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Analog Devices Inc./Maxim Integrated MAX17625ATA+T
- Part No.:
- MAX17625ATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX17625ATA+T.pdf
- Description:
- IC REG BUCK ADJ 700MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,488
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Product details
Overview
MAX17625ATA+T from Analog Devices is a synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, operating from 2.7V to 5.5V input and delivering up to 700mA output current at adjustable 0.8V–1.5V. It features fixed 2MHz switching frequency, ±1% feedback voltage accuracy, and 100% duty-cycle capability for extended battery runtime in space-constrained industrial power rails.
For engineers reviewing the MAX17625ATA+T datasheet, MAX17625ATA+T pinout, MAX17625ATA+T application, or MAX17625ATA+T equivalent, this page delivers verified electrical parameters, validated thermal performance (−40°C to +125°C ambient), confirmed TDFN-8 (2mm × 2mm) package mapping, and real-world design guidance for prebiased startup, PFM/PWM mode selection, and ceramic-capacitor-only implementation.
Technical Context
The MAX17625ATA+T employs peak-current-mode control with internal slope compensation and fixed-frequency operation at 2MHz. Its control architecture integrates soft-start ramping (1ms typ), internal error amplifier referenced to 0.8V, and cycle-by-cycle overcurrent protection triggered at 1.46A (typ) peak inductor current.
It supports both PWM and PFM modes via MODE pin latching at power-up: grounded MODE enables forced-PWM for fixed-frequency operation across all loads; open MODE enables PFM for pulse-skipping and higher light-load efficiency. The device also implements undervoltage lockout (2.6V typ UVLO threshold with 200mV hysteresis) and thermal shutdown at +165°C (10°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, and industrial 3.3V/5V rails without external LDO pre-regulation. |
| Output Voltage Range | 0.8V to 1.5V - programmable via external resistor divider; optimized for core logic, I/O, and sensor supply in microcontrollers and FPGA I/O banks. |
| Max Output Current | 700mA - sufficient for powering multiple low-power peripherals or single-core embedded processors under full load. |
| Switching Frequency | 2MHz (fixed) - enables use of compact 1.5µH inductors and small ceramic capacitors, reducing solution footprint. |
| Feedback Accuracy | ±1% - ensures tight regulation tolerance critical for voltage-sensitive analog circuits and precision ADC references. |
| Shutdown Current | 0.1μA (typ) - minimizes battery drain in always-on systems requiring ultra-low quiescent power during sleep states. |
| Operating Temperature | −40°C to +125°C ambient - qualified for factory automation, motor control, and automotive under-hood auxiliary supplies. |
Pinout & Package
Package: 8-pin TDFN (2mm × 2mm), exposed pad (EP), RoHS-compliant, thermal resistance θJA = 85.3°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. IN | Power input supply rail | Accepts 2.7V–5.5V; requires local 2.2µF ceramic decoupling capacitor placed adjacent to pin for EMI suppression and transient response. |
| 2. GND | Power ground reference | Primary return path for input/output currents; must connect directly to large copper ground plane with multiple thermal vias to EP. |
| 3. EN | Enable control input | Logic-high ≥2V enables regulation; logic-low ≤0.8V disables converter and reduces IN current to 0.1μA (typ). |
| 4. MODE | Operation mode select | Ground = forced-PWM (fixed 2MHz); open = PFM (pulse-skipping at light loads); latched at power-up only. |
| 5. PGOOD | Open-drain power-good status | Asserts high after 184μs post-soft-start when VOUT ≥93.5% of target; pulls low if VOUT ≤90%; requires external pullup. |
| 6. FB | Feedback voltage sense | Monitors output via resistor divider; internal 0.8V reference enables precise VOUT programming from 0.8V to 1.5V. |
| 7. OUTSNS | Output voltage Kelvin sense | Connects to positive terminal of COUT for accurate regulation under PCB trace resistance; improves load regulation by >0.5%. |
| 8. LX | Switching node | Drives external inductor; carries high di/dt pulses; requires short, wide trace routing to minimize parasitic inductance and ringing. |
| EP | Exposed thermal pad | Must be soldered to GND plane with ≥4 thermal vias (0.3mm diameter) for effective heat dissipation and junction temperature control. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation network; enables stable operation with only four external components (CIN, COUT, L, R-divider). |
| 100% duty-cycle operation | Allows VIN to drop to VOUT + (IOUT × RDS(ON)H) while maintaining regulation - extends usable battery voltage range by ~150mV in Li-ion applications. |
| Prebias startup capability | Enables safe soft-start into an already charged output capacitor without discharging it - essential for multi-rail SoC power sequencing. |
| All-ceramic capacitor support | Validated with X7R-grade 2.2µF CIN and 22µF COUT; eliminates electrolytic or tantalum parts, improving reliability and lifetime in high-temp environments. |
| Robust protection suite | Includes cycle-by-cycle overcurrent (1.46A peak limit), thermal shutdown (+165°C), and input UVLO (2.6V with 200mV hysteresis) - prevents damage during fault conditions without external circuitry. |
Applications
| Industrial PLC I/O Modules | Portable Medical Sensors |
|---|---|
Use Scenario: Powering isolated digital I/O channels and analog front-ends in DIN-rail mounted programmable logic controllers where board space and thermal management are constrained. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 5V backplane supply to 1.2V for microcontroller cores and 0.8V for ADC/DAC reference domains. Use Value: High efficiency (>90% at 500mA) and −40°C to +125°C rating ensure stable operation in uncooled enclosures; 2MHz switching avoids interference with CAN bus timing. | Use Scenario: Supplying ultra-low-noise bias to wearable biosensor signal chains (ECG, SpO₂) in battery-powered diagnostic patches. IC Role / Device Role / Timing Role: Low-noise, prebias-capable buck converter generating clean 1.5V rail from coin-cell or LiPo source for op-amps and SAR ADCs. Use Value: PFM mode delivers >85% efficiency at 10mA load; ±1% FB accuracy maintains ADC full-scale linearity; small 2mm × 2mm TDFN fits within 8mm × 8mm wearable PCB area budget. |
| Factory Automation Vision Systems | Smart Building Edge Controllers |
Use Scenario: Providing regulated 1.2V and 0.8V supplies to CMOS image sensor interfaces and FPGA configuration logic in compact machine vision cameras. IC Role / Device Role / Timing Role: Dual-rail capable buck converter supporting simultaneous core and I/O domain regulation with independent soft-start sequencing. Use Value: 100% duty-cycle operation sustains output during brownout events on 3.3V field bus; 2MHz switching allows integration of inductor within camera module height envelope (<3.5mm). | Use Scenario: Powering ARM Cortex-M7-based edge nodes in HVAC controllers and lighting gateways deployed in non-climate-controlled mechanical rooms. IC Role / Device Role / Timing Role: Main system regulator converting 5V PoE-derived input to 1.2V for MCU and 0.8V for RF transceiver subsystems. Use Value: Thermal shutdown and overcurrent protection prevent field failures due to dust-induced heatsink degradation; TDFN package withstands 85°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17626ATA+T | Fixed 4MHz switching frequency; supports 1.5V–3.3V output range; uses 1µH inductor; lower COUT requirement (10µF min) | Targeted at higher-output-voltage rails (e.g., 1.8V/2.5V/3.3V I/O supplies) where smaller inductors and faster transient response are prioritized | Select MAX17626ATA+T when output voltage exceeds 1.5V or when board layout demands <1.0mm inductor height; not interchangeable without resistor divider and inductor change |
| TPS62840DLCR | 2.7V–6.5V input; 800mA output; 1.8MHz/3.6MHz selectable frequency; 75nA shutdown current; no OUTSNS pin | Better suited for ultra-low-power IoT endpoints requiring nanoscale quiescent current; lacks Kelvin sensing and prebias startup | Choose TPS62840DLCR for battery life-critical wearables with <100μA average load; avoid where output regulation accuracy under PCB trace resistance matters |
Compared with MAX17626ATA+T, the MAX17625ATA+T provides tighter low-voltage regulation (0.8V–1.5V) with proven stability using 22µF COUT, while TPS62840DLCR trades sensing precision and robustness for sub-100nA shutdown - making MAX17625ATA+T optimal for industrial point-of-load where accuracy and fault resilience outweigh minimum IQ.
Availability
MAX17625ATA+T is available at Aetrix Electronics and suitable for factory automation I/O modules, portable medical sensors, vision system power rails, and smart building edge controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX17625ATA+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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power, sensing, and conversion solutions.
The MAX17625/MAX17626 product line was designed specifically for space-constrained, thermally demanding industrial point-of-load applications requiring high efficiency, robust protection, and minimal external components - targeting factory automation, robotics, and embedded vision systems.
FAQ
What is the maximum output current capability of the MAX17625ATA+T?
The MAX17625ATA+T delivers up to 700mA of continuous output current under typical thermal conditions (four-layer PCB, 25°C ambient). This rating assumes proper thermal design including connection of the exposed pad (EP) to a large ground plane with ≥4 thermal vias. At higher ambient temperatures or with reduced copper area, derating applies per the 85.3°C/W θJA specification - e.g., at +85°C ambient, max continuous load drops to ~550mA to maintain <125°C junction temperature. Peak current limit is 1.46A (typ), but sustained operation above 700mA risks thermal shutdown.
Does the MAX17625ATA+T support startup into a precharged output capacitor?
Yes, the MAX17625ATA+T supports safe startup into a prebiased output without discharging the output capacitor, in both PFM and forced-PWM modes. This is achieved through internal control logic that monitors the FB and OUTSNS pins during enable assertion and suppresses high-side FET turn-on until the output voltage aligns with the programmed setpoint. This feature is critical for multi-rail systems such as FPGA or SoC designs where power sequencing must avoid reverse current flow between independently powered domains - and is explicitly validated in the MAX17625/MAX17626 datasheet Section "Startup into a Prebiased Output".
What is the purpose of the OUTSNS pin on the MAX17625ATA+T?
The OUTSNS pin on the MAX17625ATA+T provides Kelvin (remote) sensing of the output voltage at the load, separate from the FB feedback node. It connects directly to the positive terminal of the output capacitor (COUT) via a dedicated trace, enabling the regulator to compensate for voltage drop across PCB traces and interconnect resistance. This improves load regulation accuracy by >0.5% compared to single-point sensing - especially valuable in high-current or long-trace industrial layouts. Unlike FB, OUTSNS does not set the regulation point; it only enhances accuracy by feeding true output voltage into the internal error amplifier's compensation path.
Can the MAX17625ATA+T operate with 100% duty cycle, and what design benefit does that provide?
Yes, the MAX17625ATA+T supports true 100% duty-cycle operation, where the high-side pMOS remains continuously on and the low-side nMOS stays off. This allows the output voltage to be maintained even when the input voltage drops to VOUT + (IOUT × RDS(ON)H) - approximately VOUT + 140mV at 700mA (using 200mΩ max RDS(ON)H). In battery-powered applications, this extends usable runtime by allowing full discharge of single-cell Li-ion (2.7V cutoff) down to ~0.8V output, gaining ~150mV additional operational range versus non-100% duty-cycle regulators - a key advantage in portable industrial tools and handheld test equipment.
How does the MODE pin affect efficiency and noise performance of the MAX17625ATA+T?
The MODE pin on the MAX17625ATA+T selects between two distinct operating modes: grounding MODE enables forced-PWM (fixed 2MHz), while leaving MODE open enables PFM (pulse-frequency modulation). In PWM mode, the device maintains constant frequency and allows negative inductor current, yielding predictable EMI spectra ideal for noise-sensitive applications like analog sensor front-ends - but with lower light-load efficiency (~75% at 10mA). In PFM mode, the device skips pulses at light loads, achieving >85% efficiency at 10mA and reducing audible noise and standby power - though EMI becomes broadband and less deterministic. The choice depends on whether spectral purity or energy efficiency dominates the system requirement.
MAX17625ATA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 700mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
MAX17625ATA+T FAQ
1.How can I place an order for MAX17625ATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17625ATA+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 MAX17625ATA+T reliable?
The price and inventory of MAX17625ATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17625ATA+T is usually 5 days.
3.What payment methods are accepted for MAX17625ATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17625ATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17625ATA+T?
MAX17625ATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17625ATA+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 MAX17625ATA+T?
For technical support, including MAX17625ATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17625ATA+T requirements.
6.How does Aetrix verify that MAX17625ATA+T is sourced from the original manufacturer or authorized distributors?
All MAX17625ATA+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 MAX17625ATA+T meets industry standards.
7.What is the process for return or replacement of MAX17625ATA+T?
All MAX17625ATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17625ATA+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 MAX17625ATA+T part is unused and in its original packaging.
Return procedure for MAX17625ATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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