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  Richtek Technology Electronic Components Datasheet  

RT8106A Datasheet

5V/12V Synchronous Buck PWM DC-DC Controller

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RT8106/A
5V/12V Synchronous Buck PWM DC-DC Controller
General Description
The RT8106/A is a DC/DC synchronous buck PWM
controller with embedded driver support up to 12V+12V
boot-strapped voltage for high efficiency power driving. The
part integrates full functions of voltage regulation, power
monitoring and protection into a single small footprint
WDFN-10L 3x3 (Exposed Pad) package.
The RT8106/A adopts a high-gain voltage mode PWM
control for simple application design. An internal 0.8V
reference allows the output voltage to be precisely
regulated for low voltage requirement. Based on all
RT8106/A features, the part provides an optimum
compromise between efficiency, total B.O.M. count, and cost.
Ordering Information
RT8106/A
Package Type
QW : WDFN-10L 3x3 (W-Type)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
600kHz
300kHz
Note :
Richtek 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.
Features
z Single 5 to 12V Bias Supply
z Drive All Low Cost N-MOSFETs
z Support High Current Application up to 30A
z High-Gain Voltage Mode PWM Control
z 300kHz/600kHz Fixed Frequency Oscillator
z Fast Transient Response :
` High-Speed EA Amplifier
` 0 to 85% Duty Ratio
` External Compensation in The Control Loop
z Internal Soft-Start
z Adaptive Non-Overlapping Gate Driver
z Over Current Fault Monitor on low side MOSFET
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Graphic Card
z Motherboard, Desktop Servers
z IA and Telecom Equipment
z General High Power DC/DC Regulator
Pin Configurations
(TOP VIEW)
BOOT 1
LX 2
UGATE 3
LGATE 4
GND 5
GND
11
10 PGOOD
9 VOS
8 FB
7 COMP/EN
VCC
WDFN-10L 3x3
Marking Information
RT8106GQW
DY=YM
DNN
DY= : Product Code
YMDNN : Date Code
RT8106AGQW
EP=YM
DNN
EP= : Product Code
YMDNN : Date Code
DS8106/A-04 April 2011
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT8106A Datasheet

5V/12V Synchronous Buck PWM DC-DC Controller

No Preview Available !

RT8106/A
RT8106ZQW
DY YM
DNN
DY : Product Code
YMDNN : Date Code
RT8106AZQW
EP YM
DNN
EP : Product Code
YMDNN : Date Code
Typical Application Circuit
VGD
VIN
VCC
PGOOD
EN
ROFFSET
6
VCC
RT8106/A
BOOT
1
CBP
10 PGOOD
UGATE 3
LX 2
7 COMP/EN
LGATE 4
Rf
CP
Cf
FB 8
VOS 9
GND
5, Exposed Pad (11)
D1
RBOOT
RUGATE
CBOOT
Q1
C4
L1
ROCSET
Q2
R7
C7 RFB
ROFFSET
RFB
VOUT
RL
RB
CB
COUT
Functional Pin Description
Pin No.
Pin Name
1 BOOT
2 LX
3 UGATE
4 LGATE
5,
11 (Exposed Pad)
GND
6 VCC
7 COMP/EN
8 FB
9 VOS
10 PGOOD
Pin Function
This pin is boot-strapped by external capacitor and is applied for the embedded
High Side gate driver power.
Phase node of PWM.
High Side gate drive.
Low Side gate drive. It also acts as OC setup pin by adjusting a resistor
connecting to GND.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
VCC is generally applied for bias power for IC logics and gate driver control. To
connect a 1μF bypass capacitor to GND is recommended.
Compensation pin of PWM and Output of the PWM error amplifier. Connect
compensation network between this pin and FB. This pin is also applied as
Enable pin.
PWM Feedback. The output feedback of PWM. The pin is applied for voltage
regulation.
The pin is scaled to be 0.8v and provides under voltage protection, over voltage
protection and PGOOD function.
This pin is an open drain driver and Indicates PWM output regulated in +/-10%.
www.richtek.com
2
DS8106/A-04 April 2011


Part Number RT8106A
Description 5V/12V Synchronous Buck PWM DC-DC Controller
Maker Richtek
Total Page 14 Pages
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