MIC5385 Ultra Small Triple 150mA Output LDO General Description Features The MIC5385 is an advanced general purpose triple linear regulator offering high power supply rejection (PSRR) in an ultra-small 2mm x 2mm 8 pin Thin MLF® package. The MIC5385 is capable of sourcing 150mA for each output and offers high PSRR making it an ideal solution for any portable electronic application. Ideal for battery powered applications, the MIC5385 offers 2% initial accuracy, low dropout voltage (180mV @ 150mA), and low ground current (typically 32µA per output). The MIC5385 can also be put into a zero-off-mode current state, drawing virtually no current when disabled. The MIC5385 is available in a lead-free (RoHS compliant) 2mm x 2mm 8 pin Thin MLF® occupying only 4mm2 of PCB area, a 33% reduction in board area compared to a 3mm x 2mm Thin MLF® package. The MIC5385 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 tiny 2mm x 2mm Thin MLF® Applications • • • • Mobile phones Digital cameras GPS, PDAs, PMP, handhelds 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 December 2009 M9999-122109-A Micrel, Inc. MIC5385 Ordering Information Part Number Marking Code VOUT1 VOUT2 VOUT3 Temperature Range Package ZN1 3.3V 1.8V 1.5V –40°C to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5385-SGFYMT 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 8-Pin 2mm x 2mm Thin MLF® (MT) Pin Description Pin Number Pin Names 1 EN3 Pin Function Enable Input 3: Enables LDO3, Active High. High = ON; Low = OFF. Do not leave floating. 2 IN 3 EN2 Enable Input 2: Enables LDO2, Active High. High = ON; Low = OFF. Do not leave floating. 4 EN1 Enable Input 1: Enables LDO1, Active High. High = ON; Low = OFF. Do not leave floating. 5 OUT2 Output Voltage for LDO2. 6 OUT1 Output Voltage for LDO1. 7 OUT3 Output Voltage for LDO3. 8 GND Ground for LDO1, 2 and 3. EP HS Pad December 2009 Input supply for LDO1, 2 and 3. Exposed Heastsink Pad. (connect to Ground plane for best thermal). 2 M9999-122109-A Micrel, Inc. MIC5385 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) ........................................... -0.3V to 6V Enable Voltage (VEN)..........................................-0.3V to VIN Power Dissipation (PD) ........................... Internally Limited(3) Lead Temperature (soldering, 3µsec)........................ 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 (VEN).............................................. 0V to VIN Junction Temperature (TJ) ........................ –40°C to +125°C Junction Thermal Resistance 2mm x 2mm Thin MLF® (θJA).............................90°C/W Electrical Characteristics(5) VIN = VEN1 = VEN2 = VEN3 = 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 Condition Min Output Voltage Accuracy Variation from nominal VOUT –2.0 Variation from nominal VOUT; –40°C to +125°C –3.0 Line Regulation Load Regulation(6) (7) Dropout Voltage Ground Pin Current (8) Typ VIN = VOUT +1V to 5.5V; IOUT = 100µA 0.02 IOUT = 100µA to 150mA 0.65 Max Units +2.0 % +3.0 % 0.3 % % 110 IOUT = 50mA; VOUT ≥ 2.8V 55 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; VOUT > 1.3V, Single output enabled 32 IOUT = 0mA; VOUT > 1.3V, VEN1=VEN2= VEN3 ≥ 1.2V 96 120 µA 0.05 1 µA Ground Pin Current in Shutdown VEN1=VEN2= VEN3≤ 0.2V Ripple Rejection f = up to 1kHz; COUT = 1µF; VOUT < 2.5V Current Limit VOUT = 0V Output Voltage Noise COUT = 1µF, 10Hz to 100kHz µA 70 f = 1kHz – 10kHz; COUT = 1µ F; VOUT < 2.5V dB 50 200 325 dB 550 200 mA µVRMS Enable Input 0.2 Enable Input Voltage Logic Low EN1, EN2, EN3 Logic High Enable Input Current VIL ≤ 0.2V 0.01 EN1, EN2, EN3 VIH ≥ 1.2V Turn-on Time COUT = 1µF; IOUT = 150mA 1.2 V 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. December 2009 3 M9999-122109-A Micrel, Inc. MIC5385 Typical Characteristics Power Supply Rejection Ratio 100µA -60 150mA -50 -40 -30 -20 V OUT = 1.5V -10 COUT = 1µF 120 100 80 60 VOUT1 = 3.3V 40 CIN = COUT1 = 1µF 20 100 1000 10000 100000 25 Frequency(Hz) 40 100 125 VIN = VEN2 VEN1 = VEN3 = 0V 150mA 34 VOUT2 = 1.8V 100µA CIN = COUT2 = 1µF 32 30 28 3.5 4 150mA 38 36 VIN = VEN3 VEN1 = VEN2 = 0V 50mA 34 VOUT3 = 1.5V 100µA 32 4.5 5 CIN = COUT3 = 1µF 3 3.5 4 3.5 3.3 Output Voltage (V) 50mA 33 31 VIN = VEN1 = 4.3V 29 VEN2 = VEN3 = 0V VOUT1 = 3.3V COUT1 = 1µF -20 0 20 40 60 80 4.5 5 150mA 3.1 3.0 2.9 2.8 VEN1 = VIN 2.7 CIN = COUT1 = 1µF 2.6 VOUT1 = 3.3V VIN = VEN1 = VEN2 = VEN3 100 2.5 3 3.5 4 4.5 5 VIN = VEN1 = VOUT1+1V CIN = COUT1 = 1µF 3.5 4 4.5 Supply Voltage (V) December 2009 5 5.5 5.5 VEN2 = VIN 1.75 150mA VOUT2 = 1.8V 50mA 2.5 3 3.5 4 4.5 5 5.5 Supply Voltage (V) Output Voltage vs Temperature (VOUT = 1.8V) 2.2 2 1.8 VIN = VEN2 = VOUT2+1V 1.6 VOUT2 = 1.8V CIN = COUT2 = 1µF IOUT2 = 150mA 3 3 5 1mA IOUT1 = 150mA 1.4 4.5 1.8 5.5 VOUT1 = 3.3V 3.1 4 CIN = COUT2 = 1µF 3.3 3.2 3.5 1.85 Output Voltage (V) Output Voltage(V) VOUT3 = 1.5V 2.5 3 1.9 Output Voltage vs Temperature (VOUT = 3.3V) CIN = COUT3 = 1µF 150mA VOUT3 = 1.5V CIN = COUT1 = COUT2 = COUT3 = 1µF Output Voltage vs Supply Voltage (VOUT = 1.8V) 3.4 VEN3 = VIN 50mA 100µA 95 3.5 1.45 VOUT1 = 3.3V, VOUT2 = 1.8V, 1.7 2.5 Output Voltage vs Supply Voltage (VOUT = 1.5V) 1.5 100 120 150mA 105 Supply Voltage (V) 1mA 80 Supply Voltage(V) 100µA Temperature(°C) 1.55 60 110 5.5 3.2 100 120 1.6 40 50mA 115 2.5 25 20 50mA 3.4 37 -40 0 120 Output Voltage vs. Supply Voltage (VOUT = 3.3V) 150mA 27 -20 Supply Voltage(V) 41 100µA 10mA 90 2.5 Ground Current vs Temperature (single output) 35 40 Ground Current vs Supply Voltage (All outputs) 28 5.5 Supply Voltage(V) 39 60 Temperature (°C) Output Voltage (V) 3 50mA 80 -40 30 2.5 100 150 Ground Current (µA) 50mA Ground Current (µA) Ground Current (µA) 75 42 38 Ground Current (µA) 50 Ground Current vs Supply Voltage (single output) 42 36 100mA 120 Output Current (mA) Ground Current vs Supply Voltage (single output) 40 140 0 0 1000000 160 20 0 0 10 Dropout Voltage (mV) Dropout Voltage (mV) -70 150mA 180 140 -80 Gain (dB) 200 160 -90 Output Voltage (V) Dropout Voltage vs Temperature Dropout Voltage vs Output Current -100 1.4 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature (°C) 4 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature (°C) M9999-122109-A Micrel, Inc. MIC5385 Typical Characteristics (Continued) Output Voltage vs Temperature (VOUT = 1.5V) Current Limit vs. Input Voltage V EN1 = VEN2 = V EN3 = VIN 440 Current Limit (mA) Output Voltage(V) 1.6 1.5 VIN = VEN3 = VOUT3+1V VOUT3 = 1.5V 1.4 CIN = COUT3 = 1µF -40 -20 0 20 CIN = COUT1 = COUT2 = COUT3 = 1µF 420 400 V OUT3 = 1.5V 380 360 340 40 60 80 100 120 Temperature (°C) 0.1 V IN = VEN3 = 5.38V V OUT3 = 1.5V COUT3 = 1µF 0.01 IOUT3 = 100µA Output VoltageNoise=152µVrms VOUT2 = 1.8V VOUT1 = 3.3V 320 IOUT3 = 150mA 1.3 Output Noise Spectral Density 1 460 Noise µV/√Hz 1.7 300 0.001 2 3 4 Input Voltage (V) 5 6 10 100 1,000 10,000 100,000 1,000,000 Frequency (Hz) Output Noise Spectral Density Noise µV/√Hz 1 VIN = VEN3 = 5.36V 0.1 VOUT3 = 1.5V COUT3 = 1µF IOUT3 = 150mA Output voltage Noise = 127µVrms 0.01 10 100 1,000 10,000 100,000 1,000,000 Frequency (Hz) December 2009 5 M9999-122109-A Micrel, Inc. MIC5385 Functional Characteristics December 2009 6 M9999-122109-A Micrel, Inc. December 2009 MIC5385 7 M9999-122109-A Micrel, Inc. MIC5385 Block Diagram December 2009 8 M9999-122109-A Micrel, Inc. MIC5385 Application Information Enable/Shutdown The MIC5385 comes with an active-high enable pin that allows the regulator to be disabled. Forcing the enable pin low disables the regulator and sends it into 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 uses CMOS technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. MIC5385 is a triple output Low noise 150mA LDO. The MIC5385 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Input Capacitor The MIC5385 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 MIC5385 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 3.6V and the output voltages are 3.3V,1.8V, and 1.5V each with an output current = 150mA. The actual power dissipation of the regulator circuit can be determined using the equation: Output Capacitor The MIC5385 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 OUT + VIN IGND As the MIC5385 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 = (3.6V – 3.3V)150mA+(3.6V-1.8V)150mA+ (3.6V-1.5V)150mA PD = 0.63W 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 PD(max) = ⎜⎜ θ JA ⎝ No-Load Stability Unlike many other voltage regulators, the MIC5385 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. December 2009 ⎞ ⎟ ⎟ ⎠ TJ(max) = 125°C, the maximum junction temperature of the die, and θJA thermal resistance = 90°C/W for the Thin MLF® package. 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. 9 M9999-122109-A Micrel, Inc. MIC5385 For example, when operating the MIC5385-SGFYMT at an input voltage of 3.6V and 450mA load with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.63W = (125°C – TA)/(90°C/W) TA = 68.3°C/W December 2009 Therefore, the maximum ambient operating temperature of 68.3°C is allowed in a 2mm x 2mm 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 10 M9999-122109-A Micrel, Inc. MIC5385 Typical Application Bill of Materials Item Part Number C1,C2,C3,C4 C1005X5R1A105K U1 MIC5385-SGFYMT Manufacturer (1) TDK Micrel, Inc.(2) Description Qty. Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 4 High Performance Triple 150mA LDO 1 Notes: 1. TDK: www.tdk.com 2. Micrel, Inc.: www.micrel.com December 2009 11 M9999-122109-A Micrel, Inc. MIC5385 PCB Layout Recommendations (2mm x 2mm Thin MLF®) Top Layer Bottom Layer December 2009 12 M9999-122109-A Micrel, Inc. MIC5385 Package Information 8-Pin 2mm x 2mm 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. © 2009 Micrel, Incorporated. December 2009 13 M9999-122109-A