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RT9259C View Datasheet(PDF) - Richtek Technology

Part Name
Description
MFG CO.
RT9259C Datasheet PDF : 15 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
RT9259C
Pin Configurations
(TOP VIEW)
BOOT
RT_DIS 2
COMP 3
FB 4
DRV 5
FBL 6
GND 7
14 UGATE
13 PHASE
12 PGND
11 LGATE
10 NC
9 NC
8 VCC12
BOOT
RT_DIS 2
COMP 3
FB 4
DRV 5
FBL 6
GND 7
GND 8
16 UGATE
15 PHASE
14 PGND
13 LGATE
12 NC
11 NC
10 VCC12
9 VCC12
16 15 14 13
COMP 1
12 PGND
FB 2
DRV 3
FBL 4
11 LGATE
10 NC
17
9 NC
5678
SOP-14
Typical Application Circuit
VCC
+12V
VIN2
+5V to +12V
Q3
VOUT2
COUT2
SSOP-16
RT9259C
BOOT
VCC12
DRV
UGATE
PHASE
FBL
LGATE
RT_DIS
GND
NC
NC
PGND
FB
COMP
VQFN-16L 4x4
VIN1
+3.3V/+5V/+12V
CIN
Q1 LOUT
1
VOUT1
Q2
COUT
Functional Pin Description
Pin No.
Pin
RT9259C…S RT9259C…A RT9259CPQV Name
Pin Function
Bootstrap supply for the upper gate driver. Connect the
1
1
15
BOOT
bootstrap capacitor between BOOT pin and the PHASE pin.
The bootstrap capacitor provides the charge to turn on the
upper MOSFET.
Connect a resistor from RT_DIS to GND to set frequency. In
2
2
16
RT_DIS addition, if this pin is pulled down towards GND, it will disable
both regulator outputs until released.
3
3
1
COMP
Buck converter external compensation. This pin is used to
compensate the control loop of the buck converter.
Buck converter feedback voltage. This pin is the inverting
4
4
2
FB
input of the PWM error amplifier. FB senses the switcher
output through an external resistor divider network.
5
5
3
DRV
Connect this pin to the gate of an external MOSFET. This pin
provides the drive for the linear regulators pass MOSFET.
To be continued
www.richtek.com
2
DS9259C-03 August 2007
 

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