ZHCSJF8F December 2008 – April 2019 TPS61175
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Custom Design with WEBENCH Tools
- 8.2.2.2 Determining the Duty Cycle
- 8.2.2.3 Selecting the Inductor
- 8.2.2.4 Computing the Maximum Output Current
- 8.2.2.5 Setting Output Voltage
- 8.2.2.6 Setting the Switching Frequency
- 8.2.2.7 Setting the Soft-Start Time
- 8.2.2.8 Selecting the Schottky Diode
- 8.2.2.9 Selecting the Input and Output Capacitors
- 8.2.2.10 Compensating the Small Signal Control Loop
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
5 Pin Configuration and Functions
TSSOP
14 Pins
Top View
Pin Functions
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| AGND | 7 | I | Signal ground of the IC |
| COMP | 8 | O | Output of the internal transconductance error amplifier. An external RC network is connected to this pin to compensate the regulator. |
| EN | 4 | I | Enable pin. When the voltage of this pin falls below the enable threshold for more than 10ms, the IC turns off. |
| FB | 9 | I | Feedback pin for positive voltage regulation. Connect to the center tap of a resistor divider to program the output voltage. |
| FREQ | 10 | O | Switch frequency program pin. An external resistor is connected to this pin to set switch frequency. See application section for information on how to size the FREQ resistor. |
| NC | 11 | I | Reserved pin. Must connect this pin to ground. |
| PGND | 12,13,14 | I | Power ground of the IC. It is connected to the source of the PWM switch. |
| SS | 5 | O | Soft start programming pin. A capacitor between the SS pin and GND pin programs soft start timing. See Application and Implementation for information on how to size the SS capacitor. |
| SW | 1,2 | I | This is the switching node of the IC. Connect SW to the switched side of the inductor. |
| SYNC | 6 | I | Switch frequency synchronous pin. Customers can use an external signal to set the IC switch frequency between 200-kHz and 2.2-MHz. If not used, this pin should be tied to AGND as short as possible to avoid noise coupling. |
| Thermal Pad | The thermal pad should be soldered to the analog ground. If possible, use thermal via to connect to top and internal ground plane layers for ideal power dissipation. | ||
| VIN | 3 | I | The input supply pin for the IC. Connect VIN to a supply voltage between 2.9 V and 18 V. It is acceptable for the voltage on the pin to be different from the boost power stage input for applications requiring voltage beyond VIN range. |