CM2838 CHAMP | Alldatasheet

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Technical content

300mA L OW E SR CMOS LDO W ITH E NABLE GENERAL DESCRIPTION

FEATURES

The CM2838 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 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 1.0μF or greater. ‹ Very Low Dropout Voltage ‹ Low Current Consumption: Typ. 30μA, Max. 35μA ‹ 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 OUT CM2838 BYP GND EN IN OUT 1uF 1.0uF 1nF 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 1

300mA L OW E SR CMOS LDO W ITH E NABLE 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 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 2

300mA L OW E SR CMOS LDO W ITH E NABLE 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 3

ORDERING INFORMATION

Part Number Output Voltage Temperature Range Package CM2838DIM25 1.8V -40℃ ~ +85 ℃ SOT-23-5 CM2838KIM25 2.5V -40℃ ~ +85 ℃ SOT-23-5 CM2838NIM25 2.8V -40℃ ~ +85 ℃ SOT-23-5 CM2838PIM25 3.0V -40℃ ~ +85 ℃ SOT-23-5 CM2838SIM25 3.3V -40℃ ~ +85 ℃ SOT-23-5 CM2838GDIM25 1.8V -40℃ ~ +85 ℃ SOT-23-5 CM2838GKIM25 2.5V -40℃ ~ +85 ℃ SOT-23-5 CM2838GNIM25 2.8V -40℃ ~ +85 ℃ SOT-23-5 CM2838GPIM25 3.0V -40℃ ~ +85 ℃ SOT-23-5 CM2838GSIM25 3.3V -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-23-5 160 ℃/W Internal Power Dissipation (PD) (ΔT = 100℃) SOT-23-5 250 mW 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 L OW E SR CMOS LDO W ITH E NABLE

ELECTRICAL CHARACTERISTICS

TA = +25℃; unless otherwise noted CM2838 Parameter Symbol Test Conditions Min. Typ. Max. Unit Input Voltage VIN Note 1 7 V Output Voltage Accuracy VOUT IO = 1mA to 300mA -1.5 1.5 % 1.2V<VO(NOM) ≤2.0V 1300 2.0V<VO(NOM) ≤2.5V 400Dropout Voltage VDROPOUT IO = 300mA, VOUT=VO(NOM)-1.5%, 2.5V<VO(NOM) 300 mV Output Current IO VOUT > 1.2V 300 mA Current Limit ILIM VOUT > 1.2V 300 450 mA Quiescent Current IQ IO = 0mA 30 35 μA Ground Pin Current IGND IO = 1mA to 300mA 30 50 μA Line Regulation REGLINE IOUT=5mA, VIN=VOUT+1 to VOUT+2 -0.1 0.02 0.1 % Load Regulation REGLOAD IO=1mA to 300mA 0.2 1 % Over Temperature Shutdown OTS 150 ℃ Over Temperature Hysteresis OTH 30 ℃ VOUT Temperature Coefficient TC 40 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 ISD VIN=5.0V, VOUT=0V, VEN < VEL 2.0 3.0 μA IEH VEN=VIN, VIN=2.6V to 7V 0.1 μA EN Input Bias Current IEL VEN=0, VIN=2.6V to 7V 2.0 3.0 μA VEH VIN=2.6V to 7V 2 VIN V EN Input Threshold VEL VIN=2.6V to 7V 0 0.4 V Note 1. VIN(MIN) = VOUT + VDROPOUT 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 4

300mA L OW E SR CMOS LDO W ITH E NABLE 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 5 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.

300mA L OW E SR CMOS LDO W ITH E NABLE TYPICAL CHARACTERISTICS 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 6

300mA L OW E SR CMOS LDO W ITH E NABLE 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 7

300mA L OW E SR CMOS LDO W ITH E NABLE 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 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 8

300mA L OW E SR CMOS LDO W ITH E NABLE 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 9 NUMBERING SCHEME 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 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 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

300mA L OW E SR CMOS LDO W ITH E NABLE 2006/10/11 Rev. 1.3 Champion Microelectronic Corporation Page 10 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 involv e potential risks of death, personal injury, or severe property or environmental damage. CMC integrated circ uit 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 cust omer. In order to minimize risks associated with the customer’s applications, th e 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 7F-6, No.32, Sec. 1, Chenggong Rd., Nangang District, Taipei City 115, Taiwan T E L : +886-3-567 9979 T E L :+886-2-2788 0558 FAX: +886-3-567 9909 FAX: +886-2-2788 2985