RT8097A
6V, 2A, 1MHz, CMCOT Synchronous Step-Down Converter
General Description
Features
Efficiency Up to 95%
The RT8097A is a simple, easy-to-use, 2A synchronous
step-down DC-DC converter with an input supply voltage
range of 2.7V to 6V. The device build-in an accurate 0.6V
(typ.) reference voltage and integrates low RDS(ON) power
MOSFETs to achieve high efficiency in a SOT-23-5 and
SOT-23-6 packages.
2A Converter With Built-In 100m/70m Low
RDS(ON) Power FETs
Input Supply Voltage Range : 2.7V to 6V
Output Voltage Range : 0.6V to 3.4V
Current Mode Constant On-Time (CMCOT)
Control
The RT8097A adopts Current Mode Constant On-Time
(CMCOT) control architecture to provide an ultrafast
transient response with few external components and to
operate in nearly constant switching frequency over the
line, load, and output voltage range. The RT8097A
operates in automatic PSM that maintains high efficiency
during light load operation.
Ultrafast Transient Response
No Needs For External Compensations
Optimized for Low-ESR Ceramic Output
Capacitors
0.6V 1.5% High-Accuracy Feedback Reference
Voltage
The RT8097A senses low-side FETs current for a robust
over-current protection. It features cycle-by-cycle current
limit protection and prevent the device from the
catastrophic damage in output short circuit, over current or
inductor saturation. An internally adjustable soft-start
function prevents inrush current during start-up. The
device also includes input under-voltage lockout, output
under-voltage protection, and over-temperature protection
(thermal shutdown) to provide safe and smooth operation
in all operating conditions. The RT8097A is offered in a
SOT-23-5 and SOT-23-6 packages.
LS FETs Protection for Robust Over-Current
Protection
Power Saving in Light Load
Fixed Switching Frequency : 1MHz (typ.)
Internally Soft-Start Function
Monotonic Start-Up for Pre-Biased Output
Input Under-Voltage Lockout (UVLO)
Output Under-Voltage Protection (UVP) with
Hiccup Mode
Power Good Indication in SOT-23-6 Package
Enable Control
Available In SOT-23-5 and SOT-23-6 Packages
Applications
STB, Cable Modem, & xDSL Platforms
LCD TV Power Supply & Metering Platforms
General Purpose Point of Load (POL)
Simplified Application Circuit
L
RT8097A
V
LX
IN
V
VIN
OUT
C
IN
C
R1
R2
OUT
EN
PG*
FB
GND
*For SOT-23-6 Package Only
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation
DS8097A-09 December 2018
www.richtek.com
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