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Analog Devices Inc./Maxim Integrated MAX17502FATB+T
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- Part No.:
- MAX17502FATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17502FATB+T.pdf
- Description:
- IC REG BUCK 5V 1A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,239
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Product details
Overview
MAX17502FATB+T from Maxim Integrated is a 60V input, 1A synchronous step-down DC-DC converter with fixed 5V output, integrated high-side pMOS and low-side nMOS power switches, ±1.7% output voltage accuracy over –40°C to +125°C, and 600kHz switching frequency. It delivers regulated 5V power in industrial process control systems where wide-input-voltage resilience and compact layout are critical.
For engineers reviewing the MAX17502FATB+T datasheet, MAX17502FATB+T pinout, MAX17502FATB+T application, or MAX17502FATB+T equivalent, key selection factors include its 4.5V–60V input range, internal compensation for fixed 5V output, programmable EN/UVLO threshold, open-drain RESET with 92.5%/95.5% VOUT monitoring thresholds, and TDFN-10 (3mm × 2mm) package with exposed pad for thermal management.
Technical Context
The MAX17502FATB+T employs peak-current-mode control with fixed-frequency PWM, using an internal transconductance error amplifier (GM = 590µS typ) and slope compensation to stabilize regulation. Its high-side pMOS (RDS-ONH = 0.85Ω typ at +25°C) and low-side nMOS (RDS-ONL = 0.35Ω typ at +25°C) enable >90% peak efficiency without external Schottky diodes.
It integrates a 5V LDO (VCC) with 40mA current limit and 3.7V UVLO, a resistor-programmable EN/UVLO (1.218V rising threshold), adjustable soft-start via SS pin (5µA charging current), and hiccup-mode overcurrent protection triggered by either 1.7A runaway current limit or VOUT falling below 71.14% of nominal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports direct connection to unregulated industrial rails, battery stacks, or PoE-powered infrastructure without pre-regulation. |
| Output Voltage | Fixed 5.0V ±1.7% - eliminates external feedback resistors; enables plug-and-play integration into 5V logic, MCU, or peripheral power domains. |
| Max Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained embedded systems. |
| Switching Frequency | 600kHz (typ) - allows use of small, low-profile inductors (e.g., 4.7µH) and reduces output ripple without increasing EMI filtering complexity. |
| Efficiency (Peak) | >90% - minimizes thermal load in sealed enclosures and extends battery life in portable equipment. |
| Shutdown Current | 0.9µA (typ) - enables ultra-low-power standby modes in always-on IoT edge nodes. |
| Operating Temp Range | –40°C to +125°C ambient - qualified for under-hood automotive auxiliary supplies and industrial motor drives. |
Pinout & Package
MAX17502FATB+T is housed in a 10-pin TDFN package (3mm × 2mm) with exposed thermal pad (EP), optimized for high-density PCB layouts and efficient heat dissipation in thermally constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power Ground | Low-impedance return path for high-current LX switching node; must be connected directly to power ground plane and tied to GND at VCC bypass capacitor. |
| VIN (Pin 2) | Main Input Supply | Accepts 4.5V–60V DC input; requires ≥2.2µF ceramic input capacitance close to pin for stability and EMI suppression. |
| EN/UVLO (Pin 3) | Enable / Input Undervoltage Lockout | Resistor-divider programmable turn-on threshold (1.218V rising); pull high to VIN for always-on operation. |
| VCC (Pin 4) | Internal 5V LDO Output | Supplies internal circuitry and low-side gate driver; must be bypassed with 1µF ceramic capacitor to GND. |
| FB/VO (Pin 5) | Feedback Input | Internally connected to 5V reference divider; connect directly to output capacitor for fixed 5V regulation. |
| LX (Pin 6) | Switching Node | Connects to inductor switch node; high-impedance during shutdown; requires low-inductance layout to minimize ringing. |
| GND (Pin 7) | Analog Ground | Reference for internal analog blocks; tie to PGND at single-point star ground near VCC capacitor. |
| RESET (Pin 8) | Open-Drain Power-Good Signal | Pulls low when VOUT drops below 92.5% of 5V; rises after 1024 cycles once VOUT exceeds 95.5% - used for system sequencing and fault detection. |
| N.C./COMP (Pin 9) | No Connect (Fixed-Output Version) | Not internally connected on MAX17502F; must remain unconnected - no compensation network required. |
| SS (Pin 10) | Soft-Start Timing Input | Capacitor-to-GND sets ramp time; 3300pF yields ~18ms soft-start - prevents input inrush and output overshoot during power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | Eliminates external Schottky diode and reduces BOM count; achieves >90% efficiency at full load with minimal thermal footprint. |
| Internal Compensation (5V Fixed) | Removes need for external RC compensation network - simplifies design validation and reduces layout sensitivity. |
| All-Ceramic Capacitor Support | Enables fully ceramic input (2.2µF) and output (10µF 1210) capacitor designs - improves reliability and temperature stability vs. electrolytics. |
| Hiccup-Mode Overcurrent Protection | Shuts down for 32,768 clock cycles upon short-circuit or overload - limits average power dissipation and prevents thermal runaway. |
| Prebiased Power-Up Capability | Starts safely into existing 5V rail without sinking current - essential for hot-swap and redundant power supply applications. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering PLC I/O modules and field transmitters in factory automation cabinets with 24V/48V DC bus inputs. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting unregulated 48V rail to stable 5V for microcontroller, ADC, and digital isolator supply. Use Value: Wide 4.5V–60V input range accommodates bus voltage sag and surge; ±1.7% accuracy ensures sensor measurement integrity across –40°C to +85°C operating range. | Use Scenario: Providing 5V bias to smart thermostats, damper actuators, and environmental sensors deployed in commercial HVAC ductwork. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC stage delivering regulated 5V from 24V HVAC control bus. Use Value: TDFN-10 package fits tight mechanical envelopes; hiccup-mode protection handles intermittent short circuits from actuator wiring faults. |
| Base Station & Telecom | Battery-Powered Equipment |
Use Scenario: Generating 5V for FPGA configuration, Ethernet PHY, and management controllers in remote radio units (RRUs) powered from 48V telecom rectifiers. IC Role / Device Role / Timing Role: Secondary regulator supplying isolated 5V domain from primary 48V intermediate bus. Use Value: 600kHz switching enables small 4.7µH inductors; >90% efficiency reduces heat buildup inside sealed outdoor enclosures. | Use Scenario: Powering portable test instruments, handheld meters, and wireless sensor nodes operating from 12V–36V Li-ion or lead-acid battery packs. IC Role / Device Role / Timing Role: Main system regulator delivering 5V to MCU, display, and RF subsystems with ultra-low shutdown current. Use Value: 0.9µA shutdown current extends battery shelf life; prebiased start-up avoids brownout during battery hot-swap events. |
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 |
|---|---|---|---|
| LM5164QDRCRQ1 | Automotive-grade AEC-Q100, 65V max input, 1A, 600kHz, but requires external compensation and feedback resistors for 5V output. | Targeted for automotive infotainment and ADAS; lacks integrated 5V feedback divider and RESET functionality. | Select LM5164QDRCRQ1 only if AEC-Q100 qualification and extended temperature range (–40°C to +150°C) are mandatory. |
| TPS54160DGQR | 60V input, 1.5A, 1.6MHz, but uses external MOSFETs and requires more external components; no integrated RESET or EN/UVLO programming. | Designed for higher-current, cost-sensitive industrial supplies; lacks prebias start-up and hiccup-mode protection. | Choose TPS54160DGQR when higher output current headroom and faster transient response are needed, and board area is less constrained. |
Compared with LM5164QDRCRQ1 and TPS54160DGQR, the MAX17502FATB+T provides a complete, component-minimized 5V solution with built-in RESET, programmable EN/UVLO, and prebias capability - reducing design cycle time and validation effort for industrial and telecom point-of-load applications.
Availability
MAX17502FATB+T is available at Aetrix Electronics and suitable for industrial process control, HVAC and building control, and base station power conversion requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX17502FATB+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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX17502FATB+T belongs to Maxim's high-voltage synchronous buck regulator family, engineered for reliable, compact, and efficient point-of-load conversion in harsh environments where wide input range and thermal resilience are critical.
FAQ
What is the output voltage tolerance of the MAX17502FATB+T over temperature?
The MAX17502FATB+T maintains output voltage accuracy within ±1.7% over the full –40°C to +125°C ambient operating temperature range. This specification is guaranteed across process, voltage, and temperature (PVT) corners and verified by production testing at +25°C with characterization over temperature - ensuring consistent 5V regulation for sensitive logic and analog circuitry in demanding environments.
Does the MAX17502FATB+T require external compensation components?
No, the MAX17502FATB+T does not require external compensation components. As a fixed 5V output variant, it incorporates internal compensation circuitry optimized for stability with standard ceramic output capacitors. The N.C./COMP pin (Pin 9) is unconnected and must remain floating - eliminating loop compensation design effort and layout sensitivity typical of adjustable regulators.
How is the soft-start time configured on the MAX17502FATB+T?
The soft-start time on the MAX17502FATB+T is set by connecting a capacitor from the SS pin (Pin 10) to GND. With a typical SS charging current of 5µA, a 3300pF capacitor yields approximately 18ms soft-start duration. This controlled ramp prevents input inrush current and output voltage overshoot during power-up, especially critical when driving large output capacitance or downstream LDOs.
What protection features does the MAX17502FATB+T include?
The MAX17502FATB+T integrates hiccup-mode overcurrent protection (triggered by 1.7A runaway current limit or VOUT dropping to 71.14%), thermal shutdown (+165°C trip with 10°C hysteresis), output undervoltage lockout (via RESET pin), and input undervoltage lockout (programmable EN/UVLO). These features collectively safeguard the IC and system during fault conditions without requiring external supervision circuitry.
Can the MAX17502FATB+T start up into a precharged 5V output rail?
Yes, the MAX17502FATB+T supports prebiased power-up. When enabled into an existing 5V rail, both high-side and low-side MOSFETs remain off until the first PWM pulse is commanded, preventing reverse current flow from the output. This feature ensures safe hot-swap operation and compatibility with redundant or backup power architectures where the output may already be biased before the IC is enabled.
MAX17502FATB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-WFDFN Exposed Pad
- 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):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (3x2)
MAX17502FATB+T FAQ
1.How can I place an order for MAX17502FATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17502FATB+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 MAX17502FATB+T reliable?
The price and inventory of MAX17502FATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17502FATB+T is usually 5 days.
3.What payment methods are accepted for MAX17502FATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17502FATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17502FATB+T?
MAX17502FATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17502FATB+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 MAX17502FATB+T?
For technical support, including MAX17502FATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17502FATB+T requirements.
6.How does Aetrix verify that MAX17502FATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17502FATB+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 MAX17502FATB+T meets industry standards.
7.What is the process for return or replacement of MAX17502FATB+T?
All MAX17502FATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17502FATB+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 MAX17502FATB+T part is unused and in its original packaging.
Return procedure for MAX17502FATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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