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Analog Devices Inc./Maxim Integrated MAX16975AEE/V+
- Part No.:
- MAX16975AEE/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX16975AEE/V+.pdf
- Description:
- IC REG BUCK ADJ/1V 1.2A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,286
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Product details
Overview
MAX16975AEE/V+ from Maxim Integrated is a 1.2A automotive-grade current-mode step-down converter with integrated high-side MOSFET, 3.5V–28V input range, 45µA skip-mode quiescent current, and pin-selectable 5V fixed or 1V–10V adjustable output voltage. It operates across –40°C to +125°C and supports synchronization to external clock for EMI control in vehicle infotainment power rails.
For engineers reviewing the MAX16975AEE/V+ datasheet, MAX16975AEE/V+ pinout, MAX16975AEE/V+ application, or MAX16975AEE/V+ equivalent, key selection criteria include cold-crank tolerance (94% duty cycle), programmable reset threshold via RESETI, capacitor-adjustable reset timeout via CRES, and thermal shutdown with +175°C trip point and +15°C hysteresis.
Technical Context
The MAX16975AEE/V+ uses constant-frequency current-mode control with internal 1.2A high-side switch and integrated bootstrap diode. Its oscillator frequency is resistor-programmable (220kHz–1.0MHz) or synchronizable via FSYNC input requiring 10% higher external frequency.
It implements dropout operation with dynamic BST capacitor refresh logic, active-low open-drain RES output with 93–95% VFB threshold hysteresis, and BIAS linear regulator that auto-switches between internal 5V supply and OUT-derived power when VOUT is 3V–5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 28V - supports full automotive battery range including cold-crank dips to 3.5V |
| Output Current | 1.2A continuous - rated at junction temperature ≤ +125°C with QSOP-EP package |
| Quiescent Current | 45µA in skip mode - enables always-on systems like CAN wake-up receivers without battery drain |
| Switching Frequency | 220kHz to 1.0MHz - adjustable via FOSC resistor or synchronized externally via FSYNC |
| Output Voltage Options | Fixed 5V (FB tied to BIAS) or 1V–10V adjustable (FB via resistive divider) - supports MCU core, I/O, and sensor rail requirements |
| Thermal Shutdown | +175°C trip with +15°C hysteresis - ensures safe recovery after overload without manual reset |
| Reset Threshold Accuracy | ±1.5% over temperature - enables reliable microcontroller brownout detection down to minimum VIN |
Pinout & Package
MAX16975AEE/V+ 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 four-layer board.
| 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 | Resistor-to-GND sets switching frequency from 220kHz to 1.0MHz; no external capacitor required |
| FSYNC | External clock synchronization input | Accepts TTL/CMOS signal ≥10% faster than internal fOSC; enables EMI spread-spectrum alignment |
| COMP | Error amplifier output | Connect Type II/III compensation network to GND for stable loop response across load/temperature |
| FB | Voltage feedback input | 1.0V reference input; connects to resistive divider for adjustable output or ties directly to BIAS for 5V fixed |
| OUT | Power output connection | Delivers regulated voltage; powers internal circuitry when VOUT = 3V–5.5V, reducing quiescent current by ~50µA |
| BIAS | Internal 5V LDO output | Bypassed with 1µF ceramic cap; supplies bias for control logic and shuts down when OUT is in regulation |
| BST | Bootstrap capacitor node | Requires 0.1µF ceramic cap between BST and LX; enables high-side gate drive during 100% duty-cycle dropout |
| 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 catch diode; voltage swings from GND to VIN during operation |
| EN | Enable input | 3.3V–42V compatible; logic-high >2.2V enables, logic-low <0.8V disables; 10nA input leakage |
| RES | Open-drain reset output | Active-low; asserts when VOUT falls below programmed threshold; requires external pull-up |
| RESETI | Reset threshold programming input | 1.25V reference input; connect resistive divider from OUT to GND to set custom reset point |
| GND | Signal and power ground | Primary return path; EP pad must be connected to large-area copper plane for thermal conduction |
| I.C. | Internally connected | Pin 4 is internally tied to GND; must be externally connected to ground |
Key Features
| Feature | Design Value |
|---|---|
| 42V input transient tolerance | Withstands load-dump events up to 42V without latch-up or damage, eliminating need for external TVS |
| Adjustable power-good timing | CRES capacitor sets precise reset timeout period - critical for sequenced boot of multi-rail automotive ECUs |
| 94% cold-crank duty cycle | Maintains regulation during engine start when battery drops to 3.5V, preventing microcontroller reset |
| Less than 10µA shutdown current | Enables true zero-power sleep mode for telematics modules with CAN wake capability |
| Integrated boost diode | Eliminates external bootstrap diode, reducing BOM count and PCB area in space-constrained automotive modules |
Applications
| ADAS Camera Power Supply | Infotainment System Core Rail |
|---|---|
Use Scenario: Dual-sensor front-facing camera module requiring stable 1.2V/1.8V core and 3.3V I/O rails under engine cranking. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.2A at 1.2V with tight line/load regulation and cold-crank hold-up. Use Value: 45µA skip-mode current prevents battery depletion during parked surveillance; 94% duty cycle sustains output during 3.5V cranking pulses. | Use Scenario: Central display unit with ARM-based SoC needing clean 5V rail for USB PHY and audio codec. IC Role / Device Role / Timing Role: Fixed 5V step-down converter with power-good monitoring for controlled SoC power sequencing. Use Value: Adjustable RES timeout via CRES ensures proper boot order with PMIC and processor; FSYNC sync avoids beat frequencies with display pixel clocks. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Gateway ECU managing LIN/CAN communication and door lock actuation with low standby power budget. IC Role / Device Role / Timing Role: Always-on 5V supply enabling CAN transceiver wake detection while maintaining <50µA system quiescent draw. Use Value: 9µA shutdown current and EN compatibility with KL30 battery rail allow direct connection without level-shifting; thermal shutdown protects against enclosure overheating. | Use Scenario: Cellular-connected TCU requiring robust 3.3V rail for modem and GNSS receiver in varying ambient temperatures. IC Role / Device Role / Timing Role: Adjustable-output buck converter (3.3V via FB divider) with wide-temp operation and reset supervision. Use Value: –40°C to +125°C rating ensures reliability in trunk-mounted installations; RESETI programmability allows matching modem brownout threshold. |
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; 3.5V–36V input; no integrated boost diode; requires external BST diode | Targeted at higher-power ADAS domain controllers; lacks CRES-programmable reset timeout | Select when >1.2A load or >28V transient margin is required; accept added BOM and layout complexity |
| TPS62903-Q1 | Lower 3A output; 3V–18V input; 15µA IQ; no cold-crank optimization; no 42V transient rating | Optimized for low-IQ infotainment subsystems; not rated for 12V battery cold-crank stress | Select for non-critical interior modules where 3.5V minimum VIN is guaranteed; avoid for engine bay or BCM use |
Compared with LM61480-Q1 and TPS62903-Q1, the MAX16975AEE/V+ uniquely combines cold-crank resilience (94% duty cycle), integrated boost diode, and capacitor-programmable reset timing-making it optimal for cost-sensitive, thermally constrained automotive body electronics where reliability under battery stress is mandatory.
Availability
MAX16975AEE/V+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, body control modules, and telematics control units requiring stable component supply across extended temperature and harsh electrical environments.
Supply support for MAX16975AEE/V+ 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 MAX16975AEE/V+ belongs to Maxim's automotive power management portfolio, engineered specifically for high-reliability DC-DC conversion in engine bay, chassis, and safety-critical electronic control units operating from 12V/24V battery systems.
FAQ
What is the maximum input voltage transient the MAX16975AEE/V+ can withstand?
The MAX16975AEE/V+ is rated for 42V input transients, meeting ISO 7637-2 Pulse 5a requirements for automotive load-dump protection. This eliminates the need for external TVS diodes in most 12V system designs. The device sustains this stress without latch-up or parametric shift, verified across –40°C to +125°C. Absolute maximum rating for SUP/SUPSW pins is +45V, but functional operation above 42V is not guaranteed.
How does the MAX16975AEE/V+ maintain regulation during cold-crank conditions?
The MAX16975AEE/V+ achieves 94% effective duty cycle during cold-crank events, allowing continuous regulation down to 3.5V input. This is implemented via dynamic BST capacitor refresh logic that forces periodic low-side conduction to recharge the bootstrap capacitor even at ultra-low VIN. The feature is active without external components and is validated across temperature and load conditions per datasheet Figure 7 (cold-crank pulse test).
Can the MAX16975AEE/V+ operate with a fixed 5V output without external resistors?
Yes, the MAX16975AEE/V+ supports fixed 5V output by connecting the FB pin directly to the BIAS pin. This configuration disables the external feedback divider, reduces quiescent current by ~50µA, and simplifies layout for standard 5V rails. Output accuracy is ±1% over temperature and line, per Electrical Characteristics Table on page 3 of the datasheet.
What is the purpose of the CRES pin on the MAX16975AEE/V+ and how is it used?
The CRES pin on the MAX16975AEE/V+ sources a precise 10µA (typ) current to charge an external capacitor, setting the reset timeout period before RES deasserts after startup or fault recovery. Timeout = (1.13V × C) / 10µA, where C is capacitance in farads. This enables customizable power-good timing for sequenced boot of multi-rail systems - a capability not found in most competing automotive buck regulators.
Does the MAX16975AEE/V+ require an external bootstrap diode?
No, the MAX16975AEE/V+ integrates a bootstrap diode, eliminating the need for an external component between BST and LX. This reduces BOM count, saves PCB area, and improves reliability in vibration-prone automotive environments. The internal diode is sized to support the 2.5mA BST supply current requirement during dropout operation, as specified in the Electrical Characteristics table.
MAX16975AEE/V+ 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
MAX16975AEE/V+ FAQ
1.How can I place an order for MAX16975AEE/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16975AEE/V+ 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 MAX16975AEE/V+ reliable?
The price and inventory of MAX16975AEE/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16975AEE/V+ is usually 5 days.
3.What payment methods are accepted for MAX16975AEE/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16975AEE/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16975AEE/V+?
MAX16975AEE/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16975AEE/V+ 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 MAX16975AEE/V+?
For technical support, including MAX16975AEE/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16975AEE/V+ requirements.
6.How does Aetrix verify that MAX16975AEE/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16975AEE/V+ 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 MAX16975AEE/V+ meets industry standards.
7.What is the process for return or replacement of MAX16975AEE/V+?
All MAX16975AEE/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16975AEE/V+, 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 MAX16975AEE/V+ part is unused and in its original packaging.
Return procedure for MAX16975AEE/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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