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Analog Devices Inc. LTC3307BHV#TRMPBF
- Part No.:
- LTC3307BHV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3307BHV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 2A/2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC3307BHV#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 3A output at 500mV–VIN, operating from 2.25V–5.5V input with 6.6MHz default switching frequency, 22ns minimum on-time, and Silent Switcher architecture for ultralow EMI in automotive-grade (–40°C to +150°C) applications such as FPGA core supplies and distributed POL systems.
For engineers reviewing the LTC3307BHV#TRMPBF datasheet, LTC3307BHV#TRMPBF pinout, LTC3307BHV#TRMPBF application, or LTC3307BHV#TRMPBF equivalent, key selection criteria include its AEC-Q100 qualification, forced continuous/pulse-skipping/Burst Mode operation, 0.5V feedback reference, 100% duty-cycle capability, and thermal performance in the 2mm × 2mm LQFN package with exposed PGND pad.
Technical Context
The LTC3307BHV#TRMPBF uses constant-frequency peak current mode control with internal compensation, enabling fast transient response and stable regulation across 3MHz–10MHz programmable switching frequencies. Its architecture integrates high-side (31mΩ) and low-side (8mΩ) MOSFETs, supports clock synchronization via MODE/SYNC, and features automatic slope compensation adaptation during external sync.
It implements three distinct light-load modes: pulse-skipping (MODE/SYNC grounded), forced continuous (MODE/SYNC floating), and Burst Mode (MODE/SYNC tied to VIN), each with defined quiescent currents (40µA in Burst Mode sleep), overvoltage protection (110% VOUT threshold), and power-good monitoring with 120µs delay and ±1% output accuracy over temperature.
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 direct core supply for modern FPGAs and ASICs down to sub-1V logic domains. |
| Max Output Current | 3A continuous - sustained delivery under thermal limits in 2mm × 2mm LQFN with θJA = 51°C/W. |
| Switching Frequency | 3MHz to 10MHz - programmable via RT resistor or external SYNC signal; default 6.6MHz enables compact 220nH inductor use. |
| Feedback Voltage | 0.5V ±1% - precision reference allows tight output regulation with standard 0.1% resistors in FB divider. |
| Min On-Time | 22ns - enables high step-down ratios (e.g., 5.5V→0.5V) at 10MHz without pulse skipping. |
| Quiescent Current | 40µA in Burst Mode sleep - extends battery life in always-on IoT and telematics modules. |
| Thermal Rating | Junction range –40°C to +150°C - qualified per AEC-Q100 Grade H for under-hood automotive power rails. |
Pinout & Package
The LTC3307BHV#TRMPBF 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 and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (1) | Analog ground reference | Remote sense return for FB; must connect directly to output capacitor negative terminal to reject PCB IR drop. |
| EN (2) | Enable control input | 400mV precision threshold with hysteresis; enables power-up sequencing from another rail's output. |
| VIN (3,8) | Main power input | Dual pins reduce trace inductance; bypass separately to PGND and AGND with low-ESR ceramics. |
| PGND (4,7,13) | Power ground return | Exposed pad (Pin 13) is primary thermal path; requires ≥6 vias to inner ground plane for θJB = 12°C/W. |
| SW (5,6) | Switch node | High di/dt node; must be routed as short/wide copper pour to inductor to minimize EMI and ringing. |
| MODE/SYNC (9) | Mode select / clock input | Configures light-load behavior (pulse-skip/Burst/forced continuous) or accepts 3–10MHz external clock. |
| RT (10) | Frequency programming | Resistor to AGND sets fSW from 3–10MHz; open or tied to VIN selects default 6.6MHz. |
| PGOOD (11) | Power status indicator | Open-drain output asserts low if VOUT <97% or >110% of target, or during shutdown/UVLO/thermal fault. |
| FB (12) | Feedback input | Regulates voltage by holding at 0.5V; connects to mid-point of resistor divider between VOUT and AGND. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces radiated EMI by >20dB vs conventional buck converters, eliminating need for metal shielding in space-constrained modules. |
| Low ripple Burst Mode® | Delivers 40µA IQ at light loads while maintaining <10mVpp output ripple-critical for noise-sensitive RF and sensor subsystems. |
| 100% duty-cycle operation | Enables dropout operation down to VIN – VOUT ≈ ILOAD × RDS(ON)_PMOS, supporting ultra-low headroom applications like post-regulation of buck-boost outputs. |
| AEC-Q100 Grade H qualification | Validated for automotive under-hood environments with guaranteed operation from –40°C to +150°C junction temperature. |
| Internal compensation | Eliminates external compensation network, reducing BOM count and layout sensitivity while maintaining stability across 1–10µF output capacitors. |
| Inductor saturation tolerance | Safely handles temporary inductor saturation during overload without latch-up or damage, simplifying magnetics selection for cost-sensitive designs. |
Applications
| Automotive ADAS Power Rail | FPGA Core Supply |
|---|---|
Use Scenario: Powering image signal processors and radar SoCs in front-camera modules where EMI must comply with CISPR 25 Class 5 limits. IC Role / Device Role / Timing Role: Primary 1.2V/3A POL regulator with synchronized switching to avoid beat frequencies with camera pixel clocks. Use Value: Silent Switcher architecture achieves <15µV/m radiated emissions at 100MHz, eliminating shielded inductors and saving 12mm² PCB area. | Use Scenario: Delivering tightly regulated 0.85V core voltage to Xilinx Zynq UltraScale+ MPSoC in industrial control gateways. IC Role / Device Role / Timing Role: High-bandwidth step-down converter with 22ns min-on-time enabling 10MHz operation for fast load-step response (<5µs to settle within ±2% error). Use Value: Achieves 92% efficiency at 3A/0.85V from 3.3V input, reducing thermal load by 1.8W vs legacy 3MHz solutions. |
| Distributed Telecom POL | Optical Transceiver Bias |
Use Scenario: Local regulation for 12.5Gbps SFP+ modules in 5G baseband units where board space is constrained and thermal dissipation is limited. IC Role / Device Role / Timing Role: Compact 2mm × 2mm point-of-load converter replacing discrete controller + MOSFET solutions. Use Value: 6.6MHz operation allows use of 220nH inductor (MURATA DFE18SAN-R24M-G0), cutting solution size by 40% vs 2MHz alternatives. | Use Scenario: Providing low-noise 3.3V bias to laser driver ICs in coherent optical modules where supply ripple directly impacts extinction ratio. IC Role / Device Role / Timing Role: Low-ripple regulator operating in forced continuous mode to suppress switching artifacts near 10GHz RF bands. Use Value: <5mVpp output ripple in forced continuous mode eliminates need for additional LC filtering, preserving signal integrity. |
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 |
|---|---|---|---|
| LTC3308HV#TRMPBF | 4A rated, identical pinout and feature set; higher current capability with same 2mm × 2mm footprint. | Better suited for higher-current FPGA I/O banks or multi-core SoCs requiring >3A. | Select when design margin or future scalability demands >3A continuous output without layout change. |
| TPS62864ARGRR | 3A, 2.5V–5.5V input, 1.8V–3.3V fixed-output variants only; no programmable VOUT or RT pin. | Limited to fixed-output applications; lacks Burst Mode, SYNC, and AEC-Q100 qualification. | Consider only for cost-sensitive consumer applications where automotive temp grade and full feature set are unnecessary. |
Compared with LTC3308HV#TRMPBF, the LTC3307BHV#TRMPBF offers identical thermal and EMI performance in a lower-current, potentially lower-cost variant; versus TPS62864ARGRR, it provides full programmability, automotive qualification, and superior light-load efficiency-making it the preferred choice for mission-critical embedded systems.
Availability
LTC3307BHV#TRMPBF is available at Aetrix Electronics and suitable for automotive ADAS, FPGA core supplies, distributed telecom POL, optical transceiver bias, and industrial control applications requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3307BHV#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 precision instrumentation, communications, and automotive markets since 1965.
The LTC3307BHV#TRMPBF belongs to Analog Devices' Silent Switcher DC/DC converter product line, engineered specifically for EMI-sensitive, space-constrained, and high-reliability applications including automotive, optical networking, and industrial edge computing.
FAQ
What is the maximum junction temperature rating for the LTC3307BHV#TRMPBF?
The LTC3307BHV#TRMPBF is rated for operation up to +150°C junction temperature and is qualified per AEC-Q100 Grade H. Its thermal shutdown activates at ~165°C (typical), with recovery at ~160°C. The 2mm × 2mm LQFN package achieves θJA = 51°C/W on a standard JEDEC 2S2P board, enabling 3A operation at +85°C ambient with appropriate PCB copper area.
How does the MODE/SYNC pin configure light-load operation on the LTC3307BHV#TRMPBF?
The MODE/SYNC pin on the LTC3307BHV#TRMPBF selects among three light-load modes: grounding enables pulse-skipping mode; tying to VIN enables low-ripple Burst Mode® with 40µA IQ; floating enables forced continuous mode for lowest output ripple and fixed-frequency operation. During external clock synchronization (3–10MHz square wave), the part operates exclusively in forced continuous mode with auto-adapted slope compensation.
Can the LTC3307BHV#TRMPBF operate with an input voltage below 2.5V?
Yes, the LTC3307BHV#TRMPBF supports input voltages as low as 2.25V. At low VIN, RDS(ON) of the internal PMOS increases, raising conduction losses-designers should verify junction temperature using TJ = TA + (PD × θJA). The 22ns minimum on-time ensures stable regulation even at 2.25V input when generating low VOUT (e.g., 0.5V at 10MHz).
What is the purpose of the AGND pin on the LTC3307BHV#TRMPBF, and how should it be connected?
The AGND pin on the LTC3307BHV#TRMPBF serves as both the remote output voltage sense return and the analog ground reference for internal circuitry. It must be connected directly to the negative terminal of the output capacitor at the load-not to the PGND plane-to reject PCB trace resistance and ensure accurate regulation. All FB and RT connections must also reference AGND, not PGND.
Does the LTC3307BHV#TRMPBF require external compensation components?
No, the LTC3307BHV#TRMPBF features fully internal compensation, eliminating the need for external Type II or Type III compensation networks. This reduces bill-of-materials count, simplifies layout, and ensures stability across recommended output capacitor ranges (10µF–47µF ceramic). The internal loop is optimized for use with standard low-ESR MLCCs and does not require additional phase-lead capacitors unless extreme transient performance is needed.
LTC3307BHV#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:
- 2A, 2A
- Frequency - Switching:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3307BHV#TRMPBF FAQ
1.How can I place an order for LTC3307BHV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3307BHV#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 LTC3307BHV#TRMPBF reliable?
The price and inventory of LTC3307BHV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3307BHV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3307BHV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3307BHV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3307BHV#TRMPBF?
LTC3307BHV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3307BHV#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 LTC3307BHV#TRMPBF?
For technical support, including LTC3307BHV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3307BHV#TRMPBF requirements.
6.How does Aetrix verify that LTC3307BHV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3307BHV#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 LTC3307BHV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3307BHV#TRMPBF?
All LTC3307BHV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3307BHV#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 LTC3307BHV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3307BHV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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