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Analog Devices Inc./Maxim Integrated MAX16956AUBA+T
- Part No.:
- MAX16956AUBA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16956AUBA+T.pdf
- Description:
- IC REG BUCK 5V 300MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,117
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Product details
Overview
MAX16956AUBA+T from Analog Devices is a 36V, 300mA synchronous buck converter with integrated high-side and low-side MOSFETs, fixed 5V output, 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+T datasheet, MAX16956AUBA+T pinout, MAX16956AUBA+T application, or MAX16956AUBA+T equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and EMI performance, and real-world selection guidance against comparable fixed-output buck regulators.
Technical Context
The MAX16956AUBA+T employs current-mode PWM control with integrated slope compensation and cycle-by-cycle peak-current limiting, enabling stable regulation across 3.5V–36V input while maintaining 97% max duty cycle for cold-crank operation. Its internal 5V BIAS LDO powers control circuitry and supports external logic-level enable.
It features dual operating modes: forced-PWM (constant 2.1MHz) and skip mode (ultra-low 1.1µA IQ), selected via MODE pin; RESET output provides open-drain voltage monitoring with 90–92% VOUT threshold hysteresis; and it includes thermal shutdown at +175°C with +15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V (42V tolerant); supports full automotive battery range including cold-crank dips and load-dump transients. |
| Output Voltage | Fixed 5.0V ±2% (VOUT = 5V version); regulated without external feedback components. |
| Max Output Current | 300mA continuous; sufficient for microcontroller cores, CAN transceivers, and sensor interfaces in body ECUs. |
| Switching Frequency | 2.1MHz (±6% with spread-spectrum option disabled in MAX16956AUBA+T); enables compact 10µH inductors and low-ESR ceramic capacitors. |
| Quiescent Current | 1.1µA in skip mode (fixed-output versions only); meets OEM standby power budgets for always-on modules. |
| Operating Temperature | −40°C to +125°C ambient; qualified per AEC-Q100 Grade 1; junction temperature limited to +150°C. |
| Duty Cycle Max | 97%; sustains regulation during 4.5V cold-crank events without dropout in automotive systems. |
Pinout & Package
MAX16956AUBA+T is housed in a 3mm × 3mm, 10-pin µMAX® package with exposed pad (U10E+3 outline), optimized for thermal dissipation in high-density automotive PCBs. θJA = 77.6°C/W on single-layer board; θJC = 5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | High-side gate driver supply | Requires 0.1µF ceramic capacitor between BST and LX; enables efficient high-side MOSFET drive without external bootstrap diode. |
| SUP | Main IC supply input | Accepts 3.5V–36V; requires ≥4.7µF ceramic decoupling to PGND; 42V tolerant for load-dump immunity. |
| LX | Switching node | Connects to inductor; high-impedance when off; critical for EMI layout-keep trace short and shielded from analog nodes. |
| PGND | Power ground | Return path for high-current switch and input/output capacitors; must connect to AGND at single star point under device. |
| AGND | Analog ground | Reference for FB/RESET/EN/MODE; isolated from noisy PGND except at star point; improves noise immunity of regulation loop. |
| RESET | Open-drain reset monitor | Asserts low when VOUT falls below 90% nominal; requires external pullup; used for system power-good signaling. |
| MODE | Operation mode select | Ground or open = skip mode (1.1µA IQ); tied to BIAS = forced-PWM (constant 2.1MHz); internal 1MΩ pulldown. |
| BIAS | Internal 5V LDO output | Supplies internal logic; 1µF ceramic cap to AGND required; not for external loading-no current sourcing capability. |
| OUT/FB | Fixed-output voltage sense | Direct connection to 5V output; bypassed with ≥22µF X7R ceramic to PGND; no resistor divider needed. |
| EN | Enable input | Logic-compatible with 3.5V–36V; drives low to disable; supports direct connection to KL30 or CAN transceiver INH pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external power switches; RDS(ON) = 2.2Ω (HS) / 1.2Ω (LS) at 5V BIAS-reduces BOM count and layout complexity. |
| Current-mode PWM control | Provides inherent line regulation, simplified loop compensation, and cycle-by-cycle overcurrent protection without external sensing resistors. |
| Fixed 5.4ms soft-start | Prevents inrush current during startup; eliminates need for external timing components or sequencing controllers. |
| 97% max duty cycle | Enables regulation down to 4.5V input-critical for engine start scenarios where battery voltage collapses below 6V. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with thermal shutdown, short-circuit, and UVLO protection-meets automotive functional safety requirements. |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Rail |
|---|---|
|
Use Scenario: Powers MCU, LIN transceivers, and door-lock actuators in BCMs exposed to cold-crank and load-dump events. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator delivering stable rail during wide VIN transients. Use Value: 97% duty cycle maintains regulation at 4.5V input; 1.1µA skip-mode IQ extends battery life in sleep mode. |
Use Scenario: Supplies 5V to display controller and audio codec in head-unit systems requiring low EMI near AM radio band. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter with 2.1MHz switching to avoid AM interference (530–1710kHz). Use Value: Spread-spectrum disabled in MAX16956AUBA+T; fixed 2.1MHz allows predictable filtering with small LC components. |
| ADAS Camera ECU | Telematics Control Unit (TCU) |
|
Use Scenario: Provides clean 5V rail to image signal processor and SerDes interface in rear-view camera modules. IC Role / Device Role / Timing Role: Compact buck regulator with RESET output used for system power-good assertion before ISP initialization. Use Value: RESET threshold at 90–92% VOUT ensures reliable boot sequencing; AEC-Q100 qualification guarantees field reliability. |
Use Scenario: Powers cellular modem and GNSS receiver in always-connected TCU modules requiring ultra-low standby consumption. IC Role / Device Role / Timing Role: Low-IQ buck converter enabling <10µA system sleep current when paired with intelligent enable control. Use Value: 1.1µA quiescent current directly reduces total module IQ-critical for meeting OEM 100µA system-level limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QWRNXTQ1 | 3.5V–36V input, 5V fixed, 1.2MHz switching, 15µA IQ (not skip mode), QFN-16 package | Higher IQ limits use in ultra-low-power sleep modes; larger footprint than µMAX | Select when higher output current (1A) or integrated EMI filter support is required-tradeoff is size and standby power. |
| TPS62933QDBVRQ1 | 3.5V–36V input, 5V fixed, 2.1MHz, 1.2µA IQ in DCM, 8-pin SOT-563 package | Lower current rating (300mA same), but smaller SOT-563 footprint; no RESET output or BIAS LDO | Select when board space is constrained and RESET signaling is handled elsewhere; verify thermal derating at 300mA in SOT-563. |
Compared with LM61480QWRNXTQ1 and TPS62933QDBVRQ1, the MAX16956AUBA+T uniquely combines AEC-Q100 Grade 1, integrated BIAS LDO, open-drain RESET, and 1.1µA skip-mode IQ in a 3mm × 3mm µMAX package-making it optimal for space-constrained, low-IQ automotive modules requiring full fault monitoring.
Availability
MAX16956AUBA+T is available at Aetrix Electronics and suitable for automotive body ECUs, infotainment power rails, ADAS camera ECUs, and telematics control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX16956AUBA+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 digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and connectivity solutions.
The MAX16956AUBA+T belongs to Analog Devices' automotive-qualified power management portfolio, designed specifically for robust, low-IQ DC-DC conversion in harsh automotive environments-including cold-crank, load-dump, and extended temperature operation.
FAQ
What is the maximum input voltage tolerance for MAX16956AUBA+T?
The MAX16956AUBA+T supports an absolute maximum input voltage of +42V on the SUP pin, providing robust protection against automotive load-dump transients. Its operational input range is 3.5V to 36V, and it maintains regulation down to 4.5V input via 97% max duty cycle-critical for cold-crank scenarios. This 42V tolerance is explicitly specified in the Absolute Maximum Ratings table.
Does MAX16956AUBA+T include a built-in reset function, and how does it behave?
Yes, MAX16956AUBA+T features an open-drain RESET output that asserts low when the regulated 5V output falls below 90% of nominal (4.5V) and releases high when VOUT rises above 92% (4.6V), providing 2% hysteresis. An external pullup resistor is required. This signal is used for system power-good monitoring and is fully integrated-no external supervisor IC needed.
Can MAX16956AUBA+T operate in forced-PWM mode, and how is it enabled?
Yes, MAX16956AUBA+T supports forced-PWM mode, which maintains constant 2.1MHz switching regardless of load. To enable it, tie the MODE pin to the BIAS pin (5V). When MODE is grounded or left floating, the device defaults to skip mode with 1.1µA quiescent current. The internal 1MΩ pulldown on MODE ensures safe default behavior.
What package type and thermal characteristics apply to MAX16956AUBA+T?
MAX16956AUBA+T uses a 3mm × 3mm, 10-pin µMAX® package with exposed pad (U10E+3). Its thermal resistance is θJA = 77.6°C/W on single-layer board and θJC = 5°C/W. The exposed pad must be soldered to a large copper ground plane and connected to PGND at the output capacitor return for effective heat dissipation in automotive under-hood environments.
Is MAX16956AUBA+T qualified for automotive applications, and what standards does it meet?
Yes, MAX16956AUBA+T is AEC-Q100 qualified (Grade 1: −40°C to +125°C ambient), with integrated thermal shutdown (+175°C trip, +15°C hysteresis), short-circuit protection, and UVLO (3.2V rising threshold). It is designed for automotive body electronics, including BCMs and camera ECUs, and meets stringent OEM requirements for reliability under cold-crank, load-dump, and extended temperature stress.
MAX16956AUBA+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):
- 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+T FAQ
1.How can I place an order for MAX16956AUBA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16956AUBA+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 MAX16956AUBA+T reliable?
The price and inventory of MAX16956AUBA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16956AUBA+T is usually 5 days.
3.What payment methods are accepted for MAX16956AUBA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16956AUBA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16956AUBA+T?
MAX16956AUBA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16956AUBA+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 MAX16956AUBA+T?
For technical support, including MAX16956AUBA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16956AUBA+T requirements.
6.How does Aetrix verify that MAX16956AUBA+T is sourced from the original manufacturer or authorized distributors?
All MAX16956AUBA+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 MAX16956AUBA+T meets industry standards.
7.What is the process for return or replacement of MAX16956AUBA+T?
All MAX16956AUBA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16956AUBA+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 MAX16956AUBA+T part is unused and in its original packaging.
Return procedure for MAX16956AUBA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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