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Analog Devices Inc./Maxim Integrated MAX16956AUBB/V+
- Part No.:
- MAX16956AUBB/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16956AUBB/V+.pdf
- Description:
- IC REG BUCK 3.3V 300MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:170
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Product details
Overview
MAX16956AUBB/V+ from Analog Devices is a 3.3V fixed-output, 300mA synchronous buck converter with integrated high-side and low-side MOSFETs, 2.1MHz switching frequency, 1.1µA quiescent current in skip mode, and AEC-Q100 qualification for automotive body ECUs under cold-crank conditions.
For engineers reviewing the MAX16956AUBB/V+ datasheet, MAX16956AUBB/V+ pinout, MAX16956AUBB/V+ application, or MAX16956AUBB/V+ equivalent, key selection factors include its 3.3V fixed output, -40°C to +125°C operating range, 3.5V–36V input voltage support, 97% max duty cycle, and µMAX-EP 10-pin package with exposed pad thermal management.
Technical Context
The MAX16956AUBB/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 integrates error-amplifier compensation, eliminating external compensation components.
It supports dual operation 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. The RESET output provides open-drain monitoring of VOUT at 92% (rising) and 90% (falling) thresholds with 12µs debounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% over full load/temperature range - ensures stable logic supply for automotive microcontrollers. |
| Input Voltage Range | 3.5V to 36V (42V tolerant) - supports 12V/24V automotive systems including cold-crank (down to 3.5V) and load-dump (up to 42V). |
| Max Output Current | 300mA continuous - sufficient for point-of-load regulation of MCU cores, CAN transceivers, or sensor interfaces. |
| Quiescent Current | 1.1µA in skip mode - meets OEM standby power budgets for always-on automotive modules. |
| Switching Frequency | 2.1MHz (±6% with spread-spectrum option disabled) - enables use of small 10µH inductors and reduces AM-band EMI. |
| Duty Cycle Max | 97% - maintains regulation during cold-crank when input drops to ~3.4V at 3.3V output. |
| Operating Temp | -40°C to +125°C - qualified across full automotive junction temperature range per AEC-Q100 Rev G. |
Pinout & Package
MAX16956AUBB/V+ is housed in a 3mm × 3mm, 10-pin µMAX® package with exposed pad (U10E+3 outline), optimized for thermal dissipation on automotive PCBs with θJA = 77.6°C/W (single-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Drives high-side MOSFET gate; requires 0.1µF ceramic capacitor between BST and LX. |
| SUP | Main IC supply input | Accepts 3.5V–36V; requires ≥4.7µF ceramic decoupling to PGND for stability. |
| LX | Switching node | Connects to external inductor; high-impedance when device is off; critical for EMI layout. |
| PGND | Power ground | High-current return path; must connect to AGND at single star point under device. |
| AGND | Analog ground | Reference for feedback, RESET, and MODE; isolated routing prevents noise coupling. |
| RESET | Open-drain reset monitor | Asserts low when VOUT falls below 90% of 3.3V; requires external pullup for system reset signaling. |
| MODE | Operation mode select | Ground/floating = skip mode (1.1µA IQ); tied to BIAS = forced-PWM (constant 2.1MHz). |
| BIAS | Internal 5V LDO output | Powers internal circuitry; requires 1µF ceramic cap to AGND; not for external loading. |
| OUT/FB | Output sense / feedback | Fixed-output version: connects directly to VOUT; bypassed with ≥22µF X7R ceramic to PGND. |
| EN | Enable input | Logic-compatible with 3.5V–36V SUP; drives low to disable; 0.1µA input current minimizes leakage impact. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external switches; RDS(ON) = 2.2Ω (HS) / 1.2Ω (LS) at 200mA enables >85% efficiency at 300mA. |
| Current-mode control with load-line architecture | Reduces required output capacitance by positioning VOUT slightly high at no load and decreasing linearly with load - cuts typical COUT by 30–50%. |
| 5.4ms internal soft-start | Prevents inrush current and output overshoot during startup; eliminates need for external timing components. |
| 97% max duty cycle + 1.1µA skip-mode IQ | Enables regulation down to 3.4V input while maintaining <1.5µA total system standby draw - critical for battery-sensitive modules. |
| AEC-Q100 Grade-1 qualification | Validated for -40°C to +125°C operation with thermal shutdown at +175°C and 15°C hysteresis - ensures reliability in engine bay environments. |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Rail |
|---|---|
Use Scenario: Regulating 3.3V supply for microcontroller, LIN transceiver, and door-lock actuator drivers in a centralized BCM unit. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load buck regulator delivering up to 300mA with cold-crank hold-up and RESET supervision. Use Value: Maintains 3.3V output during 3.5V cold-crank events and asserts RESET if voltage dips below 2.97V - preventing MCU lockup. | Use Scenario: Providing clean, low-noise 3.3V rail for audio codec, display interface, and touch controller in head-unit designs. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter operating in forced-PWM mode (MODE = BIAS) to suppress switching noise in sensitive analog sections. Use Value: 2.1MHz fixed frequency avoids AM radio band (530–1710kHz); integrated slope compensation ensures stable transient response across temperature. |
| ADAS Camera ECU | Telematics Control Unit (TCU) |
Use Scenario: Powering image sensor interface and ISP core in rear-view or surround-view camera modules mounted near bumpers. IC Role / Device Role / Timing Role: Compact, thermally robust buck converter handling wide VIN transients (load dump to 42V) and ambient extremes (-40°C to +105°C). Use Value: Exposed-pad µMAX package achieves low θJA; 42V tolerance and thermal shutdown prevent damage during ISO 7637-2 pulse 5a/b events. | Use Scenario: Generating 3.3V for cellular modem, GNSS receiver, and CAN FD controller in always-connected vehicle telematics units. IC Role / Device Role / Timing Role: Low-IQ buck regulator in skip mode during sleep states, transitioning to forced-PWM during data transmission bursts. Use Value: 1.1µA quiescent current extends battery backup runtime; RESET signal synchronizes modem wake-up with valid VOUT. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3.0V–17V input; 3.3V fixed; 3A output; 17µA IQ; no AEC-Q100; QFN-16 package | Higher current, wider temp range not validated; lacks RESET, cold-crank support, and 42V tolerance | Use only in non-automotive industrial or consumer applications where 300mA is insufficient and AEC-Q100 is unnecessary. |
| LM61480QRNLRQ1 | 3.0V–36V input; adjustable output; 8A output; 15µA IQ; AEC-Q100 Grade 1; 16-pin WQFN | Higher current, larger footprint, no fixed 3.3V variant; requires external feedback resistors and compensation | Select when >300mA is needed and design flexibility justifies added BOM cost and layout area - not a drop-in replacement. |
Compared with TPS62130ARGTR and LM61480QRNLRQ1, MAX16956AUBB/V+ delivers optimal fit for space-constrained, AEC-Q100-compliant 300mA automotive rails - combining fixed 3.3V output, 1.1µA IQ, cold-crank capability, and integrated RESET in a 3mm × 3mm package without requiring external compensation.
Availability
MAX16956AUBB/V+ is available at Aetrix Electronics and suitable for automotive body ECUs, point-of-load regulation, and distributed DC power systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MAX16956AUBB/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.
The MAX16956 belongs to Analog Devices' automotive-qualified power management portfolio, designed specifically for harsh-environment DC-DC conversion in body electronics, ADAS, and infotainment systems with emphasis on low IQ, cold-crank resilience, and EMI robustness.
FAQ
What is the output voltage tolerance of the MAX16956AUBB/V+ over temperature and load?
The MAX16956AUBB/V+ delivers a fixed 3.3V output with ±3% accuracy across -40°C to +125°C and 0–300mA load range, as specified in the Electrical Characteristics table (VOUT,3.3V min/max = 3.2V/3.4V). This tolerance includes line, load, and temperature effects - no external trimming is required.
Does the MAX16956AUBB/V+ require external compensation components?
No, the MAX16956AUBB/V+ integrates full current-mode compensation, including slope compensation and transconductance error amplifier. Its fixed 3.3V output version needs no external feedback resistors or compensation network - only standard input/output capacitors and an inductor are required for operation.
How does the RESET output of the MAX16956AUBB/V+ behave during startup and fault conditions?
The MAX16956AUBB/V+ RESET output remains low until VOUT rises above 92% of 3.3V (≈3.04V), then goes high-impedance (open-drain). It pulls low again if VOUT falls below 90% (≈2.97V), with 12µs debounce. During short-circuit or UVLO, RESET stays low until soft-start completes successfully.
Can the MAX16956AUBB/V+ operate with input voltage below 3.5V?
No - the MAX16956AUBB/V+ has a minimum operating input voltage of 3.5V per Absolute Maximum Ratings and Electrical Characteristics. Below this, undervoltage lockout disables switching. However, it supports 3.5V cold-crank inputs and tolerates up to 42V transient surges without damage.
Is the MAX16956AUBB/V+ pin-compatible with other variants in the MAX16956 family?
Yes - all MAX16956 variants (AUBA/V+, AUBB/V+, AUBC/V+, etc.) share identical 10-pin µMAX-EP pinout and footprint (U10E+3). Only the internal configuration (fixed 5V/3.3V, adjustable, spread-spectrum on/off) differs; no PCB redesign is needed when substituting within the same package code.
MAX16956AUBB/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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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
MAX16956AUBB/V+ FAQ
1.How can I place an order for MAX16956AUBB/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16956AUBB/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 MAX16956AUBB/V+ reliable?
The price and inventory of MAX16956AUBB/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16956AUBB/V+ is usually 5 days.
3.What payment methods are accepted for MAX16956AUBB/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16956AUBB/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16956AUBB/V+?
MAX16956AUBB/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16956AUBB/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 MAX16956AUBB/V+?
For technical support, including MAX16956AUBB/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16956AUBB/V+ requirements.
6.How does Aetrix verify that MAX16956AUBB/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16956AUBB/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 MAX16956AUBB/V+ meets industry standards.
7.What is the process for return or replacement of MAX16956AUBB/V+?
All MAX16956AUBB/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16956AUBB/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 MAX16956AUBB/V+ part is unused and in its original packaging.
Return procedure for MAX16956AUBB/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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