My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16904SATB33/V+T
- Part No.:
- MAX16904SATB33/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX16904SATB33/V+T.pdf
- Description:
- IC REG BUCK 3.3V 600MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,125
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX16904SATB33/V+T from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output at fixed 3.3V with integrated high-side and low-side MOSFETs, 2.1MHz switching frequency, 25μA no-load quiescent current, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX16904SATB33/V+T datasheet, MAX16904SATB33/V+T pinout, MAX16904SATB33/V+T application, or MAX16904SATB33/V+T equivalent, this page provides verified package mapping (10-pin TDFN-EP), confirmed spread-spectrum EMI reduction, validated dropout operation at 97% duty cycle, and real-world thermal shutdown behavior at +175°C.
Technical Context
The MAX16904SATB33/V+T uses current-mode control with internal slope compensation and requires no external loop compensation. Its 80ns minimum on-time enables stable regulation down to 3.3V output even with 18V input, while the 97% max duty cycle supports cold-crank operation in automotive systems.
It implements three distinct operating modes via the SYNC pin: SKIP mode (25μA IQ), forced fixed-frequency PWM (2.1MHz ±6.5%), and external synchronization (1.8–2.6MHz). Spread-spectrum modulation-enabled in this variant-is applied only during internally generated clock operation and shifts frequency +6% to reduce peak EMI without entering the AM band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.5% (fixed-frequency mode), ±4.0% (SKIP mode) - ensures compatibility with 3.3V logic rails across temperature and load. |
| Input Voltage Range | +3.5V to +28V continuous, +42V transient tolerance - supports 12V/24V automotive battery systems including load dump and cold-crank events. |
| Switching Frequency | 2.1MHz typical (1.925–2.275MHz) - enables use of compact 3.3µH inductors and reduces output ripple without AM-band interference. |
| Quiescent Current | 25μA typical in SKIP mode at no load - extends battery life in always-on vehicle modules such as telematics and body controllers. |
| Thermal Protection | Shuts down at +175°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Output Current | 600mA guaranteed minimum with overcurrent protection at 1.05A peak - sustains full-rated load under worst-case voltage and temperature conditions. |
| Package | 10-pin TDFN-EP (3mm × 3mm × 0.75mm) with exposed pad - delivers θJA = 41°C/W on 4-layer board for reliable thermal performance in space-constrained automotive ECUs. |
Pinout & Package
MAX16904SATB33/V+T is housed in a thermally enhanced 10-pin TDFN-EP package (outline 21-0137, land pattern 90-0003) with exposed pad soldered to PGND for optimal heat dissipation and EMI control.
| 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 +42V; must be decoupled with 4.7µF ceramic capacitor placed adjacent to pin for high-frequency noise suppression. |
| LX | Switching node | Connects to inductor; carries high di/dt current; layout must minimize loop area to reduce EMI and voltage spikes. |
| PGND | Power ground return | Carries high pulsed currents; must be tied directly to exposed pad and kept separate from analog GND until single-point connection at OUTS capacitor. |
| OUTS | Voltage feedback sense | Monitors regulated output; bypassed with ≥10µF X7R ceramic capacitor to PGND for stability and transient response. |
| PGOOD | Open-drain power-good signal | Asserts high when VOUT ≥93% of nominal; pulls low at ≤91%; requires external 20kΩ pullup for system sequencing. |
| SYNC | Mode control and sync input | Ground or float → SKIP mode; driven to BIAS or external clock → forced PWM; enables dynamic efficiency optimization. |
| BIAS | Internal 5V LDO output | Supplies internal logic; bypassed with 2.2µF ceramic capacitor to GND; can power PGOOD pullup resistor. |
| GND | Analog ground reference | Low-noise reference for error amplifier and oscillator; connected to PGND only at OUTS capacitor return point. |
| EN | Enable input | High-voltage compatible (3.3V–42V logic); rising edge activates converter; no internal pullup/pulldown minimizes standby leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | +6% frequency dithering reduces radiated EMI peaks without compromising AM-band immunity or requiring external filtering. |
| Dropout operation | Maintains regulation at 97% duty cycle with periodic BST recharge (every 6.5μs), enabling stable 3.3V output during automotive cold-crank down to 4.5V input. |
| Ultra-low IQ SKIP mode | 25μA no-load supply current extends battery runtime in always-on applications like CAN gateway modules and ADAS sensors. |
| Integrated power switches | 400mΩ high-side and 250mΩ low-side RDS(ON) MOSFETs eliminate external FETs and gate drivers, reducing BOM count and layout complexity. |
| AEC-Q100 qualification | Rated for -40°C to +125°C ambient operation with full electrical validation - meets automotive reliability requirements for engine bay and chassis-mounted ECUs. |
Applications
| Automotive Body Control Module (BCM) | Automotive Infotainment Power Rail |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and LED drivers in door module with 12V battery input subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator providing clean, sequenced, and monitored power with PGOOD assertion for safe MCU boot. Use Value: 25μA quiescent current prevents battery drain during vehicle sleep mode; 42V transient tolerance avoids reset during alternator load dump. |
Use Scenario: Supplies 3.3V to audio DSP, touchscreen controller, and USB PHY in head unit with strict EMI limits for FM reception. IC Role / Device Role / Timing Role: High-frequency synchronous buck converter with spread-spectrum modulation to suppress conducted and radiated emissions near AM/FM bands. Use Value: 2.1MHz switching and +6% SSFM reduce peak EMI by >10dB, eliminating need for ferrite beads or shielding cans in cost-sensitive infotainment designs. |
| Industrial Vehicle Telematics Unit | Railway Onboard Control System |
Use Scenario: Powers GPS receiver, cellular modem, and secure element in fleet management device mounted in cab with wide input voltage variation. IC Role / Device Role / Timing Role: Input-tolerant 3.3V regulator with undervoltage lockout (2.8–3.2V hysteresis) and thermal shutdown for unregulated 24V rail operation. Use Value: 3.5–28V input range accommodates aging batteries and generator fluctuations; -40°C to +125°C rating ensures reliability in non-climate-controlled environments. |
Use Scenario: Delivers 3.3V to safety-critical I/O controller and Ethernet PHY in train signaling interface with EN50155 compliance requirements. IC Role / Device Role / Timing Role: AEC-Q100 qualified DC-DC converter used as secondary regulator downstream of isolated 24V/48V input stage. Use Value: Exposed-pad TDFN package achieves 41°C/W thermal resistance on standard 4-layer PCB, meeting EN50155 thermal derating curves without heatsinks. |
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 | 3.3V fixed output, 1.5MHz switching, 1.2A rated, no spread-spectrum, QFN-16 package | Higher current capability but larger footprint and higher IQ (35μA); lacks SSFM for stringent EMI environments | Select when >600mA load margin or lower-cost qualification path is required; verify layout space for 4mm × 4mm QFN. |
| TPS62903-Q1 | 3.3V fixed output, 2.25MHz switching, 1A rated, spread-spectrum enabled, 12-pin WQFN package | Higher switching frequency allows smaller inductors; tighter output accuracy (±1%) but higher cost and different pinout | Choose for next-gen designs needing improved light-load efficiency and tighter regulation; revalidate PCB layout and thermal design. |
Compared with LM61480QRTWRQ1 and TPS62903-Q1, the MAX16904SATB33/V+T offers the smallest footprint (3mm × 3mm), lowest no-load IQ (25μA), and automotive-validated 97% dropout operation - making it optimal for space- and battery-constrained legacy automotive modules where EMI must be minimized without adding filters.
Availability
MAX16904SATB33/V+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial telematics, and railway control systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX16904SATB33/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 high-reliability analog and mixed-signal ICs for automotive, industrial, and communications markets with emphasis on power efficiency and robustness.
The MAX16904 product line delivers compact, high-voltage synchronous buck converters optimized for automotive subsystems requiring ultra-low quiescent current, wide input range, and AEC-Q100 qualification.
FAQ
What is the exact output voltage tolerance of the MAX16904SATB33/V+T under full load and temperature?
The MAX16904SATB33/V+T delivers 3.3V output with ±2.5% tolerance in forced fixed-frequency mode and ±4.0% in SKIP mode, tested across -40°C to +125°C ambient and 0–600mA load. These values are production-guaranteed per the Electrical Characteristics table on page 3 of the datasheet, not design-only estimates.
Does the MAX16904SATB33/V+T require external compensation components?
No, the MAX16904SATB33/V+T uses internal current-mode control with built-in slope compensation and does not require external compensation networks. Its loop is factory-tuned for stability with standard 3.3µH inductors and 10µF ceramic output capacitors, as confirmed in the Applications Information section (page 10).
How does the spread-spectrum feature work in the MAX16904SATB33/V+T, and is it always active?
The spread-spectrum modulation in the MAX16904SATB33/V+T shifts the 2.1MHz switching frequency by +6% only during internally generated clock operation - it is disabled when SYNC is driven by an external clock. This selective activation ensures EMI reduction without interfering with synchronized multi-rail systems, as documented on page 10 of the datasheet.
Can the MAX16904SATB33/V+T operate during automotive cold-crank conditions?
Yes, the MAX16904SATB33/V+T maintains regulation during cold-crank (down to ~4.5V input) by operating at 97% duty cycle with periodic BST capacitor recharge every 6.5μs. This behavior is explicitly verified in the Detailed Description (page 9) and supported by the 3.5V minimum input rating and 42V transient tolerance.
What is the thermal resistance and maximum power dissipation of the MAX16904SATB33/V+T in its TDFN package?
The MAX16904SATB33/V+T in 10-pin TDFN-EP has θJA = 41°C/W and θJC = 9°C/W on a 4-layer board. At +70°C ambient, its continuous power dissipation is 1951mW, derating by 24.4mW/°C above that temperature - values confirmed in the Absolute Maximum Ratings table (page 2) and Package Information section (page 3).
MAX16904SATB33/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):
- 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:
- 10-TDFN (3x3)
MAX16904SATB33/V+T FAQ
1.How can I place an order for MAX16904SATB33/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904SATB33/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 MAX16904SATB33/V+T reliable?
The price and inventory of MAX16904SATB33/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 MAX16904SATB33/V+T is usually 5 days.
3.What payment methods are accepted for MAX16904SATB33/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904SATB33/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904SATB33/V+T?
MAX16904SATB33/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904SATB33/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 MAX16904SATB33/V+T?
For technical support, including MAX16904SATB33/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904SATB33/V+T requirements.
6.How does Aetrix verify that MAX16904SATB33/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16904SATB33/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 MAX16904SATB33/V+T meets industry standards.
7.What is the process for return or replacement of MAX16904SATB33/V+T?
All MAX16904SATB33/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904SATB33/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 MAX16904SATB33/V+T part is unused and in its original packaging.
Return procedure for MAX16904SATB33/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16904SATB33/V+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
