My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX17501FATB+T
.jpg)
- Part No.:
- MAX17501FATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17501FATB+T.pdf
- Description:
- IC REG BUCK 5V 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,084
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX17501FATB+T 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, ±1.7% output voltage accuracy over –40°C to +125°C, and 600kHz switching frequency - deployed in industrial power rails for base station subsystems and HVAC controllers.
For engineers reviewing the MAX17501FATB+T datasheet, MAX17501FATB+T pinout, MAX17501FATB+T application, or MAX17501FATB+T equivalent, key selection criteria include its 4.5V–60V wide input range, PFM light-load efficiency mode, programmable EN/UVLO threshold, open-drain RESET signal timing (95.5% rising / 92.5% falling), and TDFN-10 (3mm × 2mm) thermal performance (θJA = 67.3°C/W).
Technical Context
The MAX17501FATB+T implements peak-current-mode control with internal slope compensation and a transconductance error amplifier (GM = 590µS typ). It uses a 600kHz oscillator and delivers regulated 5V output via fixed internal feedback divider - eliminating external resistor networks.
Its protection architecture includes hiccup-mode overcurrent response triggered by either runaway current limit (780mA typ) or VOUT undervoltage (71.14% of nominal), thermal shutdown at 165°C with 10°C hysteresis, and prebiased soft-start that prevents output sinking during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide-range industrial supplies including 24V, 36V, and 48V DC bus systems without external pre-regulation. |
| Output Voltage | Fixed 5.0V ±1.7% - guaranteed over full –40°C to +125°C ambient, enabling direct powering of microcontrollers and logic interfaces. |
| Max Output Current | 500mA - sufficient for point-of-load regulation of FPGA I/O banks, sensor signal chains, or isolated gate drivers. |
| Switching Frequency | 600kHz (typ) - enables compact magnetics (e.g., ≤2.2µH inductors) and reduces EMI fundamental while maintaining >90% peak efficiency. |
| Shutdown Current | 0.9µA (typ) - allows battery-backed systems to maintain ultra-low quiescent power during standby. |
| EN/UVLO Threshold | 1.218V (rising), 1.135V (falling) - resistor-programmable turn-on point for controlled sequencing in multi-rail power systems. |
| RESET Accuracy | VOUT-OKR = 95.5%, VOUT-OKF = 92.5% - provides precise power-good assertion/deassertion for system reset coordination. |
Pinout & Package
MAX17501FATB+T is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) connected to GND for enhanced thermal dissipation (θJA = 67.3°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for LX node; must be tied to power ground plane and connected to GND at VCC bypass capacitor location. |
| 2 VIN | Main Input Supply | Accepts 4.5V–60V; requires ≥1µF ceramic input capacitance near pin for ripple suppression and stability. |
| 3 EN/UVLO | Enable & Input Undervoltage Lockout | Resistor-divider programmable turn-on threshold; pull high 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 (up to 40mA sink capability). |
| 5 FB/VO | Feedback Input | Internally connected to fixed 5V divider; shorted directly to output for regulation - no external resistors required. |
| 6 SS | Soft-Start Control | Capacitor-to-GND sets ramp time; prevents input inrush and enables prebiased startup without output sinking. |
| 7 N.C./COMP | No Connect (Fixed-Output Version) | Not bonded internally for MAX17501F; must remain unconnected - not used for loop compensation. |
| 8 RESET | Open-Drain Power-Good | Asserts low when VOUT < 92.5%; rises after 1024 cycles once VOUT > 95.5%; requires external pull-up. |
| 9 GND | Analog Ground | Reference for FB, SS, COMP, RESET; separate from PGND but tied together at VCC bypass capacitor. |
| 10 LX | Switching Node | Connects to inductor switch node; high-impedance during shutdown; drives internal high-side pMOS and low-side nMOS. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | On-chip 0.85Ω high-side pMOS and 0.35Ω low-side nMOS (25°C) eliminate external Schottky diode and reduce conduction losses at full load. |
| PFM Light-Load Efficiency | Skips pulses below ~62.5mA load, reducing no-load switching current to <140µA (typ) and extending battery life in intermittent-duty applications. |
| Robust Overcurrent Protection | Hiccup-mode response triggered by either 780mA runaway current limit or VOUT collapse to 71.14%, limiting fault power dissipation to <1.2mW average during sustained short. |
| Prebiased Soft-Start | Disables both FETs at startup if output is precharged; prevents reverse current flow and ensures monotonic VOUT ramp from any initial voltage ≥0V. |
| Industrial Temperature Rating | Specified for –40°C to +125°C ambient (junction up to +150°C), validated across automotive-grade PCB layouts and thermal cycling profiles. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Regulating 5V rail for PLC I/O modules interfacing with 24V field sensors and actuators in factory automation cabinets. IC Role / Device Role / Timing Role: Primary buck converter delivering stable 5V at up to 500mA with hiccup-mode fault containment during wiring faults or sensor shorts. Use Value: Wide 4.5V–60V input accommodates brownout and surge conditions on 24V DC bus; RESET signal synchronizes firmware watchdog reset on power recovery. | Use Scenario: Powering wireless thermostat controllers and damper actuator drivers operating from 36V or 48V building management system (BMS) backplanes. IC Role / Device Role / Timing Role: Point-of-load regulator with programmable EN/UVLO for sequenced startup and PFM mode for extended battery backup runtime. Use Value: 0.9µA shutdown current extends lithium primary cell life; 600kHz switching enables use of miniature 1206-size inductors in space-constrained wall-mount enclosures. |
| Base Station Subsystems | Battery-Powered Test Equipment |
Use Scenario: Generating clean 5V supply for RF front-end biasing and digital control logic in remote radio units (RRUs) powered from 48V telecom rectifiers. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with low EMI profile (meets CISPR-22 Class B conducted limits) and thermal shutdown for unventilated outdoor enclosures. Use Value: Peak efficiency >90% at 500mA reduces heat buildup; exposed-pad TDFN package achieves 18.2°C/W θJC for direct heatsink coupling. | Use Scenario: Providing regulated 5V for portable oscilloscope analog front-ends and ADC reference circuits powered from 2-cell Li-ion (6V–8.4V) packs. IC Role / Device Role / Timing Role: Input-wide buck converter supporting full battery voltage range without intermediate stages; soft-start prevents inrush into large input capacitance. Use Value: Adjustable EN/UVLO allows turn-on only above 6.2V, preserving battery capacity; ±1.7% output accuracy maintains ADC reference integrity across temperature. |
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, 500mA, 600kHz, AEC-Q100 qualified; requires external compensation and feedback resistors. | Automotive-qualified; lacks integrated 5V fixed divider and PFM mode; higher BOM count. | Choose for automotive under-hood applications requiring AEC-Q100; avoid if fixed 5V and minimal external components are mandatory. |
| TPS54202DRCT | 4.5V–28V input, 2A, 500kHz, integrated compensation; fixed 5V option available (TPS54202H); no PFM mode. | Lower input voltage ceiling; higher current rating; no hiccup-mode or prebiased start support. | Choose for cost-sensitive 24V systems needing >500mA; avoid for 36V+/48V inputs or where hiccup-mode fault containment is critical. |
Compared with LM5164QDDARQ1 and TPS54202DRCT, the MAX17501FATB+T uniquely combines 60V input tolerance, fixed 5V output with zero-resistor feedback, PFM efficiency optimization, and hiccup-mode protection - making it optimal for industrial 48V-powered edge nodes where layout simplicity and fault resilience are prioritized over automotive qualification or higher current.
Availability
MAX17501FATB+T is available at Aetrix Electronics and suitable for industrial process control, HVAC and building control, and base station subsystems requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for MAX17501FATB+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, communications, and computing applications with emphasis on integration, reliability, and thermal robustness.
The MAX17501 product line delivers ultra-small, high-voltage synchronous buck regulators targeting space-constrained industrial power rails where wide input range, fixed-output simplicity, and hiccup-mode fault containment are essential design requirements.
FAQ
What is the output voltage tolerance of the MAX17501FATB+T over temperature?
The MAX17501FATB+T guarantees ±1.7% output voltage accuracy over the full –40°C to +125°C ambient temperature range. This specification is verified across production lots and includes initial tolerance, thermal drift, and line/load regulation effects - ensuring reliable 5.0V operation for microcontroller I/O and analog reference circuits without external trimming.
Does the MAX17501FATB+T support prebiased startup?
Yes, the MAX17501FATB+T supports prebiased startup: both high-side and low-side MOSFETs remain off until the PWM comparator commands the first pulse, preventing reverse current flow into a precharged output. This behavior is confirmed in the device's Detailed Description section and validated in typical operating waveforms (MAX17501 toc26–toc29).
What is the function of the N.C./COMP pin on the MAX17501FATB+T?
The N.C./COMP pin (Pin 7) on the MAX17501FATB+T is a no-connect terminal - it is not bonded internally and must remain unconnected. Unlike adjustable-output variants (e.g., MAX17501G/H), the MAX17501F uses internal compensation and fixed feedback, so external loop compensation is unnecessary and prohibited.
How does the RESET pin of the MAX17501FATB+T behave during thermal shutdown?
During thermal shutdown, the RESET pin of the MAX17501FATB+T is actively driven low. This behavior is explicitly stated in the RESET section of the datasheet: "RESET also goes low during thermal shutdown." The pin remains low until junction temperature falls below the hysteresis threshold (155°C) and regulation resumes, then asserts high after 1024 clock cycles once VFB exceeds 95.5% of nominal.
Can the MAX17501FATB+T operate with an input voltage below 4.5V?
No, the MAX17501FATB+T has a minimum operating input voltage of 4.5V as specified in Absolute Maximum Ratings and Electrical Characteristics. Operation below this voltage is not functional - the internal VCC LDO cannot regulate, EN/UVLO will not assert, and the device remains in shutdown. No characterization data exists for sub-4.5V operation.
MAX17501FATB+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:
- 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+T FAQ
1.How can I place an order for MAX17501FATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17501FATB+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 MAX17501FATB+T reliable?
The price and inventory of MAX17501FATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17501FATB+T is usually 5 days.
3.What payment methods are accepted for MAX17501FATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17501FATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17501FATB+T?
MAX17501FATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17501FATB+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 MAX17501FATB+T?
For technical support, including MAX17501FATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17501FATB+T requirements.
6.How does Aetrix verify that MAX17501FATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17501FATB+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 MAX17501FATB+T meets industry standards.
7.What is the process for return or replacement of MAX17501FATB+T?
All MAX17501FATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17501FATB+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 MAX17501FATB+T part is unused and in its original packaging.
Return procedure for MAX17501FATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17501FATB+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
