CM2831 ETC | Alldatasheet

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300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 1 GENERAL DESCRIPTION

FEATURES

The CM2831 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 SOT-23-5 package is attractive for “Pocket” and “Hand Held” applications. These rugged devices have both Thermal Shutdown, and Current Fold-back 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 CM2831 is stable with an output capacitance of 2.2µF or greater. ! Very Low Dropout Voltage ! Low Current Consumption: Typ. 30µA, Max. 35µA ! High Accuracy Output Voltage: +/- 1.5% ! Guaranteed 300mA Output ! Input Range of 2.6V to 7.0V ! Thermal Shutdown ! Current Limiting ! 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

24 Hours Technical Support--WebSIM

Champion provides customers an online circuit simulation tool called WebSIM. You could simply logon our website at www.champion-micro.com for details. TYPICAL APPLICATIONS IN OUT CM2831 BYP GND EN IN OUT 1uF 2.2uF 1nF

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 2 PIN CONFIGURATION SOT-23-5 Top View VIN VOUT EN 4BYP GND BLOCK DIAGRAM Overcurrent Shutdown Thermal Shutdown IN OUT GND Vref = 1.176V AMP BYP EN 1uA

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 3

ORDERING INFORMATION

Part Number Output Voltage Temperature Range Package CM2831AIM25 1.5V -40 ℃ ~ +85 ℃ SOT-23-5 CM2831DIM25 1.8V -40 ℃ ~ +85 ℃ SOT-23-5 CM2831EIM25 1.9V -40 ℃ ~ +85 ℃ SOT-23-5 CM2831HIM25 2.2V -40 ℃ ~ +85 ℃ SOT-23-5 CM2831KIM25 2.5V -40 ℃ ~ +85 ℃ SOT-23-5 CM2831MIM25 2.7V -40 ℃ ~ +85 ℃ SOT-23-5 CM2831NIM25 2.8V -40 ℃ ~ +85 ℃ SOT-23-5 CM2831OIM25 2.9V -40 ℃ ~ +85 ℃ SOT-23-5 CM2831PIM25 3.0V -40℃ ~ +85 ℃ SOT-23-5 CM2831SIM25 3.3V -40℃ ~ +85 ℃ SOT-23-5 CM2831UIM25 3.5V -40℃ ~ +85 ℃ SOT-23-5 CM2831VIM25 3.6V -40℃ ~ +85 ℃ SOT-23-5 CM2831XIM25 3.8V -40℃ ~ +85 ℃ SOT-23-5 Note: For other pre-set output voltage requirements, please contact Champion Sales office. ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS Output Voltage …………………… GND-0.3V to V IN+0.3V Ambient Temperature Range (TA) ……... -40 ℃ to +85 ℃ THERMAL INFORMATION Parameter Maximum Unit Thermal Resistance (Θjc) SOT-23-5 260 ℃/W Internal Power Dissipation (PD) Maximum Junction Temperature 150 ℃ Maximum Lead Temperature (10 Sec) 300 ℃ Caution: Stress above the listed absolute rating may cause permanent damage to the device.

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 4

ELECTRICAL CHARACTERISTICS

TA = +25℃; unless otherwise noted CM2831 Parameter Symbol Test Conditions Min. Typ. Max. Unit Input Voltage V IN Note 1 7 V Output Voltage Accuracy V OUT I O = 1mA to 300mA -1.5 1.5 % IO = 300mA, VOUT=VO(NOM)-2%, VOUT>=2.5V 300 Dropout Voltage V DROPOUT IO = 300mA, VOUT=VO(NOM)-2%, VOUT<2.5V 800 mV Output Current I O V OUT > 1.2V 300 mA Current Limit I LIM V OUT > 1.2V 300 450 mA Short Circuit Current I SC V OUT < 0.95V 150 300 mA Quiescent Current I Q I O = 0mA 30 35 μA Ground Pin Current I GND I O = 1mA to 300mA 30 50 μA VOUT <= 3.0V -0.15 0.03 0.15 % Line Regulation REG LINE IOUT=5mA, VIN=VOUT+1 to VOUT+2 VOUT > 3.0V -0.3 0.06 0.3 % Load Regulation REG LOAD I O=1mA to 300mA 0.2 1 % Over Temperature Shutdown OTS 150 ℃ Over Temperature Hysteresis OTH 30 ℃ VOUT Temperature Coefficient TC 25 ppm/ ℃ f=1kHz 60 f=10kHz 50 Power Supply Rejection PSRR IO = 100mA CO=2.2µF ceramic f=100kHz 40 dB f=1kHz 75 f=10kHz 55 Power Supply Rejection PSRR IO = 100mA CO=2.2µF ceramic CBYP=0.01µF f=100kHz 30 dB CO=2.2µF 30 Output Voltage Noise eN f=10Hz to 100kHz IO = 10mA, CBYP=0µF CO=100µF 20 μVrms CO=2.2µF 30 Output Voltage Noise eN f=10Hz to 100kHz IO = 10mA, CBYP=0.01µF CO=100µF 20 μVrms Shutdown Supply Current I SD V IN=5.0V, VOUT=0V, VEN < VEL 2.0 3.0 μA IEH V EN=VIN, VIN=2.6V to 7V 0.1 μA EN Input Bias Current IEL V EN=VIN, VIN=2.6V to 7V 1.0 3.0 μA VEH V IN=2.6V to 7V V IN/2+0.8V V IN V EN Input Threshold VEL V IN=2.6V to 7V 0 V IN/2-0.8V V Note 1. VIN(MIN) = VOUT + VDROPOUT

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 5 DETAILED DESCRIPTION The CM2831 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 CM2831 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The CM2831 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 0.95V. 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 CM2831 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.

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 6 TYPICAL ELECTRICAL CHARACTERISTICS

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 7

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 8

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 9 PACKAGE DIMENSION SOT-23-5 (M25) L D E A b c θ e D E e b A b c Base Metal With Plating Section B-B See Section B-B L1 L θ 123 5 4

300mA CMOS LDO W ITH E NABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 10 NUMBERING SCHEME note1: CM2831 : 300mA CMOS LDO with enable X : Suffix for voltage output (note 2) Y : Suffix for Temperature Range (note 3) Z : Suffix for Package Type (note 4) note 2: see CMOS LDO Voltage Suffix Table note 3: Y= I : -40℃~+85℃ (only I grade support for all CMOS LDOs) note 4: Z is single alphabet with or without digits M25 : SOT-25 (TR only) CMOS LDO Voltage Suffix Table Output Voltage Suffix Output Voltage Suffix 1.5V A 3.0V P 1.6V B 3.1V Q 1.7V C 3.2V R 1.8V D 3.3V S 1.9V E 3.4V T 2.0V F 3.5V U 2.1V G 3.6V V 2.2V H 3.7V W 2.3V I 3.8V X 2.4V J 3.9V Y 2.5V K 4.0V Z 2.6V L 2.7V M 2.8V N 2.9V O

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