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Analog Devices Inc./Maxim Integrated MAX16904SATB50/V+T
- Part No.:
- MAX16904SATB50/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX16904SATB50/V+T.pdf
- Description:
- IC REG BUCK 5V 600MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,108
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Product details
Overview
The MAX16904SATB50/V+ from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output at fixed 5.0V with integrated high-side and low-side MOSFETs, operating from +3.5V to +28V input and tolerating +42V transients. It features 2.1MHz switching frequency, 25μA quiescent current in SKIP mode, PGOOD monitoring, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX16904SATB50/V+ datasheet, MAX16904SATB50/V+ pinout, MAX16904SATB50/V+ application, or MAX16904SATB50/V+ equivalent, this page provides verified technical context, package-specific pin functions, real-world automotive/industrial use cases, and validated alternative options - all grounded in the official MAX16904 datasheet Rev 15 (12/2018) and Maxim's ordering guide.
Technical Context
The MAX16904SATB50/V+ implements current-mode control with internal slope compensation and no external compensation required. Its 2.1MHz fixed-frequency operation (with spread-spectrum enabled) avoids AM-band interference and enables compact 4.7μH inductors and ceramic capacitors.
It supports three operational modes via the SYNC pin: forced PWM (for EMI control), SKIP mode (25μA IQ), and external synchronization. Dropout operation at >97% duty cycle and thermal shutdown at +175°C ensure robustness in cold-crank and overtemperature conditions typical of automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2.5% (fixed-frequency mode), ±4.0% (SKIP mode) - factory-trimmed, no external feedback resistors needed. |
| Input Voltage Range | +3.5V to +28V continuous; withstands +42V transients ≤1s - suitable for 12V/24V automotive battery rails including load dump. |
| Max Output Current | 600mA continuous; peak current limit 1.05A - supports microcontroller cores, sensors, and CAN transceivers. |
| Switching Frequency | 2.1MHz (±6.25%) with optional +6% spread-spectrum modulation - reduces radiated EMI without compromising AM-band immunity. |
| Quiescent Current | 25μA typical in SKIP mode at no load - extends battery life in always-on vehicle modules (e.g., telematics, body control units). |
| Operating Temperature | -40°C to +125°C junction - qualified per AEC-Q100 Grade 1, enabling under-hood and infotainment system deployment. |
| Package | 10-pin TDFN-EP (3mm × 3mm × 0.75mm) with exposed pad - thermally enhanced θJA = 41°C/W on 4-layer board. |
Pinout & Package
MAX16904SATB50/V+ uses a thermally enhanced 10-pin TDFN-EP package (outline 21-0137, land pattern 90-0003), with exposed pad soldered to PGND for optimal thermal performance. Pin 1 is BST; pins 9 and 10 are N.C.; EP must be connected to PGND - not used as sole ground path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor node | Drives high-side MOSFET gate; requires 0.1µF ceramic capacitor between BST and LX to sustain >97% duty cycle in dropout. |
| SUP | Main input supply | Accepts +3.5V to +28V; connect 4.7µF ceramic capacitor directly to PGND; withstands +42V transients. |
| LX | Switching node | Connects to inductor; high-impedance when off; critical for EMI layout - keep trace short and away from analog signals. |
| PGND | Power ground return | High-current return path for LX and SUP; must be tied to EP and GND at single point near output capacitor. |
| OUTS | Voltage sense input | Monitors regulated output; bypass with ≥10µF X7R ceramic to PGND - determines regulation accuracy and transient response. |
| PGOOD | Open-drain power-good flag | Asserts high when VOUT ≥93% nominal (4.65V); pulls low at ≤91% (4.55V); requires external 20kΩ pull-up. |
| SYNC | Mode control & sync input | GND/unconnected → SKIP mode; BIAS or clock signal → forced PWM; enables dynamic mode switching during operation. |
| BIAS | Internal LDO output | +5V logic supply; powers internal circuitry; bypass with 2.2µF ceramic to GND - also usable as PGOOD pull-up source. |
| GND | Analog ground reference | Low-noise reference for error amplifier and bandgap; tie to PGND at single point near OUTS capacitor. |
| EN | Enable input | High-voltage compatible (3.3V–42V logic); drives high for operation; no internal pullup/pulldown - minimizes standby leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | +6% frequency dithering active only in internally generated mode - reduces peak EMI by up to 10dB without affecting AM-band compliance. |
| Ultra-low quiescent current | 25μA in SKIP mode at no load - achieved by disabling internal LDO and non-essential blocks while maintaining regulation. |
| Dropout operation | 97% max duty cycle with periodic low-side FET activation every 6.5μs - sustains 5V output down to ~5.2V input (e.g., cold-crank at 6V battery). |
| Integrated overcurrent protection | 1.05A peak current limit with automatic soft-start retry every 30ms - prevents latch-up during short circuits without external components. |
| AEC-Q100 qualification | Grade 1 (-40°C to +125°C) with HBM ±2kV ESD - validated for automotive power management in ADAS, infotainment, and body electronics. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Hub Power |
|---|---|
Use Scenario: Powers microcontroller, LIN transceiver, and door-lock actuators from 12V battery with cold-crank resilience. IC Role / Device Role / Timing Role: Primary 5V rail regulator with PGOOD sequencing and transient tolerance up to +42V. Use Value: Enables single-chip 5V supply meeting ISO 7637-2 Pulse 5a (load dump) and cold-crank (6V min) requirements without external TVS or LDO. |
Use Scenario: Supplies 5V to MEMS accelerometers, temperature sensors, and RS-485 transceivers in factory automation nodes. IC Role / Device Role / Timing Role: High-efficiency buck converter with low IQ for battery-backed or energy-harvested sensor nodes. Use Value: 25μA no-load IQ extends 10-year battery life in wireless sensor networks; 2.1MHz switching allows <3mm² total solution size. |
| Automotive Telematics Unit (TCU) | Medical Portable Diagnostic Device |
Use Scenario: Generates stable 5V for GPS module, cellular modem, and MCU in always-on vehicle connectivity systems. IC Role / Device Role / Timing Role: Always-on power stage with enable-controlled wake/sleep and PGOOD-based system reset coordination. Use Value: SKIP-to-PWM mode switching via SYNC allows dynamic efficiency optimization during data bursts vs. idle listening states. |
Use Scenario: Powers ADC, display driver, and Bluetooth SoC in handheld ultrasound or glucose monitor with Li-ion battery input. IC Role / Device Role / Timing Role: Input-wide buck regulator supporting both USB charging (5V) and battery discharge (3.2–4.2V) without reconfiguration. Use Value: +3.5V to +28V input range accommodates direct USB 5V, 9V PD, or 12V wall adapter - eliminating need for pre-regulator stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | 3.5–36V input, 8A output, 2.1MHz, no spread-spectrum, QFN-16 package | Higher current capability but larger footprint and higher IQ (15μA vs. 25μA in SKIP) | Select when >600mA load or wider input (>28V) is required; not drop-in due to different pinout and thermal pad layout. |
| TPS62903RTER | 3–18V input, 3A output, 1–2.5MHz adjustable, 12-pin WQFN, no AEC-Q100 | Lower input voltage ceiling and no automotive qualification; includes I2C programmability | Prefer for industrial IoT where programmable VOUT and smaller solution size matter more than automotive compliance. |
Compared with LM61480RQWR and TPS62903RTER, the MAX16904SATB50/V+ uniquely combines AEC-Q100 Grade 1 qualification, +42V transient tolerance, spread-spectrum EMI reduction, and 10-pin TDFN packaging - making it the only option qualified for direct integration into automotive front-end power domains without derating or additional protection.
Availability
MAX16904SATB50/V+ is available at Aetrix Electronics and suitable for automotive body control, industrial sensor hubs, telematics units, and portable medical devices requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX16904SATB50/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 - emphasizing reliability, integration, and AEC-Q100 compliance.
The MAX16904 product line delivers high-voltage, low-IQ synchronous buck converters optimized for automotive power rails - specifically targeting cold-crank resilience, EMI-sensitive infotainment systems, and space-constrained ECUs.
FAQ
What is the exact output voltage tolerance of the MAX16904SATB50/V+ in fixed-frequency mode?
The MAX16904SATB50/V+ delivers a factory-trimmed 5.0V output with ±2.5% tolerance under fixed-frequency operation (6V ≤ VSUP ≤ 18V, ILOAD = 0–600mA, -40°C to +125°C). This specification is guaranteed across full temperature and load range - no external resistor network is required or supported, as the feedback is internal.
Does the MAX16904SATB50/V+ require external compensation components?
No, the MAX16904SATB50/V+ uses current-mode control with internal slope compensation and does not require external compensation components. Its loop stability is inherent to the architecture - confirmed by the absence of COMP or FB pins and validation in the datasheet's Typical Operating Circuits and Applications Information sections.
How does the spread-spectrum feature work in the MAX16904SATB50/V+?
The MAX16904SATB50/V+ implements +6% spread-spectrum modulation exclusively when operating in internally generated switching mode (SYNC unconnected or grounded). The frequency varies only upward from 2.1MHz - ensuring the lowest edge remains above 1.8MHz to avoid AM-band interference while reducing peak radiated emissions by spreading energy across a narrow band.
Can the MAX16904SATB50/V+ operate during automotive cold-crank conditions?
Yes, the MAX16904SATB50/V+ sustains regulation down to ~5.2V input via >97% duty cycle operation - achieved by periodically activating the low-side FET every 6.5μs to recharge the BST capacitor. This behavior is explicitly documented in the Detailed Description section for dropout conditions and validated in the UNDERVOLTAGE PULSE (COLD CRANK) waveform (toc12).
What is the recommended PCB layout practice for the exposed pad (EP) of the MAX16904SATB50/V+?
The exposed pad (EP) of the MAX16904SATB50/V+ must be soldered to a large copper plane connected to PGND - not used as the sole ground path. Maxim recommends connecting EP to PGND at the return terminal of the output capacitor, using multiple vias to inner-layer PGND planes, and exposing the copper on top/bottom layers to maximize thermal conduction per JEDEC JESD51-7 testing methodology.
MAX16904SATB50/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:
- 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):
- 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:
- 10-TDFN (3x3)
MAX16904SATB50/V+T FAQ
1.How can I place an order for MAX16904SATB50/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904SATB50/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 MAX16904SATB50/V+T reliable?
The price and inventory of MAX16904SATB50/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 MAX16904SATB50/V+T is usually 5 days.
3.What payment methods are accepted for MAX16904SATB50/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904SATB50/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904SATB50/V+T?
MAX16904SATB50/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904SATB50/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 MAX16904SATB50/V+T?
For technical support, including MAX16904SATB50/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904SATB50/V+T requirements.
6.How does Aetrix verify that MAX16904SATB50/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16904SATB50/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 MAX16904SATB50/V+T meets industry standards.
7.What is the process for return or replacement of MAX16904SATB50/V+T?
All MAX16904SATB50/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904SATB50/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 MAX16904SATB50/V+T part is unused and in its original packaging.
Return procedure for MAX16904SATB50/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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