CM2855 ETC | Alldatasheet

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300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 Champion Microelectronic Corporation Page 1 GENERAL DESCRIPTION

FEATURES

The CM2855 family is positive, linear regulators featured low quiescent current (30µA typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-23-6 package is attractive for “Pocket” and “Hard Held” applications. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the “Worst” of operating conditions. An additional feature is a “Power Good” detector, which pulls low when the output is out of regulation. The CM2855 is stable with an output capacitance of 2.2µF or greater. ‹ Very Low Dropout Voltage ‹ Low Current Consumption: Typ. 30µA, Max. 35µA ‹ High Accuracy Output Voltage: +/- 2.5% ‹ Guaranteed 300mA Output ‹ Input Range of 2.6V to 7.0V ‹ Thermal Shutdown ‹ Current Limiting ‹ Power Good Output Function ‹ Compact Package: SOT-23-6 ‹ Adjustable Output Voltages ‹ Short Circuit Current Fold-Back ‹ Low Temperature Coefficient

APPLICATIONS

‹ Battery-powered devices ‹ Personal communication devices ‹ Home electric/electronic appliances ‹ PC peripherals TYPICAL APPLICATIONS IN OUT EN CM2855 PG GND ADJ IN OUT 1uF 2.2uF Note: 1. Suggest to add a small Cap 100pF between OUT and connection of R1and R2 to get less VOUT ripple Vout = Vref * (1 + R1/R2); Vref = 1.176V 2. Enable pin can not be floating.

300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 Champion Microelectronic Corporation Page 2 PIN CONFIGURATION SOT-23-6 Top View VIN VOUT EN 4PG GND 5ADJ BLOCK DIAGRAM Overcurrent Shutdown Thermal Shutdown IN OUT GND Vref = 1.176V AMP PG EN 1uA Vref x 85% ADJ

300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 Champion Microelectronic Corporation Page 3

ORDERING INFORMATION

Part Number Output Voltage Temperature Range Package CM2855IM26 Adjustable -40 ℃ ~ +85 ℃ SOT-23-6 CM2855GIM26* Adjustable -40 ℃ ~ +85 ℃ SOT-23-6 *Note: G : Suffix for Pb Free Product 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 (ΘJA) SOT-23-6 260 ℃/W Internal Power Dissipation (PD) SOT-23-6 Note 1 Maximum Junction Temperature 150 ℃ Maximum Lead Temperature (10 Sec) 300 ℃ Caution: Stress above the listed absolute rating may cause permanent damage to the device. Note 1: PD(MAX) = (TJ(MAX) – TA)/θJA, where θJA depends on the printed circuit layout.

300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 Champion Microelectronic Corporation Page 4

ELECTRICAL CHARACTERISTICS

TA = +25℃; VIN = VIN(MIN) unless otherwise noted CM2855 Parameter Symbol Test Conditions Min. Typ. Max. Unit Input Voltage V IN Note 2 7 V Output Voltage Accuracy V OUT I O = 1mA -2.5 2.5 % 1.2V< VO(NOM)<=2.0V 1300 2.0V< VO(NOM)<=2.5V 800 Dropout Voltage V DROPOUT IO = 300mA, VOUT=VO(NOM)-2.5%, 2.5V< VO(NOM) 300 mV Output Current I O V OUT > 1.2V 300 mA Current Limit I LIM V OUT > 1.2V 800 mA Short Circuit Current I SC V OUT < 0.8V (Note 3) 150 mA Quiescent Current I Q I O = 0mA 30 35 μA Ground Pin Current I GND I O = 1mA to 300mA 30 35 μA Bandgap Reference V BG V O = VBG, load = 10mA 1.168 1.176 1.184 V VOUT+2 Load Regulation REG LOAD I O=1mA to 300mA 0.2 1 % Over Temperature Shutdown OTS 150 ℃ Over Temperature Hysteresis OTH 30 ℃ VOUT Temperature Coefficient TC 25 ppm/ ℃ f=1kHz 60 f=10kHz 50 Power Supply Rejection PSRR IO = 100mA CO=2.2µF ceramic f=100kHz 40 dB Output Voltage Noise eN f=10Hz to 100kHz IO = 10mA CO=2.2µF 30 μVrms IEH V EN=VIN, VIN=2.7V to 7V 0.1 μA EN Input Bias Current IEL V EN=0V, VIN=2.7V to 7V 1.0 3.0 μA VEH V IN=2.7V to 7V V IN/2+0.8V V IN V EN Input Threshold VEL V IN=2.7V to 7V 0 V IN/2-0.8V V Shutdown Supply Current I SD V IN=5.0V, VOUT=0V, VEN < VEL 2.0 μA Shutdown Output Voltage V O, SD I O=300mA 0 0.1 V PG Leakage Current I LC V PG = 7V 1 μA PG Voltage Rating V PG V OUT in regulation 7 V PG Low Threshold % of V O (PG ON) 89.5 % PG High Threshold % of V O (PG OFF) 96.5 % PG Voltage Low V OL I SINK = 2mA 0.1 V VIN = 5V 7.8 ms Delay Time to PG (Note 3) t DELAY VIN = 3V 3.8 ms Note 2. VIN(MIN) = VOUT + VDROPOUT Note 3. Guaranteed by Design, not 100% test. VIN start time needs to be less than 2ms. Note 4. Short Circuit Current and Current limit value will increase as input voltage is larger than VIN(MIN)

300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 Champion Microelectronic Corporation Page 5 DETAILED DESCRIPTION The CM2855 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, output short circuit protection, thermal shutdown, and power good function. 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 CM2855 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The CM2855 also incorporates current fold-back to reduce power dissipation when the output is short-circuited. This feature becomes active when the output drops below 0.95V, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.95V. EXTERNAL CAPACITOR The CM2855 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. ENABLE 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 1µA. This pin behaves much like an electronic switch. POWER GOOD The CM2855 includes the Power Good feature. Normally, Pin 4 is floating, however, when the output is lower than 85% of the specified voltage, it pulls low. This can occur under the following conditions: 1) Input Voltage too low 2) During Over-Temperature 3) During Over-Current

300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 Champion Microelectronic Corporation Page 6 TYPICAL ELECTRICAL CHARACTERISTICS

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300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 Champion Microelectronic Corporation Page 8

300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 Champion Microelectronic Corporation Page 9 PACKAGE DIMENSION SOT-23-6 (M26) 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 L θ 123 6 45

300mA CMOS LDO W ITH EN & PG 2004/6/01 Rev. 1.2 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, au thorized, 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 11F, No. 306-3, SEC. 1, Ta Tung Road, Hsichih, Taipei Hsien 221, Taiwan T E L : +886-3-567 9979 T E L : +886-2-8692 1591 FAX: +886-3-567 9909 FAX: +886-2-8692 1596