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Analog Devices Inc./Maxim Integrated MAX16956AUBF/V+
- Part No.:
- MAX16956AUBF/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16956AUBF/V+.pdf
- Description:
- IC REG BUCK ADJ 300MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
MAX16956AUBF/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, 1.1µA quiescent current in skip mode, and adjustable 1V–15V output via external resistor divider - deployed in automotive body ECUs for cold-crank operation.
For engineers reviewing the MAX16956AUBF/V+ datasheet, MAX16956AUBF/V+ pinout, MAX16956AUBF/V+ application, or MAX16956AUBF/V+ equivalent, key selection considerations include AEC-Q100 qualification, spread-spectrum EMI reduction, 97% max duty cycle for dropout operation, -40°C to +125°C automotive temperature range, and 10-pin µMAX® package thermal performance.
Technical Context
The MAX16956AUBF/V+ implements current-mode PWM control with integrated slope compensation and load-line architecture to reduce required output capacitance. It uses internal high-side current sensing and integrated error-amplifier compensation, eliminating external compensation components.
This variant supports adjustable output (1V–15V) via FB pin, includes factory-enabled spread-spectrum modulation (±6% around 2.1MHz), and features dual operating modes: forced-PWM (via MODE = BIAS) and ultra-low-IQ skip mode (MODE = GND/open). RESET monitors VOUT with 90–94% threshold hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V (42V tolerant); enables direct connection to automotive battery under load-dump and cold-crank conditions. |
| Output Current | Up to 300mA continuous; sufficient for powering microcontrollers, sensors, and CAN transceivers in body control modules. |
| Switching Frequency | Fixed 2.1MHz (±6% spread-spectrum); allows use of compact 10µH inductors and reduces AM-band interference. |
| Quiescent Current | 1.1µA in skip mode (fixed-output versions only); meets OEM requirements for always-on subsystems with <10µA standby budget. |
| Output Voltage Range | Adjustable 1V to 15V via external resistor divider on FB pin; supports diverse SoC core/logic rail requirements. |
| Duty Cycle Max | 97%; sustains regulation during cold-crank events down to ~3.6V input while maintaining 3.3V/5V output. |
| Operating Temp | -40°C to +125°C ambient; qualified per AEC-Q100 Grade 1, suitable for under-hood and cabin-mounted ECUs. |
| Package | 10-pin µMAX® (3mm × 3mm, exposed pad); provides low θJA = 77.6°C/W for thermally constrained automotive PCBs. |
Pinout & Package
MAX16956AUBF/V+ is housed in a 10-pin µMAX® package (U10E+3 outline) with exposed thermal pad (EP), rated for -40°C to +125°C operation and AEC-Q100 qualification. The EP must be soldered to a large PGND copper plane using multiple vias for effective heat dissipation.
| 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 100% duty-cycle capability near dropout. |
| SUP | Main power input (3.5V–36V) | Accepts automotive battery directly; requires ≥4.7µF ceramic decoupling at pin for 2.1MHz noise suppression. |
| LX | Switching node (drain of HS-FET / source of LS-FET) | Connects to external inductor; high dv/dt node requiring short, low-inductance layout to minimize EMI. |
| PGND | Power ground return path | Must connect to EP and output capacitor cathode; forms low-impedance return for high-current switching loop. |
| AGND | Analog reference ground | Star-connected to PGND only at output capacitor cathode; isolates sensitive feedback and bias circuitry. |
| RESET | Open-drain output voltage monitor | Pulls low when VOUT falls below 90% nominal; requires external pullup for system reset assertion. |
| MODE | Operation mode select (skip vs. forced-PWM) | Ground or open = skip mode (1.1µA IQ); tie to BIAS = forced-PWM (constant 2.1MHz, higher light-load ripple). |
| BIAS | Internal 5V LDO output | Supplies internal logic; requires 1µF ceramic cap to AGND; not for external loading. |
| OUT/FB | Feedback input (adjustable version) | Connects to resistor divider (R1/R2) between VOUT and AGND; sets output via VFB = 1.0V ±3% reference. |
| EN | Enable input (3.5V–36V compatible) | Active-high; compatible with KL30/KL15 signals; 0.1µA input current enables direct microcontroller GPIO drive. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous FETs | Eliminates need for external low-side diode or MOSFET; reduces BOM count and improves efficiency at 300mA load. |
| Spread-spectrum modulation | ±6% frequency dither centered at 2.1MHz; lowers peak radiated EMI by >10dB without adding filter components. |
| Load-line output positioning | Output voltage rises slightly at no load (within tolerance), then decreases linearly with load; cuts required output capacitance by ~30%. |
| Current-mode control with slope comp | Enables stable operation with ceramic output caps; eliminates need for external compensation network or type-II/III loop filters. |
| Robust fault protection | Includes cycle-by-cycle current limit, thermal shutdown (175°C), short-circuit recovery with 13.4ms retry delay, and UVLO (3.2V rising). |
| Automotive-grade reliability | AEC-Q100 qualified, 42V input tolerant, -40°C to +125°C operation, and 100% production-tested electrical limits at +25°C/+125°C. |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powers MCU, LIN transceiver, and door-lock actuators in centralized BCM under cold-crank (5.5V battery dip) and load-dump (42V surge) conditions. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator with 97% duty cycle and 42V tolerance; RESET asserts system reset if output drops below 90%. Use Value: Maintains regulated output during 3.5V input dips, enabling uninterrupted ECU operation without brownout resets. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera modules mounted in exterior housings. IC Role / Device Role / Timing Role: Adjustable 1.8V/2.8V rail generator using FB divider; operates in forced-PWM mode to suppress switching noise near analog video paths. Use Value: 2.1MHz switching avoids interference with image sensor pixel clock harmonics; spread-spectrum further reduces spectral peaks. |
| Telematics Control Unit (TCU) | Electronic Parking Brake (EPB) Actuator |
|
Use Scenario: Generates 3.3V for cellular modem, GNSS receiver, and CAN FD controller in always-on telematics gateway. IC Role / Device Role / Timing Role: Low-IQ buck converter in skip mode; EN controlled by ignition signal; BIAS powers internal logic without external load. Use Value: 1.1µA quiescent current enables multi-year battery backup operation during vehicle sleep states. |
Use Scenario: Provides 5V rail for motor driver IC and position sensor in EPB actuator assembly exposed to under-chassis vibration and temperature extremes. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 regulator with thermal shutdown (175°C) and short-circuit recovery; LX node routed with minimum loop area. Use Value: Withstands 125°C ambient and repeated short-circuits during motor stall; exposed pad ensures reliable thermal dissipation in sealed housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRNXTQ1 | 3.5V–36V input, 3.5A output, 2.1MHz, no spread-spectrum, 15µA IQ in LP mode | Higher current capacity but larger 16-pin WQFN; lacks AEC-Q100 Grade 1 rating (only Grade 0) | Select when >300mA load or lower thermal resistance (θJA = 26.2°C/W) is required; verify RESET compatibility. |
| TPS62933-Q1 | 3V–36V input, 3A output, 2.2MHz, spread-spectrum enabled, 1.2µA IQ, 12-pin VQFN | Higher output current and tighter VOUT accuracy (±0.5%), but no integrated BIAS LDO or load-line feature | Prefer for systems needing higher current headroom and tighter regulation; requires external 5V bias supply for logic blocks. |
Compared with LM61480QRNXTQ1 and TPS62933-Q1, the MAX16956AUBF/V+ offers unique integration of BIAS LDO, load-line output positioning, and AEC-Q100 Grade 1 qualification in a 3mm × 3mm footprint - making it optimal for space-constrained, ultra-low-power automotive body electronics where 300mA is sufficient.
Availability
MAX16956AUBF/V+ is available at Aetrix Electronics and suitable for automotive body ECUs, ADAS camera modules, telematics control units, and electronic parking brake systems requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.
Supply support for MAX16956AUBF/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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for industrial, automotive, communications, and healthcare markets.
The MAX16956 belongs to Analog Devices' automotive power management portfolio, designed specifically for robust, low-quiescent-current DC-DC conversion in harsh automotive environments - emphasizing cold-crank resilience, EMI control, and AEC-Q100 reliability.
FAQ
What output voltage range does the MAX16956AUBF/V+ support?
The MAX16956AUBF/V+ is the adjustable-output variant of the MAX16956 family and supports an output voltage range of 1V to 15V, set via an external resistor divider connected to the OUT/FB pin. The internal feedback reference is precisely 1.0V ±3%, enabling accurate programming across this full range. This flexibility makes the MAX16956AUBF/V+ suitable for powering diverse loads including microcontroller cores, interface I/O, and analog sensors without requiring multiple fixed-voltage SKUs.
Does the MAX16956AUBF/V+ include spread-spectrum frequency modulation?
Yes, the MAX16956AUBF/V+ includes factory-enabled spread-spectrum frequency modulation, varying the 2.1MHz switching frequency by ±6% with a 230µs modulation period. This feature is confirmed in the Selector Guide (Table 2), which lists "On" for Spread Spectrum under the MAX16956AUBF/V+ row. The modulation reduces peak radiated EMI emissions without requiring additional filtering components - a critical advantage in dense automotive PCB layouts.
What is the quiescent current of the MAX16956AUBF/V+ in skip mode?
The MAX16956AUBF/V+ draws 1.1µA quiescent current in skip mode - but only when configured as a fixed-output version (e.g., MAX16956AUBA/V+ or MAX16956AUBB/V+). As an adjustable-output part, its no-load supply current is specified at 32µA to 70µA (typical 32µA), per the Electrical Characteristics table. This distinction arises because the internal 5V BIAS regulator remains active and unregulated in adjustable mode, increasing baseline consumption.
How is thermal management handled in the MAX16956AUBF/V+ package?
The MAX16956AUBF/V+ uses a 10-pin µMAX® package with an exposed thermal pad (EP) that must be soldered to a large PGND copper plane using multiple vias. Its thermal resistance is θJA = 77.6°C/W on a single-layer board, and θJC = 5°C/W. The device includes thermal shutdown at +175°C with +15°C hysteresis. Effective thermal design requires connecting EP to PGND at the output capacitor's ground terminal and avoiding reliance on EP alone for grounding - ensuring safe operation at full 300mA load across -40°C to +125°C.
Can the MAX16956AUBF/V+ operate during automotive cold-crank conditions?
Yes, the MAX16956AUBF/V+ is explicitly designed for cold-crank operation, supporting input voltages as low as 3.5V and achieving up to 97% maximum duty cycle. This allows it to maintain regulation of its 1V–15V output even when the automotive battery sags to ~3.6V - a typical cold-crank condition. Its current-mode control, integrated high-side sensing, and robust UVLO (3.2V rising threshold) ensure stable startup and continuous operation without dropout or reset assertion during these transient events.
MAX16956AUBF/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
MAX16956AUBF/V+ FAQ
1.How can I place an order for MAX16956AUBF/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16956AUBF/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 MAX16956AUBF/V+ reliable?
The price and inventory of MAX16956AUBF/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16956AUBF/V+ is usually 5 days.
3.What payment methods are accepted for MAX16956AUBF/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16956AUBF/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16956AUBF/V+?
MAX16956AUBF/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16956AUBF/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 MAX16956AUBF/V+?
For technical support, including MAX16956AUBF/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16956AUBF/V+ requirements.
6.How does Aetrix verify that MAX16956AUBF/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16956AUBF/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 MAX16956AUBF/V+ meets industry standards.
7.What is the process for return or replacement of MAX16956AUBF/V+?
All MAX16956AUBF/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16956AUBF/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 MAX16956AUBF/V+ part is unused and in its original packaging.
Return procedure for MAX16956AUBF/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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