MIC5210 Dual 150mA LDO Regulator General Description Features The MIC5210 is a dual linear voltage regulator with very low dropout voltage (typically 10mV at light loads and 140mV at 100mA), very low ground current (225µA at 10mA output), and better than 1% initial accuracy. It also features individual logic-compatible enable/shutdown control inputs. Both regulator outputs can supply up to 150mA at the same time as long as each regulator’s maximum junction temperature is not exceeded. Key features include an undervoltage monitor with an error flag output, a reference bypass pin to improve its already low-noise performance (8-pin versions only), reversedbattery protection, current limiting, and overtemperature shutdown. Designed especially for hand-held battery powered devices, the MIC5210 can be switched by a CMOS or TTL compatible logic signal, or the enable pin can be connected to the supply input for 3-terminal operation. When disabled, power consumption drops nearly to zero. Dropout ground current is minimized to prolong battery life. Key features include current limiting, overtemperature shutdown, and protection against reversed battery. The MIC5210 is available in 2.7V, 2.8V, 3.0V, 3.3V, 3.6V, 4.0V and 5.0V fixed voltage configurations. Other voltages are available; contact Micrel for details. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. • • • • • • • • • • • Micrel Mini 8™ MSOP package Up to 150mA per regulator output Low quiescent current Low dropout voltage Wide selection of output voltages Tight load and line regulation Low temperature coefficient Current and thermal limiting Reversed input polarity protection Zero off-mode current Logic-controlled electronic enable Applications • • • • • • Cellular telephones Laptop, notebook, and palmtop computers Battery-powered equipment Bar code scanners SMPS post-regulator/dc-to-dc modules High-efficiency linear power supplies Typical Application Low-Noise + Ultralow-Noise (Dual) Regulator MM8 and Micrel Mini 8 are trademarks of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com September 2006 1 M9999-090806 Micrel, Inc. MIC5210 Ordering Information Part Number Standard Marking Pb-Free Marking Voltage* Side A/B Accuracy Junction Temp. Range Package MIC5210-2.7BMM Contact Factory 2.7V/2.7V 1.0% –40° to +125°C 8-Pin MSOP MIC5210-2.8BMM MIC5210-2.8YMM 2.8V/2.8V 1.0% –40° to +125°C 8-Pin MSOP MIC5210-2.9BMM Contact Factory 2.9V/2.9V 1.0% –40° to +125°C 8-Pin MSOP MIC5210-3.0BMM MIC5210-3.0YMM 3.0V/3.0V 1.0% –40° to +125°C 8-Pin MSOP MIC5210-3.3BMM MIC5210-3.3YMM 3.3V/3.3V 1.0% –40° to +125°C 8-Pin MSOP MIC5210-3.6BMM Contact Factory 3.6V/3.6V 1.0% –40° to +125°C 8-Pin MSOP MIC5210-4.0BMM Contact Factory 4.0V/4.0V 1.0% –40° to +125°C 8-Pin MSOP MIC5210-5.0BMM MIC5210-2.8/3.0BMM MIC5210-5.0YMM MP MIC5210-MPYMM** MPY 5.0V/5.0V 1.0% –40° to +125°C 8-Pin MSOP 2.8V/3.0V 1.0% –40° to +125°C 8-Pin MSOP * Other voltages available. Contact Micrel for details. ** Order Entry P/N for Pb-Free has been abbreviated in compliance with Micrel systems. MIC5210-MPYMM = Full P/N: MIC5210-2.8/3.0YMM. Voltage Code Key 2.8 M 3.0 P September 2006 2 M9999-090806 Micrel, Inc. MIC5210 Pin Configuration MIC5210BMM Pin Description Pin Number Pin Name 1 OUTA Regulator Output A 2 GND Ground 3 OUTB Regulator Output B 4 BYPB Reference Bypass B: Connect external 470pF capacitor to GND to reduce output noise in regulator “B”. May be left open. 5 ENB Enable/Shutdown B (Input): CMOS compatible input. Logic high = enable, logic low or open = shutdown. Do not leave floating. 6 INB Supply Input B 7 ENA Enable/Shutdown A (Input): CMOS compatible input. Logic high = enable, logic low or open = shutdown. Do not leave floating. 8 INA Supply Input A September 2006 Pin Function 3 M9999-090806 Micrel, Inc. MIC5210 Absolute Maximum Ratings Operating Ratings Supply Input Voltage (VIN).............................. –20V to +20V Enable Input Voltage (VEN)............................. –20V to +20V Power Dissipation (PD) ..............................Internally Limited Storage Temperature Range ....................–60°C to +150°C Lead Temperature (soldering, 5 sec.)........................ 260°C Supply Input Voltage (VIN)................................. 2.5V to 16V Enable Input Voltage (VEN)................................... 0V to 16V Junction Temperature (TJ) .......................... –40°C to +85°C Thermal Resistance (θJA).......................................... Note 1 Electrical Characteristics VIN = VOUT +1V; IL = 100µA; CL = 1.0µF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C < TJ < +125°C, unless noted. Symbol Parameter Condition Min Typ VO Output Voltage Accuracy Variation from specified VOUT ∆VO/∆T Output Voltage Temperature Coefficient Note 2 ∆VO/VO Line Regulation VIN = VOUT +1V to 16V 0.004 0.012 0.05 %/V %/V ∆VO/VO Load Regulation IL = 0.1mA to 150mA (Note 3) 0.02 0.2 0.5 % % VIN – VO Dropout Voltage, Note 4 IL = 100µA 10 IL = 50mA 110 IL = 100mA 140 IL = 150mA 165 50 70 150 230 250 300 275 350 mV mV mV mV mV mV mV mV –1 –2 Max Units 1 2 % % ppm/°C 40 IGND Quiescent Current VEN ≤ 0.4V (shutdown) VEN ≤ 0.18V (shutdown) 0.01 1 5 µA µA IGND Ground Pin Current, Note 5 (per regulator) VEN ≥ 2.0V, IL = 100µA 80 IL = 50mA 350 IL = 100mA 600 IL = 150mA 1300 125 150 600 800 1000 1500 1900 2500 µA µA µA µA µA µA µA µA PSRR Ripple Rejection Frequency = 100Hz, IL = 100µA 75 ILIMIT Current Limit VOUT = 0V 320 ∆VO/∆PD Thermal Regulation Note 6 0.05 %/W eno Output Noise (Regulator B only) IL = 50mA, CL = 2.2µF, 470pF from BYPB to GND 260 nV/√Hz September 2006 4 dB 500 mA M9999-090806 Micrel, Inc. Symbol MIC5210 Parameter Condition Min Typ Max Units 0.4 0.18 V V Enable Input VIL Enable Input Logic-Low Voltage Regulator shutdown VIH Enable Input Logic-High Voltage Regulator enabled IIL Enable Input Current VIL ≤ 0.4V VIL ≤ 0.18V VIH ≥ 2.0V VIH ≥ 2.0V IIH V 2.0 0.01 5 –1 –2 20 25 µA µA µA µA Notes: 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 operating ratings. 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: PD(max) = (T J(max) – TA) / θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The θJA of the 8-pin MSOP (MM) is 200°C/W mounted on a PC board (see “Thermal Considerations” section for further details). 2. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. 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 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. 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. 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. 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 150mA load pulse at VIN = 16V for t = 10ms. September 2006 5 M9999-090806 Micrel, Inc. MIC5210 Typical Characteristics Power Supply Rejection Ratio VIN = 6V VOUT = 5V -60 0 VIN = 6V VOUT = 5V -20 -40 -60 IOUT = 100mA COUT = 1µF 0 PSRR (dB) -20 TIME (µs) -40 -60 -100 1E+1 10k 100k1E+61E+7 1M 10M 10 1E+21E+3 100 1k 1E+41E+5 FREQUENCY (Hz) -20 IOUT = 100mA 10mA COUT = 2.2µF CBYP = 0.01µF September 2006 PSRR (dB) RIPPLE REJECTION (dB) 0 1mA 0.1 0.2 0.3 VOLTAGE DROP (V) IOUT = 100µA COUT = 2.2µF CBYP = 0.01µF 0.4 -60 IOUT = 1mA COUT = 2.2µF CBYP = 0.01µF -100 1E+1 10k 100k1E+61E+7 1M 10M 10 1E+21E+3 100 1k 1E+41E+5 FREQUENCY (Hz) Turn-On Time vs. Bypass Capacitance Power Supply Ripple Rejectio vs. Voltage Drop 60 50 Power Supply Rejection Ratio 1mA 40 10mA 30 COUT = 1µF 10 0 10 VIN = 6V VOUT = 5V 1 -60 IOUT = 100mA COUT = 2.2µF CBYP = 0.01µF -100 10k 100k1E+61E+7 1M 10M 1E+1 10 1E+21E+3 100 1k 1E+41E+5 FREQUENCY (Hz) 6 IOUT = 100mA 20 0 100 1000 10000 CAPACITANCE (pF) -40 -80 -40 -80 100 10 10 Power Supply Ripple Rejection vs. Voltage Drop 100 90 80 70 60 50 40 30 20 10 0 0 -60 1000 IOUT = 10mA COUT = 2.2µF CBYP = 0.01µF -80 VIN = 6V VOUT = 5V -20 -40 10000 VIN = 6V VOUT = 5V Power Supply Rejection Ratio 0 VIN = 6V VOUT = 5V -100 1E+1 10k 100k1E+61E+7 1M 10M 10 1E+21E+3 100 1k 1E+41E+5 FREQUENCY (Hz) Power Supply Rejection Ratio IOUT = 10mA COUT = 1µF -100 1E+1 10k 100k1E+61E+7 1M 10M 10 1E+21E+3 100 1k 1E+41E+5 FREQUENCY (Hz) Power Supply Rejection Ratio -80 -100 1E+1 10k 100k1E+61E+7 1M 10M 10 1E+21E+3 100 1k 1E+41E+5 FREQUENCY (Hz) -60 RIPPLE REJECTION (dB) -80 -40 -80 IOUT = 1mA COUT = 1µF PSRR (dB) Power Supply Rejection Ratio VIN = 6V VOUT = 5V -20 -100 1E+1 10k 100k1E+61E+7 1M 10M 10 1E+21E+3 100 1k 1E+41E+5 FREQUENCY (Hz) PSRR (dB) PSRR (dB) -20 -60 -80 IOUT = 100µA COUT = 1µF -100 1E+1 10k 100k1E+61E+7 1M 10M 10 1E+21E+3 100 1k 1E+41E+5 FREQUENCY (Hz) 0 VIN = 6V VOUT = 5V -40 Power Supply Rejection Ratio 0 PSRR (dB) -40 -80 Power Supply Rejection Ratio -20 PSRR (dB) -20 PSRR (dB) 0 NOISE (µV/ Hz) 0 0.1 0.2 0.3 VOLTAGE DROP (V) 0.4 Noise Performance 10mA, COUT = 1µF 0.1 1mA COUT = 1µF 0.01 CBYP = 10nF (Reg. B only) 0.001 VOUT = 5V 0.0001 10 100 1E+31E+41E+51E+61E+7 1E+11E+2 1k 10k 100k 1M 10M FREQUENCY (Hz) M9999-090806 Micrel, Inc. Noise Performance VOUT = 5V 1mA 0.001 C OUT = 10µF electrolytic 0.0001 10 100 1E+31E+4 1k 10k 1E+51E+61E+7 1E+11E+2 100k 1M 10M FREQUENCY (Hz) 10 Noise Performance (Regulator B) NOISE (µV/ Hz) 1 0.1 10mA 100mA 0.01 V 1mA OUT = 5V COUT = 10µF 0.001 electrolytic CBYP = 1nF 0.0001 10 100 1E+31E+4 1k 10k 1E+51E+61E+7 1E+11E+2 100k 1M 10M FREQUENCY (Hz) September 2006 0.1 100mA 10mA 0.01 VOUT = 5V COUT = 22µF 1mA 0.001 tantalum CBYP = 10nF 0.0001 10 100 1E+31E+4 1k 10k 1E+51E+61E+7 1E+11E+2 100k 1M 10M FREQUENCY (Hz) 10 Noise Performance (Regulator B) 1 NOISE (µV/ Hz) 0.01 10 0.01 V 1mA = 5V OUT COUT = 10µF 0.001 electrolytic 10mA CBYP = 100pF 0.0001 10 100 1E+31E+4 1k 10k 1E+51E+61E+7 1E+11E+2 100k 1M 10M FREQUENCY (Hz) Noise Performance (Regulator B) 1 100mA 0.1 1mA VOUT = 5V COUT = 10µF 10mA 0.001 electrolytic CBYP = 10nF 0.0001 10 100 1E+31E+4 1E+11E+2 1k 10k 1E+51E+61E+7 100k 1M 10M FREQUENCY (Hz) 0.01 7 100mA 0.1 320 DROPOUT VOLTAGE (mV) 10mA 0.1 Noise Performance (Regulator B) 1 100mA NOISE (µV/ Hz) NOISE (µV/ Hz) 1 10 NOISE (µV/ Hz) 10 MIC5210 Dropout Voltage vs. Output Current 280 240 200 +125°C +25°C 160 120 80 –40°C 40 0 0 40 80 120 160 OUTPUT CURRENT (mA) M9999-090806 Micrel, Inc. MIC5210 Block Diagram September 2006 8 M9999-090806 Micrel, Inc. MIC5210 No-Load Stability The MIC5210 will remain stable and in regulation with no load (other than the internal voltage divider) unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Application Information Enable/Shutdown Forcing EN (enable/shutdown) high (> 2V) enables the regulator. EN is compatible with CMOS logic gates. If the enable/shutdown feature is not required, connect EN to IN (supply input). Dual-Supply Operation 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. Input Capacitor A 1µF capacitor should be placed from IN to GND 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 input. Thermal Considerations Multilayer boards having a ground plane, wide traces near the pads, and large supply bus lines provide better thermal conductivity. The MIC5210-xxBMM (8-pin MSOP) has a thermal resistance of 200°C/W when mounted on a FR4 board with minimum trace widths and no ground plane. Reference Bypass Capacitor BYPB (reference bypass) is connected to the internal voltage reference of regulator B. A 470pF capacitor (CBYP) connected from BYPB to GND quiets this reference, providing a significant reduction in output noise. CBYP reduces the regulator phase margin; when using CBYP, output capacitors of 2.2µF or greater are generally required to maintain stability. The start-up speed of the MIC5210 is inversely proportional to the size of the reference bypass capacitor. Applications requiring a slow ramp-up of output voltage should consider larger values of CBYP. Likewise, if rapid turn-on is necessary, consider omitting CBYP. If output noise is not a major concern, omit CBYP and leave BYPB open. θJA FR4 200°C/W MSOP Thermal Characteristics For additional heat sink characteristics, please refer to Micrel Application Hint 17, “Calculating P.C. Board Heat Sink Area For Surface Mount Packages”. Thermal Evaluation Examples For example, at 50°C ambient temperature, the maximum package power dissipation is: PD(max) = (125°C – 50°C) / 200°C/W = 375mW If the intent is to operate the 5V version from a 6V supply at the full 150mA load for both outputs in a 50°C maximum ambient temperature, make the following calculation: PD(each regulator) = (VIN – VOUT) × IOUT + (VIN × IGND) = (6V – 5V) × 150mA + (6V × 2.5mA) = 165mW PD(both regulators) = 2 regulators × 165mW = 330mW The actual total power dissipation of 330mW is below the 375mW package maximum, therefore, the regulator can be used. Note that both regulators cannot always be used at their maximum current rating. For example, in a 5V input to 3.3V output application at 50°C, if one regulator supplies 150mA, the other regulator is limited to a much lower current. The first regulator dissipates: PD = (5V – 3.3V) 150 + 2.5mA (5V) PD = 267.5mW Output Capacitor An output capacitor is required between OUT and GND to prevent oscillation. The minimum size of the output capacitor is dependent upon whether a reference bypass capacitor is used. 1.0µF minimum is recommended when CBYP is not used (see Figure 2). 2.2µF minimum is recommended when CBYP is 470pF (see Figure 1). Larger values improve the regulator’s transient response. The output capacitor value may be increased without limit. The output capacitor should have an ESR (effective series resistance) of about 5Ω or less and a resonant frequency above 1MHz. Ultralow-ESR capacitors may cause a low-amplitude oscillation and/or underdamped transient response. Most tantalum or aluminum electrolytic capacitors are adequate; film types will work, but are more expensive. Since many aluminum electrolytic capacitors have electrolytes that freeze at about –30°C, solid tantalum capacitors are recommended for operation below –25°C. 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 1mA. September 2006 PC Board Dielectric 9 M9999-090806 Micrel, Inc. MIC5210 Then, the load that the remaining regulator can dissipate must not exceed: 375mW – 267.5mW = 107.5mW This means, using the same 5V input and 3.3V output voltage, the second regulator is limited to about 60mA. September 2006 Taking advantage of the extremely low-dropout voltage characteristics of the MIC5210, power dissipation can be reduced by using the lowest possible input voltage to minimize the input-to-output voltage drop. 10 M9999-090806 Micrel, Inc. MIC5210 Package Information 8-Pin MSOP (MM) 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 The 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. © 2003 Micrel, Incorporated. September 2006 11 M9999-090806