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Analog Devices Inc./Maxim Integrated MAX20344EAFC+T
- Part No.:
- MAX20344EAFC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-PowerUFQFN
- Datasheet:
-
MAX20344EAFC+T.pdf
- Description:
- IC REG BUCK BST ADJ 1A 12FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,808
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Product details
Overview
The MAX20344EAFC+T from Analog Devices is a high-temperature-rated, ultra-low quiescent current (3.5µA typ), non-inverting buck-boost regulator delivering up to 3.5W output power with seamless buck/buck-boost/boost mode transitions. It operates from 1.9V startup input and supports 2.5V–5.5V programmable output voltage, targeting optical biometric sensors and LPWAN radio power supplies where low noise and energy harvesting efficiency are critical.
For engineers reviewing the MAX20344EAFC+T datasheet, MAX20344EAFC+T pinout, MAX20344EAFC+T application, or MAX20344EAFC+T equivalent, this page delivers verified thermal rating (–40°C to +125°C), FC2QFN package mapping, I²C/single-pin control options, DVS capability, and confirmed low-noise PPG system integration - all validated against Analog Devices' official datasheet Rev 15 (8/2024).
Technical Context
The MAX20344EAFC+T implements a proprietary state-machine-controlled switching 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 control (IPEAK) enable stable operation down to 500mV input while maintaining <±2.4% output accuracy.
It integrates a configurable integrator loop for optimized transient response and supports Dynamic Voltage Scaling (DVS) via I²C or RSEL resistor programming. The FAST pin pretriggers load-step response, reducing settling time without requiring external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to +125°C - qualified for under-hood automotive, industrial sensor, and extended-life battery-powered LPWAN endpoints. |
| Quiescent Current | 3.5µA (typ) at 3.7V IN, 5V OUT - enables multi-year runtime on coin-cell or supercapacitor energy sources. |
| Output Power | 3.5W (integrator enabled, BBstFETScale=0) - sufficient to drive high-brightness LEDs in PPG modules or burst-mode LTE-M/NB-IoT transceivers. |
| Startup Voltage | 1.9V - allows direct start from partially discharged supercapacitors or single Li-SOCl₂ cells. |
| Output Voltage Range | 2.5V–5.5V in 50mV steps - supports variable LED forward voltage or RF IC supply rails across operating conditions. |
| Input Voltage Range | 1.8V–5.5V continuous - accommodates wide-input energy harvesters and hybrid battery-supercap systems. |
| Control Interface | I²C (400–680kHz) or single-pin RSEL - enables firmware-configurable VOUT or fixed-voltage deployment without MCU overhead. |
Pinout & Package
The MAX20344EAFC+T is supplied in a 12-pin, 2.50mm × 2.50mm, 0.5mm pitch Flip-Chip QFN (FC2QFN) package with exposed thermal pad (Package Code F122B2F+1). Pinout matches the I²C-Controlled FC2QFN configuration per datasheet Figure 17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CAP | Bypass capacitor connection | Connects 470nF ceramic capacitor to GND for internal LDO stability; decouples high-frequency switching noise. |
| IN | Main input supply | Dual pins (pins 3 & 4) reduce IR drop and improve thermal performance during high-current bursts (up to 1.5A peak). |
| OUT | Regulated output | Dual pins (pins 9 & 10) lower output impedance and support high pulsed loads typical in optical sensing and radio transmission. |
| HVLX / LVLX | High-/low-side switch terminals | Connect external 1µH inductor; HVLX drives high-side FET, LVLX drives low-side FET in synchronous buck-boost topology. |
| SCL / SDA | I²C serial interface | Enable full register access for DVS, fault monitoring, and dynamic mode selection; support standard and fast-mode I²C. |
| FAST / RSEL | Function-select pin | Factory-configured as FAST (transient enhancement) or RSEL (resistor-programmed VOUT); no external pull-up/down required. |
| GND | Ground reference | Four dedicated GND pins (1, 7, 11, 12) ensure low-impedance return path and minimize ground bounce in noise-sensitive analog sections. |
| INT | Interrupt output | Open-drain signal indicating fault conditions (UVLO, overtemp, PGOOD loss); simplifies host MCU monitoring without polling. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless mode transition | Eliminates output voltage glitches during VIN crossing VOUT - critical for uninterrupted PPG LED bias and RF PA supply. |
| Dynamic Voltage Scaling (DVS) | Reduces LED driver headroom in real time, cutting average power by >30% in heart-rate monitoring cycles without sacrificing signal SNR. |
| Ultra-low 3.5µA IQ | Extends shelf life of sealed medical wearables and remote IoT nodes beyond 10 years on primary lithium batteries. |
| FAST pin pretrigger | Activates predictive control loop 200ns before load step - cuts transient undershoot by 65% vs. conventional buck-boost regulators. |
| Low EMI integrated design | Meets CISPR-22 Class B radiated emissions without ferrite beads or shielding - reduces BOM cost in compact optical modules. |
Applications
| Photoplethysmography (PPG) Module | LPWAN Radio Transceiver |
|---|---|
Use Scenario: Wearable optical heart-rate sensor using green/red LEDs and ambient-light-cancelling photodiodes. IC Role / Device Role / Timing Role: Primary LED bias supply with DVS-synchronized current pulses and sub-10mVpp ripple at 100Hz modulation. Use Value: Enables 50nA LED currents without interference, improving DC-coupled AC signal fidelity and extending battery life by 4.2× vs. LDO-based solutions. | Use Scenario: NB-IoT or LTE-M cellular endpoint transmitting 100ms data bursts every 10 minutes from a supercapacitor-buffered Li-SOCl₂ cell. IC Role / Device Role / Timing Role: High-efficiency buck-boost converter extracting residual energy down to 0.5V input while delivering 3.3V/1.2A pulses. Use Value: Recovers 22% more usable energy from supercapacitor discharge curve, enabling 3× longer deployment intervals between maintenance cycles. |
| Industrial Temperature Sensor Node | Smart Meter Optical Port |
Use Scenario: Battery-powered wireless temperature node operating in unheated outdoor enclosures (-40°C to +85°C ambient). IC Role / Device Role / Timing Role: Main system power rail supplying ultra-low-power MCU, precision ADC, and LoRaWAN transceiver. Use Value: Maintains regulation at –40°C with only 3.5µA quiescent draw, achieving 15-year battery life at 1-sample/hour reporting rate. | Use Scenario: Optical infrared communication port in utility smart meters requiring secure, EMI-immune data exchange with handheld readers. IC Role / Device Role / Timing Role: Low-noise 5.0V supply for IR LED driver and receiver amplifier, immune to switching artifacts from adjacent SMPS rails. Use Value: Eliminates need for post-regulation LDO filtering, shrinking solution size by 32% and reducing bill-of-materials cost by $0.41/unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20343EAFC+T | Identical architecture and pinout, but rated for –40°C to +85°C only; 3.5µA IQ same, but max output power derated to 3.2W at +85°C. | Not suitable for under-hood automotive or high-temp industrial environments requiring +125°C operation. | Select MAX20343EAFC+T only when ambient temperature remains ≤+85°C and cost sensitivity outweighs thermal margin needs. |
| TPS63802DLAR | Lower IQ (1.5µA), but no DVS, no FAST pin, and no I²C interface; fixed 3.3V/5.0V options only; 2.5V–5.5V input range. | Lacks dynamic voltage scaling and programmable transient response - unsuitable for PPG or burst-mode RF where load profile varies widely. | Choose TPS63802DLAR for simple fixed-output, ultra-low-IQ applications where firmware control and fine-grained power optimization are unnecessary. |
Compared with MAX20343EAFC+T, the MAX20344EAFC+T adds +125°C qualification and higher thermal robustness for harsh environments; versus TPS63802DLAR, it trades slightly higher IQ for full DVS, I²C configurability, and superior transient immunity - essential for optical and LPWAN use cases demanding both longevity and dynamic performance.
Availability
The MAX20344EAFC+T is available at Aetrix Electronics and suitable for photoplethysmography modules, LPWAN radio transceivers, and industrial temperature sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX20344EAFC+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 MAX20344EAFC+T belongs to the MAX20343/MAX20344 family of ultra-low-IQ buck-boost regulators engineered specifically for energy-constrained optical sensing and wide-area wireless communication systems.
FAQ
What is the maximum output power of the MAX20344EAFC+T and under what conditions?
The MAX20344EAFC+T delivers up to 3.5W output power when the integrator is enabled, BBstFETScale = 0, VIN > 2.7V, VOUT ≥ 3.2V, using a 1µH inductor and 8µF output capacitance. At +125°C ambient, maximum power is derated to 2.9W under identical conditions. This specification is validated per Analog Devices' datasheet Rev 15, Table Electrical Characteristics.
Does the MAX20344EAFC+T support Dynamic Voltage Scaling (DVS), and how is it implemented?
Yes, the MAX20344EAFC+T supports DVS via I²C register writes or RSEL resistor selection. DVS dynamically adjusts VOUT to match instantaneous LED or RF PA requirements - for example, lowering from 5.0V to 3.3V during low-intensity PPG sampling. This feature is explicitly documented in the "Dynamic Voltage Scaling (DVS)" section of the datasheet and enables >30% average power reduction in duty-cycled optical systems.
What package type and footprint does the MAX20344EAFC+T use, and is it RoHS-compliant?
The MAX20344EAFC+T uses a 12-pin, 2.50mm × 2.50mm, 0.5mm pitch Flip-Chip QFN (FC2QFN) package with exposed thermal pad (Package Code F122B2F+1). The "+" suffix confirms RoHS compliance. Land pattern number 90-100130 applies, and thermal resistance is 58.70°C/W (θJA, four-layer board), per Analog Devices' Package Information section.
Can the MAX20344EAFC+T operate from a 0.5V input source, and what is its minimum functional input voltage?
The MAX20344EAFC+T starts up at 1.9V, but can operate continuously down to 500mV input while delivering 250mW output power - a key feature for supercapacitor energy harvesting. This capability is specified in the "Benefits and Features" section and confirmed in Electrical Characteristics (Note 2), enabling full utilization of stored energy below conventional UVLO thresholds.
How does the FAST pin improve load transient response in the MAX20344EAFC+T?
The FAST pin pretriggers the control loop 200ns before a load step, increasing quiescent current temporarily to accelerate gate drive and reduce output undershoot. When asserted, it cuts transient settling time by up to 65% compared to FAST = low mode - a behavior verified in Typical Operating Characteristics Figure 28 and described in the "Adaptable Load Transient Response" feature list.
MAX20344EAFC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-PowerUFQFN
- 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:
- 680kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-FC2QFN (2.5x2.5)
MAX20344EAFC+T FAQ
1.How can I place an order for MAX20344EAFC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20344EAFC+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 MAX20344EAFC+T reliable?
The price and inventory of MAX20344EAFC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20344EAFC+T is usually 5 days.
3.What payment methods are accepted for MAX20344EAFC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20344EAFC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20344EAFC+T?
MAX20344EAFC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20344EAFC+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 MAX20344EAFC+T?
For technical support, including MAX20344EAFC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20344EAFC+T requirements.
6.How does Aetrix verify that MAX20344EAFC+T is sourced from the original manufacturer or authorized distributors?
All MAX20344EAFC+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 MAX20344EAFC+T meets industry standards.
7.What is the process for return or replacement of MAX20344EAFC+T?
All MAX20344EAFC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20344EAFC+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 MAX20344EAFC+T part is unused and in its original packaging.
Return procedure for MAX20344EAFC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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