LTC1473 LINER [Linear Technology], LTC1473 Datasheet - Page 11

• Manufacturer Part Number: LTC1473
• Description: Dual PowerPathTM Switch Driver
• Manufacturer: LINER [Linear Technology]

APPLICATIONS
V
The V
higher than any of the three main power source voltages
to allow the control of N-channel MOSFET switches. This
micropower, step-up voltage regulator is powered by the
highest potential available from the three main power
sources for maximum regulator efficiency.
GG
Regulator Inductor and Capacitors
GG
regulator provides a power supply voltage 8.5V
U
INFORMATION
U
*COILCRAFT 1812LS-105 XKBC. [phone]
W
LTC1473
DRIVERS
TO GATE
Figure 5. V
U
REGULATOR
SWITCHING
V
GG
(8.5V + V
GG
Step-Up Switching Regulator
+
)
Three external components are required by the V
lator: L1, C1 and C2, as shown in Figure 5.
L1 is a small, low current, 1mH surface mount inductor. C1
provides filtering at the top of the 1mH switched inductor
and should be at least 1 F to filter switching transients.
The V
ing for the V
for 50V operation. C1 and C2 can be ceramic capacitors.
GND
V
V
SW
GG
+
GG
DCIN
output capacitor, C2, provides storage and filter-
L1*
1mH
BAT1
GG
output and should be at least 1 F and rated
C2
1 F
50V
BAT2
1473 F05
C1
1 F
50V
LTC1473
GG
11
regu-