SI9176_04 Datasheet, PDF (8/17 Pages) Vishay Siliconix – High Performance Step-Down DC-DC Converter With Adjustable Output Voltage

Si9176
Vishay Siliconix
TYPICAL CHARACTERISTICS
100
95
90
85
80
75
70
0
Auto Mode Efficiency vs. Load
V_IN = 3.6 V
V_OUT = 3.0 V
V_OUT = 1.9 V
100 200 300 400 500 600
Load Current (mA)
100
95
90
85
80
75
0
PSM vs. PWM Efficiency
PSM
PWM
100 200 300 400 500 600
Load Current (mA)
100
95
90
85
80
75
0
Auto Mode Efficiency vs. Load Direction
Load Decreasing
Load Increasing
100 200 300 400 500 600
Load Current (mA)
Dropout Voltage vs. I_LOAD
200
160
V_IN = 2.6 V
120
V_IN = 3.6 V
80
V_IN = 5.5 V
40
0
0
100 200 300 400 500 600
Load Current (mA)
100
80
60
40
20
0
0
V_OUT Ripple
PSM
V_IN = 3.6 V
V_OUT = 1.9 V
C_OUT = 4.7 mF
PWM
30
60
90
120
150
Load Current (mA)
www.vishay.com
8
Document Number: 71753
S-41148—Rev. C, 14-Jun-04