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Analog Devices Inc./Maxim Integrated MAX17553AATA+T
- Part No.:
- MAX17553AATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN
- Datasheet:
-
MAX17553AATA+T.pdf
- Description:
- IC REG BUCK ADJ 50MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,321
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Product details
Overview
MAX17553AATA+T 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 across a 4V–60V input range. It features fixed 3.3V output, internal compensation, 3.2ms soft-start, and operates in DCM for high light-load efficiency - deployed in factory automation power rails where compact size and thermal management are critical.
For engineers reviewing the MAX17553AATA+T datasheet, MAX17553AATA+T pinout, MAX17553AATA+T application, or MAX17553AATA+T equivalent, key selection considerations include its 8-pin TDFN (2mm × 2mm) package, ±1.5% output voltage accuracy over –40°C to +125°C, 91.5% full-load efficiency at 24VIN/5VOUT, hiccup-mode overload protection, and programmable switching frequency from 150kHz to 1.5MHz via external RT resistor.
Technical Context
The MAX17553AATA+T implements peak-current-mode control with fixed-frequency PWM operation down to minimum on-time of 105ns and minimum off-time of 95ns. Its internal error amplifier regulates FB/VO against a 3.3V reference (±1.5% over temperature), while adaptive loop compensation eliminates external compensation components.
It integrates robust protection: peak/valley current limiting (180mA/110mA typ), thermal shutdown at 160°C with 20°C hysteresis, and open-drain RESET monitoring with 95% rising / 92% falling thresholds. The EN/UV pin supports programmable undervoltage lockout with HYST pin for adjustable hysteresis, enabling precise input turn-on/off sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide industrial and automotive supply rails without pre-regulation. |
| Output Voltage | Fixed 3.3V ±1.5% (–40°C to +125°C) - stable rail for MCU I/O, sensors, and logic interfaces. |
| Max Output Current | 50mA - sufficient for low-power microcontrollers, transceivers, and analog front-ends. |
| Switching Frequency | 150kHz to 1.5MHz (programmable via RT pin) - enables optimization of size vs. EMI vs. efficiency. |
| Efficiency | 91.5% at 24VIN/5VOUT/full load - minimizes thermal stress in sealed enclosures. |
| Quiescent Current | 3.8µA in shutdown - preserves battery life in always-on monitoring systems. |
| Operating Temperature | –40°C to +125°C ambient - qualified for harsh industrial and under-hood automotive environments. |
Pinout & Package
MAX17553AATA+T is housed in an 8-pin TDFN package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; top-view pin numbering follows standard counter-clockwise orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power input supply | Accepts 4V–60V; requires local 1µF ceramic decoupling to GND for noise suppression and stability. |
| 2 EN/UV | Enable / undervoltage lockout input | Active-high enable; threshold 1.215V (rising), 1.09V (falling); pulls device into <3.8µA shutdown when low. |
| 3 HYST | Hysteresis programming terminal | Connected to EN/UV via resistor to set input voltage turn-on/turn-off differential; sinks 100µA max. |
| 4 RT | Frequency programming input | Connect resistor to GND to set fSW from 150kHz–1.5MHz; unconnected = 310kHz default. |
| 5 FB/VO | Feedback / boot-strap node | Direct connection to 3.3V output for regulation and internal VCC generation; 3.3V reference accuracy ±1.5%. |
| 6 RESET | Open-drain power-good output | Asserts low when VOUT drops below 92% of nominal; releases high-Z 30µs after VOUT exceeds 95%. |
| 7 GND | Power and signal ground | Must connect to low-impedance ground plane; serves as return for all currents including LX switching path. |
| 8 LX | Switching node | Drives external inductor; high-impedance during shutdown; requires short, low-inductance layout to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| No external Schottky diode required | Synchronous rectification using integrated p-MOSFET (5.4Ω RDS(on)) and n-MOSFET (1.5Ω RDS(on)) eliminates conduction loss and heat rise. |
| All-ceramic capacitor support | Enables ultra-compact layout with no electrolytic capacitors - improves reliability and lifetime in high-temp environments. |
| Internal soft-start (3.2ms typical) | Prevents input inrush current and output overshoot during startup, critical for shared supply rails. |
| Discontinuous Conduction Mode (DCM) | Maintains high efficiency at light loads (<10mA) by skipping pulses instead of forcing continuous switching. |
| CISPR32 Class B compliance | Meets radiated emission limits for industrial equipment without additional filtering - reduces system-level validation effort. |
Applications
| Factory Automation Sensor Node | Aftermarket Asset Tracker |
|---|---|
|
Use Scenario: Compact industrial sensor node powered from 24V DC bus, requiring isolated 3.3V for MCU, RS-485 transceiver, and analog sensor interface. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 24V bus to clean, regulated 3.3V with minimal thermal footprint. Use Value: 91.5% efficiency and DCM operation reduce self-heating in sealed enclosures; TDFN package saves >40% board area vs. SOIC alternatives. |
Use Scenario: Battery-powered GPS asset tracker mounted in vehicle cabin, operating from 9–36V automotive supply with cold-crank tolerance. IC Role / Device Role / Timing Role: Input-tolerant buck converter generating stable 3.3V for cellular modem and GNSS receiver under wide-vin transients. Use Value: 4V–60V input range handles cold-crank dips and load-dump surges; 3.8µA shutdown current extends battery life between location updates. |
| Industrial PLC I/O Module | Smart Building Controller |
|
Use Scenario: DIN-rail mounted PLC module with multiple isolated 3.3V domains for digital I/O conditioning and communication interfaces. IC Role / Device Role / Timing Role: Local regulator supplying 3.3V to isolated CAN transceivers and opto-coupler drivers within each I/O channel. Use Value: –40°C to +125°C ambient rating ensures reliable operation inside hot control cabinets; hiccup-mode protection prevents latch-up during field wiring faults. |
Use Scenario: Wireless HVAC controller powered from PoE-derived 48V or building 24V DC supply, needing efficient 3.3V for Wi-Fi SoC and environmental sensors. IC Role / Device Role / Timing Role: High-input-voltage buck converter enabling direct use of building infrastructure voltage without intermediate conversion stages. Use Value: 150kHz–1.5MHz frequency adjustability allows EMI tuning to avoid interference with 2.4GHz Wi-Fi bands; RESET output enables firmware health monitoring. |
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, 300mA output, 4V–65V input, 12-pin WSON (3mm × 2mm), higher current but larger footprint and no HYST pin. | Supports higher load currents; lacks programmable hysteresis and RESET monitoring - less suitable for fault-aware industrial nodes. | Choose LMR36503RNXR only if >50mA output current is required and board space permits larger package. |
| TPS54202HDDCR | 3.3V fixed, 2A output, 4.5V–28V input, 6-pin SOT-23, no internal MOSFETs - requires external high-side FET and compensation. | Lower input voltage ceiling; external FET increases BOM count and layout complexity; no integrated thermal/hiccup protection. | Choose TPS54202HDDCR only for cost-sensitive designs with tight input voltage constraints and design resources for external component selection. |
Compared with LMR36503RNXR and TPS54202HDDCR, the MAX17553AATA+T uniquely balances ultra-small size (2mm × 2mm), wide 4V–60V input, integrated protection (hiccup, thermal, RESET), and hysteresis-programmable EN/UV - making it optimal for space-constrained, high-reliability industrial point-of-load applications where 50mA suffices.
Availability
MAX17553AATA+T is available at Aetrix Electronics and suitable for factory automation sensor nodes, aftermarket asset trackers, industrial PLC I/O modules, smart building controllers, and other applications requiring stable component supply across extended temperature and wide-input-voltage conditions.
Supply support for MAX17553AATA+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX17553AATA+T belongs to Analog Devices' high-voltage synchronous buck regulator product line, designed specifically for compact, thermally constrained industrial and automotive point-of-load applications demanding wide VIN, high efficiency, and robust protection.
FAQ
What is the output voltage accuracy of the MAX17553AATA+T over temperature?
The MAX17553AATA+T delivers fixed 3.3V output with ±1.5% regulation accuracy across the full –40°C to +125°C ambient operating temperature range. This specification is guaranteed by design and characterization, not just tested at +25°C, ensuring stable performance in industrial enclosures and automotive under-hood environments where thermal gradients are extreme.
Does the MAX17553AATA+T require external compensation components?
No, the MAX17553AATA+T features internal control loop compensation optimized for all-ceramic capacitor designs. This eliminates external RC networks typically needed for stability, reducing BOM count, PCB area, and design validation effort - a key enabler of its "ultra-small" solution size claim.
Can the MAX17553AATA+T operate with a 3.6V input supply?
No - the absolute minimum input voltage for the MAX17553AATA+T is 4V. Attempting operation below 4V violates the Absolute Maximum Ratings and will prevent proper startup or regulation. For sub-4V applications, a different regulator architecture (e.g., boost or buck-boost) must be selected.
How does the RESET output of the MAX17553AATA+T behave during startup and fault conditions?
The RESET output of the MAX17553AATA+T remains low until the FB/VO voltage reaches 95% of 3.3V (3.135V), then transitions to high-impedance after a 30µs delay. It asserts low again if VOUT falls below 92% (3.036V) or if EN/UV is pulled low, providing reliable power-good signaling and fault indication for system-level monitoring.
Is the MAX17553AATA+T pin-compatible with other variants in the MAX17553 family?
Yes - the MAX17553AATA+T shares identical 8-pin TDFN (2mm × 2mm) packaging and pinout with MAX17553BATA+T (5V fixed) and MAX17553CATA+T (adjustable). This allows hardware reuse across output voltage variants, simplifying design migration and inventory management for multi-voltage platforms.
MAX17553AATA+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:
- 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+T FAQ
1.How can I place an order for MAX17553AATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17553AATA+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 MAX17553AATA+T reliable?
The price and inventory of MAX17553AATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17553AATA+T is usually 5 days.
3.What payment methods are accepted for MAX17553AATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17553AATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17553AATA+T?
MAX17553AATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17553AATA+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 MAX17553AATA+T?
For technical support, including MAX17553AATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17553AATA+T requirements.
6.How does Aetrix verify that MAX17553AATA+T is sourced from the original manufacturer or authorized distributors?
All MAX17553AATA+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 MAX17553AATA+T meets industry standards.
7.What is the process for return or replacement of MAX17553AATA+T?
All MAX17553AATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17553AATA+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 MAX17553AATA+T part is unused and in its original packaging.
Return procedure for MAX17553AATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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