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Analog Devices Inc./Maxim Integrated MAX16956AUBE/V+T
- Part No.:
- MAX16956AUBE/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16956AUBE/V+T.pdf
- Description:
- IC REG BUCK 3.3V 300MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
MAX16956AUBE/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 body ECUs.
For engineers reviewing the MAX16956AUBE/V+T datasheet, MAX16956AUBE/V+T pinout, MAX16956AUBE/V+T application, or MAX16956AUBE/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 cold-crank and load-dump resilient power rails.
Technical Context
The MAX16956AUBE/V+T implements current-mode PWM control with integrated slope compensation and cycle-by-cycle peak-current limiting. It uses internal high-side current sensing and an integrated transconductance error amplifier, eliminating external compensation components.
It supports dual operating modes: forced-PWM (constant 2.1MHz) and skip mode (ultra-low 1.1µA IQ), with MODE pin logic-selectable behavior and factory-enabled spread-spectrum modulation (±6% around 2.1MHz) to reduce radiated EMI - confirmed for the /V+ variant per Selector Guide.
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), enabling direct replacement of legacy 3.3V LDOs in automotive modules. |
| Input Voltage Range | 3.5V to 36V (42V tolerant), supporting wide automotive battery transients including cold-crank (down to 3.5V) and load-dump (up to 42V). |
| Switching Frequency | 2.1MHz (±6% spread-spectrum enabled), allowing use of compact 10µH inductors and <22µF ceramic output capacitors while avoiding AM-band interference. |
| Quiescent Current | 1.1µA in skip mode (no load), meeting OEM requirements for always-on ECU sleep-state power budgets. |
| Duty Cycle Max | 97%, enabling stable 3.3V regulation even when input drops to ~3.4V - critical for cold-crank operation below nominal battery voltage. |
| Protection Features | Integrated short-circuit recovery (15-cycle limit + 13.4ms retry), thermal shutdown at +175°C (+15°C hysteresis), and undervoltage lockout at 3.2V (rising). |
| Package & Temp | 10-pin µMAX (3mm × 3mm, exposed pad), rated for −40°C to +125°C ambient and qualified to AEC-Q100 Grade 1. |
Pinout & Package
MAX16956AUBE/V+T is housed in a 10-pin µMAX package (U10E+3 outline) with exposed thermal pad (EP), optimized for automotive PCB layouts requiring low θJA (77.6°C/W) and robust ground separation between analog (AGND) and power (PGND) domains.
| 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 near dropout. |
| SUP | Main input supply (3.5V–36V) | Accepts automotive battery rail directly; requires ≥4.7µF ceramic decoupling adjacent to pin for 2.1MHz noise suppression. |
| LX | Switch node connecting internal HS/LS FETs | High dv/dt node; must be routed short and away from sensitive analog traces to minimize coupling into AGND/OUT/FB. |
| PGND | Power ground return for HS/LS FETs and input/output caps | Must connect to EP and output capacitor cathode in star topology; separate from AGND except at single point under COUT. |
| AGND | Analog reference ground for feedback and bias circuitry | Connects to BIAS capacitor and OUT/FB; isolated from PGND except at COUT return to prevent noise injection into regulation loop. |
| RESET | Open-drain reset monitor output | Asserts low when VOUT falls below 90% of 3.3V (≈2.97V); requires external pullup for system MCU reset signaling. |
| MODE | Operating mode select (skip vs. forced-PWM) | Pulled down internally (1MΩ); tie to GND for skip mode (1.1µA IQ) or to BIAS for forced-PWM (constant 2.1MHz). |
| BIAS | Internal 5V LDO output for internal logic | Supplies internal circuitry; requires 1µF ceramic cap to AGND; not intended for external loading. |
| OUT/FB | Output voltage sense (fixed) or feedback input (adjustable) | For MAX16956AUBE/V+T (fixed 3.3V), functions as regulated output node; bypassed with ≥22µF X7R ceramic to PGND. |
| EN | Enable input (SUP-voltage compatible) | Active-high; logic threshold 2.4V min; allows direct connection to KL30, CAN transceiver INH, or microcontroller GPIO. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated HS/LS MOSFETs | Reduces BOM count by eliminating 2 external switches and associated gate drivers; RDS(ON) = 2.2Ω (HS) / 1.2Ω (LS) enables 300mA continuous output without external heatsinking. |
| Spread-spectrum modulation | Factory-enabled ±6% frequency dithering centered at 2.1MHz reduces peak EMI emissions by >10dB, easing compliance with CISPR 25 Class 5 automotive radiated emissions limits. |
| Load-line architecture | Intentionally offsets no-load output voltage slightly positive (within 3.3V ±3%) to increase undershoot margin during load steps - enabling reduction of output capacitance by up to 30% versus conventional regulators. |
| 97% max duty cycle | Permits regulation down to VIN ≈ 3.4V at 3.3V output, sustaining ECU functionality during engine cranking when battery sags below 6V. |
| AEC-Q100 Grade 1 | Qualified for −40°C to +125°C operation with full electrical testing across temperature, ensuring reliability in under-hood automotive environments. |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Rail |
|---|---|
Use Scenario: Powering microcontrollers, CAN transceivers, and sensor interfaces in door modules, seat controllers, and lighting ECUs. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator converting raw battery voltage to clean, regulated supply with cold-crank resilience. Use Value: 1.1µA skip-mode IQ extends battery life in parked vehicle scenarios; RESET signal enables MCU watchdog coordination during brownout events. |
Use Scenario: Supplying image sensor and ISP core voltage in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: Compact, thermally robust 3.3V buck converter handling load-dump transients (42V) and wide ambient temperature swings. Use Value: 3mm × 3mm µMAX package fits tight camera PCB real estate; spread-spectrum operation prevents switching noise from corrupting analog video signals. |
| Telematics Control Unit (TCU) | Electronic Parking Brake (EPB) Actuator |
Use Scenario: Generating stable 3.3V rail for LTE modem, GNSS receiver, and secure MCU in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Always-on power stage supporting low-power LTE sleep modes and fast wake-up response. Use Value: Ultra-low 1.1µA quiescent current meets OEM 100µA total module sleep budget; EN pin compatibility with KL30 simplifies ignition-synchronized enable sequencing. |
Use Scenario: Providing fault-tolerant 3.3V supply to motor drivers and position sensors in fail-operational parking brake systems. IC Role / Device Role / Timing Role: Safety-relevant power converter with short-circuit recovery, thermal shutdown, and RESET monitoring for ASIL-B subsystems. Use Value: Integrated cycle-by-cycle current limiting and 13.4ms retry delay prevent thermal runaway during actuator stall; AEC-Q100 qualification supports functional safety documentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QWRNXTQ1 | 4.5V–36V input, 3.3V fixed, 800mA output, 2.1MHz, no spread-spectrum, 15µA IQ in FPWM | Higher output current but higher light-load IQ; lacks factory spread-spectrum - requires external EMI filtering for CISPR 25 compliance | Select when >300mA load headroom is required and board space permits added filter components. |
| TPS62933-Q1 | 3V–36V input, 3.3V fixed, 300mA, 2.2MHz, 1.2µA IQ in DCM, no spread-spectrum, smaller 2mm × 2mm QFN | Lower IQ than MAX16956AUBE/V+T in DCM mode but no built-in spread-spectrum; limited cold-crank capability (min VIN = 3V, no 97% duty cycle spec) | Select for space-constrained designs where cold-crank margin is less critical and EMI is managed via layout/filtering. |
Compared with LM61480QWRNXTQ1 and TPS62933-Q1, the MAX16956AUBE/V+T uniquely combines AEC-Q100 Grade 1, factory spread-spectrum, 97% duty cycle, and 1.1µA IQ - making it the only option qualified for cost-sensitive, EMI-critical, cold-crank-resilient 300mA automotive rails without external EMI mitigation.
Availability
MAX16956AUBE/V+T is available at Aetrix Electronics and suitable for automotive body ECUs, ADAS camera power rails, telematics control units, electronic parking brake actuators, and distributed DC power systems requiring stable component supply across extended temperature and transient conditions.
Supply support for MAX16956AUBE/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 digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and connectivity solutions.
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 MAX16956AUBE/V+T over temperature and load?
The MAX16956AUBE/V+T delivers a fixed 3.3V output with ±3% accuracy across −40°C to +125°C ambient temperature and 0–300mA load range, as specified in the Electrical Characteristics table (VOUT,3.3V = 3.2V to 3.4V). This tolerance includes line, load, and temperature effects - no additional derating is required for automotive design validation.
Does the MAX16956AUBE/V+T support true 100% duty cycle operation?
The MAX16956AUBE/V+T supports up to 97% maximum duty cycle, enabling regulation down to approximately 3.4V input for 3.3V output - sufficient for automotive cold-crank but not true 100% duty cycle. It does not include a linear pass-through mode; below dropout, output collapses gracefully without latch-up or damage.
Is spread-spectrum modulation enabled on the MAX16956AUBE/V+T, and can it be disabled?
Yes, spread-spectrum modulation (±6% around 2.1MHz) is factory-enabled on the MAX16956AUBE/V+T, as confirmed in Table 2 (Selector Guide) for all /V+ variants. It cannot be disabled via pins or registers - the feature is hardwired and active whenever the device operates in normal switching mode.
What is the recommended input capacitor configuration for the MAX16956AUBE/V+T?
Analog Devices specifies a minimum 4.7µF ceramic capacitor from SUP to PGND, placed immediately adjacent to the SUP pin. A second 0.1µF ceramic capacitor (BST-to-LX) is required for bootstrap operation. Total RMS input current rating must exceed ILOAD(MAX)/2 = 150mA to ensure <10°C self-heating under worst-case conditions.
How does the RESET output of the MAX16956AUBE/V+T behave during startup and fault conditions?
The RESET output of the MAX16956AUBE/V+T remains low until VOUT rises above 92% of 3.3V (≈3.04V), then goes high-impedance (requires external pullup). It asserts low again if VOUT falls below 90% (≈2.97V), with 12µs debounce. During soft-start failure or short-circuit, RESET pulses low for 13.4ms before retry - providing clear fault signaling to host MCUs.
MAX16956AUBE/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
MAX16956AUBE/V+T FAQ
1.How can I place an order for MAX16956AUBE/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16956AUBE/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 MAX16956AUBE/V+T reliable?
The price and inventory of MAX16956AUBE/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 MAX16956AUBE/V+T is usually 5 days.
3.What payment methods are accepted for MAX16956AUBE/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16956AUBE/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16956AUBE/V+T?
MAX16956AUBE/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16956AUBE/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 MAX16956AUBE/V+T?
For technical support, including MAX16956AUBE/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16956AUBE/V+T requirements.
6.How does Aetrix verify that MAX16956AUBE/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16956AUBE/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 MAX16956AUBE/V+T meets industry standards.
7.What is the process for return or replacement of MAX16956AUBE/V+T?
All MAX16956AUBE/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16956AUBE/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 MAX16956AUBE/V+T part is unused and in its original packaging.
Return procedure for MAX16956AUBE/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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