®
RT6215F
2A, 24V, 800kHz, ACOT
TM
Step-Down Converter
General Description
The RT6215F is a high-efficiency, synchronous step-down
DC-DC converter that can deliver up to 2A output current
from a 4.5V to 24V input supply. The RT6215F adopts
Advanced Constant On-Time (ACOT
TM
) control architecture
to provide an ultrafast transient response with few external
components and to operate in nearly constant switching
frequency over line, load, and output voltage ranges.
The RT6215F features cycle-by-cycle current limit
protection against short-circuit outputs, and soft-start
function to prevent inrush current during start-up. It also
includes input under-voltage lockout, output under-voltage
protection, over-current protection, and over-temperature
protection (thermal shutdown) to provide safe and smooth
operation in all operating conditions.
Features
Input Supply Voltage Range : 4.5V to 24V
Output Current : 2A
Ω
Internal 100mΩ Switch and 85mΩ Synchronous
Ω
Rectifier
Advanced Constant On-Time (ACOT
TM
) Control for
Ultrafast Transient Response
Steady Switching Frequency : 800kHz
Optimized for Low-ESR Ceramic Output Capacitors
0.791V
±
1.5% High-Accuracy Feedback Reference
Voltage
Programmable Output Voltage : 0.791V to 6V
Monotonic Start-up for Pre-Biased Outputs
Enable Control
Cycle-by-Cycle Current Limit Protection
Input Under-Voltage Lockout (UVLO)
Output Under-Voltage Protection (UVP) with Hiccup
Mode
Over-Temperature Protection (OTP) (Thermal
Shutdown)
Available in TSOT-23-8 (FC) Package
Ordering Information
RT6215F
Package Type
J8F : TSOT-23-8 (FC)
Lead Plating System
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
Note :
Richtek products are :
�½
Applications
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.
Set Top Box
Portable TV
Access Point Router
DSL Modem
LCD TV
�½
Simplified Application Circuit
RT6215F
V
IN
C
IN
Enable
MODE
EN
MODE
GND
FB
R2
SW
C
FF
R1
R
FF
C
OUT
VIN
BOOT
R3
C
BOOT
L
V
OUT
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6215F-00
September 2018
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
