Texas Instruments TECHNOLOGY FOR INNOVATORS 4Q 2006 - Manual (Page 34)

Interface Selection Guide Texas Instruments 4Q 2006
TPS2211A
• Fully integrated V
CC
and V
PP
switching for
single-slot PC card
interface
• Low r
DS(on)
• 3.3-V low-voltage
mode
• Short-circuit and
thermal protection
• Compatible with
3.3-V, 5-V and 12-V
PC cards
AVCC
AVCC
AVCC
AVPP
VCCD0
VCCD1
VPPD0
VPPD1
OC
SHDN GND
0.1 µF
0.1 µF
VCC1
VCC2
Vpp1
Vpp2
PC Card
Connector
PCMCIA
Controller
VCC_EN0
VCC_EN1
VPP_EN0
VPP_EN1
CS To CPU
TPS2211A
12 V
5 V
5 V 0.1 µF
5 V
3.3 V
3.3 V 0.1 µF
3.3 V
Shutdown Signal From CPU
12 V
+
+
0.1 µF
+
Design Considerations
ExpressCard Power Switches
The TPS2231 and TPS2236 ExpressCard
power interface switches provide the total
power management solution required by the
ExpressCard specification. The TPS2231 and
TPS2236 ExpressCard power interface
switches distribute 3.3 V, AUX and 1.5 V to
the ExpressCard socket. Each voltage rail is
protected with integrated current-limiting
circuitry. The TPS2231 supports systems with
single-slot ExpressCardj34 or ExpressCardj54
sockets. The TPS2236 supports systems with
dual-slot ExpressCard sockets.
PCMCIA/CardBus Power Switches
Standard PC cards require that V
CC
be
switched between ground, 3.3 V and 5 V,
while V
PP
is switched between ground, 3.3 V,
5 V and 12 V. CardBay sockets have the
standard requirements for V
CC
, but require
ground, 3.3 V and 5 V to V
PP
, and ground,
1.8 V or 3.3 V to V
CORE
. Other PC card
applications may simply not need 12 V or V
PP
while still having the standard requirements
for V
CC
. Therefore, consider the voltage
requirements of the application when select-
ing a PCMCIA power switch.
Current-Limiting Power Switches
Power switches are used to intelligently
turn power on and off, while providing fault
protection. They are useful anywhere controlled
allocation of power is needed to circuit
blocks, modules, add-in cards or cabled
connections. They are ideal for power
sequencing or segmentation.
To minimize voltage drop, select devices
with the lowest r
DS(on)
or Drain to Source
on-resistance.
Power MUX ICs
Power MUX ICs are designed to transition
from a main power supply to an auxiliary
source when the main supply shuts down
(e.g. switching from battery operation to a
wall adapter).
Typical PC card power-distribution application.
PCMCIA/CardBus Power Switch Matrix ICs
Current Limit (min) (A)
0.3 0.7 1.0 2.5
3.3 V, 5 V, 12 V, V
PP
Dual — — TPS2224(A), TPS2226(A), TPS2204A, TPS2206A, TPS2205 —
Single TPS2212 — TPS2204A, TPS2210A, TPS2211(A), TPS2220A, TPS2220B TPS2231
No 12 V
Dual — — TPS2223A TPS2236
Single — TPS2044B/54B — —
No V
PP
Dual — TPS2044B/54B — —
ExpressCard Power Switch ICs
Device Ports 3V r
DS
(on) (m Ω) Interface Current Limit (Min) (A)
TPS2231 1 45 Parallel 2.5
TPS2236 2 45 Parallel 2.5
Power MUX ICs
I
OUT
Configuration Device (mA) Transition Comments
TPS2100/1 IN1: 500, IN2: 10 Manual SOT-23, 0 to 70°C
TPS2102/3 IN1: 500, IN2: 100 Manual SOT-23, 0 to 70°C
TPS2104/5 IN1: 500, IN2: 100 Manual SOT-23, –40 to 85°C
IN1 TPS2110A Adj. 310 to 750 Auto/Manual TSSOP
IN2 TPS2111A Adj. 630 to 1250 Auto/Manual TSSOP
TPS2112A Adj. 310 to 750 Auto TSSOP, Status pin
TPS2113A Adj. 630 to 1250 Auto TSSOP, Status pin
TPS2114A Adj. 310 to 750 Auto/Manual TSSOP, Status pin
TPS2115A Adj. 630 to 1250 Auto/Manual TSSOP, Status pin
Current-Limiting Power Switch ICs
Current Limit (min) (A)
0.22 0.3 0.345 0.66 0.7 1.1 1.65 2.2
Fault Reporting
Quad — TPS2048A/58A TPS2048/58 1 — TPS2044/54 2
TPS2044A/54A — — —
TPS2095/6/7 TPS2044B/54B
TPS2085/6/7
Triple — TPS2047B/57A TPS2047/57 1 — TPS2043/53 2 — — —
TPS2043A/53A
TPS2043B/53B
Dual — TPS2046B/56A TPS2046/56 1 — TPS2042/52 2 — — —
TPS2090/1/2 TPS2042A/52A
TPS2042B/52B
TPS2080/1/2
Single TPS2020/30 1 TPS2045A/55A TPS2045/55 1 TPS2021/31 1 TPS2041/51 2 TPS2022/32 TPS2023/33 TPS2024/34
TPS2041A/51A
TPS2041B/51B
No Fault Reporting
Single TPS2010A — — TPS2011A — TPS2012A TPS2013A —
1 Nemko recognized. 2 UL and Nemko recognized.
Power Distribution Devices Family of Products
34
CardBus Power Switches
➔