LTC3605AIUF#TRPBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LTC3605AIUF#TRPBF is a 4 V to 20 V input, 5 A synchronous step-down switching regulator supporting PolyPhase operation for reduced ripple in a 24-pin QFN package. Available in stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- LTC3605AIUF#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $6.8500(MOQ 19)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 V to 20 V input range with 5 A output current capability supporting 12 V nominal bus applications
- PolyPhase synchronous step-down architecture reduces input and output ripple current, enabling smaller filter capacitors
- Constant-frequency current-mode control provides fast transient response and simple loop compensation
- Compact 24-pin QFN package (JESD-30 S-PQCC-N24) with exposed pad for efficient thermal dissipation on PCB
Applications
The LTC3605AIUF#TRPBF is used in point-of-load power conversion for FPGAs, DSPs, and multi-core processors in telecommunications infrastructure and industrial automation systems requiring a stable low-voltage rail from a 12 V or 14 V bus. Its PolyPhase capability allows two LTC3605 devices to operate interleaved at 180 degrees, cutting effective ripple frequency in half and reducing output capacitance requirements by up to 50%. The wide 4 V to 20 V input range also makes it suitable for battery-powered portable instrumentation and distributed power architectures in embedded computing modules.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1697 |
| YTEOL | 10 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | CONSTANT FREQUENCY |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 4V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PQCC-N24 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 7.5A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 4000kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range and output current can the LTC3605AIUF#TRPBF deliver in a point-of-load design?
The LTC3605AIUF#TRPBF accepts an input voltage from 4 V to 20 V and delivers up to 5 A of continuous output current, making it suitable for powering FPGAs, DSPs, and microprocessors from a 12 V intermediate bus. The 20 V maximum input provides margin for transient spikes in industrial 14 V to 16 V power systems.
How does the PolyPhase feature of the LTC3605AIUF#TRPBF benefit multi-phase power supply designs?
The LTC3605AIUF#TRPBF supports PolyPhase operation by allowing two or more regulators to run interleaved 180 degrees out of phase, which reduces peak input current ripple and lowers RMS current stress on input capacitors. This allows designers to use smaller ceramic capacitors, cutting total BOM size and cost for 5 A to 10 A loads in FPGA and processor power supply designs.
Which package does LTC3605AIUF#TRPBF use and how does the exposed pad aid thermal performance?
The LTC3605AIUF#TRPBF is packaged in a 24-pin QFN (JESD-30 code S-PQCC-N24) with an exposed thermal pad on the underside. The exposed pad is soldered directly to the PCB ground plane, providing a low thermal resistance path that allows the device to dissipate heat at 5 A output currents without requiring an external heatsink in most industrial temperature applications.
When would LTC3605AIUF#TRPBF be preferred over a single-phase buck converter for a 5 A load?
The LTC3605AIUF#TRPBF is preferred over a simple single-phase buck when ripple current reduction and output capacitor count matter, specifically in noise-sensitive analog or RF circuits supplied from a noisy 12 V rail. Running two LTC3605 devices in PolyPhase at 180 degrees doubles the effective switching frequency at the output filter, reducing output voltage ripple below 10 mV peak-to-peak with fewer bulk capacitors than a single-phase design.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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