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Analog Devices Inc./Maxim Integrated MAX17536ATP+
- Part No.:
- MAX17536ATP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX17536ATP+.pdf
- Description:
- IC REG BUCK ADJ 4A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,162
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Product details
Overview
The MAX17536ATP+ from Maxim Integrated is a high-efficiency, synchronous step-down DC-DC converter with integrated high-side MOSFET, operating from 4.5V to 60V input and delivering up to 4A output current. It supports adjustable output voltages from 0.9V to 90% of VIN, features ±1.4% FB regulation accuracy over –40°C to +125°C, and uses peak current-mode control with selectable PWM/PFM/DCM modes. It is widely used in industrial power supplies and high-voltage single-board systems.
For engineers reviewing the MAX17536ATP+ datasheet, MAX17536ATP+ pinout, MAX17536ATP+ application, or MAX17536ATP+ equivalent, key selection criteria include input voltage range (4.5–60V), output current capability (4A), switching frequency programmability (100kHz–2.2MHz), internal compensation, and robust protection features including hiccup-mode overload and DL-to-LX short detection.
Technical Context
The MAX17536ATP+ implements a peak current-mode control architecture with an internal transconductance error amplifier, slope compensation generator, and high-side current-sense amplifier. Its MODE/SYNC pin enables dynamic selection among constant-frequency PWM, pulse-skipping PFM, and discontinuous-conduction DCM operation - each optimized for efficiency vs. noise trade-offs across load conditions.
It integrates dual LDOs (VIN-fed and EXTVCC-fed) with automatic switchover at ~4.7V, enabling >95% peak efficiency and ultra-low 3.5µA shutdown current. The device includes monotonic startup into prebiased loads, built-in soft-start via external capacitor on SS, and RESET assertion based on precise FB voltage monitoring (92.5% trip, 95.5% release).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and telecom input rails without external pre-regulation. |
| Output Current | Up to 4A continuous - sufficient for point-of-load regulation in FPGA, DSP, and ASIC power domains. |
| Feedback Accuracy | ±1.4% over –40°C to +125°C - ensures stable output voltage under extreme ambient conditions. |
| Switching Frequency | 100kHz to 2.2MHz (adjustable via RT resistor) - enables optimization of size, EMI, and efficiency. |
| Peak Efficiency | >95% - achieved using synchronous rectification and auxiliary bootstrap LDO for gate drive. |
| Shutdown Current | 3.5µA - minimizes system standby power in battery-backed or energy-sensitive applications. |
| Operating Temp | –40°C to +125°C ambient / +150°C junction - qualified for harsh industrial and base-station environments. |
Pinout & Package
The MAX17536ATP+ is housed in a 20-pin, 5mm × 5mm thin QFN (TQFN-EP) package with exposed pad for thermal dissipation. Pin layout follows standard buck controller conventions with dedicated VIN, LX, PGND, SGND, BST, and DL terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2,14,15) | Power input supply | High-current input node; requires local 2×2.2µF ceramic decoupling to PGND for stability and EMI suppression. |
| PGND (Pin 3) | Power ground return | Low-impedance path for high di/dt currents; must be connected directly to power ground plane with minimal trace length. |
| VCC (Pin 4) | Internal 5V LDO output | Powers internal logic and low-side driver; bypassed with 2.2µF ceramic capacitor to SGND. |
| MODE/SYNC (Pin 5) | Control mode selection & sync input | Selects PWM/PGM/DCM operation or accepts external clock (1.1–1.4× fSW) for EMI reduction. |
| RESET (Pin 6) | Open-drain fault indicator | Asserts low when FB drops below 92.5% of setpoint; deasserts after 1024 cycles once FB rises above 95.5%. |
| RT (Pin 7) | Frequency programming input | Resistor-to-SGND sets fSW from 100kHz to 2.2MHz; open = 450kHz default. |
| SGND (Pin 8) | Analog reference ground | Reference for FB, CF, SS, EN/UVLO; must be star-connected to PGND at VCC bypass cap. |
| CF (Pin 9) | Compensation network node | Connects to FB for loop compensation at fSW < 450kHz; left open otherwise. |
| FB (Pin 10) | Output voltage feedback | Monitors resistive divider output; regulates VOUT with ±1.4% accuracy across temperature. |
| EXTVCC (Pin 11) | External LDO input | Accepts 4.84–24V to power VCC from output rail, improving efficiency at high VIN. |
| SS (Pin 12) | Soft-start timing input | Capacitor-to-SGND sets ramp time; enables monotonic startup into prebiased loads. |
| EN/UVLO (Pin 13) | Enable & input UVLO threshold | Rising threshold 1.215V ±25mV; configurable via resistor divider for custom turn-on voltage. |
| BST (Pin 16) | Bootstrap capacitor node | Connects 0.1µF ceramic cap to LX; sustains high-side gate drive during continuous conduction. |
| LX (Pins 17–19) | Switching node | Connects to inductor switch node; carries high di/dt; requires tight layout and Kelvin connection. |
| DL (Pin 20) | Low-side gate driver output | Drives external nMOSFET gate; resistor value selects current-limit thresholds and hiccup behavior. |
Key Features
| Feature | Design Value |
|---|---|
| No Schottky required | Synchronous rectification eliminates body-diode conduction loss and improves light-load efficiency. |
| Internal compensation | Eliminates need for external Type-II/III compensation network across full output voltage range. |
| All-ceramic capacitor support | Enables compact, low-profile PCB layout without electrolytic or tantalum capacitors. |
| Programmable EN/UVLO | Configurable input undervoltage lockout prevents erratic startup during brownout conditions. |
| DL-to-LX short detection | Hardware-level protection against low-side FET failure or PCB short, triggering hiccup mode. |
| Monotonic startup | Guarantees controlled VOUT ramp even when output is precharged, avoiding reverse current stress. |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
Use Scenario: Central 48V rail powering multiple isolated or non-isolated DC-DC stages in factory automation controllers. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering 5V/4A or 3.3V/4A to downstream converters and logic. Use Value: Wide 4.5–60V input handles 36–57V telecom range and transient surges; 95%+ efficiency reduces thermal load in enclosed cabinets. | Use Scenario: Local regulation on large PCBs where centralized 12V or 24V bus feeds multiple subsystems. IC Role / Device Role / Timing Role: Point-of-load (POL) converter placed near FPGA, ADC, or communication ICs to minimize IR drop and noise. Use Value: Internal compensation and all-ceramic support enable small footprint; PFM/DCM modes maintain >85% efficiency down to 1mA load. |
| Base-Station Power Supplies | Wall Transformer Regulation |
Use Scenario: Intermediate 5V/3.3V generation in macro/micro base station RF units operating in outdoor enclosures. IC Role / Device Role / Timing Role: High-reliability buck stage converting 48V backplane to processor and transceiver supply rails. Use Value: –40°C to +125°C ambient rating and overtemperature shutdown ensure operation in uncooled outdoor cabinets. | Use Scenario: Replacement for linear regulators or legacy flyback designs in AC/DC adapters feeding IoT gateways or smart home hubs. IC Role / Device Role / Timing Role: Efficient 5V/4A secondary-side regulator accepting rectified DC from transformer secondary. Use Value: 3.5µA shutdown current extends battery backup time; RESET output enables system-level power sequencing and fault reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5–65V input, 3.5A max, no internal high-side FET (external), fixed 100kHz–2.2MHz freq, AEC-Q100 qualified | Automotive-grade; requires external high-side MOSFET and compensation network | Choose LM5164QPWPRQ1 only if automotive qualification and external FET flexibility are required; not drop-in compatible. |
| TPS544B20RHLT | 4.5–18V input, 4A, integrated FETs, 500kHz–2MHz, PMBus interface, lower VIN range | Requires digital interface and narrow input range; lacks 60V capability and hiccup-mode protection | Choose TPS544B20RHLT only for digitally managed 12V systems needing telemetry; unsuitable for 48V industrial inputs. |
Compared with LM5164QPWPRQ1 and TPS544B20RHLT, the MAX17536ATP+ uniquely combines 60V input tolerance, internal high-side FET, hiccup-mode overload protection, and seamless EXTVCC/VIN LDO switchover - making it optimal for ruggedized industrial and telecom POL applications where reliability and design simplicity are critical.
Availability
The MAX17536ATP+ is available at Aetrix Electronics and suitable for industrial power supplies, distributed supply regulation, and base-station power supplies requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX17536ATP+ 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 computing markets.
The MAX17536ATP+ belongs to Maxim's high-voltage synchronous buck converter product line, designed specifically for reliable, efficient, and compact DC-DC conversion in harsh industrial environments with wide input ranges and stringent thermal constraints.
FAQ
What is the maximum output current supported by the MAX17536ATP+?
The MAX17536ATP+ delivers up to 4A of continuous output current under typical thermal conditions (TA ≤ +70°C, multilayer board). Its peak current limit is programmable between 4.05A and 7.55A depending on the DL resistor value, and it includes hiccup-mode overload protection to sustain indefinite short-circuit events without damage. Derating applies above +70°C ambient per its 33.3mW/°C thermal coefficient.
How does the MODE/SYNC pin configure operation modes on the MAX17536ATP+?
The MODE/SYNC pin on the MAX17536ATP+ latches at power-up to select control scheme: grounded = constant-frequency PWM; open = PFM (pulse skipping at light loads); tied to VCC = DCM (discontinuous conduction). It also accepts external synchronization signals between 1.1× and 1.4× the programmed fSW. Mode changes are ignored during normal operation - only effective at startup.
Can the MAX17536ATP+ operate with an external 5V supply applied to EXTVCC?
Yes - the MAX17536ATP+ supports EXTVCC operation between 4.84V and 24V. When EXTVCC exceeds ~4.7V, the internal LDO automatically switches to draw power from the output rail instead of VIN, reducing power dissipation and improving overall efficiency - especially beneficial at high input voltages like 48V. A 4.7Ω series resistor and 0.1µF bypass capacitor are required per the datasheet.
What protection features are integrated into the MAX17536ATP+?
The MAX17536ATP+ integrates multiple hardware-based protections: hiccup-mode overload (with programmable peak/runaway current limits), DL-to-LX short detection, overtemperature shutdown (165°C, 10°C hysteresis), RESET-based output voltage monitoring (92.5% trip, 95.5% release), and monotonic startup into prebiased loads. These features eliminate need for external supervision circuits in mission-critical industrial designs.
Is the MAX17536ATP+ pin-compatible with other devices in the MAX175xx family?
No - the MAX17536ATP+ uses a unique 20-pin TQFN package and pinout optimized for its specific feature set (e.g., EXTVCC, DL driver, dual LDO architecture). While functionally related to MAX17524/MAX17532, it is not pin-compatible due to differing pin assignments, number of LX pins, and absence of certain signals (e.g., no PG pin). Layout reuse requires full schematic and footprint validation.
MAX17536ATP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tray
- 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):
- 54V
- Current - Output:
- 4A
- Frequency - Switching:
- 100kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX17536ATP+ FAQ
1.How can I place an order for MAX17536ATP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17536ATP+ 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 MAX17536ATP+ reliable?
The price and inventory of MAX17536ATP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17536ATP+ is usually 5 days.
3.What payment methods are accepted for MAX17536ATP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17536ATP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17536ATP+?
MAX17536ATP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17536ATP+ 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 MAX17536ATP+?
For technical support, including MAX17536ATP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17536ATP+ requirements.
6.How does Aetrix verify that MAX17536ATP+ is sourced from the original manufacturer or authorized distributors?
All MAX17536ATP+ 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 MAX17536ATP+ meets industry standards.
7.What is the process for return or replacement of MAX17536ATP+?
All MAX17536ATP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17536ATP+, 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 MAX17536ATP+ part is unused and in its original packaging.
Return procedure for MAX17536ATP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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