TPS2211A

SINGLE-SLOT PC CARD POWER INTERFACE SWITCH

FOR PARALLEL PCMCIA CONTROLLERS

SLVS282A – SEPTEMBER 2000 – REVISED NOVEMBER 2002

16

POST OFFICE BOX 655303

APPLICATION INFORMATION

TPS2211A control logic

AVPP

CONTROL SIGNALS

INTERNAL SWITCH SETTINGS

OUTPUT

SHDN

VPPD0

VPPD1

S4

S5

S6

AVPP

1

0

0

CLOSED

OPEN

OPEN

0 V

1

0

1

OPEN

CLOSED

OPEN

AVCC†

1

1

0

OPEN

OPEN

CLOSED

VPP (12 V)

1

1

1

OPEN

OPEN

OPEN

Hi-Z

0

X

X

OPEN

OPEN

OPEN

Hi-Z

† Output depends on AVCC

AVCC

CONTROL SIGNALS

INTERNAL SWITCH SETTINGS

OUTPUT

SHDN

VCCD1

VCCD0

S1

S2

S3

AVCC

1

0

0

CLOSED

OPEN

OPEN

0 V

1

0

1

OPEN

CLOSED

OPEN

3.3 V

1

1

0

OPEN

OPEN

CLOSED

5 V

1

1

1

CLOSED

OPEN

OPEN

0 V

0

X

X

OPEN

OPEN

OPEN

Hi-Z

12-V flash memory supply

The TPS6734 is a fixed 12-V output boost converter capable of delivering 120 mA from inputs as low as

2.7 V. The device is pin-for-pin compatible with the MAX734 regulator and offers the following advantages: lower

supply current, wider operating input-voltage range, and higher output currents. As shown in Figure 1, the only

external components required are: an inductor, a Schottky rectifier, an output filter capacitor, an input filter

space when implemented with surface-mount components. An enable input is provided to shut the converter

down and reduce the supply current to 3

µA when 12 V is not needed.

The TPS6734 is a 170-kHz current-mode PWM ( pulse-width modulation) controller with an n-channel MOSFET

power switch. Gate drive for the switch is derived from the 12-V output after start-up to minimize the die area

needed to realize the 0.7-

Ω MOSFET and improve efficiency at input voltages below 5 V. Soft start is

accomplished with the addition of one small capacitor. A 1.22-V reference (pin 2) is brought out for external use.

For additional information, see the TPS6734 data sheet (SLVS127).