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Analog Devices Inc. LTC3307AMPV#TRMPBF
- Part No.:
- LTC3307AMPV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3307AMPV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 3A 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:211
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Product details
Overview
LTC3307AMPV#TRMPBF from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 3A output current with 2.25V–5.5V input range, 0.5V–VIN output range, ±1% VFB accuracy, and Silent Switcher® architecture for ultralow EMI. It operates in forced continuous, pulse-skipping, or Burst Mode® for optimized efficiency in battery-powered systems, FPGA core supplies, and POL applications.
For engineers reviewing the LTC3307AMPV#TRMPBF datasheet, LTC3307AMPV#TRMPBF pinout, LTC3307AMPV#TRMPBF application, or LTC3307AMPV#TRMPBF equivalent, key selection criteria include its –55°C to +150°C extended temperature grade, 22ns minimum on-time, 1MHz–3MHz programmable switching frequency, and LQFN-12 (2mm × 2mm) thermally enhanced package with exposed PGND pad.
Technical Context
The LTC3307AMPV#TRMPBF uses constant-frequency peak current mode control with internal compensation and supports external clock synchronization via MODE/SYNC pin across 1MHz–3MHz. Its dual-SW topology enables high-current capability while minimizing parasitic inductance, and the integrated 8mΩ NMOS / 31mΩ PMOS power switches deliver high efficiency at light and full load.
It implements three operating modes-forced continuous (low ripple), pulse-skipping (low noise), and Burst Mode® (40µA IQ in sleep)-with automatic mode transition based on load. Output regulation is referenced to a precision 500mV FB threshold, and overvoltage, short-circuit, thermal shutdown, and dropout protection are fully integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and intermediate rail inputs without pre-regulation. |
| VOUT Range | 0.5V to VIN - enables direct 1.2V FPGA core, 0.8V ASIC, or 3.3V I/O supply generation. |
| Output Accuracy | ±1% over temperature - ensures stable voltage under thermal stress in automotive and industrial environments. |
| Switching Frequency | 1MHz to 3MHz (RT-programmable or SYNC-driven) - allows compact magnetics and avoids AM band interference. |
| Min On-Time | 22ns - enables high step-down ratios (e.g., 5V→0.5V at 2MHz) with stable operation. |
| Efficiency (Burst Mode) | 93% @ 1.2V/1A, 3.3VIN, 2MHz - extends battery runtime in portable systems with sub-100µA quiescent current. |
| Thermal Range | –55°C to +150°C - qualified for harsh-environment aerospace, defense, and under-hood automotive use. |
Pinout & Package
Package: 12-lead 2mm × 2mm × 0.74mm LQFN with exposed PGND pad (Pin 13), optimized for low θJA = 51°C/W and robust thermal dissipation in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Remote sense return for FB divider; must connect directly to output capacitor negative terminal to reject PCB IR drop. |
| EN (Pin 2) | Enable control input | 400mV precision threshold with hysteresis; enables sequencing with resistor dividers from upstream rails. |
| VIN (Pins 3, 8) | Main power input | Dual pins reduce trace inductance and IR loss; require local 1µF 0201 ceramic bypass to AGND and PGND. |
| PGND (Pins 4, 7, Exposed Pad 13) | Power ground return | Primary thermal and electrical path for bottom switch; must be soldered to large PCB ground plane with ≥6 vias. |
| SW (Pins 5, 6) | Switch node output | High dv/dt node connecting to inductor; requires short, wide copper pour to minimize EMI and ringing. |
| MODE/SYNC (Pin 9) | Mode selection / clock sync | Configures Burst Mode® (high), pulse-skipping (low), or forced continuous (float); accepts 1–3MHz external clock. |
| RT (Pin 10) | Frequency programming | Resistor-to-AGND sets fSW; open or tied to VIN selects default 2MHz oscillator. |
| PGOOD (Pin 11) | Power-good indicator | Open-drain output asserting high when VOUT is within –2%/+10%; includes 120µs delay and OV/UV fault detection. |
| FB (Pin 12) | Feedback input | Regulates VOUT by holding at 500mV; connects to mid-point of R1/R2 divider; supports feedforward capacitor for transient tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces radiated EMI by >30dB vs conventional buck converters, eliminating need for metal shielding in sensitive RF layouts. |
| 100% duty cycle operation | Enables dropout operation down to VIN – VOUT < 100mV, critical for battery end-of-life support in portable devices. |
| Integrated 8mΩ/31mΩ MOSFETs | Eliminates external power stage, reduces BOM count, and improves efficiency at 3A load without external heatsinking. |
| Burst Mode® with 40µA IQ | Extends battery life in always-on IoT sensors and wearables by maintaining regulation while drawing negligible standby current. |
| Robust protection suite | Includes output overvoltage lockout (>110% VOUT), thermal shutdown (165°C), short-circuit current limiting, and safe inductor saturation tolerance. |
Applications
| Automotive ADAS Camera Module | FPGA Core Power Supply |
|---|---|
Use Scenario: Powering image sensor and ISP SoC in rear-view camera with strict EMI limits and wide ambient temperature swing. IC Role / Device Role / Timing Role: Primary 1.2V/3A POL regulator with Silent Switcher® EMI suppression and –55°C to +150°C operation. Use Value: Meets CISPR-25 Class 5 radiated emissions without shielding, enabling smaller camera housings and lower system cost. |
Use Scenario: Delivering tightly regulated 0.85V core voltage to Xilinx Artix-7 FPGA during dynamic partial reconfiguration. IC Role / Device Role / Timing Role: High-bandwidth, low-noise synchronous buck with 22ns min on-time for fast load transient response. Use Value: Maintains <±1% output stability during 0–3A load steps with <50mV undershoot, preventing configuration errors. |
| Industrial PLC I/O Module | 5G Small Cell Remote Radio Unit |
Use Scenario: Generating isolated 3.3V and 5V rails from 12V backplane in DIN-rail mounted controller with convection cooling only. IC Role / Device Role / Timing Role: High-efficiency, thermally rugged step-down converter operating continuously at 85°C ambient. Use Value: Delivers 94% peak efficiency at full load with no derating up to +125°C junction, reducing thermal management complexity. |
Use Scenario: Powering GaN PA bias and transceiver ICs in outdoor small cell units requiring ultra-low EMI near sensitive RF front-end. IC Role / Device Role / Timing Role: EMI-optimized 2MHz buck with synchronized switching to avoid interference with 5G NR sub-6GHz bands. Use Value: Enables co-location of power and RF sections on same PCB layer without filtering, shrinking RU form factor by 25%. |
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 |
|---|---|---|---|
| TPS62864DLCR | Lower max current (2.5A), narrower VIN (2.7–6V), no Burst Mode®, but offers I2C programmability and higher light-load efficiency (25µA). | Best suited for digitally controlled, space-constrained consumer electronics where firmware configurability outweighs EMI performance. | Select if digital interface and tighter light-load IQ are prioritized over ultralow EMI and extended temperature range. |
| MAX20077ATC+ | AEC-Q100 Grade A (–40°C to +125°C), integrated spread-spectrum, but larger 16-pin 3mm × 3mm TQFN and 2.2A rating. | Targeted at automotive infotainment and body electronics where spread-spectrum is mandated but extreme temp range is not required. | Choose for automotive production programs needing certified AEC-Q100 Grade A compliance and spread-spectrum EMI reduction. |
Compared with TPS62864DLCR and MAX20077ATC+, the LTC3307AMPV#TRMPBF uniquely combines –55°C to +150°C operation, Silent Switcher® EMI performance, and 3A output in a 2mm × 2mm footprint-making it optimal for high-reliability, thermally aggressive, and RF-sensitive applications where alternatives lack either temperature range, EMI margin, or current capability.
Availability
LTC3307AMPV#TRMPBF is available at Aetrix Electronics and suitable for automotive ADAS, industrial PLC, 5G radio unit, and FPGA core power applications requiring stable component supply across extended temperature and long lifecycle commitments.
Supply support for LTC3307AMPV#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3307A product line delivers ultra-compact, high-efficiency, low-EMI DC/DC converters for space- and noise-constrained applications including battery-powered systems, optical networking, and automotive electronics.
FAQ
What is the maximum junction temperature specification for LTC3307AMPV#TRMPBF?
The LTC3307AMPV#TRMPBF is rated for operation up to +150°C junction temperature and guaranteed over –55°C to +150°C, making it suitable for under-hood automotive and high-ambient industrial environments where standard commercial-grade regulators fail.
Does LTC3307AMPV#TRMPBF support external clock synchronization, and what is the valid frequency range?
Yes, LTC3307AMPV#TRMPBF supports external clock synchronization via the MODE/SYNC pin across 1MHz to 3MHz. When synchronized, it operates in forced continuous mode with auto-adapted slope compensation, enabling deterministic timing in multi-rail systems and EMI frequency planning.
How does the Burst Mode® operation of LTC3307AMPV#TRMPBF improve battery life in portable applications?
LTC3307AMPV#TRMPBF achieves 40µA quiescent current in Burst Mode® sleep state, reducing no-load power consumption by >95% versus forced continuous mode. This extends runtime in always-on sensors and wearables where average load is <10mA.
What is the purpose of the AGND pin on LTC3307AMPV#TRMPBF, and how should it be routed?
The AGND pin on LTC3307AMPV#TRMPBF serves as the remote feedback ground reference and analog circuit ground. It must be connected directly to the output capacitor's negative terminal-not to the main PGND plane-to eliminate PCB trace IR drop and ensure ±1% output accuracy under load.
Can LTC3307AMPV#TRMPBF operate with 100% duty cycle, and what design benefit does this provide?
Yes, LTC3307AMPV#TRMPBF supports true 100% duty cycle operation, allowing VOUT regulation even when VIN drops to within ~100mV of the output voltage. This is essential for maintaining system uptime during battery discharge in portable and backup power applications.
LTC3307AMPV#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:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3307AMPV#TRMPBF FAQ
1.How can I place an order for LTC3307AMPV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3307AMPV#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 LTC3307AMPV#TRMPBF reliable?
The price and inventory of LTC3307AMPV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3307AMPV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3307AMPV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3307AMPV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3307AMPV#TRMPBF?
LTC3307AMPV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3307AMPV#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 LTC3307AMPV#TRMPBF?
For technical support, including LTC3307AMPV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3307AMPV#TRMPBF requirements.
6.How does Aetrix verify that LTC3307AMPV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3307AMPV#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 LTC3307AMPV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3307AMPV#TRMPBF?
All LTC3307AMPV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3307AMPV#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 LTC3307AMPV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3307AMPV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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