CM2830 Champion Microelectronic Corp., CM2830 Datasheet - Page 8

• Manufacturer Part Number: CM2830
• Description: 300mA CMOS LDO
• Manufacturer: Champion Microelectronic Corp.

ELECTRICAL CHARACTERISTICS
T
Over Temperature Hysteresis
Note 1. V
DETAILED DESCRIPTION
The CM2830/CM2830A family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier,
over-current protection, thermal shutdown, and short circuit protection.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, short output protection, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current
and Thermal shutdown circuits become active when the junction temperature exceeds 150℃, or the current exceeds 300mA.
During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120℃.
The CM2830/CM2830A switches from voltage mode to current mode when the load exceeds the rated output current. This
prevents over-stress. The CM2830 also incorporates current fold-back to reduce power dissipation when the output is
short-circuited. This feature becomes active when the output drops below 1.05V, and reduces the current flow by 65%. Full
current is restored when the voltage exceeds 1.05V.
EXTERNAL CAPACITOR
The CM2830/2830A is stable with an output capacitor to ground of 2.2µF or greater. It can keep stable even with higher or poor
ESR capacitors. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should
be larger than 0.1µF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground
termination is desirable.
2002/01/28
Over Temperature Shutdown
Output Voltage Temp. Coeff.
A
Output Voltage Accuracy
Power Supply Rejection
= +25℃; unless otherwise noted
Short Circuit Current
Ground Pin Current
Quiescent Current
Dropout Voltage
Load Regulation
Line Regulation
Output Current
Input Voltage
Output Noise
Current Limit
IN(MIN)
Parameter
Preliminary
= V
OUT
+ 0.3V
I
OUT
I
OUT
C
I
Rev. 2
F=10Hz to 100kHz, C
I
o
O
o
=5mA, V
=300mA, V
=5mA, V
=2.2µF ceramic
=300mA, V
I
O
= 100mA
IN
IN
=V
I
I = 1mA to 300mA
=V
o
I
Test Conditions
OUT
V
o
OUT
=1mA to 300mA
= 1mA to 300mA
IN
OUT
V
OUT
V
=5V, No Load
=V
V
OUT
=V
OUT
OUT
+1 to V
Champion Microelectronic Corporation
+1 to V
OUT
OUT
< 1.05V
> 1.2V
>1.2V
-2.0%, VOUT<=2.5V
O
-2.0%, VOUT>2.5V
=2.2µF, I
OUT
OUT
+2, V
+2, V
f=100KHz
f=10KHz
f=1KHz
O
OUT
OUT
= 10mA
<= 3.0V
> 3.0V
Note 1
-0.15
Min.
-1.5
300
300
-0.3
CM2830/CM2830A
CM2830/CM2830A
300mA CMOS LDO
Typ.
0.03
0.06
300
800
150
450
150
0.2
30
30
60
50
40
30
30
25
Max.
0.15
300
1.5
0.3
35
35
7
1
Page 7
μVrms
ppm/℃
Unit
μA
μA
mV
mV
mA
mA
mA
dB
℃
℃
%
%
%
V