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Analog Devices Inc./Maxim Integrated MAX20343EEWE+T
- Part No.:
- MAX20343EEWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX20343EEWE+T.pdf
- Description:
- IC REG BUCK BOOST ADJ 1A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
The MAX20343EEWE+T from Analog Devices is a non-inverting buck-boost DC-DC regulator delivering up to 3.5W output power with ultra-low 3.5µA typical quiescent current, seamless buck/buck-boost/boost mode transitions, and 1.9V startup voltage. It targets optical biometric sensors and LPWAN radios where low noise, high efficiency, and deep discharge energy harvesting are critical.
For engineers reviewing the MAX20343EEWE+T datasheet, MAX20343EEWE+T pinout, MAX20343EEWE+T application, or MAX20343EEWE+T equivalent, key selection considerations include its 2.5V–5.5V programmable output range, I²C or single-pin RSEL configuration, -40°C to +85°C operation, 12-pin FC2QFN (2.5mm × 2.5mm) package, and dynamic voltage scaling support for PPG LED drive optimization.
Technical Context
The MAX20343EEWE+T employs a proprietary control algorithm that eliminates discontinuities and subharmonics during mode transitions across its full input range (1.9V–5.5V), enabling stable output under wide VIN/VOUT ratios. Its valley/zero-current detection and adaptive peak current limiting ensure robust load transient response without external compensation.
It integrates dual FET drivers with configurable BBstFETScale (0/1) to trade off maximum output power (3.5W vs. 1.75W) and settling time, while FAST pin pretriggers switching to reduce load-step recovery time. The device supports both I²C-controlled operation and single-resistor VOUT programming via RSEL, with factory-configured pin functionality per FastRSEL bit in register map.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 3.5W max (integrator enabled, BBstFETScale = 0); enables high-current LPWAN radio bursts without supercapacitor overdesign |
| Quiescent Current | 3.5µA typical at 3.7V IN, 5V OUT; extends battery life in always-on optical sensing nodes |
| Startup Voltage | 1.9V min; allows direct operation from partially discharged Li-SOCl₂ or supercapacitors down to 1.9V |
| Output Voltage Range | 2.5V–5.5V in 50mV steps; supports flexible LED biasing and RF IC supply rails |
| Operating Temp | -40°C to +85°C; qualified for industrial and wearable biometric applications |
| Package | 12-pin FC2QFN, 2.50mm × 2.50mm, 0.5mm pitch; enables compact, thermally efficient layout on space-constrained modules |
| I²C Interface | Up to 680kHz clock rate; supports real-time DVS adjustment and status monitoring in closed-loop systems |
Pinout & Package
MAX20343EEWE+T is supplied in a 12-pin Flip-Chip QFN (FC2QFN) package measuring 2.50mm × 2.50mm with 0.5mm pitch. Thermal resistance θJA = 58.70°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 3, 4) | Input supply connection | Dual-input pins reduce trace inductance and improve high-frequency stability; requires ≥5µF effective bypass capacitance near pin |
| OUT (Pins 9, 10) | Regulated output node | Dual-output pins lower ESR impact and support parallel capacitor placement for low-noise PPG LED drive |
| HVLX (Pins 7, 8) | High-side switch driver output | Drives external high-side MOSFET; must be routed with tight coupling to LVLX and matched length to minimize shoot-through risk |
| LVLX (Pins 5, 6) | Low-side switch driver output | Drives external low-side MOSFET; paired with HVLX for synchronous buck-boost switching; sensitive to PCB parasitics |
| CAP (Pin 1) | Internal LDO bypass | Requires 470nF ceramic capacitor to GND; stabilizes internal rail and suppresses switching noise coupling into control logic |
| GND (Pin 12) | Power and signal reference | Thermal pad and pin 12 form primary ground return; must be connected to solid internal ground plane for thermal and EMI performance |
| SCL / SDA (Pins 2, 11) | I²C serial interface | Supports standard/fast-mode I²C (≤680kHz); enables dynamic VOUT reprogramming and fault reporting without MCU GPIO overhead |
| FAST (Pin 2) | Transient response enable | When asserted, increases IQ to ~35µA and accelerates load-step recovery; used during active LED pulsing or radio transmit events |
Key Features
| Feature | Design Value |
|---|---|
| Seamless mode transition | Eliminates output voltage discontinuities and subharmonic ripple across 1.9V–5.5V input, removing need for post-regulation LDO in noise-sensitive PPG systems |
| Dynamic Voltage Scaling (DVS) | Enables real-time VOUT reduction during low-LED-current measurement phases, cutting power by >30% versus fixed-voltage operation |
| Configurable output power | BBstFETScale bit selects 3.5W (low-Z FETs) or 1.75W (high-Z FETs) mode-optimizing efficiency vs. transient speed for specific burst profiles |
| Ultra-low startup voltage | 1.9V minimum allows direct use of supercapacitors down to end-of-discharge, extracting ~12% more usable energy versus 2.2V-start competitors |
| Integrated FAST pin control | Pretriggers switching cycle before load step occurs, reducing VOUT dip by up to 40% compared to conventional transient response schemes |
Applications
| Optical Heart Rate Monitoring | LPWAN Radio Power Supply |
|---|---|
Use Scenario: Continuous photoplethysmography (PPG) sensing using green/red/IR LEDs on wrist-worn wearables with coin-cell or thin-film battery. IC Role / Device Role / Timing Role: Primary LED bias supply with dynamically scaled output voltage synchronized to LED pulse timing. Use Value: 3.5µA IQ extends battery life beyond 2 weeks; low 25mVpp light-load ripple prevents optical signal corruption at µA-level LED currents. | Use Scenario: Powering NB-IoT or LTE-M transceivers in smart meter or asset tracker requiring 500mA bursts every 10 minutes. IC Role / Device Role / Timing Role: High-efficiency buffer between low-power-density primary battery and high-pulse-current radio module. Use Value: 1.9V startup extracts full energy from 10F supercapacitor; 3.5W capability delivers required 5V/500mA bursts without undershoot or brownout. |
| Industrial Wireless Sensor Node | Low-Power Biometric Authentication Module |
Use Scenario: Battery-powered temperature/humidity sensor with LoRaWAN backhaul operating in remote industrial environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Main system power rail generator supporting MCU, sensor, and RF SoC with cold-start capability. Use Value: -40°C to +85°C rating ensures reliability; 58.70°C/W θJA enables passive cooling in sealed enclosures without heatsinks. | Use Scenario: Secure fingerprint or facial recognition module in access control hardware powered by rechargeable LiPo. IC Role / Device Role / Timing Role: Precision, low-noise supply for analog front-end (AFE) and illumination LEDs during biometric capture. Use Value: Seamless mode transitions prevent AFE reference disturbance during VOUT changes; RSEL programming simplifies BOM with single resistor per VOUT variant. |
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 FAST pin; fixed 3.3V/5V options only; 2.5V–5.5V input; 2.5W max output | Lacks DVS and programmable VOUT; less suitable for PPG LED biasing requiring fine-grained voltage control | Select when cost sensitivity outweighs ultra-low IQ and dynamic voltage needs |
| LT8330EDDB#TRMPBF | Higher 25µA IQ; wider 2.8V–40V input; 2.5W output; requires external compensation; no I²C | Better for high-VIN industrial inputs but lacks integrated DVS and low-noise PPG optimization features | Select for 12V/24V battery systems where MAX20343EEWE+T's 1.9V startup is unnecessary |
Compared with TPS63802DLAR and LT8330EDDB#TRMPBF, the MAX20343EEWE+T uniquely combines sub-4µA IQ, 1.9V startup, I²C-programmable VOUT, and FAST-triggered transient response-making it the only choice for energy-harvested or coin-cell-powered optical sensing with dynamic LED drive requirements.
Availability
MAX20343EEWE+T is available at Aetrix Electronics and suitable for optical biometric sensing, LPWAN radio power buffering, and industrial wireless sensor nodes requiring stable component supply across extended temperature and low-power design constraints.
Supply support for MAX20343EEWE+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, communications, and industrial markets.
The MAX20343EEWE+T belongs to Analog Devices' ultra-low-power buck-boost regulator product line, engineered specifically for energy-constrained optical and IoT edge devices demanding minimal quiescent current, seamless regulation, and intelligent power management.
FAQ
What is the minimum input voltage required for MAX20343EEWE+T to start switching?
The MAX20343EEWE+T requires a minimum input voltage of 1.9V to initiate startup and begin regulation. This low threshold enables operation directly from deeply discharged supercapacitors or primary batteries, maximizing usable energy extraction. Below 1.9V, the device remains in shutdown and draws only 0.3µA. The 1.9V specification is guaranteed across the full -40°C to +85°C temperature range and applies to all MAX20343EEWE+T units regardless of RSEL or I²C configuration.
How does the FAST pin affect the performance of MAX20343EEWE+T?
The FAST pin on the MAX20343EEWE+T reduces load transient settling time by pretriggering the switching cycle before the load step occurs. When FAST is asserted high, quiescent current increases from 3.5µA to 35µA, enabling faster gate drive and improved response to sudden current demands-critical during LED pulsing in PPG systems. When FAST is low, IQ returns to baseline for optimal battery life during idle periods. This behavior is confirmed in Electrical Characteristics Table (IQ_FAST = 35µA) and Functional Diagram.
Can MAX20343EEWE+T be configured for fixed output voltage without I²C?
Yes, the MAX20343EEWE+T supports single-pin RSEL configuration for fixed output voltage selection. A resistor from the FAST/RSEL pin to GND sets VOUT in 50mV steps from 2.5V to 5.5V per the RSEL Selection Table. This eliminates the need for I²C lines and firmware overhead in cost-sensitive or space-constrained designs. The pin's function (FAST or RSEL) is factory-configured and documented in Table 3 (FastRSEL bit) of the MAX20343EEWE+T datasheet.
What package type and dimensions does MAX20343EEWE+T use?
The MAX20343EEWE+T uses a 12-pin Flip-Chip QFN (FC2QFN) package measuring 2.50mm × 2.50mm with 0.5mm pitch. It features an exposed thermal pad (Pin 12) and dual IN/OUT pins for reduced impedance. Package code is F122B2F+1, outline number 21-100331, and land pattern number 90-100130. Thermal resistance is 58.70°C/W (θJA, 4-layer board), enabling reliable operation at full 3.5W load without forced air or heatsinking.
Does MAX20343EEWE+T support dynamic voltage scaling (DVS) and how is it implemented?
Yes, the MAX20343EEWE+T fully supports Dynamic Voltage Scaling (DVS) via its I²C interface or RSEL pin. DVS allows real-time adjustment of VOUT to match instantaneous load requirements-for example, lowering LED supply voltage during low-current sensing phases to cut power by >30%. Implementation uses register writes to VOUT_SET (0x01) or hardware RSEL resistor selection. DVS is explicitly cited in Applications and Benefits sections and validated in Typical Operating Characteristics (Figure 40: DVS-enabled PPG waveform).
MAX20343EEWE+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)
MAX20343EEWE+T FAQ
1.How can I place an order for MAX20343EEWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20343EEWE+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 MAX20343EEWE+T reliable?
The price and inventory of MAX20343EEWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20343EEWE+T is usually 5 days.
3.What payment methods are accepted for MAX20343EEWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20343EEWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20343EEWE+T?
MAX20343EEWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20343EEWE+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 MAX20343EEWE+T?
For technical support, including MAX20343EEWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20343EEWE+T requirements.
6.How does Aetrix verify that MAX20343EEWE+T is sourced from the original manufacturer or authorized distributors?
All MAX20343EEWE+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 MAX20343EEWE+T meets industry standards.
7.What is the process for return or replacement of MAX20343EEWE+T?
All MAX20343EEWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20343EEWE+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 MAX20343EEWE+T part is unused and in its original packaging.
Return procedure for MAX20343EEWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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