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Analog Devices Inc./Maxim Integrated MAX16993ATJC/V+T
- Part No.:
- MAX16993ATJC/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJC/V+T.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,269
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Product details
Overview
The MAX16993ATJC/V+T from Maxim Integrated is an AEC-Q100 qualified automotive power-management IC (PMIC) integrating one high-voltage synchronous step-down controller (OUT1) and two low-voltage synchronous step-down converters (OUT2/OUT3) cascaded from OUT1. It operates from 3.5V–36V input, delivers up to 3A per low-voltage channel, supports 2.1MHz switching, consumes only 30µA quiescent current, and targets infotainment, ADAS camera modules, and telematics ECUs.
For engineers reviewing the MAX16993ATJC/V+T datasheet, MAX16993ATJC/V+T pinout, MAX16993ATJC/V+T application, or MAX16993ATJC/V+T equivalent, key selection criteria include its -40°C to +125°C operation, side-wettable QFND-EP package, individual RESET_ outputs with programmable timeout, spread-spectrum enable (SSEN), and SYNC input for external clock synchronization in noise-sensitive automotive systems.
Technical Context
The MAX16993ATJC/V+T implements a current-mode architecture with forced-PWM and skip modes across all three channels. Its OUT1 controller uses internal high- and low-side gate drivers (DH1/DL1) with 1Ω–4Ω on-resistance, while OUT2/OUT3 integrate 50mΩ–110mΩ MOSFETs and operate exclusively from OUT1's output voltage.
Frequency configuration is pin-selectable via CSEL1 (GND = 2.1MHz; BIAS = factory-divided options: 1.05MHz/525kHz/420kHz/350kHz). Synchronization is supported through the SYNC pin (1.7–2.4MHz range), and spread-spectrum modulation (±6% frequency dither at 4kHz) is enabled via SSEN, reducing EMI without requiring layout changes.
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 rail. |
| Switching Frequency | 2.1MHz (CSEL1 = GND); factory-set alternatives available - avoids AM band interference and minimizes inductor size. |
| Quiescent Current | 30µA with OUT1 enabled - meets automotive "always-on" low-power requirements for wake-up circuits. |
| Output Current Capability | OUT2/OUT3: up to 3A each (IMAX = 3.0A option) - supports high-current microcontrollers and image sensors. |
| Output Voltage Range | OUT1: 3.0V–5.5V (fixed or resistor-adjustable); OUT2/OUT3: 0.8V–3.95V - covers core logic, I/O, and analog supply needs. |
| Thermal Protection | Thermal warning at +150°C; shutdown at +170°C with 15°C hysteresis - ensures robust operation in under-hood environments. |
| AEC-Q100 Grade | Qualified to Grade 0 (−40°C to +125°C junction) - certified for safety-critical automotive applications. |
Pinout & Package
The MAX16993ATJC/V+T is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm), optimized for automated optical inspection (AOI) and solder joint reliability in automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | Main HV input supply | Accepts 3.5V–36V battery input; includes UVLO startup threshold at 4.5V (typ). |
| EN1, EN2, EN3 | Independent enable inputs | Active-high digital controls; EN1 enables entire PMIC; EN2/EN3 independently activate OUT2/OUT3 after OUT1 is stable. |
| OUT1, OUT2, OUT3 | Output voltage sense inputs | Connect directly to respective output nodes for regulation; support fixed or resistor-divider feedback configurations. |
| RESET1, RESET2, RESET3 | Open-drain reset outputs | Assert low when output drops >6% below nominal; timeout programmable from 0.1ms to 7.8ms - enables sequenced system boot. |
| SSEN | Spread-spectrum enable | Pull to BIAS to activate ±6% frequency dither at 4kHz - reduces peak EMI without altering PCB layout. |
| SYNC | Frequency synchronization I/O | Configurable as input (1.7–2.4MHz external clock) or logic-controlled mode selector - eliminates beat frequencies in multi-rail systems. |
| CSEL1 | Buck 1 clock select | GND = 2.1MHz; BIAS = factory-programmed divide ratio (×2/×4/×5/×6) - enables flexible EMI tuning per design stage. |
| EP | Exposed thermal pad | Must be connected to GND plane; provides 2.8°C/W θJC path - critical for thermal management at full 3A loads. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output architecture with cascaded topology | OUT2/OUT3 powered from OUT1 improves overall efficiency vs. independent buck stages - reduces total power loss by ~8% at 2A load. |
| 180° out-of-phase operation of OUT2/OUT3 | Reduces input capacitance ripple current by 30% compared to in-phase switching - lowers required bulk capacitance and board area. |
| Individual soft-start timers | 4ms for OUT1; 2.5ms for OUT2/OUT3 - prevents inrush current overload during cold cranking and supports controlled power sequencing. |
| Integrated BIAS LDO with auto-transition | 5V LDO powers internal circuitry pre-soft-start; switches to OUT1 post-startup - eliminates need for external bias supply and simplifies BOM. |
| Robust fault protection suite | Includes overcurrent limiting (100–150mV CS threshold), thermal shutdown (+170°C), and output overvoltage detection - meets ASIL-B functional safety readiness. |
Applications
| ADAS Camera Module Power Supply | Automotive Infotainment SoC Core Rail |
|---|---|
Use Scenario: Powers image sensor, ISP, and interface logic in rear-view or surround-view cameras exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Provides tightly regulated 1.2V (OUT3), 3.3V (OUT2), and 5.0V (OUT1) rails with synchronized startup and independent reset signaling. Use Value: 30µA quiescent current extends battery life during vehicle sleep mode; AEC-Q100 Grade 0 ensures reliable operation at +125°C ambient. |
Use Scenario: Supplies core voltage, I/O, and memory rails for quad-core automotive-grade application processors in head units. IC Role / Device Role / Timing Role: Delivers 3A @ 1.0V (OUT3), 3A @ 1.8V (OUT2), and 5V @ 1.5A (OUT1) with 180° phase shift between low-voltage outputs. Use Value: 2.1MHz switching enables use of 1.0µH inductors, reducing solution footprint by 40% vs. 500kHz alternatives; spread-spectrum mode suppresses EMI peaks near 2.1MHz. |
| Telematics Control Unit (TCU) PMIC | Automotive Gateway ECU Power Management |
Use Scenario: Manages power for LTE modem, GNSS receiver, CAN FD transceivers, and secure MCU in cellular-connected vehicle modules. IC Role / Device Role / Timing Role: Generates isolated, monitored rails with individual ENABLE/RESET control per subsystem; supports wake-on-CAN via low-IQ OUT1 standby. Use Value: Individual RESET_ outputs with programmable timeout (0.1–7.8ms) enable precise boot sequencing across heterogeneous subsystems; SYNC input allows clock alignment with baseband processor. |
Use Scenario: Centralized power delivery for multi-protocol gateway handling CAN, LIN, Ethernet, and wireless coexistence in Zonal E/E architectures. IC Role / Device Role / Timing Role: Acts as primary PMIC supplying 3.3V I/O, 1.2V core, and 5V analog rails; SSEN and SYNC features mitigate cross-domain noise coupling. Use Value: Side-wettable QFND-EP package ensures solder joint reliability during thermal cycling; -40°C to +125°C rating matches gateway under-dash mounting requirements. |
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 bucks; integrates watchdog timer and SPI interface; no spread-spectrum; 32-pin TQFN (5mm × 5mm). | Requires external sequencing logic; lacks SSEN pin; supports diagnostics via SPI - better suited for ASIL-C systems needing fault logging. | Select MAX20096ATPA/V+ when diagnostic coverage (ISO 26262) and watchdog supervision are mandatory; avoid if spread-spectrum EMI reduction is required. |
| TPS653211AQPWPRQ1 | Triple-buck PMIC with integrated LDOs; 2.2MHz switching; 36V max input; no spread-spectrum; 32-pin HTSSOP (9.7mm × 4.4mm). | Larger footprint; no side-wettable package; includes 3x LDOs but lower current capability (1.5A max per buck); no SYNC input. | Select TPS653211AQPWPRQ1 when mixed buck/LDO integration is preferred and board space is not constrained; avoid for compact, high-EMI environments due to lack of SSEN/SYNC. |
Compared with MAX20096ATPA/V+ and TPS653211AQPWPRQ1, the MAX16993ATJC/V+T uniquely combines spread-spectrum EMI suppression, SYNC-based clock alignment, and side-wettable packaging - making it optimal for space-constrained, noise-sensitive automotive modules where AOI reliability and radiated emissions compliance are critical.
Availability
The MAX16993ATJC/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX16993ATJC/V+T 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 - with deep expertise in high-reliability, AEC-Q100-compliant solutions.
The MAX16993ATJC/V+T belongs to Maxim's automotive PMIC family, engineered specifically for compact, high-efficiency power delivery in safety-critical vehicle subsystems - emphasizing low quiescent current, thermal robustness, and EMI control.
FAQ
What is the maximum input voltage the MAX16993ATJC/V+T can withstand during load-dump events?
The MAX16993ATJC/V+T is protected against load-dump transients up to 42V on the VSUP pin, exceeding ISO 7637-2 Pulse 5a requirements. This allows direct connection to the automotive battery without external TVS clamping in most standard 12V systems. The device remains functional during transient events ≤50ns, and its internal protection circuitry prevents latch-up or permanent damage under specified conditions.
Does the MAX16993ATJC/V+T support independent power sequencing for its three outputs?
Yes, the MAX16993ATJC/V+T supports fully independent sequencing via EN1, EN2, and EN3 pins. EN1 must be asserted first to enable OUT1; once OUT1 reaches regulation, EN2 and EN3 can be asserted to ramp up OUT2 and OUT3 with their own 2.5ms soft-start. Each output also has a dedicated open-drain RESET_ signal with programmable timeout (0.1ms–7.8ms), enabling precise, hardware-controlled boot order without software intervention.
Can the MAX16993ATJC/V+T operate in forced-PWM mode across all load conditions?
Yes, the MAX16993ATJC/V+T supports forced-PWM mode via the SYNC pin: applying a logic-high signal (≥1.8V) or an external clock (1.7–2.4MHz) forces all three regulators into fixed-frequency PWM operation, eliminating low-load frequency variation and associated audio noise. This mode is essential for noise-sensitive applications like camera ISPs or audio codecs where skip-mode artifacts must be avoided.
What package type does the MAX16993ATJC/V+T use, and why is it significant for automotive manufacturing?
The MAX16993ATJC/V+T uses a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm). Its side-wettable leads enable automated optical inspection (AOI) of solder joints - a critical requirement for zero-defect automotive production. Unlike standard QFNs, this package provides visible solder fillets on all perimeter pins, allowing inline verification of reflow quality and improving field reliability in thermally demanding under-hood applications.
How does the spread-spectrum feature of the MAX16993ATJC/V+T reduce electromagnetic interference?
The MAX16993ATJC/V+T's spread-spectrum function, enabled by pulling SSEN to BIAS, modulates the internal oscillator frequency between fSW and fSW + 6% at a 4kHz sawtooth rate. This spreads radiated energy across a 126kHz bandwidth (at 2.1MHz center), reducing peak EMI by up to 10dB compared to fixed-frequency operation - helping systems meet CISPR 25 Class 5 limits without adding ferrite beads or shielding.
MAX16993ATJC/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX16993ATJC/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJC/V+T 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+T reliable?
The price and inventory of MAX16993ATJC/V+T 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+T is usually 5 days.
3.What payment methods are accepted for MAX16993ATJC/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJC/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJC/V+T?
MAX16993ATJC/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJC/V+T 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+T?
For technical support, including MAX16993ATJC/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJC/V+T requirements.
6.How does Aetrix verify that MAX16993ATJC/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJC/V+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX16993ATJC/V+T?
All MAX16993ATJC/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJC/V+T, 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+T part is unused and in its original packaging.
Return procedure for MAX16993ATJC/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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