cat6221 Catalyst Semiconductor, cat6221 Datasheet - Page 2

• Manufacturer Part Number: cat6221
• Description: 300ma Cmos Dual Ldo Regulator
• Manufacturer: Catalyst Semiconductor

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.
CAT6221
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.
EN1 & 2 are the enable control logic (active high) for the
regulator outputs.
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
Typical application circuit with external components are 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. MD-10001 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 (TSOT23), θ
IN
EN
IN
EN
1
2
3
4
5
6
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
, V
VOUT2 LDO Output Voltage 2.
VOUT1 LDO Output Voltage 1.
OUT
GND
EN1
EN2
VIN
Enable input (active high) for VOUT1.
Supply voltage input.
Enable input (active high) for VOUT2.
Ground reference.
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
Range
Rating
BLOCK DIAGRAM
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.
V
+150
235
260
IN
3
Figure 2. CAT6221 Functional Block Diagram
IN
IN
+0.3
EN1
EN2
VIN
(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
LDO1
LDO2
JA
. Exceeding the maximum
GND
Shutdown
Shutdown
©
Switch
Switch
EN1
EN2
Catalyst Semiconductor, Inc.
VOUT1
VOUT2
V
V
OUT1
OUT2