ZHCSOF9B april 2022 – june 2023 TPS25981
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Undervoltage Lockout (UVLO and UVP)
- 8.3.2 Overvoltage Lockout (OVLO)
- 8.3.3 Inrush Current, Overcurrent, and Short-Circuit Protection
- 8.3.4 Analog Load Current Monitor
- 8.3.5 Overtemperature Protection (OTP)
- 8.3.6 Fault Response and Indication (FLT)
- 8.3.7 Power Good Indication (PG)
- 8.3.8 Quick Output Discharge (QOD)
- 8.3.9 Reverse Current Blocking FET Driver
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
6 Pin Configuration and Functions
Figure 6-1 TPS25981xx RPW Package 10-Pin QFN Top ViewTable 6-1 Pin Functions
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| EN/UVLO | 1 | Analog Input | Active high enable for the device. A resistor divider on this pin from input supply to GND can be used to adjust the undervoltage lockout threshold. Do not leave floating. Refer to Undervoltage Lockout (UVLO and UVP) for details. |
EN/OVLO | 2 | Analog Input | A resistor divider on this pin from supply to GND can be used to adjust the overvoltage lockout threshold. This pin can also be used as an Active low enable for the device. Do not leave floating. Refer to Overvoltage Lockout (OVLO) for details. |
PG | 3 | Digital Output | Power Good indication. This pin is an open-drain signal which is asserted high when the power FET has fully turned ON and is ready to deliver power. Refer to Power Good (PG) for more details. |
FLT | 4 | Digital Output | Active low fault event indicator. This pin is an open-drain signal which is pulled low when a fault is detected. Refer to Fault Response and Indication (FLT) for more details. |
IN | 5 | Power | Power input |
OUT | 6 | Power | Power output |
DVDT | 7 | Analog Output | A capacitor from this pin to GND sets the output turn on slew rate. Leave this pin floating for the fastest turn-on slew rate. Refer to Slew Rate (dVdt) and Inrush Current Control for details. Only for TPS259813x variants, this pin can also be used to drive an external FET to implement reverse current blocking. Please refer to Reverse Current Blocking FET Driver for more details. |
GND | 8 | Ground | This pin is the ground reference for all internal circuits and must be connected to system GND. |
ILM | 9 | Analog Output | This pin is a dual function pin used to limit and monitor the output current. An external resistor from this pin to GND sets the overcurrent protection threshold during start-up as well as steady-state. The pin voltage can also be used as analog output load current monitor signal. Do not leave floating. Refer to Circuit-Breaker During Steady-state or Active Current Limiting During Start-up for more details. |
ITIMER | 10 | Analog Output | A capacitor from this pin to GND sets the overcurrent blanking interval during which the output current can temporarily exceed set current limit (but lower than fast-trip threshold) during steady-state before the device overcurrent response takes action. Leave this pin open for fastest response to overcurrent events. Refer to Circuit-Breaker During Steady-state for more details. |