RT1720

Copyright © 2014 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS1720-00

November

2014

2

Ordering Information

RT1720

Package Type

F : MSOP-10

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

Richtek products are :



RoHS compliant and compatible with the current

requirements of IPC/JEDEC J-STD-020.



Suitable for

use in

SnPb

or

Pb-free soldering

processes.

Marking Information

01=YM

DNN

01= : Product Code

YMDNN : Date Code

Pin Configurations

(TOP VIEW)

TMR

FLT

FB

SNS

GATE

GND

PGOOD

VCC

SHDN

VOUT

5

6

7

8

4

3

2

10

9

MSOP-10

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

FB

Voltage Regulator Feedback Input. Connect a resistive divider from output to FB to

GND to set the maximum output voltage and voltage regulation set-point.

2

VOUT

Output Voltage Connection. VOUT is the lower reference voltage for the GATE

charge pump.

3

GATE

N-MOSFET Gate Drive Output.

4

SNS

Current Sense Input. Connect a sense resistor from VCC to SNS to monitor the

current through the external N-MOSFET.

5

VCC

Positive Supply Voltage Input.

6

SHDN

̅̅̅̅̅̅̅̅

Shutdown Control Input.

7

FLT

̅̅̅̅̅̅̅

Open-Collector Fault Output.

8

PGOOD

Open-Collector Power Good Indicator.

9

GND

Ground.

10

TMR

Fault Timer Input. Connect a capacitor from TMR to GND to program the maximum

time the part is allowed to remain in voltage regulation or current regulation mode.

TMR capacitor with value greater than 0.47

F is recommended.