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RT9725A の電気的特性と機能

RT9725AのメーカーはRichtekです、この部品の機能は「Express Card Power Interface Switch」です。


製品の詳細 ( Datasheet PDF )

部品番号 RT9725A
部品説明 Express Card Power Interface Switch
メーカ Richtek
ロゴ Richtek ロゴ 




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RT9725A Datasheet, RT9725A PDF,ピン配置, 機能
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 pdf, ピン配列
Function Block Diagram
RT9725A/B
AUXIN
3.3VIN
1.5VIN
CPUSB
CPPE
STBY
SHDN
GND
UVLO
Current
Limit
Current
Limit
Current
Limit
Power
Good
AUXOUT
3.3VOUT
1.5VOUT
FLG
Gate
Control
Charge
Pump
Oscillator
OTP
AUXIN
Delay
RT9725A Only
AUXIN
RCLKEN
PERST
SYSRST
DS9725A/B-01 April 2011
www.richtek.com
3


3Pages


RT9725A 電子部品, 半導体
RT9725A/B
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Power Switch
Forward Leakage Current
IL KF_ 33
IL KF_ 15
ILKF _AUX
VCPPE = VCPUSB = VSHDN = 3.3V,
(no card present, discharge FETs
are on) current measured at input
pins, include RCLKEN pull-up
current
--
--
--
Reverse Leakage Current
IL KR_ 33
IL KR_ 15
ILKR _AUX
V3.3VOUT = VAUXVOUT = 3.3V,
V1.5VOUT = 1.5V, all voltage inputs
are grounded (current measured
from output pins going in)
--
--
--
Thermal Shutdown
TSD
TSD
Rising temperature, not in over-
current condition
Rising temperature, in over-current
condition
--
--
ΔTSD
Hysteres is
--
Logic Selection (SHDN, STBY, CPPE, CPUSB, SYSRST, PERST, FLG, RCLKEN
0.1 50
0.1 50
20 50
5 10
5 10
5 10
130 --
100 --
20 --
μA
μA
°C
Logic Input Supply Current
Logic Input Voltage
RCLKEN Output Low
Voltage
PERST Assertion
Threshold of Output
Voltage (PERST asserted
when any of outputs falls
below the threshold)
PERST Assertion Delay
from Output Voltage
PERST De-assertion Delay
from Output Voltage
PERST Assertion Delay
from SYSRST
PERST Minimum Pulse
Width
PERST Output Voltage
ISHDN
ISTBY
ICPPE or
IC PUS B
ISYSRST
IR CLK EN
VIH
VIL
VP GO OD_3 3
VPGOOD _15
VPGOOD _AUX
VSHDN = 3.3V, Sinking
VSHDN = 0V, Sourcing
VSTBY = 3.3V, Sinking
VSTBY = 0V, Sourcing
VCPPE or VCPUSB = 3.3V, Sinking
VCPPE or VCPUSB = 0V, Sourcing
VSYSRST = 3.3V, Sinking
VSYSRST = 0V, Sourcing
VRCLKEN = 0V, Sourcing
High Level
Low Level
IRCLKEN = 60uA
3.3VOUT Falling
1.5VOUT Falling
AUXOUT Falling
3.3VOUT, AUXOUT or 1.5VOUT
falling
3.3VOUT, AUXOUT and 1.5VOUT
rising within tolerance
Maximum time from SYSRST
assertion
3.3VOUT, AUXOUT or 1.5VOUT
falling out of tolerance or triggered
by SYSRST
High Level, IPERST = 500μA
Low Level, IPERST = 500μA
--
--
--
--
--
--
--
--
--
2
--
--
2.7
1.2
2.7
--
4
--
100
2.4
--
01
20 35
01
20 35
01
20 35
01
20 35
20 35
-- --
-- 0.8
0.2 0.4
2.85 3
1.27 1.35
2.85 3
μA
V
V
V
300 500 ns
10 20 ms
-- 500 ns
250 --
μs
-- --
V
-- 0.4
To be continued
www.richtek.com
6
DS9725A/B-01 April 2011

6 Page



ページ 合計 : 17 ページ
 
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共有リンク

Link :


部品番号部品説明メーカ
RT9725A

Express Card Power Interface Switch

Richtek
Richtek
RT9725B

Express Card Power Interface Switch

Richtek
Richtek


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