MIC5202 Dual, 100mA Low-Dropout Regulator General Description Features The MIC5202 is a dual linear voltage regulator with low dropout voltage (typically 17mV at light loads and 210mV at 100mA), and low ground current (1mA at 100mA per output). Ideal for battery-operated applications, the MIC5202 offers 1% output voltage accuracy and dual enable pins. The enable pins may be driven individually or tied directly to VIN. When the part is disabled, power consumption drops to nearly zero. The MIC5202 ground current increases slightly in dropout, which minimizes power consumption and increases battery life. Some key features include reversed battery protection, current limit, and overtemperature protection. • • • • • • • • • • • • The MIC5202 is available in fixed output voltages in the small 8-pin SOIC package. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. High output voltage accuracy Variety of output voltages Up to 100mA of continuous output current Low ground current Low dropout voltage Excellent line and load regulations Extremely low temperature coefficient Current and thermal limit protections Reverse-battery protection Zero-off mode current Logic-controlled electronic shutdown 8-Pin SOIC package Applications • • • • • • • Cell phones Laptop, notebook, and palmtop computers Battery-powered equipment PCMCIA VCC and VPP regulation/switching Bar code scanners SMPS post-regulator/ DC to DC modules High-efficiency linear power supplies Typical Application Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com May 10, 2013 Revision 2.0 Micrel, Inc. MIC5202 Ordering Information (1) Part Number Marking VOUT1 VOUT2 Accuracy Junction Temperature. Range Package MIC5202-3.0YM 30YM 3V 3V 1% –40°C to +125°C 8-Pin SOIC MIC5202-3.3YM 33YM 3.3V 3.3V 1% –40°C to +125°C 8-Pin SOIC MIC5202-4.8YM 48YM 4.85V 4.85V 1% –40°C to +125°C 8-Pin SOIC MIC5202-5.0YM 50YM 5V 5V 1% –40°C to +125°C 8-Pin SOIC Note: 1. Other voltages are available. Contact Micrel for details. Pin Configuration 8-Pin SOIC (M) (Top View) Pin Description Pin Number Pin Name 1 VOUT1 Output of regulator 1. 2 GND1 Ground pin of LDO1. 3 VOUT2 Output of regulator 2. 4 GND2 Ground pin of LDO2. 5 EN2 Enable input for LDO2. Active-high Input. Logic high = On, logic low = Off. Do not leave floating. 6 VIN2 Voltage input for LDO2. 7 EN1 Enable input for LDO1. Active-high Input. Logic high = On, logic low = Off. Do not leave floating. 8 VIN1 Voltage input for LDO1. May 10, 2013 Pin Function 2 Revision 2.0 Micrel, Inc. MIC5202 Absolute Maximum Ratings(2) Operating Ratings(3) Input Supply Voltage (VIN1, VIN2)................. –20V to +60V Enable Input Voltage (EN1, EN2) .................. –20V to +60V Lead Temperature (soldering, 10s) ............................ 260°C Storage Temperature (Ts)......................... –65°C to +150°C (4) ESD Rating ................................................. ESD Sensitive Input Supply Voltage (VIN1, VIN2) ............... +2.5V to +26V Enable Input Voltage (EN1, EN2) .......................... 0V to VIN Junction Temperature (TJ) .......................... –40°C to 125°C Junction Thermal Resistance SOIC (θJA) .......................................................... 63°C/W Electrical Characteristics(5) VIN = VOUT + 1V; COUT = 10µF; IOUT = 1mA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless otherwise noted. Specifications are for one LDO. Symbol Parameter VOUT Output Voltage Accuracy ΔVOUT/ΔT Output Voltage Temperature (6) Coefficient ΔVOUT/VOUT Line Regulation ΔVOUT/VOUT Load Regulation VIN – VOUT ISHUTDOWN IGND Dropout Voltage Condition (7) (8) Ground Pin Current in Shutdown Ground Pin Current (9) Min. Typ. Max. Units 1 2 % 40 150 ppm/°C VIN = VOUT + 1V to 26V 0.004 0.10 0.40 % IOUT = 0.1mA to 100mA 0.04 0.16 0.30 % IOUT = 100µA IOUT = 20mA IOUT = 30mA IOUT = 50mA IOUT = 100mA 17 130 150 180 225 VEN ≤ 0.7V (shutdown) 0.01 µA VEN ≥ 2.0V, IOUT = 100µA IOUT = 20mA IOUT = 30mA IOUT = 50mA IOUT = 100mA I 170 270 330 500 1200 µA –1 –2 mV 350 1500 Notes: 2. Exceeding the absolute maximum ratings may damage the device. 3. The device is not guaranteed to function outside its operating ratings. 4. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF. 5. Specification for packaged product only. 6. Output voltage temperature coefficient is defined as the worst case voltage change divided by the temperature range. 7. Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 0.1mA to 100mA. Changes in output voltage caused by heating effects are covered by the thermal regulation specification. 8. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. 9. Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the load current plus the ground pin current. May 10, 2013 3 Revision 2.0 Micrel, Inc. MIC5202 Electrical Characteristics(5) (Continued) VIN = VOUT + 1V; COUT = 10µF; IOUT = 1mA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless otherwise noted. Specifications are for one LDO. Symbol Parameter Condition Min. IGNDDO Ground Pin Current in Dropout VIN = 0.5V less than VOUT, IOUT = 100µA PSRR Power Supply Rejection Ratio ILIMIT Short Circuit Current Limit VOUT = 0V Typ. Max. Units 270 330 µA 75 dB 280 mA ΔVOUT/ΔPD Thermal Regulation 0.05 %/W en Output Noise 100 µV (10) Enable Input VEN Enable Input Voltage Logic low = Off Logic high = On IENL IENH Enable Input Current VEN ≤ 0.7V VEN ≥ 2.0V 0.7 V 2.0 0.01 8 50 µA Note: 10. Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 100mA load pulse at VIN = 26V for t = 10ms. May 10, 2013 4 Revision 2.0 Micrel, Inc. MIC5202 Typical Characteristics May 10, 2013 5 Revision 2.0 Micrel, Inc. MIC5202 Typical Characteristics (Continued) May 10, 2013 6 Revision 2.0 Micrel, Inc. MIC5202 Typical Characteristics (Continued) May 10, 2013 7 Revision 2.0 Micrel, Inc. MIC5202 30°C, so tantalum capacitors are recommended for operations below –25°C. An equivalent series resistance (ESR) of 5Ω or less with a resonance frequency above 500 kHz is recommended. The output capacitor value may be increased without limit. Application Information The MIC5202 is a dual linear voltage regulator with low dropout voltage and low ground current features. Ideal for battery operated applications, the MIC5202 offers 1% output voltage accuracy, two independent enable pins, reversed battery protection, short circuit current limit and overtemperature protection. When the MIC5202 is disabled, the ground pin current drops to sub-micro amp and prolongs the battery life. At lower output loads, a smaller output capacitor value is required for output stability. The capacitor can be reduced to 0.47µF for current below 10mA or 0.33µF for current below 1mA. No-Load Stability Unlike many other voltage regulators, the MIC5202 remains stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. Input Supply Voltage VIN1 and VIN2 provide power to each internal circuit and may be tied together. Ground Both ground pins (pin 2 and 4) must be tied to the same ground potential when using a single power supply. Enable Input The MIC5202 features dual active-high enable pins that allow each regulator to be enabled and disabled independently. Forcing the enable pin low disables the regulator and sends it to a “zero” off-mode-current state. In this state, current consumed by the regulator goes nearly to zero. Forcing the enable pin high enables the output voltage. The active-high enable pin typically consumes 8µA of current and cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Input Capacitor A 1µF tantalum or aluminum electrolytic capacitor should be placed close to each VIN pin if there is more than 10 inches of copper between the input and the capacitor, or if a battery is used as the supply. Output Capacitor The MIC5202 requires an output capacitor of 1µF or greater to maintain stability. Increasing the output capacitor leads to an improved transient response; however, the size and cost also increase. Most tantalum and aluminum electrolytic capacitors are adequate; film capacitors will work as well, but at a higher cost. Many aluminum electrolytics have electrolytes that freeze at – May 10, 2013 Thermal Shutdown When the internal die temperature of MIC5202 reaches the limit, the internal driver is disabled until the die temperature falls. 8 Revision 2.0 Micrel, Inc. MIC5202 Part II. Nominal Power Dissipation and Die Temperature At 25°C ambient temperature, the MIC5202 operates reliably at up to 625mW when mounted in the “worst case” manner described in Part I. Layout. At an ambient temperature of 55°C, the device can safely dissipate 440mW. These power levels are equivalent to a die temperature of 125°C, which corresponds to the recommended maximum temperature for nonmilitary grade silicon integrated circuits. Thermal Considerations Part I. Layout The MIC5202 (8-pin SOIC package) has the thermal characteristics shown in Table 1, when mounted on a single-layer copper-clad printed circuit board. Table 1. Thermal Characteristic Consideration PC Board Dielectric θJA FR4 160°C/W Ceramic 120°C/W Multi-layer boards with a dedicated ground plane, wide traces, and large supply bus lines provide better thermal conductivity. The “worst case” value of 160°C/W assumes no ground plane, minimum trace widths, and a FR4 material board. May 10, 2013 9 Revision 2.0 Micrel, Inc. MIC5202 Package Information(11) and Recommended Landing Pattern 8-Pin SOIC Package (M) Note: 11. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2013 Micrel, Incorporated. May 10, 2013 10 Revision 2.0