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Analog Devices Inc./Maxim Integrated MAX17501GATB+T
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- Part No.:
- MAX17501GATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17501GATB+T.pdf
- Description:
- IC REG BUCK ADJ 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
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Product details
Overview
MAX17501GATB+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 - used in industrial power rails requiring compact, high-efficiency point-of-load regulation.
For engineers reviewing the MAX17501GATB+T datasheet, MAX17501GATB+T pinout, MAX17501GATB+T application, or MAX17501GATB+T equivalent, key selection criteria include its 4.5V–60V wide input range, PFM light-load efficiency mode, programmable EN/UVLO threshold, soft-start timing via external capacitor, and open-drain RESET signal for system power sequencing.
Technical Context
The MAX17501GATB+T implements peak-current-mode control with internal transconductance error amplifier (GM = 590 µS), slope compensation, and PWM comparator driving integrated MOSFETs. It supports both PFM (for >90% light-load efficiency) and forced-PWM operation - the latter maintaining fixed 600kHz switching across all loads to meet EMI-sensitive requirements.
Its architecture includes a 5V internal LDO (VCC) sourcing up to 40mA, hiccup-mode overcurrent protection triggered by 0.78A runaway current limit, thermal shutdown at 165°C with 10°C hysteresis, and prebiased start-up capability that prevents output sinking during power-up into an already-biased rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - enables direct regulation from 12V, 24V, 36V, 48V, and 56V industrial bus rails without pre-regulation. |
| Output Voltage | Fixed 5.0V ±1.7% - guaranteed accuracy over full –40°C to +125°C ambient, eliminating need for external feedback resistors. |
| Max Output Current | 500mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained systems. |
| Switching Frequency | 600kHz (typ) - allows use of small, low-profile inductors (e.g., 4.7µH) and ceramic output capacitors for ultra-compact layout. |
| Peak Efficiency | >90% at 24VIN/5VOUT/250mA - achieved via low RDS(ON) (0.85Ω high-side / 0.35Ω low-side) integrated MOSFETs. |
| Shutdown Current | 0.9µA (typ) - minimizes battery drain in always-on industrial monitoring nodes and remote sensors. |
| Soft-Start Time | Programmable via external SS capacitor - controls inrush current during power-up to prevent input rail sag or upstream supply overload. |
Pinout & Package
MAX17501GATB+T is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) connected to GND for thermal performance. Pin functions are validated per Maxim's official pin description table and block diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | Low-impedance return path for high di/dt LX current; 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 close to pin for stability and EMI suppression. |
| 3 EN/UVLO | Enable & Input UVLO Threshold | Resistor-divider programmable turn-on threshold (1.218V typ rising); pull high to VIN for always-on operation. |
| 4 VCC | Internal 5V LDO Output | Bypass 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 | Internally connected to 5V reference for fixed-output version; no external resistor divider required. |
| 6 SS | Soft-Start Timing | Capacitor-to-GND sets ramp time; disables internal reference until SS charges to ~0.95V, preventing output overshoot. |
| 7 N.C./COMP | No Connect (Fixed-Output) | Not connected on MAX17501G - reserved for external compensation only on adjustable-output variants (e.g., MAX17501H). |
| 8 RESET | Open-Drain Power-Good | Asserts low when VOUT < 92.5% of 5V; releases high after 1024 cycles once VOUT > 95.5%; requires external pull-up. |
| 9 GND | Analog Ground | Reference for FB, COMP, SS, RESET; must be star-connected to PGND at single point near VCC bypass cap. |
| 10 LX | Switching Node | Connects to inductor switch node; carries high dv/dt; must be routed short and away from sensitive analog traces. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification with integrated MOSFETs | Eliminates external Schottky diode, reduces BOM count, and improves full-load efficiency by >5% vs. asynchronous designs. |
| PFM light-load efficiency mode | Reduces no-load quiescent current to <145µA and maintains >85% efficiency at 1mA load - critical for battery longevity. |
| Hiccup-mode overcurrent protection | Triggers after one runaway current event (>0.78A), suspends switching for 32,768 cycles (~54ms at 600kHz), then retries - limits fault power dissipation to <1.2mW average. |
| Prebiased power-up support | Prevents reverse current flow into precharged output rail by holding both MOSFETs off until soft-start initiates - avoids system reset or latch-up. |
| Integrated 5V VCC LDO | Self-powered operation from VIN; delivers up to 40mA to drive external loads (e.g., level shifters, bias networks) without secondary supply. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering 4–20mA loop transmitters and isolated ADCs in factory-floor PLC I/O modules. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator converting 24V DC field bus to clean, regulated 5V for analog front-end and microcontroller core. Use Value: 60V absolute max rating withstands 48V surge transients per IEC 61000-4-5; ±1.7% output accuracy ensures precise sensor excitation and reference stability. |
Use Scenario: Supplying HVAC controller boards with embedded Wi-Fi/BLE radios, temperature/humidity sensors, and valve drivers. IC Role / Device Role / Timing Role: Main 5V rail generator enabling simultaneous operation of RF SoC, precision analog sensors, and motor gate drivers. Use Value: 600kHz switching allows compact 3mm × 3mm inductor footprint; PFM mode extends battery backup runtime during AC loss events. |
| Base Station & Telecom | Battery-Powered Equipment |
Use Scenario: Providing auxiliary 5V supply for fan controllers, status LEDs, and management ASICs in 48V telecom rectifier shelves. IC Role / Device Role / Timing Role: Secondary regulator deriving stable 5V from primary 48V intermediate bus, independent of main DC-DC converter load dynamics. Use Value: Wide 4.5V–60V input accommodates brownout and hot-swap conditions; hiccup-mode protection prevents thermal runaway during short-circuit faults on downstream PCBs. |
Use Scenario: Powering portable gas detectors, handheld test meters, and wireless sensor nodes operating from Li-ion or 4xAA alkaline packs. IC Role / Device Role / Timing Role: Efficient buck converter stepping down variable battery voltage (6V–36V) to fixed 5V for MCU, display, and comms ICs. Use Value: 0.9µA shutdown current preserves battery life during sleep; prebiased start-up avoids output collapse when powered from partially discharged cells. |
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 |
|---|---|---|---|
| LM5164QDRCRQ1 | Automotive-grade (AEC-Q100), 65V input, 300mA output, 400kHz fixed freq, no PFM mode. | Requires external feedback resistors; lacks RESET output and programmable EN/UVLO. | Choose for automotive under-hood applications requiring qualification; not drop-in due to lower current and missing features. |
| TPS54360DGQR | 60V input, 3.5A output, 100–2500kHz adjustable freq, external MOSFETs, no integrated LDO. | Higher current but larger solution size; requires external VDD bias and compensation network. | Choose when >500mA load or design flexibility outweighs board area constraints; not pin-compatible. |
Compared with LM5164QDRCRQ1 and TPS54360DGQR, the MAX17501GATB+T delivers optimal integration (integrated FETs + VCC LDO + RESET), smallest footprint (3mm × 2mm), and lowest quiescent current - making it ideal for space- and power-constrained industrial point-of-load designs where 500mA suffices.
Availability
MAX17501GATB+T is available at Aetrix Electronics and suitable for industrial process control, HVAC systems, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX17501GATB+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, communications, and computing markets.
The MAX17501 product line targets ultra-compact, high-voltage DC-DC conversion in harsh environments - emphasizing wide input range, integrated power stages, and robust protection for reliable operation from –40°C to +125°C.
FAQ
What is the output voltage tolerance of the MAX17501GATB+T over temperature?
The MAX17501GATB+T guarantees ±1.7% output voltage accuracy across the full –40°C to +125°C ambient operating temperature range. This specification is verified per Maxim's Electrical Characteristics table and applies to the fixed 5V output version without external trimming components.
Does the MAX17501GATB+T support prebiased start-up?
Yes, the MAX17501GATB+T supports prebiased start-up: both high-side and low-side MOSFETs remain off until the soft-start sequence begins, preventing reverse current flow into an already energized output rail - a critical feature for hot-swap and redundant power systems.
What is the function of the N.C./COMP pin on the MAX17501GATB+T?
On the MAX17501GATB+T, the N.C./COMP pin is a no-connect (N.C.) because it is the fixed 5V output variant. External compensation is only required for adjustable-output versions (e.g., MAX17501H); this pin must be left unconnected and floating on the MAX17501GATB+T.
How does the RESET pin on the MAX17501GATB+T behave during thermal shutdown?
During thermal shutdown, the RESET pin on the MAX17501GATB+T is actively driven low - providing a system-level fault indication that complements the power-good functionality. RESET remains low until junction temperature drops below 155°C and output regulation is re-established above 95.5% of 5V.
Can the MAX17501GATB+T operate with an input voltage below 4.5V?
No - the absolute minimum operating input voltage for the MAX17501GATB+T is 4.5V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this voltage may result in improper regulation, failure to start, or undefined behavior; the device enters undervoltage lockout below 4.5V.
MAX17501GATB+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:
- 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:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (3x2)
MAX17501GATB+T FAQ
1.How can I place an order for MAX17501GATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17501GATB+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 MAX17501GATB+T reliable?
The price and inventory of MAX17501GATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17501GATB+T is usually 5 days.
3.What payment methods are accepted for MAX17501GATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17501GATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17501GATB+T?
MAX17501GATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17501GATB+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 MAX17501GATB+T?
For technical support, including MAX17501GATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17501GATB+T requirements.
6.How does Aetrix verify that MAX17501GATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17501GATB+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 MAX17501GATB+T meets industry standards.
7.What is the process for return or replacement of MAX17501GATB+T?
All MAX17501GATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17501GATB+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 MAX17501GATB+T part is unused and in its original packaging.
Return procedure for MAX17501GATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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