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Analog Devices Inc./Maxim Integrated MAX16904RAUE33+
- Part No.:
- MAX16904RAUE33+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16904RAUE33+.pdf
- Description:
- IC REG BUCK 3.3V 600MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,876
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Product details
Overview
The MAX16904RAUE33+ from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output at fixed 3.3V with integrated high-side and low-side MOSFETs, operating from +3.5V to +28V input and consuming only 25μA quiescent current in SKIP mode-ideal for automotive infotainment power rails requiring high-voltage tolerance and low-noise operation.
For engineers reviewing the MAX16904RAUE33+ datasheet, MAX16904RAUE33+ pinout, MAX16904RAUE33+ application, or MAX16904RAUE33+ equivalent, key selection criteria include its AEC-Q100 qualification, -40°C to +125°C operation, 2.1MHz switching frequency with SYNC programmability, spread-spectrum option (not enabled on this variant), and 16-pin TSSOP-EP thermal package with exposed pad.
Technical Context
The MAX16904RAUE33+ implements current-mode control with internal slope compensation and no external compensation required. Its 2.1MHz fixed-frequency PWM operation (with forced-PWM, SKIP, and sync modes) enables compact 3.3μH inductor and low-ESR ceramic capacitor designs while avoiding AM-band interference.
It integrates undervoltage lockout (3.0V typ), thermal shutdown (+175°C), overcurrent protection (1.05A typ), and open-drain PGOOD monitoring. The device sustains dropout operation at >97% duty cycle and tolerates +42V transients-critical for automotive cold-crank and load-dump conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +3.5V to +28V; withstands +42V transients for automotive robustness |
| Output Voltage | Fixed 3.3V ±2.5% (fixed-frequency mode); ±4.0% (SKIP mode) |
| Max Output Current | 600mA continuous; peak current limit 1.05A for short-circuit protection |
| Switching Frequency | 2.1MHz typical; supports SYNC input for external clock synchronization or forced-PWM/SKIP mode selection |
| Quiescent Current | 25μA typical in SKIP mode; enables ultra-low standby power for battery-sensitive systems |
| Operating Temp | -40°C to +125°C; qualified per AEC-Q100 Grade 1 for automotive under-hood use |
| Package | 16-pin TSSOP-EP (5mm × 4.4mm) with exposed thermal pad connected to PGND |
Pinout & Package
MAX16904RAUE33+ uses a thermally enhanced 16-pin TSSOP-EP package (U16E+3 outline) with exposed pad soldered to PGND for efficient heat dissipation. Pin functions are validated per Maxim's official pin description table and match the RAUE variant ordering code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SUP (Pins 2,3) | Input voltage supply rail | Dual pins require parallel connection; accepts +3.5V–+28V with +42V transient tolerance |
| LX (Pins 4,5) | Switch node | Connect both pins together; drives external inductor; requires 0.1µF BST capacitor to SUP |
| PGND (Pins 6,7) | Power ground return | Dual pins must be tied together and connected to exposed pad; carries high AC ripple current |
| OUTS (Pin 8) | Voltage feedback sense | Connects to output capacitor; regulates 3.3V with ±2.5% accuracy in fixed-frequency mode |
| PGOOD (Pin 11) | Open-drain power-good flag | Pulls low when VOUT drops below 91% of nominal; requires external 20kΩ pull-up |
| SYNC (Pin 12) | Mode control and clock sync input | GND/unconnected → SKIP mode; BIAS/high → forced PWM; external clock → synchronized operation |
| BIAS (Pin 13) | Internal +5V logic supply | Bypass with 2.2µF ceramic to GND; powers internal circuitry and can serve as PGOOD pull-up |
| GND (Pin 14) | Analog ground reference | Separate from PGND; connect to PGND only at output capacitor return point |
| EN (Pin 15) | Enable control | High-voltage compatible (up to +42V); logic-high ≥2.4V enables regulation |
| BST (Pin 16) | Bootstrap capacitor connection | Connect 0.1µF ceramic between BST and LX to drive high-side FET gate |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high/low-side MOSFETs | Eliminates external switches; RDS(ON) = 400mΩ (HS) / 250mΩ (LS) reduces conduction loss |
| Three SYNC-selectable modes | Enables dynamic trade-off: SKIP (25μA IQ), forced PWM (stable EMI), or external sync (system timing alignment) |
| Power-Good (PGOOD) output | Monitors regulated 3.3V rail with 91–93% threshold window and 10µs debounce for reliable system sequencing |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including infotainment, ADAS sensors, and body control modules |
| Thermal shutdown with hysteresis | Shuts down at +175°C and restarts after cooling by 15°C-prevents latch-up during sustained overload |
Applications
| Automotive Infotainment Power | Industrial Sensor Hub Supply |
|---|---|
Use Scenario: Powers audio DSP, display controller, and USB interface in vehicle head units during cold-crank (5V–12V battery dips). IC Role / Device Role / Timing Role: Primary 3.3V buck regulator with PGOOD sequencing and transient immunity. Use Value: Maintains regulation down to 3.5V input and survives +42V load-dump spikes without external TVS. | Use Scenario: Supplies 3.3V to multi-sensor nodes (temperature, pressure, IMU) in factory automation PLCs. IC Role / Device Role / Timing Role: Compact, high-efficiency local DC-DC converter replacing linear regulators. Use Value: 25μA quiescent current extends battery life in wireless sensor nodes; 2.1MHz switching minimizes EMI near analog signal paths. |
| ADAS Camera Module Rail | Telematics Control Unit (TCU) Core Logic |
Use Scenario: Provides clean 3.3V to image sensor and serializer in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Noise-sensitive power stage with spread-spectrum disabled to avoid jitter coupling into pixel clock. Use Value: Low output ripple (<15mVpp) and fast transient response (<40µs recovery) preserve image integrity. | Use Scenario: Generates 3.3V for cellular modem, GNSS receiver, and microcontroller in automotive telematics gateways. IC Role / Device Role / Timing Role: High-reliability primary buck converter with thermal and overcurrent fault reporting via PGOOD. Use Value: AEC-Q100 qualification ensures long-term reliability across temperature cycling and vibration stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMQ61460RWR | 4.2V–36V input; 600mA; 2.1MHz; no spread-spectrum; different pinout and enable logic | Requires PCB redesign; lacks AEC-Q100 qualification; higher IQ (35μA) | Consider only for non-automotive industrial use where footprint flexibility exists |
| TPS62933RTER | 3V–18V input; 3A output; 2.25MHz; integrated compensation; smaller 2mm × 2mm QFN | Over-spec'd current capability; narrower input range excludes 24V systems | Prefer for space-constrained designs needing higher current headroom and lower profile |
Compared with LM61460RWR and TPS62933RTER, the MAX16904RAUE33+ offers superior automotive qualification, wider input range (+3.5V–+28V), and proven transient resilience-making it the optimal choice for cost-sensitive, thermally constrained automotive 3.3V rails where AEC-Q100 compliance is mandatory.
Availability
MAX16904RAUE33+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial sensor hubs requiring stable component supply, AEC-Q100 assurance, and long-lifecycle support.
Supply support for MAX16904RAUE33+ 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 demanding industrial, automotive, and communications applications.
The MAX16904 product line delivers high-voltage, high-efficiency mini-buck converters optimized for automotive subsystems requiring wide input range, low IQ, and robust fault protection-especially in space- and thermal-constrained ECUs.
FAQ
What is the output voltage accuracy of the MAX16904RAUE33+ under full load and temperature?
The MAX16904RAUE33+ delivers 3.3V output with ±2.5% accuracy across -40°C to +125°C and 0–600mA load when operating in fixed-frequency mode. In SKIP mode, accuracy degrades to ±4.0% due to variable frequency operation affecting regulation tightness-verified per Electrical Characteristics Table on page 3 of the datasheet.
Does the MAX16904RAUE33+ support external frequency synchronization?
Yes, the MAX16904RAUE33+ supports external synchronization via its SYNC pin. When driven with a clock signal between 1.8MHz and 2.6MHz, the device locks to the external source-enabling deterministic EMI reduction and system-level timing coordination without modifying the MAX16904RAUE33+'s internal oscillator.
What is the maximum input voltage transient the MAX16904RAUE33+ can survive?
The MAX16904RAUE33+ tolerates input voltage transients up to +42V for ≤1 second, as specified in Absolute Maximum Ratings. This capability is critical for automotive applications facing load-dump events, and is achieved through internal clamping and robust DMOS design-not dependent on external components.
How does the MAX16904RAUE33+ achieve ultra-low quiescent current?
The MAX16904RAUE33+ achieves 25μA typical quiescent current in SKIP mode by disabling non-essential internal blocks-including the high-voltage LDO-when load current falls below 5mA. This state is automatically entered when SYNC is grounded or floating, and is confirmed in Typical Operating Characteristics (Figure toc02) and Detailed Description section.
Is the MAX16904RAUE33+ pin-compatible with other variants in the MAX16904 family?
Yes, all MAX16904RAUE variants-including MAX16904RAUE33+, MAX16904RAUE50+, and MAX16904RAUE18/V+-share identical 16-pin TSSOP-EP pinout and footprint. Output voltage is factory-trimmed; no external resistor network is needed, enabling drop-in replacement across 1.8V–5.5V options within the same package.
MAX16904RAUE33+ 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):
- 3.3V
- 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
MAX16904RAUE33+ FAQ
1.How can I place an order for MAX16904RAUE33+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904RAUE33+ 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 MAX16904RAUE33+ reliable?
The price and inventory of MAX16904RAUE33+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904RAUE33+ is usually 5 days.
3.What payment methods are accepted for MAX16904RAUE33+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904RAUE33+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904RAUE33+?
MAX16904RAUE33+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904RAUE33+ 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 MAX16904RAUE33+?
For technical support, including MAX16904RAUE33+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904RAUE33+ requirements.
6.How does Aetrix verify that MAX16904RAUE33+ is sourced from the original manufacturer or authorized distributors?
All MAX16904RAUE33+ 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 MAX16904RAUE33+ meets industry standards.
7.What is the process for return or replacement of MAX16904RAUE33+?
All MAX16904RAUE33+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904RAUE33+, 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 MAX16904RAUE33+ part is unused and in its original packaging.
Return procedure for MAX16904RAUE33+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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