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Analog Devices Inc./Maxim Integrated MAX17501HATB+
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- Part No.:
- MAX17501HATB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17501HATB+.pdf
- Description:
- IC REG BUCK ADJ 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,526
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Product details
Overview
MAX17501HATB+ 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 3.3V output, ±1.7% regulation accuracy over –40°C to +125°C, and 300kHz switching frequency. It delivers high efficiency (>90% peak) in industrial power rails for base station power management.
For engineers reviewing the MAX17501HATB+ datasheet, MAX17501HATB+ pinout, MAX17501HATB+ application, or MAX17501HATB+ equivalent, key selection criteria include its 300kHz forced-PWM operation (reducing EMI in noise-sensitive telecom systems), resistor-programmable EN/UVLO threshold, open-drain RESET with 92.5–95.5% VOUT trip points, and TDFN-10 (3mm × 2mm) package enabling ultra-compact point-of-load designs.
Technical Context
The MAX17501HATB+ employs peak-current-mode control with internal transconductance error amplifier (GM = 590µS typ), slope compensation, and fixed 300kHz oscillator-ensuring stable regulation under wide VIN (4.5V–60V) and load (0–500mA) variations. Its hiccup-mode overcurrent protection triggers after one runaway current-limit event (IRUNAWAY-LIMIT = 0.78A typ) and enforces 32,768-cycle timeout before retry.
It integrates a 5V LDO (VCC) with 40mA drive capability and 3.7V UVLO, supports prebiased startup, and features adjustable soft-start via external capacitor on SS pin. The EN/UVLO pin allows resistor-divider programming of turn-on threshold (VENR = 1.218V typ), while RESET provides delayed power-good signaling (1024 cycles after regulation achieved).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and telecom supply rails including 24V, 36V, 48V systems without external regulators. |
| Output Voltage | Fixed 3.3V ±1.7% - guaranteed accuracy across –40°C to +125°C ambient, eliminating need for external feedback resistors. |
| Switching Frequency | 300kHz (typ) - enables use of small, low-DCR inductors and reduces EMI compared to lower-frequency alternatives. |
| Peak Efficiency | >90% - achieved via integrated 0.85Ω high-side pMOS and 0.35Ω low-side nMOS at +25°C, minimizing conduction losses. |
| Shutdown Current | 0.9µA (typ) - enables ultra-low-power standby in battery-backed or energy-harvesting applications. |
| Thermal Shutdown | 165°C with 10°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
| RESET Delay | 1024 switching cycles (~3.4ms at 300kHz) - provides clean, glitch-free power-good assertion after stable regulation. |
Pinout & Package
MAX17501HATB+ uses a 10-pin TDFN package (3mm × 2mm, 0.5mm pitch) with exposed pad (EP) connected to GND for thermal dissipation. Pin functions are validated per Maxim's official pin description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for LX switch node; must be connected directly to power ground plane and tied to GND at VCC bypass cap. |
| 2 VIN | Main Input Supply | Accepts 4.5V–60V; requires ≥1µF ceramic input capacitance; absolute max rating is +70V. |
| 3 EN/UVLO | Enable / Input Undervoltage Lockout | Resistor-divider programmable turn-on threshold (1.218V typ 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; shuts down if VCC falls below 3.7V. |
| 5 FB/VO | Feedback Input | Connected directly to 3.3V output; internal reference is 0.9V; enables ±1.7% output regulation accuracy. |
| 6 SS | Soft-Start Control | Capacitor-to-GND sets ramp time; prevents input inrush and ensures controlled VOUT rise during power-up. |
| 7 N.C./COMP | No Connect (Fixed-Output Version) | Not connected internally for MAX17501H; left floating per datasheet guidance. |
| 8 RESET | Open-Drain Power-Good Output | Sinks 2mA when low; asserts after 1024 cycles post-regulation; trips low if VOUT drops below 92.5% of nominal. |
| 9 GND | Analog Ground | Reference for FB, COMP, SS, RESET; must be tied to PGND at VCC bypass capacitor location. |
| 10 LX | Switching Node | Connects to inductor high side; high-impedance in shutdown; handles ±1.6A RMS current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side MOSFETs | 0.85Ω pMOS + 0.35Ω nMOS eliminates external switches and Schottky diode, reducing BOM count and layout area. |
| Forced PWM Operation | Fixed 300kHz switching (no PFM skipping) ensures predictable EMI profile and stable loop response in noise-critical telecom systems. |
| Programmable EN/UVLO Threshold | Resistor divider on EN/UVLO pin sets precise input turn-on voltage (e.g., 12V or 24V system sequencing), improving system reliability. |
| Prebiased Startup Support | Prevents reverse current flow into powered outputs during hot-plug or backup-supply scenarios, avoiding bus contention. |
| Hiccup-Mode Overcurrent Protection | Auto-retry after 32,768 cycles limits average power dissipation during sustained short-circuit, protecting both IC and PCB traces. |
| Open-Drain RESET with Delayed Assertion | 1024-cycle delay ensures VOUT settles before signaling "power good", preventing premature microcontroller wake-up or FPGA configuration. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering isolated sensor interfaces and PLC I/O modules in 24V/48V factory automation systems. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering stable rail for ADCs, isolators, and microcontrollers. Use Value: ±1.7% output accuracy over –40°C to +125°C ensures measurement integrity without calibration drift across temperature extremes. |
Use Scenario: Providing regulated 3.3V supply to smart thermostats and HVAC controllers operating from 24V AC/DC adapters. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC converter replacing linear regulators to reduce heat buildup in sealed enclosures. Use Value: 3mm × 2mm TDFN package and 165°C thermal shutdown enable reliable operation in confined, unventilated spaces. |
| Base Station Power Management | Home Theatre Equipment |
Use Scenario: Generating 3.3V bias for RF front-end ICs and clock buffers in LTE/5G remote radio units (RRUs). IC Role / Device Role / Timing Role: Noise-controlled power stage with fixed 300kHz PWM, minimizing interference with sensitive RF signal paths. Use Value: Forced-PWM mode eliminates variable-frequency artifacts, simplifying conducted EMI filtering and meeting stringent telecom standards. |
Use Scenario: Supplying 3.3V logic rail to HDMI switch controllers and audio DSPs in AV receivers and soundbars. IC Role / Device Role / Timing Role: Efficient, low-noise step-down regulator supporting rapid power-state transitions (standby → active). Use Value: 0.9µA shutdown current extends standby battery life in remote-controlled devices; prebiased startup avoids output droop during wake-up. |
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 |
|---|---|---|---|
| MAX17501EATB+ | Same package and pinout; fixed 3.3V output but operates at 600kHz switching frequency and includes PFM mode for higher light-load efficiency. | Better suited for battery-powered equipment where quiescent current and light-load efficiency dominate; less ideal for EMI-sensitive fixed-frequency systems. | Select MAX17501EATB+ when optimizing for >92% efficiency at 1–10mA loads; choose MAX17501HATB+ when deterministic 300kHz EMI behavior is required. |
| LM5164QDDARQ1 | Automotive-grade (AEC-Q100), 65V input, 500mA, 400kHz fixed-frequency; requires external MOSFETs and compensation components. | Designed for automotive infotainment and ADAS power rails; lacks integrated RESET and programmable EN/UVLO. | Choose LM5164QDDARQ1 only for AEC-Q100-compliant designs requiring extended temperature validation; MAX17501HATB+ offers faster time-to-market with full integration. |
Compared with MAX17501EATB+, the MAX17501HATB+ trades light-load PFM efficiency for EMI predictability and simpler layout; versus LM5164QDDARQ1, it delivers plug-and-play operation with no external FETs or loop compensation, reducing design risk and board space by >30%.
Availability
MAX17501HATB+ is available at Aetrix Electronics and suitable for industrial process control, telecom base station power, and home theatre equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX17501HATB+ 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.
The MAX17501 product line delivers ultra-small, high-voltage synchronous buck regulators targeting space-constrained, wide-input industrial and telecom power supplies where integration, thermal robustness, and reliability are critical.
FAQ
What is the switching frequency of the MAX17501HATB+?
The MAX17501HATB+ operates at a fixed 300kHz switching frequency, confirmed in the Electrical Characteristics table (fSW = 280–320kHz typical). This forced-PWM mode eliminates frequency variation at light loads, ensuring consistent EMI behavior and simplifying filter design for telecom and industrial applications where spectral predictability is essential. The MAX17501HATB+ does not support PFM mode.
Does the MAX17501HATB+ support prebiased startup?
Yes, the MAX17501HATB+ supports prebiased startup: when enabled into a precharged output, both high-side and low-side MOSFETs remain off until the first PWM pulse is commanded, preventing reverse current flow. This feature is explicitly documented in the Detailed Description section and ensures safe operation in hot-swap or redundant power architectures where the output may already be biased.
What is the function of the N.C./COMP pin on the MAX17501HATB+?
On the MAX17501HATB+, the N.C./COMP pin (Pin 7) is a no-connect terminal - it is not bonded internally and must be left unconnected. This is specific to fixed-output versions (A/B/E/F/H); only adjustable-output variants (G/H) use this pin for external compensation. Connecting or routing this pin on the MAX17501HATB+ violates the datasheet recommendation and risks undefined behavior.
How does the RESET output of the MAX17501HATB+ behave during thermal shutdown?
During thermal shutdown, the RESET output of the MAX17501HATB+ is actively driven low, as stated in the RESET section: "RESET also goes low during thermal shutdown." This provides a direct fault indicator to the host system, enabling immediate thermal fault response (e.g., fan activation or processor throttling) without requiring additional monitoring circuitry.
What is the maximum continuous output current capability of the MAX17501HATB+?
The MAX17501HATB+ delivers up to 500mA of continuous output current, verified across the full operating temperature range (–40°C to +125°C) and input voltage range (4.5V to 60V). This rating accounts for thermal limits and internal MOSFET RDS-ON degradation at elevated junction temperatures, and is supported by the Absolute Maximum Ratings (LX Total RMS Current = ±1.6A) and Electrical Characteristics tables.
MAX17501HATB+ 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 55.2V
- Current - Output:
- 500mA
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (3x2)
MAX17501HATB+ FAQ
1.How can I place an order for MAX17501HATB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17501HATB+ 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 MAX17501HATB+ reliable?
The price and inventory of MAX17501HATB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17501HATB+ is usually 5 days.
3.What payment methods are accepted for MAX17501HATB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17501HATB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17501HATB+?
MAX17501HATB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17501HATB+ 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 MAX17501HATB+?
For technical support, including MAX17501HATB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17501HATB+ requirements.
6.How does Aetrix verify that MAX17501HATB+ is sourced from the original manufacturer or authorized distributors?
All MAX17501HATB+ 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 MAX17501HATB+ meets industry standards.
7.What is the process for return or replacement of MAX17501HATB+?
All MAX17501HATB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17501HATB+, 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 MAX17501HATB+ part is unused and in its original packaging.
Return procedure for MAX17501HATB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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