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Analog Devices Inc./Maxim Integrated MAX16904RATB33/V+T
- Part No.:
- MAX16904RATB33/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX16904RATB33/V+T.pdf
- Description:
- IC REG BUCK 3.3V 600MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,263
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Product details
Overview
The MAX16904RATB33/V+T from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output at fixed 3.3V with input range +3.5V to +28V, 2.1MHz switching frequency, 25μA no-load quiescent current, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX16904RATB33/V+T datasheet, MAX16904RATB33/V+T pinout, MAX16904RATB33/V+T application, or MAX16904RATB33/V+T equivalent, this page provides verified package mapping (10-pin TDFN-EP), confirmed thermal performance (θJA = 41°C/W), validated EMI mitigation features (spread-spectrum option disabled), and real-world load transient response data for 3.3V/600mA automotive systems.
Technical Context
The MAX16904RATB33/V+T implements current-mode control with integrated high-side (400–800mΩ RDS(ON)) and low-side (250–450mΩ) MOSFETs, enabling dropout operation at 97% duty cycle. Its 80ns minimum on-time supports regulation down to 3.3V output even with 18V input.
Three SYNC-configurable modes-SKIP (25μA IQ), forced fixed-frequency (2.1MHz), and external synchronization (1.8–2.6MHz)-allow dynamic trade-offs between light-load efficiency and EMI control. The PGOOD open-drain output monitors VOUT with 88–98% threshold hysteresis and 10μs debounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.5% (fixed-frequency mode), ±4.0% (SKIP mode) across -40°C to +125°C |
| Input Voltage Range | +3.5V to +28V continuous; withstands +42V transients ≤1s for cold-crank immunity |
| Max Output Current | 600mA continuous; peak current limit 0.85–1.22A with overcurrent shutdown |
| Switching Frequency | 2.1MHz typical (1.925–2.275MHz); supports SYNC input 1.8–2.6MHz for EMI reduction |
| Quiescent Current | 25μA typical in SKIP mode at no load; 1mA in continuous no-switching state |
| Thermal Protection | Thermal shutdown at +175°C (±5°C), with 15°C hysteresis for automatic recovery |
| Package | 10-pin TDFN-EP (3mm × 3mm × 0.75mm); exposed pad soldered to PGND for θJA = 41°C/W |
Pinout & Package
MAX16904RATB33/V+T uses a thermally enhanced 10-pin TDFN-EP package (outline 21-0137, land pattern 90-0003) with exposed pad connected to PGND. Pin 1 is BST; pins 2 and 3 are SUP and LX respectively; pin 10 is EN. N.C. pins are absent - all 10 pins are functional.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor node | Drives high-side FET gate; requires 0.1µF ceramic capacitor to LX for proper gate charge replenishment |
| SUP | Main power input | Accepts +3.5V to +28V; connect 4.7µF ceramic capacitor directly to PGND with minimal trace length |
| LX | Switching node | Connects to inductor; high-impedance when off; critical for EMI control and layout stability |
| PGND | Power ground return | Carries high di/dt currents; must be tied to exposed pad and kept separate from analog GND until single-point connection at OUTS capacitor |
| OUTS | Voltage feedback sense | Monitors regulated output; bypass with ≥10µF X7R ceramic capacitor to PGND for stability |
| PGOOD | Open-drain status flag | Pulls low when VOUT < 91% nominal; requires external 20kΩ pullup to BIAS or system rail |
| SYNC | Mode control input | GND/unconnected enables SKIP mode; BIAS or clock signal forces fixed-frequency operation |
| BIAS | Internal LDO output | +5V supply for internal logic; bypass with 2.2µF ceramic capacitor to GND |
| GND | Analog reference ground | Low-noise reference for error amplifier; connect to PGND only at OUTS capacitor return |
| EN | Enable control | High-voltage compatible (0.6V–42V); drives device ON above 2.4V; no internal pullup/pulldown |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade thermal operation | Rated for -40°C to +125°C ambient; junction limited to +150°C with thermal shutdown at +175°C |
| AM-band interference avoidance | 2.1MHz fixed frequency ensures no switching harmonics fall within 530–1710kHz AM radio band |
| Dropout-capable regulation | Maintains 3.3V output at >97% duty cycle during low-input conditions (e.g., automotive cold-crank) |
| Ultra-low standby consumption | 25μA quiescent current in SKIP mode enables >1-year battery life in always-on vehicle modules |
| Robust input transient tolerance | Withstands +42V transients per ISO 7637-2 Pulse 5a without latch-up or damage |
| AEC-Q100 qualification | Qualified to Grade 0 (-40°C to +150°C junction) per Rev G, including HTOL, TC, ESD, and mechanical stress tests |
Applications
| Infotainment Power Supply | ADAS Camera Module Rail |
|---|---|
Use Scenario: Providing stable 3.3V to SoC I/O, display interface, and audio codecs in head-unit systems subject to battery voltage sag and load dump. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator with PGOOD monitoring for system power sequencing and fault reporting. Use Value: 25μA quiescent current extends ignition-off battery runtime; 97% dropout supports operation during cranking (6V–8V). |
Use Scenario: Powering image sensor, ISP, and MIPI PHY in forward-facing camera modules requiring low EMI and fast transient response. IC Role / Device Role / Timing Role: High-frequency (2.1MHz) synchronous buck delivering clean 3.3V with <50mV AC-coupled load step deviation. Use Value: Small 3.3µH inductor and 10µF output cap enable compact layout; spread-spectrum option (not enabled on this variant) available for stricter EMI limits. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Regulating 3.3V for microcontroller, CAN transceivers, and sensor interfaces in door modules and lighting controllers. IC Role / Device Role / Timing Role: Input-tolerant buck converter interfacing directly to 12V/24V vehicle battery with undervoltage lockout (2.8–3.2V). Use Value: +42V transient tolerance eliminates need for upstream TVS; EN pin compatibility with 3.3V MCU GPIO simplifies enable logic. |
Use Scenario: Generating 3.3V for LTE modem, GNSS receiver, and secure element in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: AEC-Q100 qualified DC-DC with PGOOD signaling to host processor for brownout detection and graceful shutdown. Use Value: Thermal shutdown with 15°C hysteresis prevents thermal runaway in sealed enclosures; TDFN-EP package enables high-power density PCB design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20004AATB33/V+ | Same 10-pin TDFN-EP package, 3.3V output, but higher 1A rating and 2.2MHz switching; includes reverse-current protection | Preferred for designs needing >600mA or bidirectional current blocking (e.g., backup power paths) | Select MAX20004AATB33/V+ if future-proofing for higher load or reverse-current isolation is required |
| TPS62130ARGTR | 3.3V fixed-output buck in 16-pin QFN; 3V–17V input; 3A rating; no AEC-Q100 qualification; 2.5MHz switching | Suitable for industrial or consumer applications where automotive qualification is not mandatory | Choose TPS62130ARGTR only for non-automotive use cases due to lack of AEC-Q100 and lower input voltage ceiling |
Compared with MAX20004AATB33/V+, the MAX16904RATB33/V+T offers lower cost and proven cold-crank robustness at 600mA, while TPS62130ARGTR trades automotive compliance for higher current and broader commercial support - neither is pin-compatible, requiring PCB redesign.
Availability
MAX16904RATB33/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply under AEC-Q100-compliant manufacturing and extended temperature operation.
Supply support for MAX16904RATB33/V+T 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 environments including automotive, industrial, and communications systems.
The MAX16904 belongs to Maxim's automotive-grade power management portfolio, engineered specifically for high-input-voltage DC-DC conversion in vehicles - emphasizing cold-crank resilience, low quiescent current, and AEC-Q100 reliability.
FAQ
What is the exact output voltage tolerance of the MAX16904RATB33/V+T across temperature and load?
The MAX16904RATB33/V+T delivers 3.3V with ±2.5% accuracy in forced fixed-frequency mode and ±4.0% in SKIP mode, specified over full -40°C to +125°C operating range and 0–600mA load. These tolerances include line, load, and temperature effects - no external trimming is required as the output is factory-trimmed.
Does the MAX16904RATB33/V+T support external synchronization, and what is its valid SYNC frequency range?
Yes, the MAX16904RATB33/V+T supports external synchronization via the SYNC pin, accepting clock inputs from 1.8MHz to 2.6MHz. When SYNC is driven by an external source (e.g., system master clock), the device operates in forced PWM mode with tight frequency control - critical for EMI reduction in multi-rail systems.
How does the MAX16904RATB33/V+T behave during automotive cold-crank conditions (e.g., 6V input)?
During cold-crank (input as low as 6V), the MAX16904RATB33/V+T maintains 3.3V output by operating at >97% duty cycle. It sustains regulation using periodic low-side FET activation (150ns every 6.5μs) to recharge the BST capacitor - ensuring gate drive integrity without output collapse or restart cycles.
Is the MAX16904RATB33/V+T pin-compatible with other variants in the MAX16904 family, such as the 5V or spread-spectrum versions?
Yes, all MAX16904 variants - including MAX16904RATB50/V+, MAX16904SATB33/V+, and MAX16904RATB33/V+T - share identical 10-pin TDFN-EP pinout and footprint (outline 21-0137). Only the top-mark (AVX for this part) and internal trim differ; no PCB change is needed when substituting within the same package type.
What thermal derating applies to the MAX16904RATB33/V+T at elevated ambient temperatures?
The MAX16904RATB33/V+T has a junction-to-ambient thermal resistance (θJA) of 41°C/W on a standard four-layer board. At 70°C ambient, its maximum continuous power dissipation is 1951mW; above that, it derates linearly at 24.4mW/°C - limiting usable output power to ~1.3W at 100°C ambient under typical PCB copper area.
MAX16904RATB33/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 10-TDFN (3x3)
MAX16904RATB33/V+T FAQ
1.How can I place an order for MAX16904RATB33/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904RATB33/V+T 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 MAX16904RATB33/V+T reliable?
The price and inventory of MAX16904RATB33/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904RATB33/V+T is usually 5 days.
3.What payment methods are accepted for MAX16904RATB33/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904RATB33/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904RATB33/V+T?
MAX16904RATB33/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904RATB33/V+T 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 MAX16904RATB33/V+T?
For technical support, including MAX16904RATB33/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904RATB33/V+T requirements.
6.How does Aetrix verify that MAX16904RATB33/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16904RATB33/V+T 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 MAX16904RATB33/V+T meets industry standards.
7.What is the process for return or replacement of MAX16904RATB33/V+T?
All MAX16904RATB33/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904RATB33/V+T, 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 MAX16904RATB33/V+T part is unused and in its original packaging.
Return procedure for MAX16904RATB33/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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