CAT6221

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2

Figure 1. Typical Application Circuit

Figure 2. CAT6221 Functional Block Diagram

OFF

VIN

1 mF

2.3 V to 5.5 V

VOUT1

1 mF

1 mF

VOUT2

GND

CAT6221

VIN

VOUT1

ON

VOUT2

EN1

EN2

EN1

EN2

EN1

VIN

VOUT1

Shutdown

Switch

LDO1

Reference

EN2

GND

VOUT2

Shutdown

Switch

LDO2

OFF ON

Pin Function

VIN is the supply pin for the LDO. A small 1

mF ceramic

near the device. When using longer connections to the power

operating input voltage range is from 2.3 V to 5.5 V.

EN1 & 2 are the enable control logic (active high) for the

regulator outputs.

VOUT1 & 2 are the LDO regulator outputs. A small 1

mF

ceramic bypass capacitor is required between the VOUT

pins and ground. For better transient response, its value can

be increased to 4.7

mF.

The capacitor should be located near the device. For the

TSOT23 6−lead package, a continuous 300 mA output

current for both LDOs may turn−on the thermal protection.

On each output, a 250

W internal shutdown switch

discharges the output capacitor in the no−load condition.

GND is the ground reference for the LDO. The pin must be

connected to the ground plane on the PCB.

Table 1. ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Unit

0 to 6.5

V

V

+150

_C

Internally Limited (Note 1)

mW

−65 to +150

_C

Lead Temperature (soldering, 5 sec.)

260

_C

ESD Rating (Human Body Model)

3

kV

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

Parameter

Range

Unit

2.3 to 5.5

V

V

−40 to +125

_C

235

_C/W

NOTE: Typical application circuit with external components is shown above.

power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.

2. The device is not guaranteed to work outside its operating rating.