User's Manual
Table Of Contents
- 1 Document information
- 2 Hardware design block diagram
- 3 Power Consumption
- 4 Hardware capabilities
- 5 Connector datasheet
- 6 PCB production information
Page:9
The out1 output resistance is determined by the values R11 and
R12,R11=4.99K,R12=20k,VFB1=1.2V.
Available,Vout1=(R11/R12+1)*VFB1 = 1.5V
Figure 9 Vout Calculation
4.2.3 DC:5V to VDD_CPU
VCC_SYS(5V) to VDD_CPU with SYR837 BUCK DCDC. The SYR837 is I2C programmable to regulate
the output voltage between 0.7125V and 1.5V.
Table 8 DCDC:5V to VDD_CPU Functional Table
Functional classes Feature description illustrate
1 Input properties The system input voltage is 2.6V-5.5Vand is normal YES
2 Output properties Demand ID: Load current
＜6A
3 Output properties Ripple + noise
＜5%
6 other Switching frequency 2.4MHz
7 other IO enable YES
8 Input properties 5V Input Ripple + Noise <5%
9 other The output voltage is programmable YES