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Analog Devices Inc./Maxim Integrated MAX17570CATA+
- Part No.:
- MAX17570CATA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX17570CATA+.pdf
- Description:
- IC REG BUCK ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,039
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Product details
Overview
MAX17570CATA+ from Analog Devices is a 4.5V to 60V input, 300mA synchronous step-down DC-DC converter in an 8-pin 2mm × 2mm TDFN package, featuring internal MOSFETs, fixed 3.3V output (MAX17570C variant), 95.8% peak efficiency at 15VIN/12VOUT, and -40°C to +125°C ambient operation. It delivers compact, high-efficiency power for industrial point-of-load rails.
For engineers reviewing the MAX17570CATA+ datasheet, MAX17570CATA+ pinout, MAX17570CATA+ application, or MAX17570CATA+ equivalent, key selection considerations include its integrated FETs, programmable EN/UVLO threshold (1.215V typ), open-drain RESET output with 95% rising/92% falling thresholds, PFM/PWM mode flexibility, and compliance with CISPR32 Class B emissions.
Technical Context
The MAX17570CATA+ implements a current-mode control architecture with internal slope compensation, cycle-by-cycle peak current limiting (0.56A typ), hiccup-mode overcurrent protection, and monotonic startup into prebiased outputs. Its integrated high-side pMOS (1.38Ω typ RDS(on)) and low-side nMOS (0.5Ω typ RDS(on)) enable fully synchronous operation without external Schottky diodes.
It integrates a 5V LDO (VCC) with 4.75V–5.25V output, 13–50mA current limit, and internal UVLO (4.18V rising). The RT/SYNC pin supports resistor-programmable switching frequency (200kHz–1MHz) and external clock synchronization - though SYNC is disabled in PFM variants like MAX17570C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and automotive battery inputs without external pre-regulation. |
| Output Voltage | Fixed 3.3V (±1.5% regulation) - eliminates external feedback resistors for simplified layout and BOM reduction. |
| Max Output Current | 300mA - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained systems. |
| Peak Efficiency | 95.8% at VIN=15V, VOUT=12V, IOUT=150mA - minimizes thermal dissipation and improves system reliability. |
| Shutdown Current | 2.2μA (typ) - enables ultra-low-power standby modes in battery-backed or energy-harvesting applications. |
| Operating Temp Range | -40°C to +125°C ambient - qualified for harsh industrial environments including factory automation and aftermarket automotive. |
| Switching Frequency | 200kHz to 1MHz (resistor-programmable) - allows optimization of size vs. EMI; default 400kHz when RT/SYNC open. |
| RESET Threshold Accuracy | Rising: 95% ±1.5%, Falling: 92% ±2% of VOUT - provides precise power-good monitoring for downstream logic sequencing. |
Pinout & Package
Package: 8-pin, 2mm × 2mm TDFN (T822C+6C), exposed pad for thermal performance (θJA = 162°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Primary input rail connection; requires local 1μF X7R ceramic bypass to GND for noise suppression and stability. |
| EN/UVLO (Pin 2) | Enable / Input UVLO Input | Active-high enable with programmable turn-on threshold (1.215V typ); supports resistor-divider for custom input undervoltage lockout. |
| VCC (Pin 3) | LDO Output | Internally regulated 5V supply for gate drivers and control circuitry; must be bypassed with ≥1μF capacitor to GND. |
| VOUT/FB (Pin 4) | Feedback Input | Direct connection to 3.3V output for fixed-voltage operation; monitors regulation and triggers RESET assertion. |
| RT/SYNC (Pin 5) | Oscillator Timing / Sync Input | Resistor-programmable frequency setting (200kHz–1MHz); SYNC function disabled in MAX17570C variant. |
| RESET (Pin 6) | Open-Drain Power-Good Output | Asserts low when VOUT falls below 92%; goes high-impedance 1024 cycles after VOUT rises above 95% - enables safe system power sequencing. |
| GND (Pin 7) | Ground Reference | Common return path for power and signal; requires low-inductance connection to PCB ground plane. |
| LX (Pin 8) | Switch Node | Connection to inductor switch node; carries high di/dt current - demands short, wide trace routing and careful layout to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High- and Low-Side MOSFETs | Eliminates external Schottky diode and reduces component count by up to 4 parts versus asynchronous designs. |
| Internal Compensation | Removes need for external compensation network - simplifies design, improves consistency across production units. |
| All-Ceramic Capacitor Support | Enables ultra-compact layout using only X7R MLCCs for input/output filtering - no electrolytics required. |
| Monotonic Startup into Prebiased Output | Prevents reverse current flow during power-up - critical for multi-rail systems with powered peripherals before main regulator enables. |
| Hiccup-Mode Overcurrent Protection | Shuts down switching for 32768 cycles (≈164ms at 200kHz) during overload - limits junction temperature rise and prevents thermal runaway. |
| CISPR32 Class B Compliance | Meets conducted and radiated emission limits without additional shielding or filtering - reduces EMC debug time and cost. |
Applications
| Factory Automation Sensors | Aftermarket Asset Trackers |
|---|---|
Use Scenario: Compact industrial sensors deployed in PLC cabinets or robotic arms require reliable 3.3V power under wide input voltage swings (e.g., 12–48V DC bus) and elevated ambient temperatures. IC Role / Device Role: Primary point-of-load regulator delivering stable 3.3V to microcontroller, ADC, and CAN transceiver. Use Value: 95.8% peak efficiency and -40°C to +125°C rating reduce heat buildup and eliminate derating concerns in enclosed enclosures. | Use Scenario: GPS-enabled vehicle asset trackers mounted in engine bays or cargo trailers face extreme thermal cycling and limited board area. IC Role / Device Role: Single-chip 3.3V power solution replacing discrete buck controllers + external FETs + compensation components. Use Value: 2mm × 2mm TDFN footprint and all-ceramic support shrink total solution size by >40% versus typical 6mm × 6mm alternatives. |
| Industrial IoT Edge Nodes | Ruggedized HMI Displays |
Use Scenario: Battery- or solar-powered edge nodes collecting vibration, temperature, and pressure data must operate for months between charges. IC Role / Device Role: Main system regulator with ultra-low 2.2μA shutdown current and PFM light-load efficiency optimization. Use Value: Sub-μA quiescent draw extends battery life; hiccup-mode protection ensures survival during accidental short-circuits in field-deployed units. | Use Scenario: Human-machine interface displays in manufacturing equipment require robust 3.3V rail immune to voltage sags during motor starts or ESD events. IC Role / Device Role: Regulator with programmable EN/UVLO, open-drain RESET, and overtemperature shutdown. Use Value: RESET output sequences display controller boot; thermal shutdown (166°C) and hiccup recovery prevent permanent damage during transient overloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | Automotive-grade AEC-Q100, 3.5V–65V input, 300mA, adjustable output only; no fixed 3.3V option; requires external compensation. | Targeted at automotive infotainment and ADAS; lacks factory-programmed 3.3V output and integrated soft-start timing. | Select if AEC-Q100 qualification and wider input range are mandatory; accept added design complexity for feedback and compensation. |
| TPS54202DRCT | 2.9V–60V input, 2A output, adjustable only; uses external MOSFETs; higher IQ (47μA) and no RESET output. | Suited for higher-current industrial loads; lacks integrated FETs, power-good signaling, and ultra-low shutdown current. | Choose when >300mA load current is required; avoid when board space, EMI, or precise power sequencing are constraints. |
Compared with LM5164QDDARQ1 and TPS54202DRCT, the MAX17570CATA+ offers plug-and-play 3.3V regulation, lowest shutdown current (2.2μA), and integrated RESET - reducing bill-of-materials count and enabling faster time-to-market for compact industrial power rails.
Availability
MAX17570CATA+ is available at Aetrix Electronics and suitable for factory automation sensors, aftermarket asset trackers, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX17570CATA+ 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.
The MAX17570 belongs to Analog Devices' high-voltage synchronous buck converter product line, designed specifically for compact, efficient, and robust point-of-load power in harsh industrial and transportation environments.
FAQ
What output voltage does the MAX17570CATA+ deliver?
The MAX17570CATA+ is the fixed 3.3V output variant of the MAX17570 family. Its VOUT/FB pin is internally configured to regulate precisely to 3.3V (±1.5%) without external resistors - confirmed by the Electrical Characteristics table listing VOUTREG = 3.25V to 3.35V for MAX17570C. This eliminates feedback divider design effort and improves accuracy over temperature.
Does the MAX17570CATA+ support external clock synchronization?
No, the MAX17570CATA+ does not support external clock synchronization. As stated in the datasheet's "Switching Frequency and Clock Synchronization" section, SYNC functionality is disabled in PFM variants - and MAX17570C is explicitly designated as a PFM part (alongside D/E/F). The RT/SYNC pin operates solely as a resistor-programmed oscillator input.
What is the maximum junction temperature and thermal protection behavior of the MAX17570CATA+?
The MAX17570CATA+ features thermal shutdown at 166°C (rising) with 20°C hysteresis. When junction temperature exceeds this threshold, internal circuitry disables both MOSFETs and halts switching until the die cools to 146°C, at which point normal operation resumes. This protects against permanent damage during sustained overload or poor heatsinking conditions.
Can the MAX17570CATA+ start up safely into a prebiased output voltage?
Yes, the MAX17570CATA+ supports monotonic startup into a prebiased output. Its control architecture prevents reverse current flow during soft-start, allowing it to power up cleanly even when the output capacitor is already charged - a critical capability for systems with multiple independent power rails or hot-swap requirements.
What is the purpose and behavior of the RESET pin on the MAX17570CATA+?
The RESET pin on the MAX17570CATA+ is an open-drain output that signals power-good status. It transitions to high-impedance 1024 switching cycles after VOUT/FB rises above 95% of nominal regulation, and pulls low when VOUT/FB falls below 92%. This provides precise, delay-compensated sequencing for downstream processors and memory, ensuring stable operation before system initialization begins.
MAX17570CATA+ 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):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 58.2V
- Current - Output:
- 300mA
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x2)
MAX17570CATA+ FAQ
1.How can I place an order for MAX17570CATA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17570CATA+ 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 MAX17570CATA+ reliable?
The price and inventory of MAX17570CATA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17570CATA+ is usually 5 days.
3.What payment methods are accepted for MAX17570CATA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17570CATA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17570CATA+?
MAX17570CATA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17570CATA+ 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 MAX17570CATA+?
For technical support, including MAX17570CATA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17570CATA+ requirements.
6.How does Aetrix verify that MAX17570CATA+ is sourced from the original manufacturer or authorized distributors?
All MAX17570CATA+ 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 MAX17570CATA+ meets industry standards.
7.What is the process for return or replacement of MAX17570CATA+?
All MAX17570CATA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17570CATA+, 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 MAX17570CATA+ part is unused and in its original packaging.
Return procedure for MAX17570CATA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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