RT2613A
Pin Configurations
(TOP VIEW)
VIN
EN
PGOOD
BOOT
16 15 14 13
VIN
VIN
GND
GND
1
2
3
4
5
6
7
8
12
GND
17
11
10
9
SW
SW
SW
SS/TR
WQFN-16L 3x3
Functional Pin Description
Pin No.
1, 2, 16
3, 4,
17 (Exposed Pad)
5
6
7
8
9
10 to 12
13
14
15
Pin Name
VIN
GND
AGND
FB
COMP
RT/SYNC
SS/TR
SW
BOOT
PGOOD
EN
Pin Function
Power Input.
Power Ground. The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
Analog Ground.
Feedback Input.
Compensation Node for Converter Stability.
Frequency Setting and External Synchronous. Clock input.
Soft-Start and Tracking.
Switch Node. Connect this pin to external L-C filter.
Bootstrap Supply for High Side Gate Driver. Connect a capacitor between the
BOOT and SW pin.
Output of Power Good Indicator.
Chip Enable. Externally pulled high to enable and pulled low to disable this
chip. It is internally pulled up to high when the pin is floating.
Function Block Diagram
VIN
Internal pull up
current
Over Temperature
Protection
UVLO
Current
Sense
Enable Comparator
EN
EN Threshold
RT/SYNC
Oscillator
Slope
Compensation
PWM
Comparator
SS/TR
Soft-Start
V
REF
Error
Amplifier
FB
PGOOD Threshold
PGOOD Comparator
PGOOD
Control
Logic
Shutdown
Control
AGND
FB
COMP
RT/SYNC
BOOT
Driver
SW
GND
COMP AGND
GND
Copyright
©
2015 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS2613A-01 July 2015
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
