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Analog Devices Inc. LTC3372HUK#TRPBF
- Part No.:
- LTC3372HUK#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3372HUK#TRPBF.pdf
- Description:
- 60V LOW IQ BUCK CONTROLLER PLUS
- Quantity:
- Payment:
- Shipping:
Inventory:3,777
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Product details
Overview
LTC3372HUK#TRPBF from Analog Devices is a high-voltage buck controller plus four configurable low-voltage synchronous buck regulators in a single 48-pin QFN package. It delivers up to 60V input handling, 8A total LV output current across eight 1A integrated power stages, and supports eight distinct output configurations (e.g., 4×2A, 1×4A+2×2A). It enables compact multi-rail power for automotive infotainment domain controllers requiring precise sequencing and ultra-low quiescent current.
For engineers reviewing the LTC3372HUK#TRPBF datasheet, LTC3372HUK#TRPBF pinout, LTC3372HUK#TRPBF application, or LTC3372HUK#TRPBF equivalent, key selection criteria include its –40°C to 150°C operating junction temperature rating, programmable LV channel configuration via C1–C3 pins, independent VINA–H inputs per regulator, and integrated die temperature monitoring with ±7 mV/°C slope accuracy.
Technical Context
The LTC3372HUK#TRPBF integrates two functionally distinct power domains: a high-voltage (HV) synchronous buck controller (4.5V–60V input, 3.3V/5V outputs) with external N-channel FET drive capability, and four low-voltage (LV) synchronous buck regulators sharing eight internal 1A power stages. The HV controller operates at 1/6 the LV switching frequency (e.g., 333 kHz HV when LV runs at 2 MHz), enabling optimized EMI separation.
LV regulator configuration is determined by logic states on C1–C3 pins, selecting one of eight fixed current allocations (e.g., 000 = 2A/2A/2A/2A; 111 = 4A/–/–/4A). Each LV channel accepts independent 2.25V–5.5V inputs (VINA–H), allowing flexible sourcing from the HV output or auxiliary supplies, while maintaining individual enable, feedback, and soft-start control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| HV Input Range | 4.5V to 60V - supports wide automotive battery transients and industrial 48V systems without pre-regulation. |
| HV Output Voltage | 3.3V or 5.0V (programmed via VOUTPRG pin) - tight regulation (±1.5% over temp) for MCU core or interface rails. |
| LV Total Output Current | Up to 8A - distributed across four channels using eight integrated 1A power stages, configurable per application load profile. |
| No-Load IQ (HV only) | 23µA @ 3.3VOUT - enables always-on operation in automotive body electronics with minimal standby drain. |
| Operating Junction Temp | –40°C to 150°C - qualified for under-hood automotive applications and high-ambient industrial environments. |
| Switching Frequency (LV) | 1MHz to 3MHz (programmable via RT resistor) - allows optimization of size vs. efficiency for space-constrained designs. |
| Package | 48-pin 7mm × 7mm QFN with exposed thermal pad - provides low θJA (34°C/W) for high-power density thermal management. |
Pinout & Package
The LTC3372HUK#TRPBF is housed in a thermally enhanced 48-pin plastic QFN (7mm × 7mm) with exposed GND pad (Pin 49), requiring PCB soldering for thermal and electrical integrity. Pin functions are validated per Analog Devices' Rev. A datasheet (pp.14–16).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | HV input supply | Accepts 4.5V–60V; powers HV controller and INTVCC regulator; must be decoupled near pin. |
| TG, BG, SW | HV gate drivers & switch node | TG/BG drive external N-FETs; SW connects to inductor; requires careful layout to minimize ringing. |
| VINA–H | LV input supplies (8 pins) | Independent 2.25V–5.5V inputs per LV stage; each pair powers one 1A stage (e.g., VINA/SWA for BUCK1). |
| C1–C3 | LV configuration select | 3-bit code sets one of eight LV output current allocations; pulled high/low to define channel currents. |
| FB1–FB4 | LV feedback inputs | Resistor-divider inputs for output voltage setting; VFB1 = 0.800V ±1%, VFB2–4 = 0.800V ±2.5%. |
| EN1–EN4 | LV enable controls | Individual active-high enables with precise thresholds (400–1200mV rising); support staggered power-up sequencing. |
| TEMP | Die temperature monitor | Analog output: 220mV @ 25°C, +7mV/°C slope; used for thermal derating or system-level fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable LV power stages | Eight 1A integrated power stages assigned across four outputs via C1–C3 logic - eliminates discrete FET selection and layout complexity. |
| Ultra-low quiescent current | 23µA HV-only IQ at 3.3VOUT, +9µA per enabled LV channel - extends battery life in always-on automotive modules. |
| Independent LV input supplies | VINA–H pins accept separate 2.25V–5.5V sources - enables mixed-sourcing (e.g., HV VOUT + local LDO) for improved PSRR and fault isolation. |
| Programmable watchdog & RST | CT pin sets WDO timeout (9.7–16.1s) and RST delay (160–280ms) - ensures reliable system reset during brownouts or firmware hangs. |
| Precision enable thresholds | EN1–EN4 rising threshold: 400–1200mV with <100mV hysteresis - enables robust power-up sequencing across multiple voltage rails. |
Applications
| Automotive ADAS Domain Controller | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering SoC cores, DDR memory, and SerDes interfaces in a centralized ADAS domain controller with strict thermal and standby current limits. IC Role / Device Role / Timing Role: LTC3372HUK#TRPBF provides primary 1.8V/3.3V/5V rails from 12V battery; HV controller powers 5V INTVCC and LV inputs; LV regulators deliver 2A/2A/2A/2A with independent sequencing. Use Value: Configurable 8A LV output eliminates need for four discrete buck ICs; –40°C to 150°C rating ensures reliability under hood; 23µA IQ meets ISO 26262 ASIL-B standby requirements. | Use Scenario: Generating isolated 3.3V, 5V, and 12V auxiliary rails for microcontroller, analog front-end, and digital I/O in an industrial PLC backplane module. IC Role / Device Role / Timing Role: LTC3372HUK#TRPBF HV controller regulates 5V from 24V DC input; LV regulators supply 3.3V (2A), 5V (2A), and 12V (via external boost) with EN-controlled startup order. Use Value: Independent VINA–H inputs allow LV regulators to source from HV output or local 5V LDO, improving noise immunity; TEMP pin enables real-time thermal margin monitoring. |
| Medical Patient Monitor | Telecom Remote Radio Unit |
Use Scenario: Supplying low-noise 1.2V, 1.8V, and 3.3V rails to ADCs, FPGAs, and wireless transceivers in a portable patient monitor with battery backup. IC Role / Device Role / Timing Role: LTC3372HUK#TRPBF HV controller steps down 12V main supply to 3.3V; LV regulators configured as 1.2V/2A, 1.8V/2A, 3.3V/2A with soft-start and PGOOD monitoring. Use Value: Burst Mode IQ of 33µA (HV+1LV) extends battery runtime; precision FB tolerance (±1%) ensures stable ADC reference; RST delay prevents false resets during power transitions. | Use Scenario: Providing tightly regulated 1.0V, 1.2V, and 2.5V rails to FPGA, RF transceiver, and baseband processor in a 5G remote radio unit deployed outdoors. IC Role / Device Role / Timing Role: LTC3372HUK#TRPBF HV controller delivers 3.3V from 48V PoE-derived input; LV regulators set to 1.0V/4A (FPGA core), 1.2V/2A (RF IC), 2.5V/2A (data converter) using C1–C3=111 configuration. Use Value: 150°C max junction temperature supports operation in sealed enclosures; programmable fSW (1–3MHz) allows EMI tuning around cellular bands; die temperature monitor feeds into thermal throttling algorithm. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-output power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4475-AEC1 | Single 60V/5A buck controller only; no integrated LV regulators - requires external buck ICs for multi-rail needs. | Not suitable for space-constrained designs needing integrated LV outputs; lacks C1–C3 configurability and die temperature monitor. | Select when only HV conversion is required and board area permits discrete LV solutions. |
| TPS6521905RHBR | 4-channel PMIC with fixed 1.2V/1.8V/3.3V/5V outputs; 3.6V–5.5V input only - no HV capability or configurable current allocation. | Cannot replace HV controller function; limited to low-input applications; no VINA–H independence or wide-temp grade. | Choose for low-voltage, fixed-rail consumer or computing applications where HV input is not needed. |
Compared with MPQ4475-AEC1 and TPS6521905RHBR, the LTC3372HUK#TRPBF uniquely combines 60V HV control with configurable 8A LV integration and automotive-grade temperature range - reducing component count by up to 7 devices while enabling adaptive rail provisioning.
Availability
LTC3372HUK#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, industrial PLC I/O modules, and medical patient monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3372HUK#TRPBF 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3372HUK#TRPBF belongs to Analog Devices' Power by Linear™ family of highly integrated power management ICs, designed specifically for space- and thermal-constrained automotive and industrial systems requiring multi-rail flexibility, ultra-low IQ, and AEC-Q100 qualification.
FAQ
What is the maximum junction temperature rating for the LTC3372HUK#TRPBF?
The LTC3372HUK#TRPBF is rated for operation from –40°C to 150°C junction temperature, making it suitable for under-hood automotive applications and high-ambient industrial environments. This H-grade qualification exceeds standard industrial (–40°C to 125°C) and automotive (–40°C to 125°C) specifications, with overtemperature shutdown triggered at 170°C and 10°C hysteresis.
How does the C1–C3 pin configuration affect LV regulator output currents?
The C1–C3 pins on the LTC3372HUK#TRPBF determine how the eight internal 1A power stages are allocated across the four LV outputs. For example, C1=C2=C3=0 configures all four channels for 2A each, while C1=C2=C3=1 allocates 4A to BUCK1 and 4A to BUCK4. Each combination defines fixed current capabilities per channel, with no dynamic reconfiguration after power-up.
Can the LTC3372HUK#TRPBF operate with different input sources for its LV regulators?
Yes, the LTC3372HUK#TRPBF supports independent input supplies for each LV regulator via dedicated VINA–H pins (VINA/VINB for BUCK1, VINC/VIND for BUCK2, etc.). These can be connected to the HV controller's VOUT, separate LDOs, or other 2.25V–5.5V sources - enabling optimized noise isolation, fault containment, and mixed-source architectures not possible with monolithic multi-rail PMICs.
What is the typical quiescent current of the LTC3372HUK#TRPBF in burst mode with HV and one LV regulator enabled?
In Burst Mode operation, the LTC3372HUK#TRPBF draws 33µA total no-load input supply current when the HV controller is active at 3.3V output and one LV regulator is enabled. Each additional enabled LV regulator adds +9µA, and enabling the watchdog (CT pin floating) or temperature monitor (TEMP pin floating) adds +3µA and +7µA respectively - all verified across the –40°C to 150°C range.
Does the LTC3372HUK#TRPBF include built-in protection features beyond overtemperature?
Yes, the LTC3372HUK#TRPBF integrates multiple protection mechanisms: cycle-by-cycle current limiting per power stage (1.4A–7.2A depending on configuration), input undervoltage lockout on VIN and VINA–H, output overvoltage/undervoltage detection with PGOOD assertion, and watchdog timer with programmable timeout. All protections are hardware-based and operate independently of external firmware or host control.
LTC3372HUK#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 5
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 60V
- Frequency - Switching:
- 1MHz ~ 3MHz
- Duty Cycle (Max):
- 98%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Power Good, Soft Start, Tracking, Watchdog
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
LTC3372HUK#TRPBF FAQ
1.How can I place an order for LTC3372HUK#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3372HUK#TRPBF 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 LTC3372HUK#TRPBF reliable?
The price and inventory of LTC3372HUK#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3372HUK#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3372HUK#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3372HUK#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3372HUK#TRPBF?
LTC3372HUK#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3372HUK#TRPBF 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 LTC3372HUK#TRPBF?
For technical support, including LTC3372HUK#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3372HUK#TRPBF requirements.
6.How does Aetrix verify that LTC3372HUK#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3372HUK#TRPBF 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 LTC3372HUK#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3372HUK#TRPBF?
All LTC3372HUK#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3372HUK#TRPBF, 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 LTC3372HUK#TRPBF part is unused and in its original packaging.
Return procedure for LTC3372HUK#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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