RT9953 RICHTEK [Richtek Technology Corporation], RT9953 Datasheet - Page 5

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

Functional Pin Description
DS9953-02 April 2011
25 (Exposed Pad)
Pin No.
23,
10
12
13
14
15
16
17
18
19
20
21
22
24
11
1
2
3
4
5
6
7
8
9
LX1
PVDD1
EN3
FB4
SS
PVDD4
LX4
EN5
VOUT5
FB5
PVDD5
LX3
PVDD3
EN2
FB3
VDDM
PVDD2
LX2
SEL
EN4
FB2
FB1
GND
EN1
Pin Name
Switch Node of CH1. High impedance in shutdown mode.
Power Input of CH1.
Enable Control Input of CH3.
Feedback Input of CH4. High impedance in shutdown mode.
Soft-Start Control Input.
Power Input of CH4.
Switch Node of CH7. High impedance in shutdown mode.
Enable Control Input of CH5.
Output Voltage of CH5.
Feedback Input of CH5. High impedance in shutdown mode.
Power Input of CH5.
Switch Node of CH3. High impedance in shutdown mode.
Power Input of CH3.
Enable Control Input of CH2.
Feedback Input of CH3. High impedance in shutdown mode.
Analog Power Input.
Power Input of CH2.
Switch Node of CH2. High impedance in shutdown mode.
Selection Input for CH2 step-up or step-down operation mode. Logic state can
not be changed during operation.
Enable Control Input of CH4.
Feedback Input of CH2. High impedance in shutdown mode.
Feedback Input of CH1. High impedance in shutdown mode.
Ground Pin. The exposed pad must be soldered to a large PCB and connected to
GND for maximum thermal dissipation.
Enable Control Input of CH1.
Pin Function
RT9953
www.richtek.com
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