LTC3556_15 Datasheet, PDF (31/36 Pages) Linear Technology – High Effi ciency USB Power Manager with Dual Buck and Buck-Boost DC/DCs

APPLICATIONS INFORMATION
V_BUS
R_NOM
100k
NTC
3
V_BUS
LTC3556
NTC BLOCK
0.765 • V_{BUS –}
+
T
R_NTC
100k
–
0.349 • V_BUS
+
TOO_COLD
TOO_HOT
+
0.017V • V_BUS
–
(7a)
NTC_ENABLE
3556 F07a
V_BUS
R_NOM
105k
NTC
3
V_BUS
LTC3556
NTC BLOCK
0.765 • V_{BUS –}
+
R1
12.7k
T
R_NTC
100k
–
0.349 • V_BUS
+
+
0.017 • V_BUS
–
(7b)
TOO_COLD
TOO_HOT
NTC_ENABLE
3556 F07b
Figure 7. NTC Circuits
LTC3556
3556f
31