34704_11 Datasheet, PDF (26/54 Pages) Freescale Semiconductor, Inc – Multiple Channel DC-DC Power Management IC

FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
Table 6. Regulator Analysis Table
Vin (V)
Vout (V)
Iout_typ (A)
Iout_max (A)
DCR(mΩ)
Cout (μF)
ESR (mΩ)
Fsw (kHz)
Lout (μH)
Iin_typ (A)
Iin_max (A)
ILout_peak (A)
ICout_RMS (A)
Pout (W)
Ploss On Chip (W)
Ploss Total (W)
Pin (W)
n (%)
REG1 REG2 REG3 REG4 REG5 REG6 REG7 REG8
3.60
3.60
3.60
3.60
3.60
3.60
3.60
3.60
5.00
3.30
1.20
1.80
3.30
15
-7
15
0.100 0.200 0.150 0.100 0.150 0.050 0.050 0.015
0.500 0.500 0.550 0.300 0.500 0.060 0.060 0.030
230
230
230
310
230
230
230
230
22
22
22
22
22
22
22
22
9.00
9.00
9.00
9.00
9.00
9.00
9.00
9.00
1500 1500 1500 1500 1500 1000 1000 1000
1.50
1.50
1.50
1.50
1.50
4.70
4.70
4.70
0.154 0.201 0.063 0.059 0.150 0.254 0.107 0.077
0.540 0.502 0.209 0.178 0.501 0.304 0.128 0.154
0.724 0.510 0.649 0.444 0.512 0.444 0.443 0.297
0.212 0.005 0.074 0.076 0.0006 0.071 0.129 0.043
0.500 0.660 0.180 0.180 0.495 0.750 0.350 0.225
0.042 0.047 0.038 0.028 0.034 0.135 0.000 0.045
0.044 0.049 0.041 0.030 0.035 0.145 0.027 0.047
0.544 0.709 0.221 0.210 0.530 0.895 0.377 0.272
91.90% 93.12% 81.48% 85.91% 93.33% 60.00% 69.00% 64.00%
Table 7. 34704A overall system efficiency 84%
Overall System
Pout (W)
Ploss On Chip (W)
Ploss Total (W)
Pin (W)
n (%)
3.340
0.369
0.41
3.75
84.00%
Table 8. 34704B overall system efficiency 89%
Overall System
Pout (W)
Ploss On Chip (W)
Ploss Total (W)
Pin (W)
n (%)
1.74
0.192
0.202
1.942
89.6%
34704
26
Analog Integrated Circuit Device Data
Freescale Semiconductor