All trademarks are the property of their respective owners.
DescriptionThe LM5161QPWPRQ1 is a 100-V, 1-A synchronous step-down converter with integrated high-sideand low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation andsupports high step-down ratios with fast transient response. An internal feedback amplifiermaintains ±1% output voltage regulation over the entire operating temperature range. The ON-timevaries inversely with input voltage resulting in nearly constant switching frequency. Peak andvalley current limit circuits protect against overload conditions. The under-voltage lockout(EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis.The FPWM input pin in LM5161QPWPRQ1 selects either the forced continuous conduction mode (CCM) underall load levels or the discontinuous conduction mode (DCM) under light or no load conditions. Whenoperating in forced CCM, the LM5161QPWPRQ1 supports the multiple output and isolated Fly-Buckapplications. When programmed for the DCM operation, the LM5161QPWPRQ1 provides a tightly regulatedbuck output without any additional external feedback ripple injection circuit.
Feature
- Qualified for Automotive Applications
- AEC-Q100Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to 125°C Ambient Operating TemperatureRange
- Device HBM ESD Classification Level 2
- Device CDM ESDClassification Level C5
- Wide 4.5-V to 100-V InputVoltage Range
- Integrated High-Side and Low-Side Switches
- No Schottky Diode Required
- 1-A Maximum Load Current
- Constant ON-Time Control
- No External Loop Compensation
- Fast Transient Response
- Selectable DCM Buck Operation at Light Load
- CCM OptionSupports Multi-Output Fly-Buck?
- No External Ripple circuit needed (at FPWM =0)
- Nearly Constant Switching Frequency
- Frequency Adjustable Up to 1 MHz
- Programmable Soft-Start Time
- Prebias Start-Up
- Peak Current Limiting Protection
- Adjustable Input UVLO and Hysteresis
- ±1% Feedback Voltage Reference
- Thermal Shutdown Protection
- Create a Custom Design Using the LM5161-Q1 With theWEBENCH? PowerDesigner
All trademarks are the property of their respective owners.
DescriptionThe LM5161-Q1 is a 100-V, 1-A synchronous step-down converter with integrated high-sideand low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation andsupports high step-down ratios with fast transient response. An internal feedback amplifiermaintains ±1% output voltage regulation over the entire operating temperature range. The ON-timevaries inversely with input voltage resulting in nearly constant switching frequency. Peak andvalley current limit circuits protect against overload conditions. The under-voltage lockout(EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis.The FPWM input pin in LM5161-Q1 selects either the forced continuous conduction mode (CCM) underall load levels or the discontinuous conduction mode (DCM) under light or no load conditions. Whenoperating in forced CCM, the LM5161-Q1 supports the multiple output and isolated Fly-Buckapplications. When programmed for the DCM operation, the LM5161-Q1 provides a tightly regulatedbuck output without any additional external feedback ripple injection circuit.
