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PDF RT9725A Data sheet ( Hoja de datos )
| Número de pieza | RT9725A | |
| Descripción | Express Card Power Interface Switch | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9725A (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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RT9725A/B
Express Card Power Interface Switch
General Description
The RT9725A/B power distribution switches are designed
to fulfill power management requirements of Express Card
specification. The RT9725A/B supports systems with
single slot ExpressCard|34 and ExpressCard|54 socket.
The device distributes 3.3V, AUX and 1.5V to the Express
Card socket. Each power rail is protected with current
limit circuitry when output load exceeds over-current
threshold or short-circuits occurs. A thermal protection
circuit turns off switches to prevent the device from damage
when power dissipation is increased by continuous heavy
overloads or short-circuits in the switches. The
RT9725A/B is available in WQFN-20L 3x3 package.
Features
z Meets Express Card Standard (ExpressCard|34 and
ExpressCard|54)
z Compliant with the Express Card Compliance
Check Lists, Compliance ID : EC100328
z Fully Satisfy the Express Card Implementation
Guidelines
z Supports Systems with WAKE Function
z TTL-Logic Compatible Input
z Under-Voltage Lockout Protection
z Over Current Protection
z Over Temperature Protection
z RoHS Compliant and Halogen Free
Ordering Information
Applications
RT9725A/B
z PCs
Package Type
QW : WQFN-20L 3x3 (W-Type)
z PDAs
z Digital Cameras
Lead Plating System
z TV and Set Top Boxes
G : Green (Halogen Free and Pb Free)
Note :
SYSRST Pull High Resistor
A : With Internal Resistor
B : Without Internal Resistor
Pin Configurations
(TOP VIEW)
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
For marking information, contact our sales representative
STBY
3.3VIN
3.3VOUT
NC
NC
1
2
3
4
5
20 19 18 17 16
GND
21
15 AUXOUT
14 NC
13 NC
12 1.5VIN
11 1.5VOUT
6 7 8 9 10
directly or through a Richtek distributor located in your
area.
WQFN-20L 3x3
DS9725A/B-01 April 2011
www.richtek.com
1
1 page  
RT9725A/B
Absolute Maximum Ratings (Note 1)
z Supply Voltage (AUXIN, 3.3VIN) ----------------------------------------------------------------------------------- −0.3V to 5V
z Supply Voltage 1.5VIN ----------------------------------------------------------------------------------------------- −0.3V to 2.5V
z Logic Input/Output Voltage ------------------------------------------------------------------------------------------ −0.3V to 5V
z Power Dissipation, PD @ TA = 25°C
WQFN-20L 3x3 -------------------------------------------------------------------------------------------------------- 1.667W
z Package Thermal Resistance (Note 2)
WQFN-20L 3x3, θJA --------------------------------------------------------------------------------------------------- 60°C/W
WQFN-20L 3x3, θJC -------------------------------------------------------------------------------------------------- 7.5°C/W
z Junction Temperature ------------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
z Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
z Supply Voltage (AUXIN, 3.3VIN) ----------------------------------------------------------------------------------- 3V to 3.6V
z Supply Voltage (1.5VIN) --------------------------------------------------------------------------------------------- 1.35V to 1.65V
z Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 100°C
z Ambient Temperature Range ---------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(V(3.3VIN) = V(AUXIN) = 3.3V, V(1.5VIN) = 1.5V, VSHDN = VSTBY = VSYSRST =3.3V, VCPPE = VCPUSB = 0V, PERST, FLG, RCLKEN are open,
all output voltage are unloaded; TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Power Switch
RDS (ON)_3 3
Switch On Resistance
RDS (ON)_1 5
RDS(ON)_AUX
Discharge Resistance
(3.3V/1.5V/AUX Output)
RDi sc ha rg e
Output Short-Circuit Current
(steady state value)
ISC _33
ISC _15
ISC _AUX
Total Input Quiescent
Current (Normal Operation)
IQ_33
IQ_15
IQ _AUX
Total Input Quiescent
Current (Shutdown Mode)
ISH DN_33
ISH DN_15
ISHDN _AUX
3.3VIN to 3.3VOUT,
IOUT = 1300mA
1.5VIN to 1.5VOUT,
IOUT = 650mA
AUXIN to AUXOUT,
IOUT = 275mA
VSHDN = 0V, IDischarge = 1mA
Output power into a short
Output are unloaded (Include CPPE
and CPUSB logic pull-up current)
VCPPE = VCPUSB = VSHDN = 0V,
discharge FETs are on (Include
CPPE, CPUSB and SHDN pull-up
current)
--
--
--
100
1350
670
275
--
--
--
--
--
--
90
90
120
300
2000
1000
450
25
25
250
5
5
280
120
120
160
500
2500
1300
600
30
30
280
10
10
310
mΩ
Ω
mA
μA
μA
DS9725A/B-01 April 2011
To be continued
www.richtek.com
5
5 Page 
RT9725A/B
AUXIN Quiescent Current vs. Temperature
220 No Load
210
200
190
180
170
160
150
-50
-25
0 25 50 75
Temperature (°C)
100
3.3VIN & 1.5VIN Quiescent Current vs. Temperature
30
No Load
25
20 3.3VIN
15
10
1.5VIN
5
0
-50
-25
0 25 50
Temperature (°C)
75
100
AUXIN Shutdown Current vs. Temperature
200
190
180
170
160
150
140
130
-50
-25
0 25 50
Temperature (°C)
75
100
AUXOUT Current Limit vs. Temperature
0.6
0.5
0.4
0.3
0.2
0.1
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Temperature (°C)
3.3VIN & 1.5VIN Shutdown Current vs. Temperature
20
18
16
14
12
10
8 3.3VIN
6
4
2
0
-50
-25
1.5VIN
0 25 50 75
Temperature (°C)
100
3.3VOUT Current Limit vs. Temperature
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
-40
-20
0 20 40 60
Temperature (°C)
80
DS9725A/B-01 April 2011
www.richtek.com
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet RT9725A.PDF ] | |
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