SI9174 Datasheet, PDF (4/17 Pages) Vishay Siliconix – High Performance Step-Down DC-DC Converter With Dynamically Adjustable Output Voltage

Si9174
Vishay Siliconix
PIN CONFIGURATION
L_X
1
AGND
2
FB
3
V_DD
4
DAC
5
MSOP-10
Top View
10 PGND
9
V_IN
8
SYNC
7
SD
6
MODE
MLP33
L_X
AGND
2
FB
3
V_DD
4
DAC
5
10
PGND
9
V_IN
8
SYNC
7
SD
6
MODE
Top View
PIN DESCRIPTION
Pin Number
Name
1
L_X
2
AGND
3
FB
4
V_DD
5
DAC
6
MODE
7
SD
8
SYNC
9
V_IN
10
PGND
Function
Inductor connection
Low power analog ground
Output voltage feedback
Input supply voltage for the analog circuit.
Voltage from external DAC to adjust output voltage.
Used to select switching mode of the buck converter
PWM/PSM Pin Logic:
MODE Pin
V_IN
Open
GND
Operating Mode
PWM
PSM
AUTO
Logic low disables IC and reduces quiescent current to below 2 mA
Converter switching frequency can be synchronized to ¹/₆ of the clock frequency at this pin.
Input supply voltage
Low impedance power ground
ORDERING INFORMATION
MSOP-10
Standard
Part Number Marking Temperature
Si9174DH-T1
9174
−40 to 85_C
Additional voltage options are available.
Standard
Part Number
Si9174DM-T1
MLP33
Lead (Pb)-Free
Part Number Marking
Si9174DM-T1—E3
9174
Temperature
−40 to 85_C
Eval Kit
Si9174DB
Temperature Range
−40 to 85_C
Board
Surface Mount
www.vishay.com
4
Document Number: 71668
S-41148—Rev. C, 14-jun-04