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Analog Devices Inc./Maxim Integrated MAX17632AATE+T
- Part No.:
- MAX17632AATE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX17632AATE+T.pdf
- Description:
- IC REG 36V 2A HI EFFICIENCY SYNC
- Quantity:
- Payment:
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Inventory:3,785
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Product details
Overview
MAX17632AATE+T from Maxim Integrated is a high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs, delivering up to 2A output current from a 4.5V–36V input range. It features fixed 3.3V output, ±1.2% feedback regulation accuracy over –40°C to +125°C, peak-current-mode control, and operates in PWM/DCM/PFM modes. It is used in industrial control power supplies where compact size, wide input range, and reliable light-load efficiency are critical.
For engineers reviewing the MAX17632AATE+T datasheet, MAX17632AATE+T pinout, MAX17632AATE+T application, or MAX17632AATE+T equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (PWM/DCM/PFM), exact thermal and electrical specifications, and real-world application constraints including hiccup-mode overload protection and prebiased soft-start behavior.
Technical Context
The MAX17632AATE+T implements peak-current-mode control with internal compensation, eliminating external loop components across its fixed 3.3V output range. Its programmable switching frequency (400kHz–2.2MHz via RT resistor) supports EMI optimization and layout flexibility, while the MODE/SYNC pin enables selection among forced PWM, DCM, or PFM operation - each with distinct efficiency trade-offs at light load.
It integrates high-side (125–250mΩ) and low-side (80–160mΩ) nMOSFETs, uses an auxiliary EXTVCC input to reduce LDO losses, and includes built-in features for robust industrial deployment: monotonic startup with prebias support, hiccup-mode overcurrent protection, RESET monitoring with 92–95% FB threshold window, and thermal shutdown at 165°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 36V - supports wide industrial input rails including 12V, 24V, and 36V systems without external pre-regulation. |
| Output Voltage | Fixed 3.3V - factory-trimmed; ±1.2% regulation accuracy over –40°C to +125°C ambient ensures stable logic supply under thermal stress. |
| Max Output Current | 2A continuous - sustained across full temperature range with thermal derating per θJA = 38°C/W on 4-layer board. |
| Switching Frequency | 400kHz to 2.2MHz - adjustable via RT resistor; default 400kHz when RT open; enables EMI spread-spectrum design and small passive sizing. |
| Efficiency Peak | 94% - achieved at mid-load in PWM mode; enhanced light-load efficiency via PFM/DCM modes reduces quiescent current to 50μA (PFM) or 60μA (DCM). |
| Shutdown Current | 2.8μA - ultra-low IIN-SH enables battery-backed or always-on systems with minimal standby drain. |
| Operating Temp Range | –40°C to +125°C ambient - qualified for industrial environments; junction limit +150°C supports high-power density layouts. |
Pinout & Package
MAX17632AATE+T is housed in a 16-pin, 3mm × 3mm TQFN package (package code T1633+5C) with exposed pad for thermal dissipation. Pin numbering follows standard JEDEC outline 21-0136; land pattern 90-0032 applies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN/UVLO | Enable / Input UVLO Threshold Input | Active-high enable; rising threshold 1.215V (±2.5%), falling 1.09V; supports resistor-divider biasing for programmable turn-on voltage. |
| 2 VCC | Internal 5V LDO Output | Supplies internal circuitry; requires 2.2μF ceramic bypass to SGND; not intended for external loading. |
| 3 SGND | Analog Ground Reference | Separate analog ground node; must be connected to PGND at single point near device to minimize noise coupling. |
| 4 MODE/SYNC | Mode Selection / External Clock Sync Input | Configures PWM (SGND), DCM (VCC), or PFM (open); also accepts external clock (1.1–1.4× fSW) for synchronization. |
| 5 SS | Soft-Start Timing Input | Connects to SGND via capacitor; 5μA charging current sets monotonic ramp time; supports prebiased output startup. |
| 6 FB | Feedback Input | Monitors regulated 3.3V output directly; internal reference 3.3V ±1.2%; RESET assertion triggered if FB falls below 92% of setpoint. |
| 7 RT | Frequency Programming Input | Resistor-to-SGND sets fSW: 50.8kΩ → 400kHz, 40.2kΩ → 500kHz, 8.06kΩ → 2.2MHz; open → default 400kHz. |
| 8 RESET | Open-Drain Power-Good Output | Asserts low when FB < 92% of regulation; deasserts 1024 switching cycles after FB > 95%; requires external pull-up. |
| 9 EXTVCC | Auxiliary Supply Input | Accepts 4.56–4.84V input to power internal circuitry, reducing VCC LDO losses and improving efficiency at high VIN. |
| 10–12 PGND | Power Ground Terminals | Three dedicated pins for high-current return path; must be tied to SGND at single point near EXPOSED PAD. |
| 13 LX | Switch Node | Connects to external inductor; handles ±3.5A RMS current; requires low-inductance layout to minimize ringing and EMI. |
| 14 BST | Bootstrap Capacitor Connection | Connects to LX via 0.1μF ceramic capacitor; supplies gate drive for high-side MOSFET; max BST-to-LX = +6.5V. |
| 15 VIN | Main Input Supply | Primary power input (4.5–36V); requires local 22μF ceramic bulk capacitance; absolute max = +40V. |
| 16 EP | Exposed Thermal Pad | Internally connected to PGND; must be soldered to PCB thermal plane for θJA = 38°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode; reduces conduction loss and improves efficiency by ~3–5% vs. asynchronous designs. |
| Internal compensation | Removes need for external Type-II/III compensation network; simplifies design and reduces BOM count for fixed-output variants. |
| Programmable frequency & sync | RT resistor sets fSW from 400kHz–2.2MHz; MODE/SYNC pin accepts external clock for multi-rail synchronization. |
| Hiccup-mode OCP | Enters safe restart cycle upon overcurrent; prevents thermal runaway during sustained short-circuit or overload conditions. |
| Prebiased soft-start | Supports startup into precharged output (e.g., hot-swap or backup rail); avoids reverse current flow and output collapse. |
| RESET with voltage window | Asserts when FB drops below 92% of regulation; releases only after FB exceeds 95% for 1024 cycles - prevents chatter near threshold. |
Applications
| Industrial Control Power Supplies | General-Purpose Point-of-Load |
|---|---|
|
Use Scenario: Powering PLC I/O modules, sensor interfaces, and fieldbus transceivers in harsh factory environments with 24V nominal bus. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying microcontroller, FPGA I/O banks, and isolated communication ICs. Use Value: Wide 4.5–36V input accommodates brownout and surge conditions; -40°C to +125°C rating ensures reliability in uncooled enclosures. |
Use Scenario: Local regulation for FPGA core or memory subsystems requiring clean, tightly regulated 3.3V at ≤2A. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC-DC converter placed adjacent to load to minimize IR drop and EMI. Use Value: 94% peak efficiency and PFM mode reduce heat generation; all-ceramic capacitor compatibility enables compact, low-profile layout. |
| Distributed Supply Regulation | Base Station Power Supplies |
|
Use Scenario: Secondary regulation stage in telecom or networking equipment distributing 3.3V from intermediate 12V/48V bus. IC Role / Device Role / Timing Role: Isolated or non-isolated POL converter providing stable 3.3V to RF front-end ICs and data converters. Use Value: Programmable frequency avoids beat frequencies with system clocks; SYNC capability enables deterministic timing across multiple rails. |
Use Scenario: Powering baseband processing units and fronthaul interface ICs in 4G/5G macrocell and small-cell radios. IC Role / Device Role / Timing Role: High-reliability 3.3V supply with hiccup OCP and RESET monitoring for fault-tolerant system management. Use Value: RESET output feeds system watchdog or FPGA configuration logic; thermal shutdown protects against airflow failure in sealed enclosures. |
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), 4.5–65V input, 1.5A output, fixed 3.3V option available; no internal compensation - requires external RC network. | Targeted at automotive infotainment and ADAS; lacks EXTVCC and prebias soft-start; RESET function not integrated. | Select LM5164QDDARQ1 only when AEC-Q100 qualification is mandatory and external compensation is acceptable. |
| TPS54202DRCT | 2.5–6V input, 2A output, fixed 3.3V; integrated FETs but narrower input range; no hiccup OCP - latches off on overcurrent. | Designed for low-voltage systems (e.g., USB-powered devices); unsuitable for industrial 24V inputs due to VIN limit. | Choose TPS54202DRCT only for cost-sensitive, low-input-voltage applications where hiccup protection is not required. |
Compared with LM5164QDDARQ1 and TPS54202DRCT, the MAX17632AATE+T uniquely combines industrial temperature range, internal compensation, hiccup-mode OCP, and prebiased soft-start in a 3.3V fixed-output 2A buck - making it optimal for ruggedized, thermally constrained, and fault-aware designs.
Availability
MAX17632AATE+T is available at Aetrix Electronics and suitable for industrial control power supplies, general-purpose point-of-load regulation, and distributed supply regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX17632AATE+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 MAX17632 family targets high-voltage industrial DC-DC conversion, emphasizing wide input range, integrated FETs, robust protection, and simplified design - specifically for space-constrained, thermally demanding applications.
FAQ
What is the output voltage tolerance of the MAX17632AATE+T over temperature?
The MAX17632AATE+T maintains ±1.2% feedback regulation accuracy over the full –40°C to +125°C ambient operating temperature range. This is specified for the fixed 3.3V output variant and confirmed across production testing and characterization - ensuring consistent 3.3V rail stability in uncontrolled thermal environments where the MAX17632AATE+T is deployed.
Can the MAX17632AATE+T operate with a prebiased output during startup?
Yes, the MAX17632AATE+T supports monotonic startup into a precharged output. Its soft-start circuitry (SS pin) and valley-current-limit architecture prevent reverse current flow and output collapse when enabled into an existing 3.3V rail - a key requirement in hot-swap and redundant power systems using the MAX17632AATE+T.
What is the minimum on-time specification for the MAX17632AATE+T, and why does it matter?
The MAX17632AATE+T has a guaranteed minimum on-time of 52ns (typical 80ns). This enables high-frequency operation (up to 2.2MHz) and supports high VIN-to-VOUT ratios - for example, stepping 36V down to 3.3V at 2MHz - without pulse-skipping instability, which is essential for compact filter design and EMI control in the MAX17632AATE+T's target applications.
How does the RESET function of the MAX17632AATE+T behave during undervoltage events?
The MAX17632AATE+T asserts its open-drain RESET output low when FB falls below 92% of its 3.3V setpoint (i.e., <3.036V), and releases it only after FB rises above 95% (≥3.135V) and remains there for exactly 1024 switching cycles. This hysteresis and delay prevent false resets during transient dips - a behavior rigorously defined in the MAX17632AATE+T's electrical characteristics table.
Is external compensation required for the MAX17632AATE+T in fixed 3.3V configuration?
No. The MAX17632AATE+T includes fully integrated compensation circuitry optimized for its fixed 3.3V output variants. No external Type-II or Type-III compensation components are needed - a key differentiator from adjustable regulators like the MAX17632C - reducing BOM count and layout complexity in designs using the MAX17632AATE+T.
MAX17632AATE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX17632AATE+T FAQ
1.How can I place an order for MAX17632AATE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17632AATE+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 MAX17632AATE+T reliable?
The price and inventory of MAX17632AATE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17632AATE+T is usually 5 days.
3.What payment methods are accepted for MAX17632AATE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17632AATE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17632AATE+T?
MAX17632AATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17632AATE+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 MAX17632AATE+T?
For technical support, including MAX17632AATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17632AATE+T requirements.
6.How does Aetrix verify that MAX17632AATE+T is sourced from the original manufacturer or authorized distributors?
All MAX17632AATE+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 MAX17632AATE+T meets industry standards.
7.What is the process for return or replacement of MAX17632AATE+T?
All MAX17632AATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17632AATE+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 MAX17632AATE+T part is unused and in its original packaging.
Return procedure for MAX17632AATE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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