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Analog Devices Inc./Maxim Integrated MAX16904RAUE50/V+
- Part No.:
- MAX16904RAUE50/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16904RAUE50/V+.pdf
- Description:
- IC REG BUCK 5V 600MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,323
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Product details
Overview
The MAX16904RAUE50/V+ 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 MAX16904RAUE50/V+ datasheet, MAX16904RAUE50/V+ pinout, MAX16904RAUE50/V+ application, or MAX16904RAUE50/V+ equivalent, this page provides verified package mapping (16-pin TSSOP-EP), confirmed thermal shutdown (175°C), PGOOD monitoring capability, dropout operation at 97% duty cycle, and spread-spectrum disable status - all critical for automotive ECU and ADAS power design validation.
Technical Context
This current-mode buck regulator integrates high-side and low-side DMOS switches (RON,HS = 400–800mΩ, RON,LS = 250–450mΩ) and requires no external compensation. Its 80ns minimum on-time enables stable regulation down to 1.8V output while supporting input transients up to +42V.
Three SYNC-configurable modes-SKIP (25μA IQ), forced fixed-frequency (2.1MHz ±6.25%), and external synchronization (1.8–2.6MHz)-allow dynamic trade-offs between light-load efficiency and EMI control. The device enters dropout by pulsing the high-side FET every 6.5μs to sustain >97% effective duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +3.5V to +28V; tolerates +42V transients for cold-crank immunity in 12V/24V 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 protection without external sensing |
| Switching Frequency | 2.1MHz typ; guarantees no AM-band interference and enables ≤4.7μH inductors and compact ceramic capacitors |
| Quiescent Current | 25μA typ in SKIP mode at no load; reduces battery drain during vehicle sleep modes |
| Thermal Protection | 175°C junction shutdown with 15°C hysteresis; prevents thermal runaway under sustained overload |
| PGOOD Threshold | Active-high open-drain output asserting when VOUT ≥93% of nominal (4.65V) and deasserting at ≤91% (4.55V) |
Pinout & Package
MAX16904RAUE50/V+ uses a thermally enhanced 16-pin TSSOP-EP package (5mm × 4.4mm, exposed pad soldered to PGND). Pin count and layout match the U16E+3 outline (JEDEC MO-153 variant) with dual SUP, LX, and PGND pins internally bonded for low-impedance power routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | SUP | High-voltage input supply (−0.3V to +42V); dual pins must be shorted externally for proper current sharing and thermal distribution |
| 3, 4, 5 | LX | Switching node connecting to external inductor; dual pins reduce trace inductance and improve EMI performance |
| 6, 7 | PGND | Power ground return for high-current paths; dual pins minimize voltage drop across PCB traces during 600mA switching |
| 8 | OUTS | Voltage feedback sense input; connects to output capacitor divider to enable accurate 5.0V regulation |
| 11 | PGOOD | Open-drain power-good signal; requires external 20kΩ pullup to BIAS or system rail for system-level power sequencing |
| 12 | SYNC | Mode selection input: GND/unconnected → SKIP mode; BIAS/high → forced PWM; external clock → synchronized operation |
| 13 | BIAS | +5V internal LDO output; powers internal logic and supplies bias for EN/PGOOD pullups; bypass with 2.2μF ceramic |
| 14 | GND | Analog ground reference; isolated from PGND except at single-point connection near output capacitor |
| 15 | EN | Enable input compatible with +3.3V logic or +42V battery; no internal pullup/pulldown to preserve ultra-low IQ |
| 16 | BST | Bootstrap capacitor terminal (0.1μF); charges high-side gate driver during each switching cycle |
| 9, 10, 16 | N.C. | No internal connection; must remain unconnected per datasheet to avoid latch-up or parametric shift |
| EP | Exposed Pad | Thermal and electrical connection to PGND; mandatory for thermal dissipation (θJA = 38.3°C/W) and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C ambient) with full production test coverage and failure analysis traceability |
| Dropout operation | Maintains regulation at >97% duty cycle via periodic BST recharge pulses, enabling operation during deep cold-crank events (e.g., VSUP = 4.5V @ 5VOUT) |
| EMI mitigation | No spread-spectrum modulation enabled (as indicated by "R" prefix); fixed 2.1MHz operation simplifies filter design while avoiding AM band (0.53–1.71MHz) |
| Robust enable interface | EN accepts +3.3V logic or direct +42V battery connection without level-shifting, supporting CAN-inhibit or key-switch control |
| Integrated protection | Combines overcurrent (1.05A peak limit), thermal shutdown (175°C), and undervoltage lockout (3.0V typ) with automatic soft-start retry on fault clearance |
Applications
| Infotainment Power Supply | ADAS Camera Module Rail |
|---|---|
Use Scenario: Powers display controllers and audio codecs in automotive head units requiring clean 5V at 400mA with cold-crank hold-up. IC Role / Device Role / Timing Role: Primary 5V buck regulator with PGOOD signaling for system power sequencing and brownout detection. Use Value: 25μA quiescent current extends battery life during vehicle sleep; 97% dropout supports operation down to 4.5V input during engine start. | Use Scenario: Supplies image sensor and ISP in forward-facing camera modules where EMI must avoid interfering with RF receivers. IC Role / Device Role / Timing Role: Fixed-frequency 2.1MHz buck converter providing regulated 5V with minimal conducted noise due to absence of spread-spectrum modulation. Use Value: Guaranteed AM-band immunity eliminates need for additional filtering; TSSOP-EP package enables compact layout near sensor PCB edge. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Generates 5V for microcontroller, CAN transceivers, and door-lock actuators in distributed body electronics. IC Role / Device Role / Timing Role: High-input-voltage buck converter tolerant of load-dump transients (+42V) and ISO 7637-2 pulse 5a compliance. Use Value: Dual SUP/LX/PGND pins reduce PCB trace impedance; exposed pad improves thermal margin under 600mA continuous load in sealed enclosures. | Use Scenario: Powers LTE modem and GNSS receiver in cellular-connected vehicle gateways requiring reliable 5V during ignition cycling. IC Role / Device Role / Timing Role: Automotive-grade DC-DC with PGOOD monitoring for firmware-controlled power-up sequence and watchdog-triggered reset. Use Value: AEC-Q100 qualification ensures long-term reliability; SYNC pin allows dynamic switching between SKIP (low IQ) and forced PWM (low noise) based on data transmission state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16904RATB50/V+ | Same 5.0V output and AEC-Q100 rating but in 10-pin TDFN-EP (3mm × 3mm); θJA = 41°C/W vs. 38.3°C/W for TSSOP | Preferred for space-constrained layouts; lower thermal resistance not required for <400mA loads | Select when board area is limited and thermal margin exceeds 20°C at 600mA |
| LM61480QRTWRQ1 | 4.5–36V input, 5V/3A output, 2.1MHz, but lacks integrated PGOOD and has higher 28μA IQ in LP mode | Supports higher current and wider VIN; requires external PGOOD circuitry for system sequencing | Choose when >600mA output or extended input range beyond +28V is needed |
Compared with MAX16904RATB50/V+, the MAX16904RAUE50/V+ offers superior thermal performance in larger packages and simplified layout with dual power pins, while LM61480QRTWRQ1 trades integrated diagnostics for higher current capacity and broader input range - making each suitable for distinct automotive subsystem priorities.
Availability
MAX16904RAUE50/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply with AEC-Q100 assurance, high-voltage transient tolerance, and ultra-low quiescent current.
Supply support for MAX16904RAUE50/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, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX16904 product line delivers compact, high-voltage synchronous buck converters optimized for automotive ECUs and sensors, emphasizing cold-crank resilience, low IQ, and AEC-Q100 compliance without external compensation.
FAQ
What is the maximum input voltage the MAX16904RAUE50/V+ can withstand without damage?
The MAX16904RAUE50/V+ has an absolute maximum input voltage rating of +42V for durations ≤1 second, enabling robust operation during automotive load-dump and cold-crank transients. This rating is validated per ISO 7637-2 and applies across the full −40°C to +125°C temperature range. Operation above +28V is permitted only transiently; sustained input above +28V may trigger UVLO or reduce efficiency but will not cause permanent damage if within the +42V limit. The device's internal protection circuits remain fully functional at these levels.
Does the MAX16904RAUE50/V+ require external compensation components?
No, the MAX16904RAUE50/V+ uses a current-mode control architecture with internal compensation, eliminating the need for external RC networks or type-II/type-III compensators. This simplifies design, reduces BOM count, and improves stability across input voltage and load variations. All loop dynamics-including soft-start ramp time (8ms typ), error amplifier bandwidth, and slope compensation-are factory-trimmed and verified across temperature. External components are limited to passive filters (BST, input/output caps, inductor) and the PGOOD pullup resistor.
How does the PGOOD function behave during startup and fault conditions for the MAX16904RAUE50/V+?
The MAX16904RAUE50/V+ asserts PGOOD high only after output voltage reaches ≥93% of 5.0V (≥4.65V) and remains stable for ≥10μs debounce time. During soft-start, PGOOD stays low until regulation is achieved. If output drops below 91% (≤4.55V) due to overload or input collapse, PGOOD pulls low within microseconds. Under short-circuit, PGOOD deasserts immediately upon current-limit activation and remains low until soft-start completes successfully post-fault. No external timing components are needed - all behavior is internal and production-tested.
Can the MAX16904RAUE50/V+ operate in dropout, and what is the minimum input voltage to maintain 5.0V output?
Yes, the MAX16904RAUE50/V+ sustains 5.0V output in dropout by dynamically adjusting to >97% duty cycle, enabling operation down to VSUP = 5.15V (5.0V ÷ 0.97) under full 600mA load. At lighter loads, it can regulate as low as 4.5V input due to reduced conduction losses. Dropout behavior is implemented via periodic 150ns low-side FET activation every 6.5μs to refresh the BST capacitor, ensuring high-side gate drive integrity. This is fully automatic and requires no external configuration.
Is spread-spectrum modulation enabled on the MAX16904RAUE50/V+?
No, spread-spectrum modulation is disabled on the MAX16904RAUE50/V+, as confirmed by the "R" prefix in the part number (per Selector Guide: "R" = spread-spectrum disabled, "S" = enabled). This yields a tightly controlled 2.1MHz ±6.25% switching frequency, simplifying EMI filter design and guaranteeing no spectral energy falls within the AM radio band (0.53–1.71MHz). For applications requiring further EMI reduction, external synchronization via the SYNC pin remains available.
MAX16904RAUE50/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:
- Bulk
- Product Status:
- Obsolete
- 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
MAX16904RAUE50/V+ FAQ
1.How can I place an order for MAX16904RAUE50/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904RAUE50/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 MAX16904RAUE50/V+ reliable?
The price and inventory of MAX16904RAUE50/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904RAUE50/V+ is usually 5 days.
3.What payment methods are accepted for MAX16904RAUE50/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904RAUE50/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904RAUE50/V+?
MAX16904RAUE50/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904RAUE50/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 MAX16904RAUE50/V+?
For technical support, including MAX16904RAUE50/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904RAUE50/V+ requirements.
6.How does Aetrix verify that MAX16904RAUE50/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16904RAUE50/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 MAX16904RAUE50/V+ meets industry standards.
7.What is the process for return or replacement of MAX16904RAUE50/V+?
All MAX16904RAUE50/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904RAUE50/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 MAX16904RAUE50/V+ part is unused and in its original packaging.
Return procedure for MAX16904RAUE50/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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