Bay Linear Inspire the Linear Power B5213 100mA, µCap, Low Dropout Voltage Regulator Smallest SC70 Description Features The B5213 is a µCap, low dropout voltage regulator with very low quiescent current, 220 µA typical, at 80mA load. It also has very low dropout voltage, typically 20mV at light load and 330mV at 80mA. The B5213 provides up to 80mA and consumes a typical of 1 µA in disable mode. The B5213 is optimized to work with low value, low cost ceramic capacitors. The output typically require only 0.47 µF of output capacitance for stability. The enable pin can be tied to VIN for easy device layout. The B5213 is designed for portable, battery powered equipment applications with small space requirements. The B5213 is available in a space saving 5- pin SC70 package. Performance is specified for the – 40 °C to + 125 °C temperature range and is available in 2.8V, 3.0V and 3.3V fixed voltages. For other output voltage options, please contact Bay Linear. Pin Connection Output Current 100mA Space Saving SC70 2.8.0V, 3.3V and 3.0V Versions Very Low Quiescent Current Low Dropout Voltage Very Low Temperature Coefficient Needs only 1µF for Stability Error Flag warns of output dropout Logic-Controlled Electronic Shutdown Pin-to-Pin MIC5213 Applications • • • • • • Battery Powered Systems Portable instrumentation Notebooks Computers Potable Consumer Equipment Bar Code Scanner Cellular Phones Ordering Information SC-70 (L5) V IN VOUT 5 1 4 2 3 V EN NC GND Top View Bay Linear, Inc • • • • • • • • • • Package SC70-5 B5213-XX “XX” Voltage Selection Guide Vout 2.8V 3.3V 3.0V XX Code 28 33 3 VEN Logic High = Enabled Logic Low = Shutdown 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B5213 Absolute Maximum Rating Parameter Power Dissipation Lead Temperature ( Soldering 5 seconds ) Storage Temperature Range Operating Junction Temperature Input Supply Voltage VEN Shutdown Input Voltage Package Thermal Resistance Internally Limited 260 °C -65 °C to +150 °C -40 °C to +125 °C 2.7V to 6V 0V to VIN -0.3V to +30V 478°C Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25 °C, VIN = VOUT + 1V, IL = 1mA, CL = 0.47 µF, VEN ≥ 2.0V. Boldface limits apply at the temperature extremes. Parameter Conditions MIN TYP MAX UNIT Output Voltage -3 -4 Output Voltage Temperature Coefficient Line Regulation Load Regulation (Note 10) Dropout Voltage (Note 7) IL = 100µA IL = 20mA IL = 50mA IL = 80mA IL = 100µA, VEN≥2.0V(active) IL = 20mA, VEN≥2.0V(active) IL = 500mA, VEN≥2.0V(active) IL = 80mA, VEN≥2.0V(active) VIN=VOUT(NOMINAL)-0.5V Note (8) VEN≤0.4V(Shutdown) VOUT = 0 20 70 180 330 160 180 200 220 200 110 180 (Note 9) VIL, logic Low (off) VIH, Logic High (on) VEN≤0.4V VIH≥2.0V 0.05 Ground pin Current Ground pin Current at Dropout Quiescent Current Current Limit 50 VIN = VOUT +1V to 6V IL=0.1mA to 80mA (Note 6) 0.008 0.08 3 4 200 0.3 0.3 0.5 % ppm / ° C % % mV 350 600 750 µA 3000 300 170 250 µA µA mA 0.6 %/W µA Enable Input Thermal Regulation Enable Input Voltage Level Enable Input Current Bay Linear, Inc 2.0 0.01 15 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 1 50 µA www.baylinear.com B5213 Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B5213 APPLICATION HINTS The B5213 is a low dropout, linear regulator designed primarily for battery- powered applications. The B5213 can be used with low cost ceramic capacitors, typical value of 0.47 µF. As illustrated in the simplified schematics, the B5213 consists of a 1.25V reference, error amplifier, Pchannel pass transistor and internal feedback voltage diode. The 1.25V reference is connected to the input of the error amp. The error amp compares this reference with the feedback voltage. If the feedback voltage is lower than the reference, the pass transistor gate is pulled lower allowing more current to pass and increasing the output voltage. If the feedback voltage is too high, the pass transistor gate is pulled up allowing less current to pass to the output. The output voltage is feedback through the resistor divider. Additional blocks include short circuit current protection and thermal protection. The B5213 features an 80mA P- channel MOSFET transistor. This provides several advantages over similar designs using PNP pass transistors including longer battery life. The P- channel MOSFET requires no base drive, which reduces quiescent current considerably. PNP based regulators waste considerable amounts of current in dropout when the pass transistor saturates. They also have high base drive currents under large loads. The B5213 does not suffer from these problems and consumes only the specified quiescent current under light and heavy loads. External Capacitors Like any low- dropout regulators, the B5213 requires external capacitors for regulator stability. The B5213 is specially designed for portable applications requiring minimum board space and the smallest components. A 0.1µF capacitor should be placed from VIN to GND if there is more than 10 inches of wire between the input and AC filter or when a battery is used as the input. This capacitor must be Bay Linear, Inc Located a distance of not more than 1cm from the input pin and returned to a clean analog ground. The B5213 is designed to work with small ceramic output capacitors. Ceramic capacitors ranging between 0.47 µF to 4.7 µF are the smallest and least expensive. No- Load Stability The B5213 will remain stable and in regulation with no- load (other than the internal voltage divider). This is especially important in CMOS RAM keep- alive applications. Enable Input The B5213 is shut off by pulling the VEN pin below 0.6V; all internal circuitry is powered off and the quiescent current is typically 1 µA. Pulling the VEN high above 2V re- enables the device and allows operation. If the shut down feature is not used, the VEN pin should be tied to VIN to keep the regulator output on all the time. Thermal Behavior The B5213 regulator has internal thermal shutdown to protect the device from over heating. Under all operating conditions, the maximum junction temperature of the B5213 must be below 125 °C. Maximum power dissipation can be calculated based on the output current and the voltage drop across the part. The maximum power dissipation is PD( MAX) = ( TJ( MAX) - TA)/ φ JA φJA is the junction- to- ambient thermal resistance, 478 °C/ W for the B5213 in the SC70 package. TA is the maximum ambient temperature TJ( MAX) is the maximum junction temperature of the die, 125 °C When operating the B5213 at room temperature, the maximum power dissipation is 209mW. The actual power dissipated by the regulator is PD = ( VIN- VOUT) IL + VIN IGND The figure below shows the voltage and currents, which are present in the circuit. 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B5213 B5213 B5213 34 34 34 Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations, computer simulations and/ or initial prototype evaluation. Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges. The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application. LIFE SUPPORT AND NUCLEAR POLICY Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent of Bay Linear President. Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com