MAX1602 Maxim, MAX1602 Datasheet - Page 9

• Manufacturer Part Number: MAX1602
• Description: Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network
• Manufacturer: Maxim

Table 3. “Databook” Code,
CODE = Mid-Supply (VY/2)
STBY = Standby Mode, X = Don’t Care
Figure 1. Detailed Block Diagram
A1VCC
_________Logic Truth Tables (cont.)
Single-Channel CardBus and PCMCIA VCC/VPP
0
0
0
0
1
1
1
1
A0VCC
0
0
1
1
0
0
1
1
CONTROL
INPUTS
AVPP
_______________________________________________________________________________________
0
1
0
1
0
1
0
1
12IN
VY
VY
VX
A0VPP
X
X
X
X
X
X
X
X
VDD
MAX1602
GND
GND
VCC
VY
VX
VY
VY
VX
VX
AND UVLO
DECODE
LOGIC
High-Z
GND
GND
GND
12IN
12IN
VCC
VCC
VPP
CHARGE
CHARGE
CHARGE
PUMP
PUMP
PUMP
VB5
VB12
VB3
SHDN
0.25
0.25
1
MODE
Active
Active
Active
Active
Active
Active
STBY
STBY
CURRENT
Power-Switching Network
LIMIT
CURRENT
CURRENT
LIMIT
LIMIT
SHUTDOWN
THERMAL
The MAX1602 power-switching IC contains a network of
low-resistance MOSFET switches that deliver selectable
VCC and VPP voltages to two CardBus or PC Card host
socket. Figure 1 is the detailed block diagram.
The power-input pins (VY, VX, 12IN) are completely
independent, however, power must always be applied
to VY for proper operation. Low inrush current is guaran-
teed by controlled switch rise times. VCC’s 100µs mini-
mum output rise time is 100% tested with a 1µF
capacitive load, and VPP’s 1ms minimum rise time is
guaranteed with a 0.1µF load. These respective capaci-
tive loads are chosen as worst-case card-insertion para-
meters. The internal switching control allows VCC and
VPP rise times to be controlled, and makes them nearly
_______________Detailed Description
6
40
40
VPP
VCC
VCC
VCC
VCC
FAULT
GND
9