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PDF R5531V002 Data sheet ( Hoja de datos )
| Número de pieza | R5531V002 | |
| Descripción | PCMCIA Power Controller | |
| Fabricantes | RICOH electronics | |
| Logotipo |  |
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R5531V002
Apr. 2003
PCMCIA Power Controller
IDESCRIPTION
The R5531V002 switches between the three VCC voltages (0V/3.3V/5.0V) and the VPP voltages (off/0V/3.3V/5.0V). If VCC
pin or VPP pin may be clamped to the GND, short current limit works at 1A(Min.) for VCC and 0.2A(Min.) for VPP.
The R5531V002 is suitable for standard PCMCIA power controllers.
IFEATURES
G Low on resistance P-channel MOSFET Switch
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G Built-in Open-drain Flag Pin
G Low Consumption Current
G Break-Before-Make Switching
G SSOP-16 pin Package
IAPPLICATIONS
PC card Power Supply Pin Voltage Switch
Card-bus Slot Power Supply Control
PC Card Reader/Writer
I PIN CONFIGURATION (Top view)
VCC 5_EN
VCC 3_EN
EN0
EN1
FLG
NC
NC
VPPOUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
VCC5 IN
VCC OUT
VCC5 IN
VCCOUT
VCC3 IN
NC
VCCOUT
Rev. 1.10
-1-
1 page  
A
VPP
Enable
0V
VPP to 3.3V
t9
t11
BC
VPP OFF
VPP to 5V
t15 t13
t 10 t12
D
VPP OFF
t16 t14
VPP
Output
0V
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FLG
0V
VPP Timing Diagram
I OPERATION
(1) Operation Description
When the VCCOUT =0V is selected, the IC switches into the sleep mode, and draws only nano-amperes of leakage current.
Without being VCCOUT=0V, if commanded to immediately switch from 5V to 3.3V or vice versa, enhancement of the second
switch begins after the first is OFF, realizing "break-before-make switching".
In case that an OUT pin may be clamped to the GND, if over-current would continue, the temperature of the IC would increase
drastically. If the temperature of the IC is beyond Typ. 135°C, the switch transistor turns off. Then, when the temperature of the
IC decreases by approximately 10°C, the switch transistor turns on. Unless the abnormal situation of OUT pin is removed or
turned off, the switch transistor repeats on and off.
Short over-current level is set internally in the IC. There are two types of response against over-current: (1) Under the condition
that OUT pin is short or large capacity is loaded, if the IC is enabled, the IC becomes constant current state immediately.
Current level of constant current is short current limit. (2) While the switch transistor is on, if OUT pin is short or large capacity
is loaded, until the current limit circuit responds, large transient current flows. The transient current depends on the impedance
between the power supply circuit, VCC5IN/VCC3IN and load capacitance. In other words, the transient current depends on the
transient response characteristics of the power supply circuit, VCC5IN/VCC3IN, PCB layout, and the connector of the card.
After the transient current is beyond the current limit threshold and current limit circuit responds, the IC becomes into the
constant current mode, and the current level is equal to short current limit.
Rev. 1.10
-5-
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