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Analog Devices Inc./Maxim Integrated MAX16975AAEE/V+T
- Part No.:
- MAX16975AAEE/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MAX16975AAEE/V+T.pdf
- Description:
- IC REG BUCK ADJ/5V 1.2A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,679
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Product details
Overview
MAX16975AAEE/V+T from Maxim Integrated is a 28V, 1.2A automotive step-down DC-DC converter with integrated high-side MOSFET, 45µA skip-mode quiescent current, adjustable 220kHz–1.0MHz switching frequency, and pin-selectable 5V fixed or 1V–10V adjustable output voltage. It operates across -40°C to +125°C and supports cold-crank conditions in automotive power systems.
For engineers reviewing the MAX16975AAEE/V+T datasheet, MAX16975AAEE/V+T pinout, MAX16975AAEE/V+T application, or MAX16975AAEE/V+T equivalent, key selection considerations include its 42V transient tolerance, programmable reset threshold via RESETI, capacitor-adjustable reset timeout (CRES), internal BIAS LDO, and compatibility with 3.3V logic-level enable inputs in harsh automotive environments.
Technical Context
This current-mode buck controller uses an internal 1.2A high-side switch with cycle-by-cycle current limiting and implements dropout operation with dynamic duty-cycle extension up to 94% during cold-crank events. Its transconductance error amplifier (COMP) interfaces with external RC compensation networks for stable regulation across wide load and input ranges.
The device integrates a 5V BIAS linear regulator that powers internal circuitry and auto-switches to OUT when VOUT is between 3V and 5.5V; it also features synchronous FSYNC input for clock alignment and a dedicated CRES pin sourcing 10µA to set reset timeout with ±5% accuracy over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 28V - supports full automotive battery range including start-stop and load-dump conditions. |
| Output Current | 1.2A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in ADAS modules. |
| Quiescent Current | 45µA in skip mode - enables always-on functionality without excessive battery drain during vehicle sleep modes. |
| Switching Frequency | 220kHz to 1.0MHz, resistor-programmable - allows optimization of inductor size, EMI filtering, and efficiency trade-offs. |
| Output Voltage Options | Fixed 5V or adjustable 1V–10V - eliminates external feedback resistors for standard rails or enables custom supply voltages. |
| Thermal Shutdown | +175°C with +15°C hysteresis - ensures safe recovery after overheating without requiring system-level intervention. |
| Reset Threshold Accuracy | ±1.5% at FB reference (1.0V) - guarantees precise microcontroller brown-out detection across temperature. |
Pinout & Package
MAX16975AAEE/V+T is housed in a 16-pin QSOP package with exposed pad (QSOP-EP), optimized for thermal performance in automotive under-hood applications. The exposed pad must be soldered to a large-area ground plane but cannot serve as the sole GND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CRES | Analog reset timer current source | Sources 10µA (typ) to external capacitor; sets RES assertion delay after startup or fault recovery. |
| FOSC | Oscillator frequency programming node | Connects to GND via resistor (e.g., 61.9kΩ for 400kHz); determines switching frequency and influences EMI profile. |
| FSYNC | External clock synchronization input | Accepts 10% faster external clock; enables deterministic timing in multi-rail systems to avoid beat frequencies. |
| COMP | Error amplifier output | Drives external Type-II/III compensation network; stability depends on pole-zero placement relative to crossover. |
| FB | Feedback voltage sensing input | Monitors resistive divider output; regulates to 1.0V reference - enables 5V fixed output when tied to BIAS. |
| OUT | Power output node | Delivers regulated voltage to load; supplies internal circuitry when VOUT = 3–5.5V, reducing quiescent current by ~50µA. |
| BIAS | Internal 5V LDO output | Bypassed with 1µF ceramic cap; powers control logic and gate drivers; shuts down when OUT is in regulation. |
| BST | Bootstrap supply for high-side driver | Requires 0.1µF capacitor between BST and LX; sustains gate drive during high-duty-cycle operation. |
| SUP / SUPSW | Main supply inputs | SUP powers internal LDO; SUPSW powers high-side switch; both require 4.7µF input capacitors and must be shorted. |
| LX | Switch node | Connects to inductor and Schottky diode cathode; carries high dv/dt and peak currents - requires tight layout. |
| EN | Enable input | 3.3V-compatible logic input; 0.8V low threshold and 2.2V high threshold allow direct connection to KL30 or CAN INH lines. |
| RES | Open-drain active-low reset output | Asserts low when VOUT falls below programmed threshold; debounced for 25µs to reject noise-induced glitches. |
| RESETI | Reset threshold programming input | Accepts resistive divider from OUT/GND; sets RES activation level using internal 1.25V reference (±2% typical). |
| GND | Signal and power ground | Primary return path for analog and power circuits; EP must be connected to same ground plane for thermal integrity. |
| I.C. | Internally connected | Pin 4 is internally bonded - must be connected to GND per layout guidelines to ensure proper thermal and electrical behavior. |
Key Features
| Feature | Design Value |
|---|---|
| 42V input transient tolerance | Withstands ISO 7637-2 pulse 5a (load dump) without external TVS, reducing BOM count and board space. |
| Adjustable power-good timing | CRES-based timeout ensures RES remains asserted until output stabilizes - prevents premature MCU wake-up during cold-crank. |
| Internal boost diode | Eliminates need for external bootstrap diode, simplifying layout and improving reliability in high-vibration environments. |
| Less than 10µA shutdown current | Enables ultra-low-power deep-sleep states in telematics and infotainment head units with strict battery leakage budgets. |
| 3.3V logic-level EN input | Direct interface with automotive microcontrollers and CAN transceivers without level-shifting components. |
| Overvoltage protection at +12% | Halts switching if VOUT exceeds setpoint by >12%, protecting downstream loads during feedback loop failure. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powers SoC, display driver, and audio codec in automotive head unit with variable battery voltage (6V–16V) and cold-crank dips to 3.5V. IC Role / Device Role / Timing Role: Primary 5V/1.2A buck regulator delivering stable rail during engine cranking and stop-start cycles. Use Value: 45µA skip-mode current extends battery life during vehicle sleep; 94% effective duty cycle maintains regulation down to 3.5V input. |
Use Scenario: Supplies image sensor, ISP, and serializer in forward-facing camera module operating in ambient temperatures from -40°C to +105°C. IC Role / Device Role / Timing Role: High-efficiency step-down converter with programmable reset to coordinate sensor initialization and frame sync timing. Use Value: Adjustable reset threshold (via RESETI) ensures clean power-up sequencing before MIPI CSI-2 link activation. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Generates 3.3V rail for microcontroller, LIN transceiver, and EEPROM in door module with intermittent load profiles. IC Role / Device Role / Timing Role: Adjustable-output buck converter enabling single design for multiple BCM variants (3.3V/5V/12V outputs). Use Value: 1V–10V output adjustability avoids redesign when migrating between 3.3V MCUs and 5V legacy peripherals. |
Use Scenario: Powers cellular modem, GNSS receiver, and secure element in TCU requiring always-on capability and low standby consumption. IC Role / Device Role / Timing Role: Low-IQ buck regulator with shutdown current <10µA supporting LTE/Wi-Fi coexistence and OTA update scheduling. Use Value: Internal BIAS LDO reduces external component count while maintaining fast wake-up response (<4ms soft-start). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | Higher 3.5A output current; fixed 2.1MHz switching frequency; no CRES-based reset timeout. | Better suited for higher-power domains (e.g., domain controllers); lacks programmable reset timing for precise MCU sequencing. | Select when >1.2A load current or tighter EMI control is required; not drop-in due to different pinout and compensation scheme. |
| TPS62933-Q1 | Lower 450mA output; 1.8V–6.0V input; 15µA IQ; no cold-crank support or 42V transient rating. | Targeted at low-power always-on subsystems (e.g., radar wake-up receivers); unsuitable for main battery-fed rails. | Choose only for ultra-low-power auxiliary rails where 28V input and cold-crank operation are unnecessary. |
Compared with LM61480-Q1 and TPS62933-Q1, MAX16975AAEE/V+T uniquely balances 1.2A output, 42V transient tolerance, programmable reset timing, and sub-50µA light-load IQ - making it optimal for mid-power automotive ECUs requiring robust cold-crank behavior and precise power sequencing.
Availability
MAX16975AAEE/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and telematics systems requiring stable component supply across extended temperature and qualification lifecycles.
Supply support for MAX16975AAEE/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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
MAX16975AAEE/V+T belongs to Maxim's automotive-grade power management portfolio, engineered specifically for ASIL-B compatible systems requiring high reliability, cold-crank resilience, and low quiescent current in harsh environments.
FAQ
What is the maximum input voltage transient tolerance of the MAX16975AAEE/V+T?
The MAX16975AAEE/V+T withstands input transients up to +42V, complying with ISO 7637-2 Pulse 5a (load dump) requirements without external protection components. This rating is verified across the full -40°C to +125°C operating range and applies to both SUP and SUPSW pins, enabling robust front-end power conversion in 12V and 24V automotive systems.
How does the MAX16975AAEE/V+T implement cold-crank operation below 6V input?
The MAX16975AAEE/V+T maintains regulation during cold-crank events by dynamically extending the duty cycle to 94% when input drops to 3.5V. It achieves this through internal dropout logic that forces periodic off-time to refresh the BST capacitor while sustaining gate drive - ensuring uninterrupted 5V output even during engine cranking in sub-zero conditions.
Can the MAX16975AAEE/V+T generate a 3.3V output, and how is it configured?
Yes, the MAX16975AAEE/V+T supports 3.3V output via external resistive divider from OUT to FB and GND. With FB referenced to the internal 1.0V bandgap, a 100kΩ (R1) and 33.2kΩ (R2) divider sets VOUT = 1.0V × (1 + R1/R2) ≈ 3.3V. The device regulates precisely to this value with ±0.5% line/load regulation and <1% temperature drift over -40°C to +125°C.
What is the function of the CRES pin on the MAX16975AAEE/V+T, and how is it used?
The CRES pin on the MAX16975AAEE/V+T sources a precise 10µA (typ) current to charge an external capacitor, defining the reset timeout period before RES deasserts after startup or fault recovery. For example, a 100nF capacitor yields ~11.3ms timeout (1.13V / 10µA), ensuring microcontrollers remain held in reset until output voltage stabilizes within specification.
Does the MAX16975AAEE/V+T require an external bootstrap diode?
No, the MAX16975AAEE/V+T integrates an internal bootstrap diode, eliminating the need for an external component between BST and SUPSW. This simplifies PCB layout, improves reliability in high-vibration automotive environments, and reduces bill-of-materials cost - while maintaining full functionality of the high-side gate driver across all operating conditions.
MAX16975AAEE/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 1V (5V)
- Voltage - Output (Max):
- 10V
- Current - Output:
- 1.2A
- Frequency - Switching:
- 220kHz ~ 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP-EP
MAX16975AAEE/V+T FAQ
1.How can I place an order for MAX16975AAEE/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16975AAEE/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 MAX16975AAEE/V+T reliable?
The price and inventory of MAX16975AAEE/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 MAX16975AAEE/V+T is usually 5 days.
3.What payment methods are accepted for MAX16975AAEE/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16975AAEE/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16975AAEE/V+T?
MAX16975AAEE/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16975AAEE/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 MAX16975AAEE/V+T?
For technical support, including MAX16975AAEE/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16975AAEE/V+T requirements.
6.How does Aetrix verify that MAX16975AAEE/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16975AAEE/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 MAX16975AAEE/V+T meets industry standards.
7.What is the process for return or replacement of MAX16975AAEE/V+T?
All MAX16975AAEE/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16975AAEE/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 MAX16975AAEE/V+T part is unused and in its original packaging.
Return procedure for MAX16975AAEE/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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