ZHCSES0C March 2016 – December 2022 LM5165-Q1
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Integrated Power MOSFETs
- 7.3.2 Selectable PFM or COT Mode Converter Operation
- 7.3.3 COT Mode Light-Load Operation
- 7.3.4 Low Dropout Operation and 100% Duty Cycle Mode
- 7.3.5 Adjustable Output Voltage (FB)
- 7.3.6 Adjustable Current Limit
- 7.3.7 Precision Enable (EN) and Hysteresis (HYS)
- 7.3.8 Power Good (PGOOD)
- 7.3.9 Configurable Soft Start (SS)
- 7.3.10 Thermal Shutdown
- 7.4 Device Functional Modes
-
8 Applications and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1 Design 1: Wide VIN, Low IQ COT Converter Rated at 5 V, 150 mA
- 8.2.2 Design 2: Small Solution Size PFM Converter Rated at 3.3 V, 50 mA
- 8.2.3 Design 3: High Density 12-V, 75-mA PFM Converter
- 8.2.4 Design 4: 3.3-V, 150-mA COT Converter With High Efficiency
- 8.2.5 Design 5: 15-V, 150-mA, 600-kHz COT Converter
- 8.3 Power Supply Recommendations
- 8.4 Layout
- 9 Device and Documentation Support
- 10Mechanical, Packaging, and Orderable Information
封裝選項
機械數據 (封裝 | 引腳)
散熱焊盤機械數據 (封裝 | 引腳)
- DRC|10
訂購信息
8.2.3.2.5 Undervoltage Lockout Setpoint – RUV1, RUV2, RHYS
Adjust the undervoltage lockout (UVLO) using an externally-connected resistor divider network of RUV1, RUV2, and RHYS. The UVLO has two thresholds, one for power up when the input voltage is rising and one for power down or brownouts when the input voltage is falling. The EN rising threshold for the LM5165-Q1 is 1.212 V.
Rearranging Equation 6 and Equation 7, the expressions to calculate RUV2 and RHYS are as follows:
Choose RUV1 as 10 M? to minimize input quiescent current. Given the desired input voltage UVLO thresholds of 16 V and 14.5 V, calculate the resistance of RUV2 and RHYS as 825 k? and 37.4 k?, respectively. See Section 7.3.7 for more detail.