richtek RT8205A, RT8205B, RT8205C Datasheet
RT8205A/B/C
High-Efficiency, Main Power Supply Controllers
for Notebook Computers
General Description
The RT8205A/B/C dual step-down, switch-mode powersupply controller generates logic-supply voltages in
battery-powered systems. The RT8205A/B/C includes two
pulse-width modulation (PWM) controllers fixed at 5V/
3.3V or adjustable from 2V to 5.5V . An alternative LGA TE1
output LG1_CP can be used for external charge pump
(RT8205B). And a n optional external charge pump ca n be
monitored through SECFB (RT8205C). This device also
features 2 linear regulators providing fixed 5V and 3.3V
outputs. The linear regulator each provides up to 70mA
output current with automatic linear-regulator bootstrapping
to the PWM outputs. The RT8205A/B/C includes on-board
power-up sequencing, the power-good output, internal softstart, and internal soft-discharge output that prevents
negative voltages on shutdown.
A consta nt on-time PWM control scheme operates without
sense resistor and provides 100ns response to load
transients while maintaining a relatively consta nt switching
frequency. The unique ultrasonic mode maintains the
switching frequency above 25kHz, which eliminates noise
in audio applications. Other features include diodeemulation mode (DEM), which maximizes efficiency in
light-load a pplications, a nd fixed-frequency PWM mode,
which reduces RF interference in sensitive a pplication
Features
zz
Wide Input Voltage Range 6V to 25V
z
zz
zz
z Dual Fixed 5V/3.3V Outputs or Adjustable from 2V
zz
to 5.5V, 1.5% Accuracy.
zz
z Alternative LGA TE1 Output (LG1_CP) acts a s Clock
zz
for Charge Pump (RT8205B)
zz
z Secondary Feedback Input Maintains Charge Pump
zz
V oltage (RT8205C).
zz
z Fixed 3.3V and 5V LDO Output : 70mA
zz
zz
z 2V Reference Voltage ±1% : 50uA
zz
zz
z Constant ON-Time Control with 100ns Load Step
zz
Response
zz
z Frequency Selectable via TONSEL Setting
zz
zz
z R
zz
Current Sensing and Progra mmable Current
DS(ON)
Limit combined with Enable Control
zz
z Selectable PWM, DEM, or Ultrasonic Mode
zz
zz
z Internal Soft-Start and Soft-Discharge
zz
zz
z High Efficiency up to 97%
zz
zz
z 5mW Quiescent Power Dissipation
zz
zz
z Thermal Shutdown
zz
zz
z RoHS Compliant and Halogen Free
zz
Applications
z Notebook and Sub-Notebook Computers
z 3-Cell and 4-Cell Li+ Battery-Powered Devices
Ordering Information
RT8205
Package Type
QW : WQFN-24L 4x4 (W-Type)
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Lead Plating System
G : Green (Halogen Free and Pb Free)
Pin Function
A : Default
B : With LG1_CP
C : With SECFB
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.
DS8205A/B/C-05 April 2011 www.richtek.com
1
RT8205A/B/C
Pin Configurations
UGATE1
BOOT1
21 20 1924 2223
25
BOOT2
UGATE2
LGATE1
PHASE1
18
17
16
15
14
13
LGATE2
PHASE2
NC
VREG5
VIN
GND
SKIPSEL
EN
VOUT1
PGOOD
FB1
REF
FB2
1
2
3
4
5
6
78910 1211
VOUT2
VREG3
GND
ENTRIP1
TONSEL
ENTRIP2
RT8205A
WQFN-24L 4x4
Typical Application Circuit
For Fixed V oltage Regulator
ENTRIP1
FB1
REF
TONSEL
FB2
ENTRIP2
(TOP VIEW)
UGATE1
VOUT1
PGOOD
BOOT1
1
2
3
4
5
6
WQFN-24L 4x4
21 20 1924 2223
GND
25
78910 1211
VOUT2
VREG3
BOOT2
UGATE2
RT8205B
LGATE1
PHASE1
18
17
16
15
14
13
LGATE2
PHASE2
LG1_CP
VREG5
VIN
PGND
SKIPSEL
EN
ENTRIP1
FB1
REF
TONSEL
FB2
ENTRIP2
UGATE1
VOUT1
PGOOD
BOOT1
1
2
3
4
5
6
21 20 1924 2223
GND
25
78910 1211
VOUT2
VREG3
BOOT2
UGATE2
RT8205C
WQFN-24L 4x4
LGATE1
PHASE1
18
17
16
15
14
13
LGATE2
PHASE2
SECFB
VREG5
VIN
PGND
SKIPSEL
EN
V
I
7
1
C
F
u
0
1
Q1
BSC119
N03S
1
L
H
6
.
u
V
1
T
U
O
V
5
3
C
F
u
0
2
2
8
5
R
BSC119
N03S
4
C
e
u
q
r
F
e
M
/
E
D
M
W
P
0
Q3
n
t
o
C
r
c
y
n
o
n
s
/
U
l
t
r
a
ON
OFF
R
.
9
3
16
6
C
F
.
0
1
u
4
R
0
21
0
3
R
2
C
F
.
u
1
22
20
19
24
1
1
C
u
F
2
2
.
0
l
o
i
c
3
4
14
13
2
5
VIN
UGATE1
BOOT1
PHASE1
LGATE1
VOUT1
REF
TONSEL
SKIPSEL
EN
FB1
FB2
RT8205A
UGATE2
BOOT2
PHASE2
LGATE2
VOUT2
VREG5
PGOOD
VREG3
ENTRIP1
ENTRIP2
GND
10
9
11
12
7
17
23
8
1
6
15, Exposed Pad (25)
R
9
0
R
8
0
Q2
BSC119
N03S
C
7
1
.
u
0
F
Q4
BSC119
N03S
C
5
4
7
.
1
2
C
4
7
.
R
u
F
u
F
6
1
0
k
0
R
1
1
0
5
k
R
2
1
0
5
k
C
9
C
1
0
u
L
7
4
.
R
0
1
C
0
1
5
w
a
l
A
V
P
G
O
O
D
3
3
.
w
A
l
V
8
F
1
0
u
2
u
H
y
O
n
s
n
I
c
i
o
a
d
r
t
a
s
O
n
y
N
F
V
2
O
U
T
3
3
.
V
1
3
C
2
2
0
u
F
DS8205A/B/C-05 April 2011www.richtek.com
2
RT8205A/B/C
V
N
7
.
c
U
C
u
1
OFF
y
l
R
.
3
9
16
0
1
C
F
u
.
0
1
4
R
0
21
0
3
R
22
VIN
UGATE1
BOOT1
RT8205B
UGATE2
BOOT2
PHASE2
LGATE2
10
9
11
12
2
F
ON
t
r
o
n
o
C
i
o
c
n
t
r
s
a
20
PHASE1
19
LGATE1
24
VOUT1
18
LG1_CP
3
1
C
.
2
0
l
REF
5
F
u
2
13
EN
4
TONSEL
14
SKIPSEL
PGOOD
ENTRIP1
ENTRIP2
VOUT2
VREG5
VREG3
PGND
FB1
FB2
GND
7
17
23
8
1
6
15
2
5
Exposed Pad (25)
1
C
F
u
0
1
Q1
BSC119
N03S
L
1
H
u
8
.
V
1
U
T
O
V
5
3
C
F
u
0
2
2
6
5
R
BSC119
N03S
4
C
1
D
6
C
D
1
0
.
C
1
0
.
2
u
F
3
D
4
D
4
5
2
T
A
B
8
u
F
Q3
C
0
0
0
5
1
.
F
u
7
C
1
.
u
F
CP
n
r
e
u
e
q
F
/
/
M
M
E
D
W
P
R
9
0
R
8
0
Q2
BSC119
N03S
C
7
0
.
1
u
F
Q4
BSC119
N03S
C
9
4
7
.
6
C
1
4
7
.
R
u
F
F
u
6
1
0
0
k
R
1
1
5
0
k
R
2
1
5
0
k
C
1
3
C
1
0
u
L
7
.
4
R
1
0
C
4
1
5
A
V
l
w
a
y
P
G
O
O
D
3
3
.
V
w
A
l
1
F
1
0
u
2
u
H
s
O
n
n
I
d
i
c
a
o
t
r
a
O
n
y
s
I
2
F
V
O
U
T
2
3
3
.
V
C
1
7
2
0
2
u
F
V
N
8
1
C
F
u
0
1
Q1
BSC119
N03S
1
L
H
6
u
.
V
1
T
U
O
3
C
u
F
0
2
2
8
5
R
BSC119
N03S
4
C
1
D
6
C
0
.
C
0
.
D
1
1
2
F
u
3
D
4
D
4
5
2
A
T
B
8
u
F
CP
Q3
0
0
0
5
C
u
1
F
.
7
C
1
F
.
u
6
R
2
0
0
k
8
1
C
ON
R
.
9
3
16
0
1
C
.
F
1
u
0
4
R
0
21
0
3
R
2
C
F
u
.
1
22
20
19
24
3
5
C
1
F
u
2
2
0
.
2
5
18
7
R
3
9
k
13
VIN
UGATE1
BOOT1
PHASE1
LGATE1
VOUT1
REF
FB1
FB2
SECFB
EN
RT8205C
UGATE2
BOOT2
PHASE2
LGATE2
VOUT2
VREG5
PGOOD
VREG3
ENTRIP1
ENTRIP2
TONSEL
SKIPSEL
PGND
GND
10
9
11
12
7
17
23
8
1
6
4
14
15
Exposed Pad (25)
1
R
0
0
Q2
BSC119
R
9
0
C
0
N03S
1
1
1
.
u
F
Q4
BSC119
N03S
C
9
4
7
.
C
1
6
4
7
.
q
F
e
r
M
W
P
R
u
F
u
F
u
e
/
6
1
0
k
0
R
1
1
0
5
k
R
2
1
0
5
k
n
y
c
o
C
r
o
t
n
l
o
s
/
l
M
U
t
r
a
E
D
C
1
3
C
1
0
u
L
4
7
.
1
R
1
C
4
1
5
A
V
w
l
a
y
P
G
O
O
D
A
3
3
.
V
w
l
i
c
n
1
F
1
0
u
2
u
H
O
s
n
n
c
i
I
a
d
o
t
r
a
s
O
y
n
I
2
F
V
O
U
T
2
3
3
.
V
1
7
C
2
2
0
u
F
OFF
DS8205A/B/C-05 April 2011 www.richtek.com
3
RT8205A/B/C
For Adjustable V oltage Regulator
C
1
u
F
0
1
Q1
BSC119
N03S
L
1
H
8
.
u
V
O
U
T
1
V
5
3
C
u
2
0
F
2
5
1
C
1
.
0
6
r
M
BSC119
N03S
u
e
q
e
E
D
/
Q3
y
C
c
o
n
r
t
l
a
U
M
/
R
5
C
4
4
1
C
F
u
1
1
R
k
1
5
2
R
1
k
1
0
F
W
P
OFF
V
I
R
7
3
9
.
16
C
6
1
.
u
F
0
0
4
R
R
C
2
F
.
u
1
0
21
0
3
22
20
19
24
VIN
UGATE1
BOOT1
PHASE1
LGATE1
VOUT1
RT8205A
UGATE2
BOOT2
PHASE2
LGATE2
VOUT2
FB2
ENTRIP1
ENTRIP2
2
FB1
3
4
14
13
REF
TONSEL
SKIPSEL
EN
1
1
C
F
2
u
0
2
.
n
o
r
t
l
c
i
n
o
s
ON
GND
VREG5
PGOOD
VREG3
R
9
10
9
11
0
8
0
R
7
C
0
u
.
1
12
7
5
1
R
k
5
1
1
6
0
2
R
5
k
0
1
15, Exposed Pad (25)
17
5
C
4
.
7
F
u
23
8
1
C
2
4
.
7
F
u
F
Q2
BSC119
N03S
Q4
BSC119
N03S
R
6
0
0
1
k
9
C
1
4
R
1
C
V
5
l
w
A
O
G
P
O
.
3
3
V
A
C
u
0
L
.
7
8
F
u
1
0
2
u
H
0
1
0
R
.
6
R
1
0
a
n
O
s
y
D
I
n
d
i
c
o
a
t
r
a
l
w
s
y
n
O
N
F
V
U
O
2
T
3
.
3
C
2
1
3
5
k
1
4
k
V
3
1
0
2
u
F
1
7
C
6
C
1
F
.
u
0
1
V
I
R
C
1
F
0
u
1
Q1
BSC119
N03S
L
1
H
8
u
.
V
T
1
O
U
V
5
3
C
F
u
2
0
2
6
R
5
BSC119
C
N03S
4
Q3
1
0
.
7
.
9
3
16
0
C
1
F
u
.
1
0
R
0
4
21
0
R
3
22
C
2
F
u
20
19
24
C
1
8
1
R
1
5
k
1
9
C
1
u
F
1
.
0
2
R
1
1
0
k
C
6
D
0
.
1
C
0
.
1
2
u
F
D
4
B
8
u
F
CP
P
C
5
D
1
0
.
u
1
F
C
7
D
3
0
.
1
u
F
5
4
T
2
A
ON
OFF
o
r
t
C
o
u
F
e
q
r
D
E
M
/
W
n
e
n
y
c
c
i
n
a
o
s
r
t
l
U
/
M
2
18
3
C
1
5
F
u
0
2
2
.
13
l
4
14
VIN
UGATE1
BOOT1
PHASE1
LGATE1
VOUT1
FB1
LG1_CP
REF
EN
TONSEL
SKIPSEL
RT8205B
UGATE2
BOOT2
PHASE2
LGATE2
VOUT2
FB2
ENTRIP1
ENTRIP2
GND
VREG5
PGOOD
VREG3
PGND
10
9
11
12
7
5
1
6
Exposed Pad (25)
17
23
8
15
9
R
0
8
R
0
Q2
BSC119
N03S
7
C
.
0
1
F
u
Q4
BSC119
N03S
1
R
k
0
5
1
2
R
1
0
5
k
C
9
.
7
4
u
1
C
6
4
.
7
u
6
R
F
0
0
k
1
F
C
3
1
u
0
1
L
4
.
7
1
R
0
C
1
4
V
5
l
a
A
w
P
O
O
G
D
V
.
3
3
l
A
w
1
C
F
1
u
0
2
u
H
R
.
6
R
0
1
y
n
s
O
I
d
n
i
c
t
r
o
a
y
a
s
n
O
N
2
F
V
U
2
O
T
3
3
.
V
1
C
7
2
2
0
F
u
1
2
C
1
3
5
k
1
4
k
0
2
C
F
u
1
0
.
DS8205A/B/C-05 April 2011www.richtek.com
4
RT8205A/B/C
V
N
8
1
C
F
u
0
1
Q1
BSC119
N03S
1
L
H
6
u
.
V
1
T
U
O
3
C
u
F
0
2
2
8
1
C
R
1
C
9
1
1
0
.
R
F
u
1
8
5
R
BSC119
N03S
4
C
2
1
k
5
3
1
k
0
C
6
0
.
u
1
F
8
C
0
.
1
F
u
CP
D
2
4
D
B
OFF
1
D
D
5
2
T
A
ON
0
Q3
5
C
0
.
u
1
F
7
C
3
0
1
.
u
F
6
R
4
2
0
0
1
C
R
.
9
3
16
0
1
C
.
F
1
u
0
4
R
0
21
0
3
R
2
C
F
u
.
1
k
8
22
20
19
24
2
3
5
C
1
F
u
2
0
.
2
18
7
R
3
9
k
13
VIN
UGATE1
BOOT1
PHASE1
LGATE1
VOUT1
FB1
REF
SECFB
EN
RT8205C
UGATE2
BOOT2
PHASE2
LGATE2
VOUT2
FB2
ENTRIP1
ENTRIP2
GND
VREG5
PGOOD
VREG3
TONSEL
SKIPSEL
PGND
10
9
11
12
7
5
1
6
Exposed Pad (25)
17
23
8
4
14
15
1
R
0
0
R
9
0
C
9
u
4
7
.
C
1
6
u
4
7
.
Q2
BSC119
N03S
C
1
1
1
.
0
u
F
Q4
BSC119
N03S
1
R
1
0
5
k
R
2
1
0
5
k
R
6
F
1
0
0
k
F
C
1
3
1
0
4
R
1
C
5
V
w
l
A
O
P
G
O
3
3
.
V
A
F
r
e
u
q
e
/
M
D
W
P
C
F
u
1
0
L
2
7
.
u
H
1
4
1
R
.
6
R
0
1
s
a
y
O
n
n
i
I
d
D
c
a
o
t
r
w
a
l
s
y
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DS8205A/B/C-05 April 2011 www.richtek.com
5
RT8205A/B/C
Function Block Diagram
TONSEL SKIPSEL
BOOT1
UGATE1
PHASE1
LGATE1
PGND
VOUT1
FB1
ENTRIP1
EN
VREG5
VIN
VREG5
PWM Buck
Controller
Power-On
Sequence
Clear Fault Latch
SW Threshold
VREG5
Function Block Di agra m
SMPS1
Thermal
Shutdown
SMPS2
PWM Buck
Controller
SW Threshold
REF
REF
VREG3
VREG5
BOOT2
UGATE2
PHASE2
LGATE2
VOUT2
FB2
ENTRIP2
PGOOD
GND
VREG3
VOUT
REF
PGOOD
FB
+
1.1 x V
0.7 x V
0.9 x V
+
-
REF
REF
REF
On-Time
Compute
VINTONSEL
T
Comp
+
Over-Voltage
+
-
+
Under-Voltage
+
ON
Q
1-Shot
TRIG
Fault
Latch
Blanking
Time
R
25kHz
Detector
TRIG
SS
Time
Detector
Zero
T
1-Shot
Q
OFF
Current
+
-
+
+
-
Limit
VREG5
+
-
UGATE
LGATE
ENTRIP
PHASE
SKIPSEL
PWM Controller (One Side)
DS8205A/B/C-05 April 2011www.richtek.com
6
Functional Pin Description
RT8205A/B/C
ENTRIP1 (Pin 1)
Channel 1 enable a nd Current Limit setting Input. Connect
resistor to GND to set the threshold for channel 1
synchronous R
limit threshold is 1/10th the voltage seen at ENTRIP1 over
a 0.5V to 2V range. There is an internal 10uA current source
from VREG5 to ENTRIP1. The logic current limit threshold
is default to 200mV value if ENTRIP1 is higher than
VREG5-1V.
FB1 (Pin 2)
SMPS1 Feedback Input. Connect FB1 to VREG5 or GND
for fixed 5V operation. Or connect FB1 to a resistive voltagedivider from VOUT1 to GND to adjust output from 2V to
5.5V.
REF (Pin 3)
2V Reference Output. Bypass to GND with a 0.22uF
cap acitor . REF ca n source up to 50uA f or external loads.
Loading REF degrades FBx and output a ccuracy a ccording
to the REF load-regulation error.
sense. The GND-PHASE1 current-
DS(ON)
from VREG5 to ENTRIP2. The logic current limit threshold
is default to 200mV value if ENTRIP2 is higher than
VREG5-1V.
VOUT2 (Pin 7)
SMPS2 Output Voltage-Sense Input. Connect to the
SMPS2 output. VOUT2 is an input to the on-time oneshot circuit. It also serves as the SMPS2 feedback input
in fixed-voltage mode.
VREG3 (Pin 8)
3.3V Linear Regulator Output.
BOOT2 (Pin 9)
Boost Flying Cap acitor Conne ction for SMPS2. Connect
to an external ca pa citor according to the typical a pplication
circuits.
UGA TE2 (Pin 10)
High-Side MOSFET Floating Gate-Driver Output for
SMPS2. UGA TE2 swings between PHASE2 and BOOT2.
TONSEL (Pin 4)
Frequency Selectable Input for VOUT1/VOUT2
respectively .
400kHz/500kHz : Connect to VREG5 or VREG3
300kHz/375kHz : Connect to REF
200kHz/250kHz : Connect to GND
FB2 (Pin 5)
SMPS2 Feedback Input. Connect FB2 to VREG5 or GND
for fixed 3.3V operation. Or connect FB2 to a resistive
voltage-divider from VOUT2 to G ND to adjust output from
2V to 5.5V.
ENTRIP2 (Pin 6)
Channel 2 enable a nd Current Limit setting Input. Connect
resistor to GND to set the threshold for channel 2
synchronous R
limit threshold is 1/10th the voltage seen at ENTRIP2 over
a 0.5V to 2V range. There is an internal 10uA current source
sense. The GND-PHASE2 current-
DS(ON)
PHASE2 (Pin 11)
Inductor Connection for SMPS2. PHASE2 is the internal
lower supply rail for the UGATE2 high-side gate driver.
PHASE2 is also the current-sense input for the SMPS2.
LGA TE2 (Pin 12)
SMPS2 Synchronous-Rectifier Gate-Drive Output.
LGA TE2 swings between GND and VREG5.
EN (Pin 13)
Master Enable Input. The REF/VREG5/VREG3 are
enabled if it is within logic high level and disable if it is
less than the logic low level.
SKIPSEL (Pin 14)
Operation Mode Selectable Input.
Ultrasonic Mode : Connect to VREG5 or VREG3
Diode Emulation Mode : Connect to REF
PWM Mode : Connect to GND
DS8205A/B/C-05 April 2011 www.richtek.com
7
RT8205A/B/C
GND [Pin 15 (RT8205A), Exposed Pad (25)]
Analog Ground for SMPS controller. The exposed pad
must be soldered to a large PCB and connected to GND
for maximum power dissipation.
PGND (Pin 15) (RT8205B/C)
Power Ground for SMPS controller. Connect PGND
externally to the underside of the exposed pad.
VIN (Pin 16)
High Voltage Power Supply Input for 5V/3.3V LDO and
Feed-forward ON-Ti me circuitry .
VREG5 (Pin 17)
5V Linear Regulator Output.VREG5 is also the supply
voltage for the low-side MOSFET driver a nd analog supply
voltage for the device.
NC (Pin 18) (RT8205A)
No Internal Connection.
BOOT1 (Pin 22)
Boost Flying Cap acitor Conne ction for SMPS1. Connect
to an external ca pa citor according to the typical a pplication
circuits.
PGOOD (Pin 23)
Power Good Output f or channel 1 a nd channel 2. (Logical
AND)
VOUT1 (Pin 24)
SMPS1 Output Voltage-Sense Input. Connect to the
SMPS1 output. VOUT1 is an input to the on-time oneshot circuit. It also serves as the SMPS1 feedback input
in fixed-voltage mode.
LG1_CP (Pin 18) (RT8205B)
Alternative LGA TE1 Output for 14V charge pump.
SECFB (Pin 18) (RT8205C)
The SECFB is used to monitor the optional external 14V
charge pump. Connect a resistive voltage-divider from 14V
charge pump output to GND to detect the output. If SECFB
drops below the threshold voltage, LGA TE1 turns on f or
300ns (typ.). This will refresh the external charge pump
driven by LGATE1 without over-discharging the output
voltage.
LGA TE1 (Pin 19)
SMPS1 Synchronous-Rectifier Gate-Drive Output.
LGATE1 swings between GND and VREG5.
PHASE1 (Pin 20)
Inductor Connection for SMPS1. PHASE1 is the internal
lower supply rail for the UGATE1 high-side gate driver.
PHASE1 is also the current-sense input for the SMPS1.
UGATE1 (Pin 21)
High-Side MOSFET Floating Gate-Driver Output for
SMPS1. UGA TE1 swings between PHASE1 and BOOT1.
8
DS8205A/B/C-05 April 2011www.richtek.com
RT8205A/B/C
Absolute Maximum Ratings (Note 1)
z VIN, EN to GND----------------------------------------------------------------------------------------------- –0.3V to 28V
z BOOTx to GND------------------------------------------------------------------------------------------------ –0.3V to 34V
z PHASEx to GND
DC---------------------------------------------------------------------------------------------------------------- –0.3V to 28V
< 20ns ---------------------------------------------------------------------------------------------------------- −8V
z BOOTx to PHASEx------------------------------------------------------------------------------------------ –0.3V to 6V
z ENTRIPx, SKIPSEL, TONSEL, PGOOD, to GND---------------------------------------------------- –0.3V to 6V
z VREG5, VREG3, FBx, VOUTx, SECFB, REF to G ND --------------------------------------------- –0.3V to (VREG5 + 0.3V)
z UGATEx to PHASEx
DC---------------------------------------------------------------------------------------------------------------- –0.3V to (VREG5 + 0.3V)
< 20ns ---------------------------------------------------------------------------------------------------------- −5V
z LGA TEx to GND
DC---------------------------------------------------------------------------------------------------------------- –0.3V to (VREG5 + 0.3V)
< 20ns ---------------------------------------------------------------------------------------------------------- −2.5V
z Power Dissipation, P
WQFN-24L 4x4 ----------------------------------------------------------------------------------------------- 1.923W
z Package Thermal Resistance (Note 2)
WQF N-24L 4x4, θJA------------------------------------------------------------------------------------------ 52°C/W
WQFN-24L 4x4, θJC----------------------------------------------------------------------------------------- 7°C/W
z Lead T e mperature (Soldering, 10 sec.)------------------------------------------------------------------ 26 0°C
z Junction T emperature---------------------------------------------------------------------------------------- 150°C
z Storage T emperature Range ------------------------------------------------------------------------------- –65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) --------------------------------------------------------------------------------- 2kV
MM (Ma chine Mode)----------------------------------------------------------------------------------------- 200V
@ TA = 25°C
D
Recommended Operating Conditions (Note 4)
z Input V oltage, V
z Junction T emperature Range---------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient T emperature Range---------------------------------------------------------------------------------------- −40°C to 85°C
DS8205A/B/C-05 April 2011 www.richtek.com
------------------------------------------------------------------------------------------------------ 6V to 25V
IN
9
To be continued
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