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CM2830GFIM89 Datasheet(PDF) 9 Page - Champion Microelectronic Corp. |
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CM2830GFIM89 Datasheet(HTML) 9 Page - Champion Microelectronic Corp. |
9 / 16 page CM2830/CM2830A 300mA CMOS LDO 2004/04/30 Rev. 1.6 Champion Microelectronic Corporation Page 9 ELECTRICAL CHARACTERISTICS TA = +25 ℃; unless otherwise noted CM2830/CM2830A Parameter Test Conditions Min. Typ. Max. Unit Input Voltage Note 1 7 V Output Voltage Accuracy Io = 1mA -1.5 1.5 % 1.2V<VO(NOM)<=2.0V 1300 2.0V<VO(NOM)<=2.5V 800 Dropout Voltage IO = 300mA, VOUT=VO(NOM)-1.5%, 2.5V<VO(NOM) 300 mV Output Current VOUT > 1.2V 300 mA Short Circuit Current VOUT < 1.05V 150 300 mA Current Limit VOUT>1.2V 300 450 mA Quiescent Current VIN=5V, No Load 30 35 µ A Ground Pin Current I = 1mA to 300mA 30 35 µ A IOUT=5mA, VIN=VOUT+1 to VOUT+2, VOUT <= 3.0V -0.15 0.03 0.15 Line Regulation IOUT=5mA, VIN=VOUT+1 to VOUT+2, VOUT > 3.0V -0.3 0.06 0.3 % Load Regulation Io=1mA to 300mA -1 0.2 1 % f=1KHz 60 dB f=10KHz 50 Power Supply Rejection IO = 100mA CO=2.2 F ceramic µ f=100KHz 40 Over Temperature Shutdown 150 ℃ Over Temperature Hysteresis 30 ℃ Output Noise F=10Hz to 100kHz, CO=2.2 µ F, I O = 10mA 30 µ Vrms Output Voltage Temp. Coeff. 25 ppm/℃ Note 1. VIN(MIN) = VOUT + VDROPOUT DETAILED DESCRIPTION The CM2830/CM2830A 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 CM2830/CM2830A switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The CM2830 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 1.05V. EXTERNAL CAPACITOR The CM2830/2830A is stable with an output capacitor to ground of 2.2 µ F 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 0.1 µ F to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground termination is desirable. |
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