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Analog Devices Inc./Maxim Integrated MAX16975BAEE/V+TCG
- Part No.:
- MAX16975BAEE/V+TCG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX16975BAEE/V+TCG.pdf
- Description:
- IC REG BUCK ADJ/1V 1.2A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,197
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Product details
Overview
MAX16975BAEE/V+TCG from Maxim Integrated is a 28V, 1.2A automotive-grade current-mode 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 voltage. It delivers stable power to infotainment processors and ADAS domain controllers under cold-crank (3.5V input) and load-dump (42V transient) conditions.
For engineers reviewing the MAX16975BAEE/V+TCG datasheet, MAX16975BAEE/V+TCG pinout, MAX16975BAEE/V+TCG application, or MAX16975BAEE/V+TCG equivalent, key selection criteria include its -40°C to +125°C operation, 94% cold-crank duty cycle, programmable reset threshold via RESETI, capacitor-adjustable CRES timeout, and thermally enhanced QSOP-EP package with 44°C/W θJA.
Technical Context
The MAX16975BAEE/V+TCG implements constant-frequency current-mode control with internal 1.2A high-side switch and integrated bootstrap diode. Its oscillator supports resistor-programmed frequency (220kHz–1.0MHz) and external synchronization via FSYNC with ±10% acquisition window.
It features dual power-supply architecture: BIAS linear regulator (5V, 5mA) powers internal circuitry until VOUT reaches regulation (3V–5.5V), then switches to OUT-derived supply; SUP/SUPSW inputs tolerate 42V transients and support independent decoupling for noise isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 28V - supports full automotive battery range including cold-crank (3.5V) and nominal 12V/24V systems |
| Output Current | 1.2A continuous - sufficient for powering single-core microcontrollers or low-power SoCs in body electronics |
| Quiescent Current | 45µA in skip mode - enables >10-year battery standby in always-on vehicle modules |
| Switching Frequency | 220kHz to 1.0MHz - adjustable via FOSC resistor; higher frequencies reduce inductor size but increase switching losses |
| Output Voltage | Fixed 5V or adjustable 1V–10V - pin-strapped FB-to-BIAS for 5V; external divider for custom rails like 3.3V or 1.2V |
| Thermal Performance | θJA = 44°C/W (QSOP-EP) - enables 1.2A operation at +105°C ambient without forced airflow |
| Protection Features | Cycle-by-cycle current limit, overvoltage shutdown (>12% OV), thermal shutdown at +175°C with +15°C hysteresis - ensures robust field reliability |
Pinout & Package
MAX16975BAEE/V+TCG is housed in a 16-pin thermally enhanced QSOP-EP package with exposed pad (EP) connected to GND for optimal heat dissipation. The EP must be soldered to a large contiguous copper ground plane; it is not the sole ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CRES | Analog reset timer current source | Sources 10µA to external capacitor; sets RES assertion delay after startup or dropout recovery |
| 2 FOSC | Oscillator frequency programming node | Resistor-to-GND sets switching frequency (220kHz–1.0MHz); enables EMI optimization |
| 3 FSYNC | External clock synchronization input | Accepts 10% faster external clock; eliminates beat frequencies in multi-rail systems |
| 4 I.C. | Internally connected | Must be tied to GND; no external connection or component required |
| 5 COMP | Error amplifier output | Connect Type II/III compensation network to stabilize loop response across line/load/temp |
| 6 FB | Feedback voltage sense input | Direct connection to BIAS selects 5V fixed output; resistive divider enables 1V–10V adjustment |
| 7 OUT | Power output node | Supplies internal circuitry when VOUT = 3–5.5V; pulled to GND via 50Ω during shutdown |
| 8 GND | Signal and power ground reference | Primary return path for analog and power circuits; connects to EP for thermal conduction |
| 9 BIAS | Linear regulator output | 5V/5mA LDO powers internal logic; bypassed with 1µF ceramic capacitor near pin |
| 10 BST | Bootstrap capacitor connection | 0.1µF capacitor between BST and LX enables high-side gate drive; critical for dropout operation |
| 11 SUP | Main supply input for bias regulator | 3.5–28V input; decoupled with 4.7µF capacitor; tied to SUPSW |
| 12 LX | Switch node | Connects to inductor and Schottky catch diode; high dv/dt node requiring tight layout |
| 13 SUPSW | High-side switch supply input | Separate 4.7µF decoupling from SUP improves EMI and transient response |
| 14 EN | Enable control input | 3.3V–42V compatible; logic-high >2.2V enables, logic-low <0.8V shuts down to 9µA |
| 15 RES | Open-drain active-low reset output | Asserts low when VOUT falls below RESETI threshold; requires external pull-up |
| 16 RESETI | Reset threshold programming input | Resistive divider from OUT to GND sets reset point; internal 1.25V reference enables 2.5V–4.8V thresholds |
Key Features
| Feature | Design Value |
|---|---|
| 42V input transient tolerance | Withstands ISO 7637-2 pulse 5a (load dump) without external TVS, reducing BOM cost and board space |
| Adjustable power-good timing | CRES capacitor sets RES deassertion delay post-startup, enabling precise sequencing with downstream MCUs |
| 94% cold-crank duty cycle | Maintains regulation down to 3.5V input by extending on-time, critical for engine start scenarios |
| Internal boost diode | Eliminates external bootstrap diode, simplifying layout and improving reliability in high-vibration environments |
| Less than 10µA shutdown current | Enables ultra-low-power sleep modes in telematics and gateway ECUs with minimal battery drain |
Applications
| Automotive Infotainment | ADAS Camera Power |
|---|---|
|
Use Scenario: Powers display controller and audio DSP in head-unit systems operating across 6V–16V battery range with cold-crank immunity. IC Role / Device Role / Timing Role: Primary 5V buck regulator delivering 1.2A with programmable reset to coordinate MCU boot sequence. Use Value: 45µA skip-mode current extends battery life during vehicle-off state; 44°C/W θJA prevents thermal derating in sealed enclosures. |
Use Scenario: Supplies 3.3V rail to CMOS image sensor and ISP in surround-view camera modules exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Adjustable-output buck converter with CRES-timed reset ensuring clean power-up after ignition cycling. Use Value: 220kHz–1.0MHz frequency tuning allows optimal inductor selection for EMI compliance in compact camera housings. |
| Body Control Module | Automotive Gateway |
|
Use Scenario: Generates 5V for LIN transceivers and microcontroller in door module, surviving jump-start surges up to 42V. IC Role / Device Role / Timing Role: Automotive-grade step-down converter with integrated protection, eliminating need for external OVP/OTP circuits. Use Value: Cycle-by-cycle current limit and thermal shutdown with automatic recovery prevent latch-up during short-circuit events in wiring harnesses. |
Use Scenario: Provides isolated 5V supply to CAN FD transceivers and Ethernet PHY in vehicle communication gateway with strict EMC requirements. IC Role / Device Role / Timing Role: Synchronizable buck converter (FSYNC) enabling deterministic switching alignment across multiple power rails. Use Value: FSYNC input eliminates subharmonic interference between power supplies feeding high-speed serial interfaces. |
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 frequency; no CRES programmable reset timeout | Better suited for high-current ADAS SoCs; lacks adjustable reset timing for complex sequencing | Select LM61480-Q1 when >1.2A output or fixed high-frequency operation is required; MAX16975BAEE/V+TCG preferred for reset timing control |
| TPS62933-Q1 | Lower 30µA IQ; 3A output; requires external bootstrap diode; no 42V transient rating | Optimized for ultra-low-power always-on domains; needs external protection for load dump | Choose TPS62933-Q1 for battery-sensitive telematics; MAX16975BAEE/V+TCG remains superior for direct battery-connected applications |
Compared with LM61480-Q1 and TPS62933-Q1, the MAX16975BAEE/V+TCG uniquely combines 42V transient tolerance, capacitor-programmable reset timing, and thermally enhanced QSOP-EP packaging-making it the only option supporting cold-crank operation with precise power-good sequencing in space-constrained automotive modules.
Availability
MAX16975BAEE/V+TCG is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply across extended temperature and harsh electrical environments.
Supply support for MAX16975BAEE/V+TCG 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+TCG belongs to Maxim's automotive power-management portfolio, engineered specifically for demanding vehicle subsystems requiring cold-crank resilience, low IQ, and integrated protection without external components.
FAQ
What is the maximum input voltage transient the MAX16975BAEE/V+TCG can withstand?
The MAX16975BAEE/V+TCG tolerates input transients up to 42V, complying with ISO 7637-2 Pulse 5a (load dump) requirements. This eliminates the need for external TVS diodes in most automotive front-end applications, reducing system cost and PCB area. Absolute maximum ratings specify SUP/SUPSW to GND at -0.3V to +45V, confirming robustness beyond typical 28V operation.
How does the MAX16975BAEE/V+TCG achieve 94% duty cycle during cold-crank?
The MAX16975BAEE/V+TCG achieves 94% duty cycle during cold-crank by dynamically extending the high-side switch on-time when input voltage drops near output voltage. This maintains regulation down to 3.5V input while preventing BST capacitor discharge. The device uses an internal counter to detect consecutive on-cycles and forces off-time refresh to sustain gate drive voltage under sustained dropout conditions.
Can the MAX16975BAEE/V+TCG operate with a fixed 5V output without external resistors?
Yes, the MAX16975BAEE/V+TCG supports fixed 5V output by connecting the FB pin directly to the BIAS pin-no external feedback resistors required. This configuration reduces component count and quiescent current by up to 50µA compared to adjustable setups. The output is tightly regulated at 4.95V–5.05V across -40°C to +125°C and full load range.
What is the purpose of the CRES pin on the MAX16975BAEE/V+TCG?
The CRES pin on the MAX16975BAEE/V+TCG sources a precise 10µA current to charge an external capacitor, setting the reset timeout period before RES deasserts after successful startup or recovery from dropout. This capacitor-programmable delay ensures reliable power-good signaling to microcontrollers, preventing premature release from reset during marginal input conditions.
Does the MAX16975BAEE/V+TCG require an external bootstrap diode?
No, the MAX16975BAEE/V+TCG integrates a bootstrap diode, eliminating the need for an external component between BST and SUPSW. This simplifies layout, improves reliability in high-vibration automotive environments, and reduces bill-of-materials cost. A 0.1µF ceramic capacitor between BST and LX remains mandatory for proper high-side gate drive operation.
MAX16975BAEE/V+TCG 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX16975BAEE/V+TCG FAQ
1.How can I place an order for MAX16975BAEE/V+TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16975BAEE/V+TCG 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+TCG reliable?
The price and inventory of MAX16975BAEE/V+TCG 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+TCG is usually 5 days.
3.What payment methods are accepted for MAX16975BAEE/V+TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16975BAEE/V+TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16975BAEE/V+TCG?
MAX16975BAEE/V+TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16975BAEE/V+TCG 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+TCG?
For technical support, including MAX16975BAEE/V+TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16975BAEE/V+TCG requirements.
6.How does Aetrix verify that MAX16975BAEE/V+TCG is sourced from the original manufacturer or authorized distributors?
All MAX16975BAEE/V+TCG 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+TCG meets industry standards.
7.What is the process for return or replacement of MAX16975BAEE/V+TCG?
All MAX16975BAEE/V+TCG units undergo pre-shipment inspection (PSI). If there is an issue with MAX16975BAEE/V+TCG, 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+TCG part is unused and in its original packaging.
Return procedure for MAX16975BAEE/V+TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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