ZHCSIE8C June 2018 – October 2020 LMR33630-Q1
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 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 Choosing the Switching Frequency
- 8.2.2.3 Setting the Output Voltage
- 8.2.2.4 Inductor Selection
- 8.2.2.5 Output Capacitor Selection
- 8.2.2.6 Input Capacitor Selection
- 8.2.2.7 CBOOT
- 8.2.2.8 VCC
- 8.2.2.9 CFF Selection
- 8.2.2.10 External UVLO
- 8.2.2.11 Maximum Ambient Temperature
- 8.2.3 Application Curves
- 8.3 What to Do and What Not to Do
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
封装选项
请参考 PDF 数据表获取器件具体的封装图。
机械数据 (封装 | 引脚)
- RNX|12
散热焊盘机械数据 (封装 | 引脚)
- RNX|12
订购信息
8.2.3 Application Curves
Unless otherwise specified the following conditions apply: VIN = 12 V, TA = 25°C. The circuit is shown in Figure 8-29, with the appropriate BOM from Table 8-3.
| VOUT = 5 V | 400 kHz | RNX Package |
| VOUT = 5 V | 1.4 MHz | RNX Package |
| VOUT = 5 V | 2.1 MHz | RNX Package |
| VOUT = 5 V |
| VOUT = 5 V | ƒSW = 400 kHz |
| VIN = 12 V | VOUT = 5 V | |
| tf = tr = 2 µs | IOUT = 0 A to 3 A | |
| VOUT = 3.3 V |
| VOUT = 3.3 V | ƒSW = 400 kHz |
| VIN = 12 V | VOUT = 3.3 V | |
| tf = tr = 2 µs | IOUT = 0 A to 3 A | |
| VIN = 12 V | VOUT = 5 V | IOUT = 3 A |
| ƒSW = 400 kHz | RNX package | |
| VIN = 12 V | VOUT = 5 V | IOUT = 3 A |
| ƒSW = 400 kHz | RNX package | |
| VIN = 12 V | VOUT = 5 V | IOUT = 3 A |
| ƒSW = 400 kHz | RNX package | |
| VOUT = 3.3 V | 400 kHz | RNX Package |
| VOUT = 3.3 V | 1.4 MHz | RNX Package |
| VOUT = 3.3 V | 2.1 MHz | RNX Package |
| VOUT = 5 V | IOUT = 0 A | RFBT = 1 MΩ |
| VOUT = 5 V | ƒSW = 2100 kHz |
| VIN = 12 V | VOUT = 5 V | |
| tf = tr = 2 µs | IOUT = 1 A to 3 A | |
| VOUT = 3.3 V | IOUT = 0 A | RFBT = 1 MΩ |
A.
Figure 8-20 Switching Frequency versus Output Current| VOUT = 3.3 V | ƒSW = 2100 kHz |
| VIN = 12 V | VOUT = 3.3V | IOUT = 1 A to 3 A |
| tf = tr = 2 µs | ||
| VIN = 12 V | VOUT = 5 V | IOUT = 3 A |
| ƒSW = 400 kHz | RNX package | |
| VIN = 12 V | VOUT = 5 V | IOUT = 3 A |
| ƒSW = 400 kHz | RNX package | |
| VIN = 12 V | VOUT = 5 V | IOUT = 3 A |
| ƒSW = 400 kHz | RNX package | |
Rod Antenna
Figure 8-29 Circuit for Application CurvesTable 8-3 BOM for Typical Application Curves RNX Package(1)
| VOUT | FREQUENCY | RFBB | COUT | CIN + CHF | L | U1 |
|---|---|---|---|---|---|---|
| 3.3 V | 400 kHz | 43.3 kΩ | 4 × 22 µF | 2 × 4.7 µF + 2 × 100 nF | 6.8 µH, 14 mΩ | LMR33630ARNX |
| 3.3 V | 1400 KHz | 43.3 kΩ | 4 × 22 µF | 2 × 4.7 µF + 2 × 100 nF | 2.2 µH, 11.4 mΩ | LMR33630BRNX |
| 3.3 V | 2100 kHz | 43.3 kΩ | 4 × 22 µF | 2 × 4.7 µF + 2 × 100 nF | 1.2 µH, 7 mΩ | LMR33630CRNX |
| 5 V | 400 kHz | 24.9 kΩ | 4 × 22 µF | 2 × 4.7 µF + 2 × 100 nF | 8 µH, 25 mΩ | LMR33630ARNX |
| 5 V | 1400 KHz | 24.9 kΩ | 4 × 22 µF | 2 × 4.7 µF + 2 × 100 nF | 2.2 µH, 11.4 mΩ | LMR33630BRNX |
| 5 V | 2100 kHz | 24.9 kΩ | 4 × 22 µF | 2 × 4.7 µF + 2 × 100 nF | 1.5 µH, 8.2 mΩ | LMR33630CRNX |
(1) The values in this table were selected to enhance certain performance criteria
and may not represent typical values.
Figure 8-30 Typical Input EMI FilterFilter Used Only for EMI Measurements Found in Application Curves