RT7241A
Ordering Information
RT7241A
Package Type
QUF : UQFN-18L 3x4 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
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Pin Configuration
(TOP VIEW)
S5
CS
FB
GND
VDD
18 17 16 15 14
13
S3
BOOT
PHASE
PHASE
PGOOD
VIN
PGND
PGND
1
2
3
11
4
10
5
6
7
8
9
12
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.
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UQFN-18L 3x4 (FC)
Functional Pin Description
Pin No.
1
2
3, 4
5
6
7
8
9
10, 11
12
13
14
15
16
17
18
Pin Name
S3
BOOT
PHASE
VDDQ
VLDOIN
VTT
VTTGND
VTTSNS
PGND
VIN
PGOOD
VDD
GND
FB
CS
S5
Pin Function
VTT LDO enable control input. Do not leave this pin floating.
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 PHASE and
BOOT pins to form a floating supply across the power switch driver.
Switch node. External inductor connection for VDDQ.
Reference input for the VTT LDO. An internal discharging circuit is connected to
this pin.
Power supply for the VTT LDO.
Power output for the VTT LDO.
Power ground for the VTT LDO.
Voltage sense input for the VTT LDO. Connect to the terminal of the VTT LDO
output capacitor.
Power ground for VDDQ.
Supply input for VDDQ.
Open-drain power good indicator output.
Analog supply input.
Analog ground.
Feedback voltage input. Connect to a resistive voltage divider from VDDQ to GND
to adjust the output of PWM converter.
Current limit threshold setting input. Connect to GND through the setting resistor.
PWM converter enable control input. Do not leave this pin floating.
Copyright
©
2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
VDDQ
VLDOIN
VTT
VTTGND
VTTSNS
DS7241A-02 January 2017
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
