CM2831 300mA CMOS LDO WITH ENABLE GENERAL DESCRIPTION FEATURES The CM2831 family is a positive voltage linear regulator ! Very Low Dropout Voltage developed utilizing CMOS technology featured low quiescent ! Low Current Consumption: Typ. 30µA, Max. 35µA current (30µA typ.), low dropout voltage, and high output ! Output Voltage: 1.5V, 1.8V, 1.9V, 2.2V, 2.5V, 2.7V, 2.8V, EN input connected to CMOS has low bias current. The ! High Accuracy Output Voltage: +/- 1.5% space-saving SOT-23-5 package is attractive for “Pocket” and ! Guaranteed 300mA Output “Hand Held” applications. ! Input Range of 2.6V to 7.0V 2.9V, 3.0V, 3.3V, 3.5V, 3.6V, and 3.8V voltage accuracy, making them ideal for battery applications. ! Thermal Shutdown These rugged devices have both Thermal Shutdown, and ! Current Limiting Current Fold-back to prevent device failure under the “Worst” ! Compact Package: SOT-23-5 of operating conditions. ! Factory Pre-set Output Voltages ! Short Circuit Current Fold-Back ! Low Temperature Coefficient 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. APPLICATIONS 24 Hours Technical Support--WebSIM ! Battery-powered devices ! Champion provides customers an online circuit simulation tool Personal communication devices ! Home electric/electronic appliances ! PC peripherals called WebSIM. You could simply logon our website at www.champion-micro.com for details. TYPICAL APPLICATIONS IN IN C M 2831 BYP GND 5V 2002/04/12 Rev. 3 C1 1uF OUT OUT EN C2 1nF Champion Microelectronic Corporation C3 2 .2 u F Page 1 CM2831 300mA CMOS LDO WITH ENABLE PIN CONFIGURATION SOT-23-5 Top View 4 VIN GND EN BYP VOUT 5 1 2 3 BLOCK DIAGRAM IN OUT Overcurrent Shutdown 1uA R1 Thermal Shutdown EN - BYP AM P + Vref = 1.176V R2 GND 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 2 CM2831 300mA CMOS LDO WITH ENABLE ORDERING INFORMATION Part Number CM2831AIM25 CM2831DIM25 CM2831EIM25 CM2831HIM25 CM2831KIM25 CM2831MIM25 CM2831NIM25 CM2831OIM25 CM2831PIM25 CM2831SIM25 CM2831UIM25 CM2831VIM25 CM2831XIM25 Output Voltage 1.5V 1.8V 1.9V 2.2V 2.5V 2.7V 2.8V 2.9V 3.0V 3.3V 3.5V 3.6V 3.8V Temperature Range -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -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 SOT-23-5 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 requirements, please contact Champion Sales office. ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS Input Voltage Ambient Temperature Range (TA) ……... -40℃ to +85℃ …………….……………………………. +7V PD / (VIN - Vo) mA Output Current …………………….…… Output Voltage …………………… GND-0.3V to VIN+0.3V ESD Classification Junction Temperature Range …..…... -40℃ to +125℃ ………………………………………… B THERMAL INFORMATION Parameter Maximum Thermal Resistance (Θjc) SOT-23-5 260 Internal Power Dissipation (PD) SOT-23-5 380 (ΔT = 100℃) Maximum Junction Temperature 150 Maximum Lead Temperature (10 Sec) 300 Caution: Stress above the listed absolute rating may cause permanent damage to the device. 2002/04/12 Rev. 3 Champion Microelectronic Corporation Unit ℃/W ℃/W ℃ ℃ Page 3 CM2831 300mA CMOS LDO WITH ENABLE ELECTRICAL CHARACTERISTICS TA = +25℃; unless otherwise noted Parameter Symbol Input Voltage VIN Output Voltage Accuracy VOUT Dropout Voltage VDROPOUT CM2831 Test Conditions Min. Typ. Note 1 IO = 1mA to 300mA -1.5 IO = 300mA, VOUT=VO(NOM)-2%, VOUT>=2.5V 300 IO = 300mA, VOUT=VO(NOM)-2%, VOUT<2.5V 800 Max. Unit 7 V 1.5 % mV Output Current IO VOUT > 1.2V 300 Current Limit ILIM VOUT > 1.2V 300 mA Short Circuit Current ISC VOUT < 0.95V 150 300 mA Quiescent Current IQ IO = 0mA 30 35 μA Ground Pin Current IGND IO = 1mA to 300mA 30 50 μA Line Regulation REGLINE Load Regulation REGLOAD 450 mA IOUT=5mA, VIN=VOUT+1 to VOUT <= 3.0V -0.15 0.03 0.15 % VOUT+2 VOUT > 3.0V -0.3 0.06 0.3 % 0.2 1 Over Temperature Shutdown OTS 150 % ℃ Over Temperature Hysteresis OTH 30 ℃ VOUT Temperature Coefficient TC 25 ppm/℃ Power Supply Rejection PSRR IO=1mA to 300mA IO = 100mA CO=2.2µF ceramic PSRR Output Voltage Noise eN Output Voltage Noise eN Shutdown Supply Current EN Input Bias Current EN Input Threshold 60 f=10kHz 50 f=100kHz 40 f=1kHz 75 CO=2.2µF ceramic f=10kHz 55 CBYP=0.01µF f=100kHz 30 f=10Hz to 100kHz CO=2.2µF 30 IO = 10mA, CBYP=0µF CO=100µF 20 f=10Hz to 100kHz CO=2.2µF 30 IO = 10mA, CBYP=0.01µF CO=100µF 20 IO = 100mA Power Supply Rejection f=1kHz ISD VIN=5.0V, VOUT=0V, VEN < VEL IEH VEN=VIN, VIN=2.6V to 7V IEL VEN=VIN, VIN=2.6V to 7V VEH VIN=2.6V to 7V VEL VIN=2.6V to 7V dB μVrms μVrms 3.0 μA 0.1 μA 1.0 3.0 μA VIN/2+0.8V VIN 2.0 0 dB VIN/2-0.8V Note 1. VIN(MIN) = VOUT + VDROPOUT 2002/04/12 Rev. 3 Champion Microelectronic Corporation V V Page 4 CM2831 300mA CMOS LDO WITH ENABLE 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. 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 5 CM2831 300mA CMOS LDO WITH ENABLE TYPICAL ELECTRICAL CHARACTERISTICS 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 6 CM2831 300mA CMOS LDO WITH ENABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 7 CM2831 300mA CMOS LDO WITH ENABLE 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 8 CM2831 300mA CMOS LDO WITH ENABLE PACKAGE DIMENSION SOT-23-5 (M25) D 5 4 b1 With Plating c c1 A A1 E E1 A2 b b Base Metal b1 c Section B-B c1 D E 1 2 3 e E1 b L e1 L1 e θ1 e1 θ θ1 θ A2 A θ2 θ2 A1 L 2002/04/12 Rev. 3 See Section B-B L1 Champion Microelectronic Corporation Page 9 CM2831 300mA CMOS LDO WITH ENABLE NUMBERING SCHEME Ordering Number: CM2831XYZ (note1) 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 CM2831 will provide options of A(1.5V), D (1.8V), E(1.9V),, H(2.2V), K(2.5V), M(2.7V), N(2.8V), O(2.9V), P(3.0V), S(3.3V), U(3.5V), V(3.6V), X(3.8V) 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 1.5V 1.6V 1.7V 1.8V 1.9V 2.0V 2.1V 2.2V 2.3V 2.4V 2.5V 2.6V 2.7V 2.8V 2.9V 2002/04/12 Rev. 3 Suffix A B C D E F G H I J K L M N O Output Voltage 3.0V 3.1V 3.2V 3.3V 3.4V 3.5V 3.6V 3.7V 3.8V 3.9V 4.0V Champion Microelectronic Corporation Suffix P Q R S T U V W X Y Z Page 10 CERAMIC/SURGE ABSORBER SHANGHAI,CHINA DIODES LAB HANGZHOU,CHINA CERAMIC/PZT SHINCHU,TAIWAN DC POWER LAB TAIPEI,TAIWAN