lv5781 Sanyo Semiconductor Corporation, lv5781 Datasheet - Page 4

• Manufacturer Part Number: lv5781
• Description: 3a, Point-of-load, Chopper-type Step-down Converter
• Manufacturer: Sanyo Semiconductor Corporation

Pin Assignment and Sample Application Circuits
*The capacitor between the FB0 and V OUT pins and capacitor between the OERRAMP pin and GND (the capacitors
shown inside the broken lines in the diagram) are used for phase compensation. Their capacitance is intended to stop
oscillation when oscillation is caused by the status of the output capacitor. As such, they can be left open under normal
circumstances.
OFF
OFF
ON
ON
Sample Application Circuit 1
Sample Application Circuit 2
G
N
D
1
4
6
7
2
3
5
G
N
D
1
4
6
7
2
3
5
FB_GND
SS
SW
PGND
ENABLE
FB1
V IN
FB_GND
SW
PGND
ENABLE
SS
FB1
V IN
LV5781
OERRAMP
OERRAMP
CBOOT
CBOOT
FB0
FB2
V IN
SW
V IN
FB0
FB2
V IN
SW
V IN
12
14
13
11
10
G
N
D
8
9
12
14
13
11
10
G
N
D
9
8
3.3V
V OUT
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