Si9177 Datasheet, PDF (4/9 Pages) Vishay Siliconix – 200-mA PSM Step Down Converter with Bypass Capability

Si9177
Vishay Siliconix
New Product
FUNCTIONAL BLOCK DIAGRAM
V_IN
V_IN
REF
BP/PSM
Reference
Generator
ENABLE
NC
+
F_B
-
UVLO POR
BP
PSM/BP
L_X
PSM
Controller
Driver
L_X
V_ADJ
Turn-On
Control
Zero Current
Detect
+
-
Turn off Control
+
-
Peak Current
Comparater
0.6 A
GND
APPLICATION CIRCUIT
V_IN
C_IN
10 mF
ON/OFF
BP/PSM
www.vishay.com
4
1
V_IN
2 _VIN
10
L_X
9
L_X
SI9177
8
GND
3
ENABLE
4 _BP/PSM
5 _NC
F_B ⁷
6
REF
MLP33-10
1.5 mH
C_OUT
10 mF
C_REF
V_OUT
R₁
R₂
Document Number: 70312
S-03663—Rev. B, 07-Apr-03