SC1485ITSTRT Semtech, SC1485ITSTRT Datasheet - Page 7

• Manufacturer Part Number: SC1485ITSTRT
• Description: IC PWM BUCK CTRLR DUAL 28TSSOP
• Manufacturer: Semtech
• Type: Step-Down (Buck)r

Specifications of SC1485ITSTRT

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.5 ~ 25 V
• Voltage - Input: 1.8 ~ 25 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Frequency - Switching: -
• Other names: SC1485ITSTR

POWER MANAGEMENT
Block Diagram
2005 Semtech Corp.
VCCA1 (25)
EN/SPV1 (22)
TON1 (23)
VOUT1 (24)
FB1 (26)
PGD1 (27)
VSSA1 (28)
VCCA2 (11)
EN/SPV2 (8)
TON2 (9)
VOUT2 (10)
FB2 (12)
PGD2 (13)
VSSA2 (14)
POR / SS
1.5V REF
POR / SS
1.5V REF
NOT RECOMMENDED FOR NEW DESIGN
X3
X3
TON
TOFF
TON
TOFF
+
-
+
-
FAULT
MONITOR
FAULT
MONITOR
OT
OT
FIGURE 1.
7
ON
OFF
PWM
REF + 10%
REF - 10%
REF - 30%
ON
OFF
PWM
REF + 10%
REF - 10%
REF - 30%
ZERO I
OV
UV
ZERO I
OV
UV
OC
OC
CONTROL
LOGIC
CONTROL
LOGIC
ISENSE
ISENSE
HI
LO
HI
LO
BST1 (7)
DH1 (6)
LX1 (5)
ILIM1 (4)
VDDP1 (3)
DL1 (2)
PGND1 (1)
BST2 (21)
DH2 (20)
LX2 (19)
ILIM2 (18)
VDDP2 (17)
DL2 (16)
PGND2 (15)
SC1485
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