LTC4416-1 Linear Technology, LTC4416-1 Datasheet - Page 6

• Manufacturer Part Number: LTC4416-1
• Description: Low Loss Dual PowerPath Controllers
• Manufacturer: Linear Technology

LTC4416/LTC4416-1
BLOCK DIAGRA
OPERATIO
Operation can best be understood by referring to the
Block Diagram which illustrates the internal circuit blocks.
The LTC4416/LTC4416-1 are divided into three sections,
namely:
1. The channel 1 controller consisting of A1, C1, the “first
2. The band-gap reference
3. The channel 2 controller consisting of A2, C2, the

analog contoller,” the G1 drivers and the H1 output
driver.
“second analog controller,” the G2 drivers and the H2
output driver.
U
9
8
2
3
7
4
GND
V1
V
E1
V2
E2
S
W
A1
A2
V
V
REF
REF
+
–
+
–
RAILBG
C1
C2
EN1
CONTROLLER
REFERENCE
BAND-GAP
SECOND
ANALOG
CONTROLLER
ANALOG
FIRST
EN2
Each of the three sections has its own derived internal
power supply referred to as a rail. RAIL1 provides power
to the channel 1 controller. RAIL2 provides power to the
channel 2 controller. The internal RAILBG provides power
to the band-gap reference. The internal rail1 derives its
power from the higher voltage of V1 and V
rail2 derives its power from the higher voltage of V2 and
V
V1, V2, and V
connected to the GND pin.
S
EN1
. RAILBG derives its power from the highest voltage of
RAIL1
RAIL2
EN1
V REF
EN2
EN2
S
. All three sections share a common ground
I G(SRC)
I G(SNK)
I G(SRC)
I G(SNK)
I G(OFF)
I GFON(SNK)
I G(OFF)
I GFON(SNK)
8.5V
8.5V
I G1
I G2
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G1
H1
G2
H2
4416 BD
10
1
6
5
S
. The internal
4416fa