slva132.pdf
Comparison and Selection of PC Card Power Controllers
1 Introduction
As the leading silicon manufacturer of the PC card power controllers, Texas Instruments
provides various power controllers with different features to meet the different needs of our
customers. These devices are ideal power managers to power PC cards, Smart cards, or
multimedia cards. The goal is to give customers greater flexibility in design, minimize the
components count, and reduce cost.
A family tree that includes all of the PC card power controllers from Texas Instruments is shown
in Figure 1.
2 Single-Slot PC Card Power Controllers
All the single-slot controllers support a parallel interface only. These devices have three different
supply inputs and two outputs. The main features of these devices are listed in Table 1.
2.1 TPS2211 and TPS2211A
The TPS2211 was the first single-slot PC Card power controller from Texas Instruments, and it is
used in many applications in notebook PCs, set top boxes, and PDAs. The device uses a 4-pin
parallel interface (VCC0, VCC1, VPP0, and VPP1) to control the switching from three input
supplies (12 V, 5 V, and 3.3 V) to two outputs (AVCC and AVPP). The 12-V supply can be
disabled if not required by its load, and either the 5-V (if 5 V is present) or 3.3-V (if 5 V is not
present) supply provide chip power for the whole device, which provides greater design
flexibility. With more customers using the TPS2211, new demands are encountered, such as
cost reduction and new packages. The TPS2211A uses the latest fabrication process from
Texas Instruments and has the same functionality as the TPS2211 but costs less. The
TPS2211A also adds a new package HTSSOP-20 (PowerPAD) that minimizes temperature
rise caused by power dissipation.
2.2 TPS2212
The TPS2212 has lower current ratings on the AVCC switches and higher current ratings on the
AVPP switches than those of the TPS2211 and TPS2211A as shown in Table 1. The functionality
of the TPS2212 is the same as the TPS2211 and the TPS2211A. The device is suitable for
low-power PC card applications.
DatasheetDoc-Texas Instruments TI pdf datasheet download
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