My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16993ATJB+
- Part No.:
- MAX16993ATJB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16993ATJB+.pdf
- Description:
- IC REG BUCK ADJ 3A TRPL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,981
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX16993ATJB+ 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 operation from −40°C to +125°C - enabling compact, efficient power rails for ADAS camera modules, infotainment head units, and domain controllers.
For engineers reviewing the MAX16993ATJB+ datasheet, MAX16993ATJB+ pinout, MAX16993ATJB+ application, or MAX16993ATJB+ equivalent, key selection considerations include its cascaded dual-buck architecture, pin-selectable 2.1MHz switching frequency, individual enable/reset per channel, spread-spectrum EMI reduction, and side-wettable QFND-EP package for automated optical inspection in automotive production.
Technical Context
The MAX16993ATJB+ 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 frequency (2.1MHz or factory-trimmed 350kHz–1.05MHz), while OUT2/OUT3 operate fixed at 2.1MHz and are powered directly from OUT1's output - improving system efficiency by eliminating intermediate LDO losses.
Each channel features independent enable inputs (EN1/EN2/EN3), open-drain reset outputs (RESET1/RESET2/RESET3) with programmable timeout (0.1ms–7.8ms), overtemperature shutdown (+170°C), short-circuit protection via current-sense resistors (CS1/OUT1), and integrated high- and low-side MOSFET drivers with <4Ω on-resistance - supporting robust, self-contained DC-DC regulation without external gate drivers.
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 small 1µH inductors. |
| 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 stable microcontroller core voltage under full line/load/temperature variation. |
| Thermal Rating | AEC-Q100 Grade 0 (−40°C to +125°C junction); thermal shutdown at +170°C with 15°C hysteresis - certified for under-hood deployment. |
| Package | 32-pin side-wettable QFND-EP (5mm × 5mm × 0.8mm); exposed pad improves thermal dissipation to PCB - supports AOI-compatible reflow and >2W power handling. |
| Protection Features | Overcurrent (via CS1/OUT1 sensing), overtemperature, undervoltage lockout (PV threshold = 2.7V), and output overvoltage - reduces need for external fault management circuitry. |
Pinout & Package
The MAX16993ATJB+ is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad connected to GND. This package supports automated optical inspection and provides low θJA = 37°C/W for reliable operation in high-temperature automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP | Main HV input supply | Accepts 3.5V–36V battery rail; includes 42V transient protection - primary power entry point for entire PMIC. |
| EN1 / EN2 / EN3 | Independent enable inputs | Active-high digital controls; EN1 enables OUT1 and powers internal bias rail - enables sequenced startup of cascaded regulators. |
| OUT1 / OUT2 / OUT3 | Output voltage sense inputs | Connect to respective output nodes for feedback regulation; OUT1 also serves as current-sense return - enables precise closed-loop control without external dividers in fixed-VOUT mode. |
| RESET1 / RESET2 / RESET3 | Open-drain reset outputs | Assert low when corresponding output drops >6% below nominal; timeout programmable (0.1–7.8ms) - provides system-level power-good signaling to MCU or FPGA. |
| CSEL1 / SSEN / SYNC | Configuration & synchronization I/O | CSEL1 selects 2.1MHz vs. factory-divided frequency; SSEN enables spread-spectrum EMI reduction; SYNC accepts external clock (1.7–2.4MHz) for system-wide timing alignment. |
Key Features
| Feature | Design Value |
|---|---|
| Cascaded dual-buck architecture | OUT2/OUT3 powered directly from OUT1 output - eliminates intermediate LDO losses and reduces total solution size by ~30% vs. discrete buck + LDO approach. |
| Side-wettable QFND-EP package | Enables automated optical inspection of solder joints - critical for zero-defect automotive manufacturing and long-term reliability validation. |
| Individual soft-start timers | 4ms for OUT1, 2.5ms for OUT2/OUT3 - prevents inrush current overload during cold-cranking and ensures controlled power-up sequencing. |
| Spread-spectrum enable (SSEN) | Reduces peak radiated emissions by spreading oscillator energy over ±6% bandwidth - helps meet CISPR-25 Class 5 EMI limits without added shielding or filtering. |
| Factory-trimmed fixed outputs | OUT1 options: 3.3V, 5.0V, 3.15V; OUT2/OUT3 options: 3.15V, 1.8V, 1.2V - achieves ±3% accuracy over temperature without precision external resistors. |
Applications
| ADAS Camera Module Power | Infotainment Head Unit |
|---|---|
Use Scenario: Dual-sensor front-facing camera with ISP, SoC, and image sensor requiring isolated, low-noise 1.2V, 1.8V, and 3.3V rails. IC Role / Device Role / Timing Role: Primary PMIC delivering sequenced, regulated voltages; OUT1 powers OUT2/OUT3; RESET outputs coordinate SoC boot with sensor initialization. Use Value: 2.1MHz switching avoids AM-band noise coupling into analog video signals; side-wettable package ensures solder joint reliability in vibration-prone mounting locations. | Use Scenario: 10-inch touchscreen display unit with ARM-based application processor, audio codec, and backlight LED driver. IC Role / Device Role / Timing Role: Central power manager supplying core (1.1V), I/O (3.3V), and display bias (5.0V) rails; EN inputs support sleep/wake state transitions. Use Value: 30µA quiescent current extends battery backup time during vehicle ignition-off; spread-spectrum mode suppresses switching noise in sensitive audio paths. |
| Automotive Domain Controller | Body Control Module (BCM) |
Use Scenario: Zonal gateway controller consolidating CAN FD, Ethernet, and LIN interfaces with multi-core MCU and security enclave. IC Role / Device Role / Timing Role: High-integration PMIC generating 1.0V (core), 1.8V (memory), and 3.3V (peripheral) from 12V battery; SYNC input aligns switching with Ethernet PHY clock. Use Value: Cascaded architecture minimizes heat generation vs. parallel bucks; individual RESET outputs provide per-rail power-good status to safety monitor logic. | Use Scenario: Under-hood BCM managing lighting, wipers, and door locks with extended temperature operation requirement. IC Role / Device Role / Timing Role: Robust power source for 8-bit/32-bit MCUs and discrete drivers; OUT1 supplies 5.0V for logic, OUT2/OUT3 deliver 3.3V/1.2V for sensors and communication ICs. Use Value: AEC-Q100 Grade 0 rating and 42V transient tolerance ensure uninterrupted operation during load dump; thermal shutdown protects against engine bay overheating. |
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/VY+ | 3-channel buck with integrated FETs; fixed 2.2MHz frequency; no pin-selectable frequency option; lower max input (28V vs. 36V). | Targeted at lower-voltage 24V commercial vehicles; lacks 42V load-dump protection required for 12V passenger cars. | Select MAX20096ATPA/VY+ only for non-automotive industrial applications where 28V input suffices and fixed 2.2MHz simplifies EMI tuning. |
| TPS653221AQPWPRQ1 | 3-channel buck with integrated FETs; 2.1MHz fixed frequency; includes watchdog timer and SPI interface; higher quiescent current (45µA vs. 30µA). | Designed for functional-safety ASIL-B systems; adds diagnostics not present in MAX16993ATJB+ - increases software overhead but enables ISO 26262 compliance. | Choose TPS653221AQPWPRQ1 when functional safety certification is mandatory; otherwise MAX16993ATJB+ offers better efficiency and simpler integration. |
Compared with MAX20096ATPA/VY+ and TPS653221AQPWPRQ1, the MAX16993ATJB+ uniquely balances automotive ruggedness (42V transient tolerance, AEC-Q100 Grade 0), ultra-low quiescent current, and flexible frequency configuration - making it optimal for cost-sensitive, high-volume ADAS and infotainment designs where diagnostic complexity is unnecessary.
Availability
The MAX16993ATJB+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and domain controllers requiring stable component supply, AEC-Q100 qualification, and side-wettable package compatibility with automated optical inspection.
Supply support for MAX16993ATJB+ 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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets - emphasizing reliability, integration, and power efficiency.
The MAX16993ATJB+ belongs to Maxim's automotive PMIC product line, engineered specifically for compact, high-efficiency multirail power delivery in space-constrained, thermally demanding automotive ECUs - with emphasis on EMI control, startup sequencing, and AEC-Q100 compliance.
FAQ
What is the maximum input voltage the MAX16993ATJB+ can withstand during automotive load-dump events?
The MAX16993ATJB+ is protected against load-dump transients up to 42V, as specified in its Absolute Maximum Ratings. This exceeds the ISO 7637-2 Pulse 5a requirement (35V for 12V systems), ensuring robust operation during alternator disconnection events without external TVS clamping - a critical feature for under-hood automotive applications where the MAX16993ATJB+ is deployed.
Does the MAX16993ATJB+ support independent voltage sequencing between its three output channels?
Yes, the MAX16993ATJB+ supports fully independent sequencing via separate enable inputs (EN1, EN2, EN3) and individual reset outputs (RESET1, RESET2, RESET3). EN1 must be asserted first to power up OUT1; only after OUT1 completes its 4ms soft-start can EN2/EN3 be asserted to initiate 2.5ms soft-start on OUT2/OUT3 - enabling precise, configurable power-up order essential for complex SoCs and FPGAs.
Can the MAX16993ATJB+ operate with all three buck channels enabled simultaneously at full load?
Yes, the MAX16993ATJB+ is designed for simultaneous full-load operation: OUT1 delivers up to 3.75A, while OUT2 and OUT3 each support up to 3.0A (depending on factory option). Thermal performance is validated with θJA = 37°C/W in the side-wettable QFND-EP package, and the device includes overtemperature shutdown at +170°C - allowing sustained triple-channel operation in automotive ambient temperatures up to +105°C with proper PCB copper area.
How does the spread-spectrum function (SSEN) affect electromagnetic emissions of the MAX16993ATJB+?
When SSEN is pulled high to BIAS, the MAX16993ATJB+ modulates its internal oscillator frequency between fSW and fSW + 6% at 4kHz, spreading spectral energy and reducing peak radiated emissions by up to 10dBµV in narrowband measurements. This feature is especially effective for meeting CISPR-25 Class 5 limits in infotainment and ADAS systems - and can be enabled dynamically during EMI testing without hardware changes to the MAX16993ATJB+ design.
Is the MAX16993ATJB+ pin-compatible with other devices in the MAX1699x family?
No, the MAX16993ATJB+ 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, CSEL1 on MAX16993ATJB+ controls OUT1 frequency, whereas on MAX16992 it configures different protection thresholds. Direct replacement requires full schematic and layout review; always verify pin mapping using the official MAX16993ATJB+ datasheet before substitution.
MAX16993ATJB+ 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)
MAX16993ATJB+ FAQ
1.How can I place an order for MAX16993ATJB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16993ATJB+ 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 MAX16993ATJB+ reliable?
The price and inventory of MAX16993ATJB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16993ATJB+ is usually 5 days.
3.What payment methods are accepted for MAX16993ATJB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16993ATJB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16993ATJB+?
MAX16993ATJB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16993ATJB+ 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 MAX16993ATJB+?
For technical support, including MAX16993ATJB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16993ATJB+ requirements.
6.How does Aetrix verify that MAX16993ATJB+ is sourced from the original manufacturer or authorized distributors?
All MAX16993ATJB+ 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 MAX16993ATJB+ meets industry standards.
7.What is the process for return or replacement of MAX16993ATJB+?
All MAX16993ATJB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16993ATJB+, 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 MAX16993ATJB+ part is unused and in its original packaging.
Return procedure for MAX16993ATJB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16993ATJB+ 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…
