RT8223A 반도체 회로 부품 판매점
(RT8223A/B) Main Power Supply Controller
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 Richtek |
RT8223A/B
High Efficiency, Main Power Supply Controller
for Notebook Computers
General Description
Features
The RT8223A/B dual step-down, switch-mode power-
supply controller generates logic-supply voltages in
battery-powered systems. The RT8223A/B includes two
pulse-width modulation (PWM) controllers fixed at 5V/
3.3V or adjustable from 2V to 5.5V. This device also
features 2 linear regulators providing fixed 5V and 3.3V
outputs. The linear regulator each provides up to 70mA
output current with automatic linear-regulator bootstrapping
to the PWM outputs. The RT8223A/B includes on-board
power-up sequencing, the power good output, internal soft-
start, and internal soft-discharge output that prevents
negative voltages on shutdown.
A constant on-time PWM control scheme operates without
sense resistor and provides 100ns response to load
transients while maintaining a relatively constant switching
frequency. The unique ultrasonic mode maintains the
switching frequency above 25kHz, which eliminates noise
in audio applications. Other features include diode-
emulation mode (DEM), which maximizes efficiency in
light-load applications, and fixed-frequency PWM mode,
which reduces RF interference in sensitive application
z Wide Input Voltage Range 6V to 25V
z Dual Fixed 5V/3.3V Outputs or Adjustable from 2V
to 5.5V, 1.5% Accuracy
z Fixed 3.3V and 5V LDO Output : 70mA
z 2V Reference Voltage ±1% : 50μA
z Constant ON-Time Control with 100ns Load Step
Response
z Frequency Selectable via TONSEL Setting
z RDS(ON) Current Sensing and Programmable Current
Limit combined with Enable Control
z Selectable PWM, DEM, or Ultrasonic Mode
z Internal Soft-Start and Soft-Discharge
z High Efficiency up to 97%
z 5mW Quiescent Power Dissipation
z Thermal Shutdown
z RoHS Compliant and Halogen Free
Applications
Notebook and Sub-Notebook Computerszhttp://www.DataSheet4U.net/
z 3-Cell and 4-Cell Li+ Battery-Powered Devices
Marking Information
Ordering Information
RT8223
Package Type
QW : WQFN-24L 4x4 (W-Type)
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Pin Function
A : Default
B : With ENC
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.
DS8223A/B-04 April 2011
www.richtek.com
1
datasheet pdf - http://www.DataSheet4U.net/
RT8223A/B
Pin Configurations
(TOP VIEW)
ENTRIP1
FB1
REF
TONSEL
FB2
ENTRIP2
24 23 22 21 20 19
1 18
2 17
3 16
GND
4 15
5 25 14
6 13
7 8 9 10 11 12
NC
VREG5
VIN
PGND
SKIPSEL
EN
ENTRIP1
FB1
REF
TONSEL
FB2
ENTRIP2
24 23 22 21 20 19
1 18
2 17
3 16
GND
4 15
5 25 14
6 13
7 8 9 10 11 12
ENC
VREG5
VIN
PGND
SKIPSEL
EN
RT8223A
WQFN-24L 4x4
RT8223B
WQFN-24L 4x4
Typical Application Circuit
For Fixed Voltage Regulator
VOUT1
5V
C3
220µF
C1
10µF
R7
3.9
C6
0.1µF
L1
6.8µH
R5
C4
Q1
BSC119
N03S
R4 0
R3 0
C2
0.1µF
Q3
BSC119
N03S
C11
0.22µF
Frequency Control
PWM/DEM/Ultrasonic
ON
OFF
VIN
16 VIN
RT8223A
UGATE2 10
R9
0
Q2
BSC119
C9
10µF
C8
10µF
BOOT2 9
R8 0
N03S
21 UGATE1
22 BOOT1
20 PHASE1
19 LGATE1
24 VOUT1
3 REF
4 TONSEL
http://www.DataSheet4U.net/
PHASE2 11
LGATE2 12
PGND 15
VOUT2 7
VREG5 17
PGOOD 23
VREG3 8
ENTRIP1 1
C7
0.1µF
L2
4.7µH
Q4
BSC119
N03S
R10
C10
VOUT2
3.3V
C13
220µF
C5
4.7µF
C12
4.7µF
R6
100k
R1
150k
5V Always On
PGOOD Indicator
3.3V Always On
14 SKIPSEL
13 EN
ENTRIP2 6
R2
150k
2 FB1
5 FB2
Exposed Pad (25)
GND
www.richtek.com
2
DS8223A/B-04 April 2011
datasheet pdf - http://www.DataSheet4U.net/
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PDF 파일 내의 페이지 : 총 26 페이지
제조업체: Richtek
( richtek )
RT8223A controller
데이터시트 다운로드 :
[ RT8223A.PDF ]
[ RT8223A 다른 제조사 검색 ]
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
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