LP3669 power supply Switching IC SOP-7

LP3669 Power Supply Switching IC SOP-7 is a compact and efficient step-down (buck) DC-DC converter controller designed for low-voltage, high-current power supply applications. It integrates high-side and low-side MOSFETs, current mode control, and protection features into a single SOP-7 package. Ideal for use in portable devices, industrial systems, and embedded boards that require regulated DC output from higher-voltage sources.

Key Features:

• Integrated high-side and low-side MOSFETs
• Wide input voltage range suitable for 5V to 30V systems
• High efficiency synchronous buck regulator design
• Built-in soft-start, UVLO, and thermal shutdown
• Compact SOP-7 package ideal for space-constrained designs

Technical Specifications:

• Input Voltage Range: 5V to 30V
• Output Voltage: Adjustable from 0.8V to 28V
• Switching Frequency: Up to 500kHz
• Output Current: Up to 3A (with external inductor and proper thermal design)
• Efficiency: Up to 95% depending on load
• Control Method: Peak current mode control
• Protections: Short-circuit, over-temperature, under-voltage lockout
• Package: SOP-7 (Small Outline Package)

Mechanical Specifications:

• Package Type: SOP-7 (Surface-mount)
• Pin Pitch: 1.27mm
• Lead-Free: Yes, RoHS compliant
• Moisture Sensitivity: Level 1 (MSL1)

Dimensions:

• Body Width: 4.90mm
• Body Length: 6.00mm
• Height: 1.50mm max
• Lead Pitch: 1.27mm

Mounting Options:

• Surface-mount compatible (SOP footprint)
• Can be reflow soldered or wave soldered
• Suitable for high-density PCBs

Schematic Diagram, Connection, Wiring and Pinout:

• Pin 1: VIN – Input voltage supply
• Pin 2: GND – Ground
• Pin 3: SW – Switching output to external inductor
• Pin 4: FB – Feedback for voltage regulation
• Pin 5: EN – Enable/disable control
• Pin 6: NC – No connection or reserved
• Pin 7: BST – Bootstrap pin for high-side driver

Datasheet/User Manual:

• LP3669 Buck Converter IC Datasheet
• Reference schematic and application design guide
• Thermal layout and PCB guidelines included

Applications:

• Step-down regulators for microcontroller systems
• Battery-powered and USB-powered devices
• Set-top boxes and network equipment
• Industrial power modules
• Smart home and IoT systems

Equivalent:

• MP2307: 3A step-down converter IC with built-in MOSFETs, SOP-8
• XL4015: 5A adjustable buck converter IC with high efficiency
• LM2596: Popular 3A step-down IC, requires external diode and inductor
• RT8299: High-efficiency synchronous buck converter with internal MOSFETs

Package Includes:

• 1 x LP3669 Power Supply Switching IC SOP-7