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Analog Devices Inc./Maxim Integrated MAX17501BATB+
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- Part No.:
- MAX17501BATB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17501BATB+.pdf
- Description:
- IC REG BUCK 5V 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
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Product details
Overview
MAX17501BATB+ 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 - designed for industrial point-of-load regulation in space-constrained systems.
For engineers reviewing the MAX17501BATB+ datasheet, MAX17501BATB+ pinout, MAX17501BATB+ application, or MAX17501BATB+ equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and efficiency behavior at full load, and real-world alternative selection guidance for high-voltage industrial power rails.
Technical Context
The MAX17501BATB+ implements peak-current-mode control with internal slope compensation and a transconductance error amplifier (GM = 590 µS typ). It uses a fixed 5V feedback reference (VFB_REG = 0.9 V) and delivers regulated output via PWM operation with 600kHz nominal switching frequency and 120ns minimum on-time.
It integrates an internal 5V LDO (VCC) capable of sourcing 40mA, features hiccup-mode overcurrent protection triggered by 780mA runaway current limit, and provides open-drain RESET with 92.5% undervoltage and 95.5% overvoltage thresholds referenced to FB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial input rails including 24V, 36V, and 48V systems without external pre-regulation. |
| Output Voltage | Fixed 5.0V ±1.7% - guaranteed accuracy across –40°C to +125°C ambient, eliminating need for external resistor divider. |
| Max Output Current | 500mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in distributed power architectures. |
| Switching Frequency | 600kHz (typ) - enables use of compact 2.2µH–4.7µH inductors and reduces EMI filter size vs. lower-frequency converters. |
| Peak Efficiency | >90% at 24VIN/5VOUT/250mA - achieved via low RDS(ON) (0.85Ω high-side / 0.35Ω low-side) and synchronous rectification. |
| Shutdown Current | 0.9µA (typ) - minimizes battery drain in always-on industrial monitoring nodes during standby. |
| Operating Temp Range | –40°C to +125°C ambient - qualified for harsh environments including HVAC controllers and base station power supplies. |
Pinout & Package
MAX17501BATB+ is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) connected to GND for thermal enhancement. Pin functions are validated per Maxim's official pin description table and block diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for LX switch node; must be tied to large copper pour and joined with GND at VCC bypass capacitor. |
| 2 VIN | Main Input Supply | Accepts 4.5V–60V; requires ≥1µF ceramic input capacitance close to pin for stability and EMI suppression. |
| 3 EN/UVLO | Enable & Input Threshold Control | Resistor-divider programmable turn-on threshold (1.218V rising); pull to VIN for always-on operation. |
| 4 VCC | Internal 5V LDO Output | Bypassed with 1µF ceramic to GND; powers internal logic and low-side gate driver; UVLO trips at 3.7V. |
| 5 FB/VO | Feedback Input | Connected directly to 5V output; internal 0.9V reference sets regulation point - no external resistors needed. |
| 6 SS | Soft-Start Timing | Capacitor-to-GND sets ramp time; prevents input inrush and output overshoot during startup. |
| 7 N.C./COMP | No Connect (Fixed-Output Version) | Not connected - reserved for adjustable versions (G/H); must remain floating on MAX17501BATB+. |
| 8 RESET | Open-Drain Power-Good | Asserts low when VOUT drops below 92.5%; rises after 1024 cycles once VOUT exceeds 95.5% - requires external pullup. |
| 9 GND | Analog Ground | Reference for FB, COMP, SS, RESET; separated from PGND but joined at single-point VCC bypass location. |
| 10 LX | Switch Node | Connects to inductor; high-impedance in shutdown; drives high-side pMOS and low-side nMOS in complementary PWM. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | On-chip 0.85Ω pMOS high-side + 0.35Ω nMOS low-side eliminates external Schottky diode and reduces conduction loss by >30% vs. asynchronous designs. |
| Fixed 5V Output with Internal Feedback | 0.9V internal reference and direct FB-to-VOUT connection removes external resistor network, saving PCB area and BOM cost. |
| Hiccup-Mode Overcurrent Protection | Triggers after single 780mA runaway event and suspends switching for 32,768 cycles - limits power dissipation under short-circuit without thermal runaway. |
| Prebiased Start-Up Support | Both switches remain off until first PWM pulse - prevents reverse current flow into precharged output, enabling safe hot-swap capability. |
| Thermal Shutdown with Hysteresis | Shuts down at 165°C junction temperature and re-enables only after 10°C cooldown - protects against sustained overload in enclosed enclosures. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering 4–20mA loop transmitters and isolated ADCs in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator converting 24V field bus to clean, stable supply for analog front-ends and microcontrollers. Use Value: ±1.7% output accuracy ensures precise sensor excitation and reference stability; 60V max input withstands 48V surge transients per IEC 61000-4-5. |
Use Scenario: Supplying thermostats, damper actuators, and wireless Zigbee/BLE gateways in commercial HVAC systems. IC Role / Device Role / Timing Role: Compact 5V rail generator from 24V AC/DC or 36V PoE-derived input, operating continuously across –40°C to +85°C ambient. Use Value: 0.9µA shutdown current extends battery backup runtime; TDFN package fits tight spaces behind wall-mounted units. |
| Base Station Power Management | Home Theatre AV Equipment |
Use Scenario: Providing auxiliary 5V bias for RF front-end ICs, clock buffers, and FPGA configuration in small-cell 4G/5G base stations. IC Role / Device Role / Timing Role: Secondary regulator downstream of primary 48V–12V conversion, delivering low-noise 5V with fast transient response. Use Value: 600kHz switching enables small 2.2µH inductors and <100mVpp load-step ripple (200mA step); hiccup mode prevents latch-up during antenna fault events. |
Use Scenario: Generating 5V for HDMI CEC, IR receivers, and standby microcontrollers in AV receivers and soundbars. IC Role / Device Role / Timing Role: Always-on auxiliary supply maintaining system wake capability while main rails are off. Use Value: 0.9µA quiescent current meets Energy Star standby requirements; RESET signal coordinates orderly boot sequence with main SoC. |
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, 300mA output, 600kHz, AEC-Q100 qualified; no integrated VCC LDO - requires external bias. | Automotive body electronics only; lacks industrial temp grade and RESET function. | Select when automotive qualification is mandatory and 300mA load suffices; verify external VCC supply design. |
| TPS54360DGQR | 3.5V–60V input, 3.5A output, 100kHz–2.5MHz adjustable freq; larger SOIC-8 package; no hiccup mode - latches off on overcurrent. | Higher-power industrial motor drives; not suitable for space-constrained 500mA designs. | Choose only if >500mA current or programmable frequency is required; board layout must accommodate larger footprint and heat dissipation. |
Compared with LM5164QDDARQ1 and TPS54360DGQR, the MAX17501BATB+ uniquely combines 500mA capability, fixed 5V output with zero-resistor feedback, hiccup-mode fault recovery, and 3mm × 2mm TDFN packaging - making it optimal for thermally constrained, high-reliability industrial 5V point-of-load applications where simplicity and proven robustness are prioritized over programmability or automotive certification.
Availability
MAX17501BATB+ is available at Aetrix Electronics and suitable for industrial process control, HVAC and building control, and base station power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX17501BATB+ 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, communications, and computing markets.
The MAX17501 product line delivers ultra-small, high-efficiency synchronous buck regulators targeting space- and reliability-critical industrial point-of-load applications with wide-input voltage ranges and integrated protection features.
FAQ
What is the output voltage tolerance of the MAX17501BATB+ over temperature?
The MAX17501BATB+ maintains output voltage accuracy within ±1.7% over the full –40°C to +125°C ambient operating range. This specification is guaranteed by design and characterization, not just tested at +25°C, ensuring consistent 5V regulation in demanding industrial environments where thermal drift could otherwise compromise system timing or analog measurement integrity. The MAX17501BATB+ achieves this via a trimmed internal 0.9V feedback reference and precision resistor ladder.
Does the MAX17501BATB+ support prebiased start-up?
Yes, the MAX17501BATB+ supports prebiased start-up: both high-side and low-side MOSFETs remain fully off until the first PWM command is issued, preventing reverse current flow into an already charged output capacitor. This feature is explicitly documented in the "Prebiased Output" section of the datasheet and enables safe integration into hot-swap or redundant power systems where the output may be energized before the IC is enabled. The MAX17501BATB+ ramps output smoothly to 5V once soft-start begins.
What is the purpose of the N.C./COMP pin on the MAX17501BATB+?
The N.C./COMP pin (Pin 7) on the MAX17501BATB+ is a no-connect terminal - it must remain unconnected and floating. This pin is reserved for external loop compensation in adjustable-output variants (MAX17501G/H), but the MAX17501BATB+ is a fixed-5V version with internal compensation. Connecting any component to this pin on the MAX17501BATB+ risks disrupting internal feedback stability or causing undefined behavior, as confirmed in the "Pin Description" and "Detailed Description" sections of the official datasheet.
How does the RESET output of the MAX17501BATB+ behave during thermal shutdown?
During thermal shutdown, the RESET output of the MAX17501BATB+ is actively driven low - identical to its behavior during output undervoltage conditions. This is explicitly stated in the datasheet: "RESET also goes low during thermal shutdown." The signal remains low throughout the thermal cooldown period and only transitions high-impedance again after the junction temperature falls below the hysteresis threshold (155°C) and the output re-stabilizes above 95.5% of 5V for 1024 switching cycles. This ensures downstream logic receives a reliable fault indicator.
Can the MAX17501BATB+ operate with a 3.3V input supply?
No, the MAX17501BATB+ cannot operate with a 3.3V input supply. Its absolute minimum input voltage is 4.5V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Attempting to power the MAX17501BATB+ below 4.5V will prevent proper startup, cause erratic regulation, or result in complete failure to enable - because the internal VCC LDO requires sufficient headroom to generate its 5V rail, and the EN/UVLO threshold (1.218V) is referenced to VIN. The MAX17501BATB+ is designed exclusively for industrial and telecom inputs starting at 4.5V.
MAX17501BATB+ 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)
MAX17501BATB+ FAQ
1.How can I place an order for MAX17501BATB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17501BATB+ 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 MAX17501BATB+ reliable?
The price and inventory of MAX17501BATB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17501BATB+ is usually 5 days.
3.What payment methods are accepted for MAX17501BATB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17501BATB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17501BATB+?
MAX17501BATB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17501BATB+ 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 MAX17501BATB+?
For technical support, including MAX17501BATB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17501BATB+ requirements.
6.How does Aetrix verify that MAX17501BATB+ is sourced from the original manufacturer or authorized distributors?
All MAX17501BATB+ 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 MAX17501BATB+ meets industry standards.
7.What is the process for return or replacement of MAX17501BATB+?
All MAX17501BATB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17501BATB+, 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 MAX17501BATB+ part is unused and in its original packaging.
Return procedure for MAX17501BATB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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