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Analog Devices Inc./Maxim Integrated MAX16956AUBC/V+
- Part No.:
- MAX16956AUBC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16956AUBC/V+.pdf
- Description:
- IC REG BUCK ADJ 300MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
MAX16956AUBC/V+ 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, adjustable 1V–15V output via resistor divider, and 1.1µA quiescent current in skip mode - used for point-of-load regulation in automotive body ECUs under cold-crank conditions.
For engineers reviewing the MAX16956AUBC/V+ datasheet, MAX16956AUBC/V+ pinout, MAX16956AUBC/V+ application, or MAX16956AUBC/V+ equivalent, key selection criteria include its AEC-Q100 qualification, 10-pin µMAX package with exposed pad, -40°C to +125°C operating range, spread-spectrum EMI reduction (disabled in this variant), and dual-mode operation (forced-PWM/skip) with MODE pin control.
Technical Context
The MAX16956AUBC/V+ implements current-mode PWM control with integrated slope compensation and cycle-by-cycle peak-current limiting, enabling stable regulation without external compensation. Its load-line architecture dynamically adjusts output voltage position based on load to reduce required output capacitance while maintaining transient response margin.
It integrates a 5V BIAS LDO for internal logic, features undervoltage lockout at 3.2V (typ), soft-start ramp time of 5.4ms, and open-drain RESET output with 92% rising/90% falling thresholds referenced to VOUT - all operating within the full automotive temperature range and qualified to AEC-Q100 Grade 0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V (42V tolerant); supports automotive cold-crank down to 3.5V and load-dump up to 42V. |
| Output Current | Up to 300mA continuous; sufficient for powering microcontrollers, sensors, and CAN transceivers in body electronics. |
| Switching Frequency | 2.1MHz (±6% over temp); enables use of small 10µH inductors and low-ESR ceramic capacitors, avoiding AM-band interference. |
| Quiescent Current | 1.1µA in skip mode (no load); meets OEM requirements for ultra-low standby power in always-on modules. |
| Output Voltage Range | Adjustable 1V to 15V via external resistor divider; FB pin reference is 1.0V ±3%, enabling precise custom rail generation. |
| Operating Temperature | -40°C to +125°C ambient; qualified per AEC-Q100 Rev G Grade 0, suitable for under-hood and cabin-mounted ECUs. |
| Duty Cycle Max | 97%; allows regulation during cold-crank when input drops near output voltage, critical for engine start reliability. |
Pinout & Package
MAX16956AUBC/V+ is housed in a 3mm × 3mm, 10-pin µMAX® package with exposed thermal pad (EP), RoHS-compliant, and designed for surface-mount assembly on automotive-grade PCBs with multi-layer thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side gate driver | Requires 0.1µF ceramic capacitor between BST and LX; enables efficient high-side MOSFET drive without external charge pump. |
| SUP | Main input supply (3.5V–36V) | Accepts automotive battery rail directly; must be decoupled with ≥4.7µF ceramic cap to PGND for EMI suppression. |
| LX | Switch node connecting internal HS/LS FETs | High dv/dt node; requires short, low-inductance layout to minimize ringing and EMI; connects to external inductor. |
| PGND | Power ground return for high-current paths | Must connect to EP and output capacitor negative terminal in star topology; separates high-current return from analog ground. |
| AGND | Analog ground reference for feedback and bias | Connects to PGND only at output capacitor return; isolates noise-sensitive circuitry from switching currents. |
| RESET | Open-drain output monitoring VOUT quality | Requires external pullup; asserts low when VOUT falls below 90% nominal, enabling system-level fault detection and sequencing. |
| MODE | Operation mode select (skip vs forced-PWM) | Ground or floating = skip mode (1.1µA IQ); tied to BIAS = forced-PWM (constant 2.1MHz, lower light-load ripple). |
| BIAS | 5V internal LDO output | Supplies internal logic; must be bypassed with 1µF ceramic cap to AGND; not intended for external loading. |
| OUT/FB | Feedback input (adjustable version) | Connects to resistive divider between VOUT and AGND; sets output via VFB = 1.0V reference; high-impedance (0.02µA input current). |
| EN | Enable input compatible with SUP voltage | Logic-high (>2.4V) enables regulator; logic-low (<0.4V) disables with <0.1µA shutdown current; accepts direct connection to KL30 or CAN INH. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous MOSFETs | Eliminates need for external high-side/low-side switches and reduces board area by >40% vs discrete solutions. |
| Current-mode control with slope compensation | Provides inherent line regulation, simplified loop stability, and robust cycle-by-cycle current limiting without external compensation. |
| Load-line output positioning | Reduces required output capacitance by up to 30% through intentional no-load overvoltage and controlled droop under load. |
| AEC-Q100 Grade 0 qualification | Validated for automotive applications requiring operation from -40°C to +125°C ambient with full parametric testing. |
| Thermal and short-circuit protection | Shuts down at 175°C junction temp with 15°C hysteresis; enters hiccup mode during hard short, limiting average power dissipation. |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Supply |
|---|---|
Use Scenario: Regulating 3.3V or 5V rails for microcontrollers, LIN transceivers, and door-lock actuators in BCMs exposed to wide battery voltage swings. IC Role / Device Role / Timing Role: Primary point-of-load buck converter providing stable, low-noise power with cold-crank support and RESET monitoring. Use Value: Enables single-chip solution replacing discrete regulators and LDOs, reducing BOM count and improving cold-crank reliability below 6V input. | Use Scenario: Generating clean 1.8V or 2.5V supply for image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: Adjustable-output buck converter delivering tightly regulated voltage with low EMI and high PSRR for noise-sensitive analog front-ends. Use Value: 2.1MHz switching avoids interference with camera pixel clock harmonics; spread-spectrum disabled in MAX16956AUBC/V+ simplifies EMI filtering for fixed-frequency compliance. |
| Telematics Control Unit (TCU) Core Rail | Automotive Gateway ECU Power |
Use Scenario: Providing 1.2V or 1.5V core voltage for cellular modem SoCs in TCUs subject to frequent sleep/wake cycles and strict quiescent current limits. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in skip mode during deep-sleep states to maintain sub-5µA system standby current. Use Value: 1.1µA IQ in skip mode ensures TCU meets OEM 100µA total module standby spec even with multiple downstream LDOs active. | Use Scenario: Generating isolated 5V and 3.3V rails for CAN FD, Ethernet AVB, and microcontroller subsystems in central gateway ECUs handling multi-bus communication. IC Role / Device Role / Timing Role: Dual-rail capable buck converter supporting flexible power tree design with independent enable and RESET signaling per domain. Use Value: MODE pin enables dynamic switching between forced-PWM (for low-noise CAN domains) and skip mode (for low-power sleep domains) without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QWRNXTQ1 | 4.5V–36V input, 8A output, 2.1MHz, but larger 16-pin WQFN; no integrated BIAS LDO; requires external compensation. | Targeted at higher-current applications (e.g., infotainment processors); lacks integrated 5V BIAS rail and load-line architecture. | Select when >500mA output or higher VIN transients (>65V) are required; not drop-in due to different pinout, compensation, and feature set. |
| TPS62933QPWQRQ1 | 3V–18V input, 3A output, 1.8MHz, integrated PMBus; includes telemetry and programmable soft-start; no spread-spectrum option. | Designed for advanced diagnostics and digital power management in ADAS domain controllers; exceeds MAX16956AUBC/V+ voltage range. | Choose for systems requiring real-time telemetry, I²C configuration, or tighter output accuracy (±0.5%); incompatible with 24V+ automotive inputs. |
Compared with LM61480QWRNXTQ1 and TPS62933QPWQRQ1, the MAX16956AUBC/V+ offers superior cold-crank capability (3.5V start), integrated BIAS LDO, and load-line optimization for minimal output capacitance - making it uniquely suited for compact, cost-sensitive 300mA automotive point-of-load designs where space and quiescent current are critical.
Availability
MAX16956AUBC/V+ is available at Aetrix Electronics and suitable for automotive body ECUs, ADAS camera modules, telematics control units, and gateway ECUs requiring stable component supply with AEC-Q100 assurance and long-term production continuity.
Supply support for MAX16956AUBC/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
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 with precision power, sensing, and connectivity solutions.
The MAX16956 belongs to Analog Devices' automotive-qualified power management portfolio, designed specifically for robust, space-constrained DC-DC conversion in harsh automotive environments - emphasizing ultra-low IQ, cold-crank resilience, and AEC-Q100 compliance.
FAQ
What output voltage range does the MAX16956AUBC/V+ support?
The MAX16956AUBC/V+ supports an adjustable output voltage range of 1V to 15V, set using an external resistor divider connected to the OUT/FB pin. Its internal feedback reference is precisely 1.0V ±3%, enabling accurate regulation across the full range. This makes the MAX16956AUBC/V+ suitable for generating custom rails such as 1.2V for microcontroller cores or 12V for sensor biasing - unlike fixed-output variants (e.g., MAX16956AUBA+/V+ for 5V).
Does the MAX16956AUBC/V+ include spread-spectrum frequency modulation?
No, the MAX16956AUBC/V+ does not include spread-spectrum frequency modulation. Per the Selector Guide (Table 2), only the D, E, and F variants (e.g., MAX16956AUBD/V+) have factory-enabled spread-spectrum. The MAX16956AUBC/V+ has spread-spectrum disabled, operating at a fixed 2.1MHz ±6% switching frequency - simplifying EMI filter design for applications where deterministic frequency behavior is preferred.
How is the MODE pin used on the MAX16956AUBC/V+?
On the MAX16956AUBC/V+, the MODE pin selects between skip mode (ultra-low IQ) and forced-PWM mode (constant frequency). Leaving MODE unconnected or tying it to ground enables skip mode (1.1µA IQ). Connecting MODE to BIAS enables forced-PWM mode, maintaining 2.1MHz switching regardless of load - useful for noise-sensitive domains like CAN or audio. The pin includes a 1MΩ internal pulldown, ensuring default skip-mode operation if left floating.
What thermal protection features does the MAX16956AUBC/V+ provide?
The MAX16956AUBC/V+ includes thermal shutdown at +175°C (typ) with +15°C hysteresis, automatically disabling switching until junction temperature falls below +160°C. It also incorporates cycle-by-cycle current limiting and hiccup-mode short-circuit protection: after 15 current-limited cycles, it pauses for 13.4ms before reattempting soft-start. These protections ensure reliable operation in sealed enclosures or high-ambient environments typical of automotive under-hood locations.
Can the MAX16956AUBC/V+ operate during automotive cold-crank conditions?
Yes, the MAX16956AUBC/V+ is specifically designed for cold-crank operation, supporting input voltages as low as 3.5V while maintaining regulation up to 97% duty cycle. Its ability to sustain output during cranking events - when battery voltage can dip to 3.2V - is validated across the full -40°C to +125°C temperature range and confirmed by AEC-Q100 Grade 0 qualification. This makes the MAX16956AUBC/V+ ideal for always-on automotive modules requiring uninterrupted power during engine start.
MAX16956AUBC/V+ 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:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 10V
- 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
MAX16956AUBC/V+ FAQ
1.How can I place an order for MAX16956AUBC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16956AUBC/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 MAX16956AUBC/V+ reliable?
The price and inventory of MAX16956AUBC/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16956AUBC/V+ is usually 5 days.
3.What payment methods are accepted for MAX16956AUBC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16956AUBC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16956AUBC/V+?
MAX16956AUBC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16956AUBC/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 MAX16956AUBC/V+?
For technical support, including MAX16956AUBC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16956AUBC/V+ requirements.
6.How does Aetrix verify that MAX16956AUBC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16956AUBC/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 MAX16956AUBC/V+ meets industry standards.
7.What is the process for return or replacement of MAX16956AUBC/V+?
All MAX16956AUBC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16956AUBC/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 MAX16956AUBC/V+ part is unused and in its original packaging.
Return procedure for MAX16956AUBC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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