RT5788A/B
Ordering Information
RT5788A/B
Package Type
J8F : TSOT-23-8 (FC)
Lead Plating System
G : Green (Halogen Free and Pb Free)
PWM Operation Mode
A : Automatic PSM
B : Forced PWM
Note :
Richtek products are :
�½
Pin Configuration
(TOP VIEW)
AGND
6
3
8
7
2
PGOOD
VIN
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.
TSOT-23-8 (FC)
Marking Information
RT5788AGJ8F
20= : Product Code
�½
Applications
20=DNN
DNN : Date Code
WLAN ASIC Power / Storage (SSD and HDD)
Mobile Phones and Handheld Devices
STB, Cable Modem, and xDSL Platforms
General Purpose for POL LV Buck Converter
RT5788BGJ8F
1Z= : Product Code
1Z=DNN
DNN : Date Code
Functional Pin Description
Pin No.
1
Pin Name
PGOOD
Pin Function
Open-drain power-good indication output. The power-good function is activated after
soft-start is finished.
Power input. The input voltage range is from 2.5V to 6V. Connect a suitable input
bypass capacitor (typically of greater than 10F) between this pin and PGND. The
bypass capacitor should be placed as close to the IC as possible.
Switch node between the internal switch and the synchronous rectifier. Connect the
output LC filter from this pin to the output load.
Power ground. This pin, connected to analog ground, must be soldered to a large
PCB copper area for maximum power dissipation.
Output voltage sense input. This pin is used to monitor and adjust output voltage to
enhance load transient regulation.
Analog ground. It provides a ground return path for the control circuitry and internal
reference. Connect AGND to a clean inner GND point with separate trace.
Feedback voltage input. Connect this pin to the midpoint of the external feedback
resistive divider to set the output voltage of the converter to the desired regulation
level. The device regulates the FB voltage at a feedback reference voltage, typically
0.6V.
Enable control input. A logic-high enables the converter; a logic-low forces the device
into shutdown mode.
is a registered trademark of Richtek Technology Corporation.
2
VIN
3
4
5
6
LX
PGND
VOUT
AGND
7
FB
8
EN
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
DS5788A/B-02 March 2018
PGND
LX
VOUT
5
4
EN
FB
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
