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Analog Devices Inc./Maxim Integrated MAX17502HAUD+T
- Part No.:
- MAX17502HAUD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX17502HAUD+T.pdf
- Description:
- IC REG BUCK ADJ 1A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,424
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Product details
Overview
MAX17502HAUD+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 300kHz switching frequency, ±1.7% output voltage accuracy over –40°C to +125°C, and adjustable output voltage range of 0.9V to 96.5% VIN. It delivers regulated power in industrial process control and telecom point-of-load applications.
For engineers reviewing the MAX17502HAUD+T datasheet, MAX17502HAUD+T pinout, MAX17502HAUD+T application, or MAX17502HAUD+T equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and protection behavior, and real-world design meaning for layout, efficiency, and fault resilience.
Technical Context
The MAX17502HAUD+T implements peak-current-mode control with internal transconductance error amplifier (GM = 590 µS typ), slope compensation, and fixed 300kHz switching frequency - ensuring stable regulation across line, load, and temperature. Its dual-MOSFET architecture integrates a 0.85Ω high-side pMOS and 0.35Ω low-side nMOS (at +25°C), enabling >90% peak efficiency without external Schottky diodes.
It features hiccup-mode overcurrent protection triggered by either runaway current limit (1.7A typ) or VOUT falling below 71.14% of nominal, plus thermal shutdown at +165°C with 10°C hysteresis. The open-drain RESET pin asserts low when FB drops below 92.5% VFB_REG and releases after 1024 cycles once FB rises above 95.5% VFB_REG.
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 Current | Up to 1A continuous - sufficient for FPGA I/O banks, microcontroller cores, and sensor signal chains in compact designs. |
| Switching Frequency | 300kHz (typ) - balances EMI control, inductor size, and efficiency; enables use of <10µH shielded power inductors. |
| Output Voltage Accuracy | ±1.7% over –40°C to +125°C - ensures reliable operation in uncontrolled ambient environments without recalibration. |
| Peak Efficiency | >90% - reduces thermal load in sealed enclosures and extends battery runtime in portable equipment. |
| Shutdown Current | 0.9µA (typ) - enables ultra-low-power system sleep modes without compromising wake-up responsiveness. |
| Thermal Shutdown Threshold | +165°C junction - protects against sustained overload while allowing full rated operation up to +125°C ambient. |
Pinout & Package
MAX17502HAUD+T is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) connected to GND for enhanced thermal dissipation. Pinout matches the MAX17502H variant per Maxim's official datasheet (Rev 5, p.9).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power Ground | Low-impedance return path for high di/dt LX current; must be tied externally to power ground plane and connected to GND at VCC bypass capacitor. |
| VIN (Pin 2) | Main Input Supply | Accepts 4.5V–60V; requires ≥2.2µF ceramic input capacitance close to pin to suppress high-frequency ripple and EMI. |
| EN/UVLO (Pin 3) | Enable / Adjustable Undervoltage Lockout | Resistor-divider programmable turn-on threshold (1.218V typ rising); pull to VIN for always-on operation. |
| VCC (Pin 4) | Internal 5V LDO Output | Bypass with 1µF ceramic to GND; powers internal logic and low-side gate driver; shuts down if VCC falls below 3.7V. |
| FB/VO (Pin 5) | Feedback Input | Connects to center of resistor divider for adjustable output (0.9V–96.5% VIN); regulates to 0.9V reference with ±1.7% accuracy. |
| SS (Pin 6) | Soft-Start Timing | Capacitor-to-GND sets soft-start time (tSS ≈ 5.55×10⁻⁶/CSS); prevents input inrush during power-up or prebiased start. |
| N.C./COMP (Pin 7) | No Connect / Compensation | No connect for MAX17502H; unused in fixed-output variants - leave floating per datasheet guidance. |
| RESET (Pin 8) | Open-Drain Power-Good Monitor | Sinks 2mA when low; asserts after VOUT drops below 92.5% target; releases 1024 cycles after VOUT exceeds 95.5% target. |
| GND (Pin 9) | Analog Ground | Reference for FB, SS, COMP, RESET; tie to PGND at single-point star ground near VCC capacitor to minimize noise coupling. |
| LX (Pin 10) | Switching Node | Connects directly to inductor switch node; high-impedance in shutdown; requires tight layout with minimal trace length to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Dual MOSFETs | 0.85Ω pMOS high-side + 0.35Ω nMOS low-side (25°C) - eliminates external Schottky diode and reduces BOM count and board area. |
| All-Ceramic Capacitor Support | Stable operation with X7R/X5R MLCCs only - enables ultra-compact, low-profile layouts without electrolytic bulk capacitors. |
| Programmable EN/UVLO Threshold | Resistor-divider sets precise turn-on voltage (e.g., 12V, 24V, 36V) - avoids brown-out during cold cranking or weak supply conditions. |
| Hiccup-Mode Overcurrent Protection | Auto-retry after 32,768 clock cycles (≈109ms at 300kHz) - limits average power dissipation during sustained short-circuit faults. |
| Prebiased Power-Up Capability | Both switches remain off until first PWM pulse - prevents reverse current flow into precharged outputs, protecting downstream circuitry. |
Applications
| Industrial Process Control | Telecom Point-of-Load |
|---|---|
|
Use Scenario: Powering analog front-ends and isolated ADCs in PLC I/O modules operating from 24V or 48V field buses. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, accurate 3.3V or 5V to precision signal chains with minimal thermal drift. Use Value: ±1.7% output accuracy over –40°C to +125°C ensures consistent ADC reference stability without calibration across environmental extremes. |
Use Scenario: Generating 3.3V or 5V from 48V telecom rectified bus for Ethernet PHYs, SFP+ controllers, and baseband processors. IC Role / Device Role / Timing Role: High-voltage, high-efficiency step-down stage replacing discrete buck controllers and external MOSFETs. Use Value: 60V absolute max rating and hiccup-mode protection enable robust operation during 48V bus transients and hot-swap events. |
| Home Theatre Power Management | Battery-Powered Test Equipment |
|
Use Scenario: Regulating 5V for HDMI interface ICs and audio DACs in AV receivers powered from universal AC adapters (12–24V DC output). IC Role / Device Role / Timing Role: Compact, low-noise DC-DC converter minimizing conducted EMI on sensitive audio/video signal paths. Use Value: Fixed 300kHz switching frequency simplifies EMI filter design; all-ceramic support eliminates electrolytic aging and leakage issues. |
Use Scenario: Supplying 3.3V to microcontrollers and sensors in handheld multimeters or portable oscilloscopes using Li-ion or 9V alkaline packs. IC Role / Device Role / Timing Role: Wide-input buck converter supporting variable battery voltage (6–30V) while maintaining regulated output during discharge. Use Value: 0.9µA shutdown current extends shelf life and standby time; prebiased start prevents damage when connecting to partially charged batteries. |
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 | 4.5V–65V input, 1A, 600kHz, no integrated high-side FET - requires external pMOS; lower quiescent current (15µA) but no hiccup mode. | Automotive AEC-Q100 qualified; lacks RESET and prebias support - less suitable for industrial reset sequencing or battery-backed systems. | Select LM5164QDRCRQ1 only when AEC-Q100 compliance is mandatory and external FET layout overhead is acceptable. |
| MPQ4420AGL-Z | 4.5V–60V input, 2A, 500kHz, integrated FETs, ±2% accuracy, no programmable EN/UVLO - fixed 1.21V threshold. | Higher current capability but wider output tolerance; no soft-start capacitor option - limits inrush control in high-capacitance loads. | Choose MPQ4420AGL-Z when >1A output is required and ±2% regulation suffices; avoid where precise UVLO or soft-start timing is critical. |
Compared with LM5164QDRCRQ1 and MPQ4420AGL-Z, the MAX17502HAUD+T uniquely combines 300kHz fixed-frequency operation, hiccup-mode protection, programmable EN/UVLO, and prebiased startup - making it optimal for thermally constrained industrial and telecom designs requiring deterministic fault recovery and supply sequencing.
Availability
MAX17502HAUD+T is available at Aetrix Electronics and suitable for industrial process control, telecom point-of-load, and battery-powered test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX17502HAUD+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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets with emphasis on integration, reliability, and thermal robustness.
The MAX17502 product line delivers ultra-small, high-efficiency synchronous buck regulators targeting space-constrained, high-voltage industrial and telecom applications where integrated FETs, wide VIN, and comprehensive protection are essential.
FAQ
What is the maximum input voltage rating for the MAX17502HAUD+T?
The MAX17502HAUD+T has an absolute maximum input voltage rating of +70V, with guaranteed operational performance from 4.5V to 60V. Exceeding 60V may cause premature device failure even if within the absolute maximum limit, as internal protection circuits are optimized for the 60V operational range. Always maintain VIN ≤ 60V in normal operation.
Does the MAX17502HAUD+T support prebiased output startup?
Yes, the MAX17502HAUD+T supports prebiased output startup. When enabled into a precharged output, both high-side and low-side MOSFETs remain off until the first PWM command, preventing reverse current flow. This behavior is confirmed in the datasheet's "Prebiased Output" section (p.12) and applies specifically to the MAX17502H variant.
What is the function of the N.C./COMP pin on the MAX17502HAUD+T?
The N.C./COMP pin (Pin 7) is a no-connect for the MAX17502HAUD+T, as it belongs to the MAX17502H adjustable-output variant but does not require external compensation. Maxim's datasheet explicitly states this pin should be left unconnected for fixed-output versions - and since MAX17502H uses internal compensation, no RC network is needed.
How does the RESET pin on the MAX17502HAUD+T behave during thermal shutdown?
The RESET pin on the MAX17502HAUD+T goes low during thermal shutdown, as stated in the "RESET Output" section (p.11): "RESET also goes low during thermal shutdown." This provides a unified fault indicator for both output undervoltage and junction overtemperature events, simplifying system-level monitoring.
Can the MAX17502HAUD+T operate with only ceramic capacitors?
Yes, the MAX17502HAUD+T is fully compatible with all-ceramic capacitor designs. The datasheet confirms stable operation using X7R/X5R MLCCs for input (≥2.2µF), output (≥10µF for 5V, ≥22µF for 3.3V), and VCC (1µF) - eliminating need for electrolytics and improving long-term reliability in high-temperature environments.
MAX17502HAUD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width) 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):
- 57.9V
- Current - Output:
- 1A
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP-EP
MAX17502HAUD+T FAQ
1.How can I place an order for MAX17502HAUD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17502HAUD+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 MAX17502HAUD+T reliable?
The price and inventory of MAX17502HAUD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17502HAUD+T is usually 5 days.
3.What payment methods are accepted for MAX17502HAUD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17502HAUD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17502HAUD+T?
MAX17502HAUD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17502HAUD+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 MAX17502HAUD+T?
For technical support, including MAX17502HAUD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17502HAUD+T requirements.
6.How does Aetrix verify that MAX17502HAUD+T is sourced from the original manufacturer or authorized distributors?
All MAX17502HAUD+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 MAX17502HAUD+T meets industry standards.
7.What is the process for return or replacement of MAX17502HAUD+T?
All MAX17502HAUD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17502HAUD+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 MAX17502HAUD+T part is unused and in its original packaging.
Return procedure for MAX17502HAUD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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