RT9259C 반도체 회로 부품 판매점
12V Synchronous Buck PWM DC-DC and Linear Power Controller
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 Richtek Technology |
RT9259C
12V Synchronous Buck PWM DC-DC and Linear Power Controller
General Description
The RT9259C is a dual-channel DC/DC controller
specifically designed to deliver high quality power where
12V power source is available. This part consists of a
synchronous buck controller and an LDO controller. The
synchronous buck controller integrates MOSFET drivers
that support 12V+12V bootstrapped voltage for high
efficiency power conversion. The bootstrap diode is built-
in to simplify the circuit design and minimize external part
count. The LDO controller drives an external N-MOSFET
for lower power requirement.
Other features include adjustable operation frequency,
internal soft start, under voltage protection, over current
protection and shut down function. With the above
functions, this part provides customers a compact, high
efficiency, well-protected and cost-effective solution. This
part comes to VQFN-16L 4x4, SOP14 and SSOP-16
packages.
Ordering Information
RT9259C
Package Type
S : SOP-14
A : SSOP-16
QV : VQFN-16 4x4 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richtek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
Features
z Single 12V Bias Supply
z Support Dual Channel Power Conversion
`One Synchronous Rectified Buck PWM Controller
`One Linear Controller
z Both Controllers Drive Low Cost N-MOSFETs
z Adjustable Frequency from 150kHz to 1MHz
and Free-Run Frequency at 230kHz
z Small External Component Count
z ±1% High Accuracy Output Voltage Regulation for
Both PWM and LDO Controller
z Two Internal VREF Power Support Lower to 0.8V
z Adjustable External Compensation
z Linear Controller Drives N-MOSFET Pass
Transistor
z Fully-Adjustable Outputs
z Under Voltage Protection for Both Outputs
z Over Current Fault Monitor on MOSFET; No Current
Sense Resistor is Required.
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Graphic Card GPU, Memory Core Power
z Graphic Card Interface Power
z Motherboard, Desktop and Servers Chipset and Memory
Core Power
z IA Equipments
z Telecomm Equipments
z High Power DC-DC Regulators
Marking Information
For marking information, contact our sales representative
www.DataSheet4U.com
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
DS9259C-03 August 2007
www.richtek.com
1
RT9259C
Pin Configurations
(TOP VIEW)
BOOT
RT_DIS
COMP
FB
DRV
FBL
GND
2
3
4
5
6
7
14 UGATE
13 PHASE
12 PGND
11 LGATE
10 NC
9 NC
8 VCC12
BOOT
RT_DIS
COMP
FB
DRV
FBL
GND
GND
2
3
4
5
6
7
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
DRV
FBL
2
3
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
11
22
33
www.DataSheet4U.com
44
55
Bootstrap supply for the upper gate driver. Connect the
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
16 RT_DIS addition, if this pin is pulled down towards GND, it will disable
both regulator outputs until released.
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
2 FB input of the PWM error amplifier. FB senses the switcher
output through an external resistor divider network.
3
DRV
Connect this pin to the gate of an external MOSFET. This pin
provides the drive for the linear regulator’s pass MOSFET.
To be continued
www.richtek.com
2
DS9259C-03 August 2007
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제조업체: Richtek Technology
( richtek )
RT9259C controller
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[ RT9259C.PDF ]
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
RT9259
12V Synchronous Buck PWM DC-DC and Linear Power Controller - Richtek Technology
RT9259A
12V Synchronous Buck PWM DC-DC and Linear Power Controller - Richtek Technology
RT9259C
12V Synchronous Buck PWM DC-DC and Linear Power Controller - Richtek Technology