My Inquiry
My Account
Analog Devices Inc. LTC3312SAAV#PBF
- Part No.:
- LTC3312SAAV#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 22-TFQFN Exposed Pad
- Datasheet:
-
LTC3312SAAV#PBF.pdf
- Description:
- IC REG BUCK ADJ 6A/6A DL 22LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:770
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3312SAAV#PBF from Analog Devices is a dual monolithic synchronous 6A step-down DC/DC regulator in a 22-lead 4mm × 3mm × 0.95mm LQFN package, operating from 2.25V to 5.5V input and delivering two independent 6A outputs or a single 12A 2-phase output. It features ±1% total DC output error, 12mΩ high-side/8mΩ low-side MOSFETs, 35ns minimum on-time, and AEC-Q100 qualification for automotive core supplies.
For engineers reviewing the LTC3312SAAV#PBF datasheet, LTC3312SAAV#PBF pinout, LTC3312SAAV#PBF application, or LTC3312SAAV#PBF equivalent, key selection considerations include dual-output vs. 2-phase configuration flexibility, programmable 1–3MHz switching frequency, Burst Mode® operation for <1.4µA shutdown current, and thermal monitoring via SSTT pins for FPGA/ASIC power sequencing.
Technical Context
The LTC3312SAAV#PBF integrates two independent peak-current-mode buck regulators with internal compensation, shared oscillator control via MODE/SYNC and RT pins, and 180° phase interleaving to halve input ripple current. Each channel uses dedicated FB, EN, PGOOD, SSTT, and SW pins, enabling independent voltage setting, enable timing, and soft-start control.
Its architecture supports three operational modes: forced continuous (fast transient response), pulse-skipping (low-noise), and Burst Mode® (high light-load efficiency). The device implements precision enable thresholds (400mV), output overvoltage protection (107–114% of VOUT), and thermal shutdown at 165°C with 5°C hysteresis - all verified across –40°C to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports direct regulation from 3.3V or 5V system rails without pre-regulation. |
| Output Voltage Range | 0.5V to VIN - enables core supply generation for modern low-voltage processors and FPGAs. |
| Max Output Current | Dual 6A or single 12A (2-phase) - delivers high-density POL power with reduced thermal stress per phase. |
| Switching Frequency | Programmable 1–3MHz - allows optimization of size (smaller inductors/caps) vs. efficiency vs. EMI. |
| Top/Bottom RDS(ON) | 12mΩ / 8mΩ - minimizes conduction loss at full load, critical for >90% efficiency at 6A. |
| Feedback Accuracy | ±1% total DC error - ensures tight voltage regulation under line, load, and temperature variation. |
| Shutdown Current | 1.4µA - enables ultra-low-power standby in battery-backed or always-on systems. |
Pinout & Package
The LTC3312SAAV#PBF is housed in a thermally enhanced 22-lead LQFN package (4mm × 3mm × 0.95mm) with exposed pad for low θJC = 4.4°C/W. Pin functions are validated per Analog Devices' Rev. B datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SSTT1, SSTT2 | Soft-start/Tracking/Temperature monitor | 4µA current source for capacitor-based soft-start ramp; below 0.5V enables tracking; above 0.5V outputs ~4mV/°C temp signal. |
| FB1, FB2 | Feedback input | Regulated to 500mV ±5mV - sets output voltage via resistor divider; enables precise multi-rail sequencing. |
| EN1, EN2 | Active-high enable | 400mV precision threshold - supports event-driven power-up by tying to upstream PGOOD or rail. |
| PGOOD1, PGOOD2 | Open-drain power-good | Asserts low when VOUT deviates >3% (UV) or >10% (OV); enables safe system boot and fault detection. |
| SW1, SW2 | Switch node | Connects to external inductor - drives high-frequency current with 35ns min on-time for high VIN/VOUT ratios. |
| PVIN1, PVIN2 | Power input for each buck | Separate high-current paths with internal 20Ω resistors to AVIN - prevents cross-talk between phases. |
| MODE/SYNC | Mode select & sync input | Ground = pulse-skip; AVIN = Burst Mode®; float = forced continuous; external clock = sync up to 3MHz. |
| RT | Frequency programming | Resistor-to-AGND sets fSW; tied to AVIN = default 2MHz - eliminates need for external clock generator. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 6A or 2-phase 12A configuration | Enables flexible power architecture: independent dual rails for I/O + core, or interleaved high-current rail with reduced input/output ripple. |
| Burst Mode® operation | Achieves >85% efficiency at 1mA load with <1.4µA quiescent current - extends battery life in always-on subsystems. |
| Internal input capacitors | Reduces required external ceramic capacitance and PCB area - lowers EMI filter complexity and cost. |
| Thermal monitoring via SSTT pins | Provides real-time die temperature feedback (4mV/°C) without external sensor - simplifies thermal management in compact enclosures. |
| AEC-Q100 qualified | Rated for automotive applications (–40°C to 125°C) - supports infotainment, ADAS, and gateway ECUs requiring high reliability. |
Applications
| Application 1 | Application 2 |
|---|---|
Use Scenario: Powering dual-voltage domains in Xilinx Kria KV260 vision AI starter kit - 1.2V core and 1.8V I/O rails. IC Role / Device Role / Timing Role: Dual-output buck regulator providing independent, sequenced, and monitored power to FPGA fabric and transceivers. Use Value: Eliminates need for two discrete 6A regulators; reduces board area by 40% and enables single-chip thermal derating analysis. | Use Scenario: Generating 1.0V/12A for NVIDIA Jetson Orin NX CPU core using 2-phase interleaved topology. IC Role / Device Role / Timing Role: Single-output 2-phase buck controller synchronizing two internal power stages with 180° phase shift. Use Value: Cuts input ripple current by 50%, allowing smaller input capacitors and easing EMI compliance in dense compute modules. |
| Application 3 | Application 4 |
Use Scenario: Supplying 0.85V/6A and 1.1V/6A to TI TDA4VM Jacinto 7 processor's C7x DSP and MMA accelerators. IC Role / Device Role / Timing Role: Dual-channel PMIC delivering tightly regulated, independently enabled rails with PGOOD sequencing. Use Value: Meets ±1% output accuracy requirement across temperature; enables deterministic boot via EN1/EN2 delay control. | Use Scenario: Powering radar SoC (e.g., Infineon AURIX TC4xx) in automotive ADAS domain controller with functional safety requirements. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual buck supplying safety-critical core and peripheral rails with OV/UV/thermal fault reporting. Use Value: Integrates PGOOD, OVP, and thermal monitor into one package - reduces BOM count and simplifies ASIL-B compliance evidence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8866GQ-Z | 4.5–18V input; 6A dual output; no 2-phase mode; lower integration (no SSTT/temp monitor) | Targeted at industrial 12V intermediate bus; lacks automotive qualification and thermal telemetry | Select when input exceeds 5.5V and thermal monitoring is unnecessary. |
| TPS546B24RVFT | Single 20A output only; supports PMBus; requires external compensation; larger 30-pin QFN | Used in server VR13/VR14 applications with digital control; not suitable for dual-rail or space-constrained designs | Select when digital telemetry and higher current (>12A) are required, and board area is not constrained. |
Compared with MP8866GQ-Z and TPS546B24RVFT, the LTC3312SAAV#PBF uniquely combines dual 6A + 2-phase 12A configurability, AEC-Q100 qualification, integrated thermal sensing, and sub-2mm height - making it optimal for automotive and edge-AI compute where density, reliability, and analog telemetry matter.
Availability
LTC3312SAAV#PBF is available at Aetrix Electronics and suitable for FPGA core supplies, automotive ADAS domain controllers, and high-density telecom POL applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3312SAAV#PBF 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 (now part of Analog Devices, Inc., following merger with Maxim Integrated) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3312SAAV#PBF belongs to the Power by Linear™ family of monolithic DC/DC regulators, designed specifically for high-efficiency, high-density point-of-load power in space- and thermal-constrained applications including automotive, computing, and optical networking.
FAQ
What is the maximum supported switching frequency for LTC3312SAAV#PBF?
The LTC3312SAAV#PBF supports a programmable switching frequency range of 1MHz to 3MHz. This is achieved either by connecting an external resistor from the RT pin to AGND or by applying an external clock signal to the MODE/SYNC pin. At RT = AVIN, the default frequency is 2MHz ±15%, verified across –40°C to 125°C junction temperature. The LTC3312SAAV#PBF maintains stable operation and specified efficiency across this full range.
Can LTC3312SAAV#PBF be used in 2-phase mode with only one output voltage?
Yes, the LTC3312SAAV#PBF can be configured as a single 12A 2-phase buck regulator. This is accomplished by connecting FB2 and SSTT2 to AVIN, grounding EN2, and leaving PGOOD2 floating or tied to ground. In this mode, EN1 controls both phases, PGOOD1 serves as the combined power-good indicator, and the top switches operate 180° out of phase - reducing input ripple and improving thermal distribution. The LTC3312SAAV#PBF maintains ±1% output accuracy in this configuration.
Does LTC3312SAAV#PBF include overvoltage protection?
Yes, the LTC3312SAAV#PBF includes output overvoltage protection that triggers when the regulated output exceeds 107–114% of the nominal VOUT (programmed via FB divider). Upon detection, the top switch is disabled and the bottom switch is activated to clamp the output, preventing damage to downstream loads. Recovery is automatic after the fault condition clears. This protection is active in all operating modes - forced continuous, pulse-skipping, and Burst Mode® - and is specified across the full temperature range.
What is the purpose of the SSTT pins on LTC3312SAAV#PBF?
The SSTT1 and SSTT2 pins on the LTC3312SAAV#PBF serve three integrated functions: soft-start timing (via 4µA current charging an external capacitor), voltage tracking (when pulled below 0.5V), and die temperature monitoring (outputting ~4mV/°C above 0.5V). During startup, SSTT controls ramp rate; during normal operation, it provides real-time thermal telemetry without external sensors. The LTC3312SAAV#PBF uses this signal internally for thermal foldback and fault recovery - enhancing reliability in sealed or fanless enclosures.
Is LTC3312SAAV#PBF qualified for automotive applications?
Yes, the LTC3312SAAV#PBF is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C junction temperature). It undergoes rigorous stress testing including HTOL, temperature cycling, and ESD per AEC-Q100 Rev H. The "A" suffix in LTC3312SAAV#PBF denotes the automotive-grade variant with controlled manufacturing and extended reliability reporting - making it suitable for ADAS, infotainment, and body electronics where functional safety and long-term stability are critical. The LTC3312SAAV#PBF meets automotive PPAP requirements.
LTC3312SAAV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 22-TFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A, 6A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 22-LQFN (4x3)
LTC3312SAAV#PBF FAQ
1.How can I place an order for LTC3312SAAV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3312SAAV#PBF 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 LTC3312SAAV#PBF reliable?
The price and inventory of LTC3312SAAV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3312SAAV#PBF is usually 5 days.
3.What payment methods are accepted for LTC3312SAAV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3312SAAV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3312SAAV#PBF?
LTC3312SAAV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3312SAAV#PBF 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 LTC3312SAAV#PBF?
For technical support, including LTC3312SAAV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3312SAAV#PBF requirements.
6.How does Aetrix verify that LTC3312SAAV#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3312SAAV#PBF 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 LTC3312SAAV#PBF meets industry standards.
7.What is the process for return or replacement of LTC3312SAAV#PBF?
All LTC3312SAAV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3312SAAV#PBF, 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 LTC3312SAAV#PBF part is unused and in its original packaging.
Return procedure for LTC3312SAAV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3312SAAV#PBF 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…
