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Analog Devices Inc./Maxim Integrated MAX17542GATB+T
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- Part No.:
- MAX17542GATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17542GATB+T.pdf
- Description:
- IC REG BUCK ADJ 1A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,416
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Product details
Overview
MAX17542GATB+T from Maxim Integrated is a high-efficiency, synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, operating from 4.5V to 42V input and delivering up to 1A output current with adjustable 0.9V–0.92×VIN output voltage. It features ±1.7% FB regulation accuracy over –40°C to +125°C, fixed 600kHz switching frequency, and built-in hiccup-mode overcurrent protection - deployed in industrial process control power rails and telecom point-of-load supplies.
For engineers reviewing the MAX17542GATB+T datasheet, MAX17542GATB+T pinout, MAX17542GATB+T application, or MAX17542GATB+T equivalent, key selection criteria include its ultra-small 10-pin TDFN (3mm × 2mm) package, integrated MOSFETs eliminating external Schottky diodes, programmable EN/UVLO threshold, RESET output with 92.5% undervoltage trip, and peak-current-mode control enabling stable operation with all-ceramic output capacitors.
Technical Context
The MAX17542GATB+T implements peak-current-mode control using an internal transconductance error amplifier (GM = 590µS typ), PWM comparator, slope compensation, and cycle-by-cycle current sensing via integrated high-side (RDS(on)H = 0.85Ω typ at +25°C) and low-side (RDS(on)L = 0.35Ω typ at +25°C) MOSFETs. Its fixed 600kHz switching frequency remains stable across load and temperature, with minimum on-time of 120ns and maximum duty cycle of 94%.
It integrates a 5V LDO (VCC) capable of sourcing 40mA, programmable soft-start via external capacitor on SS pin, open-drain RESET with 1024-cycle delay after regulation recovery, and dual overcurrent protection: peak limit (1.65A typ) and runaway limit (1.7A typ), triggering hiccup mode after one event with 32,768-cycle timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 42V - supports wide industrial and telecom input buses without pre-regulation. |
| Output Current | Up to 1A continuous - sufficient for FPGA I/O, microcontroller cores, and sensor signal chains. |
| Switching Frequency | Fixed 600kHz - enables compact magnetics and reduces EMI fundamental below 1MHz. |
| Feedback Accuracy | ±1.7% over –40°C to +125°C - ensures tight output regulation in harsh ambient conditions. |
| Shutdown Current | 0.9µA typical - minimizes battery drain in always-on industrial monitoring systems. |
| Thermal Shutdown | 165°C with 10°C hysteresis - protects against sustained overload while allowing safe recovery. |
| Package | 10-pin TDFN (3mm × 2mm) with exposed pad - delivers θJA = 67.3°C/W for high-power-density PCB layouts. |
Pinout & Package
MAX17542GATB+T is housed in a 10-pin, 3mm × 2mm TDFN package with exposed thermal pad (EP) connected to GND. The compact footprint supports ultra-dense industrial and telecom PCBs while enabling efficient heat dissipation via thermal vias to internal ground planes.
| 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 near VCC bypass cap. |
| 2 VIN | Input Supply | Accepts 4.5V–42V; requires ≥2.2µF ceramic input capacitance placed adjacent to pin. |
| 3 EN/UVLO | Enable / Input UVLO Input | Resistive divider sets turn-on threshold (e.g., 1.218V rising); pull high to VIN for always-on operation. |
| 4 VCC | Internal 5V LDO Output | Supplies internal logic and gate drivers; bypass with 1µF ceramic to GND. |
| 5 FB | Feedback Input | Monitors output via resistive divider; regulates VOUT to 0.9V reference with ±1.7% accuracy. |
| 6 SS | Soft-Start Control | Capacitor to GND sets ramp time; prevents inrush current during power-up into prebiased outputs. |
| 7 COMP | Loop Compensation | Connects external RC network to stabilize control loop; supports high-bandwidth response with ceramic output caps. |
| 8 RESET | Open-Drain Reset Output | Asserts low when VOUT falls below 92.5% of target; releases high after 1024 cycles above 95.5%. |
| 9 GND | Analog Ground | Reference for FB, COMP, SS; kept separate from PGND until single-point tie at VCC bypass cap. |
| 10 LX | Switching Node | Connects to inductor; high-impedance during shutdown; requires short, low-inductance trace to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | Eliminates external Schottky diode, reducing BOM count and improving efficiency >90% at full load. |
| All-Ceramic Capacitor Support | Enables ultra-compact layout with X7R/X5R ceramics on input/output - no electrolytics required. |
| Programmable EN/UVLO Threshold | Configurable startup voltage (e.g., 12V or 24V bus) via resistor divider on EN/UVLO pin. |
| Built-In Output Monitoring | RESET pin provides system-level fault signaling with precise 92.5%/95.5% VOUT thresholds. |
| Hiccup-Mode Overcurrent Protection | Shuts down for 32,768 clock cycles upon peak or runaway current limit violation - limits thermal stress. |
| Prebiased Power-Up Capability | Prevents reverse current flow when starting into existing VOUT - critical for hot-swap and redundant supplies. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering PLC I/O modules and analog sensor front-ends in factory automation cabinets with 24V DC bus. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 24V bus to 3.3V/5V for microcontrollers and ADCs. Use Value: ±1.7% regulation accuracy and –40°C to +125°C operation ensure reliable data acquisition under thermal cycling. |
Use Scenario: Supplying HVAC controller boards mounted inside air handling units exposed to wide ambient swings. IC Role / Device Role / Timing Role: Synchronous buck converter generating stable 5V rail for MCU, display, and communication interfaces. Use Value: Hiccup-mode protection prevents latch-up during motor surge events; RESET output triggers system fault logging. |
| Base Station & Telecom | Battery-Powered Equipment |
Use Scenario: Providing bias voltage to RF front-end ICs and Ethernet PHYs in small-cell base stations with 48V PoE-derived input. IC Role / Device Role / Timing Role: High-voltage step-down regulator delivering 3.3V at 1A with minimal board area. Use Value: 42V max input withstands telecom transients; 600kHz switching allows use of miniature 22µH inductors. |
Use Scenario: Power management in portable test equipment powered by 12V Li-ion packs with variable state-of-charge. IC Role / Device Role / Timing Role: Adjustable-output buck converter maintaining 3.3V rail as battery discharges from 12.6V to 9V. Use Value: 0.9V–0.92×VIN range accommodates declining input; 0.9µA shutdown current extends runtime in sleep mode. |
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 | Automotive-grade AEC-Q100 qualified; 3V–65V input; 1A output; requires external MOSFETs. | Targeted for automotive infotainment and ADAS; lacks integrated FETs and RESET output. | Choose LM5164QDDARQ1 only if AEC-Q100 compliance is mandatory and external FET layout is acceptable. |
| TPS54240DGQR | 4.5V–40V input; 2.5A output; external MOSFETs; no integrated RESET or hiccup mode. | Higher current capability but larger solution size; less suited for space-constrained industrial modules. | Select TPS54240DGQR when >1A load is needed and board area is not constrained. |
Compared with LM5164QDDARQ1 and TPS54240DGQR, MAX17542GATB+T offers the smallest footprint (3mm × 2mm), fully integrated power stage, and system-level features like RESET and hiccup protection - making it optimal for compact, self-contained industrial and telecom point-of-load designs where reliability and layout simplicity are prioritized over raw current headroom or automotive qualification.
Availability
MAX17542GATB+T is available at Aetrix Electronics and suitable for industrial process control, HVAC and building control, and telecom base station applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17542GATB+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 precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX17542GATB+T belongs to Maxim's high-voltage synchronous buck regulator family, engineered for compact, high-efficiency point-of-load conversion in harsh environments where wide input range, thermal robustness, and integrated protection are essential.
FAQ
What is the absolute maximum input voltage rating for MAX17542GATB+T?
The MAX17542GATB+T has an absolute maximum VIN-to-GND rating of +48V. Operation beyond 42V is not recommended, as the device is specified for reliable performance only up to 42V input. Exceeding +48V may cause permanent damage per the Absolute Maximum Ratings table.
Does MAX17542GATB+T support prebiased output startup?
Yes, MAX17542GATB+T supports prebiased output startup. When enabled into an existing output voltage, both high-side and low-side switches remain off until the first PWM pulse is commanded, preventing reverse current flow and ensuring smooth ramp-up aligned with the internal reference.
What is the function of the RESET pin on MAX17542GATB+T?
The RESET pin on MAX17542GATB+T is an open-drain output that asserts low when FB drops below 92.5% of its regulated value and releases high 1024 switching cycles after FB rises above 95.5%. It requires an external pullup resistor and is valid only when the device is enabled and VIN > 4.5V.
Can MAX17542GATB+T operate with all-ceramic output capacitors?
Yes, MAX17542GATB+T is explicitly designed for all-ceramic capacitor operation. Its peak-current-mode control and compensation architecture provide stable regulation with X7R/X5R ceramic output capacitors - eliminating need for bulk electrolytics and enabling ultra-compact layouts.
What thermal protection mechanisms does MAX17542GATB+T include?
MAX17542GATB+T includes thermal shutdown at +165°C junction temperature with 10°C hysteresis, and hiccup-mode overcurrent protection triggered by peak (1.65A) or runaway (1.7A) current limits. Both mechanisms limit power dissipation and enable automatic recovery after fault clearance.
MAX17542GATB+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):
- 42V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 38.64V
- Current - Output:
- 1A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (3x2)
MAX17542GATB+T FAQ
1.How can I place an order for MAX17542GATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17542GATB+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 MAX17542GATB+T reliable?
The price and inventory of MAX17542GATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17542GATB+T is usually 5 days.
3.What payment methods are accepted for MAX17542GATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17542GATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17542GATB+T?
MAX17542GATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17542GATB+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 MAX17542GATB+T?
For technical support, including MAX17542GATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17542GATB+T requirements.
6.How does Aetrix verify that MAX17542GATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17542GATB+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 MAX17542GATB+T meets industry standards.
7.What is the process for return or replacement of MAX17542GATB+T?
All MAX17542GATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17542GATB+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 MAX17542GATB+T part is unused and in its original packaging.
Return procedure for MAX17542GATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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