RT2875A/B
Ordering Information
RT2875A/B
Label Part Number
(Z0W) : Sbucon = LGS & Exposed Pad-Option 2
(Y0W) : Sbucon = LGS & Exposed Pad-Option 2
(Y1W) : Subcon = GTK & Exposed Pad-Option 3
Package Type
CP : TSSOP-14 (Exposed Pad)
Lead Plating System
G : Green (Halogen Free and Pb Free)
AQ : Latched UVP
BQ : Hiccup Mode UVP
Marking Information
RT2875AQGCP
RT2875AQGCP : Product Number
RT2875AQ
GCPYMDNN
YMDNN : Date Code
RT2875BQGCP
RT2875BQGCP : Product Number
RT2875BQ
GCPYMDNN
YMDNN : Date Code
Note :
Richtek products are :
�½
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.
�½
Functional Pin Description
Pin No.
1, 2
Pin Name
SW
Pin Function
Switch node. Connect to external L-C filter.
Power ground. The exposed pad must be soldered to a large PCB and
connected to PGND for maximum power dissipation.
Oscillator resistor and external frequency synchronization input. Must connect a
resistor from this pin to GND to set the switching frequency. If SYNC clock is
requested, connect an external clock to change the switching frequency.
Analog ground.
Current limit setting. Connect a resistor from this pin to GND to set the current
limit value.
Feedback voltage input. The pin is used to set the output voltage of the
converter to regulate to the desired via a resistive divider. Feedback reference =
0.6V.
Compensation node. COMP is used to compensate the regulation control loop.
Connect a series RC network from COMP to GND. In some cases, an additional
capacitor from COMP to GND is required.
Soft-start time setting. Connect a capacitor from SS to GND to set the soft-start
period.
Enable control input. High = Enable.
Power good indicator output.
Power input. Support 4.5V to 36V input voltage. Must bypass with a suitable
large ceramic capacitor at this pin.
Bootstrap supply for high-side gate driver. Connect a 0.1F ceramic capacitor
between the BOOT and SW pins.
3,
PGND
15 (Exposed Pad)
4
5
6
RT/SYNC
AGND
RLIM
7
FB
8
COMP
9
10
11
12, 13
14
SS
EN
PGOOD
VIN
BOOT
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS2875A/B-08 November 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
