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Analog Devices Inc./Maxim Integrated MAX16993ATJH+
- Part No.:
- MAX16993ATJH+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJH+.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,551
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Product details
Overview
The MAX16993ATJH+ from Maxim Integrated is an AEC-Q100 qualified automotive PMIC integrating a 3.5V–36V high-voltage synchronous step-down controller (OUT1) and two cascaded low-voltage synchronous step-down converters (OUT2/OUT3), delivering up to 3A per channel at 2.1MHz switching frequency, with 30µA quiescent current and -40°C to +125°C operation - used in ADAS camera modules, infotainment power rails, and body control units.
For engineers reviewing the MAX16993ATJH+ datasheet, MAX16993ATJH+ pinout, MAX16993ATJH+ application, or MAX16993ATJH+ equivalent, key selection criteria include its 36V input tolerance, individual enable/RESET_ signals per rail, spread-spectrum EMI reduction, SYNC input for system-level clock alignment, and side-wettable QFND-EP package for automated optical inspection.
Technical Context
The MAX16993ATJH+ implements a current-mode architecture with forced-PWM and skip modes across all three regulators, enabling stable light-load efficiency and predictable transient response. Its OUT1 controller supports pin-selectable 2.1MHz or factory-set lower frequencies (1.05MHz/525kHz/420kHz/350kHz), while OUT2/OUT3 operate fixed at 2.1MHz and are powered directly from OUT1's output - eliminating external bias supplies.
Each regulator features independent enable inputs (EN1/EN2/EN3), open-drain RESET_ outputs with programmable timeout (0.1ms–7.8ms), and overtemperature/overcurrent protection. The BIAS LDO transitions from 5V to OUT1 voltage post-soft-start, powering internal circuitry without external dependencies.
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 pre-regulator. |
| Switching Frequency | 2.1MHz (pin-selectable); eliminates AM-band interference and allows use of compact 1µH inductors. |
| Quiescent Current | 30µA with OUT1 enabled - meets automotive "always-on" low-power requirements for wake-up circuits. |
| Output Current Capability | Up to 3A per OUT2/OUT3 channel; OUT1 drives external FETs - supports multi-rail SoC and sensor subsystems. |
| Output Voltage Accuracy | ±2.5% for OUT1 (PWM mode); ±3.0% for OUT2/OUT3 - ensures reliable logic-level compliance across temperature and load. |
| Operating Temperature | -40°C to +125°C ambient - qualified for under-hood and passenger compartment automotive deployment. |
| AEC-Q100 Grade | Grade 0 (−40°C to +150°C junction) - certified for safety-critical automotive applications. |
Pinout & Package
The MAX16993ATJH+ is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm), optimized for automated optical inspection (AOI) and thermal performance (θJA = 37°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | Main high-voltage supply input | Accepts 3.5V–36V battery input; includes UVLO startup threshold at 4.5V and 42V transient protection. |
| EN1 / EN2 / EN3 | Independent digital enable inputs | Active-high logic; enables staged power-up sequencing - EN1 must assert before OUT2/OUT3 can be enabled. |
| OUT1 / OUT2 / OUT3 | Output voltage sense & current-sense return | Provides feedback path for regulation and current monitoring; OUT1 also serves as PV supply for downstream converters. |
| RESET1 / RESET2 / RESET3 | Open-drain reset outputs | Assert low when respective output drops >6% below nominal; timeout programmable (0.1–7.8ms) for system boot coordination. |
| SSEN | Spread-spectrum enable control | Connect to BIAS to activate ±6% frequency dithering at 4kHz - reduces peak EMI by >10dB without changing layout. |
| SYNC | Frequency synchronization I/O | Configurable as input: accepts 1.7–2.4MHz external clock for deterministic noise alignment across multiple rails. |
| CSEL1 | Buck 1 oscillator frequency select | GND = 2.1MHz; BIAS = factory-divided frequency (1.05MHz/525kHz/420kHz/350kHz) - enables EMI optimization per design. |
Key Features
| Feature | Design Value |
|---|---|
| Three independent DC-DC regulators | Enables single-chip power tree for SoC + memory + interface ICs - eliminates discrete PMIC stacking and reduces BOM count by ≥40%. |
| Cascaded architecture (OUT2/OUT3 from OUT1) | Improves overall system efficiency by 8–12% vs. independent buck converters - reduces heat dissipation and simplifies thermal design. |
| Side-wettable QFND-EP package | Supports AOI-compatible solder joint inspection - critical for zero-defect automotive manufacturing and long-term field reliability. |
| Individual soft-start timers | 4ms for OUT1, 2.5ms for OUT2/OUT3 - prevents inrush current overload during cold-cranking and enables precise power sequencing. |
| Integrated BIAS LDO with auto-transition | Starts at 5V for bootstrap, then switches to OUT1 voltage post-soft-start - removes need for external bias supply and improves PSRR. |
Applications
| ADAS Camera Power Supply | Infotainment System Core Rail |
|---|---|
Use Scenario: Powers image sensor, ISP, and MIPI interface in rear-view or surround-view camera modules operating in engine bay or bumper locations. IC Role / Device Role / Timing Role: Primary PMIC providing isolated 3.3V (OUT1), 1.8V (OUT3), and 3.15V (OUT2) rails with synchronized startup and fault reporting. Use Value: 36V input tolerance handles load-dump events; 30µA quiescent current extends battery life in parked surveillance mode. | Use Scenario: Supplies processor core, DDR memory, and display controller in head-unit systems requiring tight voltage accuracy and low noise. IC Role / Device Role / Timing Role: Centralized power manager delivering sequenced 0.85V (OUT2), 1.1V (OUT3), and 3.3V (OUT1) with spread-spectrum EMI reduction. Use Value: 2.1MHz switching avoids AM/FM bands; individual RESET_ signals enable safe processor reset on rail fault detection. |
| Body Control Module (BCM) | Automotive Gateway ECU |
Use Scenario: Powers microcontroller, CAN transceivers, LIN interfaces, and LED drivers in door modules or lighting controllers. IC Role / Device Role / Timing Role: Multi-output regulator supporting mixed-voltage peripherals with independent enable control and thermal warning via ERR pin. Use Value: AEC-Q100 Grade 0 qualification ensures operation at 150°C junction; SYNC input aligns switching noise with other ECUs to reduce system-level EMI. | Use Scenario: Provides regulated supplies for ARM-based gateway SoCs managing Ethernet, CAN FD, and wireless connectivity. IC Role / Device Role / Timing Role: High-efficiency triple-buck PMIC delivering 1.0V core, 1.8V I/O, and 3.3V interface rails with programmable reset timeouts for fail-safe boot. Use Value: Cascaded topology reduces component count and PCB area; CSEL1 pin-selectable frequency allows EMI tuning per vehicle platform. |
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 + dual 2.1MHz bucks; same package but adds integrated watchdog timer and enhanced diagnostics. | Preferred where functional safety (ASIL-B) monitoring is required beyond basic reset signaling. | Select MAX20096ATPA/V+ if diagnostic coverage, windowed watchdog, or enhanced fault logging is needed. |
| TPS653211C0RGER | 3.5V–36V buck controller + dual 2.2MHz bucks; TI's pin-compatible alternative with different soft-start timing and no spread-spectrum option. | Used in non-Maxim-design legacy platforms where footprint reuse is prioritized over EMI flexibility. | Select TPS653211C0RGER only when migrating existing TI-based designs with identical layout constraints. |
Compared with MAX20096ATPA/V+, the MAX16993ATJH+ offers lower quiescent current (30µA vs. 45µA) and built-in spread-spectrum, but lacks integrated watchdog; versus TPS653211C0RGER, it provides superior EMI control and tighter output accuracy (±2.5% vs. ±3.5%), though with different enable timing behavior.
Availability
MAX16993ATJH+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head-units, and body control units requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX16993ATJH+ 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.
The MAX16993ATJH+ belongs to Maxim's automotive-grade PMIC portfolio, engineered specifically for high-reliability, multi-rail power delivery in harsh environments - targeting camera modules, gateways, and domain controllers needing compact, low-noise, and thermally robust solutions.
FAQ
What is the maximum input voltage rating for the MAX16993ATJH+ and how does it handle automotive transients?
The MAX16993ATJH+ supports a continuous input voltage range of 3.5V to 36V and is protected against load-dump transients up to 42V for ≤50ns. This rating enables direct connection to the automotive battery without external TVS clamping in most applications. The device incorporates internal overvoltage protection that discharges OUT1 upon FB1 overvoltage detection, ensuring robustness during ISO 7637-2 pulse 5a events. MAX16993ATJH+ maintains regulation and does not latch off during these transients.
Does the MAX16993ATJH+ support output voltage adjustment, and what are the factory-fixed options?
Yes, the MAX16993ATJH+ supports both fixed and adjustable output voltages. For OUT1, factory-trimmed fixed options include 3.3V (FB1 = GND), 5.0V, and 3.15V (FB1 = BIAS); adjustable mode uses a resistor divider to set 3.0V–5.5V with 1.0V feedback reference. OUT2/OUT3 offer fixed 3.15V/1.8V or adjustable 0.8V–3.95V via external dividers. MAX16993ATJH+ achieves ±3% total output error over line, load, and temperature without precision resistors.
How does the spread-spectrum feature of the MAX16993ATJH+ reduce EMI, and what is its operational impact?
The MAX16993ATJH+ spread-spectrum function modulates the internal oscillator frequency between fSW and fSW + 6% with a 4kHz sawtooth profile, reducing peak radiated emissions by up to 12dB. Activated by pulling SSEN high to BIAS, it introduces no timing jitter in PWM mode and does not affect output voltage regulation or transient response. MAX16993ATJH+ maintains full current-mode control stability during spread-spectrum operation, making it ideal for EMI-sensitive camera and radar applications.
Can the MAX16993ATJH+ be synchronized to an external clock, and what are the valid frequency and duty-cycle requirements?
Yes, the MAX16993ATJH+ SYNC pin supports external clock synchronization when configured as an input (factory-programmed). It accepts frequencies from 1.7MHz to 2.4MHz with a 50% ±5% duty cycle. When driven by an external clock, MAX16993ATJH+ locks its internal oscillator phase and frequency, enabling deterministic noise alignment across multiple power rails - critical for reducing beat frequencies in multi-PMIC systems like automotive gateways.
What thermal protection mechanisms are implemented in the MAX16993ATJH+, and how do they behave during overload?
The MAX16993ATJH+ integrates thermal warning at +150°C and thermal shutdown at +170°C with 15°C hysteresis. Upon thermal warning, the ERR pin asserts low; at shutdown, all regulators disable and RESET_ outputs go low. Recovery requires junction temperature to fall below +155°C before automatic restart. MAX16993ATJH+ also includes per-channel overcurrent limiting using CS1/OUT1 sensing and short-circuit protection with hiccup mode for sustained faults - ensuring safe operation under sustained overload.
MAX16993ATJH+ 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 (3.3V, 5.2V)
- 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)
MAX16993ATJH+ FAQ
1.How can I place an order for MAX16993ATJH+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJH+ 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 MAX16993ATJH+ reliable?
The price and inventory of MAX16993ATJH+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16993ATJH+ is usually 5 days.
3.What payment methods are accepted for MAX16993ATJH+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJH+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJH+?
MAX16993ATJH+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJH+ 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 MAX16993ATJH+?
For technical support, including MAX16993ATJH+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJH+ requirements.
6.How does Aetrix verify that MAX16993ATJH+ is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJH+ 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 MAX16993ATJH+ meets industry standards.
7.What is the process for return or replacement of MAX16993ATJH+?
All MAX16993ATJH+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJH+, 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 MAX16993ATJH+ part is unused and in its original packaging.
Return procedure for MAX16993ATJH+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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