RT8130C Datasheet, PDF (1/18 Pages) Richtek Technology Corporation – Power Good Indicator

®
RT8130C
12V Green Voltage Mode High Efficiency Synchronous
Buck PWM Controller
General Description
The RT8130C is a high efficiency single phase
synchronous Buck DC/DC controller with 5V/12V supply
voltage. The IC features Green Voltage Mode (GVM^TM)
control, which is specifically designed to improve converter
efficiency at light load condition. At light load condition,
the IC automatically operates in the diode emulation mode
with constant on-time PFM to reduce switching frequency
so as to improve conversion efficiency. As the load current
increases, the RT8130C leaves the Diode Emulation Mode
(DEM) and operates in the continuous conduction mode
with fixed frequency PWM.
The RT8130C has embedded MOSFET gate driver with
high driving capability, supporting driving voltage up to 12V
for high output current application. This device uses
lossless low-side MOSFET R_DS(ON) current sense
technique for over-current protection with adjustable
threshold set by the LGATE pin (LGOCS). Other features
include power good indication, enable/disable control and
internal soft-start. The RT8130C also provides fault
protection functions to protect the power stage output.
With above functions, the IC provides customers a cost-
effective solution for high efficiency power conversion. The
RT8130C is available in the WDFN-10L 3x3 package.
Features
 Green Voltage Mode (GVM^TM) Control
 High Light Load Efficiency
 Single 5V to 12V Driver Voltage
 Integrated High Driving Capability N-MOSFET Gate
Drivers
 300kHz Fixed Frequency Internal Oscillator
 88% Maximum PWM Duty Cycle
 Power Good Indicator
 Enable/Disable Control
 Adaptive Zero-Current Detection
 Internal Soft-Start
 Lossless Low-Side MOSFET R_DS(ON) Current Sensing
for Over-Current Fault Monitoring
 LGATE Over-Current Setting (LGOCS)
 OCP, UVP, OVP, OTP, UVLO
Applications
 Motherboard, Memory/Chip-set Power
 Graphic Card, GPU/Memory Core Power
 Low Voltage, High Current DC/DC Regulator
Simplified Application Circuit
V_IN
V_CC
V_PGOOD
EN
RT8130C
VCC
BOOT
UGATE
PGOOD
COMP/EN
PHASE
LGATE
GND
FB
V_OUT
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8130C-00 April 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1