http://www.datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




  Richtek Technology Electronic Components Datasheet  

RT8121 Datasheet

Single Phase PWM Controller

No Preview Available !

RT8121 pdf
RT8121
Single Phase PWM Controller with 1-bit VID
General Description
RT8121 is a single phase PWM buck controller with one
integrated MOSFET driver for advanced microprocessor
application as VR12 VCCIO power. This controller
maintains the same features as the multi-phase product
family, but reduces the output to one phase for lower current
systems. Features of this controller include adjustable
operation frequency, power good indication, external error-
amp compensation, over voltage protection, over current
protection, externally adjustable offset voltage, load
transient enhancement (quick response), and enable/
shutdown control to achieve optimal power management
solution for various applications. The RT8121 comes in
the WQFN-20L 3x3 package.
Features
z Single Phase Power Conversion
z One Embedded MOSFET Driver with Internal
Bootstrap Diode
z 1-bit VID Table for VR12 VCCIO
z Continuous Differential Inductor DCR Current Sense
z Adjustable Soft-Start
z Adjustable Frequency Typically at 200kHz
z Power Good Indication
z Adjustable Over Current Protection
z Over Voltage Protection
z Over Temperature Protection
z Small 20-Lead WQFN Package
z RoHS Compliant and Halogen Free
Ordering Information
RT8121
Package Type
QW : WQFN-20L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
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
RT8121GQW
J1= : Product Code
J1=YM
DNN
YMDNN : Date Code
Applications
z VR12 VCCIO Voltage Regulator
z Low Voltage, High Current DC/DC Converter
Pin Configurations
(TOP VIEW)
FBRTN
SS
COMP
FB
ADJ
20 19 18 17 16
1 15 UGATE
2 14 PHASE
3 GND 13 VCC12
4 21 12 LGATE
5 11 OCSET
6 7 8 9 10
WQFN-20L 3x3
RT8121ZQW
J1 YM
DNN
J1 : Product Code
YMDNN : Date Code
DS8121-02 May 2011
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT8121 Datasheet

Single Phase PWM Controller

No Preview Available !

RT8121 pdf
RT8121
Typical Application Circuit
VIN
C11 4.5 to 13.2V
12V
C9
EN
R20 R19
RT8121
5 ADJ
BOOT 16
13 VCC12
19, 20, 21 (Exposed Pad) GND
Q3 RRT
7
RT/EN
UGATE 15
PHASE 14
LGATE 12
ISP 9
R15 R16
11 OCSET
ISN 10
C10 R14
8 VCC5
6 OFS
FB 4
Option for
Positive OFS
Option for
COMP 3
R13 Negative
OFS
FBRTN 1
PGOOD
18 VID
17 PGOOD
SS 2
R1 C1
Q1
R2
Q2
R3
R5
R6
D1
C6 R9
R7
R10
C7 R21 C8
C12 C13
NTC
L
R4
C2
C3
C5
R8
Option
R11
R17
VTT
Function Block Diagram
C14
VOUT
Load
R12
VCC_SNS
VSS_SNS
OFS
FB
RT/EN
VID
FBRTN
SS
PGOOD
Fault Logic VCC12
Offset
Modulation
Waveform
Generator
VR11 VID
Table
VID Off
Soft Start
and Fault
Logic
Transient
Response
Enhancement
Driver
Logic
MOSFET
Driver
-EA
+
C+MP
-
PWM
OV
OT
Thermal
Protection
EAP
+ 150mV
+- OC
/10
-
+
OV
OC
OT
Driver Logic
Current
Sense
POR
Power On
Reset
5V
Regulator
BOOT
UGATE
PHASE
LGATE
GND
COMP
OCSET
ADJ
ISP
ISN
VCC12
VCC5
www.richtek.com
2
DS8121-02 May 2011


Part Number RT8121
Description Single Phase PWM Controller
Maker Richtek
Total Page 16 Pages
PDF Download
RT8121 pdf
RT8121 Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 RT8120 Single-Phase Synchronous Buck PWM Controller Richtek
Richtek
RT8120 pdf
2 RT8121 Single Phase PWM Controller Richtek
Richtek
RT8121 pdf
3 RT8127 High Efficiency Dual-Channel Output Synchronous Buck PWM Controller Richtek
Richtek
RT8127 pdf





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy