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Analog Devices Inc./Maxim Integrated MAX16904SAUE33/V+
- Part No.:
- MAX16904SAUE33/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16904SAUE33/V+.pdf
- Description:
- IC REG BUCK 3.3V 600MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,726
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Product details
Overview
The MAX16904SAUE33/V+ from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output at fixed 3.3V with input voltage range +3.5V to +28V, 2.1MHz switching frequency, and 25μA no-load quiescent current-designed for automotive power rails requiring high-voltage tolerance and AEC-Q100 compliance.
For engineers reviewing the MAX16904SAUE33/V+ datasheet, MAX16904SAUE33/V+ pinout, MAX16904SAUE33/V+ application, or MAX16904SAUE33/V+ equivalent, key selection considerations include its spread-spectrum EMI reduction, -40°C to +125°C operation, 16-pin TSSOP-EP package with exposed pad, and compatibility with cold-crank automotive transients up to +42V.
Technical Context
The MAX16904SAUE33/V+ implements current-mode control with internal slope compensation and requires no external loop compensation. Its 2.1MHz fixed-frequency PWM mode, SKIP mode (25μA IQ), and external synchronization capability enable dynamic efficiency optimization across load conditions from microamps to 600mA.
It integrates high-side and low-side DMOS switches (RON,HS = 400–800mΩ, RON,LS = 250–450mΩ), features 97% dropout duty cycle, thermal shutdown at +175°C, and PGOOD monitoring with 91–94% falling/rising thresholds-ensuring robust regulation in automotive battery-supplied systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.5% (fixed-frequency mode), ±4.0% (SKIP mode) |
| Input Voltage Range | +3.5V to +28V continuous; withstands +42V transients ≤1s |
| Max Output Current | 600mA continuous; overcurrent limit at 0.85–1.22A peak |
| Switching Frequency | 2.1MHz typical; supports SYNC input (1.8–2.6MHz) and spread-spectrum (+6%) |
| Quiescent Current | 25μA typical in SKIP mode at no load; 4–8μA in shutdown |
| Operating Temperature | -40°C to +125°C ambient; AEC-Q100 qualified |
| Package | 16-pin TSSOP-EP (5mm × 4.4mm) with exposed thermal pad connected to PGND |
Pinout & Package
MAX16904SAUE33/V+ uses a thermally enhanced 16-pin TSSOP-EP package (U16E+3 outline) with exposed pad soldered to PGND for thermal management. Pin 1 is BST; pins 2 & 3 are SUP; pins 4 & 5 are LX; pins 6 & 7 are PGND; pins 9 & 10 & 16 are N.C.; EP must be connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor node | Drives high-side FET gate; requires 0.1µF ceramic capacitor to LX |
| SUP (pins 2,3) | Main power input | Accepts +3.5V to +28V; connect 4.7µF ceramic cap close to both pins |
| LX (pins 4,5) | Switching node | Connects to inductor; high-impedance when off; tie both pins together |
| PGND (pins 6,7) | Power ground return | Low-impedance path for LX current; tie both pins and EP to same plane |
| OUTS (pin 8) | Voltage feedback sense | Connects to output capacitor; bypass with ≥10µF X7R ceramic to PGND |
| PGOOD (pin 11) | Open-drain status flag | Pulls low when VOUT < 91% nominal; requires external 20kΩ pull-up |
| SYNC (pin 12) | Frequency control input | GND/unconnected → SKIP mode; BIAS/external clock → forced PWM |
| BIAS (pin 13) | Internal LDO output | +5V logic supply; bypass with 2.2µF ceramic to GND |
| GND (pin 14) | Analog reference ground | Separate from PGND; connect only at output capacitor return point |
| EN (pin 15) | Enable control | High-voltage compatible (3.3V–42V logic); no internal pullup/pulldown |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | +6% frequency dithering reduces peak EMI emissions without compromising AM-band immunity |
| Ultra-low quiescent current | 25μA in SKIP mode enables >10-year battery life in always-on automotive modules |
| 97% dropout operation | Maintains regulation during cold-crank events down to ~3.5V input at full load |
| Integrated thermal protection | Shuts down at +175°C junction temperature with 15°C hysteresis for reliable recovery |
| AEC-Q100 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface in door module under 12V battery with cold-crank dips to 3.5V. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying core logic and communication peripherals. Use Value: Maintains regulation during 10ms 3.5V cold-crank pulses while drawing only 25μA in standby between wake events. | Use Scenario: Supplies isolated 3.3V rail for digital I/O expansion cards in factory automation controllers operating from 24V industrial bus. IC Role / Device Role / Timing Role: High-efficiency local DC-DC converter replacing linear regulators to reduce heat in confined enclosures. Use Value: Delivers 600mA at >90% efficiency across 12–28V input range, eliminating need for heatsinks in DIN-rail mounted PLCs. |
| Automotive Camera Module | Military Vehicle Data Logger |
Use Scenario: Powers image sensor and ISP in rear-view camera exposed to engine bay temperatures up to +125°C ambient. IC Role / Device Role / Timing Role: Single-chip 3.3V power solution with integrated PGOOD for system health monitoring. Use Value: AEC-Q100 qualification and thermal shutdown ensure safe operation during sustained high-temp exposure. | Use Scenario: Provides regulated 3.3V for ARM-based data acquisition in armored vehicle black boxes subjected to vibration and wide input transients. IC Role / Device Role / Timing Role: Robust front-end buck converter tolerant of +42V load-dump spikes and -40°C startup. Use Value: Withstands MIL-STD-1275B electrical transients without external TVS, reducing BOM count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRTWRQ1 | 4.5–36V input, 8A output, 2.1MHz, no spread-spectrum, QFN-16 | Higher current, larger package, no cold-crank optimized dropout behavior | Choose for higher-power ADAS ECUs needing >1A; not drop-in due to different pinout and control scheme |
| TPS62933QDRLRQ1 | 3–18V input, 3A output, 2.25MHz, 15μA IQ, WSON-10 | Narrower VIN range, lower max current, smaller footprint, no +42V transient rating | Prefer for space-constrained infotainment subsystems where input stays within 12V±10%; verify cold-crank margin separately |
Compared with LM61480QRTWRQ1 and TPS62933QDRLRQ1, the MAX16904SAUE33/V+ uniquely combines AEC-Q100 qualification, +42V transient tolerance, spread-spectrum EMI control, and 25μA SKIP-mode IQ in a 16-pin TSSOP-making it optimal for cost-sensitive, thermally constrained 600mA automotive rails where cold-crank resilience is mandatory.
Availability
MAX16904SAUE33/V+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and military data loggers requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for MAX16904SAUE33/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 MAX16904 product line delivers compact, high-voltage synchronous buck converters optimized for automotive battery-powered systems requiring AEC-Q100 compliance, cold-crank operation, and low EMI in space-constrained layouts.
FAQ
What is the output voltage accuracy of the MAX16904SAUE33/V+ under full load and high temperature?
The MAX16904SAUE33/V+ maintains output voltage within ±2.5% of 3.3V across 0–600mA load and -40°C to +125°C ambient when operating in fixed-frequency mode. In SKIP mode, accuracy degrades slightly to ±4.0% under the same conditions, as specified in the Electrical Characteristics table on page 3 of the datasheet.
Does the MAX16904SAUE33/V+ require external compensation components?
No, the MAX16904SAUE33/V+ uses internal current-mode control with built-in slope compensation and does not require external compensation network components. This simplifies design and improves stability across input voltage and load variations without tuning.
How does the spread-spectrum feature work in the MAX16904SAUE33/V+?
The MAX16904SAUE33/V+ implements spread-spectrum frequency modulation by varying its internal 2.1MHz oscillator frequency by +6% only in the positive direction. This dithering reduces peak radiated EMI without shifting into the AM radio band (1.8–1.9MHz), and remains active only during internally generated switching-not when synchronized externally via SYNC.
Can the MAX16904SAUE33/V+ operate during automotive cold-crank conditions?
Yes, the MAX16904SAUE33/V+ sustains regulation during cold-crank events down to 3.5V input at full 600mA load by operating at up to 97% duty cycle. Its UVLO threshold is 2.8–3.2V with 0.4V hysteresis, and it tolerates input transients up to +42V for ≤1 second-meeting ISO 16750-2 requirements.
What is the recommended PCB layout practice for thermal management of the MAX16904SAUE33/V+?
For optimal thermal performance, solder the exposed pad (EP) of the MAX16904SAUE33/V+ directly to a large PGND copper plane on both top and bottom PCB layers, using multiple thermal vias. Connect EP exclusively to the PGND return of the output capacitor-never to signal GND-and isolate high-current LX/SUP paths from sensitive analog traces.
MAX16904SAUE33/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:
- Active
- 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
MAX16904SAUE33/V+ FAQ
1.How can I place an order for MAX16904SAUE33/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904SAUE33/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 MAX16904SAUE33/V+ reliable?
The price and inventory of MAX16904SAUE33/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904SAUE33/V+ is usually 5 days.
3.What payment methods are accepted for MAX16904SAUE33/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904SAUE33/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904SAUE33/V+?
MAX16904SAUE33/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904SAUE33/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 MAX16904SAUE33/V+?
For technical support, including MAX16904SAUE33/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904SAUE33/V+ requirements.
6.How does Aetrix verify that MAX16904SAUE33/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16904SAUE33/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 MAX16904SAUE33/V+ meets industry standards.
7.What is the process for return or replacement of MAX16904SAUE33/V+?
All MAX16904SAUE33/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904SAUE33/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 MAX16904SAUE33/V+ part is unused and in its original packaging.
Return procedure for MAX16904SAUE33/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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