rt9259 Richtek Technology Corporation, rt9259 Datasheet - Page 2

• Manufacturer Part Number: rt9259
• Description: Synchronous Buck Dc-dc Linear Power Controller
• Manufacturer: Richtek Technology Corporation

RT9259
Pin Configurations
Typical Application Circuit
Functional Pin Description
www.richtek.com
2
RT9259 S RT9259 A RT9259PQV
RT_DIS
COMP
BOOT
GND
DRV
FBL
1
2
3
4
5
FB
SOP-14
5
6
7
2
3
4
Pin No.
1
2
3
4
5
14
13
12
11
10
9
8
UGATE
PHASE
PGND
LGATE
NC
NC
VCC12
15
16
1
2
3
Q3
Pin Name
BOOT
RT_DIS
COMP
DRV
FB
RT_DIS
COMP
BOOT
BOOT
VCC12
DRV
FBL
RT_DIS
GND
NC
NC
GND
GND
DRV
FBL
FB
(TOP VIEW)
RT9259
Buck converter external compensation. This pin is used to
Bootstrap supply for the upper gate driver. Connect the
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
addition, if this pin is pulled down towards GND, it will disable
both regulator outputs until released.
compensate the control loop of the buck converter.
of the PWM error amplifier. FB senses the switcher output
through an external resistor divider network.
Connect this pin to the gate of an external MOSFET. This pin
provides the drive for the linear regulator’s pass MOSFET.
Buck converter feedback voltage. This pin is the inverting input
SSOP-16
UGATE
PHASE
2
3
4
5
6
7
8
LGATE
COMP
PGND
FB
16
15
14
13
12
11
10
9
UGATE
PHASE
PGND
LGATE
NC
NC
VCC12
VCC12
Q2
Q1
Pin Function
C
COMP
IN
DRV
FBL
DS9259-03T00 August 2007
FB
1
2
3
4
VQFN-16L 4x4
16
5
15
6
14
7
To be continued
17
13
8
12
11
10
9
PGND
LGATE
NC
NC