ZHCSBK4G March 2013 – March 2019
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 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 Maximum Power Point Tracking
- 7.3.2 Battery Undervoltage Protection
- 7.3.3 Battery Overvoltage Protection
- 7.3.4 Battery Voltage within Operating Range (VBAT_OK Output)
- 7.3.5 Storage Element / Battery Management
- 7.3.6 Programming OUT Regulation Voltage
- 7.3.7 Step Down (Buck) Converter
- 7.3.8 Nano-Power Management and Efficiency
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文档支持
- 12机械、封装和可订购信息
7.3.6 Programming OUT Regulation Voltage
To set the proper output regulation voltage and input voltage power good comparator, the external resistors must be carefully selected.
The OUT regulation voltage is then given by Equation 5:
Note that VBIAS is nominally 1.21 V per the electrical specification table. The sum of the resistors is recommended to be no greater than 13 MΩ , that is, ROUT1 + ROUT2 = 13 MΩ. Higher resistors may result in poor output voltage regulation and/or input voltage power good threshold accuracies due to noise pickup via the high impedance pins or reduction of effective resistance due to parasitic resistances created from board assembly residue. See Layout Considerations section for more details. SLUC484 provides help on sizing and selecting the resistors.