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Analog Devices Inc./Maxim Integrated MAX17502GATB+T
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- Part No.:
- MAX17502GATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17502GATB+T.pdf
- Description:
- IC REG BUCK ADJ 1A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,143
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Product details
Overview
MAX17502GATB+T from Maxim Integrated is a 60V input, 1A synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, fixed 3.3V output (G variant), ±1.7% output voltage accuracy over –40°C to +125°C, 600kHz switching frequency, and TDFN-10 (3mm × 2mm) package. It delivers regulated power in industrial process control, telecom power supplies, and battery-powered equipment requiring compact, high-efficiency conversion.
For engineers reviewing the MAX17502GATB+T datasheet, MAX17502GATB+T pinout, MAX17502GATB+T application, or MAX17502GATB+T equivalent, key selection criteria include its 4.5V–60V wide input range, internal MOSFETs eliminating external Schottky diodes, programmable EN/UVLO threshold, open-drain RESET with 92.5%/95.5% VOUT monitoring thresholds, and support for all-ceramic capacitor designs in ultra-small layouts.
Technical Context
The MAX17502GATB+T implements peak-current-mode control with fixed-frequency PWM, using an internal transconductance error amplifier (GM = 590 µS typ) and slope compensation to ensure stable regulation across load and line variations. Its control loop integrates internal compensation for fixed-output versions, eliminating external compensation components.
It features hiccup-mode overcurrent protection triggered by either 1.65A peak current limit or 71.14% VOUT undervoltage trip, thermal shutdown at 165°C with 10°C hysteresis, and prebiased soft-start that prevents reverse current flow during power-up into an already-biased output rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and telecom input rails including 24V, 36V, 48V systems without external pre-regulation. |
| Output Voltage | Fixed 3.3V ±1.7% - guaranteed accuracy over full –40°C to +125°C ambient, enabling direct powering of MCU I/O, FPGA banks, and logic interfaces. |
| Max Output Current | 1A continuous - sufficient for point-of-load regulation of microcontrollers, sensors, and communication ICs in space-constrained designs. |
| Switching Frequency | 600kHz (typ) - enables use of small inductors (e.g., ~2.2µH) and reduces output ripple while maintaining EMI manageability. |
| Efficiency Peak | >90% - achieved via low RDS-ON high-side (0.85Ω typ) and low-side (0.35Ω typ) MOSFETs, minimizing conduction losses at full load. |
| Shutdown Current | 0.9µA (typ) - ensures minimal battery drain in always-on or low-power standby modes for portable equipment. |
| Operating Temp Range | –40°C to +125°C ambient - qualified for harsh industrial environments including HVAC, factory automation, and base station power rails. |
Pinout & Package
MAX17502GATB+T is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) connected to GND for thermal enhancement. Pinout is validated per Maxim's official datasheet Rev 5 (19-6245).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power Ground | Low-impedance return path for high-current LX switching node; must be tied externally to power ground plane and connected to GND at VCC bypass cap location. |
| VIN (Pin 2) | Main Input Supply | Accepts 4.5V–60V unregulated input; requires ≥2.2µF ceramic input capacitance close to pin for stability and ripple suppression. |
| EN/UVLO (Pin 3) | Enable / Input UVLO Control | Resistor-divider programmable turn-on threshold (1.218V typ rising); pull high to VIN for always-on operation or configure for brown-out immunity. |
| VCC (Pin 4) | Internal 5V LDO Output | Supplies internal circuitry and low-side gate driver; must be bypassed with 1µF ceramic capacitor to GND; shuts down if VCC falls below 3.7V. |
| FB/VO (Pin 5) | Feedback Input | Connected directly to output for fixed 3.3V version; monitors regulated output and closes control loop with ±1.7% accuracy over temperature. |
| LX (Pin 6) | Switching Node | Connects to inductor switch node; carries high di/dt current; high-impedance during shutdown; requires short, low-inductance PCB trace. |
| GND (Pin 7) | Analog Ground | Reference for FB, SS, COMP, RESET; must be star-connected to PGND at single point near VCC bypass cap to minimize noise coupling. |
| RESET (Pin 8) | Open-Drain Power-Good | Asserts low when VOUT drops below 92.5% of nominal; releases high 1024 clock cycles after VOUT rises above 95.5%; requires external pullup resistor. |
| N.C./COMP (Pin 9) | No Connect (Fixed Output) | Not internally connected for MAX17502G - must remain unconnected; differs from adjustable versions where it serves as compensation node. |
| SS (Pin 10) | Soft-Start Timing | Capacitor-to-GND sets soft-start duration (tSS ≈ 5.55 µs × CSS); reduces input inrush current and prevents output overshoot during startup. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | Eliminates need for external Schottky diode, reducing BOM count, board area, and conduction losses - enables >90% efficiency at 1A. |
| Internal Compensation (Fixed Output) | Removes requirement for external RC compensation network on FB/VO loop - simplifies design, improves layout robustness, and accelerates time-to-market. |
| All-Ceramic Capacitor Support | Enables fully ceramic input (≥2.2µF) and output (≥22µF for 3.3V) capacitor solutions - eliminates electrolytics, improving reliability and lifetime in industrial applications. |
| Programmable EN/UVLO Threshold | Allows precise system-level brown-out detection (e.g., 12V or 24V turn-on) using two resistors - avoids premature startup or uncontrolled shutdown during input transients. |
| Prebiased Soft-Start | Prevents reverse current flow when powered into an already-biased output rail - critical for hot-swap, redundant supply, and battery backup systems. |
Applications
| Industrial Process Control | Telecom Power Management |
|---|---|
Use Scenario: Regulating 3.3V for PLC I/O modules, sensor signal conditioning, and fieldbus interface ICs in factory automation cabinets. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 24V DC bus to clean, accurate 3.3V for digital logic and analog front-ends. Use Value: ±1.7% output accuracy over –40°C to +125°C ensures consistent ADC reference and MCU timing across ambient extremes. | Use Scenario: Generating 3.3V bias for VoIP phone PHYs, Ethernet MACs, and PoE-powered edge devices in telecom infrastructure. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter replacing discrete solutions in space-limited telecom modules. Use Value: 600kHz switching enables small 2.2µH inductors and 22µF ceramic output caps - meets IPC-7351B footprint constraints while passing conducted EMI limits. |
| Battery-Powered Equipment | HVAC & Building Control |
Use Scenario: Powering microcontroller subsystems and wireless transceivers (e.g., BLE, Zigbee) in portable test instruments or handheld meters. IC Role / Device Role / Timing Role: Main DC-DC regulator stepping down 9–36V Li-ion stack or primary battery to stable 3.3V under variable load and temperature. Use Value: 0.9µA shutdown current extends battery life in sleep mode; prebiased start avoids output collapse during wake-up from deep sleep. | Use Scenario: Supplying 3.3V to HVAC controller MCUs, display drivers, and environmental sensors in wall-mounted thermostats and zone controllers. IC Role / Device Role / Timing Role: Robust, thermally efficient regulator operating from 24V AC/DC or 48V PoE-derived rails in enclosed, high-temp enclosures. Use Value: TDFN-10 package with EP provides superior thermal performance (θJA = 67.3°C/W) - sustains 1A output at +85°C ambient without derating. |
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 | Automotive-grade AEC-Q100, 65V max input, 1A, 600kHz, but requires external compensation and Schottky diode for asynchronous mode; no integrated low-side FET. | Targeted for automotive infotainment and ADAS; lacks RESET and EN/UVLO programmability of MAX17502GATB+T. | Choose LM5164QDDARQ1 only if AEC-Q100 qualification is mandatory and external component count is acceptable. |
| TPS54260DGQR | 60V input, 2.5A, 100–2500kHz adjustable frequency, but larger SOIC-8 package, higher quiescent current (110µA), and no integrated low-side FET. | Designed for higher-current industrial supplies; lacks prebiased start, RESET, and ±1.7% accuracy over full temp range. | Choose TPS54260DGQR only if >1A output or adjustable frequency is required and board space permits SOIC-8 footprint. |
Compared with LM5164QDDARQ1 and TPS54260DGQR, the MAX17502GATB+T offers superior integration (dual MOSFETs, internal compensation, RESET), tighter output accuracy, lower shutdown current, and smaller TDFN-10 footprint - making it optimal for space- and efficiency-critical industrial and telecom point-of-load designs.
Availability
MAX17502GATB+T is available at Aetrix Electronics and suitable for industrial process control, telecom power management, and battery-powered equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX17502GATB+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 MAX17502 product line delivers ultra-small, high-efficiency synchronous buck regulators targeting space-constrained industrial and telecom point-of-load applications where wide input range, high accuracy, and robust protection are essential.
FAQ
What is the output voltage tolerance of the MAX17502GATB+T over temperature?
The MAX17502GATB+T guarantees ±1.7% output voltage accuracy over the full operating temperature range of –40°C to +125°C ambient. This specification is verified across production lots and applies to the fixed 3.3V output version under all load and line conditions within datasheet limits.
Does the MAX17502GATB+T require external compensation components?
No, the MAX17502GATB+T does not require external compensation components. As a fixed-output variant (3.3V), it incorporates internal compensation circuitry - confirmed in the "Benefits and Features" section and block diagram of the official datasheet. External RC networks are only needed for adjustable-output versions (MAX17502H).
What is the function of the N.C./COMP pin on the MAX17502GATB+T?
The N.C./COMP pin (Pin 9) on the MAX17502GATB+T is a no-connect pin - it is not internally connected and must remain unconnected on the PCB. This differs from the MAX17502H variant, where the same pin serves as the compensation node for external RC network connection.
Can the MAX17502GATB+T safely start into a prebiased output?
Yes, the MAX17502GATB+T supports prebiased output startup. Its control logic disables both high-side and low-side switches until the first PWM pulse is commanded, preventing reverse current flow from the precharged output into the IC - a feature explicitly documented in the "Prebiased Output" section of the datasheet.
What thermal performance can be expected from the MAX17502GATB+T in a standard 4-layer PCB layout?
In a standard 4-layer PCB layout per JEDEC JESD51-7, the MAX17502GATB+T (TDFN-10) exhibits θJA = 67.3°C/W. At 1A load and 24V input, typical power dissipation is ~350mW, resulting in ~23.6°C junction-to-ambient rise - well within the +125°C ambient rating and thermal shutdown threshold of +165°C.
MAX17502GATB+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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 55.2V
- 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)
MAX17502GATB+T FAQ
1.How can I place an order for MAX17502GATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17502GATB+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 MAX17502GATB+T reliable?
The price and inventory of MAX17502GATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17502GATB+T is usually 5 days.
3.What payment methods are accepted for MAX17502GATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17502GATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17502GATB+T?
MAX17502GATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17502GATB+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 MAX17502GATB+T?
For technical support, including MAX17502GATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17502GATB+T requirements.
6.How does Aetrix verify that MAX17502GATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17502GATB+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 MAX17502GATB+T meets industry standards.
7.What is the process for return or replacement of MAX17502GATB+T?
All MAX17502GATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17502GATB+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 MAX17502GATB+T part is unused and in its original packaging.
Return procedure for MAX17502GATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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