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Analog Devices Inc./Maxim Integrated MAX16956AUBA/V+T
- Part No.:
- MAX16956AUBA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16956AUBA/V+T.pdf
- Description:
- IC REG BUCK 5V 300MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,545
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Product details
Overview
MAX16956AUBA/V+T from Analog Devices is a synchronous buck DC-DC converter IC with integrated high-side and low-side MOSFETs, delivering up to 300mA output current across 3.5V–36V input range, featuring 2.1MHz fixed switching frequency, 1.1µA quiescent current in skip mode (fixed 5V version), and AEC-Q100 qualification for automotive body ECUs.
For engineers reviewing the MAX16956AUBA/V+T datasheet, MAX16956AUBA/V+T pinout, MAX16956AUBA/V+T application, or MAX16956AUBA/V+T equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and EMI performance, and real-world selection guidance for cold-crank and load-dump resilient power supply design.
Technical Context
The MAX16956AUBA/V+T implements current-mode PWM control with integrated slope compensation and cycle-by-cycle peak-current limiting. It uses internal high-side current sensing and an integrated transconductance error amplifier, eliminating external compensation components.
It supports dual operating modes: forced-PWM (via MODE = BIAS) for constant-frequency noise filtering, and skip mode (MODE = GND or floating) enabling ultra-low 1.1µA no-load IQ. Its 97% max duty cycle and 42V input tolerance enable reliable operation during automotive cold-crank (down to 3.5V VIN) and load-dump (up to 42V transient).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V continuous; withstands 42V transients - supports full automotive battery range including cold-crank and load-dump events. |
| Output Current | Up to 300mA - sufficient for powering microcontrollers, CAN transceivers, and sensors in body control modules. |
| Switching Frequency | Fixed 2.1MHz (±6% with spread-spectrum option enabled) - enables use of small 10µH inductors and reduces AM-band interference. |
| Quiescent Current | 1.1µA in skip mode (fixed-output versions only) - meets OEM standby power budgets for always-on automotive modules. |
| Output Voltage | Fixed 5.0V ±2% (MAX16956A variant) - tightly regulated for logic supply rails without external feedback components. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for under-hood and cabin-mounted ECUs. |
| Duty Cycle Max | 97% - maintains regulation down to 3.5V input at 5V output, critical for cold-crank survival. |
| RESET Accuracy | 92% VOUT rising threshold, 90% falling threshold - provides precise power-good monitoring for system sequencing. |
Pinout & Package
MAX16956AUBA/V+T is housed in a 3mm × 3mm, 10-pin µMAX® package with exposed pad (U10E+3), optimized for thermal dissipation in space-constrained automotive PCBs. θJA = 77.6°C/W on single-layer board; θJC = 5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side driver | Requires 0.1µF ceramic capacitor between BST and LX - enables efficient high-side MOSFET gate drive without external charge pump. |
| SUP | Main power input (3.5V–36V) | Accepts wide automotive input; requires ≥4.7µF ceramic decoupling at pin - minimizes high-frequency noise injection into supply rail. |
| LX | Switch node | Connects to inductor; high-impedance when off - must be routed with minimal loop area to reduce EMI and switching losses. |
| PGND | Power ground return | Primary return path for high-current switch node and input/output capacitors - connect to AGND at single star point under device. |
| AGND | Analog ground reference | Reference for feedback, RESET, and internal regulators - isolated routing prevents noise coupling into voltage-sense path. |
| RESET | Open-drain power-good indicator | Asserts low when VOUT falls below 90% nominal - requires external pullup; used for MCU reset sequencing and fault detection. |
| MODE | Operating mode select | Ground/floating = skip mode (1.1µA IQ); tied to BIAS = forced-PWM - enables dynamic efficiency/noise trade-off without firmware change. |
| BIAS | Internal 5V LDO output | Supplies internal circuitry; requires 1µF ceramic cap to AGND - not for external loading; improves PSRR vs. SUP variations. |
| OUT/FB | Output sense / feedback input | Fixed 5V version: direct output connection; senses VOUT for regulation and RESET generation - eliminates need for external resistor divider. |
| EN | Enable control input | Logic-compatible with 3.5V–36V inputs; drives low to disable - supports direct connection to KL30, CAN INH, or microcontroller GPIO. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Reduces BOM count by eliminating external switches; RDS(ON) = 1000–2200mΩ (HS) and 500–1200mΩ (LS) enables >85% efficiency at 300mA. |
| Current-mode control with slope compensation | Enables stable operation without external compensation; provides inherent line regulation and cycle-by-cycle overcurrent protection. |
| Spread-spectrum modulation (factory-enabled) | ±6% frequency dither centered at 2.1MHz - reduces peak EMI emissions by >10dB, easing CISPR 25 Class 5 compliance. |
| Load-line architecture | Intentional output voltage droop under load - increases undershoot margin during load steps, allowing smaller output capacitance (e.g., 22µF X7R). |
| Robust fault protection | Includes cycle-by-cycle current limit, short-circuit recovery (13.4ms retry), and thermal shutdown at +175°C with +15°C hysteresis - ensures survivability in harsh environments. |
| Fixed 5.4ms soft-start | Prevents inrush current and output overshoot during power-up - eliminates need for external soft-start circuitry or timing components. |
Applications
| Automotive Body Control Module (BCM) | Door Module Power Supply |
|---|---|
Use Scenario: Powers MCU, LIN transceiver, and window motor drivers in door control units exposed to battery transients and temperature extremes. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator; provides clean, sequenced power with RESET assertion for safe MCU boot. Use Value: 97% duty cycle sustains regulation during cold-crank (3.5V battery); 42V tolerance survives load-dump; AEC-Q100 ensures long-term reliability. |
Use Scenario: Supplies 5V rail to occupancy sensors, mirror controls, and LED status indicators in side-door assemblies. IC Role / Device Role / Timing Role: Compact, thermally efficient buck converter replacing discrete solutions; RESET signal synchronizes sensor initialization. Use Value: 3mm × 3mm µMAX package fits tight mechanical envelopes; 1.1µA skip-mode IQ extends battery life in key-off monitoring states. |
| Roof Module Telematics Interface | Seat Control Unit (SCU) Subsystem |
Use Scenario: Powers GPS/GNSS receiver, cellular modem, and CAN interface in roof-mounted telematics control units. IC Role / Device Role / Timing Role: Immune-to-noise 5V supply with low EMI profile; RESET monitors voltage integrity before modem wake-up. Use Value: 2.1MHz switching avoids AM radio band (530–1710kHz); spread-spectrum further suppresses radiated emissions per CISPR 25. |
Use Scenario: Delivers regulated 5V to memory, position sensors, and heater drivers in electric seat control modules. IC Role / Device Role / Timing Role: High-reliability DC-DC stage with thermal and short-circuit protection - prevents latch-up during seat motor stall conditions. Use Value: Integrated protection eliminates need for external fuses or current monitors; -40°C to +125°C operation covers full vehicle cabin thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRTWRQ1 | 4.5V–36V input, 3.5A output, 2.1MHz, 15µA IQ - higher current, higher IQ, no spread-spectrum | Targets higher-power domains (e.g., ADAS camera modules); less suitable for ultra-low-IQ body electronics | Select LM61480QRTWRQ1 only if >300mA output or ASIL-B functional safety support is required; MAX16956AUBA/V+T remains optimal for cost- and size-sensitive 5V/300mA nodes. |
| TPS62933QDRLRQ1 | 3V–36V input, 3A output, 2.25MHz, 1.5µA IQ, pin-compatible with TPS6293x family - no AEC-Q100 grade available for this variant | Designed for general automotive power; lacks AEC-Q100 certification in Q1 suffix - requires additional qualification effort | Choose TPS62933QDRLRQ1 only if volume production demands TI's supply chain; MAX16956AUBA/V+T offers pre-qualified AEC-Q100 assurance with identical 5V/300mA capability. |
Compared with LM61480QRTWRQ1 and TPS62933QDRLRQ1, the MAX16956AUBA/V+T delivers best-in-class 1.1µA quiescent current for always-on systems, factory-enabled spread-spectrum for EMI reduction, and full AEC-Q100 Grade 1 qualification - making it the most robust choice for cost-sensitive, space-constrained 5V automotive point-of-load applications.
Availability
MAX16956AUBA/V+T is available at Aetrix Electronics and suitable for automotive body ECUs, point-of-load power supplies, and distributed DC power systems requiring stable component supply, AEC-Q100 compliance, and cold-crank resilience.
Supply support for MAX16956AUBA/V+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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The MAX16956 belongs to Analog Devices' automotive-qualified power management portfolio, designed specifically for robust, low-quiescent-current DC-DC conversion in harsh automotive environments - emphasizing cold-crank survival, EMI control, and AEC-Q100 reliability.
FAQ
What is the exact output voltage tolerance of the MAX16956AUBA/V+T?
The MAX16956AUBA/V+T is a fixed 5.0V output variant with guaranteed accuracy of ±2% over full temperature and load range (4.9V to 5.2V at 300mA, 6V–36V input). This tolerance is specified in the Electrical Characteristics table and applies across the entire −40°C to +125°C operating range, ensuring reliable logic-level compatibility for automotive MCUs and peripherals.
Does the MAX16956AUBA/V+T support spread-spectrum frequency modulation?
Yes, the MAX16956AUBA/V+T includes factory-enabled spread-spectrum modulation with ±6% frequency dither centered at 2.1MHz. This feature is confirmed in the Selector Guide (Table 2), where MAX16956AUBA/V+ is explicitly listed with "On" for Spread Spectrum - reducing peak radiated EMI to aid CISPR 25 Class 5 compliance without external components.
What is the recommended input capacitor configuration for the MAX16956AUBA/V+T?
The MAX16956AUBA/V+T requires a minimum 4.7µF ceramic capacitor from SUP to PGND, plus a 0.1µF ceramic capacitor from SUP to PGND (or BST to LX for bootstrap). Per the Applications Information section, this dual-capacitor approach handles both bulk energy storage and high-frequency decoupling - critical for stable operation at 2.1MHz and suppression of switching noise on the automotive battery rail.
How does the RESET output of the MAX16956AUBA/V+T behave during startup and fault conditions?
The RESET output of the MAX16956AUBA/V+T is open-drain and asserts low when VOUT drops below 90% of nominal (4.5V), and releases high-impedance when VOUT rises above 92% (4.6V). During startup, RESET remains low until soft-start completes (~5.4ms), then transitions high - providing precise power-good signaling for MCU reset sequencing and fault detection in automotive systems.
Is the MAX16956AUBA/V+T pin-compatible with other variants in the MAX16956 family?
Yes, all MAX16956 variants - including MAX16956AUBA/V+T (5V fixed), MAX16956AUBB/V+ (3.3V fixed), and MAX16956AUBC/V+ (adjustable) - share identical 10-pin µMAX package (U10E+3), pinout, and footprint. This allows drop-in replacement across output voltage options without PCB redesign, simplifying BOM management and platform scalability.
MAX16956AUBA/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX-EP
MAX16956AUBA/V+T FAQ
1.How can I place an order for MAX16956AUBA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16956AUBA/V+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 MAX16956AUBA/V+T reliable?
The price and inventory of MAX16956AUBA/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16956AUBA/V+T is usually 5 days.
3.What payment methods are accepted for MAX16956AUBA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16956AUBA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16956AUBA/V+T?
MAX16956AUBA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16956AUBA/V+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 MAX16956AUBA/V+T?
For technical support, including MAX16956AUBA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16956AUBA/V+T requirements.
6.How does Aetrix verify that MAX16956AUBA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16956AUBA/V+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 MAX16956AUBA/V+T meets industry standards.
7.What is the process for return or replacement of MAX16956AUBA/V+T?
All MAX16956AUBA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16956AUBA/V+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 MAX16956AUBA/V+T part is unused and in its original packaging.
Return procedure for MAX16956AUBA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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