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Richtek
Richtek

RT8223M Datasheet

(RT8223L/M) Main Power Supply Controller


RT8223M Datasheet Preview


RT8223L/M
High Efficiency, Main Power Supply Controller
for Notebook Computer
General Description
The RT8223L/M is a dual step-down, switch-mode power
supply controller generating logic-supply voltages in
battery-powered systems. It includes two Pulse Width
Modulation (PWM) controllers adjustable from 2V to 5.5V,
and also features fixed 5V/3.3V linear regulators. Each
linear regulator provides up to 100mA output current with
automatic linear regulator bootstrapping to the PWM
outputs. The RT8223L/M includes on-board power up
sequencing, a power good output, internal soft-start, and
soft-discharge output that prevents negative voltage during
shutdown.
The constant on-time PWM scheme can operate without
sense resistors and provide 100ns load transient response
while maintaining nearly constant switching frequency. To
eliminate noise in audio applications, an ultrasonic mode
is included, which maintains the switching frequency
above 25kHz. Moreover, the diode-emulation mode
maximizes efficiency for light load applications. The
RT8223L/M is available in a WQFN-24L 4x4 package.
Ordering Information
RT8223
Package Type
QW : WQFN-24L 4x4 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Pin Function
L : Default
M : 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.
Features
z Constant On-time Control with 100ns Load Step
Response
z Wide Input Voltage Range : 6V to 25V
z Dual Adjustable Outputs from 2V to 5.5V
z Fixed 3.3V and 5V LDO Output : 100mA
z 2V Reference Voltage
z Frequency Selectable via TONSEL Setting
z 4700ppm/°C RDS(ON) Current Sensing
z 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
http://www.DataSheet4U.net/
z Notebook and Sub-Notebook Computers
z 3-Cell and 4-Cell Li+ Battery-Powered Devices
DS8223L/M-04 April 2011
www.richtek.com
1
datasheet pdf - http://www.DataSheet4U.net/
Page 1

RT8223L/M
Marking Information
RT8223LGQW
EP= : Product Code
EP=YM
DNN
YMDNN : Date Code
RT8223LZQW
EP : Product Code
EP YM
DNN
YMDNN : Date Code
RT8223MGQW
EQ= : Product Code
EQ=YM
DNN
YMDNN : Date Code
RT8223MZQW
EQ YM
DNN
EQ : Product Code
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
24 23 22 21 20 19
ENTRIP1 1
18 NC
FB1 2
17 VREG5
REF 3
TONSEL 4
GND
16 VIN
15 GND
FB2 5
25 14 SKIPSEL
ENTRIP2 6
13 EN
7 8 9 10 11 12
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24 23 22 21 20 19
ENTRIP1 1
18 ENC
FB1 2
17 VREG5
REF 3
TONSEL 4
GND
16 VIN
15 GND
FB2 5
25 14 SKIPSEL
ENTRIP2 6
13 EN
7 8 9 10 11 12
WQFN-24L 4x4
RT8223L
WQFN-24L 4x4
RT8223M
www.richtek.com
2
DS8223L/M-04 April 2011
datasheet pdf - http://www.DataSheet4U.net/
Page 2

Typical Application Circuit
RT8223L/M
VOUT1
5V
C3
220µF
C18
C19
0.1µF
C1
10µF
R8
3.9
C10
0.1µF
L1
6.8µH
Q1
BSC119
N03S
R4 0
RBOOT1 0
C2
0.1µF
R5
Q3
BSC119
C4 N03S
R12
15k
R13 VREF
10k
2V C15
0.22µF
Frequency Control
PWM/DEM/Ultrasonic
ON
OFF
16 VIN
RT8223L
UGATE2 10
R10
0
21 UGATE1
BOOT2 9
0
RBOOT2
PHASE2 11
C11
0.1µF
22 BOOT1
LGATE2 12
20 PHASE1
19 LGATE1
24 VOUT1
2 FB1
3 REF
GND 15
VOUT2 7
FB2 5
ENTRIP1 1
ENTRIP2 6
RILIM1
150k
RILIM2
150k
25 (Exposed Pad)
GND
Q2
BSC119
N03S
Q4
BSC119
N03S
C13
10µF
VIN
6V to 25V
C12
10µF
L2
4.7µH
R11
C14
VOUT2
3.3V
C17
220µF
R14 C21
6.5k
C20
R15 0.1µF
10k
4 TONSEL
14 SKIPSEL
13 EN
VREG5 17
PGOOD 23
VREG3 8
C9
4.7µF
C16
4.7µF
R6
100k
5V Always On
PGOOD Indicator
3.3V Always On
VOUT1
5V
C3
220µF
C18
C19
0.1µF
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C1
10µF
R8
3.9
C10
0.1µF
L1
6.8µH
Q1
BSC119
N03S
R4 0
0
C2 RBOOT1
0.1µF
R5
Q3
BSC119
C4 N03S
R12
15k
R13 VREF
10k
2V C15
0.22µF
Frequency Control
PWM/DEM/Ultrasonic
ON
OFF ON
OFF
16 VIN
RT8223M
UGATE2 10
R10
0
21 UGATE1
BOOT2 9
0
RBOOT2
PHASE2 11
C11
0.1µF
22 BOOT1
LGATE2 12
20 PHASE1
19 LGATE1
24 VOUT1
2 FB1
3 REF
GND 15
VOUT2 7
FB2 5
ENTRIP1 1
ENTRIP2 6
RILIM1
150k
RILIM2
150k
GND 25 (Exposed Pad)
Q2
BSC119
N03S
Q4
BSC119
N03S
C13
10µF
VIN
6V to 25V
C12
10µF
L2
4.7µH
R11
C14
VOUT2
3.3V
C17
220µF
R14 C21
6.5k
C20
R15 0.1µF
10k
4 TONSEL
14 SKIPSEL
13 EN
18 ENC
VREG5 17
PGOOD 23
VREG3 8
C9
4.7µF
C16
4.7µF
R6
100k
5V Always On
PGOOD Indicator
3.3V Always On
DS8223L/M-04 April 2011
www.richtek.com
3
datasheet pdf - http://www.DataSheet4U.net/
Page 3
Part Number RT8223M
Manufactur Richtek
Description (RT8223L/M) Main Power Supply Controller
Total Page 24 Pages
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