RT8525D Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – Current Mode Boost Controller

®
RT8525D
Current Mode Boost Controller
General Description
The RT8525D is a wide input operating voltage range step
up controller. High voltage output and large output current
are feasible by using an external N-MOSFET. The RT8525D
input operating range is from 4.5V to 25V.
The RT8525D is an optimized design for wide output voltage
range applications. The output voltage of the RT8525D can
be adjusted by the FB pin.
Ordering Information
RT8525D
Package Type
QW : WDFN-12L 3x3 (W-Type)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
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.
Marking Information
0F= : Product Code
0F=YM
DNN
YMDNN : Date Code
Features
z VIN Range : 4.5V to 25V
z Programmable Soft-Start Time
z Programmable Boost SW Frequency from 50kHz to
600kHz
z Output Over Voltage Protection
z Output Under Voltage Protection
z 12-Lead WDFN Package
z RoHS Compliant and Halogen Free
Applications
z LCD TV, Monitor Display Backlight
z LEDDriver Application
z High Current High Output Voltage DC/DC Converters
z High Input Voltage DC/DC Converters
Pin Configurations
(TOP VIEW)
VDC 1
VIN 2
COMP ³
SS ⁴
FSW 5
FAULT ⁶
12 _EN
11 _DRV
10 GND
9 ISW
8 OVP
13 _{7 FB}
WDFN-12L 3x3
Simplified Application Circuit
L1
V_IN
C_IN
RT8525D
VIN
DRV
C_VIN
VDC
C_DC
ISW
R_C
C_C2
COMP
GND
D1
M1
R_SLP
R_S
V_OUT
C_OUT
R_FB1
C_C1
R_SW
C_SS
FSW
SS
FB
FAULT
OVP
R_FLT
12V
R_{OVP1 RFB2}
Chip Enable
EN
C_OVP
R_OVP2
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8525D-00 June 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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