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Analog Devices Inc./Maxim Integrated MAX16993ATJG+
- Part No.:
- MAX16993ATJG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJG+.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,650
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Product details
Overview
MAX16993ATJG+ from Maxim Integrated is a 3-channel automotive-grade 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 supports 3.5V–36V input, delivers up to 3A per low-voltage channel, consumes only 30µA quiescent current, and is AEC-Q100 qualified for under-hood infotainment power rails.
For engineers reviewing the MAX16993ATJG+ datasheet, MAX16993ATJG+ pinout, MAX16993ATJG+ application, or MAX16993ATJG+ equivalent, key selection criteria include its cascaded architecture (OUT2/OUT3 powered from OUT1), pin-selectable 2.1MHz/1.05MHz/525kHz/420kHz/350kHz switching, individual RESET_ outputs with programmable timeout, spread-spectrum enable (SSEN), and SYNC input for external clock synchronization.
Technical Context
The MAX16993ATJG+ implements a current-mode control architecture with forced-PWM and skip modes, enabling stable regulation across wide load ranges while minimizing EMI. Its OUT1 controller features integrated high- and low-side gate drivers (DH1/DL1), BST1 bootstrap supply, and current-sense inputs (CS1/OUT1) for cycle-by-cycle overcurrent protection.
OUT2 and OUT3 operate in 180° out-of-phase mode from the same 2.1MHz clock, reducing input ripple and improving thermal distribution. Each includes dedicated PV_, LX_, PGND_, and RESET_ terminals, with independent enable (EN2/EN3) and voltage-sense (OUT2/OUT3) pins-enabling flexible sequencing and fault isolation in multi-rail 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. |
| Switching Frequency | Pin-selectable: 2.1MHz (CSEL1 = GND) or factory-set 1.05/0.525/0.42/0.35MHz - allows AM-band avoidance or efficiency optimization. |
| Quiescent Current | 30µA with OUT1 enabled - meets automotive "always-on" low-power requirements for telematics and ADAS wake-up circuits. |
| Output Current Capability | OUT2/OUT3: up to 3.0A each (IMAX = 3.0A option); OUT1: controller-only (external FETs required) - supports high-current digital loads like SoCs and displays. |
| Output Voltage Accuracy | ±2.5% for OUT1 (PWM mode), ±3.0% for OUT2/OUT3 - ensures reliable logic-level compliance across -40°C to +125°C without precision resistors. |
| Thermal Protection | Thermal warning at +150°C, shutdown at +170°C with 15°C hysteresis - provides fail-safe operation in sealed enclosures. |
| Reset Threshold Accuracy | RESET_ asserts when output falls to 90–95% of nominal; releases after fixed timeout (0.1ms–7.8ms) - enables precise power-good sequencing for microcontrollers. |
Pinout & Package
MAX16993ATJG+ uses a 32-pin TQFN-EP (5mm × 5mm × 0.75mm) with side-wettable QFND-EP variant, featuring exposed pad (EP = GND) for enhanced thermal dissipation. Package is AEC-Q100 qualified and rated for -40°C to +125°C ambient operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PV1) | Buck 1 low-side gate drive supply | Provides dedicated 5V rail for DL1 driver; requires ≥0.1µF ceramic bypass to GND - isolates gate-drive noise from analog ground. |
| 4 (LX1) | Buck 1 switch node | Connects to inductor; serves as return path for DH1 high-side drive - critical for minimizing layout parasitics and EMI. |
| 8 (EN1) | High-voltage tolerant enable for OUT1 | Active-high, 1.6–2.0V threshold; enables full PMIC startup sequence - allows ignition-controlled power activation. |
| 14/15 (EN2/EN3) | Independent enables for OUT2/OUT3 | Enable downstream rails only after OUT1 stabilizes - supports safe power sequencing for processors and peripherals. |
| 26 (CSEL1) | Buck 1 clock select | GND = 2.1MHz; BIAS = factory-divided frequency - configures switching speed without external components. |
| 27 (SSEN) | Spread-spectrum enable | GND = fixed frequency; BIAS = ±6% sawtooth modulation at 4kHz - reduces peak EMI without changing layout. |
| 32 (SYNC) | Frequency synchronization I/O | Accepts 1.7–2.4MHz external clock; enables system-wide timing alignment - eliminates beat frequencies in multi-PMIC designs. |
Key Features
| Feature | Design Value |
|---|---|
| Cascaded architecture (OUT2/OUT3 from OUT1) | Improves overall system efficiency by eliminating redundant conversion stages - reduces heat generation and component count in multi-rail systems. |
| Individual open-drain RESET_ outputs (RESET1/2/3) | Provide independent power-good signals with programmable timeout (0.1–7.8ms) - enables precise boot sequencing for multi-core SoCs and FPGA configurations. |
| Integrated BIAS LDO (5V, 100mA) | Supplies internal circuitry and PV1 during startup; transitions to OUT1 post-soft-start - eliminates need for external bias supply and simplifies BOM. |
| 180° out-of-phase operation for OUT2/OUT3 | Halves input capacitor RMS current and reduces thermal stress on shared input rails - extends capacitor lifetime in compact automotive modules. |
| Factory-trimmed fixed-output options | Supports 3.3V, 5.0V, 3.15V, and 1.8V outputs with ±3% accuracy over temp/load - removes requirement for 0.1% feedback resistors in cost-sensitive designs. |
Applications
| Infotainment Head Unit Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers display processor (3.3V), image sensor (1.8V), and ISP core (1.2V) from 12V battery in automotive head unit. IC Role / Device Role / Timing Role: Single-chip triple-output PMIC providing sequenced, regulated rails with independent reset signaling. Use Value: Reduces board area by 40% vs. discrete DC-DC solutions; 2.1MHz operation avoids AM radio band interference. |
Use Scenario: Supplies 3.15V for CIS interface and 1.8V for MIPI CSI-2 serializer in rear-view camera module. IC Role / Device Role / Timing Role: Cascaded buck architecture delivers clean, low-noise power with fast transient response to image capture bursts. Use Value: 30µA quiescent current enables always-on camera functionality without draining battery during parking mode. |
| Telematics Control Unit (TCU) | Automotive Gateway ECU |
|
Use Scenario: Generates 5.0V for cellular modem, 3.3V for MCU, and 1.2V for RF transceiver in LTE/V2X telematics unit. IC Role / Device Role / Timing Role: High-voltage controller (OUT1) handles cold-crank down to 3.5V; dual low-voltage converters support mixed-signal loads. Use Value: Load-dump tolerance up to 42V eliminates need for external TVS diodes - improves reliability in harsh electrical environments. |
Use Scenario: Powers CAN FD transceivers (3.3V), Ethernet PHY (1.8V), and microcontroller (5.0V) in vehicle gateway ECU. IC Role / Device Role / Timing Role: SYNC input synchronizes switching with other PMICs to suppress system-level EMI in multi-processor architectures. Use Value: Spread-spectrum enable (SSEN) reduces radiated emissions by >10dB at fundamental frequency - aids EMC certification. |
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/VY+ | Single 3.5–36V input, dual 3A synchronous buck; no high-voltage controller channel - requires external HV buck for first-stage conversion. | Lacks integrated HV controller; suitable only when primary rail is pre-regulated (e.g., 5V or 3.3V input). | Select MAX20096ATPA/VY+ only if system already provides a stable intermediate rail; MAX16993ATJG+ is superior for direct-battery architectures. |
| TPS653221AQPWPRQ1 | 3-channel automotive PMIC with integrated LDOs; fixed 2.2MHz frequency; no spread-spectrum or SYNC input - less flexible EMI control. | Includes 150mA LDOs but lacks cascaded topology - less efficient for high-current digital loads requiring >1.5A per rail. | Choose TPS653221AQPWPRQ1 for simpler, lower-cost designs where EMI margins are sufficient and LDO integration is prioritized. |
Compared with MAX20096ATPA/VY+ and TPS653221AQPWPRQ1, the MAX16993ATJG+ uniquely combines a high-voltage controller with dual low-voltage converters in one package, offers pin-selectable frequency and spread-spectrum capability, and delivers higher efficiency in battery-fed automotive systems requiring >3A total output current.
Availability
MAX16993ATJG+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, telematics control units, and gateway ECUs requiring stable component supply across extended temperature and lifecycle demands.
Supply support for MAX16993ATJG+ 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 automotive, industrial, and communications markets.
The MAX16993ATJG+ belongs to Maxim's automotive-qualified PMIC portfolio, designed specifically to replace discrete power solutions in space-constrained, thermally demanding vehicle subsystems with stringent EMI and reliability requirements.
FAQ
What is the maximum input voltage rating for MAX16993ATJG+ and how does it handle automotive transients?
The MAX16993ATJG+ supports continuous input voltages up to 36V and is protected against load-dump transients up to 42V. This rating allows direct connection to the automotive battery without external TVS diodes in most 12V systems. The device incorporates internal overvoltage clamping and robust gate-drive design to sustain these transients without latch-up or degradation, meeting ISO 7637-2 Pulse 5a requirements when used with recommended input filtering.
Can MAX16993ATJG+ generate three independent output voltages, and what are the supported ranges?
Yes, the MAX16993ATJG+ supports three independent output voltages: OUT1 (3.0V–5.5V, fixed or adjustable), OUT2 (0.8V–3.95V), and OUT3 (0.8V–3.95V). Fixed options include 3.3V, 5.0V, 3.15V, and 1.8V with ±3% accuracy over temperature and load. Adjustable versions use external resistor dividers referenced to 1.0V (OUT1) or 0.815V (OUT2/OUT3) feedback thresholds - enabling custom rail generation for diverse SoCs and sensors.
How does the cascaded architecture of MAX16993ATJG+ improve system efficiency?
The MAX16993ATJG+ improves system efficiency by powering OUT2 and OUT3 directly from the regulated OUT1 output instead of the raw battery voltage. This eliminates a second high-voltage conversion stage, reducing conduction losses and thermal dissipation. For example, converting 12V → 5V → 1.8V yields ~85% end-to-end efficiency, versus ~75% for two independent 12V → 1.8V converters - a measurable gain in thermally constrained modules like camera housings or instrument clusters.
What is the function of the SSEN pin on MAX16993ATJG+, and when should it be enabled?
The SSEN (Spread-Spectrum Enable) pin on MAX16993ATJG+ activates ±6% frequency modulation at 4kHz when pulled to BIAS, spreading spectral energy to reduce peak radiated emissions. It should be enabled during EMC testing or in noise-sensitive applications like infotainment audio paths. When disabled (SSEN = GND), the device operates at fixed frequency - preferred for deterministic timing or when synchronized to an external clock via SYNC.
Does MAX16993ATJG+ support power sequencing, and how is it implemented?
Yes, MAX16993ATJG+ supports hardware-based power sequencing via independent EN1, EN2, and EN3 inputs and individual open-drain RESET_ outputs. EN1 must be asserted first to enable OUT1; once OUT1 completes its 4ms soft-start, EN2/EN3 can be asserted to ramp OUT2/OUT3 with 2.5ms soft-start. RESET_ signals go high only after their respective outputs reach regulation and remain asserted for a programmable timeout - enabling precise boot-order control for complex processors without external sequencers.
MAX16993ATJG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- 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)
MAX16993ATJG+ FAQ
1.How can I place an order for MAX16993ATJG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJG+ 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 MAX16993ATJG+ reliable?
The price and inventory of MAX16993ATJG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16993ATJG+ is usually 5 days.
3.What payment methods are accepted for MAX16993ATJG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJG+?
MAX16993ATJG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJG+ 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 MAX16993ATJG+?
For technical support, including MAX16993ATJG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJG+ requirements.
6.How does Aetrix verify that MAX16993ATJG+ is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJG+ 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 MAX16993ATJG+ meets industry standards.
7.What is the process for return or replacement of MAX16993ATJG+?
All MAX16993ATJG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJG+, 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 MAX16993ATJG+ part is unused and in its original packaging.
Return procedure for MAX16993ATJG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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