 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| CM2831 300mA CMOS LDO WITH ENABLE GENERAL DESCRIPTION The CM2831 family is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (30A 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 2.2F or greater. ! ! ! ! ! ! ! ! ! FEATURES ! Very Low Dropout Voltage Low Current Consumption: Typ. 30A, Max. 35A 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, and 3.8V 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 IN C M 2831 BYP GND OUT EN OUT 5V C1 1uF C2 1nF C3 2 .2 u F 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 1 CM2831 300mA CMOS LDO WITH ENABLE PIN CONFIGURATION SOT-23-5 Top View 5 4 VOUT GND 2 VIN 1 BLOCK DIAGRAM IN EN 3 BYP OUT 1uA Overcurrent Shutdown Thermal Shutdown EN BYP R1 + Vref = 1.176V AM P 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 Input Voltage Output Current Output Voltage .................................................. +7V ............................... PD / (VIN - Vo) mA ........................ GND-0.3V to VIN+0.3V ................................................ B OPERATING RATINGS Ambient Temperature Range (TA) ......... -40 to +85 Junction Temperature Range ........... -40 to +125 ESD Classification THERMAL INFORMATION Parameter Maximum Thermal Resistance (jc) SOT-23-5 260 Internal Power Dissipation (PD) SOT-23-5 380 (T = 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. Unit /W /W 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 3 CM2831 300mA CMOS LDO WITH ENABLE ELECTRICAL CHARACTERISTICS TA = +25; unless otherwise noted CM2831 Min. Note 1 IO = 1mA to 300mA IO = 300mA, VOUT=VO(NOM)-2%, VOUT>=2.5V IO = 300mA, VOUT=VO(NOM)-2%, VOUT<2.5V VOUT > 1.2V VOUT > 1.2V VOUT < 0.95V IO = 0mA IO = 1mA to 300mA IOUT=5mA, VIN=VOUT+1 to VOUT+2 VOUT <= 3.0V VOUT > 3.0V -0.15 -0.3 300 300 450 150 30 30 0.03 0.06 0.2 150 30 25 IO = 100mA CO=2.2F ceramic IO = 100mA Power Supply Rejection PSRR CO=2.2F ceramic CBYP=0.01F Output Voltage Noise Output Voltage Noise Shutdown Supply Current EN Input Bias Current EN Input Threshold Note 1. VIN(MIN) = VOUT + VDROPOUT 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 Hysteresis VOUT Temperature Coefficient Power Supply Rejection Symbol VIN VOUT VDROPOUT IO ILIM ISC IQ IGND REGLINE REGLOAD OTS OTH TC Test Conditions Typ. Max. 7 1.5 Unit V % mV mA mA -1.5 300 800 300 35 50 0.15 0.3 1 mA A A % % % ppm/ dB IO=1mA to 300mA f=1kHz f=10kHz f=100kHz f=1kHz f=10kHz f=100kHz CO=2.2F CO=100F CO=2.2F CO=100F 60 50 40 75 55 30 30 20 30 20 2.0 1.0 VIN/2+0.8V 0 VIN/2-0.8V 3.0 0.1 3.0 VIN Vrms Vrms A A A V V dB PSRR eN eN ISD IEH IEL VEH VEL f=10Hz to 100kHz IO = 10mA, CBYP=0F f=10Hz to 100kHz IO = 10mA, CBYP=0.01F VIN=5.0V, VOUT=0V, VEN < VEL VEN=VIN, VIN=2.6V to 7V VEN=VIN, VIN=2.6V to 7V VIN=2.6V to 7V VIN=2.6V to 7V 2002/04/12 Rev. 3 Champion Microelectronic Corporation 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 2A. This pin behaves much like an electronic switch. EXTERNAL CAPACITOR The CM2831 is stable with an output capacitor to ground of 2.2F 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 0.1F 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 c1 With Plating A c A1 A2 E1 b Base Metal Section B-B E b b1 c c1 D E 1 2 3 e e1 E1 b L L1 e e1 1 1 2 A2 A 2 A1 See Section B-B 2002/04/12 Rev. 3 Champion Microelectronic Corporation L L1 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 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 Suffix P Q R S T U V W X Y Z 2002/04/12 Rev. 3 Champion Microelectronic Corporation Page 10 CERAMIC/SURGE ABSORBER SHANGHAI,CHINA DIODES LAB HANGZHOU,CHINA CERAMIC/PZT SHINCHU,TAIWAN DC POWER LAB TAIPEI,TAIWAN |
Price & Availability of CM2831XIM25
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |