CM2843
300mA CMOS LDO WITH EN & PG
GENERAL DESCRIPTION
The CM2843 family is positive, linear regulators featured low quiescent current (30µA typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-23-5 package is attractive for “Pocket” and “Hard Held” applications. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the “Worst” of operating conditions. An additional feature is a “Power Good” detector, which pulls low when the output is out of regulation. The CM2843 is stable with an output capacitance of 2.2µF or greater.
FEATURES
Very Low Dropout Voltage Low Current Consumption: Typ. 30µA, Max. 35µA High Accuracy Output Voltage: +/- 2.5% Guaranteed 300mA Output Input Range up to 7.0V Thermal Shutdown Current Limiting Power Good Output Function Compact Package: SOT-23-5 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
IN
1M Ω
IN PG
CM 2843 GND
OUT EN
O UT
5V
C1 1uF
C PG
* For programming delay
C2 4.7uF
2004/06/01 Rev. 1.3
Champion Microelectronic Corporation
Page 1
CM2843
300mA CMOS LDO WITH EN & PG
PIN CONFIGURATION
SOT-23-5 Top View
5 4
OUT
GND 2
VIN
1
BLOCK DIAGRAM
IN
EN 3
PG
OUT
1uA
O vercurrent Shutdown
Therm al Shutdown
EN
R1
PG
+
AMP
+
Vref = 1.176V Vref x 85%
R2
GND
2004/06/01 Rev. 1.3
Champion Microelectronic Corporation
Page 2
CM2843
300mA CMOS LDO WITH EN & PG
ORDERING INFORMATION
Part Number CM2843ACIM25 CM2843ABIM25 CM2843AIM25 CM2843GACIM25 CM2843GABIM25 CM2843GAIM25 Output Voltage 1.2V 1.3V 1.5V 1.2V 1.3V 1.5V Temperature Range -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ Package SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5
Note: For other pre-set output voltage, please contact Champion Sales office.
ABSOLUTE MAXIMUM RATINGS
Input Voltage Output Current Output Voltage …………….……………………………. +7V …………………….…… PD / (VIN - Vo) …………………… GND-0.3V to VIN+0.3V
OPERATING RATINGS
Ambient Temperature Range (TA) ……... -40℃ to +85℃ Junction Temperature Range …..…... -40℃ to +125℃
ESD Classification ………………………………………… B
THERMAL INFORMATION
Parameter Thermal Resistance (Θjc) Internal Power Dissipation (PD) (ΔT = 100℃) Maximum Junction Temperature Maximum Lead Temperature (10 Sec) SOT-23-5 SOT-23-5 Maximum 160 250 150 300 Unit ℃/W mW ℃ ℃
*With Junction sink capable of twice times ofΘjc Caution: Stress above the listed absolute rating may cause permanent damage to the device.
2004/06/01 Rev. 1.3
Champion Microelectronic Corporation
Page 3
CM2843
300mA CMOS LDO WITH EN & PG
ELECTRICAL CHARACTERISTICS
TA = +25℃; unless otherwise noted CM2843 Min. Note 1 IO = 1mA IO = 300mA, VOUT=VO(NOM)-2%, 1.2V< VO(NOM)
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