CAT6219

http://onsemi.com

2

Figure 1. Typical Application Circuit

VIN

BYP

EN

VOUT

GND

OFF ON

1 mF

2.3 V

to 5.5 V

2.2 mF

10 nF

CAT6219

Figure 2. Adjustable Output LDO

VIN

CAT6219

ADJ

EN

VOUT

GND

OFF ON

1 mF

2.3 V

to 5.5 V

2.2 mF

Table 1. PIN DESCRIPTIONS

Name

Function

VIN

Supply voltage input.

GND

Ground reference.

EN

Enable input (active high); a 2.5 MW pull−down

resistor is provided.

BYP

Optional bypass capacitor connection for noise

reduction and PSRR enhancing.

ADJ

Adjustable input. Feedback pin connected to

resistor divider.

VOUT

LDO Output Voltage.

TAB

To be connected to the ground plane on PCB

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.

EN is the enable control logic (active high) for the regulator

output. It has a 2.5 M

W pull−down resistor, which assures

that if EN pin is left open, the circuit is disabled.

VOUT is the LDO regulator output. A small 2.2

mF ceramic

bypass capacitor is required between the VOUT pin 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

SOT23-5 package, a continuous 500 mA output current may

turn-on the thermal protection. 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.

BYP is the reference bypass pin. An optional 0.01

mF

capacitor can be connected between BYP pin and GND to

reduce the output noise and enhance the PSRR at high

frequency.

ADJ is the adjustable input pin for the adjustable LDO. The

pin is connected to the resistor voltage divider.

Table 2. 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

206

_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.