sc1109acstrt Semtech Corporation, sc1109acstrt Datasheet - Page 5
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sc1109acstrt
Manufacturer Part Number
sc1109acstrt
Description
Sc1109 Synchronous Pwm Controller With Dual Low-dropout Regulator Controllers
Manufacturer
Semtech Corporation
Datasheet
1.SC1109ACSTRT.pdf
(19 pages)
Marking Information
POWER MANAGEMENT
Block Diagram
2004 Semtech Corp.
yyww
xxxxx
SC1109ACS
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xxxxx
SC1109A/B
SC1109C
= Datecode (Example: 9912)
= Semtech Lot # (Example: 90101)
SC1109A
VOSENSE
VOSENSE
PWRGD
BCAP+
BCAP-
SS/EN
BCAP+
STBY
BCAP-
SS/EN
VCC
STBY
VCC
VCC
VCC
10uA
2uA
10uA
2uA
Bandgap
VBG
VBG
Bandgap
SC1109BS
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xxxxx
+10%
1.2V
-10%
1.2V
0.8V
0.6V
0.8V
0.6V
SS/EN
-
+
SS/EN
-
+
ERROR AMP
ERROR AMP
-
+
-
+
+
-
+
-
+
-
+
-
SET DOMINATES
HICCUP LATCH
SET DOMINATES
HICCUP LATCH
VBG
VBG
-
+
S
R
-
+
S
R
PWM
PWM
SC1109B
+
-
UVLO
+
-
UVLO
Q
Q
OSCILLATOR
CHARGE
PUMP
OSCILLATOR
CHARGE
PUMP
5
5VSTBY
5VSTBY
OSCILLATOR
OSCILLATOR
5VSTBY
5VSTBY
FAULT
FAULT
R
S
R
S
OVER
CURRENT
OVER
CURRENT
Q
Q
+
-
200mV
+
-
SC1109CS
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xxxxx
LOW SIDE OFF
LOW SIDE OFF
VBG
VBG
VBG
VBG
160uA
SHOOT
THRU
CONTROL
SHOOT
THRU
CONTROL
+
-
+
-
+
-
+
-
HIGH
SIDE
DRIVE
LOW
SIDE
DRIVE
5VSTBY
5VSTBY
HIGH
SIDE
DRIVE
LOW
SIDE
DRIVE
5VSTBY
5VSTBY
VCC
VCC
SC1109C
OCSET
BST
DH
PHASE
DL
GND
GATE2
LDOS2
GATE1
LDOS1
BST
DH
PHASE
DL
GND
GATE2
LDOS2
GATE1
LDOS1
www.semtech.com
SC1109