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Analog Devices Inc./Maxim Integrated MAX16904RAUE18/V+
- Part No.:
- MAX16904RAUE18/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16904RAUE18/V+.pdf
- Description:
- IC REG BUCK 1.8V 600MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,351
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Product details
Overview
The MAX16904RAUE18/V+ from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output with 3.5V–28V input, 1.8V fixed output, 2.1MHz switching frequency, and 25μA quiescent current in SKIP mode-designed for automotive infotainment power rails requiring high-voltage tolerance and AEC-Q100 compliance.
For engineers reviewing the MAX16904RAUE18/V+ datasheet, MAX16904RAUE18/V+ pinout, MAX16904RAUE18/V+ application, or MAX16904RAUE18/V+ equivalent, this page provides verified package mapping (16-pin TSSOP-EP), thermal performance (θJA = 38.3°C/W), dropout operation at 97% duty cycle, spread-spectrum disable status, and validated alternative options for 1.8V automotive buck conversion.
Technical Context
The MAX16904RAUE18/V+ implements current-mode control with integrated high-side (400–800mΩ RDS(ON)) and low-side (250–450mΩ) MOSFETs, enabling stable regulation across -40°C to +125°C without external compensation. Its 80ns minimum on-time supports wide input-to-output ratios, including cold-crank conditions down to 2.8V UVLO.
SYNC pin logic determines operational mode: grounded/unconnected enables ultra-low-power SKIP mode (25μA IQ, 350mA peak skip threshold); driven by BIAS or external clock forces fixed-frequency PWM. PGOOD monitors output within ±2.0% to ±4.0% accuracy depending on mode, with 10μs debounce and open-drain output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.0% (fixed-frequency mode), ±4.0% (SKIP mode)-factory-trimmed, no external feedback required. |
| Input Voltage Range | +3.5V to +28V continuous; withstands +42V transients ≤1s-enables direct connection to automotive battery rails. |
| Max Output Current | 600mA continuous; overcurrent protection triggers at 1.05A typical-supports infotainment SoC core rails and sensor interfaces. |
| Switching Frequency | 2.1MHz typical (1.925–2.275MHz range); supports small 3.3µH inductor and 10µF ceramic output capacitor. |
| Quiescent Current | 25μA typical in SKIP mode at no load-extends battery life in always-on vehicle modules. |
| Thermal Protection | Thermal shutdown at +175°C with 15°C hysteresis; junction-to-ambient θJA = 38.3°C/W (TSSOP-EP)-enables high-power-density layout. |
| AEC-Q100 Grade | Qualified to Grade 1 (-40°C to +125°C ambient)-certified for engine bay, ADAS, and body control module deployment. |
Pinout & Package
MAX16904RAUE18/V+ uses a thermally enhanced 16-pin TSSOP-EP package (5mm × 4.4mm, exposed pad). The EP must be soldered to PGND for thermal and electrical integrity. Dual SUP, LX, and PGND pins require internal connection per datasheet for proper operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | SUP | Main input supply (3.5V–28V); connect both pins together and decouple with 4.7µF ceramic near pin. |
| 2, 3 | LX | Switch node connecting internal HS/LS FETs to external inductor; tie both pins together for low-inductance path. |
| 4, 5, 7 | PGND | Power ground return for high-current paths; connect all three pins to common PGND plane under EP. |
| 6 | OUTS | Voltage sense input; bypass to PGND with ≥10µF X7R ceramic-sets regulation point for 1.8V output. |
| 8 | PGOOD | Open-drain power-good signal; pulls low if VOUT < 91% nominal-used for system sequencing and fault reporting. |
| 9 | SYNC | Mode control: GND/unconnected → SKIP; BIAS/external clock → forced PWM-enables dynamic efficiency optimization. |
| 10 | BIAS | +5V internal LDO output; bypass with 2.2µF ceramic to GND-powers internal logic and enables EN/SYNC interface. |
| 11 | GND | Analog ground reference; connect to PGND only at output capacitor return-prevents noise coupling into feedback path. |
| 12 | EN | Enable input; high-voltage compatible (3.3V logic to +42V); no internal pullup-supports direct microcontroller or CAN inhibit control. |
| 13, 14, 16 | N.C. | No internal connection; leave unconnected-no routing or thermal relief required. |
| EP | Exposed Pad | Thermal and electrical connection to PGND; mandatory for thermal performance and EMI reduction-requires ≥4 vias to inner PGND plane. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 25μA in SKIP mode enables >10-year battery standby in always-on telematics modules. |
| Dropout operation | 97% duty cycle allows regulation down to VIN = VOUT + 0.2V-critical for cold-crank (6V) support in 1.8V rail applications. |
| AM-band interference immunity | 2.1MHz fixed frequency avoids 0.53–1.71MHz AM radio band-eliminates need for additional EMI filtering in audio systems. |
| Integrated power-good monitoring | PGOOD with 10μs debounce and 91–98% trip thresholds enables reliable power sequencing in multi-rail ECUs. |
| High-voltage enable interface | EN pin tolerates +42V-allows direct connection to battery-sensed signals without level-shifting circuitry. |
| Thermally optimized packaging | TSSOP-EP with θJA = 38.3°C/W supports 1.2W continuous dissipation at +70°C ambient-reduces heatsink requirements. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers 1.8V core voltage of SoCs in head-unit displays and digital clusters during engine start-stop cycles. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 1.8V/600mA with cold-crank support and PGOOD sequencing. Use Value: Maintains stable output during 6V battery dips while consuming only 25μA in standby-extending display-on time in key-off mode. |
Use Scenario: Supplies image sensor and ISP in rear-view cameras exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: High-reliability 1.8V DC-DC converter operating continuously across -40°C to +125°C ambient. Use Value: AEC-Q100 Grade 1 qualification and thermal shutdown with 15°C hysteresis prevent field failures in sealed camera housings. |
| Body Control Module (BCM) Sub-Rail | Telematics Control Unit (TCU) Always-On Rail |
Use Scenario: Generates 1.8V auxiliary rail for LIN transceivers and EEPROM in door modules and seat controllers. IC Role / Device Role / Timing Role: Compact, low-noise buck converter replacing discrete solutions with minimal BOM count. Use Value: 2.1MHz switching enables use of 3.3µH inductor and 10µF ceramic output cap-reducing solution size by 40% vs. 500kHz alternatives. |
Use Scenario: Provides always-on 1.8V supply for GPS baseband and cellular modem sleep-state logic in connected vehicles. IC Role / Device Role / Timing Role: Ultra-low-IQ buck regulator maintaining regulation during 10-year battery backup periods. Use Value: 25μA quiescent current ensures <10µA system-level leakage-meeting OEM requirements for 15-year battery service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1.8V automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRNXTQ1 | 3.5V–36V input, 1.8V fixed output, 2.1MHz, 1A output, 12µA IQ; QFN-16 package (3mm × 4.5mm). | Higher output current (1A) and lower IQ (12µA), but requires external compensation and lacks spread-spectrum option. | Select when higher current headroom or lower standby power is critical; verify PCB layout compatibility with QFN thermal pad. |
| TPS62933QPWRQ1 | 3V–18V input, 1.8V fixed output, 2.25MHz, 3A output, 15µA IQ; 16-pin WQFN (3mm × 3mm) with wettable flanks. | Wider bandwidth (2.25MHz), higher current, but narrower input range excludes 24V industrial use and cold-crank support. | Prefer for space-constrained designs needing 3A capability; avoid in 24V truck or battery-transient-heavy applications. |
Compared with LM61480QRNXTQ1 and TPS62933QPWRQ1, the MAX16904RAUE18/V+ uniquely combines AEC-Q100 Grade 1 qualification, +42V transient tolerance, and factory-trimmed 1.8V output in a mature, production-proven TSSOP-EP package-making it optimal for cost-sensitive, thermally demanding automotive sub-rails where 600mA suffices.
Availability
MAX16904RAUE18/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and telematics systems requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for MAX16904RAUE18/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-with emphasis on high-reliability, high-efficiency solutions.
The MAX16904RAUE18/V+ belongs to Maxim's automotive-grade mini-buck converter family, engineered specifically for compact, high-voltage DC-DC conversion in space- and thermal-constrained vehicle subsystems.
FAQ
What is the output voltage tolerance of the MAX16904RAUE18/V+ in fixed-frequency mode?
The MAX16904RAUE18/V+ delivers 1.8V output with ±2.0% tolerance in forced fixed-frequency mode across -40°C to +125°C ambient, 6V–18V input, and 0–600mA load. This specification is production-tested and guaranteed per the Electrical Characteristics table in the datasheet.
Does the MAX16904RAUE18/V+ support synchronization to an external clock source?
Yes, the MAX16904RAUE18/V+ supports external clock synchronization via its SYNC pin. When driven by a clock signal between 1.8MHz and 2.6MHz, the device enters forced PWM mode and locks to the external frequency-enabling EMI reduction through coordinated switching in multi-rail systems.
What is the maximum continuous output current capability of the MAX16904RAUE18/V+?
The MAX16904RAUE18/V+ guarantees 600mA continuous output current under all operating conditions within its -40°C to +125°C temperature range. Overcurrent protection limits peak current to 1.05A typical, and thermal shutdown activates at +175°C junction temperature to protect the device.
Is the MAX16904RAUE18/V+ qualified for automotive applications?
Yes, the MAX16904RAUE18/V+ is AEC-Q100 qualified (Grade 1) and rated for -40°C to +125°C ambient operation. The "/V+" suffix explicitly denotes automotive qualification, including stress testing for temperature cycling, humidity, and mechanical shock per AEC standards.
What package type and thermal characteristics does the MAX16904RAUE18/V+ use?
The MAX16904RAUE18/V+ uses a 16-pin TSSOP-EP package with exposed pad. Its thermal resistance is θJA = 38.3°C/W and θJC = 3°C/W on a four-layer board-enabling 1.2W continuous power dissipation at +70°C ambient with proper PCB copper area and via design.
MAX16904RAUE18/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MAX16904RAUE18/V+ FAQ
1.How can I place an order for MAX16904RAUE18/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904RAUE18/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 MAX16904RAUE18/V+ reliable?
The price and inventory of MAX16904RAUE18/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904RAUE18/V+ is usually 5 days.
3.What payment methods are accepted for MAX16904RAUE18/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904RAUE18/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904RAUE18/V+?
MAX16904RAUE18/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904RAUE18/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 MAX16904RAUE18/V+?
For technical support, including MAX16904RAUE18/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904RAUE18/V+ requirements.
6.How does Aetrix verify that MAX16904RAUE18/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16904RAUE18/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 MAX16904RAUE18/V+ meets industry standards.
7.What is the process for return or replacement of MAX16904RAUE18/V+?
All MAX16904RAUE18/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904RAUE18/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 MAX16904RAUE18/V+ part is unused and in its original packaging.
Return procedure for MAX16904RAUE18/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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