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Analog Devices Inc./Maxim Integrated MAX16993ATJC/V+
- Part No.:
- MAX16993ATJC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJC/V+.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,051
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Product details
Overview
MAX16993ATJC/V+ from Maxim Integrated is an AEC-Q100 qualified automotive PMIC integrating one high-voltage synchronous step-down controller (OUT1) and two low-voltage synchronous step-down converters (OUT2/OUT3), all operating up to 2.1MHz. It accepts 3.5V–36V input, delivers ≤5.0V/≤3.95V outputs with ±2.5% voltage accuracy, and consumes only 30µA quiescent current - enabling always-on power domains in infotainment, ADAS camera modules, and telematics ECUs.
For engineers reviewing the MAX16993ATJC/V+ datasheet, MAX16993ATJC/V+ pinout, MAX16993ATJC/V+ application, or MAX16993ATJC/V+ equivalent, key selection criteria include its 32-pin side-wettable QFND-EP package, factory-programmable switching frequency options (2.1/1.05/525/420/350kHz), individual enable/reset per channel, spread-spectrum EMI reduction, and -40°C to +125°C operation for under-hood deployment.
Technical Context
The MAX16993ATJC/V+ implements a current-mode control architecture with forced-PWM and skip modes across all three channels. Its OUT1 controller features programmable soft-start (4ms), overvoltage protection (110% threshold), and load-dump transient tolerance up to 42V - critical for direct battery connection in 12V/24V automotive systems.
OUT2 and OUT3 operate cascaded from OUT1, sharing the same 2.1MHz base frequency (not modulated by CSEL1), with 180° out-of-phase switching to reduce input ripple. Each includes integrated 3A FETs, adjustable output (0.8V–3.95V), and independent reset timeout programming (0.1–7.8ms).
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. |
| Switching Frequency | Pin-selectable 2.1MHz or factory-set 1.05/525/420/350kHz - supports AM-band avoidance and compact magnetics. |
| Quiescent Current | 30µA with OUT1 enabled - meets ISO 16750-2 standby current requirements for always-on modules. |
| Output Accuracy | ±2.5% for OUT1 (PWM mode); ±3.0% for OUT2/OUT3 - ensures reliable microcontroller and sensor rail regulation across temperature. |
| Thermal Protection | Thermal warning at +150°C; shutdown at +170°C with 15°C hysteresis - prevents latch-up during sustained overload or poor heatsinking. |
| Reset Timeout | Programmable 0.1ms to 7.8ms per channel - allows precise sequencing coordination with downstream processors and peripherals. |
| Package | 32-pin side-wettable QFND-EP (5mm × 5mm × 0.8mm) - supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow profiles. |
Pinout & Package
MAX16993ATJC/V+ uses a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed pad tied to GND for thermal management. Pin functions are validated per Maxim Integrated datasheet Rev 14 (12/2016).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | High-voltage input supply | Accepts 3.5V–36V battery input; internal UVLO starts at 4.5V, ensuring robust cold-crank operation. |
| EN1, EN2, EN3 | Independent enable inputs | Active-high digital controls allow staggered power-up: EN1 enables OUT1 first, then EN2/EN3 activate OUT2/OUT3 after OUT1 stabilization. |
| RESET1, RESET2, RESET3 | Open-drain reset outputs | Assert low when respective output drops >6% below nominal; timeout programmable via OTP - enables sequenced processor boot and fault isolation. |
| CSEL1, SSEN, SYNC | Configuration & synchronization I/O | CSEL1 selects 2.1MHz or divided frequency; SSEN enables spread-spectrum EMI reduction; SYNC accepts 1.7–2.4MHz external clock for system-wide noise alignment. |
| LX1, LX2, LX3 | Switching node terminals | Drive external high-efficiency inductors; LX1 supports high-side gate drive via BST1; LX2/LX3 optimized for low RDS(ON) FETs and minimal parasitic inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output architecture with cascaded topology | OUT2/OUT3 powered from OUT1 reduces total solution size and improves overall efficiency vs. independent buck designs. |
| Spread-spectrum enable (SSEN) | Reduces peak radiated emissions by spreading oscillator energy across ±6% bandwidth - simplifies EMC compliance testing without filter redesign. |
| Individual soft-start timers | 4ms for OUT1 and 2.5ms for OUT2/OUT3 prevent inrush current surges and ensure controlled power-up sequencing in multi-rail systems. |
| AEC-Q100 Grade-0 qualification | Validated for -40°C to +125°C ambient operation with full electrical characterization - meets automotive safety-critical power supply requirements. |
| Integrated 3A FETs on OUT2/OUT3 | Eliminates need for external MOSFETs and drivers, reducing BOM count and PCB area while maintaining >90% efficiency at 2A loads. |
Applications
| ADAS Camera Module Power | Infotainment System Core Rail |
|---|---|
Use Scenario: Dual-camera ECU requiring isolated 5.0V, 3.15V, and 1.2V rails with strict startup timing and low EMI. IC Role / Device Role / Timing Role: Primary PMIC providing regulated outputs, synchronized switching, and sequenced reset assertion for SoC and image sensors. Use Value: 2.1MHz operation avoids AM band interference; individual RESET_ outputs enable precise SoC boot coordination; side-wettable package ensures solder joint reliability in vibration-prone mounting. |
Use Scenario: Head-unit MCU, display driver, and audio codec requiring stable 3.3V, 1.8V, and 1.2V supplies with low quiescent current during sleep mode. IC Role / Device Role / Timing Role: Central power manager delivering three independent, sequenced outputs with programmable soft-start and reset timeout. Use Value: 30µA quiescent current extends battery life in key-off state; spread-spectrum mode suppresses radiated noise near sensitive RF receivers; AEC-Q100 qualification guarantees long-term field reliability. |
| Telematics Control Unit (TCU) | Automotive Gateway ECU |
Use Scenario: Cellular modem, GNSS receiver, and CAN transceiver powered from 12V battery with thermal constraints in compact enclosure. IC Role / Device Role / Timing Role: High-efficiency triple-buck regulator with thermal warning/shutdown and load-dump protection for harsh electrical environments. Use Value: 42V transient tolerance eliminates need for external TVS; thermal shutdown at +170°C prevents damage during prolonged high-temperature operation; 32-pin QFND-EP enables AOI-compatible assembly. |
Use Scenario: Multi-protocol gateway managing CAN FD, Ethernet, and LIN interfaces requiring tightly regulated 5.0V, 3.3V, and 1.8V rails. IC Role / Device Role / Timing Role: Sequencing PMIC with SYNC input to align switching edges across multiple power domains and reduce system-level noise coupling. Use Value: SYNC input accepts 1.7–2.4MHz external clock - enables deterministic noise spectrum alignment with Ethernet PHY or CAN FD transceivers; individual EN_/RESET_ pins support protocol-specific power management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel automotive DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20096ATPA/V+ | Single 3.5V–36V buck controller + dual 2.2MHz buck converters; integrates LDOs and watchdog timer; higher integration but no spread-spectrum option. | Better suited for systems requiring integrated system monitoring and backup LDOs; lacks SSEN pin for EMI tuning. | Select MAX20096ATPA/V+ when watchdog functionality and auxiliary LDOs are required; choose MAX16993ATJC/V+ when spread-spectrum EMI control and simpler configuration are prioritized. |
| TPS65321A-Q1 | Triple-buck PMIC with 2.2MHz switching, but fixed 3.3V/1.2V/1.0V outputs; no frequency select or spread-spectrum; lower quiescent current (25µA). | Targeted at fixed-rail applications like MCU cores; lacks adjustable outputs and programmable reset timeout. | Select TPS65321A-Q1 for cost-sensitive, fixed-voltage designs where flexibility is secondary; retain MAX16993ATJC/V+ for designs needing resistor-adjustable outputs and configurable sequencing. |
Compared with MAX20096ATPA/V+ and TPS65321A-Q1, the MAX16993ATJC/V+ offers unique trade-offs: it provides pin-selectable frequency and spread-spectrum capability not found in the TPS65321A-Q1, and simpler configuration than the MAX20096ATPA/V+'s integrated watchdog - making it optimal for EMI-sensitive, adjustable-rail automotive subsystems where design flexibility outweighs added system-monitoring features.
Availability
MAX16993ATJC/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics ECUs requiring stable component supply, AEC-Q100 compliance, and production-ready packaging with side-wettable leads.
Supply support for MAX16993ATJC/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for demanding applications including automotive, industrial, and communications systems.
The MAX16993ATJC/V+ belongs to Maxim's automotive-grade PMIC product line, designed specifically to deliver compact, efficient, and robust multirail power solutions for next-generation vehicle electronics operating under extreme voltage, temperature, and EMI conditions.
FAQ
What is the maximum input voltage rating for MAX16993ATJC/V+?
The MAX16993ATJC/V+ supports a continuous input voltage range of 3.5V to 36V on the VSUP pin and is protected against load-dump transients up to 42V for ≤50ns. This makes it suitable for direct connection to 12V and 24V automotive batteries without external transient suppression components in most cases.
Does MAX16993ATJC/V+ support adjustable output voltages?
Yes, MAX16993ATJC/V+ supports both fixed and adjustable outputs. OUT1 can be set to factory-trimmed values (e.g., 3.3V or 5.0V) or adjusted between 3.0V and 5.5V using an external resistor divider on FB1. OUT2 and OUT3 are adjustable from 0.8V to 3.95V via external feedback dividers connected to OUT2/OUT3 pins.
How does the spread-spectrum feature work on MAX16993ATJC/V+?
The MAX16993ATJC/V+ uses the SSEN pin to enable spread-spectrum modulation: when SSEN is pulled to BIAS, the internal oscillator frequency varies between fSW and fSW + 6% with a 4kHz sawtooth profile. This reduces peak radiated emissions without altering average frequency or requiring layout changes - ideal for passing CISPR 25 Class 5 tests.
What is the purpose of the CSEL1 pin on MAX16993ATJC/V+?
The CSEL1 pin on MAX16993ATJC/V+ selects the switching frequency of the high-voltage OUT1 controller: connecting CSEL1 to GND sets 2.1MHz operation, while connecting it to BIAS enables factory-programmed divide-down options (1.05MHz, 525kHz, 420kHz, or 350kHz). OUT2 and OUT3 remain fixed at 2.1MHz regardless of CSEL1 state.
Can MAX16993ATJC/V+ be synchronized to an external clock source?
Yes, MAX16993ATJC/V+ supports external synchronization via the SYNC pin. When configured as an input, it accepts a 1.7MHz–2.4MHz external clock with 50% duty cycle to align switching edges across multiple power supplies - reducing beat frequencies and improving system-level EMI performance in complex ECUs.
MAX16993ATJC/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- 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/V+ FAQ
1.How can I place an order for MAX16993ATJC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJC/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 MAX16993ATJC/V+ reliable?
The price and inventory of MAX16993ATJC/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16993ATJC/V+ is usually 5 days.
3.What payment methods are accepted for MAX16993ATJC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJC/V+?
MAX16993ATJC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJC/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 MAX16993ATJC/V+?
For technical support, including MAX16993ATJC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJC/V+ requirements.
6.How does Aetrix verify that MAX16993ATJC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJC/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 MAX16993ATJC/V+ meets industry standards.
7.What is the process for return or replacement of MAX16993ATJC/V+?
All MAX16993ATJC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJC/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 MAX16993ATJC/V+ part is unused and in its original packaging.
Return procedure for MAX16993ATJC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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