RT2825
Pin No.
24
Pin Name
COMP2
Pin Function
Compensation node for CH2. COMP is used to compensate the regulation
control loop. Connect a series RC network from COMP to AGND. In some cases,
an additional capacitor from COMP to AGND is required.
Soft-start time setting for CH2. Connect a capacitor to this pin and AGND for
soft-start time setting.
Switch node of CH2.
Bootstrap supply for high-side gate driver of CH2. Connect a 0.1F ceramic
capacitor from this pin to LX2
Current limit setting for CH2. Connect a resistor from RLIM2 to AGND to set the
peak current limit on the output inductor.
Feedback voltage input for CH2.
Enable control input for CH1. A low level signal on this pin disables it. If this pin is
left open, a weak internal pull-up will allow automatic enables.
Enable control input for CH2. A low level signal on this pin disables it. If this pin is
left open, a weak internal pull-up will allow automatic enables.
Power ground for CH2.
Ground. The exposed pad must be soldered to a large PCB and connected to
PGND for maximum power dissipation.
25
26, 27, 28
29
30
31
32
33
34, 35, 36
SS2
LX2
BOOT2
RLIM2
FB2
EN1
EN2
PGND2
37 (Exposed Pad) PGND
Copyright
©
2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS2825-00 May 2017
www.richtek.com
3
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