ZHCSLX5B March 2021 – April 2024 TPS628501 , TPS628502 , TPS628503
PRODUCTION DATA
- 1
- 1 特性
- 2 应用
- 3 说明
- 4 Device Comparison Table
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Parameter Measurement Information
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4
Device Functional Modes
- 8.4.1 Pulse Width Modulation (PWM) Operation
- 8.4.2 Power Save Mode Operation (PWM/PFM)
- 8.4.3 100% Duty-Cycle Operation
- 8.4.4 Current Limit and Short Circuit Protection
- 8.4.5 Foldback Current Limit and Short Circuit Protection
- 8.4.6 Output Discharge
- 8.4.7 Soft Start
- 8.4.8 Input Overvoltage Protection
- 9 Application and Implementation
- 10Device and Documentation Support
- 11Revision History
- 12Mechanical, Packaging, and Orderable Information
5 Pin Configuration and Functions
Figure 5-1 8-Pin SOT583DRL Package(Top View)Table 5-1 Pin Functions
| PIN | TYPE(1) | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| EN | 2 | I | This is the enable pin of the device. Connect to logic low to disable the device. Pull high to enable the device. Do not leave this pin unconnected. |
| FB | 5 | I | Voltage feedback input. Connect the resistive output voltage divider to this pin. |
| GND | 8 | Ground pin | |
| MODE/SYNC | 3 | I | The device runs in PFM/PWM mode when this pin is pulled low. When the pin is pulled high, the device runs in forced PWM mode. Do not leave this pin unconnected. The mode pin can also be used to synchronize the device to an external frequency. See Section 6.5 for the detailed specification for the digital signal applied to this pin for external synchronization. |
| COMP/FSET | 4 | I | Device compensation and frequency set input. A resistor from this pin to GND defines the compensation of the control loop as well as the switching frequency if not externally synchronized. |
| PG | 6 | O | Open-drain power-good output |
| SW | 7 | This is the switch pin of the converter and is connected to the internal Power MOSFETs. | |
| VIN | 1 | Power supply input. Make sure the input capacitor is connected as close as possible between pin VIN and GND. | |
(1) I = input, O = output