LM5160QPWPRQ1

The LM5160-Q1 is a 65-V, 2-A synchronous stepdown converter with integrated high-side and low-side MOSFETs. The adaptive constant on-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The on-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The undervoltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The LM5160-Q1 is programmed through the FPWM pin to operate in continuous conduction mode (CCM) from no load to full load or to automatically switch to discontinuous conduction mode (DCM) at light load for higher efficiency. Forced CCM operation supports multiple-output and isolated Fly-Buck applications using a coupled inductor. The LM5160-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in 14-pin HTSSOP package with 0.65·mm pin pitch.

Applications

• Automotive DC/DC Converter
• IGBT Gate Drive Bias Supply
• Low-Power Isolated DC/DC (Fly-Buck)

Key features

• AEC-Q100 Qualified for Automotive Applications
• Temperature Grade: -40°C ≤ TA ≤ 125°C
• HBM ESD Classification Level 2
• CDM ESD Classification Level C5
• Wide 4.5-V to 65-V Input Voltage Range
• Integrated High-Side and Low-Side Switches
• No External Schottky Diode Required
• 2-A Maximum Load Current
• Meets CISPR 25 EMI Standard
• Adaptive Constant On-Time Control
• No External Loop Compensation
• Fast Transient Response
• Selectable Forced PWM or DCM Operation
• FPWM Supports Multi-Output Fly-Buck™
• Nearly Constant Switching Frequency
• Resistor Adjustable up to 1 MHz
• Programmable Soft-Start Time
• Prebiased Start-Up
• ±1% Feedback Voltage Reference
• Inherent Protection Features for Robust Design
• Peak Current Limiting Protection
• Adjustable Input UVLO and Hysteresis
• VCC and Gate Drive UVLO Protection
• Thermal Shutdown Protection With Hysteresis
• 14-Pin HTSSOP Package, 0.65·mm Pitch
• Create a Custom Design Using the LM5160-Q1 With the WEBENCH® Power Designer