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Analog Devices Inc./Maxim Integrated MAX16975BAEE+TCFY
- Part No.:
- MAX16975BAEE+TCFY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX16975BAEE+TCFY.pdf
- Description:
- IC REG BUCK ADJ/1V 1.2A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,589
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Product details
Overview
MAX16975BAEE+TCFY from Maxim Integrated is an automotive-grade 1.2A synchronous step-down DC-DC 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–1MHz resistor-programmable switching frequency, and operates across –40°C to +125°C for engine control unit (ECU) and ADAS camera power rails.
For engineers reviewing the MAX16975BAEE+TCFY datasheet, MAX16975BAEE+TCFY pinout, MAX16975BAEE+TCFY application, or MAX16975BAEE+TCFY equivalent, key selection criteria include cold-crank robustness (94% duty cycle), 42V transient tolerance, programmable reset threshold via RESETI, capacitor-adjustable reset timeout via CRES, and thermal shutdown with automatic recovery at +175°C.
Technical Context
This current-mode buck controller uses internal compensation and a transconductance error amplifier (gm = 1000 µS) referenced to 1.0V FB input. Its oscillator supports both resistor programming (RFOSC) and external synchronization (FSYNC), with acquisition within one clock cycle and ±10% frequency margin requirement.
The device implements dropout operation with dynamic BST capacitor refresh logic-forcing 35% off-time every fourth cycle when high-side switch conducts >3.65 consecutive cycles-and integrates a 5V BIAS LDO that auto-switches between internal regulation and OUT supply depending on VOUT level (3V–5.5V range).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 28V continuous; withstands 42V transients-enables direct battery connection in 12V/24V automotive systems. |
| Output Current | 1.2A continuous; 1.5A–2.0A current limit-supports microcontroller, sensor, and CAN transceiver loads without external boost. |
| Quiescent Current | 45µA in skip mode, 9µA in shutdown-meets ISO 16750-2 sleep-mode current requirements for always-on modules. |
| Switching Frequency | 220kHz–1.0MHz, resistor- or FSYNC-programmable-allows EMI optimization and inductor size reduction (e.g., 10µH @ 400kHz). |
| Output Voltage | Pin-selectable 5V fixed or 1V–10V adjustable via FB divider-eliminates external resistors for 5V rail; supports diverse SoC I/O domains. |
| Reset Function | Adjustable threshold (via RESETI resistive divider) and capacitor-timed timeout (via CRES)-ensures deterministic MCU boot sequencing under brownout. |
| Thermal Protection | Thermal shutdown at +175°C with +15°C hysteresis-prevents latch-up during sustained overload or poor heatsinking. |
Pinout & Package
MAX16975BAEE+TCFY is housed in a thermally enhanced 16-pin QSOP-EP package (5.0mm × 6.2mm, 0.635mm pitch) with exposed pad (EP) connected to GND for improved thermal dissipation (θJA = 44°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CRES | Analog reset timer current source | Sources 10µA (typ) to external capacitor; sets RES deassertion delay after VOUT regulation recovery. |
| FOSC | Oscillator frequency programming node | Connects to GND via resistor (e.g., 61.9kΩ → 400kHz); enables EMI tuning without changing layout. |
| FSYNC | External clock synchronization input | Accepts 10% faster external clock; eliminates beat frequencies in multi-rail automotive systems. |
| COMP | Error amplifier output | Interface point for Type II/III compensation network; stabilizes loop response across temperature and load. |
| FB | Feedback voltage sense input | 1.0V reference input; connects to resistive divider for adjustable output or directly to BIAS for fixed 5V. |
| OUT | Power output node | Delivers regulated voltage; supplies internal circuitry when VOUT = 3V–5.5V, reducing bias current consumption. |
| LX | Switch node | Connects to inductor and Schottky diode cathode; requires low-ESR ceramic BST capacitor (0.1µF) between LX and BST. |
| EN | Enable control input | 3.3V–42V compatible; asserts internal regulator above 2.2V, shuts down below 0.8V-directly drivable from KL30 or CAN INH. |
| RES | Open-drain active-low reset output | Asserts low when VOUT falls below programmed threshold; pulls to GND with 5mA sink capability. |
| RESETI | Reset threshold programming input | Accepts resistive divider from OUT/GND; sets RES activation at 93% of VOUT (1.25V internal reference). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side switch | 1.2A rated MOSFET with 300–550mΩ RDS(on); eliminates external FET and gate driver, reducing BOM count and footprint. |
| Low-IQ skip mode | 45µA no-load current at 5V output-extends battery life in parked vehicle scenarios without compromising startup time. |
| Automotive temperature range | –40°C to +125°C junction operation-qualified per AEC-Q100 Grade 1; validated for under-hood ECU and front-camera applications. |
| Power-good monitoring | Adjustable RES timing and threshold-enables precise sequencing with microcontrollers requiring stable VCC before release from reset. |
| Cold-crank support | 94% maximum duty cycle during 3.5V input events-maintains regulated output during engine start, preventing ECU brownout resets. |
Applications
| Engine Control Unit (ECU) Power | ADAS Camera Module |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN transceiver, and analog sensors in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying core logic and interface peripherals; provides synchronized power-good signal for MCU boot. Use Value: 42V transient tolerance prevents damage during load-dump events; 45µA IQ meets ISO 16750-2 Class D sleep current limits. | Use Scenario: Supplies image sensor, ISP, and serializer in forward-facing driver-assistance cameras. IC Role / Device Role / Timing Role: Adjustable 1.2V/1.8V/3.3V output rail generator; delivers stable voltage despite wide VIN swing during cold-crank. Use Value: Resistor-programmable fSW allows EMI filtering at 2.1MHz (harmonic suppression); programmable reset ensures clean sensor initialization. |
| Infotainment System PMIC Core | Body Control Module (BCM) |
Use Scenario: Generates intermediate 5V rail feeding secondary DC-DC converters for display, audio, and connectivity ICs. IC Role / Device Role / Timing Role: High-efficiency pre-regulator enabling compact downstream buck/boost stages; supports FSYNC for system-wide clock alignment. Use Value: 220kHz–1MHz frequency range permits optimal trade-off between inductor size (e.g., 4.7µH @ 1MHz) and light-load efficiency. | Use Scenario: Powers door module microcontrollers, LIN transceivers, and LED drivers in distributed body electronics. IC Role / Device Role / Timing Role: Always-on 5V supply with programmable reset timeout; maintains MCU watchdog supervision during ignition-off periods. Use Value: Adjustable CRES timeout (e.g., 100ms with 10nF) prevents spurious resets during brief battery dips; 9µA shutdown current extends parasitic drain life. |
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 | 4.5V–36V input, 3.5A output, 15µA IQ, no integrated BIAS LDO | Higher current capacity but requires external bias supply; lacks CRES-programmable reset timeout | Select when >1.2A load or lower IQ is critical; verify external bias design for MCU sequencing. |
| TPS62130A-Q1 | 3V–17V input, 3A output, 17µA IQ, fixed 5V/adjustable output, no cold-crank duty-cycle extension | Lower max input voltage; no 94% cold-crank mode or 42V transient rating | Use only in 12V-only systems with benign transients; not suitable for diesel or commercial vehicle platforms. |
Compared with LM61480-Q1 and TPS62130A-Q1, MAX16975BAEE+TCFY uniquely combines 28V max input with 42V transient tolerance, integrated BIAS LDO auto-switching, and capacitor-programmable reset timeout-making it optimal for cost-sensitive, space-constrained ECU and camera modules requiring guaranteed cold-crank operation.
Availability
MAX16975BAEE+TCFY is available at Aetrix Electronics and suitable for automotive ECU, ADAS camera, and body control module designs requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX16975BAEE+TCFY 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.
MAX16975BAEE+TCFY belongs to Maxim's automotive power management portfolio, engineered specifically for harsh-environment DC-DC conversion in engine compartments and ADAS subsystems where cold-crank resilience and ultra-low quiescent current are mandatory.
FAQ
What is the maximum input voltage transient tolerance for MAX16975BAEE+TCFY?
MAX16975BAEE+TCFY tolerates input transients up to +42V, as specified in its Absolute Maximum Ratings table. This rating applies to short-duration spikes such as load dump events in 12V automotive systems. The device remains functional during these transients without latch-up or permanent damage, provided the duration stays within JEDEC JESD22-A114 limits. MAX16975BAEE+TCFY achieves this via internal clamp structures and robust gate oxide design.
How does MAX16975BAEE+TCFY handle cold-crank conditions below 6V input?
During cold-crank, MAX16975BAEE+TCFY sustains 94% duty cycle to maintain output regulation down to 3.5V input. This is implemented through dynamic duty-cycle extension logic that overrides normal PWM control when VIN drops near VOUT. The device also activates internal 100mA load at sixth clock cycle to ensure BST capacitor refresh, preventing gate-drive failure. MAX16975BAEE+TCFY exits cold-crank mode automatically once VIN rises above dropout threshold.
Can MAX16975BAEE+TCFY generate a 3.3V output, and what is the FB reference voltage?
Yes, MAX16975BAEE+TCFY supports 3.3V output using an external resistive divider from OUT to FB to GND. The FB pin has a precise 1.000V (±1.5%) internal reference, so R1/R2 values are calculated as R1 = R2 × (3.3V/1.0V − 1). At TA = +25°C, VFB tolerance is ±1%, tightening to ±1.5% over –40°C to +125°C. MAX16975BAEE+TCFY's FB input current is only 20nA, minimizing divider error.
What is the purpose of the CRES pin on MAX16975BAEE+TCFY, and how is it used?
CRES on MAX16975BAEE+TCFY sources 10µA (typ) to charge an external capacitor to ground, setting the reset timeout period before RES deasserts after VOUT regulation recovery. Timeout = (1.13V × C)/10µA, where C is in farads. For example, a 10nF capacitor yields ~1.13ms timeout. CRES must be left unconnected for minimum delay. MAX16975BAEE+TCFY uses this to prevent premature MCU release from reset during slow-start or transient recovery.
Does MAX16975BAEE+TCFY require an external bootstrap diode?
No, MAX16975BAEE+TCFY integrates an internal bootstrap diode, eliminating the need for an external component between BST and SUPSW. The device only requires a 0.1µF ceramic capacitor between BST and LX, placed as close as possible to the pins. This integration reduces BOM count, PCB area, and potential failure points-critical for automotive reliability. MAX16975BAEE+TCFY's internal diode is sized to support the 2.5mA BST current needed during dropout operation.
MAX16975BAEE+TCFY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX16975BAEE+TCFY FAQ
1.How can I place an order for MAX16975BAEE+TCFY through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16975BAEE+TCFY 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+TCFY reliable?
The price and inventory of MAX16975BAEE+TCFY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16975BAEE+TCFY is usually 5 days.
3.What payment methods are accepted for MAX16975BAEE+TCFY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16975BAEE+TCFY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16975BAEE+TCFY?
MAX16975BAEE+TCFY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16975BAEE+TCFY 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+TCFY?
For technical support, including MAX16975BAEE+TCFY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16975BAEE+TCFY requirements.
6.How does Aetrix verify that MAX16975BAEE+TCFY is sourced from the original manufacturer or authorized distributors?
All MAX16975BAEE+TCFY 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+TCFY meets industry standards.
7.What is the process for return or replacement of MAX16975BAEE+TCFY?
All MAX16975BAEE+TCFY units undergo pre-shipment inspection (PSI). If there is an issue with MAX16975BAEE+TCFY, 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+TCFY part is unused and in its original packaging.
Return procedure for MAX16975BAEE+TCFY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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