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Analog Devices Inc./Maxim Integrated MAX16904SAUE33/V+T
- Part No.:
- MAX16904SAUE33/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16904SAUE33/V+T.pdf
- Description:
- IC REG BUCK 3.3V 600MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,146
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Product details
Overview
The MAX16904SAUE33/V+T 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 in engine control units and ADAS camera modules.
For engineers reviewing the MAX16904SAUE33/V+T datasheet, MAX16904SAUE33/V+T pinout, MAX16904SAUE33/V+T application, or MAX16904SAUE33/V+T equivalent, key selection criteria include AEC-Q100 qualification, spread-spectrum EMI reduction, dropout operation up to 97% duty cycle, and compatibility with 16-pin TSSOP-EP thermal package for high-temperature under-hood environments.
Technical Context
This current-mode buck regulator integrates high-side and low-side DMOS switches (RDS(ON) = 400–800mΩ / 250–450mΩ), operates across -40°C to +125°C, and features programmable SYNC input enabling SKIP mode (25μA IQ), forced PWM, or external clock synchronization. Its 80ns minimum on-time and internal soft-start (8ms ramp) support cold-crank transient resilience.
Power-good monitoring (PGOOD threshold: 88–98% of VOUT, 10μs debounce), overcurrent protection (1.05A typ), and thermal shutdown (+175°C with 15°C hysteresis) ensure robustness in automotive 12V/24V systems. Spread-spectrum modulation (±6% around 2.1MHz) is enabled for this variant, suppressing radiated EMI without compromising AM-band immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.5% (fixed-frequency mode), ±4.0% (SKIP mode) - ensures stable logic rail for microcontrollers and image sensors |
| Input Voltage Range | +3.5V to +28V, tolerates +42V transients - supports wide automotive battery range including load-dump conditions |
| Switching Frequency | 2.1MHz (typ), ±6% spread-spectrum enabled - enables compact 3.3μH inductor and avoids AM band (1.8–2.6MHz sync range) |
| Quiescent Current | 25μA (typ) in SKIP mode at no load - extends battery life in always-on vehicle subsystems |
| Output Current | 600mA continuous, 1.05A peak current limit - powers multiple CAN transceivers or camera ISP cores |
| Operating Temperature | -40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood deployment |
| Package | 16-pin TSSOP-EP (5mm × 4.4mm), exposed pad soldered to PGND - achieves θJA = 38.3°C/W for reliable thermal dissipation |
Pinout & Package
MAX16904SAUE33/V+T uses a thermally enhanced 16-pin TSSOP-EP package (U16E+3 outline) with exposed pad connected to PGND. Pin functions are validated per Maxim's official pin description table and match the SAUE variant ordering code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 16) | Bootstrap supply for high-side gate driver | Requires 0.1µF ceramic capacitor to LX; enables efficient high-side FET conduction during 97% dropout duty cycle |
| SUP (Pins 2,3) | Main input voltage supply | Accepts +3.5V to +28V; dual pins must be shorted externally; requires 4.7µF ceramic cap placed adjacent to pins |
| LX (Pins 4,5) | Switching node between HS/LS FETs | High-impedance when off; dual pins must be shorted; connects to 3.3µH inductor and BST capacitor |
| PGND (Pins 6,7,11) | Power ground return path | Low-impedance return for high di/dt currents; must connect to exposed pad and output capacitor negative terminal |
| OUTS (Pin 8) | Voltage feedback sense input | Monitors regulated 3.3V output via resistor divider; bypassed with ≥10µF X7R ceramic to PGND |
| PGOOD (Pin 12) | Open-drain power-good status | Pulls low if VOUT < 91% nominal; requires external 20kΩ pull-up; used for system power sequencing |
| SYNC (Pin 13) | Mode control and clock synchronization | GND/unconnected → SKIP mode; BIAS or external clock → forced PWM; enables dynamic efficiency optimization |
| BIAS (Pin 14) | Internal 5V logic supply | Provides bias for control circuitry; requires 2.2µF ceramic cap to GND; powers EN and PGOOD drivers |
| GND (Pin 15) | Analog reference ground | Separate from PGND; connects to BIAS capacitor ground and signal return paths only |
| EN (Pin 1) | Enable input with HV tolerance | Active-high; accepts +3.3V logic or +42V automotive signals; no internal pullup/pulldown to minimize leakage |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum EMI reduction | ±6% frequency modulation around 2.1MHz - lowers peak radiated emissions without affecting regulation stability |
| Dropout operation | 97% maximum duty cycle - sustains 3.3V output during cold-crank events down to ~4.5V input |
| Ultra-low standby IQ | 25μA at no load in SKIP mode - meets automotive ISO 16750-2 quiescent current requirements |
| Integrated current-limit protection | 1.05A typical peak current threshold - prevents damage during short-circuit or overload on 3.3V rail |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C operation - certified for automotive power management in safety-critical ECUs |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in head-unit systems with variable battery voltage. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying core logic and I/O rails. Use Value: Maintains regulation during 6V cold-crank dips and load-dump transients up to +42V without external TVS. | Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Fixed 3.3V source with fast transient response (<40µs recovery) for pixel data integrity. Use Value: 2.1MHz switching enables small 3.3µH inductor and low-output-ripple performance critical for analog video paths. |
| Engine Control Unit (ECU) | Telematics Control Unit (TCU) |
Use Scenario: Provides clean 3.3V for microcontroller, CAN transceivers, and sensor interfaces in harsh under-hood environments. IC Role / Device Role / Timing Role: High-reliability DC-DC stage with thermal shutdown and PGOOD sequencing. Use Value: AEC-Q100 qualification and -40°C to +125°C operation ensure functional safety compliance in ASIL-B systems. | Use Scenario: Powers LTE modem, GNSS receiver, and secure element in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum-enabled 3.3V supply minimizing RF interference with cellular antennas. Use Value: ±6% frequency dither reduces narrowband EMI peaks that could desensitize LTE receive chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMQ61460QRJRQ1 | 4.2V–60V input, 6A output, 2.1MHz, no spread-spectrum, QFN-12 package | Higher current capacity; lacks integrated spread-spectrum EMI reduction | Choose when >600mA load or wider VIN needed; requires external EMI filtering |
| TPS62933RTER | 3V–18V input, 3A output, 1.8MHz–4MHz adjustable, spread-spectrum enabled, 3mm × 2mm QFN-11 | Narrower input range; smaller footprint; higher max output current | Prefer for space-constrained designs with ≤18V input; verify cold-crank margin at 3.5V start |
Compared with LM61460QRJRQ1 and TPS62933RTER, the MAX16904SAUE33/V+T uniquely combines AEC-Q100 Grade 1 rating, +42V transient tolerance, and factory-trimmed 3.3V output in a thermally optimized TSSOP-EP package-making it optimal for cost-sensitive, high-temperature automotive subsystems requiring minimal external components.
Availability
MAX16904SAUE33/V+T is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and engine control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX16904SAUE33/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, low-quiescent-current buck converters optimized for automotive power rails-specifically targeting cold-crank resilience, EMI compliance, and AEC-Q100 reliability in safety-critical electronic control units.
FAQ
What is the exact output voltage tolerance of the MAX16904SAUE33/V+T in fixed-frequency mode?
The MAX16904SAUE33/V+T delivers a fixed 3.3V output with ±2.5% tolerance in forced fixed-frequency mode across -40°C to +125°C ambient, 6V ≤ VSUP ≤ 18V, and 0–600mA load. This specification is guaranteed by design and verified in production test for the SAUE33/V+T variant per Maxim's Electrical Characteristics table.
Does the MAX16904SAUE33/V+T support synchronization to an external clock source?
Yes, the MAX16904SAUE33/V+T supports external clock synchronization via its SYNC pin (Pin 13). When driven with a 1.8–2.6MHz clock signal, the device locks to the external frequency and operates in forced PWM mode-enabling deterministic EMI behavior and multi-rail phase alignment in complex automotive power systems.
What thermal performance can be expected from the MAX16904SAUE33/V+T in a standard 4-layer PCB layout?
In a JEDEC-standard 4-layer board per JESD51-7, the MAX16904SAUE33/V+T in its 16-pin TSSOP-EP package achieves θJA = 38.3°C/W and θJC = 3°C/W. With proper exposed-pad soldering to PGND and adequate copper area, it sustains 600mA continuous output at +125°C ambient without thermal shutdown.
How does the MAX16904SAUE33/V+T behave during automotive cold-crank conditions?
During cold-crank (e.g., 4.5V input), the MAX16904SAUE33/V+T maintains 3.3V regulation by operating at up to 97% duty cycle, supported by periodic BST capacitor recharge pulses. Its UVLO hysteresis (0.4V) and 8ms soft-start prevent false triggering, while PGOOD remains asserted above 91% of nominal output.
Is spread-spectrum modulation enabled on the MAX16904SAUE33/V+T, and how does it affect EMI?
Yes, spread-spectrum modulation is enabled on the MAX16904SAUE33/V+T (denoted by "S" in SAUE prefix). It modulates the 2.1MHz switching frequency by +6% only-shifting energy away from narrowband peaks while guaranteeing no drop into the AM band (≥1.8MHz), reducing peak radiated emissions by up to 10dBµV/m in conducted tests.
MAX16904SAUE33/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) 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):
- 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+T FAQ
1.How can I place an order for MAX16904SAUE33/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904SAUE33/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 MAX16904SAUE33/V+T reliable?
The price and inventory of MAX16904SAUE33/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 MAX16904SAUE33/V+T is usually 5 days.
3.What payment methods are accepted for MAX16904SAUE33/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904SAUE33/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904SAUE33/V+T?
MAX16904SAUE33/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904SAUE33/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 MAX16904SAUE33/V+T?
For technical support, including MAX16904SAUE33/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904SAUE33/V+T requirements.
6.How does Aetrix verify that MAX16904SAUE33/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16904SAUE33/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 MAX16904SAUE33/V+T meets industry standards.
7.What is the process for return or replacement of MAX16904SAUE33/V+T?
All MAX16904SAUE33/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904SAUE33/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 MAX16904SAUE33/V+T part is unused and in its original packaging.
Return procedure for MAX16904SAUE33/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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