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Analog Devices Inc./Maxim Integrated MAX16956AUBA/V+
- Part No.:
- MAX16956AUBA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16956AUBA/V+.pdf
- Description:
- IC REG BUCK 5V 300MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
MAX16956AUBA/V+ from Analog Devices is a 5.0V fixed-output, 300mA synchronous buck converter with integrated high-side/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 MAX16956AUBA/V+ datasheet, MAX16956AUBA/V+ pinout, MAX16956AUBA/V+ application, or MAX16956AUBA/V+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and EMI performance, and real-world selection guidance for 3.5V–36V input systems requiring ultra-low IQ and 97% max duty cycle operation.
Technical Context
The MAX16956AUBA/V+ implements current-mode PWM control with integrated slope compensation and load-line architecture to reduce output capacitance requirements while maintaining ±2% output voltage accuracy across 0–300mA load and -40°C to +125°C. Its internal 5V BIAS regulator powers control circuitry and enables direct connection to automotive battery rails.
It supports dual operating modes via the MODE pin: forced-PWM (for predictable EMI filtering) and skip mode (for 1.1µA no-load IQ), with RESET monitoring at 90–94% VOUT thresholds and built-in short-circuit/thermal protection triggering at 175°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% (4.9V–5.2V) over full temperature and load range - ensures stable MCU core supply without external feedback components. |
| Input Voltage Range | 3.5V to 36V, with 42V transient tolerance - supports automotive cold-crank (down to 3.5V) and load-dump (up to 42V) without external protection. |
| Max Output Current | 300mA continuous - sufficient for powering microcontrollers, CAN transceivers, and sensors in body control modules. |
| Quiescent Current | 1.1µA in skip mode (no load) - meets OEM standby power budgets for always-on automotive subsystems. |
| Switching Frequency | 2.1MHz ±6% (fixed, spread-spectrum disabled) - enables use of compact 10µH inductors and low-ESR ceramic capacitors; avoids AM band interference. |
| Duty Cycle Limit | 97% maximum - sustains regulation during deep cold-crank events where input drops near output voltage. |
| Operating Temperature | -40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted ECUs. |
| Protection Features | Current-limit (0.425–0.575A), thermal shutdown (175°C), and open-drain RESET with 12µs debounce - provides autonomous fault response without host intervention. |
Pinout & Package
MAX16956AUBA/V+ uses a 3mm × 3mm, 10-pin µMAX® package with exposed pad (U10E+3 outline, land pattern 90-0148). Thermal resistance 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 gate driver | Requires 0.1µF ceramic capacitor between BST and LX; enables efficient 100% duty-cycle capability near dropout. |
| SUP | Main input supply (3.5V–36V) | Accepts automotive battery rail directly; requires ≥4.7µF ceramic decoupling at pin for 2.1MHz noise suppression. |
| LX | Switch node connecting internal HS/LS FETs to external inductor | High dv/dt node; must be routed short and away from sensitive analog traces to minimize EMI coupling. |
| PGND | Power ground return for high-current paths | Must connect to AGND at single point under device (star ground); ties to exposed pad for thermal conduction. |
| AGND | Analog reference ground for feedback and control circuitry | Isolated from PGND except at star point; connects to CBIAS and FB/OUT network to prevent noise injection. |
| RESET | Open-drain reset monitor output | Pulls low when VOUT falls below 90% nominal; requires external pullup for system reset assertion or watchdog signaling. |
| MODE | Operating mode select (skip vs. forced-PWM) | Ground or floating → skip mode (1.1µA IQ); tied to BIAS → forced-PWM (constant 2.1MHz, higher light-load IQ). |
| BIAS | Internal 5V LDO output | Supplies internal logic; must be bypassed with 1µF ceramic to AGND; not intended for external loading. |
| OUT/FB | Fixed-output voltage sense / adjustable feedback input | For MAX16956AUBA/V+: connects directly to VOUT; senses 5V regulation with 0.02µA input bias current. |
| EN | Enable input compatible with 3.5V–36V logic levels | Drives low to disable IC; high threshold 2.4V, low threshold 0.4V; draws only 0.1µA - simplifies direct battery connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous MOSFETs | Eliminates external high-side/low-side drivers and reduces BOM count by 4–6 components versus discrete solutions. |
| Load-line output voltage positioning | Reduces required output capacitance by up to 30% through controlled load regulation - lowers cost and PCB area. |
| Spread-spectrum disabled (A/B variants) | Delivers deterministic 2.1MHz switching for predictable EMI filter design - preferred when spectral peaks must be avoided. |
| Fixed 5.4ms soft-start ramp | Prevents inrush current and output overshoot during power-up; eliminates need for external soft-start timing components. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use including HTOL, TC, and ESD testing - removes qualification burden from Tier 1 designers. |
| Exposed thermal pad (EP) | Enables 5°C/W junction-to-case thermal path - allows reliable 300mA operation at +125°C ambient with minimal copper area. |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Rail |
|---|---|
|
Use Scenario: Powers microcontroller, LIN transceiver, and LED drivers in door module with battery input ranging from 3.5V (cold-crank) to 42V (load dump). IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator delivering regulated supply with RESET supervision and thermal fault reporting. Use Value: 1.1µA quiescent current extends battery life in key-off state; 97% duty cycle maintains regulation during engine start. |
Use Scenario: Supplies 5V to audio DSP and display interface ICs in center-stack infotainment unit with stringent EMI limits. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter operating in forced-PWM mode to ensure consistent 2.1MHz switching for EMI filter tuning. Use Value: Integrated current-mode control and slope compensation eliminate external compensation, reducing layout sensitivity and validation time. |
| ADAS Camera Power Supply | Telematics Control Unit (TCU) |
|
Use Scenario: Provides clean 5V rail to image sensor and ISP in rear-view camera module mounted near exhaust. IC Role / Device Role / Timing Role: High-reliability buck regulator with RESET monitoring and -40°C to +125°C operation for under-hood placement. Use Value: AEC-Q100 qualification and 175°C thermal shutdown ensure fail-safe behavior in high-ambient environments. |
Use Scenario: Generates 5V for cellular modem, GNSS receiver, and CAN controller in vehicle telematics gateway. IC Role / Device Role / Timing Role: Input-tolerant buck converter enabling direct connection to KL30 battery rail without pre-regulator or TVS. Use Value: 42V transient tolerance and integrated short-circuit protection reduce need for external surge suppression components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20004AATP/V+ (5V) | Higher 600mA output, 2.2MHz fSW, 2.5µA IQ in skip mode, same µMAX-10 package | Supports higher-current loads (e.g., multi-rail PMIC front-end); less suitable for ultra-low-IQ standby-critical designs | Select MAX20004AATP/V+ when >300mA load headroom or tighter output ripple is required; MAX16956AUBA/V+ remains optimal for IQ-constrained modules. |
| TPS62933RTER (5V) | 3A output, 1.8–6.5V input, 25µA IQ, 3mm × 2mm WSON-10 package, no AEC-Q100 | Targets industrial/medical portable devices; lacks automotive qualification and cold-crank support | Choose TPS62933RTER only for non-automotive applications needing higher current; MAX16956AUBA/V+ is mandatory for AEC-Q100-compliant automotive designs. |
Compared with MAX20004AATP/V+, MAX16956AUBA/V+ offers 2.3× lower quiescent current for extended key-off battery life but trades off 2× output current headroom; versus TPS62933RTER, it provides guaranteed automotive qualification and cold-crank operation at the expense of peak current capability.
Availability
MAX16956AUBA/V+ is available at Aetrix Electronics and suitable for automotive body ECUs, point-of-load power delivery, and distributed DC power systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.
Supply support for MAX16956AUBA/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 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, ADAS, and infotainment systems where cold-crank resilience and ultra-low standby power are critical.
FAQ
What is the exact output voltage tolerance of MAX16956AUBA/V+ across temperature and load?
The MAX16956AUBA/V+ delivers 5.0V output with ±2% tolerance (4.9V to 5.2V) over the full -40°C to +125°C operating temperature range and 0mA to 300mA load current, as specified in the Electrical Characteristics table under "VOUT,5V" parameter. This tight regulation is achieved using internal feedback and does not require external resistor dividers.
Does MAX16956AUBA/V+ support spread-spectrum frequency modulation?
No, MAX16956AUBA/V+ does not include spread-spectrum frequency modulation. Per the Selector Guide, only MAX16956AUBD/V+, MAX16956AUBE/V+, and MAX16956AUBF/V+ variants have spread-spectrum enabled; the "A" and "B" suffixes (including MAX16956AUBA/V+) are explicitly marked "Off" for this feature.
What is the recommended input capacitor configuration for MAX16956AUBA/V+?
The MAX16956AUBA/V+ requires two input capacitors: a minimum 4.7µF ceramic capacitor (CIN1) placed directly at the SUP pin for bulk energy storage, and a 0.1µF ceramic capacitor (CIN2) for high-frequency decoupling. Both must be rated for ≥36V and placed with minimal trace length to suppress 2.1MHz switching noise.
How does the RESET output function on MAX16956AUBA/V+?
The RESET output on MAX16956AUBA/V+ is an open-drain signal that goes low when VOUT falls below 90% of nominal (4.5V) and releases (high-impedance) when VOUT rises above 92% (4.6V), with 12µs internal debounce. An external pullup resistor is mandatory to generate a logic-high reset signal for downstream processors.
Can MAX16956AUBA/V+ operate with input voltage below 3.5V?
No, MAX16956AUBA/V+ has a minimum operating input voltage of 3.5V as defined in Absolute Maximum Ratings and Electrical Characteristics. Below this, undervoltage lockout disables switching; the device will not regulate or sustain output, even if the input briefly dips during cold-crank transients - design margin must ensure VSUP ≥ 3.5V at all times.
MAX16956AUBA/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):
- 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+ FAQ
1.How can I place an order for MAX16956AUBA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16956AUBA/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 MAX16956AUBA/V+ reliable?
The price and inventory of MAX16956AUBA/V+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX16956AUBA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16956AUBA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16956AUBA/V+?
MAX16956AUBA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16956AUBA/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 MAX16956AUBA/V+?
For technical support, including MAX16956AUBA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16956AUBA/V+ requirements.
6.How does Aetrix verify that MAX16956AUBA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16956AUBA/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 MAX16956AUBA/V+ meets industry standards.
7.What is the process for return or replacement of MAX16956AUBA/V+?
All MAX16956AUBA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16956AUBA/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 MAX16956AUBA/V+ part is unused and in its original packaging.
Return procedure for MAX16956AUBA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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