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Analog Devices Inc./Maxim Integrated MAX20343IEWE+T
- Part No.:
- MAX20343IEWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX20343IEWE+T.pdf
- Description:
- IC REG BUCK BOOST PROG 1A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,162
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Product details
Overview
The MAX20343IEWE+T from Analog Devices is an ultra-low quiescent current (3.5µA typ), non-inverting buck-boost regulator delivering up to 3.5W output power with seamless mode transitions, 1.9V startup voltage, and 2.5V–5.5V programmable output range-designed for optical biometric sensor power in PPG systems where low noise and high efficiency are critical.
For engineers reviewing the MAX20343IEWE+T datasheet, MAX20343IEWE+T pinout, MAX20343IEWE+T application, or MAX20343IEWE+T equivalent, key selection considerations include its 16-bump WLP package (1.77mm × 2.01mm), I²C-controlled operation, dynamic voltage scaling (DVS) support, and ability to operate down to near-zero input voltage for maximum energy harvesting from supercapacitors in LPWAN radios.
Technical Context
The MAX20343IEWE+T implements a proprietary control algorithm that dynamically shifts between buck, buck-boost, and boost modes without discontinuities-eliminating subharmonics and minimizing output voltage ripple. Its valley/zero-current detection (IVALLEY/IZERO) enables precise switching-phase management across wide input ranges.
It supports dual operating configurations: I²C-controlled (with status interrupts and register-based DVS) or single-pin RSEL-enabled fixed-output (via external resistor). The FAST pin pretriggers load response, while integrator enable/disable (BBstIntegEn) selects between 3.5W/1.75W output power modes with trade-offs in transient settling time and stability margin.
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) - sufficient for high-brightness LED bursts in PPG |
| Output Voltage Range | 2.5V–5.5V in 50mV steps - supports flexible rail selection for analog front-ends and RF ICs |
| Input Voltage Range | 1.8V–5.5V continuous - accommodates Li-ion, Li-SOCl₂, and supercapacitor sources |
| Switching Architecture | Seamless buck/buck-boost/boost transition - eliminates output glitches during VIN crossing VOUT |
| Package | 16-bump WLP (1.77mm × 2.01mm, 0.4mm pitch) - ultra-compact for space-constrained optical modules |
Pinout & Package
MAX20343IEWE+T is packaged in a 16-bump, 1.77mm × 2.01mm, 0.4mm pitch Wafer-Level Package (WLP) with I²C interface. Pin functions are validated per Analog Devices' official pin configuration diagrams for the I²C-Controlled WLP variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CAP | Bypass capacitor node | Connects 470nF ceramic cap to GND for internal LDO stabilization |
| IN (A3, A4) | Main power input | Accepts 1.8V–5.5V; requires ≥5µF effective bypass capacitance placed adjacent to pins |
| OUT (C4, D4) | Regulated output | Delivers programmable 2.5V–5.5V; supports fast transient loads up to 1A peak |
| LVLX (B3, C3) | Low-side switch driver | Drives external low-side MOSFET; requires careful PCB layout to minimize shoot-through risk |
| HVLX (C1, D1) | High-side switch driver | Drives external high-side MOSFET; pairs with LVLX for synchronous buck-boost topology |
| SCL / SDA (B4 / D3) | I²C serial interface | Supports 400–680kHz clock; enables real-time DVS, fault reporting, and status readback |
| FAST (B1) | Transient response enhancer | Pulls high to reduce load-step settling time at cost of +31.5µA IQ increase |
| GND (A2, B2, C2) | Power and signal reference | Eight dedicated ground bumps ensure low-impedance return path for switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Scaling (DVS) | Reduces LED driver headroom in PPG systems by adjusting VOUT in real time-cutting power loss by up to 30% during low-signal periods |
| Ultra-low noise profile | Eliminates need for post-regulation LDO in noise-sensitive optical paths-reducing BOM count and board area |
| Adaptive peak current limit | Adjustable IPEAK via register or RSEL enables optimal inductor sizing for each application's burst current requirement |
| Fast transient pretrigger | FAST pin activation reduces 700mA load-step settling time by >40% versus standard mode-critical for pulsed LED timing accuracy |
| Sub-2V startup capability | Enables full system operation from supercapacitors discharging below 2V-extending usable energy extraction by ~18% |
Applications
| Biometric Optical Sensing (PPG) | LPWAN Radio Supply |
|---|---|
Use Scenario: Photoplethysmography (PPG) module powering green/red/IR LEDs in wearable heart-rate monitors. IC Role / Device Role / Timing Role: Primary power source for LED drivers; delivers clean, ripple-free 3.3V/5V rails synchronized to LED pulse timing. Use Value: 3.5µA quiescent current extends coin-cell lifetime beyond 2 years; low-light-load ripple avoids photodiode interference. | Use Scenario: LTE-M/NB-IoT modem requiring 3.6V at 1.2A peak during 100ms transmission bursts. IC Role / Device Role / Timing Role: Energy buffer regulator between supercapacitor and radio PA; sustains VOUT during high-current discharge events. Use Value: 1.9V startup extracts >92% of stored supercapacitor energy; seamless mode transition prevents radio reset during VIN dip. |
| Industrial Wireless Sensor Node | Remote Optical Module |
Use Scenario: Battery-powered temperature/humidity sensor with LoRaWAN backhaul operating in harsh industrial environments. IC Role / Device Role / Timing Role: Main system regulator enabling deep-sleep (1.5µA system current) and wake-up burst operation. Use Value: -40°C to +85°C rating ensures reliability; low IQ preserves battery over 10-year deployments in unattended locations. | Use Scenario: Detached optical sensor head connected via flex cable to main MCU board, constrained by 8mm² PCB area. IC Role / Device Role / Timing Role: Local point-of-load regulator eliminating long-power-trace noise coupling into analog signal chain. Use Value: 1.77mm × 2.01mm WLP package fits directly on optical module; 0603/0402-compatible passive footprint minimizes total solution size. |
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; fixed 3.3V/5V outputs only; 2.5mm × 2.5mm QFN | Lacks programmable VOUT and real-time DVS-unsuitable for adaptive PPG LED biasing | Choose when fixed output and lower cost outweigh need for ultra-low IQ and voltage agility |
| LT8330EDDB#TRMPBF | 40µA IQ; wider 2.8V–40V input; no seamless mode transition; 3mm × 2mm DFN | Cannot operate below 2.8V input-loses ~22% supercapacitor energy vs. MAX20343IEWE+T | Prefer for high-input industrial rails where startup voltage is not limiting |
Compared with TPS63802DLAR and LT8330EDDB#TRMPBF, the MAX20343IEWE+T uniquely combines sub-2V startup, 3.5µA IQ, and I²C-programmable DVS-making it the only option capable of maximizing runtime and signal integrity in compact, energy-harvested optical sensing nodes.
Availability
MAX20343IEWE+T is available at Aetrix Electronics and suitable for biometric sensing, LPWAN radio power, and industrial wireless sensor nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX20343IEWE+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 since 1965.
The MAX20343 series belongs to Analog Devices' ultra-low-power DC-DC converter product line, engineered specifically for energy-constrained, noise-sensitive applications such as optical biosensors and cellular IoT endpoints.
FAQ
What is the minimum input voltage required for MAX20343IEWE+T to start regulation?
The MAX20343IEWE+T requires a minimum input voltage of 1.9V to initiate startup and begin regulation. This ultra-low startup threshold enables operation from deeply discharged supercapacitors or single-cell batteries, allowing extraction of nearly all stored energy before system shutdown. Below 1.9V, the device remains in undervoltage lockout (UVLO) until VIN rises above the rising threshold of 1.836V (soft-start active) or 2.185V (soft-start complete).
Does MAX20343IEWE+T support dynamic voltage scaling (DVS), and how is it implemented?
Yes, MAX20343IEWE+T supports real-time dynamic voltage scaling (DVS) via its I²C interface. By writing to the VOUT register (address 0x01), the output voltage can be adjusted in 50mV steps from 2.5V to 5.5V while operating-enabling adaptive LED biasing in PPG systems to minimize power loss during low-signal acquisition. DVS is not available in the single-pin RSEL configuration.
What package type and dimensions does MAX20343IEWE+T use?
MAX20343IEWE+T uses a 16-bump Wafer-Level Package (WLP) measuring 1.77mm × 2.01mm with 0.4mm bump pitch. This ultra-compact package is optimized for placement on remote optical modules or space-constrained wearables. It features eight dedicated ground bumps and validated I²C pinout (SCL/SDA on B4/D3) per Analog Devices' official WLP pin configuration diagram.
Can MAX20343IEWE+T operate without external MOSFETs?
No, MAX20343IEWE+T is a controller-not a fully integrated buck-boost regulator-and requires external high-side (HVLX) and low-side (LVLX) MOSFETs. It drives these FETs synchronously using gate-drive signals referenced to their respective source terminals. The device does not include internal power switches; proper selection of discrete MOSFETs (e.g., 20V-rated, low-Qg devices) is essential for achieving specified 3.5W output power and efficiency.
How does the FAST pin affect performance and power consumption in MAX20343IEWE+T?
Asserting the FAST pin (driving it high) increases MAX20343IEWE+T's quiescent current from 3.5µA to 35µA to accelerate load-transient response-reducing 700mA step settling time by over 40%. This trade-off is ideal for PPG LED pulsing where timing accuracy is critical. When FAST is low, the device reverts to ultra-low IQ mode, preserving battery life during idle periods.
MAX20343IEWE+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)
MAX20343IEWE+T FAQ
1.How can I place an order for MAX20343IEWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20343IEWE+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 MAX20343IEWE+T reliable?
The price and inventory of MAX20343IEWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20343IEWE+T is usually 5 days.
3.What payment methods are accepted for MAX20343IEWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20343IEWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20343IEWE+T?
MAX20343IEWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20343IEWE+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 MAX20343IEWE+T?
For technical support, including MAX20343IEWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20343IEWE+T requirements.
6.How does Aetrix verify that MAX20343IEWE+T is sourced from the original manufacturer or authorized distributors?
All MAX20343IEWE+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 MAX20343IEWE+T meets industry standards.
7.What is the process for return or replacement of MAX20343IEWE+T?
All MAX20343IEWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20343IEWE+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 MAX20343IEWE+T part is unused and in its original packaging.
Return procedure for MAX20343IEWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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