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Analog Devices Inc./Maxim Integrated MAX16963RATEA/V+
- Part No.:
- MAX16963RATEA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX16963RATEA/V+.pdf
- Description:
- IC REG BUCK ADJ 1.5A DL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,416
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Product details
Overview
MAX16963RATEA/V+ from Maxim Integrated is a dual synchronous step-down DC-DC converter designed for automotive postregulation and point-of-load applications. It operates from 2.7V to 5.5V input, delivers up to 1.5A per output at 0.8V–3.6V adjustable output voltage, and features fixed 2.2MHz PWM switching with skip mode for light-load efficiency.
For engineers reviewing the MAX16963RATEA/V+ datasheet, MAX16963RATEA/V+ pinout, MAX16963RATEA/V+ application, or MAX16963RATEA/V+ equivalent, key selection considerations include its -40°C to +125°C automotive qualification, dual independent enable inputs (EN1/EN2), open-drain power-good outputs (PG1/PG2), spread-spectrum capability, and TQFN-EP 4mm × 4mm 16-pin package with exposed thermal pad.
Technical Context
The MAX16963RATEA/V+ integrates two independent synchronous buck controllers with internal 90mΩ pMOS and 68mΩ nMOS high-efficiency switches per channel. Its 2.2MHz fixed-frequency PWM operation enables all-ceramic capacitor designs and fast transient response, while skip mode reduces quiescent current to 36µA under light load.
It implements peak-current-mode control with built-in soft-start (8ms), power-good delay (16ms), overcurrent protection (2.35A typical current-limit threshold), and thermal shutdown at 165°C with 15°C hysteresis. The SYNC pin is factory-configured as input-only, supporting external synchronization from 1.7MHz to 2.4MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports wide automotive battery rail including cold-crank conditions down to 2.7V. |
| Output Voltage Range | 0.8V to 3.6V adjustable via external resistive divider - enables precise rail generation for microcontrollers, sensors, and FPGAs. |
| Max Output Current | 1.5A per channel - sufficient for powering dual-core SoCs or multiple peripheral rails simultaneously. |
| Switching Frequency | 2.2MHz (±10%) - allows compact 1.5µH–2.2µH inductors and eliminates audible noise in vehicle cabins. |
| Quiescent Current | 36µA in skip mode - extends battery life in always-on automotive modules such as telematics and ADAS sensors. |
| Feedback Accuracy | ±3% over load, line, and temperature - ensures stable regulation without external trimming components. |
| Thermal Range | -40°C to +125°C ambient - qualified for under-hood and infotainment system deployment per AEC-Q100 requirements. |
Pinout & Package
The MAX16963RATEA/V+ is housed in a thermally enhanced 4mm × 4mm, 16-pin TQFN-EP package with exposed pad (EP) for optimal heat dissipation. Pin numbering follows standard top-view orientation with EP connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX1, LX2 | Switching node for Channel 1 and Channel 2 | High-impedance when respective converter is disabled; requires low-inductance layout to minimize EMI and ringing. |
| PGND1, PGND2 | Power ground return for each channel's high-side/lower-side switch | Must be routed separately from analog ground and tied to EP near IC to reduce ground bounce. |
| PV1, PV2, PV | Input supply pins for Channel 1, Channel 2, and device bias | PV1/PV2 require ≥4.7µF ceramic bypass to respective PGND; PV requires ≥1µF + 10Ω RC filter for stability. |
| EN1, EN2 | Independent enable inputs for each converter | Logic-high (>2.4V) enables corresponding channel; internal 100kΩ pulldown ensures safe default-off state. |
| OUTS1, OUTS2 | Feedback inputs for adjustable output versions | Accepts 800mV reference; connects to resistive divider from VOUTx to set output voltage between 0.8V–3.6V. |
| PG1, PG2 | Open-drain power-good outputs | Assert low when output drops >8%; requires external 10kΩ pull-up; provides 16ms timeout after regulation recovery. |
| PWM | Mode control input | High forces fixed-frequency PWM; low enables skip mode for improved light-load efficiency. |
| SYNC | Factory-set synchronization I/O | Configured as input-only in RATE variant; accepts 1.7–2.4MHz external clock to synchronize switching and reduce EMI. |
| GND | Analog ground reference | Must be connected to main system ground plane; kept separate from PGND traces until single-point tie to EP/GND. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck regulators | Enables simultaneous generation of two different output voltages (e.g., 3.3V for MCU and 1.8V for memory) with separate enable and power-good signals. |
| 2.2MHz fixed-frequency PWM + skip mode | Ensures consistent EMI profile during heavy load while reducing gate charge losses and improving efficiency below ~100mA per channel. |
| Spread-spectrum modulation | Reduces peak radiated emissions by ±6% frequency dithering - critical for meeting CISPR 25 Class 5 automotive EMC requirements. |
| Integrated low-RDS(ON) MOSFETs | 90mΩ pMOS / 68mΩ nMOS per channel minimizes conduction loss and eliminates need for external discrete switches or drivers. |
| Automotive-grade thermal protection | 165°C thermal shutdown with 15°C hysteresis prevents latch-up during sustained overload or poor heatsinking in confined enclosures. |
Applications
| Automotive Infotainment Power Supply | ADAS Camera Module Regulation |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and display interface in head-unit systems requiring dual regulated rails with tight sequencing and fault reporting. IC Role / Device Role / Timing Role: Dual-channel postregulator providing isolated 3.3V and 1.8V outputs with independent enable control and synchronized power-good assertion. Use Value: Eliminates need for two discrete converters; 2.2MHz operation avoids AM band interference; -40°C to +125°C rating ensures reliability across vehicle operating conditions. |
Use Scenario: Supplies image sensor, ISP, and serial interface in rear-view or surround-view camera modules mounted near hot engine compartments. IC Role / Device Role / Timing Role: Point-of-load regulator delivering stable 1.2V core and 2.8V I/O rails with fast transient response to handle burst-mode imaging loads. Use Value: Built-in soft-start limits inrush current during ignition cycles; spread-spectrum reduces EMI coupling into sensitive analog video paths. |
| Industrial Telematics Gateway | Rail-Specific Sensor Hub Power |
|
Use Scenario: Provides primary 3.3V logic rail and secondary 5V USB-peripheral rail in LTE-connected vehicle tracking units deployed in uncontrolled ambient environments. IC Role / Device Role / Timing Role: Dual-output DC-DC converter with independent EN1/EN2 enabling controlled power-up sequence and graceful shutdown during low-battery events. Use Value: 36µA quiescent current in skip mode extends backup battery runtime; AEC-Q100 qualification validates long-term field reliability. |
Use Scenario: Powers mixed-signal sensor array (IMU, pressure, humidity) in autonomous driving domain controllers where rail isolation and noise immunity are critical. IC Role / Device Role / Timing Role: Dual low-noise buck regulator generating clean 1.8V analog and 3.3V digital supplies with separate PG outputs for independent health monitoring. Use Value: Independent feedback loops prevent cross-regulation; 2.2MHz switching avoids overlap with sensor sampling frequencies; TQFN-EP package enables compact layout on dense PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20004AATP/V+ | Single-channel 2.2MHz buck with 3A output; no second channel or dual PG outputs. | Suitable only when one high-current rail suffices; lacks independent enable/control per rail. | Select MAX20004AATP/V+ if system requires higher single-rail current (3A) and can consolidate functions onto one output. |
| TPS65023BRSBR | Triple-output PMIC (2 buck + 1 LDO); 1.5A per buck but lower 2.25MHz max frequency; no spread-spectrum. | Includes integrated LDO for auxiliary bias; broader feature set but larger footprint and less flexible sequencing. | Choose TPS65023BRSBR when needing three regulated outputs and an LDO in one package, accepting trade-offs in EMI performance and layout simplicity. |
Compared with MAX16963RATEA/V+, MAX20004AATP/V+ offers higher per-rail current but no dual-channel autonomy, while TPS65023BRSBR adds an LDO and third output at the cost of increased complexity and reduced EMI mitigation - making MAX16963RATEA/V+ optimal for dual-rail, space-constrained, automotive EMC-sensitive designs.
Availability
MAX16963RATEA/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics gateways requiring stable component supply with full AEC-Q100 qualification and long-lifecycle support.
Supply support for MAX16963RATEA/V+ 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 automotive, industrial, and communications markets.
The MAX16963 product line targets automotive power conversion with emphasis on high-frequency operation, thermal robustness, and EMI reduction - specifically engineered for postregulation in safety-critical and space-constrained vehicle subsystems.
FAQ
What is the function of the SYNC pin on the MAX16963RATEA/V+?
The SYNC pin on the MAX16963RATEA/V+ is factory-configured as an input-only terminal that accepts an external 1.7MHz to 2.4MHz clock signal to synchronize the internal 2.2MHz oscillator. This synchronization reduces beat-frequency EMI and enables deterministic switching alignment across multiple MAX16963RATEA/V+ devices in multi-rail systems, improving overall electromagnetic compatibility in automotive applications.
Does the MAX16963RATEA/V+ support adjustable output voltage?
Yes, the MAX16963RATEA/V+ supports adjustable output voltage from 0.8V to 3.6V per channel using external resistive dividers connected to OUTS1 and OUTS2. Each feedback input references an internal 800mV precision bandgap, enabling ±3% regulation accuracy across temperature and load. Fixed-output variants exist, but RATEA/V+ is explicitly designated as externally adjustable per the Selector Guide.
What thermal protection features does the MAX16963RATEA/V+ include?
The MAX16963RATEA/V+ incorporates thermal shutdown at 165°C (typical) with 15°C hysteresis to prevent permanent damage during sustained overload or inadequate heatsinking. When junction temperature exceeds the threshold, the internal bias regulator and step-down controllers disable until temperature falls below 150°C. This protection is fully integrated and requires no external components, ensuring reliable operation in automotive under-hood environments.
How does the MAX16963RATEA/V+ manage light-load efficiency?
The MAX16963RATEA/V+ improves light-load efficiency through skip mode operation, activated by pulling the PWM pin low. In this mode, the converter discontinues switching until output voltage droops below regulation, reducing gate drive and switching losses. Quiescent current drops to 36µA, significantly extending battery life in always-on automotive modules such as telematics and sensor hubs where average load remains below 100mA per channel.
What package type is used for the MAX16963RATEA/V+?
The MAX16963RATEA/V+ uses a 4mm × 4mm, 16-pin TQFN-EP (Thin Quad Flat No-lead with Exposed Pad) package. The exposed thermal pad (EP) must be soldered to a large contiguous copper ground plane for effective heat dissipation, supporting continuous operation at full 1.5A per channel within the -40°C to +125°C automotive temperature range.
MAX16963RATEA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (4x4)
MAX16963RATEA/V+ FAQ
1.How can I place an order for MAX16963RATEA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16963RATEA/V+ 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 MAX16963RATEA/V+ reliable?
The price and inventory of MAX16963RATEA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16963RATEA/V+ is usually 5 days.
3.What payment methods are accepted for MAX16963RATEA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16963RATEA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16963RATEA/V+?
MAX16963RATEA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16963RATEA/V+ 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 MAX16963RATEA/V+?
For technical support, including MAX16963RATEA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16963RATEA/V+ requirements.
6.How does Aetrix verify that MAX16963RATEA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16963RATEA/V+ 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 MAX16963RATEA/V+ meets industry standards.
7.What is the process for return or replacement of MAX16963RATEA/V+?
All MAX16963RATEA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16963RATEA/V+, 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 MAX16963RATEA/V+ part is unused and in its original packaging.
Return procedure for MAX16963RATEA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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