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RT8223P Datasheet(PDF) 1 Page - Richtek Technology Corporation

Part No. RT8223P
Description  High Efficiency, Main Power Supply Controller for Notebook Computer
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Maker  RICHTEK [Richtek Technology Corporation]
Homepage  http://www.richtek.com
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 1 page
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RT8223P
1
DS8223P-01
June 2011
www.richtek.com
Ordering Information
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.
High Efficiency, Main Power Supply Controller
for Notebook Computer
General Description
The RT8223P 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 RT8223P 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
RT8223P is available in a WQFN-24L 4x4 package.
Features
Constant On-time Control with 100ns Load Step
Response
Wide Input Voltage Range : 6V to 25V
Dual Adjustable Outputs from 2V to 5.5V
Fixed 3.3V and 5V LDO Output : 100mA
2V Reference Voltage
Frequency Selectable via TONSEL Setting
4700ppm/
°°°°°C RDS(ON) Current Sensing
Programmable Current Limit Combined with
Enable Control
Selectable PWM, DEM, or Ultrasonic Mode
Internal Soft-Start and Soft-Discharge
High Efficiency up to 97%
5mW Quiescent Power Dissipation
Thermal Shutdown
RoHS Compliant and Halogen Free
Applications
Notebook and Sub-Notebook Computers
3-Cell and 4-Cell Li+ Battery-Powered Devices
Marking Information
20 : Product Code
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
WQFN-24L 4x4
ENTRIP1
FB1
REF
TONSEL
FB2
ENTRIP2
ENC
VREG5
GND
SKIPSEL
EN
VIN
GND
1
2
3
4
5
6
78
9 10
12
11
18
17
16
15
14
13
21 20 19
24
22
23
25
20 YM
DNN
Package Type
QW : WQFN-24L 4x4 (W-Type)
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
RT8223P




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