RT6248B
Ordering Information
RT6248B
Package Type
QUF : UQFN-12HL 3x3 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
PWM Operation Mode
B : Forced-PWM
Note :
Richtek products are :
�½
Marking Information
MB= : Product Code
MB=YM
DNN
YMDNN : Date Code
Pin Configuration
(TOP VIEW)
AGND
PGOOD
8
7
6
5
ILMT
12 11 10
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.
BOOT
LX
LX
VCC
9
BYP
FB
1
2
EN
VIN
PGND
�½
4
3
UQFN-12HL 3x3
Functional Pin Description
Pin No.
1
2, 3
4
5
6
7
8
9
10
Pin Name
BOOT
LX
PGND
VIN
EN
PGOOD
AGND
VCC
FB
Pin Function
Boot-strap pin. Supply high-side gate driver. Decouple this pin to LX pin with
0.1F ceramic cap.
Inductor pin. Connect this pin to the switching node of inductor.
Power ground.
Input pin. Decouple this pin to GND pin with at least 10F ceramic cap.
Enable control. Pull this pin high to turn on the Buck. Do not leave this pin
floating.
Power good indicator. Open drain output when the output voltage is within 90%
to 120% of regulation point.
Analog ground. Connect AGND to a clean inner GND point with separate trace.
5V linear regulator output for internal control circuit. A capacitor (typical 1F)
should be connected to PGND. Don’t connect to external Load.
Output feedback pin. Connect this pin to the center point of the output resistor
divider to program the output voltage.
Bypass input for the internal LDO. BYP is externally connected to the output of
switching regulator. When the BYP voltage rises above the bypass switch turn-on
threshold, the LDO regulator shuts down and the VCC pin is connected to the
BYP pin through an internal switch. But when BYP pin is not used, it should be
connected to ground.
Current limit setting pin. The current limit is set to 8A, 10A or 12A when this pin is
pull low, floating or pull high respectively.
11
BYP
12
ILMT
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS6248B-01 May 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
