My Inquiry
My Account
Analog Devices Inc. LTC3309BHV#TRMPBF
- Part No.:
- LTC3309BHV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3309BHV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 6A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:735
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3309BHV#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 6A output current, operating from 2.25V–5.5V input and regulating down to 0.5V with ±1% accuracy. It features Silent Switcher architecture for ultralow EMI, 22ns minimum on-time for fast transient response, and supports forced continuous, pulse-skip, or low-ripple Burst Mode operation - ideal for space-constrained, noise-sensitive automotive power rails.
For engineers reviewing the LTC3309BHV#TRMPBF datasheet, LTC3309BHV#TRMPBF pinout, LTC3309BHV#TRMPBF application, or LTC3309BHV#TRMPBF equivalent, key selection factors include its 2mm × 2mm LQFN package with exposed PGND pad, AEC-Q100 qualification for automotive use, 3MHz–10MHz programmable switching frequency, and integrated overvoltage, short-circuit, and thermal protection.
Technical Context
The LTC3309BHV#TRMPBF uses constant-frequency peak current mode control with internal compensation, enabling stable regulation without external loop components. Its 22ns minimum on-time and 100% duty cycle capability support high VIN-to-VOUT ratios and low-dropout operation under heavy load.
Silent Switcher architecture employs symmetrical layout and integrated bypass capacitors to suppress common-mode EMI, while the MODE/SYNC pin enables dynamic selection among three operating modes - forced continuous (low ripple), pulse skip (low noise), or Burst Mode (40µA IQ at light load) - each with distinct trade-offs in efficiency, noise, and transient response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and automotive 3.3V/5V rails with robust UVLO hysteresis. |
| IOUT Max | 6A continuous - sufficient for FPGA core, ASIC I/O, or microprocessor VDD supplies in compact POL applications. |
| VOUT Accuracy | ±1% over temperature - ensures stable logic-level compliance for 0.5V–5.5V outputs without calibration. |
| Switching Frequency | 3MHz–10MHz (programmable via RT or SYNC) - enables sub-1mm inductors and rapid load-step response. |
| Min On-Time | 22ns - allows high-frequency operation even at low VOUT/VIN ratios (e.g., 1.8V out from 2.5V in). |
| Thermal Rating | Junction temp range –40°C to +150°C - qualified for under-hood automotive environments per AEC-Q100 Grade H. |
| Quiescent Current | 40µA in Burst Mode sleep - extends battery runtime in always-on vehicle subsystems. |
Pinout & Package
The LTC3309BHV#TRMPBF is housed in a thermally enhanced 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed PGND pad (Pin 13), requiring soldering to PCB ground plane for optimal thermal performance (θJA = 51°C/W, θJB = 12°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (1) | Analog ground reference | Remote output voltage sense return; must connect directly to output capacitor negative terminal to minimize load regulation error. |
| EN (2) | Enable control input | 400mV precision threshold with hysteresis; enables power-up sequencing when driven by upstream regulator feedback divider. |
| VIN (3, 8) | Main input power supply | Dual pins reduce IR drop and inductance; require parallel wide traces and local ceramic bypass to AGND/PGND. |
| PGND (4, 7, 13) | Power ground return | Primary return path for bottom switch; exposed pad (Pin 13) is mandatory thermal and electrical connection to PCB ground plane. |
| SW (5, 6) | Switch node | High dv/dt node connecting internal FETs to external inductor; must be routed as short/wide copper to minimize EMI and ringing. |
| MODE/SYNC (9) | Mode selection & clock sync | Configures operation mode (pulse skip/forced continuous/Burst) or accepts 3–10MHz external clock for EMI reduction via synchronization. |
| RT (10) | Frequency programming | Resistor-to-AGND sets switching frequency from 3–10MHz; open or tied to VIN selects default 6.6MHz. |
| PGOOD (11) | Power good indicator | Open-drain output asserting high when VOUT is within –2%/+10% of regulation; includes 120µs delay and OV/UV fault detection. |
| FB (12) | Feedback input | Regulates VOUT by sensing 0.5V reference; connects to resistor divider between VOUT and AGND for precise output setting. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher architecture | Reduces radiated EMI by >20dB vs conventional buck converters, eliminating need for ferrite beads or shielding cans in automotive modules. |
| Low-ripple Burst Mode | Delivers 40µA quiescent current with <10mVpp output ripple at light loads - critical for RF-sensitive infotainment and ADAS sensor power rails. |
| 100% duty cycle operation | Enables dropout operation down to VIN ≈ VOUT + (IOUT × RDS(ON)_PMOS), supporting brownout resilience in start-stop engine scenarios. |
| AEC-Q100 Grade H qualification | Validated for –40°C to +150°C junction operation with full reliability testing - suitable for transmission control units and body electronics. |
| Integrated protection suite | Includes output overvoltage lockout (110% threshold), valley-current limiting, thermal shutdown (165°C trip), and soft-start (0.25–3ms) to prevent inrush damage. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering SoC cores and DDR memory in head-unit systems with strict EMC limits and thermal constraints. IC Role / Device Role / Timing Role: Primary 1.1V/1.8V/3.3V POL regulator delivering up to 6A with synchronized switching to avoid beat frequencies with display clocks. Use Value: Silent Switcher EMI suppression meets CISPR 25 Class 5 requirements without added filtering; 2mm × 2mm footprint saves board area in congested dash layouts. | Use Scenario: Providing clean, low-noise 1.2V core and 2.8V sensor bias for CMOS image sensors in surround-view cameras. IC Role / Device Role / Timing Role: Dual-output-capable (with external divider) step-down regulator operating in Burst Mode during vehicle sleep to maintain <50µA system standby current. Use Value: 40µA IQ and ±1% VOUT accuracy ensure consistent image quality across temperature; AEC-Q100 H-grade guarantees reliability at under-hood temperatures. |
| Automotive Telematics Gateway | Electric Power Steering (EPS) MCU Supply |
Use Scenario: Generating isolated 3.3V and 5V rails for cellular modem, GNSS receiver, and CAN transceivers in telematics control units. IC Role / Device Role / Timing Role: High-efficiency synchronous buck supplying 6A peak to LTE modems during data bursts, synchronized to baseband clock to suppress conducted noise. Use Value: 3–10MHz programmable frequency avoids interference bands; 22ns min on-time supports 3.3V output from 4.5V battery during cold-crank conditions. | Use Scenario: Delivering fault-tolerant 1.2V core power to safety-critical EPS microcontrollers with ASIL-B compliance requirements. IC Role / Device Role / Timing Role: Redundant POL regulator with PGOOD monitoring, overvoltage protection, and thermal shutdown feeding MCU VDD pins. Use Value: Integrated OVP (110% threshold) and valley-current limiting prevent latch-up during motor back-EMF transients; –40°C to +150°C rating covers full EPS operating envelope. |
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 |
|---|---|---|---|
| TPS6286418RTER | 4A max output, 2.7V–6V input, 1.8V fixed output; no MODE/SYNC pin; lower thermal rating (–40°C to +125°C). | Not AEC-Q100 qualified; lacks Burst Mode and external sync capability - unsuitable for automotive EMI-critical or ultra-low-IQ designs. | Select only for non-automotive industrial applications where 4A suffices and EMI is less constrained. |
| MAX20404ATCA/VY+ | 6A output, 2.5V–5.5V input, 0.5V–5.5V adjustable; includes spread-spectrum clocking but no Silent Switcher; 3mm × 3mm package. | Higher EMI emissions require additional filtering; larger footprint increases board cost - less optimal for space-limited automotive modules. | Consider when spread-spectrum is preferred over Silent Switcher, or when pin compatibility with MAX20404-based designs is required. |
Compared with TPS6286418RTER and MAX20404ATCA/VY+, the LTC3309BHV#TRMPBF uniquely combines AEC-Q100 Grade H qualification, 2mm × 2mm size, Silent Switcher EMI reduction, and 40µA Burst Mode IQ - making it the only choice for compact, high-reliability automotive POL where thermal, noise, and footprint are simultaneously constrained.
Availability
LTC3309BHV#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, telematics gateways, and electric power steering systems requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for LTC3309BHV#TRMPBF 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 automotive, industrial, communications, and healthcare markets with precision power, signal chain, and RF solutions.
The LTC3309BHV#TRMPBF belongs to Analog Devices' Silent Switcher µModule and monolithic DC/DC converter product line, engineered specifically for automotive-grade point-of-load regulation where ultra-low EMI, small size, and high reliability are mandatory.
FAQ
What is the maximum junction temperature rating for the LTC3309BHV#TRMPBF?
The LTC3309BHV#TRMPBF is rated for operation from –40°C to +150°C junction temperature and is AEC-Q100 qualified for automotive Grade H applications. Thermal shutdown activates at approximately 165°C, with recovery at ~160°C. Its 2mm × 2mm LQFN package with exposed PGND pad achieves θJB = 12°C/W, enabling reliable operation in under-hood environments when properly mounted to a thermal PCB plane.
Does the LTC3309BHV#TRMPBF support external clock synchronization?
Yes, the LTC3309BHV#TRMPBF supports external clock synchronization via its MODE/SYNC pin, accepting square-wave inputs from 3MHz to 10MHz with ≥40ns high/low pulse widths and 0.4V/1.2V logic thresholds. During synchronization, the device operates in forced continuous mode with automatic slope compensation adaptation - a key feature for reducing beat frequencies in multi-rail automotive systems.
How does the LTC3309BHV#TRMPBF achieve ultralow EMI emissions?
The LTC3309BHV#TRMPBF achieves ultralow EMI through Analog Devices' patented Silent Switcher architecture, which integrates symmetrical hot-loop layout, dual independent input paths, and integrated bypass capacitors to cancel magnetic field coupling. This reduces peak radiated emissions by >20dB compared to conventional buck converters - enabling compliance with CISPR 25 Class 5 without external EMI filters or shielding.
What protection features are integrated into the LTC3309BHV#TRMPBF?
The LTC3309BHV#TRMPBF integrates output overvoltage protection (110% threshold), short-circuit protection via valley-current limiting (IVALLEYMAX = 7.8A), thermal shutdown (165°C trip), input UVLO with hysteresis, and PGOOD fault reporting with 120µs delay. These protections operate autonomously without external components, ensuring robust operation in automotive transients and fault conditions.
Can the LTC3309BHV#TRMPBF operate with a 2.25V input supply?
Yes, the LTC3309BHV#TRMPBF is fully specified to operate from 2.25V to 5.5V input. At 2.25V, its 22ns minimum on-time and 100% duty cycle capability allow regulation of outputs as low as 0.5V. However, RDS(ON) of the internal PMOS increases at low VIN, so thermal design must account for higher conduction losses - verified in the datasheet's performance curves at VIN = 2.25V.
LTC3309BHV#TRMPBF 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:
- 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
- Frequency - Switching:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3309BHV#TRMPBF FAQ
1.How can I place an order for LTC3309BHV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3309BHV#TRMPBF 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 LTC3309BHV#TRMPBF reliable?
The price and inventory of LTC3309BHV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3309BHV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3309BHV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3309BHV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3309BHV#TRMPBF?
LTC3309BHV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3309BHV#TRMPBF 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 LTC3309BHV#TRMPBF?
For technical support, including LTC3309BHV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3309BHV#TRMPBF requirements.
6.How does Aetrix verify that LTC3309BHV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3309BHV#TRMPBF 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 LTC3309BHV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3309BHV#TRMPBF?
All LTC3309BHV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3309BHV#TRMPBF, 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 LTC3309BHV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3309BHV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3309BHV#TRMPBF 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…
