BM9166AIM89

BM9166 250mA CMOS LDO GENERAL DESCRIPTION The BM9166 family is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (2.5V Io=100mA, VOUT=VOUT-2.0%, VOUT 1.2V VOUT < 1.05V VOUT>1.2V VIN=5V, No Load I = 1mA to 250mA IOUT=5mA, VIN=VOUT+1 to VOUT+2, VOUT 3.0V Io=1mA to 250mA IO = 100mA CO=10µF ceramic f=1KHz f=10KHz f=100KHz -0.15 -0.3 0.03 0.06 0.2 60 60 46 150 30 F=10Hz to 100kHz, CO=10µF, IO = 10mA 30 25 ℃ ℃ μVrms ppm/℃ 300 450 55 60 0.15 0.3 1 150 300 -1.5 150mV 210mV Typ. Max. 7 1.5 Parameter Input Voltage Output Voltage Accurancy Dropout Voltage Output Current Short Circuit Current Current Limit Quiescent Current Ground Pin Current Line Regulation Load Regulation Power Supply Rejection Over Temperature Shutdown Over Temperature Hystersis Output Noise Output Voltage Temp. Coeff. Note 1. VIN(MIN) = VOUT + 0.3V Test Conditions Unit V % mV mV mA mA mA uA uA % % dB DETAILED DESCRIPTION The BM9166 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 350mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120℃. The BM9166 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The BM9166 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 BM9166 is stable with an output capacitor to ground of 2.2µF or 10uF is best. 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. 2004/8/30 www.digitalspirit.info Page 5 BM9166 250mA CMOS LDO TYPICAL ELECTRICAL CHARACTERISTICS 2004/8/30 www.digitalspirit.info Page 6 BM9166 250mA CMOS LDO 2004/8/30 Page 7 BM9166 250mA CMOS LDO 2004/8/30 Page 8 BM9166 250mA CMOS LDO PACKAGE DIMENSION (CONTINUED) SOT-23-3 (M23) D 3 b1 c1 With Plating A c A1 A2 E1 b Base Metal Section B-B E b b1 c c1 D E 1 e e1 2 E1 b L L1 e e1 θ1 θ θ1 θ2 A2 A θ2 A1 See Section B-B SOT-89 (M89) D D1 φ1.0 E H θ L L1 L 5　 C e e1 A 8　 L b b1 C D D1 H E e1 b b1 b e 2004/8/30 Page 9