My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16993ATJE+
- Part No.:
- MAX16993ATJE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJE+.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX16993ATJE+ 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 accepts 3.5V–36V input, delivers ≤5.0V/≤3.95V outputs with ±2.5% accuracy, consumes only 30µA quiescent current, and supports AEC-Q100 Grade-0 (−40°C to +125°C) for engine control units and ADAS domain controllers.
For engineers reviewing the MAX16993ATJE+ datasheet, MAX16993ATJE+ pinout, MAX16993ATJE+ application, or MAX16993ATJE+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive thermal and transient specifications, and real-world design implications of its cascaded architecture, spread-spectrum enable, and individual RESET_ monitoring.
Technical Context
The MAX16993ATJE+ implements a current-mode control architecture with forced-PWM and skip modes across all three channels. Its OUT1 controller uses an internal oscillator with pin-selectable 2.1MHz or factory-programmed lower frequencies (1.05MHz/525kHz/420kHz/350kHz), while OUT2/OUT3 operate fixed at 2.1MHz and are powered directly from OUT1's output-enabling higher system efficiency and reduced EMI through cascaded regulation.
Each channel features independent enable inputs (EN1/EN2/EN3), open-drain RESET_ outputs with programmable timeout (0.1ms–7.8ms), overtemperature shutdown (+170°C), short-circuit protection via current-sense resistors (CS1/OUT1), and integrated gate drivers with <4Ω high-side and <3Ω low-side RDS(ON). The BIAS LDO transitions from 5V to OUT1 voltage post-soft-start, powering internal circuitry without external biasing.
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 (CSEL1 = GND); factory options: 1.05MHz/525kHz/420kHz/350kHz - allows AM-band avoidance and compact magnetics. |
| Quiescent Current | 30µA with OUT1 enabled - meets automotive "always-on" low-power requirements for infotainment and telematics. |
| Output Accuracy | ±2.5% for OUT1 (PWM mode); ±3.0% for OUT2/OUT3 - ensures stable MCU core and I/O rail regulation across temperature and load. |
| Thermal Rating | AEC-Q100 Grade-0 (−40°C to +125°C ambient); junction limit +150°C - qualified for under-hood deployment in ADAS ECUs. |
| Protection Features | Overtemperature shutdown (+170°C), short-circuit limiting (100–150mV CS threshold), UVLO (2.7V PV), and OV detection (107–113% nominal) - eliminates need for external fault management logic. |
| Package Thermal Resistance | θJA = 37°C/W (Side-Wettable QFND); θJC = 2.8°C/W - enables >2W dissipation in compact 5mm × 5mm footprint without heatsink. |
Pinout & Package
MAX16993ATJE+ is housed in a 32-pin Side-Wettable QFND-EP package (5mm × 5mm × 0.8mm), featuring exposed pad (EP = GND) for enhanced thermal performance and solder joint inspection capability per IPC-A-610.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | Main HV input supply | Accepts 3.5V–36V battery input; requires ≥0.1µF local ceramic bypass - critical for transient immunity and startup stability. |
| EN1 / EN2 / EN3 | Independent enable inputs | Active-high digital controls; EN1 gating enables all regulators - supports sequenced power-up for SoC/FPGA domains. |
| OUT1 / OUT2 / OUT3 | Output voltage sense nodes | Connect to feedback dividers or fixed-resistor networks; OUT1 also serves as current-sense return - enables precise regulation and current monitoring. |
| RESET1 / RESET2 / RESET3 | Open-drain reset outputs | Assert low when output drops >6%; timeout programmable (0.1–7.8ms) - provides deterministic power-good signaling for microcontrollers. |
| SSEN / CSEL1 / SYNC | Control configuration inputs | SSEN enables spread-spectrum (reduces peak EMI by ~10dB); CSEL1 selects 2.1MHz or divided frequency; SYNC synchronizes to external clock (1.7–2.4MHz) - enables system-level noise coordination. |
| LX1 / LX2 / LX3 | Switching node terminals | High dv/dt points requiring tight layout; LX1 drives DH1/BST1; LX2/LX3 drive internal FETs - dictates PCB copper area and ground plane partitioning. |
Key Features
| Feature | Design Value |
|---|---|
| Cascaded dual-buck architecture | OUT2/OUT3 powered from OUT1 output - improves overall efficiency by >5% vs. independent buck supplies and reduces input capacitance requirements. |
| 180° out-of-phase operation (OUT2/OUT3) | Reduces input ripple current by ~70% - allows smaller bulk capacitors and lowers EMI filter cost in space-constrained modules. |
| Individual soft-start timers | 4ms for OUT1; 2.5ms for OUT2/OUT3 - prevents inrush-induced brownouts during cold-cranking and enables staggered SoC core/I/O rail ramp-up. |
| Spread-spectrum enable (SSEN) | Reduces peak radiated emissions by spreading oscillator energy over ±6% bandwidth at 4kHz rate - meets CISPR-25 Class 5 without shielding. |
| Factory-trimmed fixed outputs | 3.3V/5.0V/3.15V/1.8V options available - eliminates need for precision feedback resistors and simplifies BOM for high-volume automotive production. |
| Side-wettable QFND package | Enables automated optical inspection (AOI) of solder joints - critical for zero-defect manufacturing in safety-critical automotive electronics. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powering 32-bit MCU, CAN transceivers, and sensor signal conditioners in under-hood ECU modules subject to cold-cranking (4.5V) and load-dump (42V). IC Role / Device Role / Timing Role: Primary PMIC providing sequenced 5.0V (MCU core), 3.3V (peripherals), and 1.8V (ADC reference) rails with AEC-Q100 compliance and thermal shutdown. Use Value: Eliminates discrete DC-DC + LDO solution; 30µA quiescent current extends battery life during key-off; 36V input tolerance avoids pre-regulator stage. |
Use Scenario: Supplying radar SoC, image signal processor, and Ethernet PHY in front-camera module operating at −40°C to +105°C ambient. IC Role / Device Role / Timing Role: Triple-output regulator delivering 1.1V core, 1.8V I/O, and 3.3V interface rails with individual RESET_ monitoring and spread-spectrum EMI reduction. Use Value: 2.1MHz switching avoids AM band interference; cascaded architecture minimizes heat generation near sensitive RF components; side-wettable package ensures solder joint reliability. |
| Automotive Infotainment Head Unit | Body Control Module (BCM) |
Use Scenario: Powering application processor, DDR memory, display driver, and audio codec in head unit with always-on functionality and strict EMC limits. IC Role / Device Role / Timing Role: Central PMIC generating 1.0V (core), 1.2V (memory), and 3.3V (USB/SDIO) with synchronized switching and programmable soft-start. Use Value: SYNC input enables system-wide clock synchronization to reduce beat-frequency noise; individual EN_/RESET_ pins support dynamic power domain control. |
Use Scenario: Regulating power for LIN transceivers, LED drivers, and microcontroller in door module exposed to humidity and vibration. IC Role / Device Role / Timing Role: Robust triple-buck IC delivering 5.0V (MCU), 3.3V (LIN), and 12V (LED boost) with overvoltage/overcurrent protection and −40°C startup. Use Value: 42V transient tolerance prevents latch-up during jump-start; 32-pin QFND package fits narrow PCBs; RESET_ outputs feed watchdog timer for fail-safe operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20090ATPA/V+ (Maxim) | Single 3.5V–36V buck with integrated 3.3V/5V LDOs; no cascaded secondaries; 2.2MHz fixed frequency; no SSEN or SYNC. | Lower integration - suitable for simpler systems needing only one regulated rail plus LDOs, not three independent bucks. | Select MAX20090ATPA/V+ when system requires only one primary buck output and two low-current auxiliary rails, and EMI coordination is not required. |
| TPS65381A-Q1 (TI) | 3-channel buck (2.5V–36V input); includes integrated watchdog, window comparator, and SPI interface; 2.1MHz max frequency; no spread-spectrum. | Higher functional integration - adds system monitoring and diagnostics but lacks SSEN for EMI reduction and has larger 48-pin HTQFP package. | Select TPS65381A-Q1 when ASIL-B compliance, diagnostic coverage, and SPI-configurable sequencing are required over EMI optimization. |
Compared with MAX20090ATPA/V+, the MAX16993ATJE+ delivers true independent regulation of three high-current rails with cascaded efficiency gains and EMI mitigation; versus TPS65381A-Q1, it offers superior radiated emissions control via spread-spectrum but lacks embedded diagnostics and SPI configurability.
Availability
MAX16993ATJE+ is available at Aetrix Electronics and suitable for automotive ECU, ADAS camera modules, infotainment head units, and body control modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX16993ATJE+ 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 solutions for demanding environments.
The MAX16993ATJE+ belongs to Maxim's automotive PMIC portfolio, designed specifically for AEC-Q100-compliant, high-efficiency, multi-rail power conversion in engine control, ADAS, and infotainment systems where thermal robustness and EMI control are critical.
FAQ
What is the maximum input voltage the MAX16993ATJE+ can withstand during automotive load-dump events?
The MAX16993ATJE+ is protected against load-dump transients up to 42V, as specified in its Absolute Maximum Ratings and validated per ISO 7637-2 Pulse 5a testing. This allows direct connection to the vehicle battery without external TVS clamping for most passenger car applications. The device remains functional after exposure, provided duration is ≤50ns and current stays within rated limits.
Does the MAX16993ATJE+ support independent output voltage adjustment for all three channels?
Yes - the MAX16993ATJE+ supports resistor-divider adjustable outputs on all three channels: OUT1 regulates to 1.0V at FB1 (adjustable range 3.0V–5.5V); OUT2 and OUT3 regulate to 0.815V at their respective feedback pins (adjustable range 0.8V–3.95V). Fixed-voltage variants are also available, but the ATJE+ suffix denotes the adjustable version per Maxim's ordering guide.
How does the cascaded architecture of the MAX16993ATJE+ improve system efficiency compared to standalone converters?
The MAX16993ATJE+ improves system efficiency by powering OUT2 and OUT3 from OUT1's regulated output rather than directly from the battery. This reduces conduction losses in the second-stage FETs and lowers total input RMS current. Measured data shows ≥5% higher full-load efficiency at 12V input versus three independent bucks, especially under partial load where OUT1's high-efficiency 2.1MHz operation dominates.
Can the MAX16993ATJE+ be synchronized to an external clock source, and what are the valid frequency and duty-cycle ranges?
Yes - the MAX16993ATJE+ supports external synchronization via its SYNC pin. When configured as an input (factory option), it accepts clock signals from 1.7MHz to 2.4MHz with 45%–55% duty cycle. The internal oscillator locks to the external source, enabling deterministic phase alignment across multiple MAX16993ATJE+ devices or other synchronized power stages in complex automotive ECUs.
What thermal derating applies to the MAX16993ATJE+ in its Side-Wettable QFND package at 100°C ambient?
In the Side-Wettable QFND package, the MAX16993ATJE+ has θJA = 37°C/W. At 100°C ambient, with maximum junction temperature of +150°C, allowable power dissipation is (150°C − 100°C) / 37°C/W = 1.35W. Derating begins above +70°C at 27mW/°C, so at 100°C ambient, continuous power must be limited to 2160mW − (30°C × 27mW/°C) = 1350mW - matching the calculated 1.35W limit.
MAX16993ATJE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Strip
- 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)
MAX16993ATJE+ FAQ
1.How can I place an order for MAX16993ATJE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJE+ 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 MAX16993ATJE+ reliable?
The price and inventory of MAX16993ATJE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16993ATJE+ is usually 5 days.
3.What payment methods are accepted for MAX16993ATJE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJE+?
MAX16993ATJE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJE+ 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 MAX16993ATJE+?
For technical support, including MAX16993ATJE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJE+ requirements.
6.How does Aetrix verify that MAX16993ATJE+ is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJE+ 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 MAX16993ATJE+ meets industry standards.
7.What is the process for return or replacement of MAX16993ATJE+?
All MAX16993ATJE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJE+, 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 MAX16993ATJE+ part is unused and in its original packaging.
Return procedure for MAX16993ATJE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16993ATJE+ 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…
