OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

RT8209MGQW

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
RT8209L/M
®
DS8209L/M-07 January 2014 www.richtek.com
1
©
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Single Synchronous Buck Controller
Features
zz
zz
z
Ultra High Efficiency
zz
zz
z Resistor Programmable Current Limit by Low Side
R
DS(ON)
Sense (Lossless Limit)
zz
zz
z 4700ppm/
°°
°°
°C Current Sensing
zz
zz
z Quick Load Step Response within 100ns
zz
zz
z 1% V
FB
Accuracy over Line and Load
zz
zz
z 4.5V to 26V Battery Input Range
zz
zz
z Resistor Programmable Frequency
zz
zz
z Integrated Bootstrap Switch
zz
zz
z Integrated Negative Current Limiter
zz
zz
z Over/Under Voltage Protection
zz
zz
z Internal Soft-Start and Soft-Discharge Output
zz
zz
z Power Good Indicator
zz
zz
z RoHS Compliant and Halogen Free
Applications
z Notebook Computers
z System Power Supplies
z I/O Supplies
Pin Configurations
(TOP VIEW)
RT8209L
WQFN-16L 3x3
PGOOD
FB
VOUT
VDD
UGATE
PHASE
VDDP
CS
NC
PGND
GND
LGATE
TON
EN/DEM
BOOT
NC
12
11
10
9
13141516
1
2
3
4
8765
NC
17
RT8209M
WQFN-14L 3.5x3.5
13
12
11
10
141
2
3
4
5
87
FB
VDD
TON
VOUT
UGATE
PHASE
VDDP
CS
GND
PGND
EN/DEM
BOOT
NC
15
96
PGOOD LGATE
General Description
The RT8209L/M PWM controller provides high efficiency,
excellent transient response, and high DC output accuracy
needed for stepping down high voltage batteries to
generate low voltage CPU core, I/O, and chipset RAM
supplies in notebook computers.
The constant-on-time PWM control scheme handles wide
input/output voltage ratios with ease and provides 100ns
“instant-on” response to load transients while maintaining
a relatively constant switching frequency.
The RT8209L/M achieves high efficiency at a reduced cost
by eliminating the current sense resistor found in
traditional current mode PWMs. Efficiency is further
enhanced by its ability to drive very large synchronous
rectifier MOSFETs. The buck conversion allows this device
to directly step down high voltage batteries for low voltage
supplies as low as 0.75V. The RT8209L is in a WQFN-
16L 3x3 package, the RT8209M is in a WQFN-14L 3.5x3.5
package.
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.
RT8209
Package Type
QW : WQFN-16L 3x3 (W-Type)
QW : WQFN-14L 3.5x3.5 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
L : WQFN-16L 3x3
M : WQFN-14L 3.5x3.5
RT8209L/M
2
DS8209L/M-07 January 2014www.richtek.com
©
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Functional Pin Description
Pin No.
RT8209L RT8209M
Pin Name Pin Function
1 3 VOUT
Output Voltage Pin. Connect to the output of PWM converter.
VOUT is an input of the PWM controller.
2 4 VDD
Supply Input Pin. Analog supply for entire IC. Bypass to GND
with a 1μF ceramic capacitor.
3 5 FB
Feedback Input Pin. Connect FB to a resistive voltage divider
from VOUT to GND to adjust VOUT from 0.75V to 3.3V.
4 6 PGOOD
Power Good Indicator it is an Open Drain Output of PWM
Converter. This pin will be pulled high when the output voltage
is within the target range.
5, 14,
17 (Exposed pad)
15 (Exposed pad) NC
No Internal Connection. The exposed pad must be soldered to
a large PCB for maximum power dissipation.
Marking Information
JX=YM
DNN
JX= : Product Code
YMDNN : Date Code
RT8209LGQW
A8= : Product Code
YMDNN : Date Code
RT8209MGQW
Typical Application Circuit
V
D
D
P
C
S
U
G
A
T
E
F
B
R
T
8
2
0
9
L
/
M
L
G
A
T
E
B
O
O
T
P
H
A
S
E
V
O
U
T
V
I
N
V
D
D
P
G
O
O
D
P
G
O
O
D
G
N
D
T
O
N
V
D
D
P
R
2
R
1
C
2
R
T
O
N
Q
1
Q
2
C
1
V
O
U
T
=
1
.
0
5
V
EN/DEM
R
6
P
G
N
D
C
C
M
/
D
E
M
2
5
0
k
1
0
1
0
0
k
1
µ
F
1
8
k
0
R
4
R
5
C
3
0
0
.
1
µ
F
4
.
5
V
t
o
2
6
V
B
S
C
1
1
9
N
0
3
S
C
4
1
0
µ
F
R
7
*
C
7
*
R
8
R
9
L
1
1
µ
H
C
5
*
C
6
*
2
2
0
µ
F
B
S
C
1
1
9
N
0
3
S
1
2
k
3
0
k
*
:
O
p
t
i
o
n
a
l
JX : Product Code
YMDNN : Date Code
RT8209LZQW
JX YM
DNN
A8=YM
DNN
A5 : Product Code
YMDNN : Date Code
RT8209MZQW
A5 YM
DNN
RT8209L/M
3
DS8209L/M-07 January 2014 www.richtek.com
©
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Function Block Diagram
Pin No. Pin Name Pin Function
6 7 GND Analog Ground.
7 8 PGND Power Ground.
8 9 LGATE
Low Side N-MOSFET Gate Driver Output for PWM. This pin swings between
GND and VDDP.
9 10 VDDP
Gate Driver Supply for External MOSFETs. Bypass to GND with a 1μF ceramic
capacitor.
10 11 CS
Over Current Trip Point Set Input. Connect resistor from this pin to signal ground
to set threshold for both over current and negative over current limit.
11 12 PHASE
UGATE High Side Gate Driver Return. Also serves as anode of over current
comparator.
12 13 UGATE
High Side N-MOSFET Floating Gate Driver Output for PWM Converter. This pin
swings between PHASE and BOOT.
13 14 BOOT
Bootstrap Capacitor Connection for PWM Converter. Connect to an external
ceramic capacitor to PHASE.
15 1 EN/DEM
Enable/Diode Emulation Mode Control Input. Connect to VDD for diode
emulation mode, connect to GND for shutdown and float the pin for CCM mode.
16 2 TON
On Time/Frequency Adjustment Pin. Connect to PHASE through a resistor.
TON is an input for the PWM controller.
Min. T
OFF
QTRIG
1-SHOT
+
-
+
-
GM
+
-
V
REF
S1 Q
Latch
S1 Q
Latch
+
-
OV
+
-
UV
125% V
REF
70% V
REF
+
-
90% V
REF
SS Ramp
Thermal
Shutdown
Diode
Emulation
DRV
DRV
On-time
Compute
1-SHOT
CS
FB
VOUT
VDD
UGATE
PHASE
VDDP
PGOOD
PGND
LGATE
TON
BOOT
TRIG
EN/DEM
R
QS
SS
(internal)
GND
-
+
GM
10µA
+
-
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

RT8209MGQW

Mfr. #:
Buy RT8209MGQW
Manufacturer:
Description:
IC REG CTRLR BUCK 14WQFN
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet