RT9832 Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – PWM Duty Generator with Adjustable Duty Setting

®
RT9832
PWM Duty Generator with Adjustable Duty Setting
General Description
The RT9832 is a PWM duty generator with adjustable
duty setting. The PWM frequency is fixed 0.5Hz typically.
The duty cycle can be set by an external resistor between
the RSET and GND pins. When the RSET pin is floating,
the duty cycle is set at 50% typically. An open drain output
is provided and it can be pulled up to a suitable voltage
level with a pull-up resistor.
The device operates over a wide input voltage range from
2.8V to 20V. An active-low enable control pin is used to
reduce shutdown current to 3.5μA. Input UVLO and thermal
shutdown are provided. The RT9832 is available in the
WL-CSP-6B 0.8x1.2 (BSC) package.
Ordering Information
RT9832
Note :
Package Type
WSC : WL-CSP-6B 0.8x1.2 (BSC)
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
0BW
0B : Product Code
W : Date Code
Features
z Input Voltage Range : 2.8V to 20V
z 0.5Hz PWM Frequency
z EN Pin with Internal Pull-Low Resistor
z Open Drain Output
z Adjustable PWM Duty from 1% to 100%
z Input Under Voltage Lockout
z Thermal Shutdown Protection
z Shutdown Current : <3.5μA
z 6-Ball WL-CSP Package
z RoHS Compliant and Halogen Free
Applications
z Cellular Phones
z Digital Cameras
z Probable Instruments
Pin Configurations
(TOP VIEW)
VCC A1 A2 RSET
GND B1 B2 EN
OUT C1 C2 NC
WL-CSP-6B 0.8x1.2 (BSC)
Simplified Application Circuit
3.3V
V_CC
VCC
OUT
C_VIN
RT9832
RSET
Enable
EN
Rpull-up
PWM
R_SET
GND
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS9832-00 January 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1