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Analog Devices Inc./Maxim Integrated MAX16904RAUE50+
- Part No.:
- MAX16904RAUE50+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16904RAUE50+.pdf
- Description:
- IC REG BUCK 5V 600MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,088
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Product details
Overview
The MAX16904RAUE50+ from Maxim Integrated is a synchronous buck DC-DC converter IC with integrated high-side and low-side MOSFETs, delivering 600mA output current from +3.5V to +28V input while consuming only 25μA quiescent current in SKIP mode. It operates at 2.1MHz fixed frequency (or synchronizable), features PGOOD monitoring, 97% dropout duty cycle, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX16904RAUE50+ datasheet, MAX16904RAUE50+ pinout, MAX16904RAUE50+ application, or MAX16904RAUE50+ equivalent, key selection criteria include its -40°C to +125°C operating range, 16-pin TSSOP-EP package with exposed pad, 5.0V fixed output, no external compensation requirement, and compatibility with automotive cold-crank transients up to +42V.
Technical Context
This current-mode buck regulator uses internal slope compensation and requires no external loop compensation. Its 2.1MHz switching frequency enables compact 3.3µH–4.7µH inductors and low-ESR ceramic capacitors, while the 80ns minimum on-time supports wide VIN/VOUT ratios without pulse-skipping under normal operation.
Three operational modes are controlled via the SYNC pin: forced PWM (for EMI control), SKIP mode (25μA IQ), and external synchronization. The device enters dropout at >97% duty cycle by pulsing the low-side FET for ~150ns every 6.5μs to refresh the BST capacitor, maintaining regulation down to VIN ≈ VOUT + 0.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +3.5V to +28V; tolerates +42V transients for automotive cold-crank robustness |
| Output Voltage | Fixed 5.0V ±2.5% (fixed-frequency mode), ±4.0% (SKIP mode) |
| Max Output Current | 600mA continuous; peak current limit 1.05A typ for short-circuit protection |
| Switching Frequency | 2.1MHz typ; programmable via SYNC pin for forced PWM, SKIP, or external sync |
| Quiescent Current | 25μA typ in SKIP mode at no load; 1mA max in continuous no-switching state |
| Thermal Range | -40°C to +125°C ambient; thermal shutdown at +175°C junction, 15°C hysteresis |
| Package | 16-pin TSSOP-EP (5mm × 4.4mm) with exposed pad tied to PGND for thermal dissipation |
Pinout & Package
MAX16904RAUE50+ is housed in a thermally enhanced 16-pin TSSOP-EP package (U16E+3 outline) with an exposed pad soldered to PGND for improved thermal performance (θJA = 38.3°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SUP (Pins 2,3) | Input voltage supply rail | Dual pins require parallel connection; must be decoupled with ≥4.7µF ceramic cap placed adjacent to pins |
| LX (Pins 4,5) | Switch node between HS/LS FETs | Dual pins must be shorted externally; connects to inductor and BST capacitor |
| PGND (Pins 6,7) | Power ground return | Dual pins must be shorted externally; primary return path for high-current switching loop |
| OUTS (Pin 8) | Output voltage feedback sense | High-impedance input referenced to PGND; bypassed with ≥10µF X7R ceramic to PGND |
| PGOOD (Pin 11) | Open-drain power-good indicator | Pulls low when VOUT < 91% nominal; requires external 20kΩ pull-up to BIAS or system rail |
| SYNC (Pin 12) | Mode control and clock input | GND/unconnected → SKIP mode; BIAS or clock signal → forced PWM or sync mode |
| BIAS (Pin 13) | Internal 5V LDO output | Supplies internal logic; bypassed with 2.2µF ceramic to GND; can power PGOOD pull-up |
| GND (Pin 14) | Analog ground reference | Separate from PGND; connected to PGND only at output capacitor return point |
| EN (Pin 15) | Enable control input | High-voltage compatible (3.3V–42V logic); no internal pullup/pulldown to minimize IQ |
| BST (Pin 16) | Bootstrap capacitor connection | Drives high-side FET gate; requires 0.1µF ceramic capacitor between BST and LX |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side DMOS | RDS(ON) = 400mΩ (HS) / 250mΩ (LS) at VBIAS = 5V - reduces external component count and conduction loss |
| Ultra-low quiescent current | 25μA in SKIP mode - extends battery life in always-on automotive modules |
| 97% dropout operation | Maintains regulation during cold-crank events where VIN drops near VOUT - critical for infotainment and ADAS power rails |
| AEC-Q100 qualified | Grade 0 (-40°C to +125°C) - certified for under-hood and safety-critical automotive applications |
| No external compensation required | Current-mode architecture with internal slope compensation - simplifies design and improves transient response |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering SoC, display interface, and audio codecs in head units with wide battery voltage swing (6V–16V) and cold-crank immunity. IC Role / Device Role / Timing Role: Primary 5V buck regulator providing stable, low-noise rail with PGOOD sequencing and thermal fault reporting. Use Value: 2.1MHz switching avoids AM band interference; 25μA IQ minimizes parasitic drain during vehicle sleep mode. | Use Scenario: Generating clean 5V supply for CMOS image sensors and ISP processors in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC converter mounted directly on camera PCB with minimal layout area. Use Value: TSSOP-EP package with exposed pad ensures reliable operation at +105°C ambient; 97% dropout sustains output during engine start. |
| Industrial Control I/O Module | Rail-to-Rail Automotive Body Controller |
Use Scenario: Powering isolated communication interfaces (CAN, LIN) and microcontrollers in factory automation PLCs with unregulated 24V DC input. IC Role / Device Role / Timing Role: High-input-voltage buck stage converting 24V to 5V for digital logic and sensor interfaces. Use Value: +42V transient tolerance eliminates need for upstream TVS; SYNC pin enables synchronized switching across multiple rails to reduce EMI peaks. | Use Scenario: Distributed 5V supply for door modules, seat controllers, and lighting ECUs requiring long-term reliability and zero maintenance. IC Role / Device Role / Timing Role: AEC-Q100-compliant point-of-load regulator with integrated protection (OCP, OTP, UVLO). Use Value: 16-pin TSSOP-EP allows automated optical inspection and reflow compatibility; exposed pad improves MTBF in vibration-prone environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQRR | 3.5V–36V input, 8A output, 2.1MHz, but larger 16-pin WQFN (3mm × 4.5mm) and higher IQ (26μA) | Targeted at higher-current industrial supplies; lacks AEC-Q100 qualification | Select for non-automotive 5V/6A systems needing higher headroom and adjustable output |
| TPS62933RTER | 3V–18V input, 3A output, 2.25MHz, 12-pin WQFN (2mm × 3mm), 15μA IQ, but no +42V transient rating | Optimized for space-constrained consumer electronics; not rated for automotive temperature or transients | Select for portable or telecom applications where size and ultra-low IQ outweigh transient robustness |
Compared with LM61480RQRR and TPS62933RTER, the MAX16904RAUE50+ uniquely combines AEC-Q100 Grade 0 qualification, +42V transient tolerance, and 5.0V fixed output in a mature 16-pin TSSOP-EP package-making it optimal for cost-sensitive, high-reliability automotive body electronics where footprint and qualification are decisive.
Availability
MAX16904RAUE50+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, industrial control I/O, and body electronics requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for MAX16904RAUE50+ 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 MAX16904RAUE50+ belongs to Maxim's automotive-grade mini-buck converter family, engineered specifically for high-input-voltage, low-IQ, AEC-Q100-compliant power rails in space- and reliability-constrained vehicle subsystems.
FAQ
What is the output voltage accuracy of the MAX16904RAUE50+ under full load and temperature range?
The MAX16904RAUE50+ delivers 5.0V output with ±2.5% accuracy over -40°C to +125°C ambient, 6V–18V input, and 0–600mA load in fixed-frequency mode. In SKIP mode, accuracy degrades to ±4.0% due to variable frequency operation affecting regulation tightness - confirmed in Electrical Characteristics Table on page 3 of the datasheet.
Does the MAX16904RAUE50+ require external compensation components?
No, the MAX16904RAUE50+ does not require external compensation components. Its current-mode control architecture incorporates internal slope compensation and a stable loop design that guarantees stability with standard output capacitor ESR values - eliminating the need for external RC networks and reducing BOM count and layout complexity.
How is the MAX16904RAUE50+ protected against overcurrent and thermal faults?
The MAX16904RAUE50+ provides cycle-by-cycle peak current limiting at 1.05A (typ), automatic shutdown if OUTS falls below 1.5V during overload, and thermal shutdown at +175°C junction temperature with 15°C hysteresis. After fault clearance, it attempts soft-start recovery every 30ms until regulation is restored - all verified in the Detailed Description and Electrical Characteristics sections.
Can the MAX16904RAUE50+ operate during automotive cold-crank conditions?
Yes, the MAX16904RAUE50+ operates during cold-crank events: it tolerates input transients up to +42V and maintains regulation down to ~5.3V input (97% duty cycle) via periodic low-side FET pulsing to refresh the BST capacitor - enabling uninterrupted 5V output even when battery voltage dips to 5.5V, as validated in Typical Operating Characteristics Figure toc12.
What is the recommended PCB layout practice for the exposed pad of the MAX16904RAUE50+?
The exposed pad of the MAX16904RAUE50+ must be soldered to a large PGND copper plane on both top and bottom layers, connected via multiple thermal vias, and tied to the output capacitor's PGND return point - not to GND elsewhere. This configuration achieves θJA = 38.3°C/W and prevents thermal runaway under 600mA continuous load, per Package Information and PCB Layout Guidelines sections.
MAX16904RAUE50+ 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):
- 5V
- 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
MAX16904RAUE50+ FAQ
1.How can I place an order for MAX16904RAUE50+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904RAUE50+ 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 MAX16904RAUE50+ reliable?
The price and inventory of MAX16904RAUE50+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904RAUE50+ is usually 5 days.
3.What payment methods are accepted for MAX16904RAUE50+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904RAUE50+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904RAUE50+?
MAX16904RAUE50+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904RAUE50+ 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 MAX16904RAUE50+?
For technical support, including MAX16904RAUE50+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904RAUE50+ requirements.
6.How does Aetrix verify that MAX16904RAUE50+ is sourced from the original manufacturer or authorized distributors?
All MAX16904RAUE50+ 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 MAX16904RAUE50+ meets industry standards.
7.What is the process for return or replacement of MAX16904RAUE50+?
All MAX16904RAUE50+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904RAUE50+, 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 MAX16904RAUE50+ part is unused and in its original packaging.
Return procedure for MAX16904RAUE50+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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