MIC5512/14 Single 300mA LDO in 1.6mm × 1.6mm Thin DFN Package General Description Features The MIC5512/14 is an advanced general-purpose LDO ideal for powering general-purpose portable devices. The MIC5512/14 family of products provides a highperformance 300mA LDO in an ultra-small 1.6mm x 1.6mm Thin DFN package. The MIC5512 and MIC5514 LDOs include an auto-discharge feature on the output that is activated when the enable pin is low. The MIC5514 have an internal pull down resistor on the enable pin that will disable the output when the enable pin is left floating, this is ideal for applications where the control signal is floating during processor boot up. Ideal for battery-powered applications, the MIC5512/14 offers a typical 1% initial accuracy, low dropout voltage (160mV at 300mA), and low ground current (typically 38µA). The MIC5512/14 can also be put into a zero-offmode current state, drawing virtually no current when disabled. The MIC5512/14 has an operating junction temperature range of –40°C to 125°C. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. • • • • • • • • • Input voltage range: 2.5V to 5.5V Fixed output voltage range: 1.0V to 3.3V 300mA guaranteed output current ±1% initial output accuracy Stable with 1µF ceramic output capacitors Low dropout voltage: 160mV @ 300mA Output discharge circuit Internal enable pull down resistor (MIC5514) Available in ultra-small 6-pin 1.6mm × 1.6mm Thin DFN package Applications • • • • • Smart phones DSCs, GPS, PMPs, and PDAs Medical devices Portable electronics 5V systems 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 April 8, 2013 Revision 1.1 Micrel, Inc. MIC5512/14 Ordering Information Marking Code Output (1) Voltage AutoDischarge EN Pull-down Temperature Range MIC5512-1.2YMT 7E 1.2V YES NO –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN MIC5512-1.8YMT 7D 1.8V YES NO –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN MIC5512-2.8YMT 7C 2.8V YES NO –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN MIC5512-3.3YMT 7A 3.3V YES NO –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN MIC5514-1.2YMT B8 1.2V YES YES –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN MIC5514-1.8YMT B7 1.8V YES YES –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN MIC5514-2.8YMT A9 2.8V YES YES –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN MIC5514-3.0YMT A8 3.0V YES YES –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN MIC5514-3.3YMT A7 3.3V YES YES –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin DFN Part Number Package (2,3) Notes: 1. Other voltages are available. Contact Micrel for details. 2. Thin DFN ▲ = Pin 1 identifier. 3. Thin DFN is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. Pin Configuration 6-Pin 1.6mm × 1.6mm Thin DFN (MT) (Top View) Pin Description Pin Number Pin Name 1 EN Enable Input: Active High. High = ON; Low = OFF. MIC5512 do not leave floating. MIC5514 has an internal 4MΩ pull down resistor and will disable VOUT when EN is floating. 2, 5 NC Not Connected. 3 VIN Input Supply. 4 VOUT Output Voltage. When disabled the MIC5512/14 switches in an internal 25Ω load to discharge the external capacitors. 6 GND Ground. EP ePad Exposed Heatsink Pad. Connect to GND for best performance. April 8, 2013 Pin Function 2 Revision 1.1 Micrel, Inc. MIC5512/14 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) .......................................... –0.3V to 6V Enable Voltage (VEN). ........................................ –0.3V to VIN (3) Power Dissipation (PD) ........................... Internally Limited Lead Temperature (soldering, 10s) ............................ 260°C Junction Temperature (TJ) ........................ –40°C to +150°C Storage Temperature (Ts) ......................... –65°C to +150°C (4) ESD Rating .................................................................. 3kV 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 1.6mm × 1.6mm Thin DFN-6 (θJA) .................. 92.4°C/W Electrical Characteristics(5) VIN = VEN = VOUT + 1V; CIN = COUT = 1µF; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted. Parameter Output Voltage Accuracy Line Regulation Min. Typ. Max. Variation from nominal VOUT –2.0 ±1 +2.0 Variation from nominal VOUT; –40°C to +125°C –3.0 VIN = VOUT +1V to 5.5V; IOUT = 100µA Load Regulation Dropout Voltage Condition (6) Ground Pin Current 0.02 IOUT = 100µA to 300mA (7) (8) Ground Pin Current in Shutdown +3.0 Units % 0.3 %/V 8 40 mV IOUT = 150mA IOUT = 300mA 80 160 190 380 mV IOUT = 0mA IOUT = 300mA 38 42 55 65 µA 0.05 1 µA 900 mA VEN = 0V Ripple Rejection f = 1kHz; COUT = 1µF Current Limit VOUT = 0V 65 Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 175 µVRMS Auto-Discharge NFET Resistance VEN = 0V; VIN = 3.6V; IOUT = –3mA 25 Ω MIC5514 Only 4 MΩ 400 630 dB Enable Input Enable Pull-Down Resistor Enable Input Voltage Enable Input Current MIC5512 Enable Input Current MIC5514 Turn-On Time 0.2 Logic Low 1.2 Logic High VEN = 0V 0.01 1 VEN = 5.5V 0.01 1 VEN = 0V 0.01 1 VEN = 5.5V 1.4 2 COUT = 1µF; IOUT = 150mA 50 125 V µA µA 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 are 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 8, 2013 3 Revision 1.1 Micrel, Inc. MIC5512/14 Typical Characteristics -100 IOUT = 100mA -60 -50 -40 IOUT = 300mA -30 COUT = 1µF CIN = 1µF VIN = 3.8V VOUT = 2.8V -20 -10 0 10 10 100 1k 1,000 120 100 80 60 40 VOUT = 3.3V CIN = COUT = 1µF 20 0 50 GROUND CURRENT (µA) 300mA 40 100µA 30 VEN = VIN VOUT = 3.3V CIN = COUT = 1µF 100 4.0 4.5 50mA 40 20 150 200 250 300 -40 -20 5.0 50 48 44 43 42 41 40 39 38 VIN = VEN = VOUT + 1V VOUT = 3.3V CIN = COUT = 1µF 40 60 80 100 120 300mA 46 44 42 50mA 40 150mA 38 100µA 36 VIN = VEN = VOUT + 1V VOUT = 3.3V CIN = COUT = 1µF 34 32 30 0 50 100 150 200 250 300 -40 -20 Output Voltage vs. Output Current 0 20 40 60 80 100 120 TEMPERATURE (°C) LOAD CURRENT (mA) Output Voltage vs. Supply Voltage 3.50 20 Ground Current vs. Temperature 36 5.5 SUPPLY VOLTAGE (V) Output Voltage vs. Temperature 3.5 3.50 3.4 3.40 3.35 3.30 3.25 VIN = VEN = VOUT+ 1V VOUT = 3.3V CIN = COUT = 1µF 3.20 3.15 3.45 3.3 50mA 3.2 3.1 3.0 150mA 2.9 2.8 300mA VIN = VEN VOUT = 3.3V CIN = COUT = 1µF 2.7 2.6 3.10 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 3.45 OUTPUT VOLTAGE (V) 0 TEMPERATURE (°C) 45 20 3.5 60 46 37 3.0 150mA 80 Ground Current vs. Load Current 50 2.5 100 OUTPUT CURRENT (mA) Ground Current vs. Supply Voltage 25 VOUT = 3.3V CIN = COUT = 1µF 120 0 10k 100k 1,000,000 1M 10,000 100,000 35 140 0 FREQUENCY (Hz) 45 300mA 160 GROUND CURRENT (µA) -70 180 140 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) -80 PSRR (dB) 200 160 -90 GROUND CURRENT (µA) Dropout Voltage vs.Temperature Dropout Voltage vs. Output Current Power Supply Rejection Ratio 50 100 150 200 250 OUTPUT CURRENT (mA) April 8, 2013 300 3.35 300mA 3.30 150mA VIN = VOUT+ 1V VOUT = 3.3V CIN = COUT = 1µF 3.25 3.20 2.5 0 3.40 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) 4 5.0 5.5 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) Revision 1.1 Micrel, Inc. MIC5512/14 Typical Characteristics (Continued) Current Limit vs. Supply Voltage 750 CURRENT LIMIT (mA) 700 650 600 550 500 450 400 VOUT = 1.2V CIN = COUT = 1µF 350 300 2.5 3 3.5 4 4.5 5 5.5 SUPPLY VOLTAGE (V) April 8, 2013 5 Revision 1.1 Micrel, Inc. MIC5512/14 Functional Characteristics April 8, 2013 6 Revision 1.1 Micrel, Inc. MIC5512/14 Block Diagram MIC55xx Block Diagram April 8, 2013 7 Revision 1.1 Micrel, Inc. MIC5512/14 Forcing the enable pin high enables the output voltage. The MIC5512 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 MIC5514 has an internal pull down resistor on the enable pin to disable the output when the enable pin is floating. Application Information MIC5512/14 are high performance 300mA LDOs. The MIC5512/14 includes an auto-discharge circuit that is switched on when the regulator is disabled through the enable pin. The MIC5512/14 regulators are fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Thermal Considerations The MIC5512/14 is designed to provide 300mA 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, the output voltage is 2.8V, and the output current = 300mA. The actual power dissipation of the regulator circuit can be determined using Equation 1: Input Capacitor The MIC5512/14 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. PD = (VIN – VOUT1) I OUT + VIN IGND Because this device is CMOS and the ground current is typically <100µA over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for Equation 2: Output Capacitor The MIC5512/14 requires an output capacitor of 1µF or greater 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. PD = (3.6V – 2.8V) × 300mA PD = 0.240W 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. Eq. 2 To determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and Equation 3: TJ(MAX) − TA PD(MAX) = θ JA Eq. 3 TJ(MAX) = 125°C, the maximum junction temperature of the die, θJA thermal resistance = 92.4°C/W for the DFN package. No-Load Stability Unlike many other voltage regulators, the MIC5512/14 remains stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. Substituting PD for PD(MAX) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The junction-toambient thermal resistance for the minimum footprint is 92.4°C/W. The maximum power dissipation must not be exceeded for proper operation. Enable/Shutdown The MIC5512/14 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 an off mode current state drawing virtually zero current. When disabled the MIC5512/14 switches an internal 25Ω load on the regulator output to discharge the external capacitor. April 8, 2013 Eq. 1 8 Revision 1.1 Micrel, Inc. MIC5512/14 For example, when operating the MIC5512-MYMT at an input voltage of 3.6V and 300mA load with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as in Equation 4: 0.240W = (125°C – TA)/(92.4°C/W) TA = 102.8°C Eq. 4 Therefore, the maximum ambient operating temperature allowed in a 1.6mm × 1.6mm DFN package is 102.8°C. 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 April 8, 2013 9 Revision 1.1 Micrel, Inc. MIC5512/14 Typical Application Schematic Bill of Materials Item C1, C2 U1 Part Number GRM155R61A105KE15D MIC5512-xxYMT MIC5514-xxYMT Manufacturer Murata (1) (2) Micrel, Inc. Description Qty. 1µF Ceramic Capacitor, 10V, X5R, Size 0402 2 Single 300mA LDO in 1.6mm × 1.6mm Thin DFN Package 1 Notes: 1. Murata: www.murata.com. 2. Micrel, Inc.: www.micrel.com. April 8, 2013 10 Revision 1.1 Micrel, Inc. MIC5512/14 PCB Layout Recommendations Top Layer Bottom Layer April 8, 2013 11 Revision 1.1 Micrel, Inc. MIC5512/14 Package Information(1) and Recommended Landing Pattern 6-Pin 1.6mm × 1.6mm Thin DFN (MT) Note: 1. 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. April 8, 2013 12 Revision 1.1