CM2836/B/C
300mA L
OW
E
SR
CMOS LDO W
ITH
E
NABLE
GENERAL DESCRIPTION
The CM2836/B/C 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, making them ideal for battery applications.
EN input connected to CMOS has low bias current. The
space-saving SC70 package is attractive for “Pocket” and
“Hand Held” applications.
These rugged devices have both Thermal Shutdown, and
Current limit to prevent device failure under the “Worst” of
operating conditions.
In application requiring a low noise, regulated supply, place a
1000pF capacitor between Bypass and Ground.
The CM2836/B/C is stable with a Low ESR output
capacitance of 1.0μF or greater.
FEATURES
Very Low Dropout Voltage
Low Current Consumption: Typ. 30μA, Max. 35μA
More Options Output Voltage
High Accuracy Output Voltage: +/- 2%
Guaranteed 300mA Output
Input Range up to 7.0V
Thermal Shutdown
Current Limiting
Stability with Low ESR Capacitors
Compact Package: SOT-23-3 / SOT-23-5
/ SOT-89 / SC70-5
Factory Pre-set Output Voltages
Low Temperature Coefficient
APPLICATIONS
Battery-powered devices
Personal communication devices
Home electric/electronic appliances
PC peripherals
TYPICAL APPLICATIONS
2007/09/03 Rev1.2
Champion Microelectronic Corporation
Page 1
CM2836/B/C
300mA L
OW
E
SR
CMOS LDO W
ITH
E
NABLE
PIN CONFIGURATION
SOT-23-3
Top View
3
SOT-23-5
Top View
Pin 1
Pin 2
Pin 3
1
2
2836
GND
VOUT
VIN
2836B
VIN
VOUT
GND
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
2836
VIN
GND
EN
BYP
VOUT
SC70-5
Top View
SOT-89
Top View
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
CM2836
VIN
GND
EN
BYP
VOUT
2836B
NC
GND
NC
VIN
VOUT
2836C
NC
VIN
NC
GND
VOUT
Pin 1
Pin 2
Pin 3
1
2
3
2836
GND
VIN
VOUT
BLOCK DIAGRAM
IN
OUT
1uA
O v e rc u rre n t
S h u td o w n
T h e rm a l
S h u td o w n
EN
BYP
R1
-
+
Vref = 1.176V
AMP
R2
GND
2007/09/03 Rev1.2
Champion Microelectronic Corporation
Page 2
CM2836/B/C
300mA L
OW
E
SR
CMOS LDO W
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NABLE
ORDERING INFORMATION
Example:
Part Number
CM2836/BGSIM23
CM2836GSIM25
CM2836GSIM89
CM2836/B/CGSIM75
Output Voltage
3.3V
3.3V
3.3V
3.3V
Temperature Range
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
Package
SOT-23-3
SOT-23-5
SOT-89
SC70-5
Note: For other pre-set output voltage requirements, please contact Champion Sales office.
Please refer to page 10
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Output Current
Output Voltage
…………….……..…………………………. +7V
…………………….……
P
D
/ (V
IN
- Vo) mA
OPERATING RATINGS
Ambient Temperature Range (T
A
) …..…..... -40℃ to +85℃
Junction Temperature Range
……...…... -40℃ to +150℃
………………….…… GND-0.3V to V
IN
+0.3V
ESD Classification …………………………………………… B
THERMAL INFORMATION
Parameter
Thermal Resistance (Θ
jc
)
Thermal Resistance (Θ
jc
)
Thermal Resistance (Θ
jc
)
Package
SOT-23
SOT-23-5
SOT-89
SC70-5
SOT-23
Internal Power Dissipation (P
D
)
(ΔT = 100℃)
SOT-23-5
SOT-89
SC70-5
Maximum Junction Temperature
Maximum Lead Temperature (10 Sec)
Maximum
160
100
250
250
400
200
150
300
Unit
℃/W
℃/W
℃/W
mW
mW
mW
℃
℃
Caution: Stress above the listed absolute rating may cause permanent damage to the device.
2007/09/03 Rev1.2
Champion Microelectronic Corporation
Page 3
CM2836/B/C
300mA L
OW
E
SR
CMOS LDO W
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E
NABLE
ELECTRICAL CHARACTERISTICS
T
A
= +25℃; unless otherwise noted
CM2836/B/C
Parameter
Input Voltage
Output Voltage Accuracy
Symbol
V
IN
V
OUT
I
O
= 1mA to 300mA
1.2V<V
O(NOM)
≤
2.0V
Dropout Voltage
V
DROPOUT
I
O
= 300mA,
V
OUT
=V
O(NOM)
-2%,
2.0V<V
O(NOM)
≤
2.5V
2.5V<V
O(NOM)
Output Current
Current Limit
Short Circuit Current
Quiescent Current
Ground Pin Current
Line Regulation
Load Regulation
Over Temperature Shutdown
Over Temperature Hysteresis
V
OUT
Temperature Coefficient
Power Supply Rejection
(Sot23-3/Sot-89)
I
O
I
LIM
I
SC
I
Q
I
GND
REG
LINE
REG
LOAD
OTS
OTH
TC
I
O
= 100mA
C
O
=2.2μF ceramic
I
O
= 100mA
PSRR
C
O
=2.2μF ceramic
C
BYP
=0.01μF
eN
f=10Hz to 100kHz
I
O
= 10mA, C
BYP
=0μF
f=10Hz to 100kHz
I
O
= 10mA, C
BYP
=0.01μF
f=1kHz
f=10kHz
f=100kHz
f=1kHz
f=10kHz
f=100kHz
C
O
=2.2μF
C
O
=100μF
C
O
=2.2μF
C
O
=100μF
V
OUT
> 1.2V
V
OUT
> 1.2V
Vo<0.8V
I
O
= 0mA
I
O
= 1mA to 300mA
I
OUT
=5mA, V
IN
=V
OUT
+1 to V
OUT
+2
I
O
=1mA to 300mA
-0.1
300
300
450
300
30
30
0.02
0.2
150
30
40
60
50
40
65
45
25
30
μVrms
20
30
μVrms
20
0.2
2.0
0.1
0.2
2
0
2.0
V
IN
0.4
μA
μA
μA
V
V
dB
dB
500
35
50
0.1
1
Test Conditions
Min.
Note 1
-2
Typ.
Max.
7
2
1300
400
300
mA
mA
mA
μA
μA
%
%
℃
℃
ppm/℃
mV
V
%
Unit
PSRR
Power Supply Rejection
(Sot23-5/SC70-5)
Output Voltage Noise
(Sot23-3/Sot-89)
Output Voltage Noise
(Sot23-5/SC70-5)
Shutdown Supply Current
EN Input Bias Current
eN
I
SD
I
EH
I
EL
V
EH
V
EL
V
IN
=5.0V, V
OUT
=0V, V
EN
< V
EL
V
EN
=V
IN
, V
IN
=2.6V to 7V
V
EN
=0, V
IN
=2.6V to 7V
V
IN
=2.6V to 7V
V
IN
=2.6V to 7V
EN Input Threshold
Note 1.
V
IN(MIN)
= V
OUT
+ V
DROPOUT
Note 2.
The input voltage should be better applied before a current source load is applied to avoid start up problem.
2007/09/03 Rev1.2
Champion Microelectronic Corporation
Page 4
CM2836/B/C
300mA L
OW
E
SR
CMOS LDO W
ITH
E
NABLE
DETAILED DESCRIPTION
The CM2836/B/C family of CMOS regulators contains a PMOS pass transistor, voltage reference, error amplifier, over-current
protection, output short protection, and thermal shutdown.
The P-channel pass transistor receives data from the error amplifier, over-current protection, output short 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 CM2836/B/C switches from voltage mode to current mode when the load exceeds the rated output current. This prevents
over-stress.
ENABLE
The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shut off, and all internal circuits are
powered down. In this state, the quiescent current is less than 2μA. This pin behaves much like an electronic switch.
EXTERNAL CAPACITOR
The CM2836/B/C is stable with a Low ESR output capacitor to ground of 1.0μF or greater. It can keep stable even with higher
ESR capacitors. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should
be larger than 1μF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground
termination is desirable.
2007/09/03 Rev1.2
Champion Microelectronic Corporation
Page 5
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