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Analog Devices Inc./Maxim Integrated MAX15041AETE+
- Part No.:
- MAX15041AETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX15041AETE+.pdf
- Description:
- IC REG BUCK ADJ 3A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,871
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Product details
Overview
MAX15041AETE+ from Maxim Integrated is a synchronous step-down DC-DC regulator with integrated 170mΩ high-side and 105mΩ low-side MOSFETs, delivering up to 3A continuous output current. It operates from 4.5V to 28V input, supports adjustable output from 0.606V to 90% of VIN via external resistive divider, and features fixed 350kHz PWM switching with 90% max duty cycle-ideal for preregulation in set-top boxes and consumer TVs.
For engineers reviewing the MAX15041AETE+ datasheet, MAX15041AETE+ pinout, MAX15041AETE+ application, or MAX15041AETE+ equivalent, key selection considerations include its ±1% FB set-point accuracy over temperature, safe startup into prebiased outputs, cycle-by-cycle overcurrent protection, and compatibility with all-ceramic output capacitor designs.
Technical Context
The MAX15041AETE+ implements peak-current-mode PWM control with an internally fixed 350kHz oscillator and a 90% maximum duty cycle, enabling stable regulation across wide input/output ratios. Its transconductance error amplifier (1.6mS typ) and type-II compensation support robust loop stability with ceramic-only output filters.
Thermal shutdown triggers at +155°C (20°C hysteresis), and hiccup-mode overcurrent protection activates after repeated high-side sourcing (>6A typ) or low-side sinking (–3A typ) events. The device integrates a 5.1V LDO (4.75–5.5V range, 80mA max) with undervoltage lockout at 4.25V, and supports independent enable sequencing and open-drain power-good signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports wide-range industrial and consumer DC inputs including 12V/24V rails and wall adapters. |
| Output Current | Up to 3A continuous - sufficient for powering core logic, memory, and interface ICs in embedded systems. |
| Output Voltage Range | 0.606V to 0.9 × VIN - enables precise low-voltage core supplies (e.g., 1.2V, 1.8V, 3.3V) with external resistor divider. |
| Switching Frequency | 315–385kHz (typ 350kHz) - balances EMI performance, inductor size, and efficiency in compact layouts. |
| Efficiency | Up to 93% - achieved via low RDS(on) internal switches (170mΩ HS / 105mΩ LS) and synchronous rectification. |
| FB Set-Point Accuracy | ±1% over –40°C to +85°C - ensures tight output regulation without trimming, critical for voltage-sensitive loads. |
| Thermal Protection | +155°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
MAX15041AETE+ is housed in a thermally enhanced 3mm × 3mm, 16-pin TQFN-EP package with exposed pad soldered to SGND for optimal thermal dissipation (θJA = 48°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 15,16) | Primary input power supply | Accepts 4.5V–28V; requires ≥22µF low-ESR ceramic bypass to PGND near pin. |
| LX (Pins 10,11,12) | Switch node connection | Drives external inductor; high-impedance during shutdown/UVLO; clamped internally to PGND and IN. |
| BST (Pin 9) | Bootstrap supply for high-side gate driver | Requires 10nF ceramic cap to LX and external Schottky diode from VDD to BST. |
| VDD (Pin 1) | Internal 5.1V LDO output | Powers internal analog circuitry; bypass with ≥1µF ceramic cap to SGND; UVLO at 4.25V. |
| FB (Pin 5) | Feedback input | Senses output via resistor divider; 606mV nominal threshold; ±100nA bias current enables high-R divider use. |
| EN (Pin 3) | Enable control input | Digital on/off control; 1.95V typical turn-on threshold; connects to IN for always-on operation. |
| PGOOD (Pin 2) | Open-drain power-good indicator | Asserts low when FB < 545mV; deasserts high-impedance when FB > 560mV - enables safe power sequencing. |
| SS (Pin 6) | Soft-start timing control | Capacitor-to-SGND sets ramp time; supports programmable startup and prebiased output safe start. |
| COMP (Pin 4) | Error amplifier output | Connects external type-II compensation network (RC + C) to SGND for loop stability with ceramic caps. |
| SGND (Pin 7) | Analog ground reference | Must be connected to PGND at single point near input capacitor return to minimize noise coupling. |
| PGND (Pins 13,14) | Power ground return | Low-impedance return path for high-current LX and IN paths; ties to PCB ground plane under EP. |
| EP (Exposed Pad) | Thermal and electrical ground | Must be soldered to large SGND copper area; primary thermal path - critical for 3A operation at +85°C. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power switches | 170mΩ high-side + 105mΩ low-side MOSFETs - eliminate external FETs and drivers, reducing BOM count and layout sensitivity. |
| All-ceramic capacitor support | Stable with low-ESR ceramic output caps - enables compact, high-reliability designs without tantalum or electrolytics. |
| Safe prebiased startup | Starts without discharging existing output voltage - essential for hot-swap, rail sequencing, and redundant power systems. |
| Programmable soft-start | Capacitor-controlled ramp (e.g., 100nF → ~1ms) - limits inrush current and prevents input rail collapse during power-up. |
| Fully protected operation | Cycle-by-cycle overcurrent, thermal shutdown, hiccup mode, and VDD UVLO - ensures robust field reliability without external supervision. |
Applications
| Set-Top Boxes | Preregulation Systems |
|---|---|
|
Use Scenario: Powering SoC cores, DDR memory, and video decoders from 12V or 24V DC input rails. IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated 1.2V/1.8V/3.3V rails with fast transient response. Use Value: 93% peak efficiency and ±1% output accuracy maintain thermal headroom and signal integrity under dynamic video load changes. |
Use Scenario: Stepping down 24V/48V intermediate bus to 5V/3.3V for downstream point-of-load converters. IC Role / Device Role / Timing Role: High-input-voltage preregulator enabling efficient multi-rail distribution in telecom and industrial equipment. Use Value: 28V max input rating and 90% duty cycle allow direct conversion from 24V bus to 5V, eliminating cascaded stages and losses. |
| Consumer Televisions | xDSL Modems |
|
Use Scenario: Supplying main processor, panel timing controller, and audio amplifiers in slim LED/LCD TV chassis. IC Role / Device Role / Timing Role: Compact, thermally optimized DC-DC stage replacing discrete controllers and external MOSFETs. Use Value: 3mm × 3mm TQFN-EP package with exposed pad enables high-power density in space-constrained TV power boards. |
Use Scenario: Generating stable 3.3V and 1.8V supplies for DSL PHY, microcontroller, and line driver ICs. IC Role / Device Role / Timing Role: Efficient, low-noise local regulator meeting stringent EMI requirements for broadband communication devices. Use Value: Fixed 350kHz switching frequency and integrated MOSFETs reduce conducted/radiated emissions versus asynchronous alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z (Monolithic Power Systems) | 36V max input, 2A output, 2MHz switching, no prebias startup, different pinout | Better suited for space-constrained 2A designs needing higher fSW; lacks safe prebiased start and 3A capability | Select MP2451DT-LF-Z only if 2A output suffices and board layout allows rework for non-pin-compatible footprint. |
| TPS54331DR (Texas Instruments) | 28V max input, 3A output, 570kHz fSW, external MOSFETs required, no integrated LDO | Higher switching frequency enables smaller inductors but demands external FETs and gate drivers - increased complexity | Choose TPS54331DR only when design requires adjustable fSW or higher efficiency at light loads via external FET optimization. |
Compared with MP2451DT-LF-Z and TPS54331DR, the MAX15041AETE+ uniquely combines 3A capability, 28V input, integrated 5V LDO, and guaranteed safe startup into prebiased outputs - making it optimal for cost-sensitive, thermally constrained consumer power rails where reliability and simplicity are prioritized.
Availability
MAX15041AETE+ is available at Aetrix Electronics and suitable for distributed power systems, set-top boxes, and television power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX15041AETE+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX15041AETE+ belongs to Maxim's high-efficiency, integrated-power-stage DC-DC regulator family, designed specifically for cost-sensitive, space-constrained applications demanding robust protection, simple layout, and reliable operation across wide input ranges.
FAQ
What is the maximum output current capability of the MAX15041AETE+?
The MAX15041AETE+ delivers up to 3A of continuous output current under specified thermal conditions (TA ≤ +85°C, proper PCB copper area). Derating applies above ambient temperature - e.g., ~2.6A at +70°C with 2-layer board, per Figure toc19/toc20 in the datasheet. Peak current limit is 6A (high-side) and –3A (low-side), supporting short-term transients.
Does the MAX15041AETE+ support startup into a prebiased output?
Yes, the MAX15041AETE+ safely starts into prebiased outputs both below and above the target regulation voltage. It holds both MOSFETs off until the SS voltage crosses the FB threshold, preventing discharge of existing output capacitance. This behavior is confirmed in Figures toc17/toc18 and detailed in the "Starting into a Prebiased Output" section of the datasheet.
What is the recommended input and output capacitor configuration for the MAX15041AETE+?
For input, use ≥22µF low-ESR ceramic capacitor placed close to IN and PGND pins. For output, low-ESR ceramic capacitors are fully supported - total COUT depends on ripple requirements, but 22–100µF is typical. ESR contribution to ripple is negligible with ceramics; ripple is dominated by ∆IL × ESRINDUCTOR and switching frequency effects.
How is the output voltage set on the MAX15041AETE+?
The output voltage is set using an external resistive divider from VOUT to FB to SGND. With VFB = 606mV (typ), R1 = R2 × ((VOUT/0.606) – 1). A typical R2 value is 10kΩ, yielding <±0.1% error from FB bias current. Divider current should exceed 10× FB bias (±100nA) for precision - e.g., 100µA minimum.
What protection features does the MAX15041AETE+ include?
The MAX15041AETE+ includes cycle-by-cycle overcurrent protection (high-side sourcing and low-side sinking), thermal shutdown (+155°C trip, 20°C hysteresis), hiccup-mode fault recovery, VDD undervoltage lockout (4.25V), and safe prebiased startup. All protections are internal and require no external components - verified in Electrical Characteristics Table and Typical Operating Characteristics waveforms.
MAX15041AETE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 25.2V
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 80°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
MAX15041AETE+ FAQ
1.How can I place an order for MAX15041AETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15041AETE+ 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 MAX15041AETE+ reliable?
The price and inventory of MAX15041AETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15041AETE+ is usually 5 days.
3.What payment methods are accepted for MAX15041AETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15041AETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15041AETE+?
MAX15041AETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15041AETE+ 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 MAX15041AETE+?
For technical support, including MAX15041AETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15041AETE+ requirements.
6.How does Aetrix verify that MAX15041AETE+ is sourced from the original manufacturer or authorized distributors?
All MAX15041AETE+ 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 MAX15041AETE+ meets industry standards.
7.What is the process for return or replacement of MAX15041AETE+?
All MAX15041AETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX15041AETE+, 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 MAX15041AETE+ part is unused and in its original packaging.
Return procedure for MAX15041AETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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