2

RT2660

www.richtek.com

DS2660-00

September 2015

©

Copyright 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Functional Pin Description

Pin No.

Pin Name

Pin Function

1, 2, 3,

21 (Exposed Pad)

PGND

Power Ground. Provide the ground return path for the low-side power MOSFET

and positive input of an internal amplifier for current sensing circuit. The

exposed pad must be soldered to a large PCB and connected to PGND for

minimum power dissipation.

4, 5

VIN

Power Input. Supplies the power switches of the device.

6

GND

Signal Ground. Provides the return path for control circuitry and internal

reference.

7

VREF

Reference Output. A specified 2V reference output is supplied by internal linear

regulator. Decouple with a 0.22

F capacitor between this pin and GND.

8

COMP

Compensation Node. The current comparator threshold increases with this

control voltage. Connect external compensation elements between this pin and

VREF pin to stabilize the control loop.

9

REFIN

Reference Input. The output voltage is targeted by reference input, which is

applied from 0.6V to 2V.

10

VOUT

Output Voltage Monitor Node. A negative input of the gm error amplifier and it

is allowed to be a discharge path if any protection is triggered.

11 to 15

SW

Switch Node. SW is the switching node that supplies power to the output and

connect the output LC filter from SW to the output load.

16

BOOT

Bootstrap Supply for High-Side Gate Driver. Connect a 100nF or greater

capacitor from SW to BOOT to power the high-side switch.

Pin Configurations

VQFN-20L 3.5x4

(TOP VIEW)

PGND

PGND

PGND

VIN

VIN

SW

SW

SW

SW

SW

PGND

21

16

20

17

18

19

10

9

8

7

6

11

12

13

14

15

1

2

5

4

3

Ordering Information

Note :

Richtek products are :



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

04= : Product Code

YMDNN : Date Code

RT2660LGQV

05= : Product Code

YMDNN : Date Code

RT2660HGQV

RT2660

Package Type

QV : VQFN-20L 3.5x4 (V-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free)

L : Latched OVP and UVP

H : OVP Non-latch, UVP Hiccup

05=YM

DNN

04=YM

DNN