LM5642XMT/NOPB

Texas Instruments一系列集成降压（降压）直流-直流控制器，用于需要使用外部电源 MOSFET 来实现完整开关调节器设计的应用。### 直流/直流控制器（外部开关），Texas Instruments

DESCRIPON

The LM5642 series consists of two current mode synchronous buck regulator controllers operating 180° out of phase with each other at a normal switching frequency of 200kHz for the LM5642 and at

375kHz for the LM5642X.

FEATURES

• Two Synchronous Buck Regulators

• 180° Out of Phase Operation

• 200 kHz Fixed Nominal Frequency: LM5642

• 375 kHz Fixed Nominal Frequency: LM5642X

• Synchronizable Switching Frequency from 150 kHz to 250 kHz for the LM5642 and 200 kHz to

500 kHz for the LM5642X

• 4.5V to 36V Input Range

• 50 µA Shutdown Current

• Adjustable Output from 1.3V to 90% of Vin

• 0.04% Typical Line and Load Regulation Accuracy

• Current Mode Control with or without a Sense Resistor

• Independent Enable/Soft-start Pins Allow Simple Sequential Startup Configuration.

• Adjustable Cycle-by-cycle Current Limit

• Input Under-voltage Lockout

• Output Over-voltage Latch Protection

• Output Under-voltage Protection with Delay

• Thermal Shutdown

• Self Discharge of Output Capacitors when the Regulator is OFF

• TSSOP and HTSSOP Exposed PAD Packages