sc2545 Semtech Corporation, sc2545 Datasheet - Page 7

• Manufacturer Part Number: sc2545
• Description: Sc2545 High Performance Wide Input Range Dual Synchronous Buck Controller
• Manufacturer: Semtech Corporation

© 2005 Semtech Corp.
POWER MANAGEMENT
Block Diagram
ERROUT
ENABLE
ROSC
FB
SS
VCC
VIN
AGND
Oscillator
Ramp
generator
EN
VCC
R
OUT
ON/OFF
FB
+
-
UVLO
VCC
Ramp1
CLK1
(One PWM channel shown)
0.75V
R
3
2
-
+
+
-
E/A
Clamp
OUT
PWM
Band
Gap 1
1
0.65V
UVLO
+
-
OUT
10V
LDO
Band
Gap 2
S
R
R
S
7
0.75V
/Q
Q
Protect 1
0.75V
0.675V
FB1
FB2
OVP
Protect 1
OUT
+
-
-
OUT
Protect 1
+
-
OCP
FB1
PVCC
0.89V
OUT
OVP
PHASE1
PVCC
+
-
OCP
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SC2545
VCC
10u A
PWRGD
BST
DRVH
PHASE
PVCC
DRVL
ILIM