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Analog Devices Inc./Maxim Integrated MAX15020ATP+
- Part No.:
- MAX15020ATP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX15020ATP+.pdf
- Description:
- IC REG BUCK ADJ 2A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:489
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Product details
Overview
The MAX15020ATP+ from Maxim Integrated is a high-voltage, 2A synchronous step-down DC-DC converter with dynamic output-voltage programming (0.5V to 36V), integrated 0.2Ω high-side MOSFET, and feed-forward voltage-mode control architecture. It operates from 7.5V to 40V input, delivers up to 96% efficiency, and supports 300kHz/500kHz selectable or externally synchronized switching (100–500kHz). It is used in industrial power supplies requiring wide-input, programmable-rail regulation.
For engineers reviewing the MAX15020ATP+ datasheet, MAX15020ATP+ pinout, MAX15020ATP+ application, or MAX15020ATP+ equivalent, key selection considerations include its 20-pin TQFN-EP package, -40°C to +125°C operation, 6μA shutdown current, configurable UVLO/soft-start, and cycle-by-cycle current limiting with hiccup-mode short-circuit protection.
Technical Context
The MAX15020ATP+ implements a feed-forward voltage-mode control loop with external compensation via the COMP pin, enabling stable regulation across wide VIN and VOUT ranges. Its internal ramp amplitude automatically adjusts to maintain constant VIN/VRAMP = 9 V/V, simplifying loop design for varying input voltages (7.5V–40V) and SYNC frequencies (100kHz–500kHz).
It integrates an 8V internal LDO (REG) powering digital circuitry via DVREG, a 0.98V precision reference (REFOUT), and REFIN-based feedback that directly sets FB voltage - enabling true dynamic output programming without resistor-divider recalibration. Protection includes thermal shutdown at +160°C (20°C hysteresis), 4-event hiccup counter, and lossless current limit with 2.5A–4.5A trip range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 40V - supports wide industrial bus rails including 12V, 24V, and 36V systems without pre-regulation. |
| Output Current | 2A continuous - sufficient for powering FPGAs, microcontrollers, and analog subsystems in embedded controllers. |
| Output Voltage Range | 0.5V to 36V dynamically programmable via REFIN - enables single-design flexibility across multiple output rails. |
| Switching Frequency | 300kHz or 500kHz selectable; synchronizable to 100–500kHz external clock - allows EMI optimization and multi-rail synchronization. |
| Shutdown Current | 6μA typical - ensures ultra-low standby power in battery-backed or energy-sensitive applications. |
| Max Duty Cycle | 95% typical at 300kHz - supports high step-down ratios (e.g., 40V→3.3V) while maintaining regulation margin. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and factory automation environments. |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced layout with exposed pad for efficient heat dissipation in compact PCBs. |
Pinout & Package
MAX15020ATP+ is housed in a 20-pin, 5mm × 5mm thin quad flat no-lead package with exposed thermal pad (TQFN-EP). Pin 1 is COMP; pins 13–15 are LX (common source node); pins 16–18 are IN (parallel input connections); pin 20 is GND; EP must be soldered to a large ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COMP | Voltage-error-amplifier output | Connects to external RC compensation network to stabilize feedback loop across full operating range. |
| FB | Feedback regulation point | Senses output voltage divider; regulates to voltage applied at REFIN - enables direct dynamic VOUT control. |
| ON/OFF | Enable/disable control input | 1.225V threshold with 120mV hysteresis; supports power sequencing and UVLO override via resistive divider. |
| REFIN / REFOUT | External reference input / 0.98V ref output | REFOUT feeds internal 0.98V reference; REFIN accepts 0–3.6V DC or PWM-derived voltage to set VOUT precisely. |
| SYNC / FSEL | External clock sync input / frequency select | SYNC accepts 100–500kHz external clock; FSEL selects 300kHz (to REG) or 500kHz (to GND) when SYNC disabled. |
| LX | Switch node | Connects to inductor and freewheeling diode/capacitor; carries high di/dt switching current - requires tight layout and low-inductance path. |
| IN / PGND / GND / EP | Power input / power ground / signal ground / exposed pad | IN and PGND handle high-current paths; GND and EP must be connected at single-point near input capacitor for noise control. |
Key Features
| Feature | Design Value |
|---|---|
| Feed-forward voltage-mode control | Maintains constant modulator gain (VIN/VRAMP = 9 V/V) across 7.5–40V input and 100–500kHz frequency - eliminates need for input-voltage feedforward compensation. |
| Dynamic output-voltage programming | REFIN accepts 0–3.6V DC or filtered PWM to set VOUT from 0.5V to 36V without changing feedback resistors - ideal for adaptive power rails. |
| Configurable soft-start | 15μA SS charge current into external capacitor enables precise control of output ramp rate - prevents inrush current and supports power sequencing. |
| Hiccup-mode short-circuit protection | Four consecutive current-limit events trigger 512-clock-period shutdown and automatic soft-start restart - protects against sustained output shorts without latch-off. |
| Lossless cycle-by-cycle current limit | Measures switch current without sense resistor; trip threshold 2.5–4.5A - preserves efficiency and reduces BOM count vs. discrete sense solutions. |
| Thermal shutdown with hysteresis | Shuts down at +160°C; restarts after 20°C cooldown - prevents thermal runaway during overload or poor heatsinking conditions. |
Applications
| Printer Head Driver Power Supply | Industrial Power Supply |
|---|---|
Use Scenario: Powers thermal print head arrays requiring precise, adjustable voltage (e.g., 12V–24V) and fast transient response during pulse-driven heating cycles. IC Role / Device Role / Timing Role: Primary step-down regulator delivering dynamically programmed output voltage and current-limited drive to heater elements. Use Value: Enables single-supply compatibility across multiple printer models via REFIN voltage adjustment; hiccup mode prevents damage during nozzle clogging-induced shorts. | Use Scenario: Provides regulated 3.3V, 5V, or 12V rails in PLC I/O modules, motor drive logic, or sensor interface boards operating from 24V DC industrial buses. IC Role / Device Role / Timing Role: High-efficiency, wide-input buck converter supplying isolated or non-isolated secondary rails with robust overvoltage/overcurrent protection. Use Value: 7.5V–40V input range accommodates brownout and surge conditions; -40°C to +125°C rating ensures reliability in uncontrolled cabinet environments. |
| Step-Down Power Supply | Automotive Body Control Module (BCM) |
Use Scenario: Generates stable low-voltage rails (e.g., 3.3V for MCU, 5V for CAN transceivers) from 12V/24V vehicle batteries subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Main DC-DC regulator with UVLO hysteresis and soft-start for controlled power-up sequencing in automotive subsystems. Use Value: 6μA shutdown current minimizes battery drain; 40V absolute max rating withstands ISO 7637-2 pulse 5a (load dump); TQFN-EP aids thermal management in sealed enclosures. | Use Scenario: Supplies programmable bias voltage to LED drivers or window lift motor controllers where output voltage must scale with ambient temperature or user input. IC Role / Device Role / Timing Role: Programmable buck controller accepting analog or PWM signals on REFIN to adjust VOUT in real time. Use Value: Eliminates need for DAC + op-amp + external regulator; REFIN-to-VOUT tracking accuracy ±5mV enables closed-loop brightness or torque control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 42V input, 1A output, 1.5MHz fixed freq, no REFIN-based dynamic programming; uses current-mode control. | Lower current capability; lacks true dynamic VOUT adjustment - requires external DAC/resistor network for variable output. | Choose for higher-frequency, space-constrained designs where 1A suffices and dynamic programming is not required. |
| TPS54240DGQR | 42V input, 2.5A output, 100kHz–2.5MHz sync range, but only fixed internal reference (0.8V) - no REFIN pin or dynamic programming. | Higher current and wider sync range, but output voltage set solely by resistor divider - no analog/PWM-based real-time adjustment. | Choose when higher peak current and broader sync flexibility are critical, and output voltage is static per design. |
Compared with LM5164QPWPRQ1 and TPS54240DGQR, the MAX15020ATP+ uniquely supports true dynamic output-voltage programming via REFIN without external components, making it optimal for adaptive power architectures where VOUT must change during operation - a capability neither alternative provides.
Availability
MAX15020ATP+ is available at Aetrix Electronics and suitable for industrial power supply, printer head driver, and automotive body control module applications requiring stable component supply, extended temperature operation, and programmable output voltage.
Supply support for MAX15020ATP+ 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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX15020ATP+ belongs to Maxim's high-voltage DC-DC converter product line, engineered specifically for wide-input, programmable-output power conversion in harsh-environment systems where reliability, thermal performance, and design flexibility are critical.
FAQ
What is the maximum output voltage achievable with the MAX15020ATP+?
The MAX15020ATP+ supports a dynamically programmable output voltage range from 0.5V to 36V, set directly by the voltage applied to the REFIN pin. When REFIN is tied to the internal 0.98V reference (REFOUT), the output is regulated to 0.98V × (R7/R8 + 1); when driven externally from 0V to 3.6V, VOUT tracks linearly from 0.5V to 36V. This range is confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure toc21).
Does the MAX15020ATP+ require external compensation components?
Yes, the MAX15020ATP+ requires external compensation via the COMP pin using a Type II or Type III network (typically two resistors and one capacitor). Its voltage-mode architecture and feed-forward design necessitate external loop compensation to ensure stability across all operating conditions - detailed in the Compensation Design section (pages 13–14 of the datasheet).
Can the MAX15020ATP+ synchronize to an external clock, and what is the valid frequency range?
Yes, the MAX15020ATP+ can synchronize its switching frequency to an external clock applied to the SYNC pin over a range of 100kHz to 500kHz. When using SYNC, the FSEL pin must be connected to REG. The device locks to the rising edge of the external clock, enabling deterministic timing and EMI reduction in multi-converter systems.
What protection features does the MAX15020ATP+ include?
The MAX15020ATP+ integrates cycle-by-cycle current limiting, hiccup-mode short-circuit protection (triggered after four consecutive overcurrent events), thermal shutdown at +160°C with 20°C hysteresis, and configurable undervoltage lockout. These protections are fully specified in the Absolute Maximum Ratings and Electrical Characteristics sections and operate independently of external components.
Is the MAX15020ATP+ RoHS-compliant and lead-free?
Yes, the MAX15020ATP+ is RoHS-compliant and lead-free, as indicated by the "+" suffix in the part number per Maxim's ordering information. The device meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for reflow soldering with a peak temperature of +300°C (10-second duration).
MAX15020ATP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 36V
- Current - Output:
- 2A
- Frequency - Switching:
- 300kHz ~ 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX15020ATP+ FAQ
1.How can I place an order for MAX15020ATP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15020ATP+ 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 MAX15020ATP+ reliable?
The price and inventory of MAX15020ATP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15020ATP+ is usually 5 days.
3.What payment methods are accepted for MAX15020ATP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15020ATP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15020ATP+?
MAX15020ATP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15020ATP+ 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 MAX15020ATP+?
For technical support, including MAX15020ATP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15020ATP+ requirements.
6.How does Aetrix verify that MAX15020ATP+ is sourced from the original manufacturer or authorized distributors?
All MAX15020ATP+ 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 MAX15020ATP+ meets industry standards.
7.What is the process for return or replacement of MAX15020ATP+?
All MAX15020ATP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX15020ATP+, 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 MAX15020ATP+ part is unused and in its original packaging.
Return procedure for MAX15020ATP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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