ZHCSJY0B June 2012 – June 2019 LMR12015 , LMR12020
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
Detailed Design Procedure
- 8.2.1.1 Custom Design With WEBENCH® Tools
- 8.2.1.2 Inductor Selection
- 8.2.1.3 Input Capacitor
- 8.2.1.4 Output Capacitor
- 8.2.1.5 Catch Diode
- 8.2.1.6 Boost Diode (Optional)
- 8.2.1.7 Boost Capacitor
- 8.2.1.8 Output Voltage
- 8.2.1.9 Feedforward Capacitor (Optional)
- 8.2.1.10
Calculating Efficiency and Junction Temperature
- 8.2.1.10.1 Schottky Diode Conduction Losses
- 8.2.1.10.2 Inductor Conduction Losses
- 8.2.1.10.3 MOSFET Conduction Losses
- 8.2.1.10.4 MOSFET Switching Losses
- 8.2.1.10.5 IC Quiescent Losses
- 8.2.1.10.6 MOSFET Driver Losses
- 8.2.1.10.7 Total Power Losses
- 8.2.1.10.8 Efficiency Calculation Example
- 8.2.1.10.9 Calculating the LMR2015/20 Junction Temperature
- 8.2.2 Application Curves
- 8.2.3 LMR12015/20 Circuit Examples
- 8.2.1
Detailed Design Procedure
- 9 Layout
- 10器件和文檔支持
- 11機械、封裝和可訂購信息
8.2.3 LMR12015/20 Circuit Examples
Figure 37. VIN = 7 - 20 V, VOUT = 5 V, ƒSW = 2 MHz,
IOUT = Full Load With CFF
Table 3. Bill Of Materials For Figure 37
| PART NAME | PART ID | PART VALUE | PART NUMBER | MANUFACTURER |
|---|---|---|---|---|
| Buck Regulator | U1 | 1.5 or 2A Buck Regulator | LMR12015/20 | Texas Instruments |
| CPVIN | C1 | 10 µF | C1210C106K8PACTU | Kemet |
| CBOOST | C2 | 0.1 µF | C0603X104K4RACTU | Kemet |
| COUT | C3 | 22 µF | GRM32ER71C226KE18L | MuRata |
| COUT | C4 | 22 µF | GRM32ER71C226KE18L | MuRata |
| CFF | C5 | 0.18 µF | 0603ZC184KAT2A | AVX |
| Catch Diode | D1 | Schottky Diode Vf = 0.32V | CMS06 | Toshiba |
| Inductor | L1 | 3.3 µH | 7447789003 | Wurth |
| Feedback Resistor | R1 | 4.02 kΩ | CRCW06034K02FKEA | Vishay |
| Feedback Resistor | R2 | 1.02 kΩ | CRCW06031K02FKEA | Vishay |
Figure 38. VIN = 5 - 20 V, VOUT = 3.3 V, ƒSW = 2 MHz,
IOUT = Full Load With CFF
Table 4. Bill Of Materials For Figure 38
| PART NAME | PART ID | PART VALUE | PART NUMBER | MANUFACTURER |
|---|---|---|---|---|
| Buck Regulator | U1 | 1.5 or 2A Buck Regulator | LMR12015/20 | Texas Instruments |
| CPVIN | C1 | 10 µF | C1210C106K8PACTU | Kemet |
| CBOOST | C2 | 0.1 µF | C0603X104K4RACTU | Kemet |
| COUT | C3 | 22 µF | GRM32ER71C226KE18L | MuRata |
| COUT | C4 | 22 µF | GRM32ER71C226KE18L | MuRata |
| CFF | C5 | 0.18 µF | 0603ZC184KAT2A | AVX |
| Catch Diode | D1 | Schottky Diode Vf = 0.32V | CMS06 | Toshiba |
| Inductor | L1 | 3.3 µH | 7447789003 | Wurth |
| Feedback Resistor | R1 | 2.32 kΩ | CRCW06032K32FKEA | Vishay |
| Feedback Resistor | R2 | 1.02 kΩ | CRCW06031K02FKEA | Vishay |
Figure 39. VIN = 5 - 20 V, VOUT = 3.3 V, ƒSW = 2 MHz,
IOUT = Full Load Without CFF
Table 5. Bill Of Materials For Figure 39
| PART NAME | PART ID | PART VALUE | PART NUMBER | MANUFACTURER |
|---|---|---|---|---|
| Buck Regulator | U1 | 1.5 or 2A Buck Regulator | LMR12015/20 | Texas Instruments |
| CPVIN | C1 | 10 µF | C1210C106K8PACTU | Kemet |
| CBOOST | C2 | 0.1 µF | C0603X104K4RACTU | Kemet |
| COUT | C3 | 22 µF | GRM32ER71C226KE18L | MuRata |
| COUT | C4 | 22 µF | GRM32ER71C226KE18L | MuRata |
| Catch Diode | D1 | Schottky Diode Vf = 0.32V | CMS06 | Toshiba |
| Inductor | L1 | 3.3 µH | 7447789003 | Sumida |
| Feedback Resistor | R1 | 2.32 kΩ | CRCW06032K32FKEA | Vishay |
| Feedback Resistor | R2 | 1.02 kΩ | CRCW06031K02FKEA | Vishay |
Figure 40. VIN = 3.3 - 16 V, VOUT = 1.8 V, ƒSW = 2 MHz, IOUT = Full Load Table 6. Bill Of Materials For Figure 40
| PART NAME | PART ID | PART VALUE | PART NUMBER | MANUFACTURER |
|---|---|---|---|---|
| Buck Regulator | U1 | 1.5 or 2A Buck Regulator | LMR12015/20 | Texas Instruments |
| CPVIN | C1 | 10 µF | GRM32DR71E106KA12L | Murata |
| CBOOST | C2 | 0.1 µF | GRM188R71C104KA01D | Murata |
| COUT | C3 | 22 µF | C3225X7R1C226K | TDK |
| COUT | C4 | 22 µF | C3225X7R1C226K | TDK |
| Catch Diode | D1 | Schottky Diode Vf = 0.32V | CMS06 | Toshiba |
| Inductor | L1 | 1.0 µH | CDRH5D18BHPNP | Sumida |
| Feedback Resistor | R1 | 12 kΩ | CRCW060312K0FKEA | Vishay |
| Feedback Resistor | R2 | 15 kΩ | CRCW060315K0FKEA | Vishay |
Figure 41. VIN = 3.3 - 16 V, VOUT = 1.8 V, ƒSW = 1 MHz, IOUT = Full Load Table 7. Bill Of Materials For Figure 41
| PART NAME | PART ID | PART VALUE | PART NUMBER | MANUFACTURER |
|---|---|---|---|---|
| Buck Regulator | U1 | 1.5 or 2A Buck Regulator | LMR12015/20 | Texas Instruments |
| CPVIN | C1 | 10 µF | GRM32DR71E106KA12L | Murata |
| CBOOST | C2 | 0.1 µF | GRM188R71C104KA01D | Murata |
| COUT | C3 | 22 uF | C3225X7R1C226K | TDK |
| COUT | C4 | 22 uF | C3225X7R1C226K | TDK |
| CFF | C5 | 3.9 nF | GRM188R71H392KA01D | Murata |
| Catch Diode | D1 | Schottky Diode Vf = 0.32V | CMS06 | Toshiba |
| Inductor | L1 | 1.8 µH | CDRH5D18BHPNP | Sumida |
| Feedback Resistor | R1 | 12 kΩ | CRCW060312K0FKEA | Vishay |
| Feedback Resistor | R2 | 15 kΩ | CRCW060315K0FKEA | Vishay |
Figure 42. VIN = 3.3 - 9 V, VOUT = 1.2 V, ƒSW = 2 MHz, IOUT = Full Load Table 8. Bill Of Materials For Figure 42
| PART NAME | PART ID | PART VALUE | PART NUMBER | MANUFACTURER |
|---|---|---|---|---|
| Buck Regulator | U1 | 1.5 or 2A Buck Regulator | LMR12015/20 | Texas Instruments |
| CPVIN | C1 | 10 µF | GRM32DR71E106KA12L | Murata |
| CBOOST | C2 | 0.1 µF | GRM188R71C104KA01D | Murata |
| COUT | C3 | 47 µF | GRM32ER61A476KE20L | Murata |
| COUT | C4 | 22 µF | C3225X7R1C226K | TDK |
| CFF | C5 | NOT MOUNTED | ||
| Catch Diode | D1 | Schottky Diode Vf = 0.32V | CMS06 | Toshiba |
| Inductor | L1 | 0.56 µH | CDRH2D18/HPNP | Sumida |
| Feedback Resistor | R1 | 1.02 kΩ | CRCW06031K02FKEA | Vishay |
| Feedback Resistor | R2 | 5.10 kΩ | CRCW06035K10FKEA | Vishay |