My Inquiry
My Account
Analog Devices Inc. LTC3311JV-0.75#TRPBF
- Part No.:
- LTC3311JV-0.75#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 18-TFQFN Exposed Pad
- Datasheet:
-
LTC3311JV-0.75#TRPBF.pdf
- Description:
- IC REG BUCK 0.75V 12.5A 18LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,677
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3311JV-0.75#TRPBF from Analog Devices is a monolithic, Silent Switcher® step-down DC/DC converter delivering up to 12.5A output current from a 2.25V–5.5V input, with fixed 0.75V output voltage, ±1% accuracy over load and temperature, and operation up to 5MHz switching frequency. It integrates high-efficiency NMOS (4.5mΩ) and PMOS (16mΩ) power switches and supports forced continuous or pulse-skipping mode in FPGA core supply applications.
For engineers reviewing the LTC3311JV-0.75#TRPBF datasheet, LTC3311JV-0.75#TRPBF pinout, LTC3311JV-0.75#TRPBF application, or LTC3311JV-0.75#TRPBF equivalent, key selection criteria include its AEC-Q100 qualified 3mm × 3mm LQFN package, 35ns minimum on-time, remote-sense-enabled 0.75V regulation with active voltage positioning (1.6mV/A), and integrated power good, thermal monitoring, and clock synchronization functions.
Technical Context
The LTC3311JV-0.75#TRPBF employs constant-frequency peak current mode control with a 500mV internal reference (adjusted for 0.75V output via internal resistor divider), enabling fast transient response and stable regulation across wide load and input ranges. Its Silent Switcher 1 architecture minimizes EMI through symmetrical layout and integrated bypass capacitors, achieving CISPR 25 Class 5 radiated emissions compliance without external filters.
It supports multi-phase parallel operation via MODE/SYNC pin, configurable for synchronization to external clocks (0.5–2.25MHz) or internal PLL-based clock output. The device implements dual current limiting-peak switch current (15–21A) and valley inductor current (12–16A)-plus output overvoltage protection (105–115% of VOUT), thermal shutdown, and die temperature monitoring via SSTT pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 0.75V with ±1% accuracy over full load (0–12.5A) and temperature (–40°C to +150°C), enabling precise core rail regulation for advanced processors. |
| IOUT Max | 12.5A continuous output current capability, sufficient for high-performance FPGA, ASIC, and µP core supplies without external current sharing. |
| VIN Range | 2.25V to 5.5V input range supports single-cell Li-ion, 3.3V, and 5V intermediate bus architectures with robust UVLO (2.0–2.2V hysteresis). |
| fSW | Programmable 0.5–5MHz switching frequency via RT pin; default 2MHz at RT = 274kΩ enables compact 100nH inductors and low-profile ceramic capacitors. |
| RDS(ON) | 4.5mΩ NMOS and 16mΩ PMOS integrated power switches deliver >90% efficiency at 12.5A/0.75V (VIN = 3.3V), minimizing conduction loss and thermal stress. |
| Min On-Time | 35ns minimum on-time supports high step-down ratios (e.g., 3.3V→0.75V at 2MHz), maintaining regulation even at ultra-low duty cycles. |
| Package | 18-lead 3mm × 3mm LQFN with exposed PGND pad (Pin 19), offering θJC = 9°C/W bottom thermal resistance for high-power density PCB layouts. |
Pinout & Package
Package: 18-lead (3mm × 3mm) LQFN with thermally enhanced exposed PGND pad (Pin 19), rated for –40°C to +150°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable input with precision threshold | 400mV rising threshold with 60mV hysteresis; 1μA shutdown current enables reliable power sequencing in multi-rail systems. |
| AGND (2) | Remote sense ground reference | Kelvin connection point for feedback divider low-side; compensates for up to ±100mV PCB trace IR drop between IC and load. |
| VIN (3,4,11,12) | Main input power supply inputs | Four parallel VIN pins reduce impedance and distribute high di/dt current; require local low-ESR ceramic bypassing to PGND. |
| PGND (5,10,19) | Power ground return path | Three dedicated PGND pins plus exposed pad form primary thermal and current return path; must be soldered to large PCB ground plane. |
| SW (6–9) | Switch node outputs | Four paralleled SW pins connect directly to inductor; minimize loop inductance critical for EMI performance and efficiency. |
| MODE/SYNC (13) | Multi-phase sync and mode control | Configures pulse-skipping vs. forced continuous mode; accepts external clock (0.5–2.25MHz) or outputs synchronized clock for phase interleaving. |
| PGOOD (14) | Open-drain power-good indicator | Asserts high when VOUT is within 97–99% of nominal; 125μs delay filters transients; supports wired-OR for multi-phase systems. |
| RT (15) | Oscillator frequency programming | Resistor-to-AGND sets fSW (0.5–5MHz); also configures phase offset in multi-phase setups. |
| SSTT (16) | Soft-start, tracking, temperature monitor | 10μA current source for soft-start capacitor; tracks FB during startup; settles to ~4mV/°C for die temperature readout post-startup. |
| ITH (17) | Loop compensation node | Connects external RC network to AGND for Type II/III compensation; sets bandwidth and phase margin of current-mode control loop. |
| VOUT (18) | Fixed-output voltage sense | Internally connected to factory-trimmed resistor divider; eliminates external feedback components required for adjustable versions. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Integrated dual-input, dual-output power stage with balanced layout reduces radiated EMI by >30dB vs. conventional buck converters, meeting CISPR 25 Class 5 without added filtering. |
| Active Voltage Positioning (AVP) | Output voltage drops linearly with load (1.6mV/A for LTC3311JV-0.75#TRPBF), improving transient response and reducing bulk capacitance requirements by up to 40%. |
| Robust Protection Suite | Includes output overvoltage (105–115%), overtemperature shutdown, output short-circuit recovery via SSTT-triggered soft-start, and valley current limiting to prevent inductor saturation under overload. |
| Thermally Optimized LQFN | 3mm × 3mm footprint with 1.25°C/W ΨJT and 9°C/W θJC(bottom) enables 12.5A operation at <150°C junction temperature with standard 2oz copper PCBs. |
| AEC-Q100 Qualified | Qualified to Grade 1 (–40°C to +125°C ambient) / Grade 0 (–40°C to +150°C junction), supporting automotive infotainment, ADAS domain controllers, and industrial safety-critical systems. |
Applications
| High-Performance FPGA Core Supply | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Powering Xilinx Versal or Intel Agilex FPGA core rails requiring tight 0.75V ±1% tolerance, fast load-step response (<10µs), and low noise in space-constrained automotive ECUs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 12.5A at 0.75V with AVP, remote sensing, and PGOOD signaling to FPGA configuration logic. Use Value: Eliminates need for external feedback resistors and compensation components; Silent Switcher EMI reduction avoids costly shielding; 3mm × 3mm size saves >60% board area vs. discrete solutions. | Use Scenario: Supplying vision processor SoCs (e.g., NVIDIA Orin) in camera modules where thermal management, functional safety, and EMI compliance are mandatory per ISO 26262 ASIL-B. IC Role / Device Role / Timing Role: AEC-Q100 qualified DC/DC converter providing fault-tolerant 0.75V core power with thermal monitoring (SSTT), PGOOD status, and multi-phase sync for redundant power domains. Use Value: Junction temperature monitoring enables real-time derating; built-in OVP and short-circuit recovery reduce BOM count and improve system-level reliability; Class 5 EMI compliance simplifies EMC validation. |
| Industrial Edge AI Accelerator | 5G Baseband Radio Unit (RU) |
Use Scenario: Powering Arm-based AI inference accelerators (e.g., Google Coral TPU) in fanless edge servers operating at ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: High-current POL regulator with forced continuous mode and 2MHz switching, enabling small 100nH inductors and rapid transient recovery during burst-mode AI workloads. Use Value: 4.5mΩ NMOS RDS(ON) limits conduction loss to <1W at 12.5A; 150°C max junction rating allows operation without heatsinks; RT-programmable frequency optimizes efficiency vs. size trade-off. | Use Scenario: Generating 0.75V core voltage for massive-MIMO RFICs in outdoor 5G RU cabinets subject to wide temperature swings (–40°C to +85°C) and strict EMI limits. IC Role / Device Role / Timing Role: EMI-optimized buck converter synchronized to baseband clock (via MODE/SYNC) to avoid heterodyne interference in sensitive RF front-end circuits. Use Value: Clock synchronization eliminates beat frequencies; CISPR 25 compliance prevents radiated emissions from disrupting adjacent 28GHz mmWave bands; 35ns min on-time ensures regulation during deep voltage droops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3311HV-0.75#TRPBF | Same architecture and electrical specs, but rated for –40°C to +150°C junction temperature with H-grade qualification (vs. J-grade for LTC3311JV-0.75#TRPBF); identical pinout and footprint. | Targeted at extended-temperature industrial and aerospace applications where sustained operation above 125°C ambient is required. | Select LTC3311HV-0.75#TRPBF only if full -40°C to +150°C operation must be guaranteed across all process corners; otherwise LTC3311JV-0.75#TRPBF meets most automotive and industrial needs. |
| MP2960GQ-0075-Z | Monolithic 12A buck with fixed 0.75V output, but lacks Silent Switcher EMI suppression, AVP, and SSTT temperature monitoring; uses different 16-pin QFN package. | Suitable for cost-sensitive, non-EMI-critical consumer applications where thermal monitoring and ultra-low EMI are not required. | Choose MP2960GQ-0075-Z only for non-automotive, non-industrial designs with relaxed EMI and thermal requirements; it cannot replace LTC3311JV-0.75#TRPBF in AEC-Q100 or CISPR 25-compliant systems. |
Compared with LTC3311HV-0.75#TRPBF, the LTC3311JV-0.75#TRPBF offers identical performance at lower cost for applications not requiring full H-grade temperature validation, while MP2960GQ-0075-Z provides basic 0.75V regulation but omits critical features like EMI control, AVP, and die temperature sensing needed in high-reliability systems.
Availability
LTC3311JV-0.75#TRPBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS domain controllers, and industrial edge AI accelerators requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC3311JV-0.75#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3311 family is designed as ultra-compact, low-EMI, high-current monolithic buck regulators targeting space-constrained, noise-sensitive applications such as processor core power, automotive infotainment, and distributed POL systems.
FAQ
What is the output voltage tolerance of the LTC3311JV-0.75#TRPBF over temperature and load?
The LTC3311JV-0.75#TRPBF guarantees ±1% output voltage accuracy over the full operating junction temperature range (–40°C to +150°C) and load current (0A to 12.5A), as verified by production testing per the Electrical Characteristics table. At IOUT = 12.5A, the measured VOUT is 743mV (min) to 750.3mV (max), confirming tight regulation essential for advanced processor cores. This specification holds with remote sensing enabled via AGND connection.
Does the LTC3311JV-0.75#TRPBF require external feedback resistors?
No, the LTC3311JV-0.75#TRPBF does not require external feedback resistors because it is the fixed-output variant of the LTC3311 family. The 0.75V output is set by an internal, factory-trimmed resistor divider connected to the VOUT pin (Pin 18). In contrast, the base LTC3311 requires external RA/RB resistors to program VOUT; using those pins on the LTC3311JV-0.75#TRPBF will not alter regulation and may impair performance.
How does the Silent Switcher architecture in the LTC3311JV-0.75#TRPBF reduce EMI?
The LTC3311JV-0.75#TRPBF implements Silent Switcher 1 architecture through symmetrical, opposing power loops with integrated input capacitors, minimizing magnetic field coupling and common-mode noise. Measured radiated emissions meet CISPR 25 Class 5 peak limits without external EMI filters, reducing system-level filtering cost and board area. Layout best practices-such as short, wide SW and VIN traces and solid PGND planes-are critical to achieving this performance.
Can the LTC3311JV-0.75#TRPBF be synchronized to an external clock?
Yes, the LTC3311JV-0.75#TRPBF supports external clock synchronization via the MODE/SYNC pin (Pin 13). Applying a square wave clock signal (0.5–2.25MHz) synchronizes the internal oscillator using a PLL, locking top-switch turn-on to the rising edge. During sync, the device operates in forced continuous mode, and slope compensation automatically adapts. Removal of the external clock is detected within ~20µs, after which the oscillator returns to its default frequency.
What thermal management features does the LTC3311JV-0.75#TRPBF provide?
The LTC3311JV-0.75#TRPBF includes integrated thermal management via its SSTT pin (Pin 16), which serves as a die temperature monitor with a calibrated 4mV/°C slope after soft-start completion. It also features thermal shutdown protection that disables switching above +150°C junction temperature. The 3mm × 3mm LQFN package has low θJC(bottom) = 9°C/W, and the exposed PGND pad (Pin 19) must be soldered to a large PCB ground plane with multiple vias for effective heat dissipation.
LTC3311JV-0.75#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®1
- Package/Case:
- 18-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.75V
- Voltage - Output (Max):
- -
- Current - Output:
- 12.5A
- Frequency - Switching:
- 500kHz ~ 5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-LQFN (3x3)
LTC3311JV-0.75#TRPBF FAQ
1.How can I place an order for LTC3311JV-0.75#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3311JV-0.75#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 LTC3311JV-0.75#TRPBF reliable?
The price and inventory of LTC3311JV-0.75#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3311JV-0.75#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3311JV-0.75#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3311JV-0.75#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3311JV-0.75#TRPBF?
LTC3311JV-0.75#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3311JV-0.75#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 LTC3311JV-0.75#TRPBF?
For technical support, including LTC3311JV-0.75#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3311JV-0.75#TRPBF requirements.
6.How does Aetrix verify that LTC3311JV-0.75#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3311JV-0.75#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 LTC3311JV-0.75#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3311JV-0.75#TRPBF?
All LTC3311JV-0.75#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3311JV-0.75#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 LTC3311JV-0.75#TRPBF part is unused and in its original packaging.
Return procedure for LTC3311JV-0.75#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3311JV-0.75#TRPBF 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…
