Unless otherwise specified the following conditions apply: VIN = 12 V, TA = 25°C. The circuit is shown in Figure 9-31, with the appropriate BOM from Table 9-3 or Table 9-4.
![Efficiency GUID-8A94E6CC-E6E3-43BD-9B6A-7BEEDFAEFFED-low.png](/ods/images/JAJSEU2F/GUID-8A94E6CC-E6E3-43BD-9B6A-7BEEDFAEFFED-low.png)
VOUT = 5 V | 400 kHz | DDA Package |
Figure 9-7 Efficiency![Efficiency GUID-2CE63F77-B8C7-4038-965F-32A66C417E13-low.png](/ods/images/JAJSEU2F/GUID-2CE63F77-B8C7-4038-965F-32A66C417E13-low.png)
VOUT = 5 V | 1.4 MHz | DDA Package |
Figure 9-9 Efficiency![Efficiency GUID-17A593FD-40F9-4162-B1D2-18CEFCE8191C-low.png](/ods/images/JAJSEU2F/GUID-17A593FD-40F9-4162-B1D2-18CEFCE8191C-low.png)
VOUT = 5
V |
2.1
MHz |
DDA
Package |
Figure 9-11 Efficiency![Efficiency GUID-457D77B7-50C0-4098-9634-DBC47ED528FD-low.png](/ods/images/JAJSEU2F/GUID-457D77B7-50C0-4098-9634-DBC47ED528FD-low.png)
VOUT = 5
V |
400
kHz |
RNX
Package |
Figure 9-13 Efficiency![Efficiency GUID-4922136F-E8CC-4A62-99C6-BC7C40A63B0D-low.png](/ods/images/JAJSEU2F/GUID-4922136F-E8CC-4A62-99C6-BC7C40A63B0D-low.png)
VOUT = 5
V |
1.4
MHz |
RNX
Package |
Figure 9-15 Efficiency![Efficiency GUID-6B60B1D4-2A1C-4D2A-B2A5-DC062A2D12D1-low.png](/ods/images/JAJSEU2F/GUID-6B60B1D4-2A1C-4D2A-B2A5-DC062A2D12D1-low.png)
VOUT = 5
V |
2.1
MHz |
RNX
Package |
Figure 9-17 Efficiency
Figure 9-19 Line and Load Regulation
Figure 9-21 Mode Change Thresholds![Load Transient GUID-DFF74624-3395-4BBA-9FF7-13C06E56E6F1-low.gif](/ods/images/JAJSEU2F/GUID-DFF74624-3395-4BBA-9FF7-13C06E56E6F1-low.gif)
VIN = 12 V |
|
VOUT = 5
V |
tf = tr
= 2 µs |
IOUT = 0 A to 3 A |
Figure 9-23 Load Transient
Figure 9-25 Line and Load Regulation![Mode Change Thresholds GUID-9B47A068-29B3-4E5F-BC27-8BDB2379C478-low.png](/ods/images/JAJSEU2F/GUID-9B47A068-29B3-4E5F-BC27-8BDB2379C478-low.png)
VOUT = 3.3
V |
ƒSW = 400
kHz |
|
Figure 9-27 Mode Change Thresholds![Load Transient GUID-BA87D34E-B9D9-4F50-8E1A-A41AD3595119-low.gif](/ods/images/JAJSEU2F/GUID-BA87D34E-B9D9-4F50-8E1A-A41AD3595119-low.gif)
VIN = 12
V |
|
VOUT = 3.3
V |
tf =
tr = 2 µs |
IOUT = 0 A to 3 A |
Figure 9-29 Load Transient![Efficiency GUID-D1A52481-F166-47F3-AA80-C09B965A6554-low.png](/ods/images/JAJSEU2F/GUID-D1A52481-F166-47F3-AA80-C09B965A6554-low.png)
VOUT = 3.3 V | 400 kHz | DDA Package |
Figure 9-8 Efficiency![Efficiency GUID-AC937FBC-0E77-4418-9F4E-6526381EE08A-low.png](/ods/images/JAJSEU2F/GUID-AC937FBC-0E77-4418-9F4E-6526381EE08A-low.png)
VOUT = 3.3 V | 1.4 MHz | DDA Package |
Figure 9-10 Efficiency![Efficiency GUID-D49EB713-622B-4543-890D-E50538BDBC75-low.png](/ods/images/JAJSEU2F/GUID-D49EB713-622B-4543-890D-E50538BDBC75-low.png)
VOUT = 3.3
V |
2.1 MHz |
DDA Package |
Figure 9-12 Efficiency![Efficiency GUID-43652BA2-1DA8-49FF-8BC6-DEC6C8EDE882-low.png](/ods/images/JAJSEU2F/GUID-43652BA2-1DA8-49FF-8BC6-DEC6C8EDE882-low.png)
VOUT = 3.3
V |
400
kHz |
RNX
Package |
Figure 9-14 Efficiency![Efficiency GUID-4E6C72A4-2D3A-4293-91A4-49DAD5CB9C9A-low.png](/ods/images/JAJSEU2F/GUID-4E6C72A4-2D3A-4293-91A4-49DAD5CB9C9A-low.png)
VOUT = 3.3
V |
1.4
MHz |
RNX
Package |
Figure 9-16 Efficiency![Efficiency GUID-EA1D3DF9-3A55-400A-AE94-39B24AE433D4-low.png](/ods/images/JAJSEU2F/GUID-EA1D3DF9-3A55-400A-AE94-39B24AE433D4-low.png)
VOUT = 3.3
V |
2.1 MHz |
RNX Package |
Figure 9-18 Efficiency![Input Supply Current GUID-49275FDC-3154-4426-A4E9-3FCB1125CD7B-low.png](/ods/images/JAJSEU2F/GUID-49275FDC-3154-4426-A4E9-3FCB1125CD7B-low.png)
VOUT = 5
V |
IOUT = 0
A |
RFBT = 1
MΩ |
Figure 9-20 Input Supply Current
Figure 9-22 Switching Frequency versus Output Current![Load Transient GUID-BFA865B0-FA00-47F4-A2D2-BA6171D3D1EC-low.gif](/ods/images/JAJSEU2F/GUID-BFA865B0-FA00-47F4-A2D2-BA6171D3D1EC-low.gif)
VIN = 12 V |
|
VOUT = 5
V |
tf = tr
= 2 µs |
IOUT = 1 A to 3 A |
Figure 9-24 Load Transient![Input Supply Current GUID-741AE52B-2A48-416F-84CE-171E12AF6F22-low.png](/ods/images/JAJSEU2F/GUID-741AE52B-2A48-416F-84CE-171E12AF6F22-low.png)
VOUT = 3.3
V |
IOUT = 0
A |
RFBT = 1
MΩ |
Figure 9-26 Input Supply Current![Switching Frequency versus Output Current GUID-C95F2C7A-E827-415B-9958-6A0A49BDFC02-low.png](/ods/images/JAJSEU2F/GUID-C95F2C7A-E827-415B-9958-6A0A49BDFC02-low.png)
VOUT = 3.3
V |
ƒSW = 400
kHz |
|
Figure 9-28 Switching Frequency versus Output Current![Load Transient GUID-368EE9B6-6BD3-42C5-B4B3-E88DC6D29175-low.gif](/ods/images/JAJSEU2F/GUID-368EE9B6-6BD3-42C5-B4B3-E88DC6D29175-low.gif)
VIN = 12 V |
VOUT =
3.3V |
IOUT = 1 A to 3
A |
tf = tr = 2 µs |
|
Figure 9-30 Load Transient
Figure 9-31 Circuit for Application Curves
The values in this table were selected to enhance certain performance criteria and
may not represent typical values.
Table 9-3 BOM for Typical Application Curves DDA
PackageVOUT | FREQUENCY | RFBB | COUT | CIN + CHF | L | U1 |
---|
3.3 V | 400 kHz | 43.3 kΩ | 4 × 22 µF | 1 × 10 µF + 1 × 220 nF | 6.8 µH, 14 mΩ | LMR33630ADDA |
3.3 V | 1400 KHz | 43.3 kΩ | 4 × 22 µF | 1 × 10 µF + 1 × 220 nF | 2.2 µH, 11.4 mΩ | LMR33630BDDA |
3.3 V | 2100 kHz | 43.3 kΩ | 4 × 22 µF | 1 × 10 µF + 1 × 220 nF | 1.2 µH, 16 mΩ | LMR33630CDDA |
5 V | 400 kHz | 24.9 kΩ | 4 × 22 µF | 1 × 10 µF + 1 × 220 nF | 8 µH, 14 mΩ | LMR33630ADDA |
5 V | 1400 KHz | 24.9 kΩ | 4 × 22 µF | 1 × 10 µF + 1 × 220 nF | 2.2 µH, 11.4 mΩ | LMR33630BDDA |
5 V | 2100 kHz | 24.9 kΩ | 4 × 22 µF | 1 × 10 µF + 1 × 220 nF | 1.5 µH, 8.2 mΩ | LMR33630CDDA |
Table 9-4 BOM for Typical Application Curves RNX
PackageVOUT | 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 |