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Analog Devices Inc./Maxim Integrated MAX16904SAUE50+T
- Part No.:
- MAX16904SAUE50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16904SAUE50+T.pdf
- Description:
- IC REG BUCK 5V 600MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,570
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Product details
Overview
The MAX16904SAUE50+T from Maxim Integrated is a synchronous buck DC-DC converter IC with integrated high-side and low-side MOSFETs, delivering up to 600mA output current from a +3.5V to +28V input. It operates at 2.1MHz fixed frequency (with SKIP and sync modes), features 25μA no-load quiescent current, PGOOD monitoring, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX16904SAUE50+T datasheet, MAX16904SAUE50+T pinout, MAX16904SAUE50+T application, or MAX16904SAUE50+T equivalent, this page provides verified package mapping (16-pin TSSOP-EP), confirmed thermal performance (θJA = 38.3°C/W), validated spread-spectrum EMI reduction (+6%), and real-world design constraints including 80ns minimum on-time and 97% dropout duty cycle.
Technical Context
The MAX16904SAUE50+T implements current-mode control with internal slope compensation and requires no external loop compensation. Its 2.1MHz switching frequency enables compact 3.3µH–4.7µH inductors and sub-10µF ceramic output capacitors while avoiding AM-band interference.
It supports three operational modes via the SYNC pin: forced PWM (for stable EMI), SKIP mode (25μA IQ at light load), and external synchronization (1.8–2.6MHz). Spread-spectrum modulation-enabled in this variant-shifts frequency +6% around 2.1MHz to reduce peak radiated emissions without affecting SYNC pin functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +3.5V to +28V; tolerates +42V transients for cold-crank immunity in automotive systems |
| Output Voltage | Fixed 5.0V ±2.5% (fixed-frequency mode); ±4.0% in SKIP mode over -40°C to +125°C |
| Max Output Current | 600mA continuous; peak current limit 1.05A typ ensures short-circuit robustness |
| Switching Frequency | 2.1MHz typ (1.925–2.275MHz); supports external sync (1.8–2.6MHz) and spread-spectrum (+6%) |
| Quiescent Current | 25μA typ in SKIP mode at no load; drops to 1μA in shutdown (EN = low) |
| Thermal Range | -40°C to +125°C ambient; thermal shutdown at +175°C with 15°C hysteresis |
| Package | 16-pin TSSOP-EP (5mm × 4.4mm); exposed pad thermally connected to PGND |
Pinout & Package
MAX16904SAUE50+T is housed in a thermally enhanced 16-pin TSSOP-EP package (outline 21-0108) with an exposed pad soldered to PGND for improved thermal dissipation (θJC = 3°C/W). The package supports automotive-grade reflow profiles and RoHS compliance (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 16) | Bootstrap capacitor node | Drives high-side MOSFET gate; requires 0.1µF ceramic capacitor between BST and LX |
| SUP (Pins 2,3) | Main power input | Accepts +3.5V to +28V; connect both pins together and decouple with 4.7µF ceramic near SUP |
| LX (Pins 4,5) | Switching node | Connects to inductor; both pins must be tied together; high dv/dt node requiring tight layout |
| PGND (Pins 6,7,11) | Power ground return | Low-impedance path for high-current switch return; tie all PGND pins and expose pad to same plane |
| OUTS (Pin 8) | Voltage feedback sense | Monitors regulated output; bypass to PGND with ≥10µF X7R ceramic capacitor |
| PGOOD (Pin 12) | Open-drain status signal | Pulls low when VOUT < 91% nominal; requires external 20kΩ pull-up to BIAS or system rail |
| SYNC (Pin 13) | Mode control and sync input | GND/unconnected → SKIP mode; BIAS or clock → forced PWM; enables EMI optimization |
| BIAS (Pin 14) | Internal LDO output | +5V logic supply; bypass with 2.2µF ceramic to GND; powers internal circuitry and PGOOD pull-up |
| GND (Pin 15) | Analog reference ground | Separate from PGND; connect only at single point near OUTS capacitor return |
| EN (Pin 1) | Enable control | High-voltage compatible (up to +42V); drive >2.4V to enable; no internal pull-up saves quiescent current |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | +6% frequency dithering reduces peak radiated EMI without compromising regulation or SYNC compatibility |
| 97% dropout duty cycle | Enables operation down to VIN ≈ VOUT; critical for automotive start-stop and cold-crank scenarios |
| Ultra-low 25μA quiescent current | Extends battery life in always-on vehicle modules (e.g., telematics, ADAS sensors) during sleep states |
| AEC-Q100 Grade-1 qualification | Validated for -40°C to +125°C operation with full automotive reliability testing (HTOL, TC, UHAST) |
| Integrated high- and low-side FETs | Eliminates external MOSFETs and drivers; RDS(ON) = 400mΩ (HS) / 250mΩ (LS) at VBIAS = 5V |
Applications
| Automotive Infotainment Power Rail | Industrial Sensor Node DC-DC |
|---|---|
Use Scenario: Powers audio DSP, display controller, and USB interface in head-unit systems with wide battery voltage swing (-0.5V to +42V). IC Role / Device Role / Timing Role: Primary 5V buck regulator with PGOOD sequencing and cold-crank support. Use Value: Maintains 5.0V ±2.5% under 12V battery dips to 6V; 25μA IQ extends standby time for wake-on-radio functions. |
Use Scenario: Supplies 5V to low-power industrial IoT nodes operating from 24V DC bus with transient surges. IC Role / Device Role / Timing Role: High-input-voltage step-down converter with EMI-controlled switching for EMC-compliant designs. Use Value: Spread-spectrum mode meets CISPR-25 Class 5 radiated emissions limits without added shielding or filters. |
| ADAS Camera Module Supply | Rail-to-Rail Automotive MCU Core Supply |
Use Scenario: Powers image sensor and ISP in rear-view or surround-view cameras exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Compact 5V regulator with thermal shutdown and PGOOD fault reporting for ASIL-B subsystems. Use Value: Operates continuously at +125°C ambient; thermal shutdown at +175°C prevents latch-up during overheating events. |
Use Scenario: Generates clean 5V core rail for automotive microcontrollers (e.g., S32K, RH850) requiring precise voltage tolerance. IC Role / Device Role / Timing Role: Precision buck converter with ±2.5% output accuracy across load, line, and temperature. Use Value: Load regulation ≤ ±0.5% at 600mA; line regulation ≤ ±0.3% from 6V–18V input ensures MCU stability during alternator ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRTWRQ1 | 4.5V–36V input; 8A output; 2.1MHz; no spread-spectrum; larger 16-pin WQFN (3mm × 4.5mm) | Higher current, wider VIN, but lacks integrated spread-spectrum EMI reduction | Select when >600mA load or >28V input required; verify PCB area and thermal design for higher power |
| TPS62933QDBVRQ1 | 3V–18V input; 3A output; 2.25MHz; 15μA IQ; no AEC-Q100 Grade-1 rating | Lower IQ and higher frequency, but limited to 18V max input and non-automotive temp range | Select for cost-sensitive industrial applications below 18V; not suitable for 24V/42V automotive systems |
Compared with LM61480QRTWRQ1 and TPS62933QDBVRQ1, the MAX16904SAUE50+T uniquely combines AEC-Q100 Grade-1 qualification, +42V transient tolerance, spread-spectrum EMI control, and 25μA SKIP-mode IQ in a compact 16-pin TSSOP - making it optimal for space-constrained, emission-sensitive 5V automotive rails.
Availability
MAX16904SAUE50+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial sensor nodes requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for MAX16904SAUE50+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 medical systems.
The MAX16904 product line delivers high-voltage, low-quiescent-current buck converters optimized for automotive power rails where cold-crank resilience, EMI compliance, and AEC-Q100 reliability are mandatory.
FAQ
What is the exact output voltage and tolerance of the MAX16904SAUE50+T?
The MAX16904SAUE50+T delivers a factory-trimmed fixed 5.0V output. Its voltage accuracy is ±2.5% over full load (0–600mA), line (6V–18V input), and temperature (-40°C to +125°C) in forced fixed-frequency mode. In SKIP mode, tolerance widens to ±4.0% due to pulse-skipping dynamics, as specified in the Electrical Characteristics table on page 3 of the datasheet.
Does the MAX16904SAUE50+T support external synchronization, and what is its valid frequency range?
Yes, the MAX16904SAUE50+T supports external synchronization via the SYNC pin. When driven by an external clock source, it locks to frequencies between 1.8MHz and 2.6MHz. This capability allows system-level EMI alignment and noise spreading across multiple synchronized converters in complex automotive ECUs.
How does the spread-spectrum feature work in the MAX16904SAUE50+T, and is it active during external sync?
The MAX16904SAUE50+T's spread-spectrum modulation shifts its internal oscillator frequency +6% above the nominal 2.1MHz - exclusively when operating in internally generated mode. It is disabled during external synchronization; the device follows the applied clock precisely without dithering, preserving timing integrity in sync-dependent systems.
What is the recommended input and output capacitor configuration for the MAX16904SAUE50+T?
Per the Applications Information section, use a 4.7µF X7R ceramic capacitor from SUP to PGND, placed adjacent to pins 2 and 3. For output, a minimum 10µF X7R ceramic capacitor (rated ≥10V) is required from OUTS to PGND. Additional low-ESR tantalum or polymer caps may be added for improved transient response in high-dI/dt applications like camera modules.
Is the MAX16904SAUE50+T pin-compatible with other variants in the MAX16904 family?
Yes - all MAX16904 variants in the 16-pin TSSOP-EP package (e.g., MAX16904RAUE50/V+, MAX16904SAUE33/V+) share identical pinout, footprint, and land pattern (90-0120). The MAX16904SAUE50+T differs only in spread-spectrum enablement and output voltage trim; no PCB redesign is needed when substituting within the same package type.
MAX16904SAUE50+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):
- 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+T FAQ
1.How can I place an order for MAX16904SAUE50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904SAUE50+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 MAX16904SAUE50+T reliable?
The price and inventory of MAX16904SAUE50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904SAUE50+T is usually 5 days.
3.What payment methods are accepted for MAX16904SAUE50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904SAUE50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904SAUE50+T?
MAX16904SAUE50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904SAUE50+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 MAX16904SAUE50+T?
For technical support, including MAX16904SAUE50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904SAUE50+T requirements.
6.How does Aetrix verify that MAX16904SAUE50+T is sourced from the original manufacturer or authorized distributors?
All MAX16904SAUE50+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 MAX16904SAUE50+T meets industry standards.
7.What is the process for return or replacement of MAX16904SAUE50+T?
All MAX16904SAUE50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904SAUE50+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 MAX16904SAUE50+T part is unused and in its original packaging.
Return procedure for MAX16904SAUE50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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