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Analog Devices Inc./Maxim Integrated MAX20343BEWE+
- Part No.:
- MAX20343BEWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX20343BEWE+.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,606
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Product details
Overview
MAX20343BEWE+ 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 for optical sensor modules and LPWAN radio subsystems where low noise, high efficiency at light load, and deep discharge energy harvesting are critical.
For engineers reviewing the MAX20343BEWE+ datasheet, MAX20343BEWE+ pinout, MAX20343BEWE+ application, or MAX20343BEWE+ equivalent, this device is selected for biometric PPG systems requiring sub-150mV load transient response, ultra-low-noise LED biasing, dynamic voltage scaling (DVS), and operation down to 500mV input voltage in supercapacitor-buffered IoT edge nodes.
Technical Context
The MAX20343BEWE+ employs a proprietary state-machine-controlled architecture that dynamically selects buck, buck-boost, or boost operating modes based on real-time VIN/VOUT ratio-eliminating subharmonics and discontinuities in output ripple. Its valley/zero-current detection (IVALLEY/IZERO) and adaptive peak current control (IPEAK) enable stable regulation across 1.9V–5.5V input while maintaining <±2.4% output accuracy.
It integrates dual-loop control: a fast analog feedback loop for load transients and an optional digital integrator for improved line/load regulation. The FAST pin pretriggers switching response, reducing settling time by up to 67% versus standard mode, and the RSEL pin enables resistor-programmed VOUT without I²C interface-critical for space-constrained optical modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 3.5µA typical - enables >10-year battery life in always-on wearable sensors |
| Startup Input Voltage | 1.9V - allows direct start from partially discharged supercapacitors or single-cell Li-SOCl₂ |
| Max Output Power | 3.5W (integrator enabled) - supports burst-mode LTE-M/NB-IoT transmission at 3.5V/1A |
| Output Voltage Range | 2.5V–5.5V in 50mV steps - matches PPG LED forward voltage requirements and MCU I/O rails |
| Load Transient Response | −150mV deviation (10µA→700mA step) - maintains signal integrity in photodiode front-end circuits |
| Operating Temp Range | −40°C to +85°C - qualified for industrial-grade wearable and outdoor LPWAN endpoint deployment |
| Package Dimensions | 2.50mm × 2.50mm × 0.55mm FC2QFN - fits under 3mm optical dome in compact biosensor modules |
Pinout & Package
The MAX20343BEWE+ is packaged in a 12-pin, 2.50mm × 2.50mm, 0.5mm pitch Flip-Chip QFN (FC2QFN) with exposed thermal pad. This package delivers 58.7°C/W θJA on a 4-layer board and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 3, 4) | Input supply connection | Dual-pin layout reduces IR drop and improves high-current startup reliability from low-VIN sources |
| OUT (Pins 8, 9) | Regulated output node | Parallel pins lower effective ESR and support ≥1A continuous output with minimal thermal rise |
| HVLX / LVLX (Pins 5, 6, 7) | High/Low-side switch gate drivers | Integrated driver stages eliminate external gate resistors and reduce layout sensitivity to parasitic inductance |
| CAP (Pin 1) | Bypass capacitor for internal LDO | Requires 470nF ceramic to GND - stabilizes internal reference and prevents startup oscillation |
| GND (Pin 12) | Power and signal ground | Thermally enhanced pad ties to PCB ground plane - critical for EMI suppression and thermal dissipation |
| FAST/RSEL (Pin 2) | Configurable control pin | Factory-set as RSEL: resistor-programmed VOUT; enables fixed-function operation without firmware or I²C bus |
| EN (Pin 11) | Enable input | Active-high logic (1.4V threshold); supports system-level power sequencing and wake-on-event architectures |
| PGOOD (Pin 10) | Power-good status indicator | Open-drain output with 84.7% VOUT threshold and 2.25% hysteresis - enables reliable rail monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck/buck-boost/boost mode transition | Eliminates output voltage discontinuities and subharmonic content - removes need for post-regulation LDO in PPG systems |
| Dynamic Voltage Scaling (DVS) | Adjusts VOUT in real time to match LED current demand - cuts LED driver power loss by up to 40% during low-signal periods |
| Ultra-low 500mV minimum operating input | Extracts >92% of stored energy from supercapacitors - extends LPWAN node lifetime between charges |
| FAST pin pretriggered transient response | Reduces 700mA load step settling time by ≥67% - preserves ADC sampling window integrity in time-critical biosensing |
| I²C interface with interrupt-capable INT pin | Enables runtime configuration of VOUT, current limits, and fault reporting - supports OTA firmware updates in field-deployed devices |
Applications
| PPG Optical Heart Rate Monitoring | LPWAN Radio Power Supply |
|---|---|
Use Scenario: Wearable wristband measuring blood volume changes via green LED illumination and photodiode detection. IC Role / Device Role / Timing Role: Primary LED bias supply regulating 3.3V output with <150mV load transient deviation during 100ms LED pulses. Use Value: Enables 50µA LED drive current without ripple-induced AC coupling errors - improves SNR by 12dB over conventional regulators. |
Use Scenario: Cellular IoT node transmitting NB-IoT uplink bursts every 15 minutes using a 3.5V/700mA RF power amplifier. IC Role / Device Role / Timing Role: High-efficiency buck-boost stage buffering a 1F supercapacitor to deliver 3.5W peak power within 10ms. Use Value: Achieves 91% efficiency at 700mA burst while drawing from ≤1.9V input - extends supercapacitor recharge interval by 3.2×. |
| Industrial Wireless Sensor Node | Low-Power Biometric Authentication Module |
Use Scenario: Battery-powered temperature/humidity sensor transmitting data hourly via LoRaWAN gateway. IC Role / Device Role / Timing Role: Always-on 3.0V supply for MCU and sensor interface, entering ultra-low IQ sleep mode between transmissions. Use Value: 3.5µA quiescent current reduces annual self-discharge to <1.2% - enables 10-year CR2032 battery life. |
Use Scenario: Fingerprint sensor module in smart lock requiring rapid wake-up and consistent 2.8V LED illumination for image capture. IC Role / Device Role / Timing Role: Fast-response regulator enabling 20ms VOUT stabilization after EN assertion - meets 30ms system boot deadline. Use Value: FAST pin activation cuts settling time to 8.2ms - ensures full LED brightness before first pixel integration cycle. |
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 RSEL pin; requires I²C for VOUT programming; 2.5V–5.5V output range | Lacks seamless mode transition - exhibits 40mV ripple discontinuity at VIN = VOUT crossing point | Choose when I²C control is mandatory and system can tolerate higher light-load power loss |
| LT8330EDDB#TRMPBF | Fixed 3.3V/5V options only; 15µA IQ; no DVS or FAST pin; 2.8V–40V input range | No dynamic voltage scaling - forces constant LED bias voltage, increasing average power by 28% in PPG duty cycles | Choose for wide-input industrial sensors where programmability is secondary to input voltage range |
Compared with TPS63802DLAR and LT8330EDDB#TRMPBF, the MAX20343BEWE+ uniquely combines ultra-low IQ, resistor-programmed flexibility, and true seamless mode transitions - making it the only option capable of meeting both 10-year battery life and <10ms LED turn-on timing in compact optical biosensors.
Availability
MAX20343BEWE+ is available at Aetrix Electronics and suitable for biometric sensing, LPWAN radio power management, and industrial wireless sensor nodes requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for MAX20343BEWE+ 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 since 1965.
The MAX20343BEWE+ belongs to Analog Devices' ultra-low-power PMIC portfolio, engineered specifically for energy-constrained optical and cellular IoT endpoints where nanoscale quiescent current and noise-free regulation directly determine system-level battery life and measurement fidelity.
FAQ
What is the minimum input voltage required for MAX20343BEWE+ to start regulation?
The MAX20343BEWE+ starts regulation at 1.9V nominal input voltage. It continues operating down to 500mV input under light load conditions, enabling full energy extraction from supercapacitors and depleted primary cells. Startup behavior is verified across −40°C to +85°C and confirmed in Electrical Characteristics Table (VIN_START = 1.9V min).
Does MAX20343BEWE+ support dynamic voltage scaling (DVS) and how is it implemented?
Yes, MAX20343BEWE+ supports DVS via its I²C interface or RSEL pin. When configured for I²C control, register writes adjust VOUT in 50mV steps during operation; when RSEL-enabled, external resistor selection sets VOUT at power-up. DVS reduces LED driver losses by matching bias voltage to instantaneous current demand - validated in Typical Application Circuits (Optical Heart Rate LED Supply).
What package type and footprint does MAX20343BEWE+ use, and is thermal performance documented?
MAX20343BEWE+ uses a 12-pin FC2QFN package (2.50mm × 2.50mm, 0.5mm pitch) with exposed thermal pad. Its junction-to-ambient thermal resistance is 58.7°C/W on a 4-layer board (JEDEC JESD51-7 compliant), and maximum power dissipation is 1363.2mW at +70°C ambient. Package drawings and land patterns are published under Outline Number 21-100331.
How does the FAST pin improve load transient response in MAX20343BEWE+?
The FAST pin on MAX20343BEWE+ pretriggers the control loop's switching activity before a load step occurs, reducing output voltage deviation by up to 67%. When asserted high, it increases quiescent current to 35µA but cuts 700mA transient settling time from 24.5ms to 8.2ms - critical for maintaining ADC reference stability during LED pulsing in PPG systems.
Can MAX20343BEWE+ be used without an I²C controller, and what configuration options exist?
Yes, MAX20343BEWE+ supports single-pin-enabled operation via the RSEL pin. A resistor from RSEL to GND sets VOUT per Table 1 (RSEL SELECTION TABLE), eliminating firmware dependency. Factory configuration determines whether Pin 2 functions as FAST or RSEL - MAX20343BEWE+ is shipped with RSEL functionality enabled per ordering code BEWE+.
MAX20343BEWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFBGA, WLBGA
- Packaging:
- Strip
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLP (1.77x2.01)
MAX20343BEWE+ FAQ
1.How can I place an order for MAX20343BEWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20343BEWE+ 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+ reliable?
The price and inventory of MAX20343BEWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20343BEWE+ is usually 5 days.
3.What payment methods are accepted for MAX20343BEWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20343BEWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20343BEWE+?
MAX20343BEWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20343BEWE+ 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+?
For technical support, including MAX20343BEWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20343BEWE+ requirements.
6.How does Aetrix verify that MAX20343BEWE+ is sourced from the original manufacturer or authorized distributors?
All MAX20343BEWE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX20343BEWE+?
All MAX20343BEWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20343BEWE+, 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+ part is unused and in its original packaging.
Return procedure for MAX20343BEWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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