WS4639
WS4639
Configurable Reset Timer with Integrated
Load Switch
Descriptions
The WS4639 is both a timer for resetting a mobile
device and an advanced load management switches
for applications requiring a highly integrated solution.
Output auto-discharge while the device shutdown
made output voltage off quickly. Thermal shutdown
function can protect the device and load.
The WS4639 is available in CSP-12L package.
Standard product is Pb-free and Halogen-free.
(Top View)
Http//:www.sh-willsemi.com
Features
Input voltage range
Main switch R
ON
: 1.8~5.5V
: 23mΩ @ V
BAT
=3.8V, Typ.
Continue output current :
3.8A (JEDEC 2S2P, No VIA)
4.5A (JEDEC 2S2P, Thermal VIA)
Slew Rate / Inrush Control with t
R
: 2.7ms (Typ.)
Factory Programmed Reset Delay: 7.5s
Factory Programmed Reset Pulse: 400ms
Factory Customized Turn-on Time: 2.3s
Factory Customized Turn-off Delay: 7.3s
Adjustable Reset Delay Option with External
Resistor
Zero-Second Test-Mode Enable
Over-Voltage Protection: Allow Input Pins > VBAT
39
Y
W
= Device code
= Year code
= Week code
Marking
(Bottom View)
Pin configuration
Applications
Smart Phones
Tablet PCs
Order information
Device
WS4639FC-12/TR
Package
CSP-12L
(1.16*1.56)
Shipping
3000/Reel&Tape
Will Semiconductor Ltd.
1
Apr, 2015 - Rev. 1.1
WS4639
Typical Applications
Figure 1. Typical Application without power path system
Figure 2. Typical Application with power path system
Will Semiconductor Ltd.
2
Apr, 2015 - Rev. 1.1
WS4639
Pin Descriptions
Pin Number
A1, A2, A3
B1, B2, B3
C1
C2
C3
Symbol
VOUT
VBAT
GND
DSR
/SR0
Switch Output
Supply Input
Ground
Delay selection input, connected to GPIO with
100KΩ pull-up or to VBAT directly without
pull-up resistor
Power-on or reset input, active LOW
Reset delay adjustment, Must tie to VBAT
D1
DELAY_ADJ
directly if not used. To adjust the reset delay, a
resistor (R
ADJ
) is connected between this pin
and ground
Load switch disable, Rising Edge Triggered,
D2
OFF
changes load switch from ON state to OFF
state
D3
SYS_WAKE
System wake-up input, changes load switch
from OFF state to ON state
NA
NA
Connect to VBAT or GND
Logic Low Level
Logic Low Level
Descriptions
Zero-Second Factory
Test-Mode
(1)
Switch Output
Supply Input
Ground
Note: (1)
Zero-Second Factory Test-Mode applies only to t
VON
and t
PHL1
.
Block Diagram
Figure 3. Block Diagram
Will Semiconductor Ltd.
3
Apr, 2015 - Rev. 1.1
WS4639
Absolute maximum ratings
Parameter
VBAT VOUT pin voltage range
Other pin voltage range
Power Dissipation @25
o
C, (I
OUT
= 4.5A)
Junction-to-Ambient Thermal Resistance
Junction-to-Case
Thermal Resistance
Junction temperature
Lead temperature(Soldering, 10s)
Storage temperature
VBAT VOUT Pin ESD Ratings
All other Pins ESD Ratings
Symbol
V
BAT
, V
OUT
V
P
D
θ
JA
θ
JC
T
J
T
L
Tstg
HBM
CDM
HBM
CDM
Value
-0.3½6.5
-0.3~5.5
0.34
85
48
150
260
-65 ~ 150
10000
2000
8000
2000
o
o
Unit
V
V
W
C/W
C/W
o
C
C
o
C
o
V
V
V
V
These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum
Ratings” may cause substantial damage to the device. Functional operation of this device at other conditions
beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may
affect device reliability.
Recommend Operating Conditions
Parameter
VBAT pin voltage range
(1)
/SR0, DSR, OFF, VOUT pin voltage range
SYS_WAKE pin voltage range
Operating ambient temperature
Note:
(1) When input pin have a voltage, ban VBAT float
T
A
Symbol
V
BAT
V
Value
1.8 ~ 5.5
0 ~ 5.5
0 ~ VBAT
-40 ~ 85
Unit
V
V
V
o
C
Will Semiconductor Ltd.
4
Apr, 2015 - Rev. 1.1
WS4639
DC Electronics Characteristics
(Ta=25
o
C, V
BAT=
4.5V, unless otherwise noted)
Parameter
Basic Operation
V
BAT
=4.5V,
V
OUT
=Open,
Load Switch = OFF
V
BAT
=4.5V,
Off Supply Current
I
OFF
V
OUT
=GND,
Load Switch = OFF
V
BAT
=3.8V,
V
OUT
=GND,
Load Switch = OFF
V
BAT
=5.5V, I
OUT
=1A
(1)
Ta=25
o
C
Ta=-40~85
o
C
Ta=25
o
C
Ta=-40~85
o
C
Ta=25
o
C
Ta=-40~85
o
C
20
21
23
24
28
37
65
1.2
0.4
±1
0.1
0.2
0.2
1
3
1
3
1
3
24
25
28
29
35
45
85
Ω
V
V
uA
mΩ
uA
uA
uA
uA
uA
uA
Symbol
Conditions
Min.
Typ.
Max.
Unit
V
BAT
=4.5V, I
OUT
=1A
(1)
On Resistance
R
ON
V
BAT
=3.8V, I
OUT
=500mA
(1)
V
BAT
=3.3V, I
OUT
=500mA
(1)
V
BAT
=2.5V, I
OUT
=500mA
(1)
V
BAT
=1.8V, I
OUT
=250mA
(1)
Output Discharge
R
PULL DOWN
Input High Voltage
(2)
Input Low Voltage
(2)
Input Leakage Current
(2)
R
PD
V
IH
V
IL
I
IN
V
BAT
=4.5V, V
OUT
= OFF, I
FORCE
=20mA
1.8V≤V
BAT
≤5.5V
0V≤V
BAT
≤5.5V
/SR0=5.5V, DSR=5.5V,
SYS_WAKE=5.5V, OFF =GND,
I
OUT
=0mA, V
BAT
=5.5V, Load
Switch=ON
/SR0=3.8V, DSR=3.8V,
SYS_WAKE=3.8V，OFF=GND，
I
OUT
=0mA, V
BAT
=3.8V, Load
Switch=ON
DSR=OFF=GND,
/SR0 = SYS_WAKE=1.2V,
V
BAT
=5.5V, Load Switch=ON
/SR0=GND, DSR=5.5V,
V
BAT
=5.5V, Load Switch =ON
0.3
3
μA
I
CCQ
Quiescent Current
0.1
3
μA
I
CCT
Dynamic
Current
Supply
2
6
μA
I
CC
20
40
μA
AC Electronics Characteristics
(Ta=25
o
C, V
BAT=
4.5V, unless otherwise noted)
Will Semiconductor Ltd.
5
Apr, 2015 - Rev. 1.1
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