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RT8207LGQW

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27
RT8207L/M
®
DS8207L/M-08 September 2016 www.richtek.com
1
©
Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Complete DDRII/DDRIII/Low-Power DDRIII/DDRIV Memory
Power Supply Controller
General Description
The RT8207L/M provides a complete power supply for both
DDRII/DDRIII/Low-Power DDRIII/DDRIV memory systems.
It integrates a synchronous PWM buck controller with a
1.5A sink/source tracking linear regulator and buffered low
noise reference.
The PWM controller provides the high efficiency, excellent
transient response, and high DC output accuracy needed
for stepping down high voltage batteries to generate low
voltage 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 RT8207L/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 the highest
possible efficiency.
The 1.5A sink/source LDO maintains fast transient
response, only requiring 20μF of ceramic output
capacitance. In addition, the LDO supply input is available
externally to significantly reduce the total power losses.
The RT8207L/M supports all of the sleep state controls
placing VTT at high-Z in S3 and discharging VDDQ, VTT
and VTTREF (soft-off) in S4/S5.
The RT8207L/M has all of the protection features including
thermal shutdown and is available in WQFN-24L 4x4 and
WQFN-20L 3x3 packages.
Features
PWM Controller
Resistor Programmable Current Limit by Low Side
R
DS(ON)
Sense
Quick Load Step Response Within 100ns
1% V
VDDQ
Accuracy Over Line and Load
Fixed 1.8V (DDRII), 1.5V (DDRIII) or Adjustable
0.75V to 3.3V Output Range for 1.35V (Low-Power
DDRIII) and 1.2V (DDRIV)
4.5V to 26V Battery Input Range
Resistor Programmable Frequency
Over/Under Voltage Protection
Internal Current Limit Ramp Soft-Start
Drives Large Synchronous-Rectifier FETs
Power Good Indicator
1.5A LDO (VTT), Buffered Reference (VTTREF)
Capable to Sink and Source 1.5A
External Input Available to Minimize Power Losses
Integrated Divider Tracks 1/2 VDDQ for Both VTT
and VTTREF
Buffered Low Noise 10mA VTTREF Output
Remote Sensing (VTTSNS)
±±
±±
±20mV Accuracy for Both VTTREF and VTT
Supports High-Z in S3 and Soft-Off in S4/S5
RoHS Compliant and Halogen Free
Applications
DDRI/II/III/Low-Power DDRIII/DDRIV Memory Power
Supplies
Notebook Computers
SSTL18, SSTL15 and HSTL Bus Termination
2
DS8207L/M-08 September 2016www.richtek.com
RT8207L/M
©
Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Pin Configuration
(TOP VIEW)
WQFN-24L 4x4 WQFN-20L 3x3
VTTGND
VTTSNS
GND
MODE
VTTREF
NC
TON
NC
VDDQ
FB
S5
S3
PGND
NC
VDDP
VDD
PGOOD
CS
UGATE
LGATE
VTT
VLDOIN
BOOT
PHASE
GND
1
2
3
4
5
6
78910 1211
18
17
16
15
14
13
21 20 1924 2223
25
VTTREF
GND
VTTGND
VTTSNS
LGATE
PGND
VDDP
CS
FB
S3
TON
VTT
VLDOIN
UGATE
BOOT
15
14
13
12
17181920
1
2
3
4
9876
GND
21
115
PHASE
16
VDDQ VDD
PGOOD
10
S5
J7= : Product Code
YMDNN : Date Code
RT8207MGQW
J7=YM
DNN
J7 : Product Code
YMDNN : Date Code
RT8207MZQW
J7 YM
DNN
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.
RT8207L/M
Package Type
QW : WQFN-24L 4x4 (W-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)
L : WQFN-24L 4x4
M : WQFN-20L 3x3
(2)
Pin 1 Orientation
(2) : Quadrant 2, Follow EIA-481-D
Marking Information
EF= : Product Code
YMDNN : Date Code
RT8207LGQW
EF=YM
DNN
EF : Product Code
YMDNN : Date Code
RT8207LZQW / RT8207LZQW(2)
EF YM
DNN
3
DS8207L/M-08 September 2016 www.richtek.com
RT8207L/M
©
Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Figure 2. Fixed Voltage Regulator for RT8207L
Typical Application Circuit
Figure 1. Adjustable Voltage Regulator for RT8207L
1
0
2
1
2
0
1
9
9
V
D
D
P
S
3
U
G
A
T
E
F
B
R
T
8
2
0
7
L
L
G
A
T
E
1
5
2
2
B
O
O
T
P
H
A
S
E
V
D
D
Q
8
L
1
V
I
N
V
D
D
1
4
P
G
O
O
D
1
3
P
G
O
O
D
G
N
D
3
,
2
5
(
E
x
p
o
s
e
d
P
a
d
)
T
O
N
1
2
V
V
D
D
P
5
V
C
1
1
µ
F
R
2
1
0
0
k
R
1
5
.
1
C
2
1
µ
F
V
T
T
/
V
T
T
R
E
F
C
o
n
t
r
o
l
4
.
5
V
t
o
2
6
V
6
2
0
k
R
5
0
R
6
0
C
4
0
.
1
µ
F
C
9
1
0
µ
F
x
3
Q
1
B
S
C
0
9
4
N
0
3
S
Q
2
B
S
C
0
3
2
N
0
3
S
1
µ
H
R
7
*
C
5
*
R
8
6
k
C
7
2
2
0
µ
F
V
V
D
D
Q
1
.
2
V
S5
1
1
V
D
D
Q
C
o
n
t
r
o
l
MODE
D
i
s
c
h
a
r
g
e
M
o
d
e
R
9
1
0
k
4
C
6
*
V
L
D
O
I
N
2
3
C
S
1
6
R
3
5
.
6
k
V
T
T
2
4
V
T
T
S
N
S
2
C
8
1
0
µ
F
x
2
V
T
T
R
E
F
5
C
3
3
3
n
F
PGND
1
8
VTTGND
1
C
9
0
.
1
µ
F
R
T
O
N
*
:
O
p
t
i
o
n
a
l
V
T
T
0
.
6
V
1
0
2
1
2
0
1
9
9
V
D
D
P
S
3
U
G
A
T
E
F
B
R
T
8
2
0
7
L
L
G
A
T
E
1
5
2
2
B
O
O
T
P
H
A
S
E
V
D
D
Q
8
L
1
V
I
N
V
D
D
1
4
P
G
O
O
D
1
3
P
G
O
O
D
G
N
D
3
,
2
5
(
E
x
p
o
s
e
d
P
a
d
)
T
O
N
1
2
C
1
1
µ
F
R
2
1
0
0
k
R
1
5
.
1
C
2
1
µ
F
V
T
T
/
V
T
T
R
E
F
C
o
n
t
r
o
l
4
.
5
V
t
o
2
6
V
6
2
0
k
R
5
0
R
6
0
C
4
0
.
1
µ
F
C
8
1
0
µ
F
x
2
Q
1
B
S
C
0
9
4
N
0
3
S
Q
2
B
S
C
0
3
2
N
0
3
S
1
µ
H
R
7
*
C
5
*
C
6
2
2
0
µ
F
V
V
D
D
Q
1
.
8
V
/
1
.
5
V
S5
1
1
V
D
D
Q
C
o
n
t
r
o
l
MODE
D
i
s
c
h
a
r
g
e
M
o
d
e
4
V
L
D
O
I
N
2
3
C
S
1
6
R
3
5
.
6
k
V
T
T
2
4
V
T
T
S
N
S
2
C
7
1
0
µ
F
x
2
V
T
T
R
E
F
5
C
3
3
3
n
F
PGND
1
8
VTTGND
1
V
V
D
D
P
f
o
r
D
D
R
I
I
G
N
D
f
o
r
D
D
R
I
I
I
*
:
O
p
t
i
o
n
a
l
R
T
O
N
V
V
D
D
P
5
V
V
T
T
0
.
9
V
/
0
.
7
5
V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27

RT8207LGQW

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Buy RT8207LGQW
Manufacturer:
Description:
IC REG CTRLR DDR 1OUT 24WQFN
Lifecycle:
New from this manufacturer.
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