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Analog Devices Inc./Maxim Integrated MAX17553CATA+
- Part No.:
- MAX17553CATA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN
- Datasheet:
-
MAX17553CATA+.pdf
- Description:
- IC REG BUCK ADJ 50MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,938
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Product details
Overview
MAX17553CATA+ from Analog Devices is a synchronous step-down DC-DC converter with integrated high-side p-MOSFET and low-side n-MOSFET, operating from 4V to 60V input and delivering up to 50mA output current. It features adjustable output voltage (0.8V to 90% of VIN), 150kHz–1.5MHz programmable switching frequency, and internal fixed soft-start (3.2ms typ). Used in space-constrained industrial power rails requiring high efficiency and wide input range.
For engineers reviewing the MAX17553CATA+ datasheet, MAX17553CATA+ pinout, MAX17553CATA+ application, or MAX17553CATA+ equivalent, key selection considerations include its adjustable feedback architecture (0.8V reference), -40°C to +125°C ambient operation, 8-pin 2mm × 2mm TDFN package, and built-in hiccup-mode overload protection - all critical for robust point-of-load conversion in factory automation and automotive aftermarket systems.
Technical Context
The MAX17553CATA+ implements peak-current-mode control with discontinuous conduction mode (DCM) for improved light-load efficiency. Its internal error amplifier uses a 0.8V ±1.25% reference (over temperature), and adaptive loop compensation eliminates external compensation components. The device supports prebiased startup and features fixed minimum on-time (105ns typ) and off-time (95ns typ) constraints.
Protection architecture includes valley/peak current limiting (110mA/180mA typ), thermal shutdown at 160°C (20°C hysteresis), and open-drain RESET monitoring with 92–95% output voltage thresholds. Input undervoltage lockout is programmable via EN/UV and HYST pins, enabling precise turn-on/off sequencing without external comparators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide industrial and automotive battery inputs including 12V, 24V, and 48V systems without external pre-regulation. |
| Output Current | Up to 50mA - sufficient for powering microcontrollers, sensors, and interface ICs in low-power embedded nodes. |
| Feedback Reference Voltage | 0.8V ±1.25% (–40°C to +125°C) - enables precise adjustable output from 0.8V to 0.9×VIN with minimal external resistor divider error. |
| Switching Frequency | 150kHz to 1.5MHz (programmable via RT pin) - allows EMI optimization and inductor size reduction while maintaining DCM operation down to light loads. |
| Efficiency | 91.5% at full load (VIN = 24V, VOUT = 5V) - reduces thermal stress in sealed enclosures and extends battery life in portable equipment. |
| Shutdown Current | 3.8µA - enables ultra-low quiescent power in always-on monitoring circuits without compromising wake-up responsiveness. |
| Operating Temperature | –40°C to +125°C ambient - qualified for harsh environments including motor control cabinets and under-hood automotive modules. |
Pinout & Package
MAX17553CATA+ is housed in an 8-pin, 2mm × 2mm TDFN package (package code T822CN+1) with exposed thermal pad for enhanced heat dissipation. The pinout is identical across MAX17553A/B/C variants and optimized for compact PCB layout with minimal trace inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power supply input | Accepts 4V–60V input; requires local 1µF ceramic decoupling to GND for stable high-frequency operation. |
| 2 EN/UV | Enable / undervoltage lockout input | Logic-controlled ON/OFF; threshold rising/falling at 1.215V/1.09V typ - enables programmable brown-in/brown-out behavior. |
| 3 HYST | Hysteresis programming terminal | Connects to EN/UV via external resistor to set input voltage hysteresis; sinks 100µA when active. |
| 4 RT | Switching frequency programming | Resistor-to-GND sets fSW from 150kHz–1.5MHz; unconnected defaults to 310kHz - enables EMI tuning without changing layout. |
| 5 FB/VO | Feedback input / boot-strap node | 0.8V reference input for adjustable output; connects to resistor divider from VOUT - no external reference required. |
| 6 RESET | Open-drain power-good output | Asserts low when VOUT drops below 92% of target; releases 30µs after VOUT rises above 95% - provides reliable system reset signaling. |
| 7 GND | Power and signal ground | Common return for all currents; must connect to solid ground plane with low-inductance path to minimize noise coupling. |
| 8 LX | Switching node | Drives external inductor; high-impedance during shutdown - requires short, wide trace to reduce EMI and voltage ringing. |
Key Features
| Feature | Design Value |
|---|---|
| All-ceramic capacitor support | Enables ultra-compact layout with X7R/X5R MLCCs only - eliminates bulk electrolytics and improves reliability over temperature. |
| Internal control loop compensation | Removes need for external Type-II/III compensation network - reduces BOM count and design validation effort for stable regulation. |
| Discontinuous conduction mode (DCM) | Maintains high efficiency down to µA-level loads by skipping pulses - ideal for intermittent-sensing applications like IoT edge nodes. |
| Programmable EN/UV and HYST thresholds | Allows precise input voltage sequencing without external comparators or resistive dividers on system power rails. |
| CISPR32 Class B compliance | Meets radiated/conducted emission limits for industrial equipment without added filtering - simplifies EMC certification. |
Applications
| Factory Automation Sensor Node | Automotive Aftermarket Asset Tracker |
|---|---|
Use Scenario: Compact PLC I/O module powering isolated analog sensor front-ends and RS-485 transceivers in high-temperature cabinet environments. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator converting 24V field bus to logic-level rails with tight thermal budget. Use Value: 91.5% efficiency at 24V→5V and –40°C to +125°C rating prevent thermal derating and ensure uptime in unventilated enclosures. |
Use Scenario: GPS-enabled cargo monitor powered by vehicle battery (9–16V) with sleep-mode current <10µA and wake-on-motion capability. IC Role / Device Role / Timing Role: Always-on 3.3V supply for MCU and RF SoC; enables fast wake-up from 3.8µA shutdown state. Use Value: Adjustable output supports multiple firmware-configurable voltages; 2mm × 2mm TDFN minimizes board area in slim-profile enclosures. |
| Industrial IoT Edge Gateway | Ruggedized HMI Power Subsystem |
Use Scenario: Wireless gateway aggregating Modbus and CAN data in oil & gas field instrumentation, exposed to wide ambient swings. IC Role / Device Role / Timing Role: Secondary regulator deriving 5V from 48V PoE++ or solar-charged battery for Ethernet PHY and flash memory. Use Value: 60V max input withstands load-dump transients; hiccup-mode protection prevents latch-up during cable fault events. |
Use Scenario: Touchscreen HMI in food processing line with frequent washdown cycles and condensation risk. IC Role / Device Role / Timing Role: Isolated 12V auxiliary rail for backlight LED driver and USB port power, derived from 24V main supply. Use Value: Programmable RT pin allows 400kHz operation to avoid audible noise in sensitive acoustic environments; RESET output validates rail integrity before display initialization. |
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 | Fixed 3.3V output only; 65V max input; 0.3A output current; requires external compensation. | Better suited for higher-current 3.3V rails where adjustable output is unnecessary and layout space permits larger inductor. | Select LMR36503RNXR if output voltage is fixed and >50mA load current is required; MAX17553CATA+ remains optimal for adjustable, ultra-compact, low-IQ designs. |
| TPS63020DSJR | Buck-boost topology; 1.8V–5.5V input; 3A output; 3.3V/5V fixed options only; no adjustable feedback. | Applicable where input voltage may dip below output (e.g., single-cell Li-ion backup); not suitable for 4V–60V industrial inputs. | Choose TPS63020DSJR only for battery-powered systems with collapsing input; MAX17553CATA+ is purpose-built for wide-input, low-IQ, adjustable industrial rails. |
Compared with LMR36503RNXR and TPS63020DSJR, the MAX17553CATA+ uniquely combines ultra-wide 4V–60V input, 0.8V adjustable reference, 3.8µA shutdown, and 2mm × 2mm footprint - making it irreplaceable for space-constrained, thermally demanding, and input-voltage-variable industrial point-of-load applications.
Availability
MAX17553CATA+ is available at Aetrix Electronics and suitable for factory automation sensor nodes, automotive aftermarket asset trackers, industrial IoT gateways, ruggedized HMI subsystems, and other applications requiring stable component supply across extended temperature and wide-input voltage ranges.
Supply support for MAX17553CATA+ 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 signal chain solutions.
The MAX17553 series belongs to Analog Devices' high-voltage DC-DC converter product line, designed specifically for space-constrained, wide-input industrial and automotive power rails where efficiency, reliability, and small solution size are critical.
FAQ
What output voltage range does the MAX17553CATA+ support?
The MAX17553CATA+ supports an adjustable output voltage from 0.8V up to 90% of the input voltage (VIN), enabled by its 0.8V ±1.25% internal feedback reference. This allows flexible generation of common rails like 3.3V, 5V, or 12V from inputs ranging from 4V to 60V. Unlike the fixed-output MAX17553A (3.3V) and MAX17553B (5V), the MAX17553CATA+ requires an external resistor divider from VOUT to GND connected to the FB/VO pin to set the desired output level.
Does the MAX17553CATA+ require external compensation components?
No, the MAX17553CATA+ features internal control loop compensation, eliminating the need for external Type-II or Type-III compensation networks. This simplifies design, reduces bill-of-materials cost, and improves layout robustness. The internal compensation is adaptive and optimized for the device's peak-current-mode architecture and integrated MOSFETs, ensuring stable operation across the full input/output range and temperature.
How does the MAX17553CATA+ handle light-load efficiency?
The MAX17553CATA+ maintains high light-load efficiency through discontinuous conduction mode (DCM) operation. When load current falls below the energy delivered in one minimum on-time pulse, the device skips switching cycles rather than forcing continuous operation. This reduces switching losses and preserves >85% efficiency even at 1mA load, making it ideal for battery-backed or intermittently active systems where standby power matters.
What protection features are integrated into the MAX17553CATA+?
The MAX17553CATA+ integrates multiple robust protection features: peak/valley current limiting (180mA/110mA typ), hiccup-mode overload response (64ms timeout), thermal shutdown at 160°C with 20°C hysteresis, and open-drain RESET output that asserts low if output voltage deviates beyond ±8% of regulation. These features eliminate the need for external fault-handling circuitry and ensure safe operation under short-circuit, overtemperature, and undervoltage conditions.
Can the MAX17553CATA+ be used with prebiased outputs?
Yes, the MAX17553CATA+ supports prebiased startup. When enabled into a precharged output, both high-side and low-side MOSFETs remain off until the internal soft-start ramp begins, preventing reverse current flow from the output into the converter. This avoids output voltage collapse or damage to downstream circuitry and ensures smooth, controlled ramp-up to the target regulated voltage - a critical feature for hot-swap and redundant power systems.
MAX17553CATA+ 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)
MAX17553CATA+ FAQ
1.How can I place an order for MAX17553CATA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17553CATA+ 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 MAX17553CATA+ reliable?
The price and inventory of MAX17553CATA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17553CATA+ is usually 5 days.
3.What payment methods are accepted for MAX17553CATA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17553CATA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17553CATA+?
MAX17553CATA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17553CATA+ 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 MAX17553CATA+?
For technical support, including MAX17553CATA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17553CATA+ requirements.
6.How does Aetrix verify that MAX17553CATA+ is sourced from the original manufacturer or authorized distributors?
All MAX17553CATA+ 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 MAX17553CATA+ meets industry standards.
7.What is the process for return or replacement of MAX17553CATA+?
All MAX17553CATA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17553CATA+, 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 MAX17553CATA+ part is unused and in its original packaging.
Return procedure for MAX17553CATA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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