to load with minimal trace inductance to preserve ripple performance. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless mode transition | Eliminates output voltage glitches during VIN crossing VOUT - avoids ADC saturation in PPG signal chains. |
| Dynamic Voltage Scaling (DVS) | Allows real-time VOUT adjustment to match LED current demand - reduces average power by >30% in heart-rate monitoring. |
| Ultra-low noise profile | Removes need for post-regulation LDO in optical sensing - cuts BOM count and board area. |
| Fast transient pretrigger | FAST pin activation reduces load step settling time by >40% - maintains LED brightness during rapid pulse sequences. |
| Flexible output programming | I²C register access or single-resistor RSEL selection - enables field firmware updates or hardware-only configuration. |
Applications
| Photoplethysmography (PPG) Sensor Module | LPWAN Radio Transceiver Supply |
|---|---|
Use Scenario: Wearable wrist-based heart-rate monitor using green LED and photodiode array. IC Role / Device Role / Timing Role: Primary buck-boost regulator powering LED driver and analog front-end with DVS-synchronized voltage scaling. Use Value: 3.5µA IQ extends coin-cell lifetime beyond 2 years; <150mV load transient undershoot prevents LED current droop during pulse bursts. | Use Scenario: NB-IoT cellular module in smart meter requiring 3.3V/500mA burst transmission every 15 minutes. IC Role / Device Role / Timing Role: Energy-harvesting interface regulator buffering supercapacitor to deliver 3.5W short-duration RF power. Use Value: 1.9V startup extracts >92% of stored supercapacitor energy; seamless mode transition avoids RF carrier interruption. |
| Industrial Optical Gas Sensor | Low-Power Environmental Monitor |
Use Scenario: NDIR-based CO₂ detector using IR emitter and thermopile in battery-powered HVAC controller. IC Role / Device Role / Timing Role: Precision voltage source for IR emitter bias and thermopile signal conditioning amplifier. Use Value: ±2.4% output accuracy ensures calibrated gas concentration readings; low ripple prevents false triggering in analog signal path. | Use Scenario: Soil moisture and temperature node powered by solar cell + thin-film battery, transmitting via LoRaWAN. IC Role / Device Role / Timing Role: Input-voltage-agnostic power manager adapting to variable solar harvest and battery decay. Use Value: 1.8V–5.5V input range accepts degraded battery down to 1.85V; 250mW @ 500mV enables operation during dawn/dusk low-light periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20344KEWE+T | Same architecture, but rated for -40°C to +125°C operation and offered only in FC2QFN package. | Targeted at under-hood automotive or industrial ambient environments exceeding +85°C. | Select MAX20344KEWE+T only if extended temperature range and FC2QFN thermal performance are required. |
| TPS63802DLAR | 3.0V–5.5V input, 2.5V–5.5V output, 2.5A max, 1.5µA IQ, but lacks DVS and seamless mode transition logic. | Lower-cost alternative for fixed-output, non-noise-critical applications without dynamic LED scaling. | Choose TPS63802DLAR when absolute lowest IQ is prioritized over optical-grade noise performance and DVS capability. |
Compared with MAX20344KEWE+T, the MAX20343KEWE+T offers identical regulation architecture and feature set but targets commercial temperature grade and WLP footprint - making it optimal for compact, cost-sensitive wearables. Versus TPS63802DLAR, it trades slightly higher IQ for superior transient behavior, integrated DVS, and lower output ripple - critical for biometric signal integrity.
Availability
MAX20343KEWE+T is available at Aetrix Electronics and suitable for photoplethysmography (PPG) sensor modules, LPWAN radio subsystems, and industrial optical gas analyzers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX20343KEWE+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. (ADI) 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 designed specifically for ultra-low-power, noise-sensitive applications such as optical biosensors and energy-constrained IoT endpoints - emphasizing quiescent current minimization, seamless regulation, and minimal external component count.
FAQ
What is the minimum input voltage required for MAX20343KEWE+T to start regulation?
The MAX20343KEWE+T requires a minimum input voltage of 1.9V to initiate startup and enter regulation. This low threshold enables operation from deeply discharged batteries or supercapacitors, supporting energy-harvesting designs where every millivolt of stored energy must be utilized. Below 1.9V, the device remains in undervoltage lockout (UVLO) and draws only shutdown current (0.3µA).
Does MAX20343KEWE+T support dynamic voltage scaling (DVS), and how is it implemented?
Yes, MAX20343KEWE+T supports Dynamic Voltage Scaling (DVS) via its I²C interface or RSEL pin. When configured for I²C control, registers allow real-time VOUT adjustment in 50mV steps - enabling precise matching of LED forward voltage in PPG systems to reduce power dissipation. DVS lowers headroom and improves overall system efficiency without compromising optical signal fidelity.
What package type and dimensions does MAX20343KEWE+T use?
MAX20343KEWE+T uses a 16-bump, 0.4mm pitch Wafer-Level Package (WLP) with outline dimensions of 1.77mm × 2.01mm. This ultra-compact, bottom-terminal package is optimized for placement on remote optical modules or densely populated sensor PCBs, minimizing interconnect inductance and easing thermal management in space-constrained wearables.
Can MAX20343KEWE+T operate with input voltages below 2.1V, and what are the output limitations?
Yes, MAX20343KEWE+T can operate with input voltages as low as 1.8V, but output voltage is restricted to 3.2V–5.5V when VIN < 2.1V (per datasheet Section "Input Operating Voltage"). This ensures stable regulation during deep discharge while maintaining sufficient headroom for noise-sensitive analog circuits - a key requirement in photodiode biasing and precision ADC reference supplies.
How does the FAST pin affect the performance of MAX20343KEWE+T?
The FAST pin on MAX20343KEWE+T pretriggers the control loop's transient response: when asserted high, it increases quiescent current to ~35µA and accelerates load step recovery, reducing settling time by >40%. This is especially valuable in PPG systems where rapid LED pulsing demands immediate voltage restoration - ensuring consistent optical signal amplitude without added output capacitance.
MAX20343KEWE+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):
- -
- Voltage - Output (Max):
- -
- 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)
MAX20343KEWE+T FAQ
1.How can I place an order for MAX20343KEWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20343KEWE+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 MAX20343KEWE+T reliable?
The price and inventory of MAX20343KEWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20343KEWE+T is usually 5 days.
3.What payment methods are accepted for MAX20343KEWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20343KEWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20343KEWE+T?
MAX20343KEWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20343KEWE+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 MAX20343KEWE+T?
For technical support, including MAX20343KEWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20343KEWE+T requirements.
6.How does Aetrix verify that MAX20343KEWE+T is sourced from the original manufacturer or authorized distributors?
All MAX20343KEWE+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 MAX20343KEWE+T meets industry standards.
7.What is the process for return or replacement of MAX20343KEWE+T?
All MAX20343KEWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20343KEWE+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 MAX20343KEWE+T part is unused and in its original packaging.
Return procedure for MAX20343KEWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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