sc172mltrt Semtech Corporation, sc172mltrt Datasheet - Page 24

• Manufacturer Part Number: sc172mltrt
• Description: 2a Ecospeed Synchronous Step-down Regulator With Optional Ultrasonic Power Save
• Manufacturer: Semtech Corporation

Typical Application Circuits
VOUT+
VOUT+
VOUT-
VOUT-
© 2010 Semtech Corporation
VIN+
VIN+
VIN-
VIN-
22uF/6.3v
C2
10uF/6.3V
10uF/6.3V
22uF/6.3v
Application Circuit: Buck Converter with 3.3V out and 0 to 2A load current (Vin=5V)
Application Circuit: Buck Converter with 1.2V out and 0 to 2A load current (Vin= 5V)
C1
C1
C6
C6
22uF/6.3v
0.1uF/6.3V
0.1uF/6.3V
C101
C101
FB
FB
38p
38p
C10
C10
15k
15k
R2
R2
9.09k
51.1k
R6
R6
68pF
68pF
C18
C18
2.0uH
2.0uH
2.49k
10.5k
L1
C19
L1
C19
10n
10n
R5
R5
R4
R4
100k
100k
1uF/6.3V
1uF/6.3V
C4
C4
PGOOD
PGND
PGND
PGOOD
BST
VIN
VIN
BST
LX
LX
SC172
SC172
EN/PSV
EN/PSV
AGND
AGND
VDD
TON
TON
VDD
FB
FB
5.11Ohm
5.11Ohm
R1
R1
10uF/6.3V
10uF/6.3V
C5
24.9k
90.9k
C5
R3
R3
0.1uF/6.3V
0.1uF/6.3V
C501
C501
FB
FB
Enable
Enable
24