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Analog Devices Inc./Maxim Integrated MAX17555BATA+T
- Part No.:
- MAX17555BATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN
- Datasheet:
-
MAX17555BATA+T.pdf
- Description:
- IC REG BUCK 5V 50MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,373
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Product details
Overview
MAX17555BATA+T from Analog Devices is a 60V-input, 5V-output, synchronous step-down DC-DC converter with integrated high-side p-MOSFET and low-side n-MOSFET, delivering up to 50mA load current, fixed 70kHz switching frequency, and 3.8µA shutdown current. It operates from 4V to 60V input, supports prebiased startup, and targets space-constrained industrial power rails.
For engineers reviewing the MAX17555BATA+T datasheet, MAX17555BATA+T pinout, MAX17555BATA+T application, or MAX17555BATA+T equivalent, this page delivers verified functional identity, confirmed TDFN-8 (2mm × 2mm) package mapping, validated pin roles including EN/UV, HYST, RESET, and FB/VO, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The MAX17555BATA+T implements peak-current mode control with internal slope compensation and fixed soft-start (0.8ms typ), enabling stable regulation across -40°C to +125°C ambient. Its architecture integrates error amplifier, PWM logic, high-side and low-side MOSFET drivers, and hiccup-mode overcurrent protection triggered after 16 consecutive peak-current limit events.
It features programmable enable/undervoltage lockout (EN/UV threshold: 1.215V typ rising, 1.09V typ falling) with external hysteresis via HYST pin, plus open-drain RESET output asserting low when FB/VO falls below 92% of regulation voltage - all implemented without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide industrial supply rails including 5V, 12V, 24V, and 48V systems with headroom for transients. |
| Output Voltage | Fixed 5V ±1.5% - factory-trimmed for precision; eliminates external feedback resistors in standard 5V PoL applications. |
| Max Load Current | 50mA - sufficient for powering microcontrollers, sensors, and interface ICs in ultra-low-power subsystems. |
| Switching Frequency | 70kHz ±10% - enables use of small, low-cost inductors while maintaining EMI compliance (CISPR32 Class B). |
| Shutdown Current | 3.8µA - minimizes battery drain in always-on monitoring circuits and asset trackers. |
| Thermal Shutdown | 160°C junction with 20°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
| Package | TDFN-8 (2mm × 2mm, 0.5mm pitch) - ultra-compact footprint ideal for space-limited modules and sensor nodes. |
Pinout & Package
MAX17555BATA+T is housed in an 8-pin TDFN package (2mm × 2mm, 0.5mm pitch, exposed pad), optimized for thermal performance (θJA = 162°C/W on 4-layer board) and minimal PCB area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power Input | Primary HV input node; requires local 1µF ceramic decoupling to GND for noise suppression and transient response. |
| 2 EN/UV | Enable / Undervoltage Lockout | Active-high digital enable with programmable turn-on/off thresholds; pulls device into <3.8µA shutdown when driven low. |
| 3 HYST | Hysteresis Programming | Connects externally to EN/UV to set input voltage hysteresis; enters Hi-Z when EN/UV > 1.215V, sinks 100µA when pulled low. |
| 4 GND | Ground Reference | Power ground return; must be connected to low-impedance ground plane and tied to all other GND pins at single point. |
| 5 FB/VO | Feedback / Bootstrap | For fixed-output variants like MAX17555BATA+T, directly connects to VOUT to close regulation loop and bootstrap internal circuitry. |
| 6 RESET | Open-Drain Power-Good | Asserts low when output drops <92% of 5V; releases Hi-Z 30µs after output rises >95% - provides reliable system reset signaling. |
| 7 GND | Ground Reference | Dedicated ground terminal; shares same net as Pin 4 but routed separately to reduce noise coupling in layout. |
| 8 LX | Switching Node | Connects to inductor switch node; high-impedance during shutdown; carries high di/dt pulses requiring short, wide trace routing. |
Key Features
| Feature | Design Value |
|---|---|
| No external compensation required | Internal control loop compensation eliminates need for external Type-II/III networks - reduces BOM count and layout sensitivity. |
| Synchronous FET integration | Integrated 5.4Ω high-side p-MOSFET and 1.5Ω low-side n-MOSFET eliminate Schottky loss and improve light-load efficiency in DCM. |
| Prebiased output startup | Prevents reverse current flow during startup into precharged outputs - essential for hot-swap and redundant power systems. |
| Discontinuous Conduction Mode (DCM) | Enables pulse-skipping at light loads to maintain >80% efficiency down to 1mA - critical for battery-backed IoT endpoints. |
| CISPR32 Class B compliance | Meets radiated emission limits without shielding or ferrites - simplifies EMC validation for industrial and automotive aftermarket designs. |
Applications
| Factory Automation Sensors | Automotive Asset Trackers |
|---|---|
Use Scenario: Powering temperature/humidity sensors and IO-Link masters in PLC cabinets where ambient reaches +85°C. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator supplying MCU, ADC, and isolated UART interfaces. Use Value: 4V–60V input range accommodates brownout conditions on 24V rails; -40°C to +125°C operation ensures reliability in uncooled enclosures. |
Use Scenario: Compact GPS/telematics units mounted under vehicle dashboards with limited airflow and wide input variation. IC Role / Device Role / Timing Role: Secondary 5V rail generator from 9–36V automotive battery, feeding GNSS module and cellular modem. Use Value: 2mm × 2mm TDFN footprint saves >40% board area vs. SOIC alternatives; 3.8µA shutdown extends battery life in sleep mode. |
| Industrial IoT Edge Nodes | Railway Signaling Interfaces |
Use Scenario: Wireless vibration monitors deployed on rotating machinery with intermittent solar charging and 12V nominal input. IC Role / Device Role / Timing Role: Regulator for ARM Cortex-M4 MCU, BLE radio, and MEMS accelerometer - must survive cold cranking dips. Use Value: 4V minimum input allows operation during engine start; built-in hiccup mode prevents thermal runaway during short-circuit faults. |
Use Scenario: Signal conditioning modules in trackside cabinets powered by 48V DC backup supplies subject to lightning-induced surges. IC Role / Device Role / Timing Role: Isolated 5V supply for RS-485 transceivers and optocoupled status inputs. Use Value: 60V absolute max rating withstands 50V transients per EN 50155; RESET output synchronizes firmware watchdog resets with power stability. |
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 |
|---|---|---|---|
| MAX17554BATA+T | 10V–60V input range; no EN/UV, HYST, or RESET pins; fixed 5V output; 146µA no-load current. | Lacks programmable enable and power-good signaling - suitable only for always-on, non-critical rails. | Select when input never drops below 10V and system-level reset management is handled externally. |
| TPS63900DSKR | 1.8V–5.5V input; 50mA max; 3.8µA quiescent; 2.5mm × 2.5mm WSON-10; integrated LDO bypass path. | Optimized for ultra-low-voltage battery systems - incompatible with 24V/48V industrial inputs. | Choose only for sub-6V battery-powered designs requiring dual-path buck-boost/LDO operation. |
Compared with MAX17554BATA+T and TPS63900DSKR, the MAX17555BATA+T uniquely combines 4V–60V operation, 5V fixed output, and full system supervision (EN/UV, HYST, RESET) in a 2mm × 2mm footprint - making it the sole option for compact, robust 5V PoL generation across harsh industrial voltage domains.
Availability
MAX17555BATA+T is available at Aetrix Electronics and suitable for factory automation sensors, automotive asset trackers, industrial IoT edge nodes, railway signaling interfaces, and embedded control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX17555BATA+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 with precision power, sensing, and conversion solutions.
The MAX17555BATA+T belongs to Analog Devices' ultra-small, high-voltage synchronous buck converter family, designed specifically for space-constrained industrial and automotive aftermarket applications demanding wide input range, low quiescent current, and integrated system supervision.
FAQ
What is the maximum input voltage the MAX17555BATA+T can safely handle?
The MAX17555BATA+T has an absolute maximum input voltage rating of +70V on the IN pin relative to GND. However, its specified operating input range is 4V to 60V. Sustained operation above 60V violates the device's functional specifications and may cause premature failure or parametric shift, even if within absolute maximum ratings. Always maintain VIN ≤ 60V for guaranteed performance and reliability in production designs using MAX17555BATA+T.
Does the MAX17555BATA+T require external compensation components?
No, the MAX17555BATA+T does not require external compensation components. It features fully internal control loop compensation, which eliminates the need for external Type-II or Type-III compensation networks. This simplifies design, reduces bill-of-materials cost, and improves layout robustness - a key differentiator versus controllers requiring external compensation. All stability is ensured across the full operating range of MAX17555BATA+T.
Can the MAX17555BATA+T be used with a prebiased output voltage?
Yes, the MAX17555BATA+T supports startup into a prebiased output. During prebiased startup, both high-side and low-side MOSFETs remain off until the internal reference ramps up, preventing reverse current flow from the output capacitor. This behavior is explicitly characterized and guaranteed across the -40°C to +125°C temperature range, making MAX17555BATA+T suitable for hot-swap and redundant power architectures where output voltage may already be present at enable time.
What is the purpose of the HYST pin on the MAX17555BATA+T?
The HYST pin on the MAX17555BATA+T enables programmable hysteresis for the enable/undervoltage lockout function. When connected via an external resistor to the EN/UV pin, HYST sets the difference between turn-on and turn-off input voltage thresholds - for example, turning on at 12V and turning off at 10V. This prevents oscillation during slow-rising or noisy input conditions. If unused, HYST must be tied to GND; floating it is not permitted in MAX17555BATA+T designs.
How does the RESET output on the MAX17555BATA+T behave during startup and fault conditions?
The RESET output on the MAX17555BATA+T is an open-drain signal that goes high-impedance 30µs after FB/VO rises above 95% of the 5V regulation voltage, indicating valid output. It asserts low when FB/VO drops below 92% of regulation, during EN/UV disable, or during hiccup-mode overcurrent protection. RESET remains low throughout the 64ms hiccup timeout period and resumes monitoring only after soft-start restarts - providing deterministic power-good sequencing for MAX17555BATA+T-based systems.
MAX17555BATA+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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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)
MAX17555BATA+T FAQ
1.How can I place an order for MAX17555BATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17555BATA+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 MAX17555BATA+T reliable?
The price and inventory of MAX17555BATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17555BATA+T is usually 5 days.
3.What payment methods are accepted for MAX17555BATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17555BATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17555BATA+T?
MAX17555BATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17555BATA+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 MAX17555BATA+T?
For technical support, including MAX17555BATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17555BATA+T requirements.
6.How does Aetrix verify that MAX17555BATA+T is sourced from the original manufacturer or authorized distributors?
All MAX17555BATA+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 MAX17555BATA+T meets industry standards.
7.What is the process for return or replacement of MAX17555BATA+T?
All MAX17555BATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17555BATA+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 MAX17555BATA+T part is unused and in its original packaging.
Return procedure for MAX17555BATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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