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Analog Devices Inc./Maxim Integrated MAX17502FATB+
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- Part No.:
- MAX17502FATB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17502FATB+.pdf
- Description:
- IC REG BUCK 5V 1A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,700
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Product details
Overview
MAX17502FATB+ from Maxim Integrated is a 60V input, 5V fixed-output synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS power switches, delivering up to 1A continuous load current, ±1.7% output voltage accuracy over –40°C to +125°C, and 600kHz fixed switching frequency - used in industrial power rails for base station power management.
For engineers reviewing the MAX17502FATB+ datasheet, MAX17502FATB+ pinout, MAX17502FATB+ application, or MAX17502FATB+ equivalent, key selection criteria include its 4.5V–60V wide input range, internal compensation for fixed 5V output, 0.9µA shutdown current, hiccup-mode overcurrent protection, and TDFN-10 (3mm × 2mm) package suitability for space-constrained industrial point-of-load designs.
Technical Context
The MAX17502FATB+ 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 dual-MOSFET power stage features 0.85Ω high-side pMOS and 0.35Ω low-side nMOS on-resistance at +25°C, enabling >90% peak efficiency at full load.
It integrates a 5V LDO (VCC) with 40mA sourcing capability, resistor-programmable EN/UVLO threshold (1.218V typ rising), open-drain RESET with 92.5% undervoltage trip and 1024-cycle delay, and adjustable soft-start via external capacitor - all operating across –40°C to +125°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial input sources including 24V/48V DC distribution and battery-backed systems. |
| Output Voltage | Fixed 5.0V ±1.7% - eliminates external feedback resistors; accurate across full temperature range. |
| Max Output Current | 1A continuous - sufficient for powering FPGAs, microcontrollers, and analog front-ends in embedded systems. |
| Switching Frequency | 600kHz (typ) - enables compact magnetics and reduces output ripple without compromising EMI performance. |
| Shutdown Current | 0.9µA (typ) - minimizes standby power loss in always-on industrial monitoring nodes. |
| Thermal Shutdown | 165°C junction with 10°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Package | TDFN-10 (3mm × 2mm, 0.75mm height) - ultra-small footprint with exposed pad for enhanced thermal dissipation. |
Pinout & Package
TDFN-10 (3mm × 2mm) package with exposed thermal pad (EP) connected to GND; 10-pin configuration optimized for minimal board area and efficient heat transfer to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for LX switch node; must be tied directly to power ground plane under IC. |
| 2 VIN | Main Input Supply | Accepts 4.5V–60V; requires ≥2.2µF ceramic input capacitance near pin for stability and ripple suppression. |
| 3 EN/UVLO | Enable / Input UVLO Control | Resistor-divider programmable turn-on threshold (1.218V typ); pull high to VIN for always-on operation. |
| 4 VCC | Internal 5V LDO Output | Bypass with 1µF ceramic to GND; powers internal logic and low-side gate driver; shuts down if VCC < 3.7V. |
| 5 FB/VO | Feedback Input | Internally connected to 5V reference divider; connect directly to output for fixed 5V regulation. |
| 6 SS | Soft-Start Timing | Capacitor-to-GND sets inrush current ramp time; typical CSS = 3300pF for ~18ms soft-start. |
| 7 N.C./COMP | No Connect (Fixed Output) | Not connected internally for MAX17502F; leave unconnected - no external compensation required. |
| 8 RESET | Open-Drain Power-Good | Pulls low when VOUT < 92.5% of 5V; rises after 1024 cycles once VOUT > 95.5%; requires external pull-up. |
| 9 GND | Analog Ground | Reference for FB, SS, COMP; tie to PGND at single-point star ground near VCC bypass capacitor. |
| 10 LX | Switching Node | Connects to inductor; carries high di/dt; requires short, low-inductance trace to minimize EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | Eliminates external Schottky diode and reduces conduction losses - enables >90% peak efficiency at 1A with all-ceramic output capacitors. |
| Internal Compensation (Fixed 5V) | Removes need for external RC network on COMP pin - simplifies layout and improves production consistency for 5V output variants. |
| Hiccup-Mode Overcurrent Protection | Triggers after single runaway current event (1.7A typ) or sustained VOUT drop to 71.14%, then suspends switching for 32,768 cycles - limits thermal stress during short-circuit faults. |
| Prebiased Power-Up Support | Prevents reverse current flow into precharged output rail - avoids damaging downstream circuitry during hot-insertion or backup supply switchover. |
| Industrial Temperature Range | Full functionality from –40°C to +125°C ambient (–40°C to +150°C junction) - validated for harsh environments like HVAC controllers and telecom base stations. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering PLC I/O modules and sensor signal conditioners in factory automation cabinets with 24V DC bus. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator converting unregulated 24V field supply to clean, stable 5V for microcontroller and ADC subsystems. Use Value: 60V max input withstands load-dump transients; ±1.7% accuracy ensures reliable ADC reference and digital logic timing margins. | Use Scenario: Supplying 5V to thermostats, damper actuators, and BACnet communication interfaces in commercial HVAC systems. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC stage replacing linear regulators to reduce heat buildup inside enclosed control panels. Use Value: 0.9µA shutdown current extends battery backup runtime; TDFN-10 footprint fits tight space constraints behind wall-mounted units. |
| Base Station Power Management | Home Theatre AV Equipment |
Use Scenario: Generating 5V for RF front-end biasing, clock distribution, and FPGA configuration in remote radio units (RRUs). IC Role / Device Role / Timing Role: Secondary regulated rail derived from 48V telecom supply; provides low-noise, fast-transient 5V for sensitive analog and digital blocks. Use Value: 600kHz switching enables small 2.2µH inductors; hiccup-mode protection prevents latch-up during antenna VSWR fault events. | Use Scenario: Delivering 5V to HDMI interface ICs, audio DSPs, and display controllers in compact AV receivers and soundbars. IC Role / Device Role / Timing Role: High-efficiency buck converter replacing discrete solutions to meet ENERGY STAR standby power requirements. Use Value: All-ceramic capacitor support eliminates electrolytic aging; 90%+ efficiency reduces thermal load in sealed enclosures. |
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 |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5V–65V input, 5V fixed, 1A, 600kHz, AEC-Q100 qualified; higher 1.25V EN threshold, no integrated VCC LDO. | Automotive-grade only; requires external 5V bias for gate drive; less suitable for industrial ambient above +105°C. | Select LM5164QDDARQ1 only for automotive designs requiring AEC-Q100 qualification and 65V input margin. |
| TPS54160DGQR | 3.5V–60V input, adjustable output, 1.5A, 1.6MHz, no internal MOSFETs; requires external high-side/low-side FETs and compensation. | Higher current but greater BOM count and layout complexity; lacks RESET, soft-start, and internal VCC. | Choose TPS54160DGQR when adjustable output and higher current are needed, and design resources allow external FET selection and loop tuning. |
Compared with LM5164QDDARQ1 and TPS54160DGQR, the MAX17502FATB+ delivers plug-and-play 5V regulation with integrated power FETs, internal VCC LDO, and industrial-temperature RESET signaling - reducing component count and validation effort for fixed-output industrial power rails.
Availability
MAX17502FATB+ is available at Aetrix Electronics and suitable for industrial process control, HVAC system power supplies, and telecom base station point-of-load applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX17502FATB+ 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+ belongs to Maxim's high-voltage synchronous buck regulator product line, engineered for rugged industrial point-of-load conversion where wide input range, small size, and reliability across extreme temperatures are critical.
FAQ
What is the maximum input voltage rating for the MAX17502FATB+?
The MAX17502FATB+ has an absolute maximum input voltage rating of +70V, but its specified operational input voltage range is 4.5V to 60V. Exceeding 60V may cause functional instability or reduced lifetime, even if within absolute maximum ratings. The device is designed for industrial 24V/48V DC systems and battery inputs with transient tolerance up to 60V continuous.
Does the MAX17502FATB+ require external compensation components?
No, the MAX17502FATB+ does not require external compensation components. As a fixed 5V output variant, it uses internal compensation - the N.C./COMP pin (Pin 7) is unconnected and must remain floating. This eliminates loop-tuning effort and improves design reproducibility compared to adjustable-output regulators.
How does the RESET pin function on the MAX17502FATB+?
The RESET pin on the MAX17502FATB+ is an open-drain output that asserts low when the FB voltage falls below 92.5% of 5V (i.e., 4.625V), and releases high 1024 switching cycles after FB rises above 95.5% of 5V (4.775V). It requires an external pull-up resistor and remains valid only when EN/UVLO is high and VIN > 4.5V - providing precise power-good sequencing for downstream logic.
Can the MAX17502FATB+ start up into a precharged output?
Yes, the MAX17502FATB+ supports prebiased startup: both high-side and low-side MOSFETs remain off until the first PWM pulse is commanded, preventing reverse current flow into a precharged output rail. This feature protects downstream circuitry during hot-swap or redundant supply transitions and is enabled by default - no configuration required.
What thermal derating applies to the MAX17502FATB+ in a multilayer PCB?
In a standard four-layer PCB per JEDEC JESD51-7, the MAX17502FATB+ (TDFN-10) has θJA = 67.3°C/W. At ambient temperatures above +70°C, power dissipation must be derated by 14.9mW/°C. For example, at +90°C ambient, maximum continuous power dissipation drops to 1188.7mW − (20°C × 14.9mW/°C) = 890.7mW - limiting practical 1A operation to lower VIN or improved heatsinking.
MAX17502FATB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Strip
- 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+ FAQ
1.How can I place an order for MAX17502FATB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17502FATB+ 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+ reliable?
The price and inventory of MAX17502FATB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17502FATB+ is usually 5 days.
3.What payment methods are accepted for MAX17502FATB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17502FATB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17502FATB+?
MAX17502FATB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17502FATB+ 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+?
For technical support, including MAX17502FATB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17502FATB+ requirements.
6.How does Aetrix verify that MAX17502FATB+ is sourced from the original manufacturer or authorized distributors?
All MAX17502FATB+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX17502FATB+?
All MAX17502FATB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17502FATB+, 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+ part is unused and in its original packaging.
Return procedure for MAX17502FATB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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