RT9953 RICHTEK [Richtek Technology Corporation], RT9953 Datasheet - Page 12

• Manufacturer Part Number: RT9953
• Description: 4+1 CH Power Management IC
• Manufacturer: RICHTEK [Richtek Technology Corporation]

V
V
RT9953
www.richtek.com
12
(5mV/Div)
(5mV/Div)
OUT_CH3_ac
OUT_CH2_ac
CH4 Step-Down Output Voltage vs. Output Current
(2V/Div)
(2V/Div)
LX3
LX2
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
CH2 Step-Down Output Voltage Ripple
0
100
CH3 Output Voltage Ripple
V
I
V
I
OUT
OUT
DDM
DDM
= 300mA, L2 = 2.2μH, C5 = 10μF
= 300mA, L3 = 4.7μH, C8 = 10μF
Output Current (mA)
200
= 5V, V
= 5V, V
Time (500ns/Div)
Time (500ns/Div)
BAT
BAT
300
= 3.7V, V
= 3.7V, V
400
OUT_CH2
OUT_CH3
V
V
BAT
BAT
V
500
DDM
= 1.8V,
= 1.2V,
= 4.5V
= 5V
= 5V
600
V
V
(10mV/Div)
V
(10mV/Div)
(5mV/Div)
OUT_CH2_ac
OUT_CH4_ac
OUT_CH1_ac
(2V/Div)
(2V/Div)
(2V/Div)
LX2
LX4
LX1
CH2 Step-Up Output Voltage Ripple
CH1 Output Voltage Ripple
CH4 Output Voltage Ripple
V
I
V
I
OUT
OUT
DDM
DDM
V
I
OUT
DDM
= 300mA, L2 = 2.2μH, C5 = 10μFx2
= 300mA, L4 = 4.7μH, C11 = 10μF
= 3V, V
= 5V, V
= 300mA, L1 = 2.2μH, C2 = 10μFx2
Time (500ns/Div)
Time (500ns/Div)
Time (500ns/Div)
= 5V, V
BAT
BAT
BAT
DS9953-02 April 2011
= 1.8V, V
= 4.2V, V
= 3.7V, V
OUT_CH2
OUT_CH4
OUT_CH1
= 3.3V,
= 3.3V,
= 5V,