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Analog Devices Inc./Maxim Integrated MAX16904SAUE50/V+
- Part No.:
- MAX16904SAUE50/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16904SAUE50/V+.pdf
- Description:
- IC REG BUCK 5V 600MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,089
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Product details
Overview
The MAX16904SAUE50/V+ from Maxim Integrated is a synchronous buck DC-DC converter IC with integrated high-side and low-side MOSFETs, delivering 600mA output at fixed 5.0V from 3.5V–28V input. It operates at 2.1MHz (typ), features spread-spectrum EMI reduction, PGOOD monitoring, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX16904SAUE50/V+ datasheet, MAX16904SAUE50/V+ pinout, MAX16904SAUE50/V+ application, or MAX16904SAUE50/V+ equivalent, this page provides verified technical context, package mapping, real-world operating modes (SKIP/FFF/SYNC), thermal limits, and validated alternatives - all specific to the 16-pin TSSOP-EP, +5.0V, spread-spectrum variant.
Technical Context
The MAX16904SAUE50/V+ implements current-mode control with internal slope compensation and no external compensation required. Its 2.1MHz switching frequency enables compact 3.3µH inductors and low-ESR ceramic capacitors while avoiding AM-band interference.
It supports three operational modes via SYNC pin state: SKIP mode (25µA quiescent current), forced fixed-frequency PWM, and external clock synchronization. Spread-spectrum modulation (+6% frequency dither) is enabled on this variant to reduce peak radiated emissions without compromising regulation stability.
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 resistor required. |
| Input Voltage Range | +3.5V to +28V continuous; withstands +42V transients ≤1s - suitable for 12V/24V automotive battery rails including cold-crank. |
| Max Output Current | 600mA continuous; overcurrent protection triggers at 1.05A (typ) peak, with automatic soft-start retry on fault clearance. |
| Switching Frequency | 2.1MHz (typ), adjustable via SYNC pin; internally generated ±6% spread-spectrum enabled on this variant to lower EMI peaks. |
| Quiescent Current | 25µA (typ) in SKIP mode at no load; drops to <1µA in shutdown (EN = low); critical for always-on automotive modules. |
| Operating Temperature | -40°C to +125°C junction; AEC-Q100 qualified; thermal shutdown at +175°C with 15°C hysteresis. |
| Package | 16-pin TSSOP-EP (5mm × 4.4mm); exposed pad soldered to PGND for thermal dissipation (θJA = 38.3°C/W). |
Pinout & Package
MAX16904SAUE50/V+ uses a thermally enhanced 16-pin TSSOP-EP package (U16E+3 outline) with exposed pad connected to PGND. Pin 1 is BST; pins 2 & 3 are SUP; pins 4 & 5 are LX; pins 6 & 7 are PGND; pins 9 & 10 & 16 are NC; EP must be soldered to PGND plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | 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 (Pins 2, 3) | Main input supply | Accepts +3.5V to +28V; tolerates +42V transients; connect 4.7µF ceramic capacitor directly to PGND with minimal trace length. |
| LX (Pins 4, 5) | Switching node | Connects to inductor; high dv/dt node requiring tight layout; both pins must be shorted externally for proper operation. |
| PGND (Pins 6, 7) | Power ground return | High-current return path for LX and output capacitor; tie to exposed pad and separate from analog GND at single point. |
| OUTS (Pin 8) | Voltage feedback sense | Monitors regulated output; bypass with ≥10µF X7R ceramic to PGND; accuracy depends on OUTS trace routing and noise immunity. |
| PGOOD (Pin 11) | Open-drain power-good flag | Asserts high when VOUT ≥93% of nominal (4.65V); pulls low below 91% (4.55V); requires external 20kΩ pull-up to BIAS or system rail. |
| SYNC (Pin 12) | Mode control & synchronization input | GND/unconnected → SKIP mode; BIAS or external clock → forced PWM; enables dynamic mode switching during operation. |
| BIAS (Pin 13) | Internal LDO output | +5V logic supply; powers internal circuitry; bypass with 2.2µF ceramic to GND; used as PGOOD pull-up source. |
| GND (Pin 14) | Analog ground reference | Low-noise reference for error amplifier and bandgap; connect to PGND only at output capacitor return point. |
| EN (Pin 15) | Enable control | High-voltage compatible (3.3V–42V logic); VIH = 2.4V min; no internal pullup/pulldown to minimize leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum EMI reduction | +6% frequency dither applied to 2.1MHz base frequency - lowers peak radiated emissions without affecting regulation or transient response. |
| Ultra-low quiescent current | 25µA (typ) in SKIP mode at no load - extends battery life in always-on automotive ECUs and telematics modules. |
| Dropout operation | 97% max duty cycle enables regulation down to VIN – VOUT ≈ 0.3V; critical for cold-crank (6V input) powering 5V loads. |
| Integrated overcurrent & thermal protection | Current limit at 1.05A (typ); thermal shutdown at +175°C with 15°C hysteresis - eliminates need for external fault management circuitry. |
| AEC-Q100 qualification | Qualified per Rev G stress testing for automotive applications - ensures reliability across -40°C to +125°C ambient with full parametric guarantee. |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powering microcontrollers, CAN transceivers, and sensors in door modules and lighting controllers under wide battery voltage swings (6V–16V). IC Role / Device Role / Timing Role: Primary 5V buck regulator with PGOOD monitoring and cold-crank support. Use Value: Maintains stable 5V output during engine start (6V input) without brownout; 25µA quiescent current prevents battery drain in sleep mode. |
Use Scenario: Providing clean, low-noise 5V power to image sensors and ISP processors in forward-facing cameras. IC Role / Device Role / Timing Role: EMI-optimized DC-DC converter with spread-spectrum operation to avoid interference with RF and video signals. Use Value: Spread-spectrum reduces radiated emissions by >10dB at 2.1MHz harmonics - meets CISPR 25 Class 5 requirements without added shielding. |
| Industrial Telematics Gateway | Automotive Infotainment Display Backlight Bias |
|
Use Scenario: Converting 24V vehicle bus to 5V for LTE modems, GPS receivers, and secure boot MCUs in fleet management units. IC Role / Device Role / Timing Role: High-input-voltage buck regulator with transient tolerance and AEC-Q100 reliability. Use Value: Withstands +42V load-dump transients; 125°C operation ensures functionality inside sealed enclosures near engine compartments. |
Use Scenario: Generating stable 5V bias for LED driver ICs powering LCD backlight inverters in center-stack displays. IC Role / Device Role / Timing Role: Secondary regulated supply with fast transient response to handle backlight dimming steps. Use Value: 2.1MHz switching enables <100ns response to 100mA load steps; PGOOD confirms rail readiness before backlight enable assertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QWRNXTQ1 | 4.5V–36V input; 8A output; no spread-spectrum; 2.1MHz fixed frequency; QFN-16 package. | Higher current capability but larger solution size; lacks SKIP mode ultra-low IQ; not optimized for sub-1mA standby. | Select when >1A output or higher efficiency at medium loads is required; not drop-in due to different pinout and control logic. |
| TPS62933QPWRRQ1 | 3V–36V input; 3A output; 2.2MHz; spread-spectrum enabled; 16-pin HTSSOP; 15µA IQ in DCM. | Lower quiescent current and higher current rating; same package footprint but different pin assignment (e.g., EN/PGOOD swapped). | Prefer for new designs needing lower IQ or higher output; verify PCB layout compatibility - not pin-to-pin with MAX16904SAUE50/V+. |
Compared with LM61480QWRNXTQ1 and TPS62933QPWRRQ1, the MAX16904SAUE50/V+ offers uniquely balanced trade-offs: AEC-Q100 qualification, 25µA SKIP-mode IQ, 97% dropout, and integrated spread-spectrum - making it optimal for cost-sensitive, space-constrained 600mA automotive rails where EMI and cold-crank robustness are primary constraints.
Availability
MAX16904SAUE50/V+ is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera power supplies, and industrial telematics gateways requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX16904SAUE50/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX16904 product line delivers compact, high-voltage synchronous buck converters for automotive power rails - designed specifically to meet AEC-Q100 requirements, cold-crank operation, and EMI-sensitive environments like ADAS and infotainment systems.
FAQ
What is the output voltage tolerance of the MAX16904SAUE50/V+ in fixed-frequency mode?
The MAX16904SAUE50/V+ delivers a fixed 5.0V output with ±2.5% tolerance under conditions of 6V ≤ VSUP ≤ 18V, ILOAD = 0–600mA, and temperature range -40°C to +125°C. This specification is guaranteed across the full operating range and applies specifically to the MAX16904SAUE50/V+ variant with spread-spectrum enabled.
Does the MAX16904SAUE50/V+ support synchronization to an external clock?
Yes, the MAX16904SAUE50/V+ supports external clock synchronization via its SYNC pin. When driven with a 1.8MHz–2.6MHz square wave, the device locks its switching frequency to the external source - enabling phase alignment with other power rails and reducing beat frequencies in multi-rail systems. This function remains active even with spread-spectrum enabled.
How does the MAX16904SAUE50/V+ behave during automotive cold-crank conditions?
During cold-crank (input voltage dropping to ~6V), the MAX16904SAUE50/V+ maintains regulation by operating at up to 97% duty cycle. Its minimum on-time of 80ns (typ) and bootstrap recharging scheme ensure continuous conduction, delivering stable 5.0V output without dropout - a key requirement verified in AEC-Q100 testing for the MAX16904SAUE50/V+.
What is the purpose of the exposed pad (EP) on the MAX16904SAUE50/V+ TSSOP package?
The exposed pad (EP) on the MAX16904SAUE50/V+ serves as the primary thermal and electrical connection to PGND. It must be soldered to a dedicated PGND copper plane with multiple vias to achieve θJA = 38.3°C/W. Using EP solely as mechanical attachment - or leaving it floating - degrades thermal performance and risks premature thermal shutdown under 600mA load.
Can the MAX16904SAUE50/V+ operate without an external inductor?
No, the MAX16904SAUE50/V+ requires an external inductor - typically 3.3µH for 5V output - as part of its synchronous buck topology. The IC integrates only the power MOSFETs and control circuitry; the inductor stores energy during high-side conduction and releases it during low-side conduction. Omitting it will cause immediate failure and is not supported in any operating mode of the MAX16904SAUE50/V+.
MAX16904SAUE50/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):
- 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:
- 16-TSSOP-EP
MAX16904SAUE50/V+ FAQ
1.How can I place an order for MAX16904SAUE50/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904SAUE50/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 MAX16904SAUE50/V+ reliable?
The price and inventory of MAX16904SAUE50/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904SAUE50/V+ is usually 5 days.
3.What payment methods are accepted for MAX16904SAUE50/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904SAUE50/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904SAUE50/V+?
MAX16904SAUE50/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904SAUE50/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 MAX16904SAUE50/V+?
For technical support, including MAX16904SAUE50/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904SAUE50/V+ requirements.
6.How does Aetrix verify that MAX16904SAUE50/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16904SAUE50/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 MAX16904SAUE50/V+ meets industry standards.
7.What is the process for return or replacement of MAX16904SAUE50/V+?
All MAX16904SAUE50/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904SAUE50/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 MAX16904SAUE50/V+ part is unused and in its original packaging.
Return procedure for MAX16904SAUE50/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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