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| BM9131 BOOKLY MICRO GENERAL DESCRIPTION The BM9131 family is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (40 A typ.), low dropout voltage, and high output voltage accuracy, making them ideal for battery applications. EN input connected to CMOS has low bias current. The space-saving SOT-23-5 package is attractive for "Pocket" and "Hand Held" applications. 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 BM9131 is stable with an output capacitance of 2.2 F or greater. 150mA CMOS LDO FEATURES Good Noise Rejection : 62dB Very Low Dropout Voltage , 0.2V@70mA Low Current Consumption: Typ. 30 A, Max. 50 A Extra low shutdown current: 0.1uA Output Voltage: 1.8V, 2.5V , 2.8V, 3.0V, 3.3V High Accuracy Output Voltage: +/- 1.5% Fast enable start up (turn on time) : 20us Guaranteed 150mA Output Input Range up to 7.0V Thermal Shutdown Current Limiting Compact Package: SOT-23-5 Factory Pre-set 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 IN BYP BM9131 GND OUT EN OUT 5V C1 1uF C2 1nF C3 2.2uF 2004/11/30 www.bookly.com Page 1 BM9131 BOOKLY MICRO PIN CONFIGURATION SOT-23-5 Top View 5 4 150mA CMOS LDO VOUT GND 2 VIN 1 BLOCK DIAGRAM IN EN 3 BYP OUT 1uA Overcurrent Shutdown Thermal Shutdown EN BYP R1 + Vref = 1.176V AMP R2 GND 2004/11/30 www.bookly.com Page 2 BM9131 BOOKLY MICRO ORDERING INFORMATION Part Number BM9131DIM25 BM9131KIM25 BM9131NIM25 BM9131PIM25 BM9131SIM25 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 150mA CMOS LDO Note: For other pre-set output voltage requirements, please contact Bookly Sales office. ABSOLUTE MAXIMUM RATINGS Input Voltage Output Current Output Voltage .................................................. +7V ............................... PD / (VIN - Vo) mA ........................ GND-0.3V to VIN+0.3V OPERATING RATINGS Ambient Temperature Range (TA) ......... -40 to +85 Junction Temperature Range ........... -40 to +125 ESD Classification ................................................ B THERMAL INFORMATION Parameter Maximum Thermal Resistance (jc) SOT-23-5 160 Internal Power Dissipation (PD) SOT-23-5 320 (T = 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. Unit /W /W 2004/11/30 www.bookly.com Page 3 BM9131 BOOKLY MICRO ELECTRICAL CHARACTERISTICS TA = +25; unless otherwise noted BM9131 Min. Note 1 IO = 1mA IO = 150mA, VOUT=VO(NOM)-2%, 1.2V Parameter Input Voltage Output Voltage Accuracy Dropout Voltage Output Current Current Limit Short Circuit Current Quiescent Current Ground Pin Current Line Regulation Load Regulation Over Temperature Shutdown Over Temperature Hysteresis VOUT Temperature Coefficient Power Supply Rejection Symbol VIN VOUT VDROPOUT IO ILIM ISC IQ IGND REGLINE REGLOAD OTS OTH TC PSRR Test Conditions Unit V % mV mV mA mA mA VOUT > 1.2V VOUT > 1.2V VOUT < 0.95V IO = 0mA IO = 1mA to 150mA IOUT=5mA, VIN=VOUT+1 to VOUT+2 IO=1mA to 150mA A A % % ppm/ Power Supply Rejection PSRR Output Voltage Noise Output Voltage Noise Shutdown Supply Current EN Input Bias Current EN Input Threshold eN eN ISD IEH IEL VEH VEL Vrms Vrms A A A V V VIN=5.0V, VOUT=0V, VEN < VEL VEN=VIN, VIN=2.6V to 7V VEN=0, VIN=2.6V to 7V VIN=2.6V to 7V VIN=2.6V to 7V 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. 2004/11/30 www.bookly.com Page 4 BM9131 BOOKLY MICRO DETAILED DESCRIPTION The BM9131 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 150mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120. The BM9131 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The BM9131 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. 150mA CMOS LDO ENABLE The Enable pin normally floats high. 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 0.1 A. This pin behaves much like an electronic switch. EXTERNAL CAPACITOR The BM9131 is stable with an output capacitor to ground of 2.2 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 F to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A "quiet" ground termination is desirable. 2004/11/30 www.bookly.com Page 5 BM9131 BOOKLY MICRO TYPICAL ELECTRICAL CHARACTERISTICS 150mA CMOS LDO 2004/11/30 www.bookly.com Page 6 BM9131 BOOKLY MICRO 150mA CMOS LDO 2004/11/30 www.bookly.com Page 7 BM9131 BOOKLY MICRO PACKAGE DIMENSION SOT-23-5 (M25) D 5 4 150mA CMOS LDO b1 c1 With Plating A c A1 A2 E1 b Base Metal Section B-B E b b1 c c1 D E 1 2 3 e e1 E1 b L L1 e e1 1 1 2 A2 A 2 A1 See Section B-B 2004/11/30 www.bookly.com L L1 Page 8 |
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