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Analog Devices Inc./Maxim Integrated MAX17501FATB+
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- Part No.:
- MAX17501FATB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17501FATB+.pdf
- Description:
- IC REG BUCK 5V 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,812
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Product details
Overview
MAX17501FATB+ from Maxim Integrated is a 60V input, 500mA synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, fixed 5V output (±1.6% accuracy over –40°C to +125°C), and 600kHz switching frequency. It operates across 4.5V–60V input, delivers peak efficiency >90%, and features PFM mode for light-load efficiency in industrial power rails.
For engineers reviewing the MAX17501FATB+ datasheet, MAX17501FATB+ pinout, MAX17501FATB+ application, or MAX17501FATB+ equivalent, key selection criteria include its TDFN-10 (3mm × 2mm) package, EN/UVLO threshold programmability, open-drain RESET with 92.5%/95.5% VOUT thresholds, soft-start control via external capacitor, and hiccup-mode overcurrent protection.
Technical Context
The MAX17501FATB+ employs peak-current-mode control with internal slope compensation and a transconductance error amplifier (GM = 590µS). Its PWM comparator regulates duty cycle using sensed high-side current and internal reference (0.9V FB regulation voltage), enabling stable operation up to 92% maximum duty cycle.
It integrates a 5V LDO (VCC) capable of sourcing 40mA, supports prebiased startup, and implements dual overcurrent protection: cycle-by-cycle peak limit (0.76A typ) and runaway limit (0.78A typ), triggering hiccup mode after one event with 32,768-cycle timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and telecom supply rails without external pre-regulation. |
| Output Voltage | Fixed 5.0V ±1.6% - guaranteed accuracy over full –40°C to +125°C ambient temperature range. |
| Max Output Current | 500mA - sufficient for point-of-load regulation of microcontrollers, sensors, and interface ICs. |
| Switching Frequency | 600kHz (±40kHz) - enables compact magnetics and low-output-ripple designs with ceramic capacitors. |
| Efficiency (Peak) | >90% at 24VIN/5VOUT/500mA - achieved via low RDS(ON) (0.85Ω HS / 0.35Ω LS) and synchronous rectification. |
| Shutdown Current | 0.9µA (typ) - minimizes battery drain in always-on systems with infrequent wake-up cycles. |
| RESET Threshold Accuracy | VOUT-OKF = 92.5% ±2%, VOUT-OKR = 95.5% ±2% - ensures reliable power-good signaling for system sequencing. |
Pinout & Package
MAX17501FATB+ is housed in a 10-pin, 3mm × 2mm TDFN package with exposed thermal pad (EP) connected to GND. The compact footprint supports high-density PCB layouts and efficient thermal dissipation via the EP-to-GND copper plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | Low-impedance return path for high-current LX switching node; must be tied to power ground plane and GND at VCC bypass cap. |
| 2 VIN | Main Input Supply | Accepts 4.5V–60V; withstands 70V absolute max; requires ≥1µF ceramic input capacitance. |
| 3 EN/UVLO | Enable & Input UVLO Control | Resistor-divider programmable turn-on threshold (1.218V rising); pulls up to VIN for always-on operation. |
| 4 VCC | Internal 5V LDO Output | Bypassed with 1µF ceramic to GND; powers internal circuitry and low-side gate driver; shuts down if VCC < 3.7V. |
| 5 FB/VO | Feedback Input | Direct connection to 5V output; senses regulated voltage against 0.9V internal reference for ±1.6% accuracy. |
| 6 SS | Soft-Start Timing | Capacitor-to-GND sets ramp time; reduces input inrush and prevents output overshoot during startup. |
| 7 N.C./COMP | No Connect (Fixed-Output Version) | Not connected internally on MAX17501F; must remain unconnected - not used for loop compensation. |
| 8 RESET | Open-Drain Power-Good | Asserts low when VOUT drops below 92.5%; releases high after 1024 cycles once VOUT exceeds 95.5%. |
| 9 GND | Analog Ground | Reference for FB, SS, COMP, RESET; separated from PGND but tied together at VCC bypass capacitor. |
| 10 LX | Switching Node | Connects to inductor switch node; high-impedance during shutdown; handles ±1.6A RMS current. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | On-chip 0.85Ω pMOS high-side and 0.35Ω nMOS low-side switches eliminate external Schottky diode and reduce BOM count. |
| PFM Light-Load Mode | Skips pulses below ~62.5mA load, reducing no-load switching current to <140µA and improving efficiency at standby. |
| Robust Fault Protection | Hiccup-mode OCP triggered by single-cycle runaway current limit (0.78A) or sustained VOUT undervoltage (71.14% of nominal). |
| Prebiased Startup Support | Both FETs remain off until first PWM pulse, preventing reverse current flow into precharged output rails. |
| Thermal Shutdown with Hysteresis | Shuts down at +165°C junction temperature; restarts automatically after 10°C cooldown, avoiding latch-up failures. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
|
Use Scenario: Powering PLC I/O modules, analog sensor signal chains, and isolated RS-485 transceivers in factory-floor environments with 24V/48V DC distribution buses. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator delivering clean, stable rail with hiccup-mode fault recovery under transient overloads. Use Value: 60V input tolerance accommodates long cable drops and surge events; ±1.6% output accuracy ensures ADC reference stability and DAC linearity. |
Use Scenario: Supplying HVAC controllers, thermostats, and damper actuators operating from 24V AC/DC building power with brownout risk. IC Role / Device Role / Timing Role: Main 5V supply with programmable EN/UVLO to delay startup until input stabilizes above 18V. Use Value: PFM mode extends battery backup runtime; RESET output sequences MCU boot after valid VOUT is established. |
| Base Station & Telecom | Home Theatre & Audio Systems |
|
Use Scenario: Providing bias voltage to RF front-end ICs, clock buffers, and Ethernet PHYs in remote radio units powered from 48V PoE-derived supplies. IC Role / Device Role / Timing Role: Secondary 5V regulator downstream of primary DC-DC; immune to conducted EMI due to 600kHz fixed-frequency operation. Use Value: Low 120ns minimum on-time enables high VIN/VOUT ratios; TDFN package eases thermal management in sealed enclosures. |
Use Scenario: Powering HDMI port logic, audio DSPs, and IR receivers in AV receivers and soundbars fed from 12V wall adapters. IC Role / Device Role / Timing Role: Compact, low-noise 5V source with soft-start to prevent pop/click during power-up. Use Value: All-ceramic design eliminates electrolytic aging; 90%+ efficiency reduces heat near sensitive analog audio stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5V–65V input, 500mA, adjustable output only; requires external feedback resistors and compensation network. | Lacks fixed 5V option and integrated RESET; suited for designs needing flexible VOUT tuning. | Choose LM5164QDDARQ1 when output adjustability and AEC-Q100 qualification are required; MAX17501FATB+ saves layout space and design time for fixed 5V use. |
| TPS54360DGQR | 3.5V–60V input, 3.5A output, adjustable only; larger SOIC-8 package; no integrated RESET or PFM mode. | Higher current capability but significantly larger footprint and higher quiescent current (146µA vs. 0.9µA). | Choose TPS54360DGQR for higher-current loads where board area is less constrained; MAX17501FATB+ offers superior integration and ultra-low IQ for low-power systems. |
Compared with LM5164QDDARQ1 and TPS54360DGQR, the MAX17501FATB+ provides a fully integrated, fixed-5V solution in a 3mm × 2mm TDFN package with built-in RESET, PFM efficiency optimization, and sub-1µA shutdown current - ideal for space- and power-constrained industrial and consumer point-of-load applications.
Availability
MAX17501FATB+ is available at Aetrix Electronics and suitable for industrial process control, HVAC systems, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature extremes.
Supply support for MAX17501FATB+ 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 MAX17501 family targets high-voltage, low-to-mid current DC-DC conversion in space-constrained industrial equipment, emphasizing integration, reliability across –40°C to +125°C, and simplified layout with all-ceramic support.
FAQ
What is the output voltage tolerance of the MAX17501FATB+ over temperature?
The MAX17501FATB+ guarantees ±1.6% output voltage accuracy over the full –40°C to +125°C ambient operating temperature range. This is confirmed by electrical characterization data showing 4.922V (min) to 5.08V (max) at 25°C, with drift bounded within specification across temperature sweeps in typical operating characteristics plots (MAX17501 toc14).
Does the MAX17501FATB+ support prebiased output startup?
Yes, the MAX17501FATB+ supports prebiased output startup. During startup into a precharged rail, both high-side and low-side MOSFETs remain off until the first PWM command, preventing reverse current flow. This behavior is explicitly documented in the Detailed Description section and verified in oscilloscope waveforms (MAX17501 toc26–toc29).
What is the function of the N.C./COMP pin on the MAX17501FATB+?
The N.C./COMP pin (Pin 7) on the MAX17501FATB+ is a no-connect terminal. As a fixed 5V output variant, it does not require external loop compensation; the device uses internal compensation. This pin must remain unconnected - connecting any component risks malfunction or damage, per Pin Description guidance on page 11 of the datasheet.
How does the RESET output of the MAX17501FATB+ behave during thermal shutdown?
The RESET output of the MAX17501FATB+ goes low during thermal shutdown, in addition to dropping below 92.5% of nominal VOUT. This provides a unified fault indicator for both output regulation failure and junction overheating. RESET remains low until thermal recovery completes and VOUT re-stabilizes above 95.5%, then asserts high after 1024 clock cycles.
Can the MAX17501FATB+ operate with only ceramic capacitors on input and output?
Yes, the MAX17501FATB+ is designed for all-ceramic capacitor operation. The datasheet explicitly lists "All-Ceramic Capacitors, Ultra-Compact Layout" as a key benefit, and application circuits (Figures 6 and 7) specify only X7R/X5R ceramic types - no electrolytics required. Minimum 1µF input and recommended 10µF–22µF output ceramics ensure stability and low ripple.
MAX17501FATB+ 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:
- 500mA
- 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)
MAX17501FATB+ FAQ
1.How can I place an order for MAX17501FATB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17501FATB+ 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 MAX17501FATB+ reliable?
The price and inventory of MAX17501FATB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17501FATB+ is usually 5 days.
3.What payment methods are accepted for MAX17501FATB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17501FATB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17501FATB+?
MAX17501FATB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17501FATB+ 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 MAX17501FATB+?
For technical support, including MAX17501FATB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17501FATB+ requirements.
6.How does Aetrix verify that MAX17501FATB+ is sourced from the original manufacturer or authorized distributors?
All MAX17501FATB+ 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 MAX17501FATB+ meets industry standards.
7.What is the process for return or replacement of MAX17501FATB+?
All MAX17501FATB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17501FATB+, 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 MAX17501FATB+ part is unused and in its original packaging.
Return procedure for MAX17501FATB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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