My Inquiry
My Account
Analog Devices Inc. LTC3309AHV#TRPBF
- Part No.:
- LTC3309AHV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3309AHV#TRPBF.pdf
- Description:
- IC REG BUCK PROG 6A 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,196
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3309AHV#TRPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 6A continuous output current, operating from 2.25V to 5.5V input, regulating down to 0.5V with ±1% VFB accuracy, and featuring Silent Switcher® architecture for ultralow EMI in optical networking power supplies.
For engineers reviewing the LTC3309AHV#TRPBF datasheet, LTC3309AHV#TRPBF pinout, LTC3309AHV#TRPBF application, or LTC3309AHV#TRPBF equivalent, key selection criteria include its 22ns minimum on-time, 1–3MHz programmable switching frequency, forced continuous/pulse-skip/Burst Mode™ operation, AEC-Q100 qualification (H-grade), and thermally enhanced 2mm × 2mm LQFN package with exposed PGND pad.
Technical Context
The LTC3309AHV#TRPBF uses constant-frequency peak current mode control with internal compensation and supports three selectable operating modes via the MODE/SYNC pin: forced continuous (floating), pulse skip (grounded), or Burst Mode™ (tied to VIN). Its 22ns minimum on-time enables high step-down ratios at high frequencies, while slope compensation adapts automatically during external clock synchronization (1–3MHz).
It integrates 31mΩ PMOS and 8mΩ NMOS power switches, delivers up to 100% duty cycle for low-dropout operation, and includes comprehensive protection: output overvoltage (107–114% VOUT threshold), short-circuit recovery via valley current limiting (IVALLEYMAX = 7.8A), thermal shutdown (TJ = 165°C), and precision enable (400mV threshold, 50mV hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and intermediate bus rails without pre-regulation. |
| VOUT Range | 0.5V to VIN - enables core voltage regulation for FPGAs, ASICs, and microprocessors. |
| Output Accuracy | ±1% over temperature - ensures stable rail tolerance across –40°C to +150°C junction range. |
| Switching Frequency | 1MHz to 3MHz (RT-programmable) - allows compact magnetics and avoids AM band interference. |
| Min On-Time | 22ns - enables 0.5V output from 2.5V input at 2MHz, critical for high-ratio POL conversion. |
| Quiescent Current | 40µA in Burst Mode sleep - extends battery life in always-on IoT and automotive infotainment systems. |
| Thermal Rating | Junction temp rated to +150°C (H-grade) - qualified per AEC-Q100 for under-hood automotive use. |
Pinout & Package
The LTC3309AHV#TRPBF is housed in a thermally enhanced 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed PGND pad (Pin 13), requiring solder connection to PCB ground plane for optimal thermal resistance (θJB = 12°C/W) and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (1) | Analog ground reference | Remote sense return for FB; must connect directly to output capacitor negative terminal at load to reject PCB IR drop. |
| EN (2) | Enable control input | 400mV precision threshold with 50mV hysteresis; enables power-up sequencing with resistor dividers from upstream rails. |
| VIN (3,8) | Main input power supply | Dual pins reduce trace inductance; require parallel low-ESR ceramic capacitors to both AGND and PGND for stability. |
| PGND (4,7,13) | Power ground return path | Exposed pad (Pin 13) is primary thermal and electrical sink; must be connected to large PCB ground plane with ≥6 vias. |
| SW (5,6) | Switch node output | Dual pins minimize switching loop inductance; connect together and route directly to inductor with shortest possible wide copper trace. |
| MODE/SYNC (9) | Mode selection & clock sync | Configures operation mode (Burst/Pulse Skip/Forced Continuous) or accepts 1–3MHz external clock for system-wide timing alignment. |
| RT (10) | Frequency programming | Resistor to AGND sets switching frequency; open or tied to VIN selects default ~2MHz oscillator. |
| PGOOD (11) | Power good indicator | Open-drain output pulled low if VOUT falls below 97% or exceeds 110% of regulation; includes 120µs delay and hysteresis for noise immunity. |
| FB (12) | Feedback voltage input | Regulates to 500mV; connects to resistor divider from VOUT to AGND; phase-lead cap between FB and VOUT improves transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Integrated dual-switch layout and optimized package parasitics reduce radiated EMI by >30dB vs conventional buck ICs, eliminating need for metal shields in sensitive RF modules. |
| Burst Mode® Operation | 40µA quiescent current with <10mVPP output ripple at light loads - maintains high efficiency (>85% at 1mA) while avoiding audible noise in portable medical devices. |
| 22ns Minimum On-Time | Enables 0.5V output from 2.5V input at 2MHz without external components - eliminates need for cascaded regulators in space-constrained FPGA core supplies. |
| AEC-Q100 Qualified (H-grade) | Rated for –40°C to +150°C junction temperature with full parametric validation - suitable for engine control units, ADAS cameras, and automotive infotainment without derating. |
| Internal Compensation | Eliminates external compensation network - reduces BOM count and layout sensitivity while maintaining stability across 1–3MHz and 0.5–5.5V output ranges. |
Applications
| Optical Networking Power Supply | FPGA Core Voltage Regulation |
|---|---|
Use Scenario: Providing clean, low-noise 1.2V/6A power to SFP+ transceivers and DSPs in 10G/25G line cards where EMI must comply with CISPR 22 Class B limits. IC Role / Device Role: Primary POL regulator with integrated MOSFETs, Silent Switcher® EMI reduction, and PGOOD monitoring for hot-swap sequencing. Use Value: Achieves <30dB lower radiated emissions than non-Silent Switcher alternatives, enabling compliance without shielding or ferrite beads - reducing board area by 15%. | Use Scenario: Delivering tightly regulated 0.85V core voltage to Xilinx Kintex Ultrascale+ FPGAs in industrial PLCs with rapid load transients up to 4.5A/µs. IC Role / Device Role: High-bandwidth synchronous buck with 22ns min on-time, forced continuous mode, and internal compensation for fast transient recovery. Use Value: Maintains <±15mV output deviation during 0.1A→4.5A load steps (1µs edge), eliminating need for external active droop or feedforward circuits. |
| Automotive ADAS Camera Module | Battery-Powered Test Equipment |
Use Scenario: Generating 3.3V/2A and 1.8V/1.5A rails from 5V automotive bus for image sensor and ISP in rear-view camera systems operating at 125°C ambient. IC Role / Device Role: AEC-Q100 H-grade buck converter with thermal shutdown (165°C), overvoltage protection, and robust start-up under cold-crank (2.25V VIN). Use Value: Guarantees uninterrupted operation across full automotive temperature range without derating - validated to 150°C junction with 100% production test coverage. | Use Scenario: Powering handheld oscilloscope front-end ADCs and amplifiers from two-cell Li-ion (6.4V max), requiring ultra-low standby current and precise 2.5V reference rail. IC Role / Device Role: Dual-mode regulator using Burst Mode™ for <40µA IQ during idle, and forced continuous for low-noise measurement periods. Use Value: Extends battery runtime by 3.2× vs fixed-frequency alternatives at 100µA load, while maintaining <20µVRMS output noise in active mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3307EDD#TRPBF | 3A output, same 2mm × 2mm LQFN package but no AEC-Q100 qualification; 35mΩ/65mΩ RDS(ON); fixed 2MHz frequency. | Lower current capacity and thermal rating (125°C max); not suitable for automotive under-hood use. | Select when cost-sensitive, lower-current (<3A) industrial applications require identical footprint and layout reuse. |
| TPS546B24RVFT | 6A, 2.7–16V input, PMBus interface, 0.5% accuracy; larger 4mm × 4mm QFN; requires external compensation. | Wider VIN range and digital control, but higher solution size and complexity; lacks Silent Switcher EMI performance. | Select when system-level telemetry, margining, or dynamic voltage scaling via PMBus is required - not for EMI-critical or space-constrained designs. |
Compared with LTC3307EDD#TRPBF and TPS546B24RVFT, the LTC3309AHV#TRPBF uniquely combines AEC-Q100 H-grade reliability, Silent Switcher® EMI suppression, and 22ns minimum on-time in a 2mm × 2mm footprint - making it the only choice for compact, high-reliability, low-emission 6A POL in automotive and optical infrastructure.
Availability
LTC3309AHV#TRPBF is available at Aetrix Electronics and suitable for optical networking, automotive ADAS, and FPGA power delivery applications requiring stable component supply, AEC-Q100 compliance, and ultralow EMI performance.
Supply support for LTC3309AHV#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 LTC3309A product line delivers highly integrated, low-EMI, high-efficiency DC/DC converters for space-constrained, noise-sensitive point-of-load applications - designed specifically for optical transceivers, automotive vision systems, and high-speed digital logic cores.
FAQ
What is the maximum junction temperature rating for the LTC3309AHV#TRPBF?
The LTC3309AHV#TRPBF is rated for a maximum junction temperature of +150°C and is qualified per AEC-Q100 for automotive applications. Its overtemperature protection activates at approximately 165°C (typical), shutting down the device until the die cools to ~160°C. This H-grade rating distinguishes it from standard-grade variants like the LTC3309AEV#TRPBF (125°C max), making the LTC3309AHV#TRPBF suitable for under-hood automotive environments and high-power-density industrial modules.
Does the LTC3309AHV#TRPBF support external clock synchronization, and what is the valid frequency range?
Yes, the LTC3309AHV#TRPBF supports external clock synchronization via the MODE/SYNC pin, accepting square-wave inputs from 1MHz to 3MHz. During synchronization, the device operates exclusively in forced continuous mode, and its internal slope compensation automatically adapts to the external frequency. The PLL locks within microseconds, and removal of the external clock is detected within ~10µs, after which the oscillator smoothly transitions back to the RT-programmed frequency. This capability enables deterministic timing alignment across multi-rail power systems.
How does the LTC3309AHV#TRPBF achieve ultralow EMI, and is external filtering required?
The LTC3309AHV#TRPBF achieves ultralow EMI through Analog Devices' patented Silent Switcher® architecture - featuring symmetrical, balanced internal power switch layouts and integrated input capacitors that cancel magnetic fields. Measured radiated emissions are >30dB below CISPR 22 Class B limits without shielding or ferrite beads. While external LC filters are optional for extreme EMI margins, the LTC3309AHV#TRPBF is designed to meet stringent EMC requirements with only standard input/output ceramic capacitors and proper PCB layout - significantly simplifying compliance testing.
What protection features are integrated into the LTC3309AHV#TRPBF?
The LTC3309AHV#TRPBF integrates output overvoltage protection (107–114% VOUT threshold), short-circuit recovery via valley current limiting (IVALLEYMAX = 7.8A), thermal shutdown (165°C), input UVLO (2.1V rising), and PGOOD fault reporting with 120µs delay and hysteresis. It also tolerates inductor saturation during overload and supports safe dropout operation down to 100% duty cycle. These protections operate autonomously without external components, ensuring robust operation in unattended systems like remote telecom nodes and automotive ECUs.
Can the LTC3309AHV#TRPBF be used in battery-powered systems with strict quiescent current requirements?
Yes, the LTC3309AHV#TRPBF is optimized for battery-powered systems: it draws only 40µA quiescent current in Burst Mode™ sleep state while maintaining regulation, and features a precision 400mV enable threshold with 50mV hysteresis for controlled wake-up sequencing. Its ability to sustain >85% efficiency at 100µA load - combined with low-noise operation and automatic mode transition - makes the LTC3309AHV#TRPBF ideal for portable medical monitors, handheld test gear, and always-on IoT sensors where runtime and signal integrity are critical.
LTC3309AHV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®1
- Package/Case:
- 12-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 2.25V
- Current - Output:
- 6A
- Frequency - Switching:
- Up to 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3309AHV#TRPBF FAQ
1.How can I place an order for LTC3309AHV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3309AHV#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 LTC3309AHV#TRPBF reliable?
The price and inventory of LTC3309AHV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3309AHV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3309AHV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3309AHV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3309AHV#TRPBF?
LTC3309AHV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3309AHV#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 LTC3309AHV#TRPBF?
For technical support, including LTC3309AHV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3309AHV#TRPBF requirements.
6.How does Aetrix verify that LTC3309AHV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3309AHV#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 LTC3309AHV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3309AHV#TRPBF?
All LTC3309AHV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3309AHV#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 LTC3309AHV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3309AHV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3309AHV#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…
