ZHCSOA1A July 2021 – July 2021 TPS548B27
PRODUCTION DATA
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 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 Internal VCC LDO and Using External Bias on VCC Pin
- 7.3.2 Enable
- 7.3.3 Output Voltage Setting
- 7.3.4 Internal Fixed Soft Start and External Adjustable Soft Start
- 7.3.5 External REFIN For Output Voltage Tracking
- 7.3.6 Frequency and Operation Mode Selection
- 7.3.7 D-CAP3 Control
- 7.3.8 Low-Side FET Zero-Crossing
- 7.3.9 Current Sense and Positive Overcurrent Protection
- 7.3.10 Low-Side FET Negative Current Limit
- 7.3.11 Power Good
- 7.3.12 Overvoltage and Undervoltage Protection
- 7.3.13 Out-Of-Bounds (OOB) Operation
- 7.3.14 Output Voltage Discharge
- 7.3.15 UVLO Protection
- 7.3.16 Thermal Shutdown
- 7.4 Device Functional Modes
-
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 Output Voltage Setting Point
- 8.2.2.2 Choose the Switching Frequency and the Operation Mode
- 8.2.2.3 Choose the Inductor
- 8.2.2.4 Set the Current Limit (TRIP)
- 8.2.2.5 Choose the Output Capacitor
- 8.2.2.6 Choose the Input Capacitors (CIN)
- 8.2.2.7 Soft-Start Capacitor (SS/REFIN Pin)
- 8.2.2.8 EN Pin Resistor Divider
- 8.2.2.9 VCC Bypass Capacitor
- 8.2.2.10 BOOT Capacitor
- 8.2.2.11 PGOOD Pullup Resistor
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10布局
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- RYL|19
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
6.6 Typical Characteristics
Figure 6-1 Efficiency vs Output Current, 12 VIN, 800 KHz, DCM, VCC =
Int
| VIN = 12 V | VOUT = 1 V | Int Vcc |
| 300 nH | 800 Khz |
| VIN = 12 V | VOUT = 1 V | Ext Vcc 3.3 V |
| 300 nH | 800 Khz |
Figure 6-7 Output Voltage vs Output Current
| VIN = 12 V | IVCC = 2 mA |
Figure 6-11 Load
Transient
Figure 6-13 Enable Power Up, Skip
Figure 6-15 Enable Power Up, Pre-Bias
Figure 6-17 VOUT Ripple, FCCM, 0-A LoadFigure 6-2 Efficiency vs Output Current, 12 VIN, 800 KHz, DCM, VCC = EXT
3.3 V
| VIN = 12 V | VOUT = 5 V | Int Vcc |
| 800 nH | 600 Khz |
| VIN = 12 V | VOUT = 5 V | Ext Vcc 3.3 V |
| 800 nH | 600 Khz |
| VIN = 12 V | VEN = 0 V | Internal VCC LDO |
| VIN = 12 V |
Figure 6-12 Unload Transient
Figure 6-14 Enable Power Down, Skip
Figure 6-16 VOUT Ripple, FCCM, 20-A Load
Figure 6-18 VOUT Ripple, Skip Mode, 10-mA Load