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| CM2838 300mA LOW ESR CMOS LDO WITH ENABLE GENERAL DESCRIPTION The CM2838 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 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 CM2838 is stable with a Low ESR output capacitance of 1.0F or greater. FEATURES Very Low Dropout Voltage Low Current Consumption: Typ. 30A, Max. 35A Output Voltage: 1.8V, 2.5V, 2.8V, 3.0V, and 3.3V High Accuracy Output Voltage: +/- 1.5% Guaranteed 300mA Output Input Range up to 7.0V Thermal Shutdown Current Limiting Stability with Low ESR Capacitors Compact Package: SOT-23-5 Factory Pre-set Output Voltages Low Temperature Coefficient APPLICATIONS Battery-powered devices Personal communication devices Home electric/electronic appliances PC peripherals TYPICAL APPLICATIONS IN IN C M 2838 BYP GND OUT EN OUT 5V C1 1uF C2 1nF C3 1.0uF 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 1 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE PIN CONFIGURATION SOT-23-5 Top View 5 4 VOUT GND 2 VIN 1 BLOCK DIAGRAM IN EN 3 BYP O UT 1uA Overcurrent Shutdown Thermal Shutdown EN R1 BYP + Vref = 1.176V AMP R2 G ND 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 2 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE ORDERING INFORMATION Part Number CM2838DIM25 CM2838KIM25 CM2838NIM25 CM2838PIM25 CM2838SIM25 CM2838GDIM25 CM2838GKIM25 CM2838GNIM25 CM2838GPIM25 CM2838GSIM25 Output Voltage 1.8V 2.5V 2.8V 3.0V 3.3V 1.8V 2.5V 2.8V 3.0V 3.3V Temperature Range -40J ~ +85J -40J ~ +85J -40J ~ +85J -40J ~ +85J -40J ~ +85J -40J ~ +85J -40J ~ +85J -40J ~ +85J -40J ~ +85J -40J ~ +85J 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 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 OPERATING RATINGS Ambient Temperature Range (TA) ......... -40J Junction Temperature Range ........... -40J to +85J to +125J ESD Classification ................................................ B THERMAL INFORMATION Parameter Maximum Thermal Resistance (K jc) SOT-23-5 160 Internal Power Dissipation (PD) SOT-23-5 250 (G T = 100J ) 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 J /W mW J J 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 3 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE ELECTRICAL CHARACTERISTICS TA = +25J ; unless otherwise noted CM2838 Min. Note 1 IO = 1mA to 300mA IO = 300mA, VOUT=VO(NOM)-1.5%, 1.2V Parameter Input Voltage Output Voltage Accuracy Dropout Voltage Output Current Current Limit 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 IQ IGND REGLINE REGLOAD OTS OTH TC Test Conditions Typ. Max. 7 1.5 1300 800 300 Unit V % mV mA mA -1.5 2.0V 35 50 0.1 1 g A g A % % J J ppm/J dB 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 2.0 2 0 3.0 0.1 3.0 VIN 0.4 g Vrms g Vrms g A g A g 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=0, VIN=2.6V to 7V VIN=2.6V to 7V VIN=2.6V to 7V 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 4 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE DETAILED DESCRIPTION The CM2838 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over-current 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 150J , or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120J . The CM2838 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 2A. This pin behaves much like an electronic switch. EXTERNAL CAPACITOR The CM2838 is stable with a Low ESR output capacitor to ground of 1.0F 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 0.1F to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A "quiet" ground termination is desirable. 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 5 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE TYPICAL CHARACTERISTICS 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 6 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 7 CM2838 300mA LOW ESR 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 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation L L1 Page 8 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE NUMBERING SCHEME Ordering Number: CM2838XYZ (note1) Ordering Number: CM2838GXYZ (note2) note1: CM2838: 300mA CMOS LDO with enable X : Suffix for voltage output (note 3) Y : Suffix for Temperature Range (note 4) Z : Suffix for Package Type (note 5) note2: CM2838: 300mA CMOS LDO with enable G : Suffix for Pb Free Product X : Suffix for voltage output (note 3) Y : Suffix for Temperature Range (note 4) Z : Suffix for Package Type (note 5) note 3: see CMOS LDO Voltage Suffix Table CM2838 will provide options of D(1.8V), K(2.5V), N(2.8V), P(3.0V), S(3.3V) note 4: Y= I : -40J ~+85J (only I grade support for all CMOS LDOs) note 5: 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 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 9 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE IMPORTANT NOTICE Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. CMC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of CMC products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. HsinChu Headquarter 5F, No. 11, Park Avenue II, Science-Based Industrial Park, HsinChu City, Taiwan T E L : +886-3-567 9979 F A X : +886-3-567 9909 Sales & Marketing 11F, No. 306-3, SEC. 1, Ta Tung Road, Hsichih, Taipei Hsien 221, Taiwan T E L : +886-2-8692 1591 F A X : +886-2-8692 1596 2004/05/01 Preliminary Rev. 1.1 Champion Microelectronic Corporation Page 10 |
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