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Analog Devices Inc./Maxim Integrated MAX17632CATE+
- Part No.:
- MAX17632CATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX17632CATE+.pdf
- Description:
- IC REG BUCK ADJ 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,873
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Product details
Overview
MAX17632CATE+ from Maxim Integrated is a high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs, operating from 4.5V to 36V input and delivering up to 2A output current. It features adjustable output voltage (0.9V to 90% of VIN), peak-current-mode control, and supports PWM/DCM/PFM modes for optimized efficiency across load conditions. Designed for industrial point-of-load regulation in high-voltage single-board systems.
For engineers reviewing the MAX17632CATE+ datasheet, MAX17632CATE+ pinout, MAX17632CATE+ application, or MAX17632CATE+ equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world application guidance for reliable power design in harsh environments.
Technical Context
The MAX17632CATE+ implements peak-current-mode control with programmable switching frequency (400kHz–2.2MHz via RT resistor or external clock sync), enabling precise loop response tuning and EMI mitigation. Its internal compensation eliminates external compensation components across the full output-voltage range.
It integrates high-side (125–250mΩ) and low-side (80–160mΩ) nMOSFETs, supports prebiased soft-start, hiccup-mode overload protection, and features an auxiliary EXTVCC input to improve efficiency by reducing LDO losses. The device operates over –40°C to +125°C ambient temperature with ±1.2% FB regulation accuracy.
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 bus systems without pre-regulation. |
| Output Current | Up to 2A continuous - sufficient for powering FPGAs, microcontrollers, and analog subsystems in compact designs. |
| Output Voltage Range | Adjustable from 0.9V to 90% of VIN - enables flexible rail generation (e.g., 1.2V, 1.8V, 3.3V, 5V) using external resistor divider on FB. |
| Switching Frequency | 400kHz to 2.2MHz - selectable via RT resistor or external SYNC signal; higher frequencies allow smaller inductors and reduced solution size. |
| Feedback Accuracy | ±1.2% over –40°C to +125°C - ensures stable output regulation under extreme thermal stress in industrial deployments. |
| Peak Efficiency | 94% - achieved in PWM mode at full load; PFM/DCM modes maintain >85% efficiency down to 20mA load. |
| Shutdown Current | 2.8μA - enables ultra-low-power standby in battery-backed or energy-sensitive systems. |
Pinout & Package
The MAX17632CATE+ is housed in a 16-pin, 3mm × 3mm TQFN package with exposed pad (package code T1633+5C), optimized for thermal performance (θJA = 38°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN/UVLO | Enable / Input UVLO threshold control | Configurable turn-on voltage (1.19–1.26V rising); connects to resistor divider from VIN to set input undervoltage lockout point. |
| 2 VCC | Internal 5V LDO output | Bypassed with 2.2μF ceramic capacitor; powers internal circuitry; not intended for external loading. |
| 3 SGND | Analog ground reference | Separate from PGND to minimize noise coupling into feedback and control loops. |
| 4 MODE/SYNC | Operating mode selection / clock synchronization | Open = PFM; SGND = forced PWM; VCC = DCM; also accepts external clock (1.1–1.4× fSW) for system-level timing alignment. |
| 5 SS | Soft-start timing control | Capacitor from SS to SGND sets monotonic startup time; supports prebiased output startup without reverse current. |
| 6 FB | Feedback voltage sensing | Connects to center of external resistor divider for adjustable output; regulated to 0.9V ±1.2% (MAX17632C-specific). |
| 7 RT | Switching frequency programming | Resistor to SGND sets fSW (e.g., 50.8kΩ → 400kHz); open = default 400kHz; supports external clock sync. |
| 8 RESET | Open-drain power-good monitor | Asserts low when FB falls below 92% of target; deasserts after 1024 cycles once FB rises above 95% - enables system reset sequencing. |
| 9 EXTVCC | Auxiliary supply input | Accepts buck output voltage (4.56–4.84V threshold) to power internal circuitry, reducing VCC LDO losses and improving efficiency. |
| 10 PGND | Power ground return | High-current return path for LX switch node; must be connected to SGND only at single point to avoid ground bounce. |
| 11 VOUT | Regulated output voltage | Delivers up to 2A; requires external LC filter (e.g., 10µH inductor + 22µF ceramic output cap) per typical application. |
| 12 LX | Switch node | Connects to inductor; carries high di/dt switching current; layout critical for EMI and efficiency. |
| 13 BST | Bootstrap supply for high-side gate driver | Requires 0.1µF ceramic capacitor between BST and LX; enables efficient high-side nMOS drive without external charge pump. |
| 14 VIN | Main input power supply | Accepts 4.5V–36V; requires local 2.2µF ceramic bypass capacitor near pin to suppress high-frequency ripple. |
| 15 EP | Exposed thermal pad | Must be soldered to PCB thermal plane for optimal heat dissipation; electrically tied to PGND internally. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and board area; enables >94% peak efficiency. |
| Integrated compensation | Removes need for external Type-II/III compensation network - simplifies design and improves stability across all output voltages. |
| Programmable frequency & sync | RT pin and MODE/SYNC dual functionality allow EMI spread-spectrum tuning or multi-rail synchronization without extra ICs. |
| Hiccup-mode OCP | Shuts down and auto-retries during sustained overload (e.g., short-circuit), protecting MOSFETs and downstream loads. |
| Prebiased soft-start | Enables safe startup into precharged outputs without reverse current flow - critical for hot-swap and redundant power systems. |
| Industrial temperature range | Guaranteed operation from –40°C to +125°C ambient, with junction limit of +150°C - suitable for uncooled enclosures and outdoor equipment. |
Applications
| Industrial Control Power Supplies | General-Purpose Point-of-Load |
|---|---|
Use Scenario: Powering PLC I/O modules, motor drivers, and sensor interfaces in factory automation cabinets with 24V DC bus. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 24V bus to 3.3V/5V logic rails with tight line/load regulation. Use Value: ±1.2% output accuracy and hiccup OCP ensure reliable operation despite bus voltage sag and transient overloads. |
Use Scenario: Generating clean 1.2V core voltage for FPGA or SoC on high-density embedded boards. IC Role / Device Role / Timing Role: Adjustable-output buck converter with programmable frequency to avoid sensitive frequency bands in mixed-signal systems. Use Value: 2.2MHz max switching frequency enables use of small 4.7µH inductors, reducing footprint while maintaining >90% light-load efficiency in PFM mode. |
| Distributed Supply Regulation | Base Station Power Supplies |
Use Scenario: Local regulation of 12V intermediate bus to 5V/3.3V rails across multiple PCBs in telecom rack systems. IC Role / Device Role / Timing Role: Synchronized buck converter locked to system clock via MODE/SYNC pin to minimize beat frequencies and conducted EMI. Use Value: External clock sync capability allows deterministic switching edge alignment across dozens of regulators, easing EMI compliance testing. |
Use Scenario: Powering RF front-end ICs and digital baseband processors in 4G/5G remote radio units exposed to outdoor thermal cycling. IC Role / Device Role / Timing Role: High-efficiency, thermally robust buck regulator delivering 2A at 5V from 28V intermediate bus. Use Value: 38°C/W θJA and -40°C to +125°C rating enable operation without heatsinks in sealed, fanless 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 |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 1A output, fixed 3.3V/5V options only; no adjustable output version; requires external compensation. | Automotive AEC-Q100 qualified; lacks EXTVCC and prebiased soft-start; lower current rating limits use in 2A PoL roles. | Select LM5164QPWPRQ1 only for automotive-grade 1A applications requiring extended input range beyond 36V. |
| TPS54202DDCR | 4.5V–28V input, 2A output, adjustable output; no EXTVCC; 500kHz fixed frequency; requires external compensation. | Lacks hiccup OCP, PFM/DCM modes, and industrial temp grade; rated only to +105°C ambient. | Choose TPS54202DDCR for cost-sensitive consumer applications where 28V max input and +105°C operation suffice. |
Compared with LM5164QPWPRQ1 and TPS54202DDCR, the MAX17632CATE+ uniquely combines 2A output, 36V max input, adjustable output, internal compensation, EXTVCC efficiency boost, and full industrial temperature support - making it the only option meeting all four requirements simultaneously.
Availability
MAX17632CATE+ is available at Aetrix Electronics and suitable for industrial control power supplies, distributed supply regulation, and base station power supplies requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX17632CATE+ 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 MAX17632 series was designed specifically for rugged, high-efficiency DC-DC conversion in industrial and telecom infrastructure, emphasizing wide input range, integrated MOSFETs, and robust protection features for unattended operation.
FAQ
What is the output voltage adjustment range for the MAX17632CATE+?
The MAX17632CATE+ supports an adjustable output voltage from 0.9V up to 90% of the input voltage (VIN). This is achieved using an external resistor divider connected to the FB pin, with the internal reference voltage fixed at 0.9V ±1.2%. For example, with VIN = 24V, the maximum output is 21.6V; with VIN = 12V, it is 10.8V. The MAX17632CATE+ does not support fixed-output variants - only the adjustable configuration.
Does the MAX17632CATE+ require external compensation components?
No, the MAX17632CATE+ features built-in compensation across its entire output-voltage range. Unlike many buck controllers, it does not require external Type-II or Type-III compensation networks. This simplifies design, reduces BOM count, and improves stability consistency regardless of output voltage setting or output capacitor ESR variation - a key advantage confirmed in the device's Electrical Characteristics table and Typical Application Circuit.
How does the EXTVCC pin improve efficiency in the MAX17632CATE+?
The EXTVCC pin on the MAX17632CATE+ accepts an external supply (typically the buck output) to power the internal control circuitry, bypassing the internal 5V LDO. When enabled (rising threshold 4.56–4.84V), it reduces LDO conduction loss - especially beneficial at high input voltages (e.g., 24V–36V) where LDO dropout would otherwise dissipate significant power. This feature directly contributes to the MAX17632CATE+'s 94% peak efficiency and lower thermal load.
Can the MAX17632CATE+ operate with a prebiased output during startup?
Yes, the MAX17632CATE+ supports monotonic startup into a prebiased output voltage. When the SS pin is used with appropriate capacitance, the device ramps the output from 0V even if the output rail is already charged - preventing reverse current flow through the output capacitor or downstream loads. This behavior is explicitly characterized in Figures toc22, toc23, and toc24 of the datasheet and is essential for hot-swap and redundant power architectures.
What protection features are integrated into the MAX17632CATE+?
The MAX17632CATE+ integrates hiccup-mode overload protection, overtemperature shutdown (165°C trip with 10°C hysteresis), programmable EN/UVLO, built-in output-voltage monitoring with open-drain RESET assertion, and valley current limiting. These protections operate independently of external components and are guaranteed over the full –40°C to +125°C ambient range - ensuring fail-safe behavior in industrial environments where reliability is mission-critical.
MAX17632CATE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN 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):
- 36V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 32.4V
- Current - Output:
- 2A
- Frequency - Switching:
- 400kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
MAX17632CATE+ FAQ
1.How can I place an order for MAX17632CATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17632CATE+ 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 MAX17632CATE+ reliable?
The price and inventory of MAX17632CATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17632CATE+ is usually 5 days.
3.What payment methods are accepted for MAX17632CATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17632CATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17632CATE+?
MAX17632CATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17632CATE+ 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 MAX17632CATE+?
For technical support, including MAX17632CATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17632CATE+ requirements.
6.How does Aetrix verify that MAX17632CATE+ is sourced from the original manufacturer or authorized distributors?
All MAX17632CATE+ 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 MAX17632CATE+ meets industry standards.
7.What is the process for return or replacement of MAX17632CATE+?
All MAX17632CATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17632CATE+, 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 MAX17632CATE+ part is unused and in its original packaging.
Return procedure for MAX17632CATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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