CM2838 300mA LOW ESR CMOS LDO WITH ENABLE GENERAL DESCRIPTION FEATURES The CM2838 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: 1.8V, 2.5V, 2.8V, 3.0V, and 3.3V voltage accuracy, making them ideal for battery applications. High Accuracy Output Voltage: +/- 1.5% EN input connected to CMOS has low bias current. The Guaranteed 300mA Output space-saving SOT-23-5 package is attractive for “Pocket” and Input Range up to 7.0V “Hand Held” applications. Thermal Shutdown Current Limiting Stability with Low ESR Capacitors Current limit to prevent device failure under the “Worst” of Compact Package: SOT-23-5 operating conditions. Factory Pre-set Output Voltages Low Temperature Coefficient These rugged devices have both Thermal Shutdown, and 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 1.0μF or greater. APPLICATIONS Battery-powered devices Personal communication devices Home electric/electronic appliances PC peripherals TYPICAL APPLICATIONS IN IN CM2838 BYP GND 5V 2006/10/11 Rev. 1.3 C1 1uF OUT OUT EN C2 1nF Champion Microelectronic Corporation C3 1.0uF Page 1 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE PIN CONFIGURATION SOT-23-5 Top View 4 VIN GND EN BYP VOUT 5 1 2 3 BLOCK DIAGRAM IN 1uA OUT Overcurrent Shutdown Thermal Shutdown R1 EN - BYP AMP + Vref = 1.176V R2 GND 2006/10/11 Rev. 1.3 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 -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 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 Output Current …………………….…… Output Voltage …………………… GND-0.3V to VIN+0.3V PD / (VIN - Vo) mA Junction Temperature Range …..…... -40℃ to +150℃ ESD Classification ………………………………………… B THERMAL INFORMATION Parameter Maximum Thermal Resistance (Θjc) SOT-23-5 160 Internal Power Dissipation (PD) SOT-23-5 250 (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. 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Unit ℃/W mW ℃ ℃ Page 3 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE ELECTRICAL CHARACTERISTICS TA = +25℃; unless otherwise noted Parameter Symbol Input Voltage VIN Output Voltage Accuracy VOUT CM2838 Test Conditions Min. Typ. Note 1 IO = 1mA to 300mA -1.5 1.2V<VO(NOM) ≤ 2.0V IO = 300mA, Unit 7 V 1.5 % 1300 2.0V<VO(NOM) ≤ 2.5V Dropout Voltage VDROPOUT Output Current IO VOUT > 1.2V 300 300 VOUT=VO(NOM)-1.5%, Max. mV 400 300 2.5V<VO(NOM) mA Current Limit ILIM VOUT > 1.2V Quiescent Current IQ IO = 0mA 30 35 μA Ground Pin Current IGND IO = 1mA to 300mA 30 50 μA 0.02 0.1 % 0.2 1 mA Line Regulation REGLINE IOUT=5mA, VIN=VOUT+1 to VOUT+2 Load Regulation REGLOAD IO=1mA to 300mA Over Temperature Shutdown OTS 150 % ℃ Over Temperature Hysteresis OTH 30 ℃ VOUT Temperature Coefficient TC 40 ppm/℃ Power Supply Rejection PSRR Power Supply Rejection PSRR IO = 100mA CO=2.2μF ceramic f=1kHz 60 f=10kHz 50 f=100kHz 40 IO = 100mA 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 Output Voltage Noise eN Output Voltage Noise eN Shutdown Supply Current ISD VIN=5.0V, VOUT=0V, VEN < VEL IEH VEN=VIN, VIN=2.6V to 7V IEL VEN=0, VIN=2.6V to 7V VEH VIN=2.6V to 7V VEL VIN=2.6V to 7V EN Input Bias Current EN Input Threshold -0.1 450 dB dB μVrms μVrms 2.0 3.0 0.1 μA 2.0 3.0 μA 2 VIN V 0 0.4 V Note 1. VIN(MIN) = VOUT + VDROPOUT 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 4 μA 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 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 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 2μA. This pin behaves much like an electronic switch. EXTERNAL CAPACITOR The CM2838 is stable with a Low ESR output capacitor to ground of 1.0μF 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 0.1μF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground termination is desirable. 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 5 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE TYPICAL CHARACTERISTICS 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 6 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 7 CM2838 300mA LOW ESR CMOS LDO WITH ENABLE PACKAGE DIMENSION SOT-23-5 (M25) D 5 4 b1 With Plating c c1 A A1 E1 E A2 b b Base Metal b1 c Section B-B c1 D E 1 e 2 3 e1 E1 b L L1 e θ1 e1 θ θ1 θ A2 A θ2 θ2 A1 L 2006/10/11 Rev. 1.3 See Section B-B L1 Champion Microelectronic Corporation 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 : -40℃~+85℃ (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 2006/10/11 Rev. 1.3 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 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 Sales & Marketing 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 7F-6, No.32, Sec. 1, Chenggong Rd., Nangang District, Taipei City 115, Taiwan 2006/10/11 Rev. 1.3 T E L : +886-2-2788 0558 F A X : +886-2-2788 2985 Champion Microelectronic Corporation Page 10