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Analog Devices Inc./Maxim Integrated MAX16904SATB50+
- Part No.:
- MAX16904SATB50+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX16904SATB50+.pdf
- Description:
- IC REG BUCK 5V 600MA 10TDFN
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Inventory:1,223
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Product details
Overview
The MAX16904SATB50+ from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output at fixed 5.0V with integrated high-side and low-side MOSFETs, operating from +3.5V to +28V input (with +42V transient tolerance), featuring 2.1MHz switching frequency, 25μA no-load quiescent current in SKIP mode, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX16904SATB50+ datasheet, MAX16904SATB50+ pinout, MAX16904SATB50+ application, or MAX16904SATB50+ equivalent, key selection considerations include its spread-spectrum EMI reduction, dropout operation at 97% duty cycle, PGOOD monitoring, thermal shutdown at +175°C, and compatibility with 3mm × 3mm TDFN-EP packaging for space-constrained automotive modules.
Technical Context
The MAX16904SATB50+ implements current-mode control with internal slope compensation and requires no external loop compensation. Its 2.1MHz fixed-frequency PWM operation-enabled via SYNC pin biasing-ensures stable regulation across load transients while avoiding AM-band interference.
When SYNC is grounded or floating, it enters ultra-low-quiescent SKIP mode (25μA typ), dynamically disabling switching cycles below ~350mA peak inductor current; when SYNC is driven by BIAS or an external clock, it operates in forced PWM mode with tight frequency control and reduced output ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +3.5V to +28V continuous; withstands +42V transients ≤1s - enables direct connection to automotive battery rails including cold-crank conditions. |
| Output Voltage | Fixed 5.0V ±2.5% (fixed-frequency mode), ±4.0% (SKIP mode) - factory-trimmed, no external feedback resistors required. |
| Max Output Current | 600mA continuous; overcurrent protection triggers at 1.05A typical - supports microcontroller, sensor, and CAN transceiver power domains. |
| Switching Frequency | 2.1MHz typical (1.925–2.275MHz range); supports spread-spectrum modulation (+6%) - allows use of sub-5mm inductors and reduces EMI peak emissions. |
| Quiescent Current | 25μA typical in SKIP mode at no load - extends battery life in always-on vehicle subsystems such as telematics and body control modules. |
| Operating Temperature | −40°C to +125°C ambient - qualified per AEC-Q100 Grade 1, suitable for under-hood and infotainment power supply applications. |
| Package | 10-pin TDFN-EP (3mm × 3mm × 0.75mm) with exposed pad - thermally enhanced for >1.0A RMS inductor current handling and PCB heat dissipation. |
Pinout & Package
MAX16904SATB50+ uses a thermally enhanced 10-pin TDFN-EP package (3mm × 3mm × 0.75mm) with exposed pad soldered to PGND for optimal thermal performance. Pin numbering follows top-view orientation with pin 1 at top-left corner.
| 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 gate drive during 97% duty-cycle dropout operation. |
| SUP | Main power input | Accepts +3.5V to +28V; must be decoupled with 4.7µF ceramic capacitor placed adjacent to pin to suppress high-frequency ripple. |
| 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 | High-current return path for LX and SUP; must be connected directly to exposed pad and output capacitor negative terminal. |
| OUTS | Voltage sense input | Monitors regulated output; bypassed with ≥10µF X7R ceramic capacitor to PGND for stability and transient response. |
| PGOOD | Open-drain status signal | Asserts high when VOUT ≥ 93% of nominal (4.65V); pulls low if <91% (4.55V); requires external 20kΩ pull-up to BIAS or system rail. |
| SYNC | Mode control input | Ground or open = SKIP mode; driven to BIAS or external clock = forced PWM; enables dynamic mode switching during operation. |
| BIAS | Internal LDO output | Provides +5V logic supply; must be bypassed with 2.2µF ceramic capacitor to GND; powers internal circuitry and can source PGOOD pull-up. |
| GND | Analog reference ground | Low-noise reference for error amplifier and bandgap; connected to PGND only at single point near OUTS capacitor to avoid noise coupling. |
| EN | Enable control | High-voltage compatible (up to +42V); active-high logic; no internal pull-up/pull-down; enables microcontroller or CAN inhibit control without level-shifting. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum frequency modulation | +6% modulation range around 2.1MHz - reduces radiated EMI peaks without compromising regulation or requiring external filtering components. |
| Dropout operation at 97% duty cycle | Maintains regulation down to VIN − VOUT ≈ 0.15V - supports wide-input automotive systems during cranking or low-battery conditions. |
| Ultra-low quiescent current in SKIP mode | 25μA typical at no load - minimizes standby power loss in always-on ECUs, enabling compliance with ISO 16750-2 quiescent current requirements. |
| Integrated high- and low-side MOSFETs | RDS(ON) = 400mΩ (HS) / 250mΩ (LS) - eliminates external FETs and gate drivers, reducing BOM count and PCB footprint by >30% vs discrete solutions. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with HTOL, TC, and ESD testing - ensures reliability in automotive power supply applications without additional qualification effort. |
Applications
| Infotainment Power Supply | ADAS Camera Module Rail |
|---|---|
Use Scenario: Powers display controllers, touch processors, and audio codecs in automotive head units with variable battery input and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying core logic and interface I/O; PGOOD signals MCU reset controller upon valid rail establishment. Use Value: Spread-spectrum operation avoids AM-band interference in FM radio reception; 2.1MHz switching enables compact 4.7µH inductor and low-profile layout. | Use Scenario: Supplies image sensor, ISP, and MIPI serializer in forward-facing camera modules where space, thermal density, and startup timing are critical. IC Role / Device Role / Timing Role: High-efficiency 5V source with fast soft-start (8ms) and precise PGOOD assertion for synchronized sensor initialization. Use Value: 25μA quiescent current extends sleep-mode battery life; 97% dropout supports operation during engine start; AEC-Q100 ensures field reliability. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Provides regulated 5V for microcontrollers, LIN transceivers, and LED drivers in door modules and lighting control units with intermittent loads. IC Role / Device Role / Timing Role: Always-on power rail with EN controlled by ignition switch or CAN wake-up; PGOOD enables safe firmware boot sequence. Use Value: SKIP mode maintains efficiency across wide load range (1mA–600mA); thermal shutdown protects against enclosure overheating in sealed modules. | Use Scenario: Powers cellular modem, GNSS receiver, and secure element in vehicle connectivity gateways requiring long-term battery-backed operation. IC Role / Device Role / Timing Role: Primary 5V supply with ultra-low standby current; EN tied to vehicle wake-line; SYNC used for EMI synchronization with other converters. Use Value: 25μA no-load draw meets ISO 16750-2 Class D requirements; spread-spectrum + 2.1MHz frequency simplifies FCC/CE certification. |
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 package | Higher current capacity; lacks integrated EMI reduction features; requires external compensation | Select when >600mA output or higher VIN tolerance (+36V) is needed; not drop-in due to different pinout and compensation requirements. |
| TPS62933QDBVRQ1 | 3V–18V input, 3A output, 2.25MHz, spread-spectrum enabled, 10-pin VSON package | Narrower input range; higher output current; same footprint but different pin assignment (e.g., EN/PGOOD swapped) | Consider for lower-VIN systems (<18V) needing higher current; verify PCB layout compatibility before substitution. |
Compared with LM61480QRTWRQ1 and TPS62933QDBVRQ1, the MAX16904SATB50+ offers optimized 600mA capability in a minimal 3mm × 3mm footprint with factory-trimmed 5V output and guaranteed AM-band immunity-making it uniquely suited for cost- and space-sensitive automotive subsystems where full 8A capacity is unnecessary.
Availability
MAX16904SATB50+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply, AEC-Q100 compliance, and production-ready EMI performance.
Supply support for MAX16904SATB50+ 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 series targets high-voltage DC-DC conversion in automotive environments, emphasizing ultra-low quiescent current, spread-spectrum EMI control, and AEC-Q100 reliability for safety-critical power rails.
FAQ
What is the output voltage accuracy of the MAX16904SATB50+ under full load and temperature range?
The MAX16904SATB50+ delivers 5.0V output with ±2.5% accuracy over −40°C to +125°C ambient, 6V–18V input, and 0–600mA load in fixed-frequency mode. In SKIP mode, accuracy is ±4.0% under the same conditions. This is achieved via factory trimming and internal bandgap reference, eliminating need for external resistor networks.
Does the MAX16904SATB50+ require external compensation components?
No, the MAX16904SATB50+ uses current-mode control with internal slope compensation and does not require external compensation components. Its stable operation is guaranteed across all specified input voltages, output loads, and temperatures with only the recommended external passive components (inductor, input/output capacitors, BST cap).
How does the spread-spectrum feature of the MAX16904SATB50+ improve EMI performance?
The MAX16904SATB50+ spreads its 2.1MHz fundamental switching frequency by +6% (i.e., 2.1MHz to 2.226MHz) in a controlled manner. This reduces peak radiated emissions by distributing energy across a narrow band, easing compliance with CISPR 25 Class 5 automotive EMI limits without adding ferrite beads or shielding.
What is the minimum on-time specification for the MAX16904SATB50+, and why does it matter?
The MAX16904SATB50+ has a typical minimum on-time of 80ns. This enables stable 5V output regulation even at high input voltages (e.g., 18V), where duty cycle would otherwise fall below controllable limits - preventing pulse-skipping instability and ensuring clean regulation without external frequency adjustment.
Can the MAX16904SATB50+ operate during automotive cold-crank conditions?
Yes, the MAX16904SATB50+ tolerates input transients up to +42V for ≤1 second and operates down to +3.5V input. Its 97% dropout capability maintains 5V output even when input drops to ~5.15V, supporting cold-crank scenarios where battery voltage falls to 3V–4V for extended periods while sustaining regulated output for critical ECUs.
MAX16904SATB50+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Product Status:
- Active
- Function:
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- Output Configuration:
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- Topology:
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- Output Type:
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- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
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- Synchronous Rectifier:
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MAX16904SATB50+ FAQ
1.How can I place an order for MAX16904SATB50+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16904SATB50+ 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 MAX16904SATB50+ reliable?
The price and inventory of MAX16904SATB50+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16904SATB50+ is usually 5 days.
3.What payment methods are accepted for MAX16904SATB50+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16904SATB50+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16904SATB50+?
MAX16904SATB50+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16904SATB50+ 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 MAX16904SATB50+?
For technical support, including MAX16904SATB50+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16904SATB50+ requirements.
6.How does Aetrix verify that MAX16904SATB50+ is sourced from the original manufacturer or authorized distributors?
All MAX16904SATB50+ 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 MAX16904SATB50+ meets industry standards.
7.What is the process for return or replacement of MAX16904SATB50+?
All MAX16904SATB50+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16904SATB50+, 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 MAX16904SATB50+ part is unused and in its original packaging.
Return procedure for MAX16904SATB50+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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