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Analog Devices Inc./Maxim Integrated MAX16975BAEE/V+T
- Part No.:
- MAX16975BAEE/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX16975BAEE/V+T.pdf
- Description:
- IC REG BUCK ADJ/1V 1.2A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,809
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Product details
Overview
MAX16975BAEE/V+T from Maxim Integrated is a 28V, 1.2A automotive step-down 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. It operates across -40°C to +125°C and supports cold-crank (94% duty cycle) in automotive power systems.
For engineers reviewing the MAX16975BAEE/V+T datasheet, MAX16975BAEE/V+T pinout, MAX16975BAEE/V+T application, or MAX16975BAEE/V+T equivalent, key selection criteria include its 42V transient tolerance, programmable reset threshold via RESETI, capacitor-adjustable reset timeout via CRES, and compatibility with 3.3V logic-level enable inputs in battery-supplied environments.
Technical Context
This current-mode buck regulator uses an internal 1.2A high-side switch with 300–550mΩ on-resistance and integrates a 5V BIAS linear regulator that auto-switches between self-supply and output-derived supply depending on VOUT level (3V–5.5V range). Its oscillator supports resistor-programmed frequency or external synchronization via FSYNC with ±10% acquisition window.
The device implements dropout-aware BST capacitor refresh logic-forcing periodic LX pull-down during sustained high-duty-cycle operation-and features dual-mode protection: cycle-by-cycle current limiting plus thermal shutdown at +175°C with +15°C hysteresis, and overvoltage lockout at +12% VOUT deviation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 28V continuous; withstands 42V transients-enables direct connection to automotive battery without pre-regulator. |
| Output Current | 1.2A continuous; 1.5–2.0A current limit-supports microcontroller cores, CAN transceivers, and sensor clusters. |
| Quiescent Current | 45µA in skip mode, 9µA in shutdown-meets ISO 16750-2 sleep-mode current requirements for always-on ECUs. |
| Switching Frequency | 220kHz–1.0MHz, resistor- or clock-synchronized-allows EMI tuning and inductor size optimization (e.g., 10µH @ 400kHz). |
| Output Voltage | Pin-selectable 5V fixed or 1V–10V adjustable via FB divider-supports 3.3V, 5V, and 12V rail generation from single IC. |
| Reset Function | Adjustable threshold (via RESETI resistive divider) and capacitor-timed timeout (via CRES)-ensures deterministic MCU boot sequencing under brownout. |
| Thermal Protection | +175°C shutdown with +15°C hysteresis; QSOP-EP package achieves 44°C/W θJA-enables 1.2A operation at +105°C ambient without forced air. |
Pinout & Package
MAX16975BAEE/V+T is packaged in a 16-pin thermally enhanced QSOP-EP (exposed pad), optimized for automotive PCB layouts requiring low thermal resistance (θJA = 44°C/W) and high reliability under vibration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CRES | Analog reset timer node | Sources 10µA to external capacitor; sets RES assertion delay after startup or dropout recovery. |
| FOSC | Oscillator frequency programming input | Connects to GND via resistor (e.g., 61.9kΩ → 400kHz); enables EMI compliance tuning. |
| FSYNC | External clock synchronization input | Accepts 3.3V/5V logic; locks internal oscillator to external source within ±10% period margin. |
| COMP | Error amplifier output | Interface point for Type II/III compensation network-stabilizes loop across line/load/temp variations. |
| FB | Feedback voltage sense input | 1.0V reference; connects to resistive divider for adjustable output or ties directly to BIAS for 5V fixed mode. |
| OUT | Power output node | Delivers regulated voltage; powers internal circuitry when VOUT = 3–5.5V, reducing quiescent current by ~50µA. |
| BIAS | Internal LDO output | 5.0V ±3%, supplies control circuitry; bypassed with 1µF ceramic-critical for stable startup and light-load behavior. |
| BST | Bootstrap supply for high-side gate driver | Requires 0.1µF capacitor to LX; internal refresh algorithm maintains gate drive during dropout (e.g., cold-crank). |
| SUP / SUPSW | Main supply inputs | SUP powers bias LDO; SUPSW powers high-side switch; both require 4.7µF ceramic decoupling near pins. |
| LX | Switch node | Connects to inductor and Schottky catch diode; voltage swings from GND to VIN-layout critical for EMI and efficiency. |
| EN | Enable input | 3.3V–42V compatible; 0.8V/2.2V thresholds with 0.2V hysteresis-directly drivable from KL30 or CAN transceiver INH. |
| RES | Open-drain active-low reset output | Asserts when VOUT falls below programmed threshold (e.g., 93% of setpoint); pulls low with 5mA sink capability. |
| RESETI | Reset threshold programming input | Accepts resistive divider from OUT/GND; sets internal comparator reference to 1.25V (typ) for precise brownout detection. |
| GND | Signal and power ground | Primary return path; EP must be soldered to large copper pour for thermal performance-no standalone ground connection. |
| I.C. | Internally connected | Must be tied to GND; not functional-internal bond wire connection to substrate. |
Key Features
| Feature | Design Value |
|---|---|
| 42V input transient tolerance | Withstands load-dump events per ISO 7637-2 Pulse 5a without external TVS-reduces BOM count and board space. |
| Capacitor-programmable reset timeout | CRES current source (10µA typ) enables precise, temperature-stable reset hold-off timing independent of VOUT regulation status. |
| Auto-switching BIAS supply | Transfers internal power from BIAS to OUT when VOUT = 3–5.5V-cuts no-load IQ by up to 50µA versus fixed-LDO architectures. |
| Dropout-aware BST refresh | Forces LX pull-down every ~7.65 cycles at 220kHz to recharge BST cap-maintains gate drive integrity during cold-crank (VIN ≈ VOUT). |
| Adjustable soft-start time | 4ms @ 400kHz, 1.6ms @ 1.0MHz-prevents inrush current while enabling fast wake-up in start-stop systems. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and display interface in head-unit with variable battery input (6V–16V) and cold-crank immunity. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator with programmable reset for controlled SoC boot and brownout recovery. Use Value: 45µA skip-mode IQ extends battery runtime during vehicle sleep; 42V tolerance eliminates need for upstream TVS. |
Use Scenario: Supplies image sensor, ISP, and serializer in rear-view camera exposed to engine bay temperature extremes. IC Role / Device Role / Timing Role: High-reliability 3.3V rail generator with thermal shutdown and cold-crank support down to 4.5V input. Use Value: -40°C to +125°C operation ensures functionality at full spec; QSOP-EP package sustains 1.2A at +105°C ambient. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
|
Use Scenario: Generates 5V for microcontroller, LIN transceivers, and LED drivers in door module with intermittent loads. IC Role / Device Role / Timing Role: Always-on buck converter with EN driven by KL30; RES monitors VOUT to prevent MCU lockup during battery sag. Use Value: Adjustable RESETI threshold (e.g., 4.65V) aligns with MCU VDD min spec; 9µA shutdown IQ meets OEM sleep-current targets. |
Use Scenario: Powers cellular modem, GNSS receiver, and CAN controller in connected vehicle gateway with CAN FD interface. IC Role / Device Role / Timing Role: Main 5V supply synchronized to system clock via FSYNC-reduces conducted EMI coupling into RF sections. Use Value: 1.0MHz sync capability enables clean spectral separation from 2.4GHz Wi-Fi/Bluetooth bands; 5V fixed mode simplifies layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | Higher 3.5A rating, 2.1MHz max frequency, no integrated BIAS LDO-requires external 5V bias supply. | Targets higher-power ADAS domains (e.g., radar); lacks capacitor-programmable reset timeout and cold-crank optimized duty cycle. | Select when >1.2A output or >1MHz switching is required; avoid if BIAS integration or precise reset timing is critical. |
| TPS62933-Q1 | Lower 3V min input, 3A rating, 1.8V–5.5V adjustable output, 1.8MHz max frequency-no 42V transient rating or cold-crank support. | Suited for infotainment SoCs with tight voltage margins; cannot replace MAX16975BAEE/V+T in battery-connected front-end rails. | Choose for compact, high-efficiency point-of-load conversion where input stays above 5V; not suitable for direct-battery applications. |
Compared with LM61480-Q1 and TPS62933-Q1, MAX16975BAEE/V+T uniquely combines 42V transient tolerance, cold-crank 94% duty cycle, integrated BIAS LDO with auto-switching, and capacitor-adjustable reset timeout-making it optimal for primary automotive power rails where robustness and deterministic sequencing are mandatory.
Availability
MAX16975BAEE/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX16975BAEE/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.
The MAX16975 product line delivers high-reliability, AEC-Q100 qualified DC-DC converters optimized for automotive battery-connected applications-including cold-crank survival, load-dump immunity, and extended temperature operation.
FAQ
What is the maximum input voltage transient the MAX16975BAEE/V+T can withstand?
The MAX16975BAEE/V+T withstands 42V input transients per ISO 7637-2 Pulse 5a, enabling direct connection to automotive battery without external TVS diodes. This rating is validated across the full -40°C to +125°C operating range and applies to both SUP and SUPSW pins. Absolute maximum ratings specify -0.3V to +45V on SUP/SUPSW relative to GND, confirming robustness against load-dump events.
How does the MAX16975BAEE/V+T handle cold-crank conditions?
The MAX16975BAEE/V+T maintains 94% duty cycle during cold-crank (low VIN) to sustain output regulation down to ~4.5V input. Its internal BST capacitor refresh algorithm forces periodic LX pull-down to recharge the bootstrap cap, ensuring gate drive integrity. Combined with 45µA skip-mode IQ, this enables reliable operation during engine start when battery voltage dips to 3.5V–6V for several hundred milliseconds.
Can the MAX16975BAEE/V+T generate a 3.3V output, and how is it configured?
Yes, the MAX16975BAEE/V+T generates 3.3V using the adjustable output mode: connect FB to a resistive divider between OUT and GND with R1 = 100kΩ and R2 = 30.1kΩ (yielding VOUT = 1.0V × (1 + R1/R2) = 3.3V). The 1.0V FB reference ensures ±0.5% accuracy over temperature, and the BIAS LDO automatically switches to OUT supply when VOUT = 3–5.5V, reducing quiescent current by ~50µA.
What is the purpose of the CRES pin on the MAX16975BAEE/V+T, and how is it used?
The CRES pin on the MAX16975BAEE/V+T sources a precise 10µA (typ) current to charge an external capacitor, setting the reset timeout period before RES deasserts after startup or dropout recovery. Timeout = (1.13V × C)/10µA, where C is in farads. For example, a 100nF capacitor yields ~11.3ms delay-ensuring microcontrollers complete initialization before release from reset.
Does the MAX16975BAEE/V+T support synchronization to an external clock, and what are the requirements?
Yes, the MAX16975BAEE/V+T synchronizes to an external clock applied to the FSYNC pin. The external signal must have a frequency 10% higher than the internal oscillator frequency (set by RFOSC) for reliable acquisition. FSYNC accepts 3.3V or 5V logic levels, with thresholds at 0.4V (low) and 1.4V (high), and includes a 500kΩ internal pulldown for noise immunity during clock absence.
MAX16975BAEE/V+T 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:
- Active
- 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+T FAQ
1.How can I place an order for MAX16975BAEE/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16975BAEE/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 MAX16975BAEE/V+T reliable?
The price and inventory of MAX16975BAEE/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 MAX16975BAEE/V+T is usually 5 days.
3.What payment methods are accepted for MAX16975BAEE/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16975BAEE/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16975BAEE/V+T?
MAX16975BAEE/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16975BAEE/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 MAX16975BAEE/V+T?
For technical support, including MAX16975BAEE/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16975BAEE/V+T requirements.
6.How does Aetrix verify that MAX16975BAEE/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16975BAEE/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 MAX16975BAEE/V+T meets industry standards.
7.What is the process for return or replacement of MAX16975BAEE/V+T?
All MAX16975BAEE/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16975BAEE/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 MAX16975BAEE/V+T part is unused and in its original packaging.
Return procedure for MAX16975BAEE/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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