RT9953 RICHTEK [Richtek Technology Corporation], RT9953 Datasheet - Page 10

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

www.richtek.com
10
RT9953
Typical Operating Characteristics
CH3 Step-Down Efficiency vs. Output Current
CH2 Step-Down Efficiency vs. Output Current
100
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
CH1 Step-Up Efficiency vs. Output Current
0
0
0
10
10
10
V
V
V
V
V
V
BAT
BAT
BAT
BAT
BAT
BAT
V
V
V
V
V
V
BAT
BAT
BAT
BAT
BAT
BAT
= 2.7V
= 3.3V
= 3.6V
= 3.9V
= 4.2V
= 4.5V
= 1.8V
= 3V
= 3.3V
= 3.6V
= 4.2V
= 4.5V
Output Current (mA)
Output Current (mA)
Output Current (mA)
V
L2 = 4.7 H, C5 = 10 F
V
L3 = 4.7 H, C8 = 10 F
100
100
DDM
DDM
100
V
L1 = 2.2 H, C2 = 10 Fx2
DDM
= 5V, V
= 5V, V
= 5V, V
V
V
V
V
V
V
BAT
BAT
BAT
BAT
BAT
BAT
OUT_CH2
OUT_CH3
OUT_CH1
= 4.5V
= 4.2V
= 3.9V
= 3.6V
= 3.3V
= 3V
= 1.2V,
= 1.8V,
= 5V,
1000
1000
1000
CH3 Step-Down Efficiency vs. Output Current
100
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
CH1 Step-Up Efficiency vs. Output Current
90
80
70
60
50
40
30
20
10
CH2 Step-Up Efficiency vs. Output Current
0
0
0
10
10
10
V
V
V
V
V
V
BAT
BAT
BAT
BAT
BAT
BAT
= 1.8V
= 2.5V
= 3V
= 3.3V
= 3.6V
= 4.5V
Output Current (mA)
Output Current (mA)
Output Current (mA)
V
L2 = 2.2 H, C5 = 10 Fx2
V
L3 = 4.7 H, C8 = 10 F
100
100
100
DDM
DDM
V
L1 = 2.2 H, C2 = 10 Fx2
V
V
V
V
V
V
DS9953-02 April 2011
DDM
BAT
BAT
BAT
BAT
BAT
BAT
= 3V, V
= 5V, V
= 3V, V
= 3.4V
= 3V
= 2.7V
= 2.5V
= 2.2V
= 1.8V
V
V
V
V
V
V
BAT
BAT
BAT
BAT
BAT
BAT
= 3V
= 2.7V
= 2.5V
= 2.2V
= 2V
= 1.8V
OUT_CH2
OUT_CH3
OUT_CH1
= 3.3V,
= 1.2V,
= 5V,
1000
1000
1000