CAT6221

Doc. No. MD-10001 Rev. A

2

Characteristics subject to change without notice

EN1

EN2

EN1

VIN

VOUT1

Shutdown

Switch

LDO1

Reference

EN2

GND

VOUT2

Shutdown

Switch

LDO2

PIN DESCRIPTIONS

Pin # Name Function

1

EN1

Enable input (active high) for VOUT1.

2

VIN

Supply voltage input.

3

EN2

Enable input (active high) for VOUT2.

4

VOUT2 LDO Output Voltage 2.

5

GND

Ground reference.

6

VOUT1 LDO Output Voltage 1.

PIN FUNCTION

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

pin and ground near the device. When using longer

increased without limit. The operating input voltage

range is from 2.3V to 5.5V.

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

regulator outputs.

BLOCK DIAGRAM

Figure 2. CAT6221 Functional Block Diagram

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

ceramic bypass capacitor is required between the

VOUT pins and ground. For better transient response,

its value can be increased to 4.7μF.

The capacitor should be located near the device. For

the TSOT23 6-lead package, a continuous 300mA

output current for both LDOs may turn-on the thermal

protection.

On each output, a 250Ω 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.

ABSOLUTE MAXIMUM RATINGS(1)

Parameter

Rating

Unit

0 to 6.5

V

V

+150

°C

Internally Limited

(2)

mW

-65 to +150

°C

Lead Temperature (soldering, 5 sec.)

260

°C

ESD Rating (Human Body Model)

3

kV

RECOMMENDED OPERATING CONDITIONS (3)

Parameter

Range

Unit

2.3 to 5.5

V

V

-40 to +125

°C

Package Thermal Resistance (TSOT23),

235

°C/W

Typical application circuit with external components are shown on page 1.

Notes:

(1) Exceeding maximum rating may damage the device.

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

(3) The device is not guaranteed to work outside its operating rating.