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Analog Devices Inc./Maxim Integrated MAX17501BATB+T
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- Part No.:
- MAX17501BATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17501BATB+T.pdf
- Description:
- IC REG BUCK 5V 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,820
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Product details
Overview
MAX17501BATB+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 - designed for industrial point-of-load regulation in space-constrained systems.
For engineers reviewing the MAX17501BATB+T datasheet, MAX17501BATB+T pinout, MAX17501BATB+T application, or MAX17501BATB+T equivalent, key selection considerations include its 4.5V–60V wide input range, PFM light-load efficiency mode, resistor-programmable EN/UVLO threshold, open-drain RESET output with 92.5%/95.5% VOUT thresholds, and TDFN-10 (3mm × 2mm) package with exposed pad for thermal management.
Technical Context
The MAX17501BATB+T implements peak-current-mode control with internal transconductance error amplifier (GM = 590µS), slope compensation, and PWM/PMF selectable operation - where the B variant uses PFM for >90% light-load efficiency. It integrates a 5V LDO (VCC) with 40mA drive capability and built-in hiccup-mode overcurrent protection triggered at 780mA runaway current limit.
Its architecture supports prebiased startup, adjustable soft-start via external capacitor on SS pin, and robust fault handling including thermal shutdown at +165°C (10°C hysteresis), output undervoltage monitoring via FB/VO, and open-drain RESET assertion when VOUT falls below 92.5% of nominal - all operating across –40°C to +125°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - enables direct regulation from 12V/24V/48V industrial rails and battery stacks without pre-regulation. |
| Output Voltage | Fixed 5.0V ±1.7% - guaranteed accuracy over full –40°C to +125°C temperature range and line/load conditions. |
| Max Output Current | 500mA continuous - supported by integrated 0.85Ω high-side pMOS and 0.35Ω low-side nMOS at +25°C. |
| Switching Frequency | 600kHz (typ) - allows compact magnetics and ceramic output capacitors; minimum on-time 120ns supports high VIN/VOUT ratios. |
| Efficiency (Peak) | >90% at 5V/500mA - achieved via synchronous rectification, low RDS-ON MOSFETs, and PFM mode reducing no-load current to <140µA. |
| Shutdown Current | 0.9µA (typ) - enables ultra-low power hold-up in battery-backed or always-on industrial systems. |
| RESET Threshold Accuracy | VOUT-OKF = 92.5%, VOUT-OKR = 95.5% - provides precise power-good signaling for microcontroller reset sequencing. |
Pinout & Package
MAX17501BATB+T is housed in a 10-pin TDFN package (3mm × 2mm) with exposed thermal pad (EP) connected to GND, optimized for high-power-density PCB layouts and thermal dissipation (θJA = 67.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for LX switch node; must be tied to power ground plane and connected to GND at VCC bypass capacitor. |
| 2 VIN | Main Input Supply | Accepts 4.5V–60V; includes absolute max rating of +70V for transient robustness. |
| 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; powers internal circuitry and low-side gate driver; shuts down if VCC drops below 3.7V. |
| 5 FB/VO | Feedback Input | Direct connection to 5V output for fixed-version regulation; monitors output for RESET and loop control. |
| 6 SS | Soft-Start Timing | Capacitor-to-GND sets ramp time; prevents input inrush and enables controlled prebiased startup. |
| 7 N.C./COMP | No Connect (Fixed Output) | Not connected for MAX17501B; reserved for external compensation in adjustable variants (G/H). |
| 8 RESET | Open-Drain Power-Good | Asserts low when VOUT < 92.5%; releases after 1024 cycles once VOUT > 95.5%; requires external pullup. |
| 9 GND | Analog Ground | Reference for FB, COMP, SS, RESET; separate from PGND but tied at VCC bypass point. |
| 10 LX | Switching Node | Connects to inductor; high-impedance during shutdown; supports synchronous buck topology with integrated FETs. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated 0.85Ω pMOS high-side and 0.35Ω nMOS low-side switches eliminate external Schottky diode, reduce conduction loss, and enable >90% full-load efficiency. |
| PFM Light-Load Mode | Reduces no-load quiescent current to <140µA at +25°C and maintains >85% efficiency at 1mA load - critical for battery-powered industrial sensors. |
| Robust Fault Protection | Hiccup-mode OCP triggered by single-cycle 780mA runaway current limit; thermal shutdown at +165°C with 10°C hysteresis; continuous short-circuit survival. |
| Precision Power Sequencing | Open-drain RESET with 92.5%/95.5% VOUT thresholds and 1024-cycle delay ensures reliable microcontroller reset timing independent of input transients. |
| Prebiased Startup Support | Prevents reverse current flow into powered outputs; both FETs remain off until first PWM pulse, enabling safe hot-plug and rail-sharing applications. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Regulating 5V supply for PLC I/O modules interfacing with 24V field buses under wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 5V at up to 500mA with ±1.7% accuracy from 12–48V input rails. Use Value: Eliminates need for external FETs or compensation components; TDFN-10 footprint saves >40% board area vs. SOIC alternatives. |
Use Scenario: Powering HVAC controller MCUs and sensor interfaces in environments with 40V surges and –40°C cold starts. IC Role / Device Role / Timing Role: High-voltage buck converter providing regulated 5V with hiccup-mode OCP and thermal shutdown for system reliability. Use Value: 60V absolute max input withstands induced transients; PFM mode extends battery life in wireless thermostat nodes. |
| Base Station & Telecom | Home Theatre Equipment |
Use Scenario: Generating 5V bias for RF front-end ICs and optical transceivers in small-cell base stations with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise, fixed-frequency (600kHz) DC-DC stage with ceramic-capable layout minimizing conducted EMI. Use Value: Meets CISPR-22 Class B conducted EMI with minimal external filtering; RESET signal synchronizes FPGA configuration sequence. |
Use Scenario: Supplying 5V to HDMI interface ICs and audio DSPs in compact AV receivers subject to 12V/24V adapter inputs. IC Role / Device Role / Timing Role: Space-efficient, thermally robust regulator supporting rapid power-up and brownout recovery. Use Value: Exposed pad and θJA = 67.3°C/W allow full 500mA output without heatsink; soft-start prevents audio pop during turn-on. |
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 high-side FET - requires external pMOS. | Automotive-grade only; lacks PFM mode and RESET output; lower current rating limits use in higher-power industrial loads. | Select when automotive qualification is mandatory and 300mA suffices; not drop-in due to external FET requirement and missing RESET. |
| TPS54360DGQR | 3.5V–60V input, 3.5A output, 100kHz–2.5MHz adjustable frequency; larger SOIC-8 package; no integrated low-side FET. | Higher current capability but requires external nMOS and compensation network; no PFM mode or precision RESET thresholds. | Choose for >500mA loads or programmable frequency; not pin-compatible and demands more design effort than MAX17501BATB+T. |
Compared with LM5164QDDARQ1 and TPS54360DGQR, the MAX17501BATB+T delivers optimal balance of integration (dual MOSFETs, RESET, PFM), precision (±1.7% VOUT), and compactness (TDFN-10) for 500mA industrial point-of-load applications - eliminating external components while maintaining thermal headroom and sequencing control.
Availability
MAX17501BATB+T 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 MAX17501BATB+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 - emphasizing integration, reliability, and thermal robustness.
The MAX17501 product line targets high-voltage, space-constrained DC-DC conversion in harsh environments, delivering fully integrated synchronous buck regulators with precision monitoring, fault protection, and simplified layout requirements.
FAQ
What is the output voltage tolerance of the MAX17501BATB+T over temperature?
The MAX17501BATB+T guarantees ±1.7% output voltage accuracy over the full –40°C to +125°C ambient operating temperature range. This specification is validated across process, voltage, and temperature corners and applies to its fixed 5V output configuration, ensuring stable MCU and sensor powering without external trimming.
Does the MAX17501BATB+T support prebiased output startup?
Yes, the MAX17501BATB+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 and enabling safe hot-plug operation in systems with shared or back-driven rails - a confirmed behavior documented in the MAX17501 datasheet Section "Prebiased Output".
What is the function of the N.C./COMP pin on the MAX17501BATB+T?
The N.C./COMP pin (Pin 7) on the MAX17501BATB+T is a no-connect terminal. As a fixed 5V output variant (B version), it does not require external loop compensation - unlike adjustable versions (G/H) which use this pin for RC network connection. Leaving Pin 7 unconnected is mandatory per the MAX17501BATB+T pinout and electrical specifications.
How does the RESET output of the MAX17501BATB+T behave during thermal shutdown?
During thermal shutdown, the RESET output of the MAX17501BATB+T is actively driven low. This behavior is explicitly specified in the datasheet: "RESET also goes low during thermal shutdown." The signal remains low until junction temperature falls below the hysteresis threshold (+155°C), and then resumes normal regulation monitoring once the device re-enables.
Can the MAX17501BATB+T operate with ceramic input and output capacitors only?
Yes, the MAX17501BATB+T is fully compatible with all-ceramic capacitor designs. Its internal compensation and stable peak-current-mode control enable robust operation using only X7R/X5R MLCCs on both input and output - a key feature highlighted in the "Benefits and Features" section and verified in typical application circuits (Figure 7) of the MAX17501 datasheet.
MAX17501BATB+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)
MAX17501BATB+T FAQ
1.How can I place an order for MAX17501BATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17501BATB+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 MAX17501BATB+T reliable?
The price and inventory of MAX17501BATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17501BATB+T is usually 5 days.
3.What payment methods are accepted for MAX17501BATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17501BATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17501BATB+T?
MAX17501BATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17501BATB+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 MAX17501BATB+T?
For technical support, including MAX17501BATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17501BATB+T requirements.
6.How does Aetrix verify that MAX17501BATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17501BATB+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 MAX17501BATB+T meets industry standards.
7.What is the process for return or replacement of MAX17501BATB+T?
All MAX17501BATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17501BATB+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 MAX17501BATB+T part is unused and in its original packaging.
Return procedure for MAX17501BATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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