RT7299B
Marking Information
RT7299BHGQW
Pin Configurations
(TOP VIEW)
07= : Product Code
YMDNN : Date Code
07=YM
DNN
1
14
2
3
4
5
6
13
12
11
10
9
GND
GND
PVIN
PVIN
VIN
BOOT
LX
LX
RT7299BLGQW
GND
06= : Product Code
YMDNN : Date Code
EN
SS/TR
15
8
06=YM
DNN
7
WQFN-14AL 3.5x3.5
Functional Pin Description
Pin No.
Pin Name
Pin Function
Oscillator Resistor and External Frequency Synchronization Input. Connecting a
1
RT/SYNC resistor from this pin to GND sets the switching frequency or connecting an
external clock to this pin changes the switching frequency.
System Ground. Provide the ground return path for the control circuitry and
low-side power MOSFET. The exposed pad must be soldered to a large PCB
and connected to GND for minimum power dissipation.
2, 3,
GND
15 (Exposed Pad)
4, 5
6
PVIN
VIN
Power Input. Supplies the power switches of the device.
Supply Voltage Input. Supplies the control circuitry and internal reference of the
device.
Feedback Voltage Input. This pin is used to set the desired output voltage via an
external resistive divider. The feedback reference voltage is 0.6V typically.
7
8
FB
Compensation Node. The current comparator threshold increases with this
control voltage. Connect external compensation elements to this pin to stabilize
the control loop.
COMP
Soft-Start and Tracking Control Input. Connect a capacitor from SS to GND to
set the soft-start period. The soft-start period can be used to track and sequence
when the external voltage on this pin overrides the internal reference.
9
SS/TR
Enable Control Input. Floating this pin or connecting this pin to logic high can
enable the device and connecting this pin to GND can disable the device.
10
11, 12
13
EN
Switch Node. LX is the switching node that supplies power to the output and
connect the output LC filter from LX to the output load.
LX
Bootstrap Supply for High-Side Gate Driver. Connect a 100nF or greater
capacitor from LX to BOOT to power the high-side switch.
BOOT
Power Good Indicator Output. This pin is an open-drain logic output that is
pulled to ground when the output voltage is lower or higher than its specified
threshold under the conditions of OVP, OTP, dropout, EN shutdown, or during
slow start.
14
PGOOD
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is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS7299B-05 June 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
