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Analog Devices Inc./Maxim Integrated MAX16993ATJF+
- Part No.:
- MAX16993ATJF+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJF+.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,367
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Product details
Overview
MAX16993ATJF+ from Maxim Integrated is an AEC-Q100 qualified automotive power-management IC (PMIC) integrating one high-voltage synchronous step-down controller (OUT1) and two cascaded low-voltage synchronous step-down converters (OUT2/OUT3). It operates from 3.5V–36V input, delivers up to 3A per low-voltage output, achieves 30µA quiescent current in no-load mode, and supports 2.1MHz switching frequency - enabling compact, high-efficiency power rails for ADAS camera modules and infotainment head units.
For engineers reviewing the MAX16993ATJF+ datasheet, MAX16993ATJF+ pinout, MAX16993ATJF+ application, or MAX16993ATJF+ equivalent, key selection considerations include its triple-output architecture with individual enable/reset signals, spread-spectrum EMI reduction, SYNC input for system-level clock alignment, and side-wettable QFND-EP package for automated optical inspection in automotive production.
Technical Context
The MAX16993ATJF+ implements a current-mode control architecture with forced-PWM and skip modes across all three channels. Its OUT1 controller uses external high-side/low-side MOSFETs and supports load-dump transient protection up to 42V, while OUT2 and OUT3 integrate power FETs and operate from OUT1's regulated output - improving overall efficiency and reducing external component count.
Frequency configuration is pin-selectable via CSEL1 (GND = 2.1MHz; BIAS = factory-divided options: 1.05MHz/525kHz/420kHz/350kHz), and spread-spectrum modulation (enabled via SSEN) varies oscillator frequency by ±3% at 4kHz rate to suppress narrowband EMI peaks without affecting regulation performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V–36V continuous; withstands 42V load-dump transients - enables direct connection to automotive battery without pre-regulator. |
| Switching Frequency | 2.1MHz (pin-selectable); eliminates AM-band interference and allows use of sub-2.2µH inductors for space-constrained layouts. |
| Quiescent Current | 30µA with OUT1 enabled - meets automotive "always-on" low-power requirements for telematics and body control modules. |
| Output Current Capability | OUT2/OUT3: up to 3A each; OUT1: controller-only (external FETs) - supports multi-rail SoC power domains including core, I/O, and memory supplies. |
| Output Voltage Accuracy | ±2.5% for OUT1 (PWM mode); ±3.0% for OUT2/OUT3 - ensures stable operation of sensitive image sensors and microcontrollers over -40°C to +125°C. |
| Thermal Protection | Thermal shutdown at +170°C with 15°C hysteresis; thermal warning at +150°C - provides fail-safe operation in under-hood environments. |
| AEC-Q100 Grade | Grade-0 qualified (-40°C to +125°C junction) - certified for safety-critical automotive applications including front-camera and radar ECUs. |
Pinout & Package
The MAX16993ATJF+ is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed pad for enhanced thermal dissipation and solder-joint inspection capability in automotive SMT lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | Main HV input supply | Accepts 3.5V–36V battery input; includes UVLO startup threshold at 4.5V and 42V transient tolerance. |
| EN1 / EN2 / EN3 | Independent enable inputs | Active-high digital controls allow sequenced power-up of OUT1 → OUT2 → OUT3 with fixed soft-start delays (4ms / 2.5ms). |
| RESET1 / RESET2 / RESET3 | Open-drain reset outputs | Assert low when respective output drops >6% below nominal; timeout programmable from 0.1ms to 7.4ms for system monitoring. |
| CSEL1 | Buck 1 clock select | GND = 2.1MHz; BIAS = factory-programmed divide-by-2/4/5/6 - enables EMI optimization without changing layout. |
| SSEN | Spread-spectrum enable | BIAS = ±3% frequency dither at 4kHz; GND = fixed-frequency operation - reduces peak radiated emissions by up to 10dB. |
| SYNC | Frequency synchronization I/O | Configurable as input: logic-high forces PWM mode; external clock (1.7–2.4MHz) aligns switching edges across multiple PMICs. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output architecture | One HV controller + two integrated-FET buck converters cascaded from OUT1 - reduces bill-of-materials and improves cross-regulator efficiency vs. discrete solutions. |
| Side-wettable QFND-EP package | 5mm × 5mm footprint with solderable side walls - enables automated optical inspection (AOI) of solder joints for zero-defect automotive manufacturing compliance. |
| Individual reset outputs with programmable timeout | Three independent open-drain RESET_ pins with selectable delay (0.1ms–7.4ms) - simplifies power sequencing validation and fault logging in ASIL-B systems. |
| Spread-spectrum + SYNC dual EMI control | Hardware-selectable spread-spectrum (SSEN) and external clock synchronization (SYNC) - provides two orthogonal methods to meet CISPR-25 Class 5 radiated emissions limits. |
| Factory-trimmed output voltages | Fixed OUT1 options: 3.3V or 5.0V; adjustable range: 3.0V–5.5V (FB1 = 1.0V); OUT2/OUT3: 0.8V–3.95V - eliminates need for precision resistors in production designs. |
Applications
| ADAS Camera Module Power | Automotive Infotainment Head Unit |
|---|---|
Use Scenario: Dual-sensor front-facing camera system requiring isolated 3.3V image sensor rail and 1.2V ISP core supply with strict EMI limits. IC Role / Device Role / Timing Role: MAX16993ATJF+ generates synchronized 3.3V (OUT1), 3.15V (OUT2), and 1.2V (OUT3) rails with 180° phase shift between OUT2/OUT3 to reduce input capacitance ripple. Use Value: 2.1MHz operation avoids AM band; spread-spectrum reduces peak EMI by >8dB; individual RESET_ signals enable per-rail health monitoring in ISO 26262-compliant firmware. | Use Scenario: 10.25-inch LCD display head unit with ARM-based application processor, DDR memory, and audio codec - all requiring tightly regulated, sequenced power. IC Role / Device Role / Timing Role: MAX16993ATJF+ delivers 5.0V (OUT1), 3.3V (OUT2), and 1.8V (OUT3) with independent EN_/RESET_ control to implement precise power-up/down timing per JEDEC JESD84-B51 spec. Use Value: 30µA quiescent current extends battery runtime in accessory mode; AEC-Q100 Grade-0 rating ensures reliability at under-dash temperatures up to +105°C ambient. |
| Body Control Module (BCM) | Radar ECU Power Supply |
Use Scenario: Centralized vehicle body controller managing door locks, lighting, and HVAC - requiring always-on 3.3V MCU supply and switched 5V actuator rail. IC Role / Device Role / Timing Role: MAX16993ATJF+ powers MCU core (OUT2) and CAN transceiver (OUT3) from main 12V battery (VSUP), using EN1/EN3 for wake/sleep state control. Use Value: Undervoltage lockout (2.7V PV threshold) prevents brownout resets; individual RESET_ outputs feed watchdog timers for ASIL-A functional safety compliance. | Use Scenario: 77GHz millimeter-wave radar ECU needing ultra-low-noise 1.0V RF synthesizer supply and 1.8V DSP core rail in tight EMI-sensitive enclosure. IC Role / Device Role / Timing Role: MAX16993ATJF+ provides clean, synchronized 1.0V (OUT2) and 1.8V (OUT3) from 5V intermediate rail (OUT1), with SYNC input locked to master system clock to eliminate beat frequencies. Use Value: 180° out-of-phase switching cuts input ripple current by 50%; side-wettable QFND package ensures solder joint integrity during thermal cycling in engine bay mounting. |
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 |
|---|---|---|---|
| MPQ4333-AEC1 | Single 3.5A buck converter (no integrated controller channel); 2.2MHz fixed frequency; no spread-spectrum or SYNC input. | Lacks triple-output architecture and cascaded topology - requires external pre-regulator for HV input and separate LDOs for auxiliary rails. | Select when only one high-current rail is needed and board space permits discrete HV pre-regulation. |
| TPS650332A-Q1 | Triple-output PMIC with two 2A bucks + one LDO; 2.2MHz max frequency; no HV controller - requires ≥5.5V input for all channels. | Cannot accept direct 12V battery input; limited to intermediate-rail applications; no load-dump protection. | Prefer for post-DCDC systems where 5V/3.3V rails are already established and EMI constraints are less stringent. |
Compared with MPQ4333-AEC1 and TPS650332A-Q1, the MAX16993ATJF+ uniquely integrates a 36V-tolerant HV controller with two high-current synchronous bucks in one package - eliminating external pre-regulators, reducing solution size by ≥35%, and providing native support for automotive battery-direct architectures with full AEC-Q100 Grade-0 qualification.
Availability
MAX16993ATJF+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX16993ATJF+ 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 - emphasizing robustness, integration, and AEC-Q100 compliance.
The MAX16993ATJF+ belongs to Maxim's automotive-grade PMIC portfolio, engineered specifically for battery-direct power conversion in safety-critical electronic control units where small footprint, low quiescent current, and EMI resilience are mandatory design requirements.
FAQ
What is the maximum input voltage the MAX16993ATJF+ can withstand during automotive load-dump events?
The MAX16993ATJF+ is rated to withstand load-dump transients up to 42V on the VSUP pin for durations ≤50ns under normal operating conditions and loads up to maximum rated output current. This specification meets ISO 7637-2 Pulse 5a requirements for 12V automotive systems and ensures reliable operation without external TVS clamping in most front-end configurations. The device's internal protection circuitry activates automatically during such events without latch-up or damage.
Does the MAX16993ATJF+ support independent power sequencing between its three output channels?
Yes, the MAX16993ATJF+ supports fully independent power sequencing via dedicated EN1, EN2, and EN3 inputs. EN1 enables the high-voltage controller (OUT1); once OUT1 completes its 4ms soft-start, EN2 and EN3 can be asserted to ramp up OUT2 and OUT3 with their own 2.5ms soft-start periods. Each channel also features individual open-drain RESET_ outputs that assert low if output voltage deviates >6% from nominal - enabling precise timing control and fault detection in ASIL-B compliant systems.
Can the MAX16993ATJF+ operate with a 2.1MHz switching frequency while synchronized to an external clock source?
Yes, the MAX16993ATJF+ can operate at 2.1MHz while synchronized to an external clock via the SYNC pin. When configured as an input, the SYNC pin accepts external clock signals between 1.7MHz and 2.4MHz with 50% duty cycle. Applying a 2.1MHz external clock forces all three channels into fixed-frequency forced-PWM mode, eliminating skip-mode noise and ensuring deterministic timing for time-sensitive applications like radar or camera frame synchronization. The internal oscillator is disabled during external sync.
What package type does the MAX16993ATJF+ use, and why is it suitable for automotive manufacturing?
The MAX16993ATJF+ uses a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad. Its side-wettable leads enable automated optical inspection (AOI) of solder fillets during reflow - a critical requirement for zero-defect automotive production. The package's low thermal resistance (θJA = 37°C/W) and robust construction support operation from -40°C to +125°C junction temperature, meeting AEC-Q100 Grade-0 standards for under-hood and dashboard-mounted ECUs.
How does the spread-spectrum feature of the MAX16993ATJF+ reduce electromagnetic interference?
The MAX16993ATJF+ spread-spectrum feature modulates the internal oscillator frequency by ±3% (i.e., fSW to fSW + 6%) at a 4kHz sawtooth rate when SSEN is pulled high to BIAS. This dithering spreads radiated energy across a wider bandwidth, reducing peak emissions by up to 10dB compared to fixed-frequency operation - helping designs meet CISPR-25 Class 5 limits without adding ferrite beads or shielding. The function is hardware-controlled and introduces no regulation error or output ripple increase.
MAX16993ATJF+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Obsolete
- 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 (3.3V, 5V)
- 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)
MAX16993ATJF+ FAQ
1.How can I place an order for MAX16993ATJF+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJF+ 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 MAX16993ATJF+ reliable?
The price and inventory of MAX16993ATJF+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16993ATJF+ is usually 5 days.
3.What payment methods are accepted for MAX16993ATJF+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJF+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJF+?
MAX16993ATJF+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJF+ 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 MAX16993ATJF+?
For technical support, including MAX16993ATJF+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJF+ requirements.
6.How does Aetrix verify that MAX16993ATJF+ is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJF+ 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 MAX16993ATJF+ meets industry standards.
7.What is the process for return or replacement of MAX16993ATJF+?
All MAX16993ATJF+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJF+, 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 MAX16993ATJF+ part is unused and in its original packaging.
Return procedure for MAX16993ATJF+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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