MIC5387 Ultra-Small Triple 150mA Output LDO General Description Features The MIC5387 is an advanced, general-purpose, triple linear regulator offering high power supply rejection (PSRR) in an ultra-small, 6-pin, 1.6mm x 1.6mm Thin MLF® package. The MIC5387 is capable of 150mA from each output and offers high PSRR, making it an ideal solution for any portable electronic application. Ideal for battery powered applications, the MIC5387 offers 2% initial accuracy, low dropout voltage (180mV @ 150mA), and low ground current (typically 32µA per output). The MIC5387 is available in a lead-free (RoHS compliant) 1.6mm x 1.6mm 6-pin Thin MLF® occupying only 2.56mm2 of PCB area, a 36% reduction in board area compared to a 2mm x 2mm Thin MLF® package. The MIC5387 has an operating junction temperature range of −40°C to +125°C. Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com. • • • • • • • • Input voltage range: 2.5V to 5.5V 150mA guaranteed output current for each output Stable with ceramic output capacitors Low dropout voltage: 180mV @ 150mA Excellent Load/Line Transient Response Low quiescent current: 32µA per LDO High PSRR: 70dB High output accuracy – ±2% initial accuracy • Thermal-shutdown and current-limit protection • Available in a tiny 6-pin 1.6mm x 1.6mm Thin MLF® Applications • • • • Mobile phones Digital cameras GPS, PDAs, PMP Portable electronics ___________________________________________________________________________________________________________ Typical Application MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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 April 2010 M9999-041610-A Micrel, Inc. MIC5387 Ordering Information Part Number Marking Code VOUT1 VOUT2 VOUT3 Temperature Range Package MIC5387-SGFYMT 8A7 3.3V 1.8V 1.5V −40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® MIC5387-SG4YMT 8B7 3.3V 1.8V 1.2V −40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® MIC5387-GMGYMT 8C7 1.8V 2.8V 1.8V −40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® MIC5387-GMMYMT 8D7 1.8V 2.8V 2.8V −40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® Notes: 1. Other voltages available. Contact Micrel for details. ® 2. MLF ▲ = Pin 1 identifier. ® 3. MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. Pin Configuration 6-Pin 1.6mm x 1.6mm Thin MLF® (MT) Pin Description Pin Number Pin Names 1 GND Ground for LDO1, 2 and 3. 2 VIN Input supply for LDO1, 2 and 3. 3 EN2/3 Enable Input 2/3: Enables LDO2 AND LDO3, Active High. High = ON; Low = OFF. Do not leave floating. 4 OUT3 Output Voltage for LDO3. 5 OUT2 Output Voltage for LDO2. 6 OUT1 EP HS Pad April 2010 Pin Function Output Voltage for LDO1. Exposed Heastsink Pad (connect to Ground plane for best thermal). 2 M9999-041610-A Micrel, Inc. MIC5387 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) ........................................ −0.3V to +6V Enable Voltage (VEN2/3)...................................... −0.3V to VIN Power Dissipation (PD) ........................... Internally Limited(3) Lead Temperature (soldering, 10sec)........................ 260°C Junction Temperature (TJ) ........................ −40°C to +150°C Storage Temperature (Ts) ......................... −65°C to +150°C ESD Rating(4) .................................................................. 2kV Supply Voltage (VIN)......................................... 2.5V to 5.5V Enable Voltage (VEN2/3) .......................................... 0V to VIN Junction Temperature (TJ) ........................ −40°C to +125°C Junction Thermal Resistance 6-Pin 1.6mm x 1.6mm Thin MLF® (θJA) ..........92.4°C/W Electrical Characteristics(5) VIN = VEN2/3 = VOUT + 1V; highest of the three outputs; CIN = COUT1 = COUT2 = COUT3 = 1µF; IOUT1 = IOUT2 = IOUT3 = 100µA; TJ = 25°C, bold values indicate −40°C to +125°C, unless noted. Parameter Output Voltage Accuracy Line Regulation (6) Load Regulation Dropout Voltage(7) Ground Pin Current (8) Ripple Rejection Condition Min. Variation from nominal VOUT Variation from nominal VOUT; −40°C to +125°C Typ. Max. Units –2.0 +2.0 % –3.0 +3.0 % 0.3 % VIN = VOUT +1V to 5.5V; IOUT = 100µA 0.02 IOUT = 100µA to 150mA 0.65 % IOUT = 50mA; VOUT ≥ 2.8V 55 110 mV IOUT = 150mA; VOUT ≥ 2.8V 155 310 mV IOUT = 50mA; VOUT < 2.8V 60 135 mV IOUT = 150mA; VOUT < 2.8V 180 380 mV IOUT = 0mA; VEN2/3 = 0V , VOUT1 = On 32 40 µA IOUT = 0mA; VOUT > 1.3V VEN2/3 = VIN 96 120 µA f = up to 1kHz; COUT = 1µF; VOUT < 2.5V 70 dB f = 1kHz − 10kHz; COUT = 1µF; VOUT < 2.5V 60 dB Current Limit VOUT = 0V Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 200 325 550 200 mA µVRMS Enable Input Enable Input Voltage (VEN2/3) Enable Input Current (VEN2/3) Turn-on Time (VOUT2, VOUT3) 0.2 Logic Low 1.2 Logic High V VIL ≤ 0.2V 0.01 VIH ≥ 1.2V COUT = 1µF; IOUT = 150mA V 1 µA 0.01 1 µA 50 125 µs Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(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. 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF. 5. Specification for packaged product only. 6. Regulation is measured at constant junction temperature using low duty cycle pulse testing, changes in output voltage due to heating effects are covered by the thermal regulation specification. 7. 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. For outputs below 2.5V, dropout voltage is the input-to-output differential with the minimum input voltage 2.5V. 8. Ground-pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground-pin current. April 2010 3 M9999-041610-A Micrel, Inc. MIC5387 Typical Characteristics DROPOUT VOLTAGE (mV) IOUT =100µA -80 -70 -50 IOUT =150mA -40 -30 -20 VOUT =1.5V -10 COUT =1µF 0 10 100 1000 10000 100000 VOUT1=3.3V Ground Current (VOUT1=3.3V) vs. Supply Voltage 50mA 34 32 VEN2/3=0V 30 VOUT =3.3V 100µA CIN=COUT1=1µF Single Output 28 26 2.5 2.8 3.1 3.4 3.7 40 4 VIN=VEN2/3=4.3V VOUT1=3.3V 50mA 100µA 90 VOUT2=1.8V VOUT3=1.5V 85 CIN=COUT1=COUT2 =COUT3 =1µF 80 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 2.5 2.8 3.1 3.4 3.7 4 4.3 4.6 4.9 5.2 5.5 SUPPLY VOLTAGE (V) Output Voltage (VOUT1=3.3V) vs. Supply Voltage 20 40 60 80 100 120 TEMPERATURE(°C) 150mA VIN=4.3V VOUT =3.3V CIN=COUT1=1µF 0 20 40 60 80 100 120 TEMPERATURE(°C) Output Voltage (VOUT3=1.5V) vs. Supply Voltage 1.6 1.9 100µA 50mA -40 -20 Output Voltage (VOUT2=1.8V) vs. Supply Voltage 3.5 0 Ground Current (VOUT1=3.3V) vs. Temperature 150mA 95 4.3 4.6 4.9 5.2 5.5 10mA -40 -20 40 60 80 100 120 140 160 OUTPUT CURRENT (mA) 105 100 50mA 60 20 110 SUPPLY VOLTAGE(V) 3.2 OUTPUT VOLTAGE (V) 3.3 50mA 3.1 3.0 2.9 150mA 2.8 2.7 CIN=COUT1=1µF 2.6 VOUT =3.3V 3 3.5 4 4.5 SUPPLY VOLTAGE (V) 1.8 150mA 5 2.5 5.5 50mA 1.2 VEN2/3=VIN VOUT =1.2V 3.5 4 4.5 SUPPLY VOLTAGE (V) April 2010 5 1.5 ` 150mA VEN2/3=VIN 1.45 VOUT =1.5V CIN=COUT3=1µF 3 3.5 4 4.5 5 5.5 1.4 5.5 2.5 3 3.5 4 4.5 5 SUPPLY VOLTAGE (V) 2 3.4 1.8 3.3 3.2 3.1 VIN=4.3V VOUT =3.3V CIN=COUT1 =1µF 1.6 1.4 VIN=VEN2/3=2.8V VOUT =1.8V 1.2 CIN=COUT2=1µF IOUT2 =150mA 1 3 -40 -20 5.5 Output Voltage (VOUT2=1.8V) vs. Temperature 3.5 IOUT1=150mA 1.1 3 50mA 1mA Output Voltage (VOUT1=3.3V) vs. Temperature CIN=COUT3=1µF 2.5 1.55 SUPPLY VOLTAGE (V) OUTPUT VOLTAGE (V) 1.25 1.15 VOUT =1.8V 1.7 1.3 150mA VEN2/3 =VIN 50mA 1.75 Output voltage (VOUT3=1.2V) vs. Supply Voltage 1mA 1mA CIN=COUT2 =1µF 2.5 2.5 1.85 OUTPUT VOLTAGE (V) 100µA 3.4 OUTPUT VOLTAGE (V) 80 GROUND CURRENT ( µA) GROUND CURRENT (µA) GROUND CURRENT(µA) 36 100mA 100 Ground Current (All VOUTs) vs. Supply Voltage 115 150mA 120 120 38 OUTPUT VOLTAGE (V) 140 0 20 FREQUENCY(Hz) 150mA CIN=COUT1=1µF 160 CIN=COUT1=1µF 0 40 VOUT1=3.3V 180 OUTPUT VOLTAGE (V) dB -60 200 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 DROPOUT VOLTAG (mV) -100 -90 Dropout Voltage vs. Temperature Dropout Voltage vs. Output Current Power Supply Rejection Ratio (PSRR) 0 20 40 60 80 TEMPERATURE(°C) 4 100 120 -40 -20 0 20 40 60 80 100 120 TEMPERATURE(°C) M9999-041610-A Micrel, Inc. MIC5387 Typical Characteristics (Continued) Output Voltage (VOUT3=1.5V) vs. Temperature 1.4 1.7 Current Limit vs. InputVoltage Output Voltage (VOUT=1.2V) vs. Temperature 380 1.6 1.5 VIN=VEN2/3=2.5V 1.4 VOUT =1.5V 1.3 1.2 1.1 CIN=COUT3=1µF VIN=VEN2/3=2.5V VOUT =1.2V 0 20 320 VOUT2=1.8V 300 VEN2/3 =VIN CIN=COUT1=COUT2 =COUT3 =1µF 1 1.3 -40 -20 VOUT3=1.5V 340 CIN=COUT3=1µF IOUT3 =150mA 40 60 80 280 -40 100 120 -20 0 20 40 60 80 100 120 TEMPERATURE(°C) TEMPERATURE(°C) Output Noise Spectral Density 2 2.5 3 3.5 4 4.5 INPUT VOLTAGE (V) 5 5.5 Output Noise SpectralDensity 1 1 0.1 NOISE uV/√Hz NOISE uV/√Hz CURRENT LIMIT (mA) OUTPUT VOLTAGE (V) OUTPUT VOLTAG (V) VOUT1=3.3V 360 VIN=VEN2/3=5V VOUT3 =1.5V 0.01 COUT3=1µF 0.1 VIN =VEN2/3=5V VOUT3=1.5V COUT3=1µF IOUT3=100µA OUTPUT VOLTAGE NOISE=152µVrms IOUT3=150mA OUTPUT VOLTAGE NOISE=125uVrms 0.001 0.01 10 100 1,000 10,000 FREQUENCY (Hz) April 2010 100,000 10 100 1,000 10,000 FREQUENCY (Hz) 5 100,000 M9999-041610-A Micrel, Inc. MIC5387 Functional Characteristics April 2010 6 M9999-041610-A Micrel, Inc. MIC5387 Block Diagram April 2010 7 M9999-041610-A Micrel, Inc. MIC5387 Enable/Shutdown The MIC5387 comes with an active-high enable (EN2/3) pin that allows the regulator to be disabled for outputs 2 and 3. Forcing the enable pin high enables the output voltage. The active-high enable pin uses CMOS technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. The output OUT1 does not have an enable pin and is always enabled when VIN is above the minimum supply voltage of 2.5V. Application Information MIC5387 is a triple-output, low-noise 150mA LDO. The MIC5387 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Input Capacitor The MIC5387 is a high-performance, high-bandwidth device. An input capacitor of 1µF is required from the input-to-ground to provide stability. Low-ESR ceramic capacitors provide optimal performance at a minimum of space. Additional high-frequency capacitors – such as small-valued NPO dielectric-type capacitors – help filter out high-frequency noise and are good practice in any RF-based circuit. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are, therefore, not recommended. Thermal Considerations The MIC5387 is designed to provide three outputs up to 150mA each of continuous current in a very small package. Maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. For example, if the input voltage is 3.3V and the output voltages are 1.8V, 2.8V and 2.8V each with an output current = 150mA. The actual power dissipation of the regulator circuit can be determined using the equation: Output Capacitor The MIC5387 requires an output capacitor of 1µF or greater for each output to maintain stability. The design is optimized for use with low-ESR ceramic chip capacitors. High-ESR capacitors are not recommended because they may cause high-frequency oscillation. The output capacitor can be increased, but performance has been optimized for a 1µF ceramic output capacitor and does not improve significantly with larger capacitance. X7R/X5R dielectric-type ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by 15% over their operating temperature range and are the most stable type of ceramic capacitors. Z5U and Y5V dielectric capacitors change value by as much as 50% and 60%, respectively, over their operating temperature ranges. To use a ceramic chip capacitor with Y5V dielectric, the value must be much higher than an X7R ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. PD = (VIN − VOUT1) I OUT1 + (VIN − VOUT2) I OUT2 + (VIN − VOUT3) I OUT3 + VIN IGND As the MIC5387 is a CMOS device, the ground current is typically <100µA over the load range, the power dissipation contributed by the ground current is <1% and may be ignored for this calculation: PD = (3.3V − 1.8V)150mA + (3.3V-2.8V)150mA + (3.3V − 2.8V)150mA PD = 0.375W To determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation: ⎛ TJ(MAX) − TA ⎞ ⎟ ⎝ θJA ⎠ PD(MAX) = ⎜ No-Load Stability Unlike many other voltage regulators, the MIC5387 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. April 2010 TJ(MAX) = 125°C, the maximum junction temperature of the die, and θJA thermal resistance = 92.4°C/W for the Thin MLF® package. 8 M9999-041610-A Micrel, Inc. MIC5387 Therefore, the maximum ambient operating temperature of 90.35°C is allowed in a 1.6mm x 1.6mm thin MLF® package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the “Regulator Thermals” section of Micrel’s Designing with Low-Dropout Voltage Regulators handbook. This information can be found on Micrel's website at: http://www.micrel.com/_PDF/other/LDOBk_ds.pdf Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5387-SGFYMT at an input voltage of 3.3V and 450mA load with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.375W = (125°C − TA) / (92.4°C/W) TA = 90.35°C April 2010 9 M9999-041610-A Micrel, Inc. MIC5387 Typical Application Bill of Materials Item Part Number C1,C2,C3,C4 C1005X5R1A105K U1 MIC5387-xxxYMT Manufacturer (1) TDK Micrel, Inc.(2) Description Qty. Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 4 Ultra-Small Triple 150mA Output LDO 1 Notes: 1. TDK: www.tdk.com 2. Micrel, Inc.: www.micrel.com April 2010 10 M9999-041610-A Micrel, Inc. MIC5387 PCB Layout Recommendations (1.6mm x 1.6mm Thin MLF®) Top Layer Bottom Layer April 2010 11 M9999-041610-A Micrel, Inc. MIC5387 Package Information 6-Pin 1.6mm x 1.6mm Thin MLF® (MT) 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. © 2010 Micrel, Incorporated. April 2010 12 M9999-041610-A