®
RT2702
Step-Down DC-DC Controller with Remote Sense
General Description
The RT2702 is a high-efficiency and high-current
synchronous buck controller designed to drive a DrMOS
module. A COT (Constant-On-Time) PWM controller and
PWM signal for DrMOS are integrated so that the external
circuit is easily designed and the component count is
reduced. The RT2702 adopts FCOT control technology
that responds instantly to input voltage change. Besides,
the RT2702 includes a 5V (VDRV) linear regulator, which
can provide 5V voltage and supply up to 100mA for DrMOS.
The RT2702 supports two modes transition function with
various operating states, which include audio skipping
mode (ASM) and forced-CCM mode (FCCM).
Other features include power good indication, external soft-
start setting, soft-off discharge function, precise DCR
sense, enable/disable control, over-voltage protection
(OVP), under-voltage protection (UVP), current Limit,
thermal shutdown into the WQFN-16L 3x3 package.
Features
4.5V to 19V Input Voltage Range
Adjustable Output Range, 0.6V Reference with 1%
Accuracy Over-Temperature Protection
FCOT
TM
(Flexible Constant On Time) Control
Integrated 5V LDO@100mA for DrMOS module
Support Pre-biased Output
Programmable Soft-Start
Soft-Off through V
OUT
Discharge
Programmable Switching Frequency
Programmable Over Current Limit
Power Good Indication
OVP, UVP, UVLO Protection
Applications
High Current Distributed Power Systems
Datacom and Telecom Systems
Industrial Power Supplies
Ordering Information
RT2702
Pin Configuration
(TOP VIEW)
VDRV
PHASE
VIN
TON
16 15 14 13
( )
Pin 1 Orientation
***
(2) : Quadrant 2, Follow EIA-481-D
Package Type
QW : WQFN-16L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
MODE
PWM
DISB
THWN
1
2
3
4
12
GND
17
5
6
7
8
11
10
9
EN
POK
ILIM
SS
***Empty means Pin1 orientation is Quadrant 1
Richtek products are :
�½
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.
WQFN-16L 3x3
�½
Marking Information
8H= : Product Code
8H=YM
DNN
YMDNN : Date Code
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS2702-02 May 2019
CSP
CSN
FB
RGND
Note :
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
