ZHCSHL8D December 2017 – August 2020 LMZM33602
PRODUCTION DATA
- 1特性
- 2应用
- 3说明
- 4Revision History
- 5Pin Configuration and Functions
- 6Specifications
-
7Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Adjusting the Output Voltage
- 7.3.2 Feedforward Capacitor, CFF
- 7.3.3 Voltage Dropout
- 7.3.4 Switching Frequency (RT)
- 7.3.5 Synchronization (SYNC)
- 7.3.6 Input Capacitors
- 7.3.7 Output Capacitors
- 7.3.8 Output On/Off Enable (EN)
- 7.3.9 Programmable Undervoltage Lockout (UVLO)
- 7.3.10 Power Good (PGOOD)
- 7.3.11 Overcurrent Protection (OCP)
- 7.3.12 Thermal Shutdown
- 7.4 Device Functional Modes
- 8Application and Implementation
- 9Device and Documentation Support
7.3.10 Power Good (PGOOD)
The LMZM33602 has a built-in power-good signal (PGOOD) which indicates whether the output voltage is within its regulation range. The PGOOD pin is an open-drain output that requires a pullup resistor to a nominal voltage source of 12 V or less. The maximum recommended PGOOD sink current is 1 mA. A typical pullup resistor value is between 10 kΩ and 100 kΩ.
Once the output voltage rises above 94% of the set voltage, the PGOOD pin rises to the pullup voltage level. The PGOOD pin is pulled low when the output voltage drops lower than 92.5% or rises higher than 107% of the nominal set voltage. See Figure 7-14 for typical power-good thresholds.
Figure 7-14 Power Good Flag