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微源半导体 LP6453M SOT23-6(FC) 18V/3A同步BUCK开关变换器
General Description
The LP6453M is a high efficiency synchronous buck converter supporting up to 3A output current and low heat.
The LP6453M employs an adaptive constant-on-time (COT) control scheme to achieve fast load transient response and without external compensation. The external components are minimized, requiring only one inductor, two resistors, and two capacitors.
The LP6453M supports both aluminum polymer capacitors and ceramic capacitors without extra compensation components.
The LP6453M integrates PFM (Pulse Frequency Modulation) operation, which helps maintain the system efficiency at light load. LP6453M 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 33-mΩ LS-MOSFET and an 55-mΩ HSMOSFET
- 92% efficiency at 3A load from 12V to 5V conversion
● Constant-on time (COT) control with fast transient response.
● ±1% Vref accuracy
● Typical 1.2-MHz switching frequency
● Startup from Pre-biased output voltage
● 1.0ms typical soft-start time
● Integrated UVLO, OVP, OCP, SCP, and OTP protections
● 1.6mm x 2.9mm SOT23-6 package and 1.6mm x 1.6mm SOT563 package
● RoHS Compliant and 100.00% Lead (Pb) Free
Applications
● Industrial PC
● Network/digital video recorder (NVR/DVR)
● TV and TV box
● 12V Industrial bus applications
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