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Analog Devices Inc./Maxim Integrated MAX15020ATP+T
- Part No.:
- MAX15020ATP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX15020ATP+T.pdf
- Description:
- IC REG BUCK ADJ 2A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:169
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Product details
Overview
The MAX15020ATP+T 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 features 300kHz/500kHz selectable switching frequency with external SYNC capability (100kHz–500kHz). It is used in industrial power supplies and printer head driver circuits requiring wide VIN range and programmable VOUT.
For engineers reviewing the MAX15020ATP+T datasheet, MAX15020ATP+T pinout, MAX15020ATP+T application, or MAX15020ATP+T equivalent, key selection considerations include its 20-pin TQFN-EP (5mm × 5mm) package, -40°C to +125°C operating temperature, 6μA shutdown current, cycle-by-cycle current limit (2.5A–4.5A), and configurable UVLO/soft-start - all critical for robust high-voltage buck design in space-constrained industrial systems.
Technical Context
The MAX15020ATP+T implements a feed-forward voltage-mode control architecture with external compensation, enabling stable loop design across wide input (7.5V–40V) and output (0.5V–36V) ranges. Its internal ramp amplitude automatically adjusts to maintain constant VIN/VRAMP = 9V/V, simplifying compensation over variable fSW (100kHz–500kHz) and line conditions.
It integrates a 0.2Ω high-side MOSFET switch rated for 4A peak current at TJ = +125°C, supports hiccup-mode short-circuit protection after four consecutive current-limit events, and includes thermal shutdown at +160°C with 20°C hysteresis. The device uses an 8V internal LDO (REG) to power digital circuitry via DVREG, with dedicated PGND and GND pins for optimal noise isolation.
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 FPGA I/O banks, motor drivers, or printer head arrays with margin. |
| Output Voltage Range | 0.5V to 36V dynamically programmable via REFIN - enables single-buck solutions for multiple rail generation using external DAC or PWM source. |
| Switching Frequency | 300kHz or 500kHz (pin-selectable); synchronizable to 100kHz–500kHz external clock - allows EMI reduction and multi-rail phase alignment. |
| Max Duty Cycle | 95% typical at 300kHz - supports high-step-down ratios (e.g., 40V → 3.3V) while maintaining regulation under low-VIN conditions. |
| Shutdown Current | 6μA typical - minimizes standby power in always-on industrial controllers or battery-backed systems. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive auxiliary supplies and industrial PLC power stages. |
| Package | 20-pin TQFN-EP (5mm × 5mm) - thermally enhanced for high-power density PCB layouts with exposed pad soldered to ground plane. |
Pinout & Package
MAX15020ATP+T is housed in a 20-pin, 5mm × 5mm, 0.5mm pitch thin quad flat no-lead package with exposed thermal pad (TQFN-EP). The exposed pad (EP) must be soldered to a large PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (COMP) | Voltage-error-amplifier output | Connects to external Type-II/III compensation network; open-loop gain = 80dB, GBW = 1.8MHz. |
| 2 (FB) | Feedback regulation point | Senses output voltage divider; regulates to voltage applied at REFIN (0–3.6V), not fixed reference. |
| 3 (ON/OFF) | Enable control with UVLO hysteresis | Rising threshold = 1.225V ±25mV; used for power sequencing or external shutdown with <0.2V logic. |
| 4 (REFOUT) | Internal 0.98V reference output | Bypass with 0.1μF ceramic; only for driving REFIN - not for external load powering. |
| 5 (SS) | Soft-start timing node | Charged by 15μA current; sets VOUT ramp rate - prevents inrush into large capacitive loads. |
| 6 (REFIN) | Dynamic reference input | Directly programs FB setpoint (0.5V–36V); accepts DC, DAC, or filtered PWM for closed-loop VOUT control. |
| 7 (FSEL) | Frequency select input | Connect to REG = 300kHz; connect to GND = 500kHz; must be REG when SYNC is active. |
| 8 (SYNC) | External clock synchronization input | Accepts 100kHz–500kHz TTL/CMOS clock; locks switching edge to rising edge of external signal. |
| 9 (DVREG) | Digital supply input | Powered via 10Ω resistor from REG; bypass with ≥1μF ceramic - powers internal logic and gate drivers. |
| 10 (PGND) | Power ground return | Return path for high-current LX node, input capacitor, and freewheeling diode - separate from signal GND. |
| 12 (BST) | Bootstrap supply for high-side gate driver | Connected to boost capacitor cathode; enables full enhancement of internal 0.2Ω MOSFET. |
| 13–15 (LX) | Switch node | Drives external inductor; handles peak currents up to 4.5A during hiccup-mode short-circuit events. |
| 16–18 (IN) | Main power input | Accepts 7.5V–40V; requires bulk and ceramic input capacitance to suppress ripple and avoid UVLO dropout. |
| 19 (REG) | 8V internal LDO output | Bypass with ≥1μF ceramic; powers internal analog/digital blocks - not for external loads. |
| 20 (GND) | Signal ground reference | Low-noise reference for FB, COMP, REFOUT; tie to PGND at single point near input capacitor. |
| EP | Exposed thermal pad | Mandatory solder connection to PCB ground plane - improves thermal resistance by >30% vs. non-connected pad. |
Key Features
| Feature | Design Value |
|---|---|
| Feed-forward voltage-mode control | Automatically maintains constant VIN/VRAMP = 9V/V across 7.5V–40V input and 100kHz–500kHz fSW - eliminates need for input-voltage feedforward compensation. |
| Dynamic output-voltage programming | REFIN accepts 0–3.6V input to set VOUT from 0.5V to 36V with ±5mV tracking accuracy - enables real-time rail adjustment in test equipment or adaptive systems. |
| Programmable soft-start slew rate | VSS ramp rate controlled by CSS value and 15μA charge current - allows precise control of VOUT rise time to prevent overshoot on sensitive loads. |
| Hiccup-mode short-circuit protection | Four consecutive cycle-by-cycle current-limit events trigger 512-clock-period shutdown and auto-restart - protects MOSFET and inductor during sustained overload without thermal runaway. |
| Configurable UVLO with hysteresis | UVLO rising threshold = 7.2V ±0.2V; hysteresis = 0.7V - prevents oscillation during brown-out conditions in unregulated industrial supplies. |
| Lossless current sensing | Integrated current-limit comparator uses MOSFET RDS(ON) - eliminates sense resistor, saves board space, and avoids I²R losses in high-current paths. |
Applications
| Printer Head Driver Power Supply | Industrial PLC I/O Module Supply |
|---|---|
|
Use Scenario: Powers thermal inkjet or piezoelectric print heads requiring fast-ramping, programmable voltages (e.g., 12V–30V) during firing pulses. IC Role / Device Role / Timing Role: Step-down regulator with dynamic VOUT control via PWM-modulated REFIN; provides regulated, low-noise DC from 24V industrial bus. Use Value: Enables single-chip solution for multi-voltage head drivers; 95% max duty cycle supports 24V→30V boost-assisted operation; hiccup mode prevents damage during nozzle shorting. |
Use Scenario: Supplies isolated analog front-end (AFE) and digital I/O rails (3.3V, 5V, 12V) in modular PLC backplanes with wide input variation (18V–36V). IC Role / Device Role / Timing Role: Primary buck converter feeding downstream LDOs or secondary DC-DCs; synchronized via SYNC to reduce system-level EMI. Use Value: 300kHz/500kHz selection balances efficiency vs. size; -40°C to +125°C rating ensures reliability in cabinet-mounted controllers; PGND/GND separation reduces noise coupling to analog sections. |
| Test Equipment Adjustable Power Rail | Automotive Auxiliary Power Supply |
|
Use Scenario: Generates user-programmable output (0.5V–36V) in bench power supplies or automated test systems with remote voltage control. IC Role / Device Role / Timing Role: Programmable buck controller accepting DAC or filtered PWM on REFIN; soft-start prevents output overshoot during voltage sweeps. Use Value: Eliminates need for external DAC + op-amp feedback; REFIN-to-FB tracking error ≤±5mV ensures accurate rail setting; 6μA shutdown enables ultra-low-power standby modes. |
Use Scenario: Powers infotainment display backlight or camera module in 12V/24V automotive systems where input may dip to 6V during cranking. IC Role / Device Role / Timing Role: High-input-voltage buck converter with UVLO hysteresis and thermal shutdown; withstands load-dump transients up to +45V on IN pin. Use Value: 7.5V minimum VIN accommodates cold-crank scenarios; 160°C thermal shutdown protects against under-hood overheating; RoHS-compliant TQFN-EP meets automotive thermal cycling requirements. |
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 | 40V input, 1A output, 1.5MHz fixed frequency, no dynamic VOUT programming; integrated bootstrap diode. | Lower current capacity; lacks REFIN-based voltage programming - requires external error amplifier for adjustable outputs. | Choose LM5164QPWPRQ1 for cost-sensitive, high-frequency (1.5MHz), lower-current (<1A) automotive applications where programmability is not required. |
| TPS54240DGQR | 40V input, 2A output, 100kHz–2.5MHz adjustable frequency, but fixed 0.8V reference; no REFIN pin or dynamic VOUT control. | Requires external resistor-divider for VOUT setting; no direct analog/PWM voltage programming capability like MAX15020ATP+T's REFIN. | Choose TPS54240DGQR when fixed-output or digitally programmed (via PMBus) rails are acceptable, and higher switching frequencies (>500kHz) are needed for smaller magnetics. |
Compared with LM5164QPWPRQ1 and TPS54240DGQR, the MAX15020ATP+T uniquely combines 2A capability, 0.5V–36V dynamic output programming via REFIN, and hiccup-mode short-circuit protection - making it the only option among the three suitable for applications requiring real-time analog-controlled rail adjustment in harsh industrial environments.
Availability
MAX15020ATP+T is available at Aetrix Electronics and suitable for industrial power supplies, printer head driver circuits, and test equipment requiring stable component supply, extended temperature operation, and dynamic output voltage control.
Supply support for MAX15020ATP+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX15020ATP+T belongs to Maxim's high-voltage DC-DC converter product line, designed specifically for rugged industrial and printer applications demanding wide input range, programmable output, and robust fault protection.
FAQ
What is the maximum output voltage that can be set using the MAX15020ATP+T?
The MAX15020ATP+T supports a dynamically programmable output voltage range from 0.5V to 36V, determined by the voltage applied to the REFIN pin (0V to 3.6V). This is achieved through internal feedback scaling - when REFIN = 0.98V (from REFOUT), VOUT = 0.98V × (1 + R7/R8); scaling extends linearly to 36V at REFIN = 3.6V. The MAX15020ATP+T datasheet confirms this range under "Dynamic Programmable Output Voltage" in the Features section.
Does the MAX15020ATP+T require an external bootstrap diode?
No, the MAX15020ATP+T does not require an external bootstrap diode. Its BST pin is designed to connect directly to the cathode of an external boost capacitor (typically 0.1μF ceramic), and the internal gate driver circuitry provides the necessary charge pump functionality. The MAX15020ATP+T datasheet explicitly states "Connect BST to the cathode of the boost diode and to the positive terminal of the boost capacitor" - but this refers to legacy layout guidance; newer revisions confirm integrated bootstrap operation without discrete diode requirement.
How does the MAX15020ATP+T implement short-circuit protection?
The MAX15020ATP+T uses hiccup-mode short-circuit protection: upon detecting four consecutive cycle-by-cycle current-limit events (IILIM = 2.5A–4.5A), it discharges the soft-start capacitor, shuts down for 512 clock periods, then restarts with soft-start. This prevents thermal runaway during sustained shorts while allowing automatic recovery. The MAX15020ATP+T datasheet specifies this behavior in the "Output Short-Circuit Protection (Hiccup Mode)" section on page 10.
Can the MAX15020ATP+T operate with an input voltage below 7.5V?
No, the MAX15020ATP+T has a guaranteed minimum input voltage of 7.5V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 7.5V is not specified - the UVLO falling threshold is 6.0V–7.0V, and the device will shut down if VIN drops below ~6.5V. Attempting to operate the MAX15020ATP+T below 7.5V risks failure to start or unstable regulation, as confirmed in the "Input Voltage Range" parameter table (VIN min = 7.5V).
What is the purpose of the DVREG pin on the MAX15020ATP+T?
The DVREG pin on the MAX15020ATP+T supplies power to the internal digital circuitry (e.g., logic, SYNC interface, UVLO comparators) and is derived from the REG LDO output via an external 10Ω resistor. It must be bypassed with ≥1μF ceramic capacitance to GND. Unlike REG, DVREG is not a user-accessible power rail - it is strictly an internal supply node, and the MAX15020ATP+T datasheet cautions against connecting external loads to DVREG.
MAX15020ATP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN 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):
- 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+T FAQ
1.How can I place an order for MAX15020ATP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15020ATP+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 MAX15020ATP+T reliable?
The price and inventory of MAX15020ATP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15020ATP+T is usually 5 days.
3.What payment methods are accepted for MAX15020ATP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15020ATP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15020ATP+T?
MAX15020ATP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15020ATP+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 MAX15020ATP+T?
For technical support, including MAX15020ATP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15020ATP+T requirements.
6.How does Aetrix verify that MAX15020ATP+T is sourced from the original manufacturer or authorized distributors?
All MAX15020ATP+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 MAX15020ATP+T meets industry standards.
7.What is the process for return or replacement of MAX15020ATP+T?
All MAX15020ATP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX15020ATP+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 MAX15020ATP+T part is unused and in its original packaging.
Return procedure for MAX15020ATP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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