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RICOH ELECTRONIC DEVICES CO., LTD.

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R5538 Series
Power Switch IC for Express Card

Product Specifications

The R5538 is the power interface switch IC for single slot ExpressCard and realizes the total power management function required by ExpressCard. The R5538 distributes 3.3V, 3.3Vaux, and 1.5V to the ExpressCard socket. Each voltage line is protected with a built-in current limit circuit and a thermal shutdown circuit in the R5538.

FEATURES

  • Meets the Express CardTM Standard
  • Built-in Over-current Limit
  • Built-in Clock Enable Function
  • With 3.3VIN and 3.3V AUXIN Sequence
  • Package: QFN-20

PIN DESCRIPTION

QFN0404-20

QFN0404-204.0 mm × 4.0 mm
1 STBY#
2 3.3VIN
3 3.3VOUT
4 3.3VIN
5 3.3VOUT
6 SYSRST#
7 GND
8 PERST#
9 CPUSB#
10 CPPE#
11 1.5VOUT
12 1.5VIN
13 1.5VOUT
14 1.5VIN
15 AUXOUT
16 NC
17 AUXIN
18 RCLKEN
19 OC#
20 SHDN#

R5538 Series for Consumer

APPLICATIONS

  • Express Card

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