RT6217A/B
Ordering Information
RT6217A/B
Package Type
J8F : TSOT-23-8 (FC)
Lead Plating System
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
PGOOD
Pin Configuration
(TOP VIEW)
BOOT
5
4
8
7
2
VIN
EN
6
3
SS
FB
PSM/PWM
A : PSM/PWM
B : Forced PWM
Note :
Richtek products are :
�½
TSOT-23-8 (FC)
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.
Marking Information
RT6217AHGJ8F
0U= : Product Code
�½
0U=DNN
DNN : Date Code
Applications
Set Top Box
Portable TV
Access Point Router
DSL Modem
LCD TV
RT6217BHGJ8F
0T= : Product Code
0T=DNN
DNN : Date Code
Functional Pin Description
Pin No.
1
2
3
4
5
6
7
Pin Name
PGOOD
VIN
SW
GND
BOOT
EN
SS
Pin Function
Open-drain power-good indication output. Once being started-up, PGOOD will be pulled
low to GND if any internal protection is triggered except current limit protection.
Power input. The input voltage range is from 4.5V to 24V. Connect a suitable input
capacitor between this pin and GND, usually two 10F or larger ceramic capacitors with a
typical capacitance 22F.
Switch node between the internal switch and the synchronous rectifier. Connect this pin to
the inductor and bootstrap capacitor.
Power ground.
Bootstrap capacitor connection node to supply the high-side gate driver. Connect a 0.1F
ceramic capacitor between this pin and SW pin.
Enable control input. A logic-high enables the converter; a logic-low forces the device into
shutdown mode.
Soft-start capacitor connection node. Connect an external capacitor between this pin and
ground to set the soft-start time. Do not leave this pin unconnected. A capacitor of 2.8nF to
100nF is suggested.
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 Feedback Threshold Voltage, typically 0.791V.
is a registered trademark of Richtek Technology Corporation.
8
FB
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
DS6217A/B-01 October 2018
GND
SW
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
