供应微源LP6450 18V2A同步BUCK开关变换器

微源半导体 LP6450 SOT23-6 18/V2A同步BUCK开关变换器 

General Description

The LP6450 is a synchronous buck converter supporting up to 2A output current. The LP6450X employs an adaptive constant-on-time (COT) control scheme to achieve fast load transient response. The external components are minimized, requiring only one inductor, two resistors, and two capacitors.

The LP6450X supports both aluminum polymer capacitors and ceramic capacitors without extra compensation components.

The LP6450X integrates PFM (Pulse Frequency Modulation) operation, which helps maintain the system efficiency at light load. The LP6450X also integrates multiple protection functions, i.e., over-current protection (OCP), over-temperature protection (OTP), under-voltage lockout (UVLO), and short circuit protection (SCP).

Features

◆ Wide input voltage range: 4.2V – 18V
◆ Output voltage range: Vref – 7V
◆ High efficiency operation
- Integrated an 75-mΩ LS-MOSFET and an 110-mΩ HS-MOSFET
- 90% efficiency at 2A load from 12V to 5V conversion
◆ Automatic PFM mode at light load
◆ ±1% Vref accuracy
◆ Typical 1.2-MHz switching frequency
◆ COT control scheme with fast load transient response
◆ Hiccup protection
◆ Integrated UVLO, OVP, OCP, SCP, and OTP protections
◆ 1.25ms typical soft-start time
◆ 1.6mm Χ 2.9mm SOT23-6 package
◆ RoHS Compliant and 100% Lead (Pb) Free

Applications

◆ Industrial PC
◆ Network/digital video recorder (NVR/DVR)
◆ TV and TV box
◆ 12V Industrial bus applications

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