My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16993ATJI+T
- Part No.:
- MAX16993ATJI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJI+T.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,102
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX16993ATJI+T 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% accuracy, consumes only 30µA quiescent current, and supports load-dump transients up to 42V - enabling compact, robust power rails for ADAS camera modules and infotainment head units.
For engineers reviewing the MAX16993ATJI+T datasheet, MAX16993ATJI+T pinout, MAX16993ATJI+T application, or MAX16993ATJI+T equivalent, key selection criteria include its 32-pin side-wettable QFND-EP package, cascaded OUT2/OUT3 architecture for improved efficiency, individual enable/reset per channel, spread-spectrum and SYNC capability for EMI control, and -40°C to +125°C operation with AEC-Q100 qualification.
Technical Context
The MAX16993ATJI+T implements a current-mode control architecture with forced-PWM and skip modes, supporting frequency synchronization across all three channels via the SYNC input (1.7–2.4MHz range). Its OUT1 controller uses external high-side/low-side MOSFETs and integrates gate drivers (DH1/DL1), while OUT2/OUT3 integrate 3A FETs and operate from OUT1's output voltage.
It features independent soft-start (4ms for OUT1, 2.5ms for OUT2/OUT3), individual open-drain RESET_ outputs with programmable timeout (0.1–7.8ms), overtemperature shutdown (+170°C), short-circuit protection, and BIAS LDO that transitions from 5V to OUT1 voltage post-soft-start - ensuring safe, sequenced power-up in automotive systems requiring ASIL-B awareness.
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 | Pin-selectable 2.1MHz or factory-set 1.05/0.525/0.42/0.35MHz - 2.1MHz avoids AM band interference and reduces inductor size. |
| Quiescent Current | 30µA with OUT1 enabled - meets automotive "always-on" low-power requirements for telematics and body control modules. |
| Output Accuracy | ±2.5% for OUT1 (PWM mode), ±3.0% for OUT2/OUT3 - ensures reliable microcontroller and sensor rail regulation across temperature. |
| Thermal Rating | AEC-Q100 Grade 0 (−40°C to +125°C ambient), junction limit +150°C - validated for under-hood and dashboard mounting. |
| Protection Features | Overtemperature shutdown (+170°C), overcurrent limiting (100–150mV CS threshold), UVLO (2.7V PV threshold), and individual reset assertion on 6% undervoltage - enables fail-safe system behavior. |
| Package | 32-pin side-wettable QFND-EP (5mm × 5mm × 0.8mm); exposed pad tied to GND - supports automated optical inspection (AOI) and improves thermal dissipation (θJA = 37°C/W). |
Pinout & Package
The MAX16993ATJI+T is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad connected to GND. This package enables solder-joint inspection and enhances thermal performance in high-power-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP (Pin 7) | Main HV input supply | Accepts 3.5V–36V battery input; requires local 0.1µF ceramic bypass - primary path for load-dump energy absorption. |
| EN1 (Pin 8) | High-voltage enable for OUT1 | Active-high digital input tolerant to 45V; initiates full power-up sequence when asserted - controls system-level power sequencing. |
| OUT1 (Pin 13) | OUT1 output sense & current-sense return | Connects to output capacitor and current-sense resistor negative terminal - enables accurate voltage regulation and cycle-by-cycle current limiting. |
| FB1 (Pin 11) | OUT1 feedback input | Regulates to 1.0V (typ) in adjustable mode; tied to BIAS or GND for factory-fixed 3.3V/5.0V options - determines final output voltage with <±0.5% reference tolerance. |
| RESET1–3 (Pins 28,24,17) | Open-drain reset outputs | Assert low when respective output falls >6% below nominal; timeout programmable (0.1–7.8ms) - provides sequenced, fault-isolated power-good signaling to MCU. |
| SYNC (Pin 32) | Frequency synchronization I/O | Configurable as input (1.7–2.4MHz external clock) or logic-controlled PWM/skip mode selector - enables deterministic noise reduction in multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Cascaded OUT2/OUT3 architecture | Derives PV2/PV3 directly from OUT1, improving overall system efficiency by eliminating intermediate conversion losses - critical for thermally constrained ECUs. |
| Spread-spectrum enable (SSEN) | Reduces peak radiated EMI by modulating switching frequency ±3% at 4kHz sawtooth rate - enables faster EMC compliance without added filtering components. |
| Individual 3A integrated FETs for OUT2/OUT3 | Eliminates need for external power MOSFETs and associated gate-drive circuitry - reduces BOM count and layout complexity for dual-core SoC supplies. |
| 180° out-of-phase operation of OUT2/OUT3 | Halves input ripple current on shared OUT1 output capacitor - allows smaller, lower-cost bulk capacitance and extends capacitor lifetime. |
| Factory-programmable CSEL1 clock division | Selects 2.1MHz (CSEL1=GND) or divides OUT1 frequency by 2/4/5/6 (CSEL1=BIAS) - enables optimization between efficiency, EMI, and component size for specific vehicle platforms. |
Applications
| ADAS Camera Module Power | Infotainment Head Unit |
|---|---|
Use Scenario: Powers image sensor, ISP, and interface ICs in rear-view or surround-view cameras mounted in vehicle exterior locations. IC Role / Device Role / Timing Role: Provides isolated, sequenced 5.0V (OUT1), 3.3V (OUT2), and 1.8V (OUT3) rails with independent reset signaling and thermal monitoring. Use Value: Enables single-chip solution meeting ISO 26262 ASIL-B power integrity requirements while surviving 42V load-dump events and −40°C cold cranking. | Use Scenario: Supplies processor cores, DDR memory, display driver, and audio codec in central infotainment units with strict EMI limits. IC Role / Device Role / Timing Role: Delivers tightly regulated, low-noise 3.3V and 1.2V rails using spread-spectrum and SYNC to minimize conducted/radiated emissions near FM/AM antennas. Use Value: Reduces need for ferrite beads and shielding cans, lowering system cost and board area while passing CISPR-25 Class 5 radiated emissions testing. |
| Body Control Module (BCM) | Digital Cluster Instrument Panel |
Use Scenario: Manages power for LIN gateway, LED drivers, and sensor interfaces in door modules and junction boxes. IC Role / Device Role / Timing Role: Provides always-on 3.3V rail (OUT2) and switched 5.0V rail (OUT1) with ultra-low 30µA quiescent current and wake-up via EN1. Use Value: Meets OEM sleep-current budgets (<100µA total) for extended parking mode without compromising startup responsiveness. | Use Scenario: Powers high-resolution TFT-LCD, graphics controller, and touch controller in driver-facing digital instrument clusters. IC Role / Device Role / Timing Role: Generates 3.3V (OUT2) and 1.1V (OUT3) with precise soft-start timing (4ms/2.5ms) to prevent display flicker during ignition-on transition. Use Value: Ensures glitch-free boot sequence and eliminates visual artifacts during cold start, satisfying OEM human-machine interface (HMI) quality standards. |
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 |
|---|---|---|---|
| MAX20096ATGB/V+ | Single 3.5V–36V buck controller with integrated 3A FET; no cascaded secondary converters - requires external regulators for multiple rails. | Lacks integrated OUT2/OUT3; suitable only when secondary rails are generated externally or not required. | Choose when system needs only one high-voltage rail and space permits discrete secondary regulation. |
| TPS650361QRGZTQ1 | Three-channel PMIC with 2.2MHz buck controllers, but OUT1 max input 6.5V - requires external pre-regulator for direct battery connection. | Not rated for direct 12V/24V battery input; limited to post-processed supplies - unsuitable for front-end power conversion. | Choose only if system already includes a 5V intermediate bus and requires higher integration of LDOs and supervisors. |
Compared with MAX20096ATGB/V+ and TPS650361QRGZTQ1, the MAX16993ATJI+T uniquely combines direct battery-input capability, integrated dual low-voltage converters, and AEC-Q100 Grade 0 rating in a single 5mm × 5mm package - making it optimal for space-constrained, high-reliability automotive front-end power designs.
Availability
MAX16993ATJI+T 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 MAX16993ATJI+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets.
The MAX16993ATJI+T belongs to Maxim's automotive-grade PMIC product line, designed specifically to replace discrete DC-DC solutions in safety-critical vehicle subsystems where reliability, EMI robustness, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum input voltage the MAX16993ATJI+T can withstand during automotive load-dump events?
The MAX16993ATJI+T is protected against load-dump transients up to 42V on the VSUP pin, as specified in its Absolute Maximum Ratings and validated per ISO 7637-2 Pulse 5a. This allows direct connection to 12V or 24V vehicle batteries without external TVS clamping in most OEM architectures. The device remains functional and undamaged during these transient events, ensuring robust operation in real-world automotive environments. MAX16993ATJI+T's internal protection circuitry automatically recovers after the transient subsides.
Does the MAX16993ATJI+T support independent power sequencing for its three output channels?
Yes, the MAX16993ATJI+T supports fully independent power sequencing via dedicated enable inputs (EN1, EN2, EN3) and individual open-drain reset outputs (RESET1, RESET2, RESET3). EN1 must be asserted first to initiate OUT1 soft-start (4ms); only then can EN2/EN3 be enabled to ramp OUT2/OUT3 (2.5ms each). Each RESET_ asserts low until its respective output reaches regulation and holds for a programmable timeout (0.1–7.8ms), enabling precise, fault-aware sequencing in microcontroller-based systems. This behavior is inherent to MAX16993ATJI+T's architecture and requires no external logic.
Can the MAX16993ATJI+T operate in forced-PWM mode across all three channels simultaneously?
Yes, the MAX16993ATJI+T supports forced-PWM mode on all three channels when the SYNC pin is driven high (≥1.8V), overriding skip mode under light loads. In this configuration, OUT1, OUT2, and OUT3 maintain constant 2.1MHz (or selected factory frequency) switching regardless of load, ensuring predictable EMI spectrum and eliminating audible noise. The SYNC input accepts external clocks from 1.7MHz to 2.4MHz with 50% duty cycle, allowing full system-level synchronization. This capability is natively supported by MAX16993ATJI+T without firmware or additional components.
What is the purpose of the BIAS pin on the MAX16993ATJI+T, and how does it behave during startup?
The BIAS pin on the MAX16993ATJI+T is a 5V internal LDO output that powers internal circuitry and the OUT1 low-side gate driver (PV1). At startup, BIAS regulates to 5.0V (±0.4V) from VSUP. Once OUT1 completes its 4ms soft-start and reaches regulation, the BIAS LDO shuts down and the pin is internally shorted to OUT1 - so if OUT1 is set to 3.3V, BIAS transitions from 5.0V to 3.3V. This dynamic behavior minimizes power loss and ensures consistent gate-drive voltage. MAX16993ATJI+T requires a ≥2.2µF ceramic capacitor from BIAS to GND for stability.
Is the MAX16993ATJI+T pin-compatible with other devices in the MAX1699x family?
No, the MAX16993ATJI+T is not pin-compatible with other MAX1699x variants such as MAX16992 or MAX16994. While sharing the same 32-pin side-wettable QFND-EP package footprint, pin functions differ significantly - for example, MAX16992 lacks OUT3 and has different RESET/ERR assignments, and MAX16994 uses alternate FB/EN configurations. Substituting without schematic and layout review will cause functional failure. MAX16993ATJI+T's pinout is unique to its triple-buck architecture and must be used with its designated reference design. Always verify against the MAX16993ATJI+T-specific pin description table.
MAX16993ATJI+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:
- 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
- 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)
MAX16993ATJI+T FAQ
1.How can I place an order for MAX16993ATJI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJI+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 MAX16993ATJI+T reliable?
The price and inventory of MAX16993ATJI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16993ATJI+T is usually 5 days.
3.What payment methods are accepted for MAX16993ATJI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJI+T?
MAX16993ATJI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJI+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 MAX16993ATJI+T?
For technical support, including MAX16993ATJI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJI+T requirements.
6.How does Aetrix verify that MAX16993ATJI+T is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJI+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 MAX16993ATJI+T meets industry standards.
7.What is the process for return or replacement of MAX16993ATJI+T?
All MAX16993ATJI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJI+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 MAX16993ATJI+T part is unused and in its original packaging.
Return procedure for MAX16993ATJI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16993ATJI+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
