BM9209 BOOKLY | Alldatasheet

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300mA CMOS LDO W ITH E NABLE 2007/06/30 www.bookly.com Page 1 GENERAL DESCRIPTION

FEATURES

The BM9209 is the improvement version of CM2838 in Iq , in dropout , also in PSRR for portable wireless products. BM9209 family is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (5 µA typ.) and 0.1uA standby current, lowest dropout voltage, and high output voltage accuracy, making them ideal for battery applications. EN input connected to CMOS has low bias current. Integrated current limit and temperature limit protection circuit. These rugged devices have both Thermal Shutdown, and Current Fold-back 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 BM9209 is stable with an output capacitance of 1.0 µF or greater. ‹ Very Low Dropout Voltage : 160mV @200mA ‹ Low Current Consumption: 5 µA ‹ High Accuracy Output Voltage: +/- 1.5% ‹ Guaranteed 300mA Output ‹ Input Range up to 7.0V ‹ Thermal Shutdown and Current Limiting ‹ Fast enable turn-on time of 20us (typ.) ‹ Compact Package: SOT-23-5 ‹ Factory Pre-set Output Voltages ‹ Short Circuit Current Fold-Back ‹ Low standby(off) current : 0.1uA ‹ Higher PSRR : 60dB (1KHz) ‹ Improved from RT9193 , CM2838 and RT9167

APPLICATIONS

‹ PHS , mobile phone ‹ Wireless lan ‹ Wireless telephone ‹ Digital Camera ‹ Portable GPS ‹ MP4 , portable DVD TYPICAL APPLICATIONS 3 4 +5V Vin GNDEN BYP 5BM9209 1nF ON/OFF 2.2uF 0=OFF 21uF Vout 1

300mA CMOS LDO W ITH E NABLE 2007/06/30 www.bookly.com Page 2 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

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ORDERING INFORMATION

Part Number Output Voltage Temperature Range Package BM9209GDIM25 1.8V -40 ℃ ~ +85 ℃ SOT-23-5 BM9209GKIM25 2.5V -40 ℃ ~ +85 ℃ SOT-23-5 BM9209GNIM25 2.8V -40 ℃ ~ +85 ℃ SOT-23-5 BM9209GPIM25 3.0V -40℃ ~ +85 ℃ SOT-23-5 BM9209GSIM25 3.3V -40℃ ~ +85 ℃ SOT-23-5 Note: For other pre-set output voltage requirements, please contact Bookly 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) Maximum Junction Temperature 150 ℃ Maximum Lead Temperature (10 Sec) 300 ℃ Caution: Stress above the listed absolute rating may cause permanent damage to the device.

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ELECTRICAL CHARACTERISTICS

TA = +25℃; unless otherwise noted BM9209 Parameter Symbol Test Conditions Min. Typ. Max. Unit Input Voltage V IN Note 1 8 V Output Voltage Accuracy V OUT I O = 1mA -1.5 1.5 % 1.2V<VO(NOM)<=2.0V 400 2.0V<VO(NOM)<=2.5V 200 mV Dropout Voltage V DROPOUT IO = 300mA, VOUT=VO(NOM)-2%, 2.5V<VO(NOM) 150 mV Output Current I O V OUT > 1.2V 250 300 mA Current Limit I LIM V OUT > 1.2V 300 450 mA Short Circuit Current I SC V OUT < 0.95V 400 450 mA Quiescent Current I Q I O = 0mA 5 7 µA Ground Pin Current I GND I O = 1mA to 400mA 5 7 µA Line Regulation REG LINE I OUT=5mA, VIN=VOUT+1 to VOUT+2 0.015 0.2 % Load Regulation REG LOAD I O=1mA to 400mA 0.2 1.5 % Over Temperature Shutdown OTS 150 ℃ Over Temperature Hysteresis OTH 30 ℃ VOUT Temperature Coefficient TC 40 ppm/ ℃ f=1kHz 60 f=10kHz 55 Power Supply Rejection PSRR IO = 100mA CO=2.2 µF ceramic f=100kHz 50 dB f=1kHz 65 f=10kHz 62 Power Supply Rejection PSRR IO = 100mA CO=2.2 µF ceramic CBYP=0.01 µF f=100kHz 60 dB CO=2.2 µF 20 Output Voltage Noise eN f=10Hz to 100kHz IO = 10mA, CBYP=0 µF CO=100 µF 15 µVrms CO=2.2 µF 17 Output Voltage Noise eN f=10Hz to 100kHz IO = 10mA, CBYP=0.01 µF CO=100 µF 10 µVrms Shutdown Supply Current I SD V IN=5.0V, VOUT=0V, VEN < VEL 0.1 0.3 µA IEH V EN=VIN, VIN=2.6V to 7V 0.1 µA EN Input Bias Current IEL V EN=0, VIN=2.6V to 7V 0.1 0.3 µA VEH V IN=2.6V to 7V (Note2) V IN V EN Input Threshold VEL V IN=2.6V to 7V 0 0.4 V Note 1. VIN(MIN) = VOUT + VDROPOUT Note 2. Based on our design architecture, the enable input threshold will depend on the input voltage. To ensure the stability of your design application, please set the VEH (MIN) = VIN/2 + 0.8V.

300mA CMOS LDO W ITH E NABLE 2007/06/30 www.bookly.com Page 5 DETAILED DESCRIPTION The BM9209 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 400mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120℃. The BM9209 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The BM9209 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 0.95V. ENABLE The Enable pin normally floats high. When pulled down low voltage, switch off output , the PMOS pass transistor shut off, and all internal circuits are powered down. In this state, the quiescent current is less than 0.1 µA. This pin behaves much like an electronic switch. EXTERNAL CAPACITOR The BM9209 is stable with an output capacitor to ground of 1.0 µF 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 µF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground termination is desirable.

300mA CMOS LDO W ITH E NABLE 2007/06/30 www.bookly.com Page 6 TYPICAL ELECTRICAL CHARACTERISTICS

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300mA CMOS LDO W ITH E NABLE 2007/06/30 www.bookly.com Page 9 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