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Analog Devices Inc./Maxim Integrated MAX17553AATA+
- Part No.:
- MAX17553AATA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN
- Datasheet:
-
MAX17553AATA+.pdf
- Description:
- IC REG BUCK ADJ 50MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,242
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Product details
Overview
MAX17553AATA+ from Analog Devices is a synchronous step-down DC-DC converter with integrated high-side p-MOSFET and low-side n-MOSFET, delivering up to 50mA output current from a 4V–60V input. It features fixed 3.3V output, 310kHz default switching frequency, internal soft-start (3.2ms), and operates across –40°C to +125°C ambient. Used in factory automation power rails where compact size and thermal efficiency are critical.
For engineers reviewing the MAX17553AATA+ datasheet, MAX17553AATA+ pinout, MAX17553AATA+ application, or MAX17553AATA+ equivalent, key selection considerations include its 8-pin TDFN (2mm × 2mm) package, 91.5% full-load efficiency at 24VIN/5VOUT, adjustable UVLO with hysteresis, open-drain RESET monitoring, and DCM operation for light-load efficiency.
Technical Context
The MAX17553AATA+ implements peak-current-mode control with programmable switching frequency (150kHz–1.5MHz via RT pin) and built-in loop compensation. Its architecture supports prebiased startup and discontinuous conduction mode (DCM) to maintain regulation under ultra-light loads by pulse-skipping.
It integrates protection features including hiccup-mode overcurrent response (triggered after 16 consecutive peak-current-limit events), thermal shutdown at 160°C (20°C hysteresis), and robust EN/UV with HYST-programmable turn-on/off thresholds - enabling precise input voltage sequencing in industrial power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide-range industrial and automotive battery inputs without external pre-regulation. |
| Output Voltage | Fixed 3.3V - eliminates external feedback resistors; ±1.5% regulation accuracy over –40°C to +125°C. |
| Max Output Current | 50mA - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained designs. |
| Switching Frequency | Default 310kHz (unconnected RT); adjustable 150kHz–1.5MHz - enables EMI optimization and inductor size trade-offs. |
| Efficiency | 91.5% at 24VIN/5VOUT/full load - reduces thermal stress and simplifies thermal management in sealed enclosures. |
| Quiescent Current | 3.8µA in shutdown - extends battery life in always-on monitoring systems. |
| Package | 8-pin TDFN (2mm × 2mm) - ultra-compact footprint ideal for PCB area-sensitive applications like asset trackers. |
Pinout & Package
MAX17553AATA+ is housed in an 8-pin TDFN package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. The package supports JEDEC-standard reflow and provides θJA = 162°C/W on a four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power input | Accepts 4V–60V; requires local 1µF ceramic decoupling to minimize input ripple and EMI. |
| 2 EN/UV | Enable / undervoltage lockout | Active-high logic; rising threshold 1.215V (typ); enables precise input voltage turn-on sequencing. |
| 3 HYST | Hysteresis programming | Connected to EN/UV via resistor to set differential turn-on/turn-off voltage window (e.g., 20V ON / 14V OFF). |
| 4 RT | Frequency programming | Resistor-to-GND sets fSW; unconnected = 310kHz; avoids unstable 215–308kHz range per design constraints. |
| 5 FB/VO | Feedback / boot-strap | Direct connection to 3.3V output enables internal boot-strap supply and closed-loop regulation. |
| 6 RESET | Open-drain power-good | Pulled low if VOUT drops below 92% of nominal; high-impedance 30µs after reaching 95% - enables system reset coordination. |
| 7 GND | Power ground | Must connect to low-impedance ground plane; serves as reference for all analog and power circuits. |
| 8 LX | Switching node | Connects to inductor; high-impedance during shutdown; carries high di/dt - demands short, wide PCB trace routing. |
Key Features
| Feature | Design Value |
|---|---|
| No external Schottky diode required | Synchronous rectification using integrated MOSFETs eliminates conduction loss and heat generation. |
| All-ceramic capacitor support | Enables ultra-compact layout with no electrolytic capacitors - improves reliability and lifetime in harsh environments. |
| Internal soft-start (3.2ms) | Prevents input inrush current and output overshoot during power-up - critical for systems with sensitive downstream circuitry. |
| Discontinuous Conduction Mode (DCM) | Maintains high efficiency down to µA-level loads via pulse-skipping - extends battery runtime in intermittent-sensing applications. |
| CISPR32 Class B compliance | Meets radiated emission limits for industrial equipment without additional filtering - reduces BOM cost and layout complexity. |
Applications
| Factory Automation Sensors | Automotive Asset Trackers |
|---|---|
Use Scenario: Powering temperature/humidity sensors and IO-Link transceivers inside sealed PLC cabinets with limited airflow. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator converting 24V DC bus to clean, stable MCU core voltage. Use Value: 91.5% efficiency and -40°C to +125°C operation prevent thermal shutdown in high-ambient industrial settings. | Use Scenario: Compact GPS/LoRaWAN tracking units mounted on fleet vehicles, requiring minimal board area and long battery life. IC Role / Device Role / Timing Role: Step-down regulator supplying 3.3V to ultra-low-power microcontroller and RF transceiver from 12V–48V vehicle battery. Use Value: 2mm × 2mm TDFN package and 3.8µA shutdown current enable multi-year operation on coin-cell or small Li-SOCl₂ batteries. |
| Industrial IoT Edge Nodes | Ruggedized Medical Monitors |
Use Scenario: Battery-powered vibration analyzers deployed on rotating machinery, operating intermittently with wake-on-event behavior. IC Role / Device Role / Timing Role: Always-on 3.3V supply for real-time clock, sensor interface, and low-power MCU sleep-state rail. Use Value: DCM operation ensures >85% efficiency at 100µA load, minimizing self-heating and preserving battery capacity between measurements. | Use Scenario: Portable patient monitors used in field triage or ambulance transport, subject to wide temperature swings and mechanical shock. IC Role / Device Role / Timing Role: Main 3.3V power source for display controller, ADC, and wireless comms ICs from 24V medical-grade power adapter. Use Value: Built-in overtemperature and hiccup-mode protection guarantee safe operation during extended use in non-ventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36503RNXR | 3.3V fixed, 0.3A output, 3V–65V input, 12-pin WSON - higher current but larger footprint and no HYST pin. | Targets higher-power applications; lacks programmable UVLO hysteresis and RESET monitoring. | Select when >50mA load current is required and board area permits larger package. |
| TPS63001DRCR | Buck-boost topology, 1.8V–5.5V output, 1.8V–5.5V input - not suitable for 4V–60V input range. | Designed for single-cell battery systems; cannot replace MAX17553AATA+ in high-input-voltage applications. | Only consider if input voltage stays below 5.5V and buck-boost functionality is needed. |
Compared with LMR36503RNXR and TPS63001DRCR, the MAX17553AATA+ uniquely combines ultra-small 2mm × 2mm packaging, integrated UVLO hysteresis programming, and true 4V–60V operation - making it optimal for space- and input-range-constrained industrial subsystems.
Availability
MAX17553AATA+ is available at Aetrix Electronics and suitable for factory automation sensors, automotive asset trackers, and industrial IoT edge nodes requiring stable component supply and long-term manufacturability.
Supply support for MAX17553AATA+ 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 industrial, automotive, communications, and healthcare markets.
The MAX17553 series belongs to Analog Devices' high-voltage DC-DC converter product line, designed specifically for reliable, compact, and efficient power conversion in harsh industrial environments with wide input voltage ranges.
FAQ
What is the output voltage of the MAX17553AATA+?
The MAX17553AATA+ delivers a fixed 3.3V output voltage with ±1.5% regulation accuracy over the full –40°C to +125°C operating temperature range. Unlike the MAX17553C variant, it does not require external feedback resistors - the FB/VO pin connects directly to the output node to enable internal regulation and boot-strap operation.
Does the MAX17553AATA+ support adjustable switching frequency?
Yes, the MAX17553AATA+ supports adjustable switching frequency from 150kHz to 1.5MHz via an external resistor connected from the RT pin to GND. With RT unconnected, it defaults to 310kHz. The device avoids the 215kHz–308kHz range to ensure stable adaptive-loop compensation, as specified in the datasheet.
How does the RESET pin function on the MAX17553AATA+?
The RESET pin on the MAX17553AATA+ is an open-drain output that signals power-good status. It goes high-impedance 30µs after FB/VO rises above 95% of the regulated 3.3V output and pulls low when FB/VO falls below 92%. It also asserts low during shutdown (EN/UV < 1.09V) and hiccup-mode fault conditions.
Can the MAX17553AATA+ operate with a 3.3V input voltage?
No, the MAX17553AATA+ has a minimum input voltage of 4V. Attempting to operate below 4V violates the absolute maximum ratings and will prevent proper regulation. Its wide 4V–60V input range is optimized for industrial 24V buses, automotive 12V/24V/48V systems, and PoE-derived supplies - not low-voltage battery sources.
What protection features are integrated into the MAX17553AATA+?
The MAX17553AATA+ integrates hiccup-mode overcurrent protection (triggered after 16 consecutive peak-current-limit events), thermal shutdown at 160°C (with 20°C hysteresis), and robust EN/UV with programmable hysteresis. These features ensure safe operation during output shorts, ambient temperature excursions, and brown-out conditions without requiring external protection circuitry.
MAX17553AATA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN
- 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):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 54V
- Current - Output:
- 50mA
- Frequency - Switching:
- 150kHz ~ 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x2)
MAX17553AATA+ FAQ
1.How can I place an order for MAX17553AATA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17553AATA+ 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 MAX17553AATA+ reliable?
The price and inventory of MAX17553AATA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17553AATA+ is usually 5 days.
3.What payment methods are accepted for MAX17553AATA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17553AATA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17553AATA+?
MAX17553AATA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17553AATA+ 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 MAX17553AATA+?
For technical support, including MAX17553AATA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17553AATA+ requirements.
6.How does Aetrix verify that MAX17553AATA+ is sourced from the original manufacturer or authorized distributors?
All MAX17553AATA+ 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 MAX17553AATA+ meets industry standards.
7.What is the process for return or replacement of MAX17553AATA+?
All MAX17553AATA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17553AATA+, 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 MAX17553AATA+ part is unused and in its original packaging.
Return procedure for MAX17553AATA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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