®
RT8130A
12V Green Voltage Mode High Efficiency Synchronous
Buck PWM Controller
General Description
Features
Green Voltage Mode (GVMTM) Control
The RT8130A is a high efficiency single phase
High Light Load Efficiency
synchronous Buck DC/DC controller with 5V/12V supply
voltage. The IC features Green Voltage Mode (GVMTM
)
Single 5V to 12V Driver Voltage
Integrated High Driving Capability N-MOSFET Gate
Drivers
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 RT8130Aleaves theDiode Emulation Mode
(DEM) and operates in the continuous conduction mode
with fixed frequency PWM.
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 RDS(ON) Current Sensing
for Over-Current Fault Monitoring
LGATE Over-Current Setting (LGOCS)
OCP, UVP, OVP, OTP, UVLO
The RT8130A 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 RDS(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 RT8130A 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
RT8130A is available in the WDFN-10L 3x3 package.
Applications
Motherboard, Memory/Chip-set Power
Graphic Card,GPU/Memory Core Power
Low Voltage, High CurrentDC/DC Regulator
Simplified Application Circuit
V
IN
RT8130A
BOOT
V
OUT
VCC
V
CC
UGATE
PHASE
LGATE
V
PGOOD
PGOOD
COMP/EN
EN
FB
GND
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS8130A-01 January 2016
www.richtek.com
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