RT6215F Step-Down Converter Datasheet

RT6215F Datasheet, PDF, Equivalent


Part Number

RT6215F

Description

Step-Down Converter

Manufacture

Richtek

Total Page 18 Pages
Datasheet
Download RT6215F Datasheet


RT6215F
®
RT6215F
2A, 24V, 800kHz, ACOTTM 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 (ACOTTM) 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.
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 :
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.
Features
Input Supply Voltage Range : 4.5V to 24V
Output Current : 2A
Internal 100mΩ Switch and 85mΩ Synchronous
Rectifier
Advanced Constant On-Time (ACOTTM) 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
Applications
Set Top Box
Portable TV
Access Point Router
DSL Modem
LCD TV
Simplified Application Circuit
VIN
CIN
RT6215F
VIN BOOT
R3
Enable
MODE
EN
MODE
SW
GND
FB
CBOOT
L
R1
CFF
RFF
R2
COUT
VOUT
Copyright ©2018 Richtek Technology Corporation. All rights reserved.
DS6215F-00 September 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT6215F
RT6215F
Pin Configuration
(TOP VIEW)
87 6 5
2 34
Marking Information
1K= : Product Code
1K=DNN
DNN : Date Code
TSOT-23-8 (FC)
Functional Pin Description
Pin No.
Pin Name
Pin Function
1 MODE
Mode selection input. The RT6215F is forced into CCM by setting MODE pin
high. Connect MODE to VIN with a 100kresistor for CCM applications.
Connecting the MODE pin to ground will enable power saving mode (PSM) at
light load. Do not leave this pin unconnected.
2 VIN
Power input. The input voltage range is from 4.5V to 24V. Connect a suitable
input capacitor between this pin and GND.
3 SW
Switch node between the internal switch and the synchronous rectifier. Connect
this pin to the inductor and bootstrap capacitor.
4 GND
Power ground.
5 BOOT
Bootstrap capacitor connection node to supply the high-side gate driver. Connect
a 0.1F ceramic capacitor between this pin and SW pin.
6 EN
Enable control input. A logic-high enables the converter; a logic-low forces the
device into shutdown mode.
7 NC
8 FB
This pin is left to float.
Feedback voltage input. Connect this pin to the midpoint of the external feedback
resistive divider to set the output voltage of the converter to the desired regulation
level. The device regulates the FB voltage at Feedback Threshold Voltage,
typically 0.791V.
Copyright ©2018 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS6215F-00 September 2018


Features ® RT6215F 2A, 24V, 800kHz, ACOTTM Step -Down Converter General Description Th e RT6215F is a high-efficiency, synchro nous 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 (ACOTT M) control architecture to provide an u ltrafast transient response with few ex ternal components and to operate in nea rly constant switching frequency over l ine, load, and output voltage ranges. T he RT6215F features cycle-by-cycle curr ent limit protection against short-circ uit outputs, and soft-start function to prevent inrush current during start-up . It also includes input under-voltage lockout, output under-voltage protectio n, over-current protection, and over-te mperature protection (thermal shutdown) to provide safe and smooth operation i n all operating conditions. Ordering In formation RT6215F Package Type J8F : TS OT-23-8 (FC) Lead Plating System G : Gr een (Halogen Free and Pb Free) UVP Option H : Hiccup Note : Rich.
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