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Analog Devices Inc./Maxim Integrated MAX16975BAEE/V+CG
- Part No.:
- MAX16975BAEE/V+CG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX16975BAEE/V+CG.pdf
- Description:
- IC REG BUCK ADJ/1V 1.2A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,021
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Product details
Overview
MAX16975BAEE/V+CG from Maxim Integrated is a 1.2A automotive-grade current-mode step-down converter with integrated high-side MOSFET, operating from 3.5V to 28V input and delivering fixed 5V or adjustable 1V–10V output. It features 45µA skip-mode quiescent current, 220kHz–1.0MHz resistor-programmable switching frequency, and operates across –40°C to +125°C for engine control units and ADAS power rails.
For engineers reviewing the MAX16975BAEE/V+CG datasheet, MAX16975BAEE/V+CG pinout, MAX16975BAEE/V+CG application, or MAX16975BAEE/V+CG equivalent, key selection criteria include cold-crank tolerance (42V transient), programmable reset threshold via RESETI, capacitor-adjustable reset timeout via CRES, and thermal shutdown with automatic recovery at +175°C junction temperature.
Technical Context
The MAX16975BAEE/V+CG implements constant-frequency current-mode control with internal 1.2A high-side switch and integrated bootstrap diode. Its oscillator supports both resistor programming (FOSC pin) and external synchronization (FSYNC pin), enabling EMI-sensitive automotive designs to align switching with system clocks.
It integrates a 5V linear regulator (BIAS) that powers internal circuitry and transitions to OUT supply when VOUT is between 3V and 5.5V - reducing quiescent current by up to 50µA. The device maintains 94% duty cycle during cold-crank events and employs an internal load (~100mA) to refresh the BST capacitor under no-load dropout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 28V - supports full automotive battery range including cold-crank dips and load-dump transients up to 42V. |
| Output Current | 1.2A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in automotive ECUs. |
| Quiescent Current | 45µA in skip mode - enables always-on subsystems (e.g., body control modules) to meet ISO 16750-2 sleep current requirements. |
| Switching Frequency | 220kHz to 1.0MHz - adjustable via FOSC resistor or synchronized externally via FSYNC for noise mitigation. |
| Output Voltage Options | Fixed 5V (FB tied to BIAS) or 1V–10V adjustable (via FB resistive divider) - supports diverse SoC and peripheral voltage rails. |
| Reset Function | Adjustable threshold (via RESETI resistive divider) and capacitor-programmable timeout (via CRES) - ensures reliable MCU boot sequencing under brownout. |
| Thermal Protection | Thermal shutdown at +175°C with +15°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking. |
Pinout & Package
MAX16975BAEE/V+CG is housed in a 16-pin QSOP-EP (exposed pad) package optimized for automotive thermal performance, with qJA = 44°C/W and qJC = 6°C/W per JEDEC JESD51-7 on a four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CRES | Analog reset timer node | Sources 10µA (typ) to external capacitor; sets RES assertion delay after startup or regulation loss. |
| FOSC | Oscillator frequency programming input | Resistor-to-GND sets switching frequency from 220kHz to 1.0MHz; enables EMI optimization. |
| FSYNC | External clock synchronization input | Accepts clock signal 10% faster than internal frequency; eliminates beat frequencies in multi-rail systems. |
| COMP | Error amplifier output | Connects to compensation network (RC from COMP to GND); stabilizes loop response across line/load/temperature. |
| FB | Feedback input | Direct connection to BIAS selects fixed 5V; resistive divider from OUT to GND sets 1V–10V output with ±1% reference accuracy. |
| OUT | Power output node | Delivers regulated voltage; supplies internal circuitry when VOUT = 3V–5.5V, reducing bias regulator current draw. |
| BIAS | Linear regulator output | 5.0V ±3% LDO output; powers internal logic; bypassed with 1µF ceramic capacitor near pin. |
| BST | Bootstrap supply for high-side driver | Requires 0.1µF capacitor between BST and LX; critical for gate drive integrity during 100% duty-cycle operation. |
| SUP / SUPSW | Internal LDO and high-side switch supply inputs | Both pins connected together and decoupled with 4.7µF capacitors; SUP powers bias regulator, SUPSW powers switch driver. |
| LX | Switch node | Connects to inductor and Schottky catch diode; voltage swings from GND to VIN; requires low-inductance layout. |
| EN | Enable input | 3.3V–42V compatible; logic-high >2.2V enables, logic-low <0.8V disables; draws only 10nA leakage. |
| RES | Open-drain active-low reset output | Asserts low when VOUT falls below programmed threshold; debounced for 25µs; sinks 5mA min. |
| RESETI | Reset threshold programming input | Accepts resistive divider from OUT to GND; sets RES activation point with 1.25V internal reference. |
| GND | Power and signal ground | Primary return path; exposed pad (EP) must be soldered to large contiguous copper ground plane for thermal management. |
| I.C. | Internally connected | Pin 4 is internally bonded; must be connected to GND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| 42V input transient tolerance | Withstands automotive load-dump events without external TVS, simplifying front-end protection design. |
| Adjustable power-good timing | CRES capacitor sets precise reset timeout independent of output voltage, enabling deterministic boot sequencing for safety-critical MCUs. | Integrated boost diode | Eliminates external bootstrap diode, reducing BOM count and PCB area while maintaining robust gate drive under dropout. |
| 94% cold-crank duty cycle | Maintains regulation during engine cranking (as low as ~4.5V battery), ensuring uninterrupted power to ADAS vision processors. |
| Less than 10µA shutdown current | Enables ultra-low-power sleep modes in telematics and gateway modules compliant with UNECE R100 Class 3 requirements. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powers 3.3V microcontroller, CAN transceiver, and analog sensor interface in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying core logic and communication peripherals; provides power-good signal for MCU reset coordination. Use Value: 45µA skip-mode current and –40°C to +125°C rating ensure compliance with ISO 16750-2 and AEC-Q100 Grade 0 requirements. | Use Scenario: Supplies 1.25V/1.8V rails to image signal processors (ISPs) and radar MMICs in forward-facing camera and surround-view systems. IC Role / Device Role / Timing Role: Adjustable-output buck converter delivering stable low-voltage rails; uses FSYNC to synchronize switching with camera frame timing. Use Value: Resistor-programmable frequency avoids interference with high-speed video data lanes and reduces conducted EMI in compact camera housings. |
| Automotive Body Control Module (BCM) | Infotainment Head Unit Power Supply |
Use Scenario: Provides always-on 5V rail for door module microcontrollers and LIN transceivers, surviving extended vehicle-off battery drain. IC Role / Device Role / Timing Role: Low-quiescent-current step-down converter with programmable reset; monitors VOUT to assert RES during battery sag. Use Value: 9µA shutdown current and adjustable reset threshold enable BCM to meet OEM "parasitic draw" limits (<20mA total). | Use Scenario: Generates 5V and 3.3V intermediate rails from 12V battery for SoC, DDR memory, and display drivers in head units. IC Role / Device Role / Timing Role: Dual-rail power source using two MAX16975BAEE/V+CG devices - one fixed 5V, one adjustable 3.3V - with coordinated power-good sequencing. Use Value: Thermal shutdown with automatic recovery prevents permanent fault lockout during high-ambient cabin temperatures (>85°C). |
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 |
|---|---|---|---|
| LM61480QQRGTRQ1 | 4.5V–36V input, 8A output, 2.1MHz fixed frequency; no adjustable reset or CRES timeout. | Better suited for high-current infotainment SoCs; lacks programmable reset timing needed for MCU boot reliability. | Select when higher output current and smaller inductors are required; avoid when deterministic reset sequencing is mandatory. |
| TPS62933QPWPRQ1 | 3V–18V input, 3A output, 1.8MHz/2.5MHz dual-frequency option; 15µA IQ but no cold-crank 94% duty cycle. | Optimized for low-noise ADAS sensor rails; insufficient input range for full 12V automotive battery swing including load dump. | Select for noise-sensitive analog rails where input stays within 3V–18V; avoid for direct battery-connected applications. |
Compared with LM61480QQRGTRQ1 and TPS62933QPWPRQ1, the MAX16975BAEE/V+CG uniquely combines cold-crank robustness (94% duty cycle), capacitor-programmable reset timeout, and ultra-low 45µA skip-mode IQ - making it optimal for safety-critical, always-on automotive subsystems requiring deterministic power sequencing.
Availability
MAX16975BAEE/V+CG is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera power, body control module, infotainment head unit, and telematics gateway applications requiring stable component supply across extended temperature and qualification lifecycles.
Supply support for MAX16975BAEE/V+CG 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.
The MAX16975BAEE/V+CG belongs to Maxim's automotive power management portfolio, engineered specifically for ASIL-B compatible power rails in engine, chassis, and ADAS domains with emphasis on cold-crank survival, low IQ, and functional safety-aware monitoring features.
FAQ
What is the maximum input voltage transient tolerance of the MAX16975BAEE/V+CG?
The MAX16975BAEE/V+CG withstands input transients up to +42V, meeting ISO 7637-2 Pulse 5a load-dump requirements without external TVS diodes. This rating applies across the full –40°C to +125°C operating temperature range and is validated per Maxim's automotive qualification testing protocol.
How does the MAX16975BAEE/V+CG implement cold-crank operation below 6V input?
The MAX16975BAEE/V+CG maintains up to 94% duty cycle during cold-crank events, allowing regulation down to ~4.5V input. It achieves this via internal pass-device control and a dedicated dropout refresh algorithm that activates an internal ~100mA load to sustain BST capacitor voltage when inductor current is insufficient.
Can the MAX16975BAEE/V+CG generate a 3.3V output, and what is the output voltage accuracy?
Yes, the MAX16975BAEE/V+CG delivers 3.3V using an external resistive divider from OUT to FB to GND. Output voltage accuracy is ±1% over temperature (–40°C to +125°C) due to the 1.000V ±0.5% internal FB reference and low FB input current (20nA), minimizing divider error.
What is the purpose of the CRES pin on the MAX16975BAEE/V+CG, and how is it configured?
The CRES pin on the MAX16975BAEE/V+CG sources 10µA (typ) to charge an external capacitor to ground, setting the reset timeout period before RES deasserts after startup or regulation recovery. Timeout = (1.13V × C) / 10µA, where C is in farads - enabling precise, temperature-stable sequencing delays independent of output voltage.
Does the MAX16975BAEE/V+CG support external clock synchronization, and what are the timing requirements?
Yes, the MAX16975BAEE/V+CG accepts external synchronization via the FSYNC pin. The external clock must be 10% higher in frequency than the internal oscillator (set by RFOSC) and exhibit clean edges; acquisition occurs within one cycle, enabling deterministic phase alignment in multi-converter systems.
MAX16975BAEE/V+CG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
MAX16975BAEE/V+CG FAQ
1.How can I place an order for MAX16975BAEE/V+CG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16975BAEE/V+CG 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 MAX16975BAEE/V+CG reliable?
The price and inventory of MAX16975BAEE/V+CG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16975BAEE/V+CG is usually 5 days.
3.What payment methods are accepted for MAX16975BAEE/V+CG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16975BAEE/V+CG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16975BAEE/V+CG?
MAX16975BAEE/V+CG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16975BAEE/V+CG 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 MAX16975BAEE/V+CG?
For technical support, including MAX16975BAEE/V+CG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16975BAEE/V+CG requirements.
6.How does Aetrix verify that MAX16975BAEE/V+CG is sourced from the original manufacturer or authorized distributors?
All MAX16975BAEE/V+CG 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 MAX16975BAEE/V+CG meets industry standards.
7.What is the process for return or replacement of MAX16975BAEE/V+CG?
All MAX16975BAEE/V+CG units undergo pre-shipment inspection (PSI). If there is an issue with MAX16975BAEE/V+CG, 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 MAX16975BAEE/V+CG part is unused and in its original packaging.
Return procedure for MAX16975BAEE/V+CG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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