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Analog Devices Inc./Maxim Integrated MAX17555CATA+T
- Part No.:
- MAX17555CATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN
- Datasheet:
-
MAX17555CATA+T.pdf
- Description:
- IC REG BUCK ADJ 50MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,683
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Product details
Overview
MAX17555CATA+T from Analog Devices is a 60V-input, 50mA synchronous step-down DC-DC converter in an 8-pin TDFN (2mm × 2mm) package, featuring adjustable output (0.8V to 90% of VIN), 70kHz fixed switching frequency, 3.8µA shutdown current, and integrated high-side p-MOSFET (5.4Ω typ) and low-side n-MOSFET (1.5Ω typ). It delivers compact, high-efficiency power conversion for industrial sensors and asset-tracking modules.
For engineers reviewing the MAX17555CATA+T datasheet, MAX17555CATA+T pinout, MAX17555CATA+T application, or MAX17555CATA+T equivalent, key selection criteria include its 4V–60V input range, programmable EN/UV and HYST thresholds, open-drain RESET output for power-good monitoring, and DCM operation enabling high light-load efficiency in space-constrained designs.
Technical Context
The MAX17555CATA+T implements peak-current mode control with internal slope compensation and fixed soft-start (0.8ms typ). Its architecture supports discontinuous conduction mode (DCM) to maintain high efficiency at light loads, with pulse-skipping when demand falls below minimum on-time energy.
It integrates dual MOSFETs, internal loop compensation, and robust protection including hiccup-mode overcurrent (210mA peak limit), thermal shutdown (160°C), and CISPR32 Class B compliance - all within a -40°C to +125°C ambient operating range and -40°C to +150°C junction temperature envelope.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - enables direct connection to 5V, 12V, 24V, and 48V industrial rails without pre-regulation. |
| Output Current | Up to 50mA - sufficient for powering microcontrollers, analog front-ends, and low-power wireless transceivers. |
| Switching Frequency | Fixed 70kHz - simplifies EMI filtering design and avoids audible noise; stable across temperature and load. |
| Shutdown Current | 3.8µA - minimizes system standby power in battery-backed or energy-harvesting applications. |
| Feedback Regulation Accuracy | ±1.25% over -40°C to +125°C - ensures precise output voltage stability in harsh environments. |
| Operating Temperature | -40°C to +125°C ambient - qualified for factory automation, automotive aftermarket, and outdoor IoT deployments. |
| Package | 8-pin TDFN, 2mm × 2mm - ultra-small footprint with exposed pad for thermal performance; compatible with standard reflow profiles. |
Pinout & Package
MAX17555CATA+T uses an 8-pin TDFN package (2mm × 2mm, outline 21-0487) with exposed thermal pad. Pin 1 is top-left corner (marked dot), pin numbering clockwise. GND pins (2,3,4,7) must be connected to a low-impedance ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power input | Accepts 4V–60V supply; requires local 1µF ceramic decoupling to GND for noise suppression and transient response. |
| 2 EN/UV | Enable / undervoltage lockout | Active-high logic input; threshold 1.215V (rising); enables device startup only above user-defined VIN level. |
| 3 HYST | Hysteresis programming | Connects to EN/UV via external resistor to set turn-on/turn-off voltage differential; prevents oscillation during brownout. |
| 4 GND | Ground reference | Primary power ground return; connects to PCB ground plane; multiple GND pins reduce impedance and improve thermal dissipation. |
| 5 FB/VO | Feedback / boot-strap node | Adjusts output voltage via external resistor divider (0.8V to 90% VIN); also supplies internal bias for gate drivers. |
| 6 RESET | Open-drain power-good output | Asserts low when VOUT drops below 92% of regulation; releases high-impedance after 30µs when VOUT exceeds 95%. |
| 7 GND | Ground reference | Secondary ground connection; ties to same ground plane as Pin 4 for low-noise feedback path integrity. |
| 8 LX | Switching node | Connects directly to inductor; carries high di/dt pulses; requires short, wide trace to minimize EMI and voltage ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous FETs | Eliminates need for external Schottky diode and reduces solution size by >30% versus discrete buck controllers. |
| Programmable EN/UV and HYST | Enables precise input-voltage sequencing and brownout recovery without external comparators or timers. |
| Open-drain RESET output | Provides system-level power-good signal for MCU reset or supervisor ICs, eliminating need for external voltage monitor. |
| Internal loop compensation | Reduces BOM count by removing external compensation network; ensures stable operation with all-ceramic output capacitors. |
| Discontinuous Conduction Mode (DCM) | Maintains >85% efficiency at 1mA load, critical for always-on sensor nodes and low-duty-cycle telemetry devices. |
Applications
| Industrial Sensor Node | Automotive Asset Tracker |
|---|---|
|
Use Scenario: Powering MEMS accelerometers, temperature sensors, and LoRaWAN transceivers in unattended factory-floor deployments. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 24V plant bus to 3.3V for mixed-signal SoCs and RF ICs. Use Value: 3.8µA shutdown current extends battery life in maintenance-free installations; DCM maintains efficiency across 10µA–50mA dynamic load range. |
Use Scenario: Compact GPS/GNSS tracking units mounted in vehicle OBD-II ports or under-hood enclosures. IC Role / Device Role / Timing Role: Input-stage buck converter accepting 5V–36V automotive battery transients while delivering regulated 5V to MCU and cellular modem. Use Value: 60V absolute max rating withstands load-dump spikes; -40°C to +125°C rating ensures reliability in under-hood thermal cycling. |
| Smart Meter Auxiliary Rail | IIoT Edge Controller Power |
|
Use Scenario: Generating isolated auxiliary 3.3V rail for metrology ADCs and real-time clocks in polyphase electricity meters. IC Role / Device Role / Timing Role: Secondary regulator fed from isolated DC-DC; provides low-noise, tightly regulated supply independent of main power path. Use Value: ±1.25% output accuracy over temperature ensures consistent ADC reference stability; CISPR32 Class B compliance meets metering EMC standards. |
Use Scenario: Powering ARM Cortex-M7-based edge controllers in modular PLC backplanes with variable input voltage. IC Role / Device Role / Timing Role: Flexible POL converter supporting multiple output voltages (via FB divider) across different module variants. Use Value: Adjustable output (0.8V–54V) enables single-BOM reuse across 3.3V, 5V, and 12V controller versions; TDFN package fits dense backplane layouts. |
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 |
|---|---|---|---|
| LMR36520RNXR | 65V input, 200mA output, 2.1MHz switching; larger package (10-pin WSON); no RESET or HYST pins. | Better suited for higher-current applications but lacks programmable UVLO hysteresis and power-good signaling. | Select LMR36520RNXR only if >50mA load current or faster transient response is required; MAX17555CATA+T remains optimal for ultra-low-quiescent, feature-rich 50mA designs. |
| TPS562211DDFR | 17V input max, 2A output, 650kHz; integrated compensation; no EN/UV hysteresis or RESET. | Targeted at low-voltage consumer electronics; insufficient input range for industrial 24V/48V systems. | TPS562211DDFR is not suitable for 4V–60V input applications; MAX17555CATA+T is the only option among these three meeting full industrial input voltage and feature requirements. |
Compared with LMR36520RNXR and TPS562211DDFR, MAX17555CATA+T uniquely combines ultra-wide input range (4V–60V), sub-4µA shutdown, programmable hysteresis, and open-drain RESET in a 2mm × 2mm package - making it irreplaceable for compact, high-reliability industrial POL designs requiring full system supervision.
Availability
MAX17555CATA+T is available at Aetrix Electronics and suitable for factory automation sensors, automotive asset trackers, smart meter auxiliary rails, IIoT edge controllers, and other applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX17555CATA+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 technologies, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX17555CATA+T belongs to Analog Devices' MAX175xx family of ultra-small, high-voltage synchronous buck converters - designed specifically for space-constrained, high-reliability industrial and automotive applications demanding wide input range, low quiescent current, and integrated protection features.
FAQ
What is the maximum input voltage the MAX17555CATA+T can safely handle?
The MAX17555CATA+T has an absolute maximum input voltage rating of +70V, with continuous operation specified from 4V to 60V. Exceeding 60V may trigger overvoltage protection or cause permanent damage. For automotive load-dump scenarios up to 65V, derating or external clamping is recommended. Always verify actual system transients against the 70V absolute max rating before final design sign-off.
Does the MAX17555CATA+T support prebiased output startup?
Yes, the MAX17555CATA+T supports prebiased output startup. During startup into a precharged output, both high-side and low-side MOSFETs remain off until the internal reference ramps up, preventing reverse current flow and ensuring smooth voltage ramp-up. This behavior is confirmed in the Functional Description section of the official datasheet and applies identically to MAX17555CATA+T across all output configurations.
Can the MAX17555CATA+T operate in continuous conduction mode (CCM)?
No - the MAX17555CATA+T is optimized for discontinuous conduction mode (DCM) operation across its entire load range to maximize light-load efficiency. Its control architecture, minimum on-time (80ns), and valley current limit (22mA typ in steady state) are designed to enforce DCM. Attempting CCM via large inductors or heavy loads will trigger hiccup-mode overcurrent protection rather than stable CCM operation.
What is the purpose of the HYST pin on the MAX17555CATA+T?
The HYST pin on the MAX17555CATA+T allows precise setting of hysteresis between turn-on and turn-off thresholds of the EN/UV pin. When connected to EN/UV via an external resistor, HYST enables programmable input-voltage window control - for example, turning on at 12V and off at 10.5V - preventing oscillation during slow-rising or noisy input conditions. This function is exclusive to MAX17555 variants and not available on MAX17554.
Is the MAX17555CATA+T RoHS compliant and lead-free?
Yes, the MAX17555CATA+T is RoHS compliant and lead-free. The "+T" suffix in the part number indicates tape-and-reel packaging with lead-free (Pb-free) termination per JEDEC J-STD-020. Package code T822CN+1 confirms RoHS status, and the device meets EU Directive 2011/65/EU requirements. Full compliance documentation is available through Analog Devices' product change notifications and material declarations.
MAX17555CATA+T 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:
- 70kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x2)
MAX17555CATA+T FAQ
1.How can I place an order for MAX17555CATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17555CATA+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 MAX17555CATA+T reliable?
The price and inventory of MAX17555CATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17555CATA+T is usually 5 days.
3.What payment methods are accepted for MAX17555CATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17555CATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17555CATA+T?
MAX17555CATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17555CATA+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 MAX17555CATA+T?
For technical support, including MAX17555CATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17555CATA+T requirements.
6.How does Aetrix verify that MAX17555CATA+T is sourced from the original manufacturer or authorized distributors?
All MAX17555CATA+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 MAX17555CATA+T meets industry standards.
7.What is the process for return or replacement of MAX17555CATA+T?
All MAX17555CATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17555CATA+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 MAX17555CATA+T part is unused and in its original packaging.
Return procedure for MAX17555CATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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