CM2862
600mA CMOS LDO
GENERAL DESCRIPTION
The CM2862 family is a positive voltage linear regulator
developed utilizing CMOS technology featured low quiescent
current (30µA typ.), low dropout voltage, and high output
voltage accuracy. Built-in low on-resistance transistor provides
low dropout voltage and large output current. A 2.2µF or
greater can be used as an output capacitor.
The SOT-89 packages are attractive for “Pocket” and “Hand
Held” applications.
These robust devices are designed to prevent device failure
under the worst operation condition with both Thermal
Shutdown and Current Fold-back.
FEATURES
Very Low Dropout Voltage
Low Current Consumption: Typ. 30µA, Max. 35µA
High Accuracy Output Voltage: +/- 1.5%
Guaranteed 600mA Output
Thermal Shutdown
Current Limiting
Compact Package: SOT-89
Factory Pre-set Output Voltages
Short Circuit Current Fold-Back
Low Temperature Coefficient
APPLICATIONS
Battery-powered devices
Personal communication devices
Home electric/electronic appliances
PC peripherals
TYPICAL APPLICATIONS
CM2862
IN
IN
GND
OUT
OUT
VIN
C1
1uF
C2
2.2uF
2003/12/05
Rev. 1.0
Champion Microelectronic Corporation
Page 1
CM2862
600mA CMOS LDO
PIN CONFIGURATION
SOT-89
Top View
2862
VOUT
GND
VIN
Pin 1
Pin 2
Pin 3
1
2
3
BLOCK DIAGRAM
IN
OUT
Overcurrent
Shutdown
Thermal
Shutdown
R1
-
+
Vref = 1.176V
AM P
R2
GND
ORDERING INFORMATION
Part Number
CM2862KIM89
CM2862SIM89
Output Voltage
2.5V
3.3V
Temperature Range
-40℃ ~ +85℃
-40℃ ~ +85℃
Package
SOT-89
SOT-89
Note: For other pre-set output voltage, please contact Champion Sales office.
2003/12/05
Rev. 1.0
Champion Microelectronic Corporation
Page 2
CM2862
600mA CMOS LDO
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Output Current
…………….……………………………. +7V
…………………….………………….
1A
OPERATING RATINGS
Supply Voltage ………………………………. 4.5V to 5.5V
Ambient Temperature Range (T
A
) ……... -40℃ to +85℃
Junction Temperature Range …..…... -40℃ to +125℃
Output Voltage …………………… GND-0.3V to V
IN
+0.3V
ESD Classification ………………………………………… B
THERMAL INFORMATION
Parameter
Thermal Resistance (Θ
jc
)
Thermal Resistance (Θ
ja
)
Internal Power Dissipation (P
D
) (ΔT = 100℃, No Heatsink)
Maximum Junction Temperature
Maximum Lead Temperature (10 Sec)
SOT-89
SOT-89
SOT-89
Maximum
100
180
400
150
300
Unit
℃/W
℃/W
mW
℃
℃
ELECTRICAL CHARACTERISTICS
T
A
= +25℃; V
IN
= V
IN(MIN)
unless otherwise noted
CM2862
Min.
Note 1
I
O
= 1mA
I
O
= 600mA,
V
OUT
=V
O(NOM)
-1.5%,
1.5V<V
O(NOM)
<=2.0V
2.0V<V
O(NOM)
<=2.8V
2.8V<V
O(NOM)
<3.8V
600
600
1000
250
30
30
0.02
0.2
150
30
30
I
O
= 100mA
C
O
=2.2µF ceramic
f=10Hz to 100kHz
I
O
= 10mA, C
VBG
=0µF
f=1kHz
f=10kHz
f=100kHz
C
O
=2.2µF
C
O
=100µF
50
20
15
30
20
μVrms
dB
V
OUT
<= 2.0V
V
OUT
> 2.0V
50
50
0.15
0.1
1
-1.5
Typ.
Max.
7
1.5
1000
800
600
Parameter
Input Voltage
Output Voltage Accuracy
Dropout Voltage
Output Current
Current Limit
Short Circuit Current
Quiescent Current
Ground Pin Current
Line Regulation
Load Regulation
Over Temperature Shutdown
Over Temperature Hystersis
V
OUT
Temperature Coefficient
Power Supply Rejection
Symbol
V
IN
V
OUT
V
DROPOUT
I
O
I
LIM
I
SC
I
Q
I
GND
REG
LINE
REG
LOAD
OTS
OTH
TC
PSRR
Test Conditions
Unit
V
%
mV
mV
mA
mA
mA
μA
μA
%
%
%
℃
℃
ppm/℃
V
OUT
> 1.2V
V
OUT
> 1.2V, V
IN
= V
IN(MIN)
V
OUT
< 0.8V
I
O
= 0mA
I
O
= 1mA to 600mA
I
OUT
=5mA, V
IN
=V
OUT
+1 to
V
OUT
+2
I
O
=1mA to 600mA
Output Voltage Noise
eN
Note 1.
V
IN(MIN)
= V
OUT
+ V
DROPOUT
Note 2.
As V
IN
is larger than V
IN(MIN)
, the Current Limit and output short current Spec value will increase
2003/12/05
Rev. 1.0
Champion Microelectronic Corporation
Page 3
CM2862
600mA CMOS LDO
DETAILED DESCRIPTION
The CM2862 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 600mA.
During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120℃.
The CM2862 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents
over-stress. The CM2862 also incorporates current fold-back to reduce power dissipation when the output is short-circuited. This
feature becomes active when the output drops below 0.8V, and reduces the current flow by 65%. Full current is restored when
the voltage exceeds 0.8V.
EXTERNAL CAPACITOR
The CM2862 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.
2003/12/05
Rev. 1.0
Champion Microelectronic Corporation
Page 4
CM2862
600mA CMOS LDO
TYPICAL ELECTRICAL CHARACTERISTICS
2003/12/05
Rev. 1.0
Champion Microelectronic Corporation
Page 5
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