DS8409 Datasheet, PDF (2/11 Pages) Richtek Technology Corporation – Green Mode Buck Converter

RT8409
Typical Application Circuit
F1
D1
D2
C_IN
R_START
D3
D4
X
R2A
C1 R2B
3 _FB
2 _COMP
5, 6
DRAIN
VCC ⁸
RT8409
SENSE ⁴
R1 _{1 SGND}
C5
C2
R3
D8
X
R2
C3
D7
Bootstrap diode
L1
V_OUT
D5
C4 R4
Functional Pin Description
Pin No. Pin Name
Pin Function
1 SGND Signal ground of the chip.
2 COMP Close loop compensation node.
3 FB
Error amplifier input.
4 SENSE Current sense input.
5, 6 DRAIN Internal MOSFET drain.
7 NC
No internal connection.
8 VCC
Supply voltage input of the chip. For good bypass, a ceramic capacitor near the VCC pin is
required.
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DS8409-00 September 2016