BM9209 300mA CMOS LDO WITH ENABLE GENERAL DESCRIPTION FEATURES The BM9209 is the improvement version of CM2838 in Iq , in Very Low Dropout Voltage : 160mV @200mA dropout , also in PSRR for portable wireless products. Low Current Consumption: BM9209 family is a positive voltage linear regulator developed Output Voltage: 1.8V, 2.5V, 2.8V, 3.0V, 3.3V utilizing CMOS technology featured low quiescent current High Accuracy Output Voltage: +/- 1.5% Guaranteed 300mA Output voltage, and high output voltage accuracy, making them ideal Input Range up to 7.0V for battery applications. EN input connected to CMOS has low Thermal Shutdown and Current Limiting bias current. Integrated current limit and temperature limit Fast enable turn-on time of 20us (typ.) protection circuit. Compact Package: SOT-23-5 These rugged devices have both Thermal Shutdown, and Factory Pre-set Output Voltages Current Fold-back to prevent device failure under the “Worst” Short Circuit Current Fold-Back of operating conditions. Low standby(off) current : 0.1uA Higher PSRR : 60dB (1KHz) Improved from RT9193 , CM2838 and RT9167 (5 µ A typ.) and 0.1uA standby current, lowest dropout In application requiring a low noise, regulated supply, place a 5µA 1000pF capacitor between Bypass and Ground. The BM9209 is stable with an output capacitance of 1.0 µ F or greater. APPLICATIONS PHS , mobile phone Wireless lan Wireless telephone Digital Camera Portable GPS MP4 , portable DVD TYPICAL APPLICATIONS +5V Vin 1 BM9209 EN 1uF ON/OFF 3 BYP GND 4 2 1nF 5 Vout 2.2uF 0=OFF 2007/06/30 www.bookly.com Page 1 BM9209 300mA CMOS LDO WITH ENABLE PIN CONFIGURATION SOT-23-5 Top View 4 VIN GND EN BYP VOUT 5 1 2 3 BLOCK DIAGRAM IN OUT Overcurrent Shutdown 1uA R1 Thermal Shutdown EN - BYP AMP + Vref = 1.176V R2 GND 2007/06/30 www.bookly.com Page 2 BM9209 300mA CMOS LDO WITH ENABLE ORDERING INFORMATION Part Number BM9209GDIM25 BM9209GKIM25 BM9209GNIM25 BM9209GPIM25 BM9209GSIM25 Output Voltage 1.8V 2.5V 2.8V 3.0V 3.3V Temperature Range -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ -40℃ ~ +85℃ Package SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 Note: For other pre-set output voltage requirements, please contact Bookly Sales office. ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS Input Voltage Ambient Temperature Range (TA) ……... -40℃ to +85℃ …………….……………………………. +8.5V Output Current …………………….…… PD / (VIN - Vo) mA Output Voltage …………………… GND-0.3V to VIN+0.3V Junction Temperature Range …..…... -40℃ to +125℃ ESD Classification ………………………………………… B THERMAL INFORMATION Parameter Maximum Thermal Resistance (Θjc) SOT-23-5 160 Internal Power Dissipation (PD) SOT-23-5 320 (ΔT = 100℃) Maximum Junction Temperature 150 Maximum Lead Temperature (10 Sec) 300 Caution: Stress above the listed absolute rating may cause permanent damage to the device. 2007/06/30 www.bookly.com Unit ℃/W ℃/W ℃ ℃ Page 3 BM9209 300mA CMOS LDO WITH ENABLE ELECTRICAL CHARACTERISTICS TA = +25℃; unless otherwise noted Parameter Symbol Input Voltage VIN Output Voltage Accuracy VOUT Dropout Voltage VDROPOUT Output Current IO BM9209 Test Conditions Min. Typ. Note 1 IO = 1mA IO = 300mA, VOUT=VO(NOM)-2%, -1.5 1.2V<VO(NOM)<=2.0V 400 2.0V<VO(NOM)<=2.5V 200 2.5V<VO(NOM) VOUT > 1.2V 250 300 Max. Unit 8 V 1.5 % mV 150 mV 300 mA Current Limit ILIM VOUT > 1.2V Short Circuit Current ISC VOUT < 0.95V 400 450 450 mA Quiescent Current IQ IO = 0mA 5 7 mA Ground Pin Current IGND IO = 1mA to 400mA 5 7 µA µA Line Regulation REGLINE IOUT=5mA, VIN=VOUT+1 to VOUT+2 0.015 0.2 % Load Regulation REGLOAD IO=1mA to 400mA 0.2 1.5 Over Temperature Shutdown OTS 150 % ℃ Over Temperature Hysteresis OTH 30 ℃ VOUT Temperature Coefficient TC 40 ppm/℃ Power Supply Rejection PSRR IO = 100mA CO=2.2 µ F ceramic PSRR Output Voltage Noise eN Output Voltage Noise eN Shutdown Supply Current EN Input Bias Current EN Input Threshold 60 f=10kHz 55 f=100kHz 50 f=1kHz 65 CO=2.2 µ F ceramic CBYP=0.01 µ F f=10kHz 62 f=100kHz 60 f=10Hz to 100kHz CO=2.2 µ F 20 IO = 100mA Power Supply Rejection f=1kHz IO = 10mA, CBYP=0 µ F f=10Hz to 100kHz IO = 10mA, CBYP=0.01 µ F CO=100 µ F VIN=5.0V, VOUT=0V, VEN < VEL VEN=VIN, VIN=2.6V to 7V IEL VEN=0, VIN=2.6V to 7V VEH VIN=2.6V to 7V VEL VIN=2.6V to 7V µ Vrms 17 CO=100 µ F ISD dB 15 CO=2.2 µ F IEH dB µ Vrms 10 0.3 µA µA µA (Note2) VIN V 0 0.4 V 0.1 0.3 0.1 0.1 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. 2007/06/30 www.bookly.com Page 4 BM9209 300mA CMOS LDO WITH ENABLE 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 µ A. This pin behaves much like an electronic switch. EXTERNAL CAPACITOR The BM9209 is stable with an output capacitor to ground of 1.0 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. 2007/06/30 www.bookly.com Page 5 BM9209 300mA CMOS LDO WITH ENABLE TYPICAL ELECTRICAL CHARACTERISTICS 2007/06/30 www.bookly.com Page 6 BM9209 300mA CMOS LDO WITH ENABLE 2007/06/30 www.bookly.com Page 7 BM9209 300mA CMOS LDO WITH ENABLE 2007/06/30 www.bookly.com Page 8 BM9209 300mA CMOS LDO WITH ENABLE PACKAGE DIMENSION SOT-23-5 (M25) D 5 4 b1 With Plating c c1 A A1 E E1 A2 b b Base Metal b1 c Section B-B c1 D E 1 2 3 e E1 b L e1 L1 e θ1 e1 θ θ1 θ A2 A θ2 θ2 A1 L 2007/06/30 See Section B-B www.bookly.com L1 Page 9