RT7291A/B
Ordering Information
RT7291A/B
Package Type
QUF : UQFN-16L 3x3 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Output Voltage
A : 5V
B : 5.1V
VIN
PGND
Pin Configuration
(TOP VIEW)
AGND
EN
ENLDO
VCC
BOOT
14 13 12 11 10
1
15
2
9
SW
SW
SW
16
Note :
�½
SW
3
4
5
6
7
8
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
�½
Suitable for use in SnPb or Pb-free soldering processes.
UQFN-16L 3x3 (FC)
Marking Information
RT7291AGQUF
39= : Product Code
RT7291BGQUF
4M= : Product Code
YMDNN : Date Code
39=YM
DNN
4M=YM
DNN
YMDNN : Date Code
Functional Pin Description
Pin No.
1
2
3
4
5
6
7
8, 9, 15, 16
10
Pin Name
VIN
PGND
VBYP
PGOOD
CLK
LDO
VOUT
SW
BOOT
Pin Function
Power input connect to high-side MOSFET drain.
Power ground.
Switch over source voltage for VCC. A low pass filter should be connected to
AGND, if VBYP is applied. If VBYP is not used, then connect to AGND
.
Do not
connect to VCC pin.
Open-drain power good indicator output.
300kHz clock output to drive the external charge pump.
5V linear regulator output. Decouple with a minimum 4.7F ceramic capacitor.
Output voltage sense input. An internal discharging circuit is connected to this pin.
Switch node.
Bootstrap supply for high-side gate driver. A capacitor is needed to drive the power
switch's gate above the supply voltage. It is connected between the SW and
BOOT pins to form a floating supply across the power switch driver.
5V linear regulator output for internal control circuit. A capacitor (typical 2.2F)
should be connected to AGND. V
CC
can only supply internal circuits. Do not
connect to external loads.
Enable control input for linear regulator. This pin is internally pulled up to high by
10A.
Enable control input. Do not leave this pin floating.
Analog ground.
is a registered trademark of Richtek Technology Corporation.
11
VCC
12
13
14
ENLDO
EN
AGND
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
VBYP
PGOOD
CLK
LDO
VOUT
DS7291A/B-03 January 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
