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RT6203B Datasheet(PDF) 1 Page - Richtek Technology Corporation

Part No. RT6203B
Description  5A, 18V, 700kHz ACOTTM Synchronous Step-Down Converter with VID Control
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Maker  RICHTEK [Richtek Technology Corporation]
Homepage  http://www.richtek.com
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®
DS6203B-01 July 2017
www.richtek.com
1
©
Copyright 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
RT6203B
5A, 18V, 700kHz ACOTTM Synchronous Step-Down
Converter with VID Control
General Description
The RT6203B is an adaptive on-time mode synchronous
Buck converter. The main control loop of the RT6203B
uses an adaptive on-time mode control which provides a
very fast transient response with no external components.
The RT6203B operates from 4.5V to 18V VIN input. After
the initial power-up, the output voltage can be changed by
codes sent into the IC via an I2C compatible VID control
bus. There are special codes which can be used to program
current limit level and thermal shutdown level. Shutdown
and startup can be also programmed by special codes.
The device also features an adjustable soft-start time.
Output voltage is adjustable by resistor divider through
the FB pin between 0.8V to 8V.
Features
VID Control Range Via I
2C Compatitable Interface :
0.72V to 1.48V in 10mV Steps
Adjustable Current Limit
Adjustable Thermal Shutdown
Fast Transient Response
Adjustable Output Voltage from 0.8V to 8V
Steady 700kHz Switching Frequency
Optimized for All Ceramic Capacitors
Externally-Adjustable, Pre-Biased Compatible Soft-
Start
Input Under-Voltage Lockout
Output Over- and Under-Voltage Protection
Power Good Output
Thermal Shutdown
RoHS Compliant and Halogen Free
Applications
Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Simplified Application Circuit
Pin Configuration
(TOP VIEW)
WQFN-20L 4x4
PVCC
PGOOD
A0
A1
SW
SW
PGND
SW
SCL
PGND
1
2
3
4
6
789
15
14
13
12
17
20
18
19
21
PGND
5
11
10
16
PGOOD
RT6203B
FB
VIN
BOOT
SW
SS
CSS
VOUT
VIN
EN
PGND
Enable
Power Good
VCC
PVCC
SCL
SDA
AGND
A0
A1
VS
CFF
C5
R1
R2
C4
C1
R3
C3
L1
Address
Selection
I
2C Control




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