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Analog Devices Inc. LTC3374IFE#TRPBF
- Part No.:
- LTC3374IFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3374IFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A 8OUT 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,353
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Product details
Overview
LTC3374IFE#TRPBF from Analog Devices (formerly Linear Technology) is an 8-channel synchronous buck DC/DC regulator IC with independent 1A per channel capability, programmable 1MHz–3MHz switching frequency, precision enable thresholds (±30mV), and die temperature monitoring via analog TEMP pin. It supports master-slave parallel configuration up to 4A per output using shared inductors and targets multirail power delivery in space-constrained industrial and automotive control systems.
For engineers reviewing the LTC3374IFE#TRPBF datasheet, LTC3374IFE#TRPBF pinout, LTC3374IFE#TRPBF application, or LTC3374IFE#TRPBF equivalent, key selection criteria include independent VIN supply support (2.25V–5.5V per channel), 0.8V–VIN output range, phased 90° switching for EMI reduction, PGOOD_ALL fault reporting, and thermal-aware design enabled by the 6.75mV/°C TEMP output.
Technical Context
The LTC3374IFE#TRPBF integrates eight fully independent synchronous buck regulators, each with dedicated VIN, SW, FB, and EN pins, enabling flexible rail assignment and autonomous sequencing. All channels share a common oscillator architecture-programmable via RT resistor, synchronizable to external clock, or fixed at 2MHz-and operate in either Burst Mode (low IQ at light load) or forced continuous mode (fixed-frequency, low-noise).
Its thermal management includes a calibrated analog die temperature monitor (150mV @ 25°C, 6.75mV/°C slope) and overtemperature shutdown at 165°C with 10°C hysteresis. Power failure detection is centralized via open-drain PGOOD_ALL, asserting low if any enabled regulator's output drops >7.5% below regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel count | 8 independent 1A synchronous buck regulators, configurable as 1A–4A outputs via master-slave pairing |
| Input voltage range | 2.25V to 5.5V per VIN pin-supports mixed-rail inputs and isolated domain powering |
| Output voltage range | 0.8V to VIN per channel-enables low-voltage core rails (e.g., 0.8V, 1.0V, 1.2V) and higher auxiliary supplies |
| Switching frequency | 1MHz to 3MHz (programmable via RT); default 2MHz internal oscillator; externally synchronizable |
| Enable threshold accuracy | ±30mV hysteresis; rising threshold 400–1200mV (all-off) or 380–420mV (at-least-one-on)-ensures robust power-up sequencing |
| Die temperature sensing | Analog TEMP pin: 150mV @ 25°C, 6.75mV/°C slope-enables real-time thermal margining without external sensor |
| Package & thermal | 38-lead TSSOP; θJA = 25°C/W; exposed pad must be soldered to PCB ground for rated performance |
Pinout & Package
Package: 38-lead plastic TSSOP (FE package), 11.7mm × 4.4mm × 1.2mm body, exposed thermal pad (Pin 39 = GND). Requires solid thermal connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN8 (Pins 3,2,17,16,22,21,36,35) | Per-channel enable input | Active-high logic; precise thresholds enable deterministic multi-rail power sequencing |
| FB1–FB8 (Pins 4,9,10,15,23,28,29,34) | Per-channel feedback input | Connects to resistor divider; 800mV nominal reference enables accurate output voltage setting |
| VIN1–VIN8 (Pins 5,8,11,14,24,27,30,33) | Per-channel input supply | Independent 2.25V–5.5V inputs allow domain isolation and mixed-voltage system integration |
| SW1–SW8 (Pins 6,7,12,13,25,26,31,32) | Per-channel switch node | Connects to external inductor; supports phase interleaving (90° offset) to reduce input ripple current |
| PGOOD_ALL (Pin 18) | Global power-good status | Open-drain output; pulls low if any enabled regulator deviates >7.5% from target-simplifies system-level fault monitoring |
| TEMP (Pin 1) | Digital die temperature indicator | Analog voltage output (150mV @ 25°C, +6.75mV/°C) - provides direct thermal telemetry for thermal throttling or derating logic |
| MODE (Pin 37) | Global operating mode control | Low = Burst Mode (high efficiency at light load); High = forced continuous (low noise, fixed frequency) |
| SYNC (Pin 19) | External clock synchronization input | Accepts 1MHz–3MHz square wave; automatically adjusts slope compensation-enables EMI-critical synchronized systems |
| RT (Pin 20) | Oscillator frequency programming | Resistor-to-GND sets fSW (1–3MHz); tied to VCC selects 2MHz internal clock-no external crystal required |
| VCC (Pin 38) | Internal bias supply | 2.7V–5.5V input; powers internal circuitry-requires ≥10µF ceramic bypass to GND |
| GND (Pin 39) | Power and signal ground | Exposed thermal pad; must be soldered to large PCB ground plane for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel 1A buck integration | Reduces board area vs discrete solutions; eliminates 7x external controllers, gate drivers, and feedback networks |
| Configurable master-slave combining | Up to four adjacent channels can be paralleled (e.g., BUCK1+BUCK2+BUCK3+BUCK4) for 4A output with single inductor-saves cost and layout space |
| Phased 90° switching | Minimizes input capacitor RMS current and conducted EMI-reduces required bulk capacitance by ~30% vs in-phase operation |
| Precision enable thresholds | Enables reliable autonomous power-up sequencing across 8 rails without external supervisors or timing components |
| Integrated die temperature monitor | Eliminates need for external thermal sensor; enables closed-loop thermal management in FPGA/ASIC power systems |
| Single-pin global MODE control | Simultaneously configures all active channels for Burst Mode (efficiency) or forced continuous (noise/EMI) - simplifies system-level power policy |
Applications
| Industrial PLC I/O Module | Automotive ADAS Domain Controller |
|---|---|
|
Use Scenario: Powering mixed-voltage FPGA I/O banks, isolated CAN transceivers, ADC references, and microcontroller cores within compact DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Primary multirail PMIC delivering 0.8V (FPGA core), 1.2V (I/O), 2.5V (ADC), 3.3V (CAN), and 5V (isolated supply) from a 12V or 24V intermediate bus. Use Value: Independent VIN pins allow separation of noisy digital and sensitive analog domains; PGOOD_ALL enables single-wire system health monitoring. |
Use Scenario: Supplying SoC cores, memory interfaces, image sensors, and radar MMICs in centralized ADAS ECUs with strict thermal and EMI requirements. IC Role / Device Role / Timing Role: Centralized power manager providing 0.85V (SoC), 1.1V (LPDDR4), 1.8V (sensor interface), and 3.3V (radar bias) with synchronized switching to avoid beat frequencies. Use Value: Phased 90° switching reduces peak input current and EMI; TEMP pin enables dynamic SoC throttling based on local die temperature. |
| Communications Baseband Unit | Medical Imaging Signal Chain |
|
Use Scenario: Generating tightly regulated, low-noise rails for high-speed SerDes, DSPs, and RF front-end biasing in 5G macrocell baseband units. IC Role / Device Role / Timing Role: Eight-rail solution supporting 0.8V (DSP core), 1.0V (SerDes), 1.2V (PHY), 1.8V (memory), 2.5V (DAC), 3.3V (control logic), and dual 5V rails (RF bias). Use Value: Forced continuous mode (via MODE pin) ensures stable low-noise operation during burst data transmission; SYNC pin enables alignment with system clock tree. |
Use Scenario: Powering ultra-low-noise analog front-ends (AFE), high-resolution ADCs, FPGA-based reconstruction engines, and display controllers in portable ultrasound systems. IC Role / Device Role / Timing Role: Precision multirail source delivering 1.2V (AFE), 1.8V (ADC digital), 2.5V (reference), 3.3V (FPGA I/O), and 5V (display backlight) with <±1% load regulation. Use Value: Independent FB pins enable per-rail trimming; Burst Mode extends battery life during idle acquisition phases without compromising startup time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6508610RSLR | 6-channel, max 3A per output; integrated LDOs; I²C programmable; no analog TEMP output | Requires digital interface for configuration; lacks die temperature telemetry; smaller channel count | Choose when I²C configurability and integrated LDOs outweigh need for 8 independent bucks and analog thermal monitoring |
| ISL91211BIIZ-T | 4-channel, max 4A per output; 2.5V–5.5V input; no per-VIN flexibility; integrated telemetry (I²C) | Fixed 4-channel topology; no independent VIN per channel; relies on digital bus for thermal data | Prefer when system requires fewer rails and digital telemetry integration is prioritized over analog TEMP and per-rail input isolation |
Compared with TPS6508610RSLR and ISL91211BIIZ-T, the LTC3374IFE#TRPBF uniquely delivers eight independently powered buck channels with analog die temperature monitoring and true per-rail enable/feedback control-making it optimal for thermally constrained, mixed-domain systems requiring minimal external components and deterministic analog supervision.
Availability
LTC3374IFE#TRPBF is available at Aetrix Electronics and suitable for industrial automation, automotive ADAS, and communications infrastructure applications requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +125°C operation.
Supply support for LTC3374IFE#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC3374IFE#TRPBF belongs to ADI's Power by Linear™ family of highly integrated DC/DC solutions, designed specifically for space- and thermal-constrained multirail systems where reliability, precision sequencing, and analog telemetry are critical.
FAQ
What is the maximum output current achievable per channel with LTC3374IFE#TRPBF?
The LTC3374IFE#TRPBF supports up to 4A per output by combining up to four adjacent buck channels (e.g., BUCK1–BUCK4) in master-slave configuration using shared inductors and interconnecting FB and VIN pins. Each individual channel delivers 1A, but parallel operation increases current capacity while maintaining single-point feedback control and thermal sharing.
Does LTC3374IFE#TRPBF require external compensation components?
No, the LTC3374IFE#TRPBF features internally compensated buck regulators. Only external resistive feedback dividers are needed to set output voltage; no external compensation capacitors or resistors are required for stability across its full load and input voltage range.
How does the TEMP pin on LTC3374IFE#TRPBF function in system thermal management?
The TEMP pin on LTC3374IFE#TRPBF outputs an analog voltage proportional to die temperature (150mV at 25°C, +6.75mV/°C). This allows direct ADC measurement for real-time thermal monitoring, enabling host MCU-driven throttling, fan control, or fault logging without adding discrete temperature sensors.
Can LTC3374IFE#TRPBF operate with different input voltages on each channel?
Yes, LTC3374IFE#TRPBF supports independent input supplies on VIN1–VIN8 (2.25V–5.5V each), enabling true domain isolation-for example, powering noise-sensitive analog rails from a clean LDO while driving digital rails from a higher-current switcher, all within one IC.
What is the purpose of the PGOOD_ALL pin on LTC3374IFE#TRPBF?
The PGOOD_ALL pin on LTC3374IFE#TRPBF is an open-drain output that asserts low if the regulated output voltage of *any* enabled buck channel falls more than 7.5% below its programmed value. It provides a single-wire system-level power-fault indication, simplifying supervisor IC requirements in complex multirail designs.
LTC3374IFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 8
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
LTC3374IFE#TRPBF FAQ
1.How can I place an order for LTC3374IFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3374IFE#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 LTC3374IFE#TRPBF reliable?
The price and inventory of LTC3374IFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3374IFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3374IFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3374IFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3374IFE#TRPBF?
LTC3374IFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3374IFE#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 LTC3374IFE#TRPBF?
For technical support, including LTC3374IFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3374IFE#TRPBF requirements.
6.How does Aetrix verify that LTC3374IFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3374IFE#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 LTC3374IFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3374IFE#TRPBF?
All LTC3374IFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3374IFE#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 LTC3374IFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3374IFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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