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Analog Devices Inc./Maxim Integrated MAX16904RATB50/V+T
- Part No.:
- MAX16904RATB50/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX16904RATB50/V+T.pdf
- Description:
- IC REG BUCK 5V 600MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,629
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Product details
Overview
The MAX16904RATB50/V+T from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output with 5.0V fixed regulation, operating from +3.5V to +28V input and featuring 2.1MHz switching frequency, 25μA no-load quiescent current, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX16904RATB50/V+T datasheet, MAX16904RATB50/V+T pinout, MAX16904RATB50/V+T application, or MAX16904RATB50/V+T equivalent, this device serves as a high-voltage-input, thermally robust, spread-spectrum-capable mini-buck regulator optimized for EMI-sensitive automotive infotainment and ADAS subsystems requiring stable 5V/600mA under cold-crank and load-dump conditions.
Technical Context
The MAX16904RATB50/V+T implements current-mode control with integrated high-side (400–800mΩ) and low-side (250–450mΩ) DMOS switches, enabling dropout operation at 97% duty cycle and supporting input transients up to +42V. Its 2.1MHz internal oscillator supports three modes: forced fixed-frequency (FFF), SKIP mode (25μA IQ), and external synchronization via SYNC pin.
It integrates undervoltage lockout (3.0V typ), thermal shutdown (+175°C), overcurrent protection (1.05A typ), and open-drain PGOOD with 91–94% falling threshold. The device uses internal soft-start (8ms typ), requires no external compensation, and features a bootstrap (BST) gate-drive circuit for high-side FET control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2.5% (fixed-frequency mode), ±4.0% (SKIP mode); enables direct replacement of LDOs in 5V rail systems. |
| Input Voltage Range | +3.5V to +28V continuous; tolerates +42V transients ≤1s - meets ISO 7637-2 Pulse 5a for automotive battery line surges. |
| Max Output Current | 600mA continuous; peak current limit 1.05A - supports microcontroller cores, CAN transceivers, and sensor interfaces. |
| Switching Frequency | 2.1MHz (1.925–2.275MHz typ); supports 1.8–2.6MHz sync range - avoids AM band (0.53–1.71MHz) and enables <3.3mm inductors. |
| Quiescent Current | 25μA (typ) in SKIP mode at no load - extends battery life in always-on vehicle modules (e.g., telematics, body controllers). |
| Operating Temp | −40°C to +125°C ambient - qualified per AEC-Q100 Grade 1; junction limit +150°C ensures reliability in engine bay proximity. |
| Package | 10-pin TDFN-EP (3mm × 3mm × 0.75mm); exposed pad soldered to PGND - θJA = 41°C/W enables >1.9W dissipation at +70°C ambient. |
Pinout & Package
MAX16904RATB50/V+T is housed in a thermally enhanced 10-pin TDFN-EP package (3mm × 3mm, 0.75mm height) with exposed pad connected to PGND. Pin 1 is BST; pins 2 and 3 are SUP and LX respectively; pin 10 is EN. All N.C. pins (9, 10 in TSSOP mapping) are unconnected and must remain floating.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor node | Drives high-side FET gate; requires 0.1µF ceramic capacitor between BST and LX to sustain >97% duty cycle in dropout. |
| SUP | Main power input | Accepts +3.5V to +28V; connects to 4.7µF input cap near pin; withstands +42V transients - primary interface to vehicle battery rail. |
| LX | Switching node | Connects to inductor and diode-free synchronous rectifier; high dv/dt node - requires short, low-inductance layout to minimize EMI. |
| PGND | Power ground return | High-current return path for LX and input/output caps; must be tied to exposed pad and isolated from analog GND until single-point connection at OUTS bypass cap. |
| OUTS | Voltage feedback sense | Resistor-divider input referenced to PGND; monitors regulated 5.0V output; bypassed with ≥10µF X7R ceramic for stability. |
| PGOOD | Open-drain status signal | Pulls low when VOUT drops below 91% nominal; used for system power sequencing and fault reporting in ECUs. |
| SYNC | Mode control & sync input | GND/unconnected → SKIP mode; BIAS or external clock → forced PWM; enables dynamic efficiency/EMI trade-off during runtime. |
| BIAS | Internal 5V LDO output | Supplies internal logic; bypassed with 2.2µF ceramic; can pull up PGOOD or drive external logic - eliminates need for auxiliary bias supply. |
| GND | Analog reference ground | Low-noise reference for error amplifier and bandgap; must connect to PGND only at OUTS capacitor's PGND terminal to avoid noise coupling. |
| EN | Enable control | High-voltage compatible (0.6V–2.4V logic thresholds); accepts +3.3V MCU signals or direct battery monitoring - enables key-off sleep control. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum option | Enabled on MAX16904SATB variants; ±6% frequency dither reduces peak EMI by >10dB - critical for CISPR 25 Class 5 compliance in infotainment head units. |
| Ultra-low IQ SKIP mode | 25μA typical no-load current - cuts standby power by >90% vs. standard PWM buck, extending parking-mode runtime in ADAS cameras. |
| 97% dropout duty cycle | Maintains 5.0V output down to VIN = 5.15V (for 5V out); achieved via periodic low-side FET activation every 6.5μs - sustains operation during cold-crank (4.5V battery). |
| AEC-Q100 Grade 1 | Qualified for −40°C to +125°C ambient; includes HTOL, TC, UHAST, and ESD (±2kV HBM) - meets functional safety requirements for ASIL-B power domains. |
| Integrated current-limit protection | 1.05A typical peak current limit with automatic hiccup restart - prevents damage during shorted USB ports or sensor cable faults without external current-sense resistors. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display driver, and audio codec in head unit with 12V battery input subject to load dump and cold-crank. IC Role / Device Role / Timing Role: Primary 5V/600mA buck regulator; provides clean, sequenced power with PGOOD confirmation before SoC boot. Use Value: 2.1MHz switching allows compact 3.3µH inductor and 10µF ceramic output cap; spread-spectrum option suppresses radiated emissions near FM radio band. |
Use Scenario: Supplies image sensor, ISP, and MIPI interface in rear-view camera exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: High-reliability 5V rail generator with thermal shutdown and -40°C startup capability; PGOOD enables fail-safe video blanking. Use Value: AEC-Q100 qualification and 125°C operation ensure uninterrupted function at 85°C PCB temp; 25μA IQ extends parking surveillance time. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
|
Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in door module with intermittent 12V supply and ESD exposure. IC Role / Device Role / Timing Role: Input-transient-tolerant 5V source; EN pin controlled by MCU to enter deep-sleep state during vehicle off. Use Value: +42V transient tolerance eliminates need for external TVS; 0.6V EN threshold enables direct GPIO control without level shifters. |
Use Scenario: Generates 5V for cellular modem, GNSS receiver, and secure element in always-connected vehicle gateway. IC Role / Device Role / Timing Role: Always-on power stage with ultra-low IQ; PGOOD monitors rail integrity during OTA updates and firmware validation. Use Value: 25μA no-load current reduces parasitic drain to <10µA system-level - meets OEM 20µA parking current limits for 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QWRNRQ1 | 3.5–36V input, 8A output, 2.1MHz, but larger 16-pin WQFN; no spread-spectrum; higher IQ (26μA) | Targeted at higher-current clusters (e.g., digital instrument panels); lacks integrated BST capacitor management for ultra-low dropout | Select LM61480QWRNRQ1 only if >1A output or dual-rail capability required; MAX16904RATB50/V+T remains optimal for space-constrained 600mA nodes. |
| TPS62933QDBVRQ1 | 3–18V input, 3A output, 2.25MHz, 15μA IQ, but no >42V transient rating or AEC-Q100 Grade 1 temp range | Designed for lower-voltage domains (e.g., ADAS domain controllers); unsuitable for direct battery connection in 24V trucks or cold-crank scenarios | Choose TPS62933QDBVRQ1 for 12V-only systems needing lowest IQ; MAX16904RATB50/V+T is mandatory where +42V surge immunity or −40°C to +125°C operation is specified. |
Compared with LM61480QWRNRQ1 and TPS62933QDBVRQ1, the MAX16904RATB50/V+T uniquely combines automotive-grade transient robustness (+42V), ultra-low IQ in SKIP mode (25μA), and 97% dropout capability in a 3mm × 3mm footprint - making it irreplaceable for cost- and size-sensitive 5V/600mA automotive subsystems.
Availability
MAX16904RATB50/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for MAX16904RATB50/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 automotive, industrial, and communications markets.
The MAX16904 product line delivers high-voltage-input, AEC-Q100-qualified buck converters targeting automotive subsystems requiring reliable 5V/3.3V rails under harsh electrical and thermal conditions.
FAQ
What is the exact output voltage and tolerance of the MAX16904RATB50/V+T?
The MAX16904RATB50/V+T delivers a factory-trimmed fixed output voltage of 5.0V with ±2.5% accuracy in forced fixed-frequency mode and ±4.0% in SKIP mode, measured across −40°C to +125°C ambient and 0–600mA load. This tolerance is guaranteed by design and verified during production test for automotive qualification.
Does the MAX16904RATB50/V+T support synchronization to an external clock?
Yes, the MAX16904RATB50/V+T supports external clock synchronization via its SYNC pin, accepting input frequencies from 1.8MHz to 2.6MHz. When SYNC is driven by an external clock or tied to BIAS, the device operates in forced fixed-frequency mode - essential for EMI reduction in multi-rail systems like infotainment head units.
What package type and thermal performance does the MAX16904RATB50/V+T use?
The MAX16904RATB50/V+T uses a 10-pin TDFN-EP package (3mm × 3mm × 0.75mm) with exposed pad soldered to PGND. Its thermal resistance is θJA = 41°C/W on a four-layer board, enabling 1.95W continuous power dissipation at +70°C ambient - sufficient for 600mA at 5V with typical efficiency.
How does the MAX16904RATB50/V+T handle automotive cold-crank conditions?
The MAX16904RATB50/V+T maintains regulation during cold-crank (down to ~4.5V battery) by operating in dropout mode at 97% duty cycle, achieved through periodic low-side FET activation every 6.5μs to recharge the BST capacitor - ensuring uninterrupted 5.0V output to critical ECUs without external circuitry.
Is spread-spectrum modulation enabled on the MAX16904RATB50/V+T?
No, the MAX16904RATB50/V+T does not include spread-spectrum modulation; that feature is only present on MAX16904SATBxx/V+ variants (e.g., MAX16904SATB50/V+). The "R" prefix in MAX16904RATB50/V+T denotes the non-spread-spectrum version, confirmed by the Selector Guide and top-mark "AVY".
MAX16904RATB50/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)
MAX16904RATB50/V+T FAQ
1.How can I place an order for MAX16904RATB50/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904RATB50/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 MAX16904RATB50/V+T reliable?
The price and inventory of MAX16904RATB50/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 MAX16904RATB50/V+T is usually 5 days.
3.What payment methods are accepted for MAX16904RATB50/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904RATB50/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904RATB50/V+T?
MAX16904RATB50/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904RATB50/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 MAX16904RATB50/V+T?
For technical support, including MAX16904RATB50/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904RATB50/V+T requirements.
6.How does Aetrix verify that MAX16904RATB50/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16904RATB50/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 MAX16904RATB50/V+T meets industry standards.
7.What is the process for return or replacement of MAX16904RATB50/V+T?
All MAX16904RATB50/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904RATB50/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 MAX16904RATB50/V+T part is unused and in its original packaging.
Return procedure for MAX16904RATB50/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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