LM25148中文资料具有超低 IQ 的 42V 同步降压直流/直流控制器数据手册TI规格书

描述 Description

The LM25148 is a 42-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25148 can be set up in interleaved mode (paralleled output) with accurate current sharing for high-current applications. It can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM25148 has a unique EMI reduction feature known as dual random spread spectrum (DRSS). Combining low-frequency triangular and high-frequency random modulations mitigates EMI disturbances across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

特性 Features

• Functional Safety-Capable
• Integrated EMI mitigation
• Optimized for CISPR 32 Class B requirements
• Versatile synchronous buck DC/DC controller
• 1% accurate, fixed 3.3-V, 5-V, 12-V, or adjustable output from 0.8 V to 36 V
• Lossless DCR or shunt current sensing
• No-load sleep current: 9.5 µA
• Stackable up to two phases
• Internal bootstrap diode
• Switching frequency from 100 kHz to 2.2 MHz
• Selectable PFM or FPWM modes
• Inherent protection features for robust design
• ENABLE and PGOOD functions
• Internal or external loop compensation
• Create a custom design using the LM25148 with WEBENCH Power Designer