MIC5202 Micrel MIC5202 Dual 100mA Low-Dropout Regulator General Description Features The MIC5202 is a family of dual linear voltage regulators with very low dropout voltage (typically 17mV at light loads and 210mV at 100mA), and very low ground current (1mA at 100mA output–each section), offering better than 1% initial accuracy with a logic compatible ON/OFF switching input. Designed especially for hand-held battery powered devices, the MIC5202 is switched by a CMOS or TTL compatible logic signal. This ENABLE control my be tied directly to VIN if unneeded. When disabled, power consumption drops nearly to zero. The ground current of the MIC5202 increases only slightly in dropout, further prolonging battery life. Key MIC5202 features include protection against reversed battery, current limiting, and over-temperature shutdown. • • • • • • • • • • • • High output voltage accuracy Variety of output voltages Guaranteed 100mA output Low quiescent current Low dropout voltage Extremely tight load and line regulation Very low temperature coefficient Current and thermal limiting Reverse-battery protection Zero OFF mode current Logic-controlled electronic shutdown Available in SO-8 package Applications The MIC5202 is available in several fixed voltages. Other options are available; contact Micrel for details. • • • • • • • Cellular Telephones 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 Ordering Information Part Number Volts Accuracy Temperature Range Package Standard Pb-Free MIC5202-3.0BM MIC5202-3.0YM 3.0 1% –40°C to +125°C SO-8 MIC5202-3.3BM MIC5202-3.3YM 3.3 1% –40°C to +125°C SO-8 MIC5202-4.8BM MIC5202-4.8YM 4.85 1% –40°C to +125°C SO-8 MIC5202-5.0BM MIC5202-5.0YM 5.0 1% –40°C to +125°C SO-8 * Junction Temperature Other voltages are available; contact Micrel for details. Typical Application Pin Configuration MIC5202-3.3 Output A Enable A Output B Enable B 1µ (x2) VOUT (A) GROUND VOUT (B) VIN (A) ENABLE (A ) VIN (B) GROUND ENABLE (B ) MIC5202-xxBM Both GROUND pins must be tied to the same potential. VIN (A) and VIN (B) may run from separate supplies. ENABLE pins may be tied directly to VIN Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com March 2006 1 MIC5202 MIC5202 Micrel Absolute Maximum Ratings Recommended Operating Conditions Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device beyond its specified Operating Ratings. Input Voltage ................................................................2.5V to 26V Operating Junction Temperature Range.............. –40°C to +125°C ENABLE Input Voltage ......................................................0V to VIN Power Dissipation ................................................ Internally Limited Lead Temperature (Soldering, 5 seconds) ............................260°C Operating Junction Temperature Range.............. –40°C to +125°C Input Supply Voltage .................................................–20V to +60V ENABLE Input Voltage ..............................................–20V to +60V SO-8 θJA ........................................................................See Note 1 Electrical Characteristics Limits in standard typeface are for TJ = 25°C and limits in boldface apply over the junction temperature range of –40°C to +125°C. Specifications are for each half of the (dual) MIC5202. Unless otherwise specified, VIN = VOUT + 1V, IL = 1mA, CL = 10µF, and VCONTROL ≥ 2.0V. Symbol Parameter Condition Min VO Output Voltage Variation from specified VOUT Accuracy ΔVO ppm/°C ΔT Output Voltage (Note 2) ΔVO VO Line Regulation ΔVO VO Typ –1 –2 Max Units 1 2 % 40 150 VIN = VOUT + 1 V to 26V 0.004 0.10 0.40 % Load Regulation IL = 0.1mA to 100mA (Note 3) 0.04 0.16 0.30 % VIN – VO Dropout Voltage (Note 4) IL = 100µA IL = 20mA IL = 30mA IL = 50mA IL = 100mA 17 130 150 180 225 IQ Quiescent Current VCONTROL ≤ 0.7V (Shutdown) 0.01 µA IGND Ground Pin Current VCONTROL ≥ 2.0V, IL = 100µA IL = 20mA IL = 30mA IL = 50mA IL = 100mA 170 270 330 500 1200 µA PSRR Ripple Rejection IGNDDO Ground Pin Current at Dropout VIN = 0.5V less specified VOUT, IL = 100µA (Note 5) ILIMIT Current Limit VOUT = 0V 280 mA ΔVO ΔPD Thermal Regulation (Note 6) 0.05 %/W en Output Noise 100 µV Temperature Coef. mV 350 1500 75 270 dB 330 µA Control Input VIL IIL IH MIC5202 Input Voltage Level Logic Low Logic High Control Input Current OFF ON 0.7 V 2.0 VIL ≤ 0.7V VIH ≥ 2.0V 0.01 8 2 µA 50 March 2006 MIC5202 Micrel Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its rated operating conditions. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX) the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P(MAX) = (TJ(MAX) – TA) / θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The junction to ambient thermal resistance of the MIC5202BM is 160°C/W mounted on a PC board. Note 2: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Note 3: Regulation is measured at 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 due to heating effects are covered by the thermal regulation specification. Note 4: 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. Note 5: 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. Note 6: 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, and is measured Typical Characteristics (Each Regulator—2 Regulators/Package) Dropout Voltage vs. Output Current Dropout Voltage vs. Temperature 250 Dropout Characteristics 0.4 3.5 3.0 200 0.3 IL = 100mA 2.5 IL = 100mA 150 2.0 0.2 1.5 100 0 0.01 1.0 0.1 50 0.1 1 10 100 OUTPUT CURRENT (mA) 1000 I L = 1mA 0.0 -60 -30 Ground Current vs. Output Current 0 30 60 90 120 150 TEMPERATURE (°C) 0 3.5 1.4 3.0 1 2.5 IL = 100mA 1.0 2 4 6 8 INPUT VOLTAGE (V) 10 Output Voltage vs. Output Current 1.6 1.2 2.0 C IN = 2.2µF C OUT = 4.7µF 0.8 1.5 0.6 1.0 0.4 IL = 1mA 0.2 March 2006 0.0 Ground Current vs. Supply Voltage 10 0.1 0.01 IL = 100µA, 1mA 0.5 0.1 1 10 OUTPUT CURRENT (mA) 100 0.0 0 2 4 6 8 SUPPLY VOLTAGE (V) 3 0.5 10 0.0 0.0 0.1 0.2 OUTPUT CURRENT (A) 0.3 MIC5202 MIC5202 Micrel Ground Current vs. Temperature Ground Current vs. Temperature Thermal Regulation (3.3V Version) 1.5 0.30 I LOAD = 100µA C IN = 2.2µF C OUT = 4.7µF 0.25 1.4 1.3 100 I LOAD = 100mA C IN = 2.2µF C OUT = 4.7µF 50 0 C L = 4.7 µF -50 200 1.2 0.20 100 1.1 0.15 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 1.0 -50 C IN = 2.2µF C OUT = 4.7µF 3.5 3.4 3.3 3.2 3 DEVICES: HI / AVG / LO 3.1 CURVES APPLICABLE AT 100µA AND 100mA 3.0 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 0 50 100 TEMPERATURE (°C) 200 150 C IN = 2.2µF C OUT = 4.7µF V OUT = 3.3V 1 2 3 4 5 INPUT VOLTAGE (V) 6 0 -2 Supply Current vs. Supply Voltage (3.3V Version) Load Transient -10 -20 300 -30 C L = 4.7µF 100 0 2 4 6 TIME (ms) 8 10 R L = 33Ω 20 0 MIC5202 0 1 2 3 4 5 6 7 8 9 10 SUPPLY VOLTAGE (V) 0 30 40 Line Transient 10 C L = 10 µF IL = 1mA 5 -5 0 -108 -58 6 6 4 4 2 -0.2 10 20 TIME (ms) 15 C L = 1 µF IL = 1mA 0 60 0 -10 Line Transient 5 80 C L = 47µF 200 10 100 10 15 20 25 30 35 TIME (ms) 20 10 0 100 7 5 3.30 3.29 3.28 C IN = 2.2µF 3.27 C OUT = 4.7µF I LOAD = 1mA 3.26 3.25 3.24 3.23 3.22 3.21 3.20 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 200 120 40 0 300 280 260 240 220 V OUT = 3.3V 200 180 V OUT = 0V 160 (SHORT CIRCUIT) 140 120 100 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 20 10 0 -10 -20 300 -30 250 0 -5 Load Transient 300 50 -100 Minimum Input Voltage vs. Temperature Short Circuit Current vs. Input Voltage 100 150 Output Current vs. Temperature Output Voltage vs. Temp. (3.3V Version) 3.6 0 0 0.2 0.4 TIME (ms) 4 0.6 0.8 2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 TIME (ms) March 2006 MIC5202 Micrel Supply Current vs. Supply Voltage (3.3V Version) Enable Transient (3.3V Version) 5 4 3 2 1 0 -14 60 50 40 30 R L = 66Ω 20 10 0 0 1 2 3 4 5 SUPPLY VOLTAGE (V) 6 7 2 2 0 0 -2 -50 50 100 150 200 250 300 TIME (µs) 35 1000 30 IL = 100µA 25 10 1 0 1.4 15 IL = 100mA 0 -5 -60 -30 0.001 C IN = 2.2µF C OUT = 4.7µF 1 ON V EN = 5V 0.8 5 0.01 50 100 150 200 250 300 TIME (µs) Enable Voltage Threshold vs. Temperature 1.2 10 0.1 0 1.6 C IN = 2.2µF C OUT = 4.7µF 20 IL = 1mA C L = 4.7 µF IL = 100mA -2 -50 Enable Current Threshold vs. Temperature Output Impedance 100 C L = 4.7 µF IL = 1mA Enable Transient (3.3V Version) 5 4 3 2 1 0 -14 OFF 0.6 V EN = 2V 0 30 60 90 120 150 TEMPERATURE (°C) 0.4 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) FREQUENCY (Hz) Ripple vs. Frequency 100 80 Ripple vs. Frequency 100 IL = 100µA Ripple vs. Frequency 100 80 80 I L = 1mA IL = 100mA 60 60 60 40 40 40 20 20 20 0 0 0 FREQUENCY (Hz) March 2006 FREQUENCY (Hz) 5 FREQUENCY (Hz) MIC5202 MIC5202 Micrel Applications Information Thermal Considerations Part I. Layout External Capacitors The MIC5202-xxBM (8-pin surface mount package) has the following thermal characteristics when mounted on a single layer copper-clad printed circuit board. A 1µF capacitor is recommended between the MIC5202 output and ground to prevent oscillations due to instability. Larger values serve to improve the regulator’s transient response. Most types of tantalum or aluminum electrolytics will be adequate; film types will work, but are costly and therefore not recommended. Many aluminum electrolytics have electrolytes that freeze at about –30°C, so solid tantalums are recommended for operation below –25°C. The important parameters of the capacitor are an effective series resistance of about 5Ω or less and a resonant frequency above 500kHz. The value of this capacitor may be increased without limit. θJA PC Board Dielectric FR4 Ceramic 160°C/W 120°C/W Multi-layer boards having a ground plane, wide traces near the pads, 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. At lower values of output current, less output capacitance is required for output stability. The capacitor can be reduced to 0.47µF for current below 10mA or 0.33µF for currents below 1 mA. A 1µF capacitor should be placed from the MIC5202 input to ground if there is more than 10 inches of wire between the input and the AC filter capacitor or if a battery is used as the supply. Part II. Nominal Power Dissipation and Die Temperature The MIC5202-xxBM at a 25°C ambient temperature will operate reliably at up to 625mW power dissipation when mounted in the “worst case” manner described above. At an ambient temperature of 55°C, the device may safely dissipate 440mW. These power levels are equivalent to a die temperature of 125°C, the recommended maximum temperature for nonmilitary grade silicon integrated circuits. ENABLE Input The MIC5202 features nearly zero OFF mode current. When the ENABLE input is held below 0.7V, all internal circuitry is powered off. Pulling this pin high (over 2.0V) re-enables the device and allows operation. The ENABLE pin requires a small amount of current, typically 15µA. While the logic threshold is TTL/CMOS compatible, ENABLE may be pulled as high as 30V, independent of the voltage on VIN. The two portions of the MIC5202 may be enabled separately. General Notes The MIC5202 will remain stable and in regulation with no load in addition to the internal voltage divider, unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Thermal shutdown is independant on both halfs of the dual MIC5202, however an over-temperature condition on one half might affect the other because of proximity. When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground. 50 mil 245 mil Both MIC5202 GROUND pins must be tied to the same ground potential. Isolation between the two halfs allows connecting the two VIN pins to different supplies. MIC5202 150 mil 30 mil 50 mil Minimum recommended board pad size, SO-8. 6 March 2006 MIC5202 Micrel Package Information 8-Pin SOP (M) MICREL INC. TEL 2180 FORTUNE DRIVE + 1 (408) 944-0800 FAX SAN JOSE, CA 95131 + 1 (408) 474-1000 WEB USA http://www.micrel.com This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. 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. © 2005 Micrel Incorporated March 2006 7 MIC5202