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Analog Devices Inc./Maxim Integrated MAX17626ATA+
- Part No.:
- MAX17626ATA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX17626ATA+.pdf
- Description:
- IC REG BUCK ADJ 700MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:155
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Product details
Overview
MAX17626ATA+ from Analog Devices is a synchronous step-down DC-DC converter with integrated high-side pMOSFET and low-side nMOSFET, operating from 2.7V to 5.5V input and delivering up to 700mA output current at adjustable 1.5V–3.3V output voltage. It features fixed 4MHz switching frequency, ±1% feedback accuracy, and 100% duty-cycle capability for battery-powered applications requiring extended runtime.
For engineers reviewing the MAX17626ATA+ datasheet, MAX17626ATA+ pinout, MAX17626ATA+ application, or MAX17626ATA+ equivalent, this page delivers verified technical context, validated pin functions, real-world application constraints (e.g., prebias startup, PFM/PWM mode selection), and confirmed alternative options for point-of-load power design in industrial and personal electronics.
Technical Context
The MAX17626ATA+ implements peak-current-mode control with internal slope compensation and fixed-frequency oscillator set to 4MHz. Its control loop uses an internally compensated error amplifier comparing FB voltage (0.8V reference) against a resistor-divider output, enabling stable regulation across -40°C to +125°C ambient.
It integrates dual MOSFETs (RDS(ON)H = 100–160mΩ at 5V, RDS(ON)L = 70–130mΩ at 5V), supports both PWM and PFM operation via MODE pin latching at power-up, and includes cycle-by-cycle overcurrent protection with 1.46A (typ) peak limit 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 | 1.5V to 3.3V - programmable via external resistor divider; MAX17626 variant specifically optimized for this range. |
| Switching Frequency | Fixed 4MHz - enables use of compact 1µH inductor and small ceramic capacitors (e.g., 10µF COUT), reducing solution footprint. |
| Max Output Current | 700mA - sustained load capability with thermal derating per θJA = 85.3°C/W on 4-layer board. |
| Feedback Accuracy | ±1% - ensures tight output regulation critical for powering precision analog or low-voltage logic rails. |
| Shutdown Current | 0.1µA (typ) - minimizes battery drain in always-on systems during deep sleep or standby modes. |
| Operating Temperature | -40°C to +125°C ambient - qualified for factory automation, automotive body electronics, and industrial embedded environments. |
Pinout & Package
Package: 8-pin TDFN (2mm × 2mm, exposed pad), RoHS-compliant, thermal performance optimized with EP connected to GND plane via multiple vias (θJC = 8.9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power supply input | Accepts 2.7V–5.5V; requires local 2.2µF ceramic decoupling capacitor placed adjacent to IN and GND pins. |
| GND | Power ground reference | Primary return path for input/output currents; must connect to large copper plane and tie to EP for thermal management. |
| EN | Enable control input | Logic-high (>2V) enables regulation; logic-low (<0.8V) disables device and reduces quiescent current to 0.1µA. |
| MODE | Operation mode select | Grounded = forced PWM (fixed 4MHz); unconnected = PFM (pulse-skipping at light loads for higher efficiency). |
| PGOOD | Open-drain power-good status | Asserts high after 184µs post-soft-start when VOUT > 93.5% of target; pulls low if VOUT < 90%, enabling system sequencing. |
| FB | Feedback voltage sense | Monitors output via resistor divider; internal 0.8V reference sets VOUT = 0.8V × (1 + R1/R2); ±1% accuracy ensures rail stability. |
| OUTSNS | Output voltage Kelvin sense | Connects directly to COUT positive terminal to reject PCB trace IR drop and improve load regulation accuracy. |
| LX | Switching node | Drives external inductor; requires short, low-inductance trace to minimize EMI and switching losses; connects to 1µH inductor for 4MHz operation. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation network; supports stable operation with 10µF ceramic output capacitor (optimized for MAX17626). |
| Prebias soft-start | Allows safe startup into precharged output without discharging COUT - essential for multi-rail digital systems with staggered power sequencing. |
| 100% duty-cycle operation | Enables dropout-free regulation down to VIN ≈ VOUT + IOUT × (RDS(ON)H + DCRL); extends usable battery voltage range in portable devices. |
| All-ceramic capacitor support | Validated with X7R-grade 2.2µF input and 10µF output capacitors - reduces solution size, cost, and improves reliability vs. electrolytic alternatives. |
| Robust protection suite | Includes overcurrent (peak/valley/negative limits), overtemperature (165°C shutdown, 10°C hysteresis), and UVLO (2.6V turn-on, 200mV hysteresis). |
Applications
| Factory Automation Sensors | Portable Medical Monitors |
|---|---|
|
Use Scenario: Powering isolated analog front-ends and microcontrollers in PLC I/O modules operating in enclosed cabinets with limited airflow. IC Role / Device Role: Primary point-of-load regulator converting 5V backplane to 3.3V/2.5V rails with minimal heat generation. Use Value: High efficiency (>90% at 700mA, 4MHz) and -40°C to +125°C rating prevent thermal shutdown in unventilated enclosures. |
Use Scenario: Supplying low-noise 1.8V core voltage to ADCs and wireless SoCs in handheld diagnostic devices powered by single-cell Li-ion. IC Role / Device Role: Compact, integrated buck converter replacing discrete FET + controller solutions to meet stringent size and battery-life targets. Use Value: 4MHz operation enables 1µH inductor and 10µF COUT, reducing total BOM area by >40% vs. 2MHz alternatives; PFM mode extends standby time. |
| Industrial HMI Displays | Smart Home Edge Controllers |
|
Use Scenario: Generating 1.2V for FPGA configuration and 3.3V for interface logic in touch-panel controllers deployed in factory environments. IC Role / Device Role: Dual-rail power source using single MAX17626ATA+ per rail with independent feedback dividers. Use Value: ±1% FB accuracy and PGOOD output ensure reliable FPGA configuration and deterministic system boot under varying load and temperature. |
Use Scenario: Powering Zigbee/Thread SoCs and sensor hubs in battery-operated smart thermostats requiring multi-year operation on AA cells. IC Role / Device Role: Main system regulator stepping down 3.6V nominal battery voltage to 2.5V/3.3V while maintaining ultra-low shutdown current. Use Value: 0.1µA shutdown current and 100% duty-cycle capability maximize battery life; robust OCP protects against shorted sensor lines. |
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 |
|---|---|---|---|
| TPS62840DLCR | 2.7V–6.5V input, 4MHz, 750mA, 0.8V–5.5V output; 25nA IQ in shutdown; no PGOOD or OUTSNS pin. | Lacks Kelvin sensing and power-good output - unsuitable for precision regulation or system sequencing-critical designs. | Select when lowest quiescent current is primary requirement and PGOOD/OUTSNS are not needed. |
| MP2155GQZ-P | 2.5V–5.5V input, 4MHz, 600mA, 0.6V–5V output; ±2% FB accuracy; no prebias startup or 100% duty cycle. | Lower output accuracy and missing prebias startup limit use in multi-rail digital systems with powered-up peripherals. | Select for cost-sensitive consumer applications where ±2% regulation and absence of prebias are acceptable. |
Compared with TPS62840DLCR and MP2155GQZ-P, the MAX17626ATA+ uniquely combines 100% duty-cycle operation, Kelvin-sense output voltage monitoring, and guaranteed prebias startup - making it the only option among the three qualified for industrial point-of-load designs demanding robustness, precision, and seamless power sequencing.
Availability
MAX17626ATA+ is available at Aetrix Electronics and suitable for factory automation sensors, portable medical monitors, industrial HMI displays, and smart home edge controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX17626ATA+ 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 since 1965.
The MAX17626ATA+ belongs to Analog Devices' high-frequency, integrated power management IC portfolio, designed specifically for space-constrained, thermally demanding point-of-load applications where efficiency, accuracy, and reliability are non-negotiable.
FAQ
What is the switching frequency of the MAX17626ATA+ and how is it configured?
The MAX17626ATA+ operates at a fixed 4MHz switching frequency, which is factory-set and not user-adjustable. This frequency is inherent to the MAX17626 variant (vs. MAX17625's 2MHz) and enables compact magnetics and low-profile ceramic capacitors. No external components or register writes are required to configure it - the frequency is hard-coded in silicon and remains stable across input voltage, load, and temperature.
Does the MAX17626ATA+ support startup into a prebiased output, and what does that mean for system design?
Yes, the MAX17626ATA+ supports startup into a prebiased output without discharging the output capacitor - a feature critical for multi-rail systems where downstream circuitry may already be powered. During soft-start, the device actively regulates without forcing reverse current through the inductor. This eliminates voltage overshoot and avoids disrupting already-active logic or analog circuits, simplifying power sequencing in FPGAs, SoCs, and sensor hubs.
How does the MODE pin affect efficiency and noise performance in the MAX17626ATA+?
The MODE pin selects between forced PWM (MODE grounded) and PFM (MODE open) operation. In PWM mode, the MAX17626ATA+ maintains constant 4MHz switching regardless of load, yielding predictable EMI but lower light-load efficiency. In PFM mode, it skips pulses at light loads, improving efficiency by >20% at 10mA but generating variable-frequency noise. Designers choose based on whether spectral purity or battery life is prioritized.
What is the purpose of the OUTSNS pin on the MAX17626ATA+, and how must it be connected?
The OUTSNS pin on the MAX17626ATA+ provides Kelvin sensing of the output voltage to reject PCB trace resistance errors and improve load regulation accuracy. It must be connected directly to the positive terminal of the output capacitor (COUT) using a dedicated trace - not shared with the main VOUT power trace. This separate sense path ensures the feedback loop measures true capacitor voltage, enabling ±1% regulation even under high-current transient conditions.
Can the MAX17626ATA+ operate with 100% duty cycle, and under what conditions is this useful?
Yes, the MAX17626ATA+ supports true 100% duty-cycle operation, where the high-side MOSFET remains continuously on and the low-side is off. This occurs when VIN approaches VOUT, allowing regulation down to VIN ≈ VOUT + IOUT × (RDS(ON)H + DCRL). It is especially valuable in battery-powered applications - e.g., single-cell Li-ion (2.7V–4.2V) powering a 3.3V rail - maximizing usable battery capacity and runtime before brownout.
MAX17626ATA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Strip
- 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:
- 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
MAX17626ATA+ FAQ
1.How can I place an order for MAX17626ATA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17626ATA+ 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 MAX17626ATA+ reliable?
The price and inventory of MAX17626ATA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17626ATA+ is usually 5 days.
3.What payment methods are accepted for MAX17626ATA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17626ATA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17626ATA+?
MAX17626ATA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17626ATA+ 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 MAX17626ATA+?
For technical support, including MAX17626ATA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17626ATA+ requirements.
6.How does Aetrix verify that MAX17626ATA+ is sourced from the original manufacturer or authorized distributors?
All MAX17626ATA+ 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 MAX17626ATA+ meets industry standards.
7.What is the process for return or replacement of MAX17626ATA+?
All MAX17626ATA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17626ATA+, 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 MAX17626ATA+ part is unused and in its original packaging.
Return procedure for MAX17626ATA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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