CAT6219 CATALYST [Catalyst Semiconductor], CAT6219 Datasheet - Page 2

• Manufacturer Part Number: CAT6219
• Description: 500mA CMOS LDO Regulator
• Manufacturer: CATALYST [Catalyst Semiconductor]

output. It has a 2.5MΩ pull-down resistor, which
assures that if EN pin is left open, the circuit is disabled.
VOUT is the LDO regulator output. A small 2.2μF
ceramic bypass capacitor is required between the
VOUT pin and ground. For better transient response,
its value can be increased to 4.7μF.
CAT6219
PIN DESCRIPTIONS
PIN FUNCTION
VIN is the supply pin for the LDO. A small 1μF
ceramic bypass capacitor is required between the V
pin and ground near the device. When using longer
connections to the power supply, C
increased without limit. The operating input voltage
range is from 2.3V to 5.5V.
EN is the enable control logic (active high) for the regulator
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
Typical application circuit with external components is shown on page 1.
Notes:
(1) Exceeding maximum rating may damage the device.
(2) The maximum allowable power dissipation at any T
(3) The device is not guaranteed to work outside its operating rating.
Doc. No. 10009 Rev. A
Pin # Name Function
Parameter
V
V
Junction Temperature, T
Power Dissipation, P
Storage Temperature Range, T
Lead Temperature (soldering, 5 sec.)
ESD Rating (Human Body Model)
Parameter
V
V
Junction Temperature Range, T
Package Thermal Resistance (SOT23-5), θ
IN
EN
IN
EN
1
2
3
4
5
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
, V
VOUT LDO Output Voltage.
OUT
GND
BYP
VIN
EN
Supply voltage input.
Ground reference.
Enable input (active high); a 2.5MΩ
pull-down resistor is provided.
Optional bypass capacitor connection
for noise reduction and PSRR
enhancing.
D
J
S
J
IN
value can be
(1)
JA
A
(ambient temperature) is P
Internally Limited
IN
-0.3 to V
2
-40 to +125
-65 to +150
(3)
2.3 to 5.5
0 to 6.5
0 to V
V
Range
Rating
BLOCK DIAGRAM
The capacitor should be located near the device. For
the SOT23-5 package, a continuous 500mA output
current may turn-on the thermal protection. 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.
BYP is the reference bypass pin. An optional 0.01μF
capacitor can be connected between BYP pin and
GND to reduce the output noise and enhance the
PSRR at high frequency.
+150
IN
235
260
3
Figure 2. CAT6219 Functional Block Diagram
IN
IN
BYP
+0.3
VIN
EN
(2)
Dmax
Reference
= (T
Jmax
°C/W
Unit
Unit
mW
°C
°C
°C
°C
kV
V
V
V
V
– T
Characteristics subject to change without notice
A
) / θ
JA
LDO
©
. Exceeding the maximum
2007 Catalyst Semiconductor, Inc.
GND
Shutdown
Switch
EN
VOUT
V
OUT