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Analog Devices Inc./Maxim Integrated MAX17632BATE+
- Part No.:
- MAX17632BATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX17632BATE+.pdf
- Description:
- IC REG BUCK 5V 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:430
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Product details
Overview
MAX17632BATE+ from Maxim Integrated is a high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs, delivering up to 2A at a fixed 5V output across 4.5V–36V input. It features peak-current-mode control, ±1.2% feedback regulation accuracy over –40°C to +125°C, and operates in PWM/DCM/PFM modes for optimized efficiency across load conditions. It is used in industrial control power supplies and high-voltage single-board systems.
For engineers reviewing the MAX17632BATE+ datasheet, MAX17632BATE+ pinout, MAX17632BATE+ application, or MAX17632BATE+ equivalent, key selection considerations include its fixed 5V output, 16-pin 3mm × 3mm TQFN package, 400kHz–2.2MHz programmable switching frequency, hiccup-mode overload protection, and built-in RESET with voltage monitoring.
Technical Context
The MAX17632BATE+ implements peak-current-mode control with selectable operation modes via the MODE/SYNC pin: forced PWM (SGND), DCM (VCC), or PFM (open). Its internal compensation eliminates external loop components across the full output range. The device supports external clock synchronization and features a low minimum on-time (52ns) enabling high-frequency, compact designs.
It integrates high-side (125–250mΩ) and low-side (80–160mΩ) nMOSFETs, includes an auxiliary EXTVCC input to improve efficiency, and provides monotonic startup with prebiased output support. Built-in protections include hiccup-mode overcurrent, thermal shutdown (165°C), and output voltage monitoring with RESET assertion at 92% VFB and deassertion at 95% VFB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1.2% over –40°C to +125°C - ensures stable rail for microcontrollers and FPGAs without external feedback resistors. |
| Input Voltage Range | 4.5V to 36V - supports wide industrial input sources including 12V, 24V, and 36V bus systems. |
| Max Output Current | 2A continuous - sufficient for powering SoCs, sensors, and interface ICs in point-of-load applications. |
| Switching Frequency | 400kHz to 2.2MHz (programmable via RT resistor) - enables optimization of size vs. EMI; default 400kHz when RT open. |
| Efficiency Peak | 94% at full load - reduces thermal stress and improves system-level power density in space-constrained designs. |
| Shutdown Current | 2.8μA - enables ultra-low-power standby in battery-backed or energy-sensitive systems. |
| Package | 16-pin TQFN (3mm × 3mm, 0.5mm pitch) - surface-mount, thermally enhanced footprint compatible with standard reflow profiles. |
Pinout & Package
The MAX17632BATE+ is housed in a 16-pin, 3mm × 3mm, 0.5mm-pitch TQFN package with exposed pad (EP) for thermal dissipation. Pin 1 is marked by a dot; the exposed pad must be soldered to a thermal plane for optimal junction-to-board thermal resistance (θJC = 10°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN/UVLO | Enable / Input Undervoltage Lockout | Active-high enable; rising threshold 1.215V - allows precise turn-on voltage setting via resistor divider from VIN. |
| 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 | Low-noise ground return for FB, SS, MODE/SYNC, and RESET - must be separated from PGND in layout. |
| 4 MODE/SYNC | Mode Selection / Clock Sync Input | Configures PWM (SGND), DCM (VCC), or PFM (open); accepts external sync clock up to 1.4× fSW. |
| 5 SS | Soft-Start Timing Input | Connects to SGND via capacitor (e.g., 5600pF) to set monotonic startup time and prevent inrush current. |
| 6 FB | Feedback Input | Direct connection to VOUT for fixed 5V output - regulates with ±1.2% accuracy; internal reference is 5.0V. |
| 7 RT | Frequency Programming Input | Resistor-to-SGND sets fSW from 400kHz (open) to 2.2MHz - enables EMI tuning and inductor size reduction. |
| 8 RESET | Open-Drain Power-Good Output | Asserts low when VOUT drops below 92% of 5V (4.6V); releases after 1024 cycles once VOUT rises above 4.75V. |
| 9 EXTVCC | External Auxiliary Supply Input | Accepts 4.56–4.84V input - powers internal LDO to reduce losses when VOUT ≥ 4.75V, improving efficiency. |
| 10 PGND | Power Ground | High-current return path for LX switch node - must be connected to SGND only at single point near EP. |
| 11 LX | Switch Node | Connects to inductor; handles ±3.5A RMS current - requires low-inductance layout and proper snubbing. |
| 12 BST | Bootstrap Capacitor Connection | Connects to 0.1μF ceramic capacitor between BST and LX - sustains high-side gate drive during 100% duty cycle. |
| 13 VIN | Main Input Supply | Accepts 4.5V–36V; absolute max 40V - decoupled with 2.2μF ceramic near pin; supports reverse polarity protection. |
| 14 VOUT | Regulated Output | Delivers fixed 5.0V @ up to 2A - requires 22μF X7R ceramic output capacitor (1210) for stability and ripple suppression. |
| 15 EP | Exposed Thermal Pad | Internally connected to PGND - must be soldered to PCB thermal plane for θJA = 38°C/W (4-layer board). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces conduction loss and improves light-load efficiency in PFM/DCM modes. |
| Integrated compensation | No external Type-II/III compensation network required - simplifies design and improves production yield across temperature. |
| Programmable switching frequency | 400kHz–2.2MHz via single RT resistor - enables EMI compliance and smaller magnetics without changing layout. |
| Hiccup-mode overcurrent protection | Auto-retry shutdown on sustained overload - protects MOSFETs and inductor during short-circuit or excessive load. |
| Prebiased soft-start | Supports startup into precharged output - prevents reverse current flow and ensures monotonic VOUT ramp under all conditions. |
| RESET with voltage monitoring | Open-drain output asserts when VOUT falls below 4.6V and releases after 1024 cycles above 4.75V - enables reliable system reset sequencing. |
Applications
| Industrial Control Power Supplies | General-Purpose Point-of-Load |
|---|---|
Use Scenario: Powering PLC I/O modules, motor drivers, and fieldbus transceivers from 24V DC rails in factory automation cabinets. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying logic, ADCs, and isolated gate drivers. Use Value: High input voltage range (up to 36V) accommodates line transients; hiccup protection ensures robustness against motor stall faults. |
Use Scenario: Local 5V supply for FPGA core or DDR memory termination in telecom base station boards. IC Role / Device Role / Timing Role: Compact, high-efficiency POL converter placed adjacent to load. Use Value: 2A capability and 94% peak efficiency minimize heat generation in dense, air-cooled enclosures. |
| Distributed Supply Regulation | Base Station Power Supplies |
Use Scenario: Secondary regulation stage converting intermediate 12V bus to clean 5V for RF front-end biasing and control logic. IC Role / Device Role / Timing Role: Isolated secondary-side DC-DC regulator with tight load/line regulation (±1.2%). Use Value: Low output voltage drift (<±10mV over 2A load) maintains RF amplifier bias stability and signal integrity. |
Use Scenario: 5V rail generation for control processors and backhaul interface ICs in 5G macrocell units. IC Role / Device Role / Timing Role: Main system supply with RESET signaling for safe boot and brownout recovery. Use Value: RESET delay (1024 cycles) ensures stable VOUT before releasing processor reset, preventing lockup during cold start. |
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 | 4.5V–65V input, 1A output, adjustable VOUT only; no fixed 5V variant; requires external compensation. | Automotive AEC-Q100 qualified; wider VIN but lower current - suitable where 65V transient immunity is critical. | Select LM5164QDDARQ1 only if automotive qualification or >36V input tolerance is mandatory; MAX17632BATE+ offers higher current and simpler design. |
| TPS54202DRCT | 4.5V–28V input, fixed 5V option available; 2A rated but derated above 85°C; no EXTVCC or hiccup mode. | Lacks hiccup protection and EXTVCC efficiency boost; uses external compensation - less robust under overload. | Choose TPS54202DRCT for cost-sensitive non-industrial applications; MAX17632BATE+ delivers superior thermal performance and fault resilience. |
Compared with LM5164QDDARQ1 and TPS54202DRCT, the MAX17632BATE+ uniquely combines fixed 5V output, integrated compensation, hiccup-mode OCP, and EXTVCC efficiency enhancement - making it optimal for industrial 24V systems requiring reliability, simplicity, and 2A capacity.
Availability
MAX17632BATE+ 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 MAX17632BATE+ 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 family is designed for high-voltage, high-efficiency DC-DC conversion in harsh industrial environments - emphasizing wide input range, integrated protection, and minimal external components.
FAQ
What is the output voltage tolerance of the MAX17632BATE+ over temperature?
The MAX17632BATE+ maintains ±1.2% output voltage regulation accuracy across the full operating temperature range of –40°C to +125°C ambient. This specification applies to the fixed 5.0V output and is guaranteed by design and characterization - ensuring consistent performance in industrial control cabinets and outdoor base stations where ambient temperatures fluctuate widely. The MAX17632BATE+ achieves this using an internal precision bandgap reference and trimmed feedback path.
Does the MAX17632BATE+ require external compensation components?
No, the MAX17632BATE+ features built-in compensation across its entire output-voltage range, eliminating the need for external Type-II or Type-III compensation networks. This internal compensation is factory-trimmed and validated for stability with standard ceramic output capacitors (e.g., 22μF X7R), reducing design risk and bill-of-materials count. The MAX17632BATE+ remains stable under all load, line, and temperature conditions without user-adjusted compensation.
How does the EXTVCC pin improve efficiency in the MAX17632BATE+?
The EXTVCC pin on the MAX17632BATE+ accepts an external 4.56–4.84V supply - typically tapped from the regulated 5V output - to power the internal LDO, thereby reducing conduction losses associated with dropping VIN to 5V internally. This feature improves full-load efficiency by up to 1.5% compared to using only the internal VCC LDO, especially at high input voltages like 24V or 36V. The MAX17632BATE+ automatically switches to EXTVCC when valid.
Can the MAX17632BATE+ operate with a prebiased output during startup?
Yes, the MAX17632BATE+ supports monotonic startup into a prebiased output voltage - a critical feature for hot-swap and redundant power systems. When enabled via the SS pin configuration, the device prevents reverse current flow by holding the high-side MOSFET off until the internal soft-start ramp exceeds the present VOUT level. This behavior is verified in the MAX17632BATE+ typical operating characteristics (Figure 23) and ensures safe, glitch-free power-up in multi-rail systems.
What protection features are integrated into the MAX17632BATE+?
The MAX17632BATE+ integrates hiccup-mode overcurrent protection, thermal shutdown (165°C with 10°C hysteresis), output undervoltage monitoring with open-drain RESET, programmable EN/UVLO thresholds, and valley current limiting. These protections operate independently and concurrently - for example, hiccup mode activates on sustained overload while RESET signals downstream logic of output fault. All protections are fully specified in the MAX17632BATE+ electrical characteristics table and do not require external components.
MAX17632BATE+ 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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)
MAX17632BATE+ FAQ
1.How can I place an order for MAX17632BATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17632BATE+ 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 MAX17632BATE+ reliable?
The price and inventory of MAX17632BATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17632BATE+ is usually 5 days.
3.What payment methods are accepted for MAX17632BATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17632BATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17632BATE+?
MAX17632BATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17632BATE+ 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 MAX17632BATE+?
For technical support, including MAX17632BATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17632BATE+ requirements.
6.How does Aetrix verify that MAX17632BATE+ is sourced from the original manufacturer or authorized distributors?
All MAX17632BATE+ 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 MAX17632BATE+ meets industry standards.
7.What is the process for return or replacement of MAX17632BATE+?
All MAX17632BATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17632BATE+, 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 MAX17632BATE+ part is unused and in its original packaging.
Return procedure for MAX17632BATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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