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Analog Devices Inc./Maxim Integrated MAX16993ATJC+
- Part No.:
- MAX16993ATJC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJC+.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,834
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Product details
Overview
MAX16993ATJC+ from Maxim Integrated is an AEC-Q100 qualified automotive PMIC integrating one high-voltage synchronous step-down controller (OUT1) and two cascaded low-voltage synchronous step-down converters (OUT2/OUT3), operating at 2.1MHz with 30µA quiescent current, 3.5V–36V input range, and -40°C to +125°C operation - designed for infotainment head units and ADAS domain controllers requiring compact, efficient multi-rail power.
For engineers reviewing the MAX16993ATJC+ datasheet, MAX16993ATJC+ pinout, MAX16993ATJC+ application, or MAX16993ATJC+ equivalent, key selection considerations include its 32-pin TQFN-EP package, individual enable/reset per channel, spread-spectrum and SYNC capability, and factory-trimmed or resistor-adjustable output voltages across all three rails.
Technical Context
The MAX16993ATJC+ implements a current-mode architecture with forced-PWM and skip modes, enabling stable regulation under dynamic load transients while minimizing EMI via programmable spread-spectrum (SSEN) and external clock synchronization (SYNC). Its OUT1 controller supports up to 42V load-dump protection and pin-selectable 2.1MHz or factory-set lower frequencies (1.05MHz/525kHz/420kHz/350kHz).
OUT2 and OUT3 operate from OUT1's output, delivering up to 3A each with 180° out-of-phase switching, integrated FETs (RDS(ON) < 110mΩ high-side, < 90mΩ low-side), and independent soft-start (4ms for OUT1, 2.5ms for OUT2/OUT3), enabling precise power sequencing in multi-processor automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V continuous; withstands 42V load-dump transients - enables direct connection to automotive battery without external protection circuitry. |
| Switching Frequency | 2.1MHz (CSEL1 = GND); factory options: 1.05MHz/525kHz/420kHz/350kHz - allows AM-band avoidance and smaller passive component sizing. |
| Quiescent Current | 30µA with OUT1 enabled - meets automotive "always-on" low-power requirements for wake-up circuits and CAN nodes. |
| Output Current Capability | OUT1: controller-only (external FETs); OUT2/OUT3: up to 3A each with integrated FETs - eliminates need for discrete power stages in secondary rails. |
| Output Voltage Range | OUT1: 3.0V–5.5V (fixed or resistor-adjustable); OUT2/OUT3: 0.8V–3.95V - supports core logic, I/O, and memory rails in SoC-based modules. |
| Thermal Rating | AEC-Q100 Grade 0 (–40°C to +125°C ambient); junction limit +150°C, shutdown at +170°C - validated for under-hood and dashboard mounting environments. |
| Protection Features | Overtemperature shutdown, overcurrent limiting (100–150mV CS threshold), individual RESET_ outputs with 0.1–7.8ms timeout - enables autonomous fault recovery without host intervention. |
Pinout & Package
MAX16993ATJC+ uses a 32-pin TQFN-EP (5mm × 5mm × 0.75mm) with side-wettable QFND-EP variant, featuring exposed thermal pad (EP = GND) and separate PGND2/PGND3 pins for optimal noise isolation between output channels.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | Main high-voltage supply input | Accepts 3.5V–36V battery input; includes undervoltage lockout (4.5V startup threshold) and 42V transient tolerance. |
| EN1 / EN2 / EN3 | Independent enable inputs | Active-high digital control per rail; EN1 gating enables full system power sequencing - disabling EN1 shuts down all three regulators. |
| OUT1 / OUT2 / OUT3 | Output voltage sense inputs | Connect directly to respective output nodes for feedback; support fixed (FB1 tied to BIAS/GND) or adjustable (resistor divider) configurations. |
| RESET1 / RESET2 / RESET3 | Open-drain reset outputs | Assert low when output drops >6% below nominal; timeout programmable (0.1–7.8ms) - provides reliable power-good signaling to microcontrollers. |
| SSEN / SYNC / CSEL1 | Control configuration inputs | SSEN enables spread-spectrum; SYNC accepts 1.7–2.4MHz external clock or configures PWM/skip mode; CSEL1 selects 2.1MHz or factory-divided frequency. |
| LX1 / LX2 / LX3 | Switching node terminals | High-frequency switching points for external inductors; require tight layout and low-inductance paths to minimize EMI and voltage spikes. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output architecture with cascaded topology | OUT2/OUT3 powered from OUT1 improves overall efficiency by eliminating redundant conversion stages - reduces total solution losses by ~8% vs. independent supplies. |
| Individual soft-start timing | 4ms for OUT1, 2.5ms for OUT2/OUT3 - ensures controlled power-up sequence preventing inrush current conflicts in multi-rail SoC systems. |
| Spread-spectrum and SYNC I/O | Reduces peak radiated emissions by >10dB at fundamental switching frequency - simplifies EMC compliance testing for automotive CE-marked modules. |
| Factory-trimmed output accuracy | ±3% over line/load/temperature without precision resistors - lowers BOM cost and design risk for fixed-voltage applications like DDR memory termination or camera sensor bias rails. |
| Robust automotive qualification | AEC-Q100 Grade 0, -40°C to +125°C operation, 150°C thermal warning, 170°C shutdown - meets ISO 16750-2 pulse test and long-term reliability requirements for passenger vehicle ECUs. |
Applications
| Infotainment Head Unit Power | ADAS Domain Controller |
|---|---|
|
Use Scenario: Powering SoC, display interface, audio codec, and USB PHY in centralized automotive infotainment systems. IC Role / Device Role / Timing Role: Primary PMIC providing three regulated rails: 5.0V for USB/PHY, 3.15V for display I/O, and 1.2V for DDR memory termination. Use Value: Cascaded architecture reduces heat generation and board area versus discrete DC-DC solutions; 2.1MHz operation avoids AM radio band interference. |
Use Scenario: Supplying vision processor, radar preprocessor, and CAN FD transceiver in zonal ECU architectures. IC Role / Device Role / Timing Role: Centralized power manager delivering sequenced 3.3V (vision core), 1.8V (memory), and 5.0V (transceiver) with independent reset monitoring. Use Value: Individual RESET_ outputs enable per-rail fault detection and graceful shutdown; AEC-Q100 qualification ensures functional safety compliance. |
| Telematics Control Unit (TCU) | Digital Instrument Cluster |
|
Use Scenario: Supporting LTE modem, GNSS receiver, and eSIM interface in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: High-efficiency triple converter supplying 3.3V (modem core), 1.8V (GNSS RF), and 5.0V (USB-C PD negotiation) with ultra-low quiescent current. Use Value: 30µA IQ enables always-on GPS tracking during vehicle sleep mode without draining battery beyond ISO 19453 limits. |
Use Scenario: Powering TFT LCD driver, graphics GPU, and touch controller in high-resolution digital dashboards. IC Role / Device Role / Timing Role: Sequenced multi-rail source with 4ms/2.5ms soft-start ensuring glitch-free display initialization and backlight ramp-up. Use Value: Spread-spectrum modulation suppresses switching noise coupling into sensitive analog video signals and capacitive touch sensing lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel automotive DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20096ATPA/V+ | Single 3.5V–36V buck controller with dual 3A synchronous buck outputs; same 2.1MHz base frequency but no spread-spectrum; requires external compensation on all loops. | Lacks SSEN and has less flexible frequency programming - suitable where EMI margin is sufficient and layout space allows external compensation components. | Select MAX20096ATPA/V+ only if spread-spectrum is unnecessary and design team prefers full loop control over integrated compensation. |
| TPS650361QRHBRQ1 | Triple-output automotive PMIC with 2.2MHz switching, but OUT1 is 2.5A controller (not high-voltage), and OUT2/OUT3 are 1.5A only; no load-dump protection above 36V. | Lower voltage rating and reduced current capability limit use to body-control modules - not recommended for front-end ADAS or infotainment with high-current processors. | Choose TPS650361QRHBRQ1 only for non-battery-direct applications (e.g., post-regulated 5V input) where 1.5A per secondary rail suffices. |
Compared with MAX20096ATPA/V+ and TPS650361QRHBRQ1, the MAX16993ATJC+ uniquely combines 42V load-dump tolerance, integrated spread-spectrum, and factory-trimmed ±3% accuracy - making it the only option qualified for direct-battery, high-reliability infotainment and ADAS power domains.
Availability
MAX16993ATJC+ is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS domain controllers, and telematics control units requiring stable component supply, long lifecycle support, and AEC-Q100-compliant power management.
Supply support for MAX16993ATJC+ 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-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, with emphasis on power efficiency, integration, and reliability.
The MAX16993ATJC+ belongs to Maxim's automotive-grade PMIC family, engineered specifically for compact, high-efficiency multi-rail power delivery in battery-connected electronic control units - addressing stringent quiescent current, thermal, and EMC requirements of modern vehicles.
FAQ
What is the maximum input voltage the MAX16993ATJC+ can withstand during automotive load-dump events?
The MAX16993ATJC+ is protected against load-dump transients up to 42V, exceeding the ISO 7637-2 Pulse 5a requirement. This allows direct connection to the vehicle battery without external TVS diodes in most passenger car applications. The device maintains regulation during 42V/100ms pulses and automatically recovers once voltage returns within normal operating range.
Does the MAX16993ATJC+ support independent power sequencing between its three output rails?
Yes, the MAX16993ATJC+ supports precise sequencing via separate EN1, EN2, and EN3 inputs and distinct soft-start timers: 4ms for OUT1 and 2.5ms for both OUT2 and OUT3. Enabling EN1 first initiates OUT1 ramp-up; only after OUT1 reaches regulation can EN2/EN3 be asserted to start secondary rails - enabling robust boot-up in SoC-based systems.
Can the MAX16993ATJC+ operate with an external clock source, and what are the acceptable frequency and duty-cycle ranges?
Yes, the MAX16993ATJC+ accepts an external clock via the SYNC pin. Valid input frequencies are 1.7MHz to 2.4MHz with a 50% ±5% duty cycle. When driven by an external clock, the internal oscillator synchronizes to it, eliminating beat frequencies and reducing system-level EMI - critical for radar and camera subsystems sharing the same PCB.
How does the spread-spectrum function (SSEN) affect electromagnetic emissions of the MAX16993ATJC+?
When SSEN is pulled high (to BIAS), the MAX16993ATJC+ modulates its switching frequency between fSW and fSW + 6% at 4kHz, spreading energy across a wider bandwidth. This reduces peak radiated emissions by ≥10dB at the fundamental frequency - easing compliance with CISPR 25 Class 5 limits without adding ferrite beads or shielding.
What are the output voltage options available for the MAX16993ATJC+, and how are they configured?
The MAX16993ATJC+ supports fixed and adjustable outputs: OUT1 offers factory-trimmed 3.3V (FB1 = GND) or 5.0V (FB1 = BIAS), or resistor-divider adjustable 3.0V–5.5V (FB1 = 1.0V); OUT2/OUT3 support 0.8V–3.95V via external dividers or factory options including 3.15V and 1.8V. Configuration is done at PCB level using FBx connections and resistor values - no OTP programming required.
MAX16993ATJC+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Programmable)
- Number of Outputs:
- 3
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.95V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX16993ATJC+ FAQ
1.How can I place an order for MAX16993ATJC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJC+ 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 MAX16993ATJC+ reliable?
The price and inventory of MAX16993ATJC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16993ATJC+ is usually 5 days.
3.What payment methods are accepted for MAX16993ATJC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJC+?
MAX16993ATJC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJC+ 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 MAX16993ATJC+?
For technical support, including MAX16993ATJC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJC+ requirements.
6.How does Aetrix verify that MAX16993ATJC+ is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJC+ 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 MAX16993ATJC+ meets industry standards.
7.What is the process for return or replacement of MAX16993ATJC+?
All MAX16993ATJC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJC+, 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 MAX16993ATJC+ part is unused and in its original packaging.
Return procedure for MAX16993ATJC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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