MIC5310 Dual 150mA µCap LDO in 2mm x 2mm MLF® General Description Features The MIC5310 is a tiny Dual Ultra Low Dropout (ULDO™) linear regulator ideally suited for portable electronics due to its high power supply ripple rejection (PSRR) and ultra low output noise. The MIC5310 integrates two high-performance 150mA ULDOs into a tiny 2mm x 2mm leadless MLF® package, which provides exceptional thermal package characteristics. The MIC5310 is a µCap design which enables operation with very small ceramic output capacitors for stability, thereby reducing required board space and component cost. The combination of extremely low-drop-out voltage, high power supply rejection and exceptional thermal package characteristics makes it ideal for powering RF/noise sensitive circuitry, cellular phone camera modules, imaging sensors for digital still cameras, PDAs, MP3 players and WebCam applications The MIC5310 ULDO™ is available in fixed-output ® voltages in the tiny 8-pin 2mm x 2mm leadless MLF package which occupies less than half the board area of a single SOT-6 package. Additional voltage options are available. For more information, contact Micrel marketing department. Data sheets and support documentation are found on the Micrel web site www.micrel.com. • • • • • • • • • • • • 2.3V to 5.5V input voltage range Ultra-low dropout voltage ULDO™ 35mV @ 150mA High PSRR - >70dB @ 1KHz Ultra-low output noise: 30µVRMS ±2% initial output accuracy Tiny 8-pin 2mm x 2mm MLF® leadless package Excellent Load/Line transient response Fast start up time: 30µs µCap stable with 1µF ceramic capacitor Thermal shutdown protection Low quiescent current: 75µA per output Current limit protection Applications • • • • • • Mobile phones PDAs GPS receivers Portable electronics Portable media players Digital still and video cameras Typical Application ULDO is a trademark of Micrel, Inc. 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 March 2011 M9999-032411-C Micrel, Inc. MIC5310 RF Power Supply Circuit Block Diagram MIC5310 Fixed Block Diagram March 2011 2 M9999-032411-C Micrel, Inc. MIC5310 Ordering Information Junction Temperature Range Package3 1.8V/1.5V –40°C to +125°C 8-Pin 2x2 MLF® GGZ 1.8V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-GWYML GWZ 1.8V/1.6V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.5/1.8YML MIC5310-JGYML JGZ 2.5V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.5/2.5YML MIC5310-JJYML JJZ 2.5V/2.5V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.6/1.85YML MIC5310-KDYML KDZ 2.6V/1.85 –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.6/1.8YML MIC5310-KGYML KGZ 2.6V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.7/2.7YML MIC5310-LLYML LLZ 2.7V/2.7V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.8/1.5YML MIC5310-MFYML MFZ 2.8V/1.5V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.8/1.8YML MIC5310-MGYML MGZ 2.8V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.8/2.6YML MIC5310-MKYML MKZ 2.8V/2.6V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.8/2.8YML MIC5310-MMYML MMZ 2.8V/2.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.85/1.85YML MIC5310-NDYML NDZ 2.85V/1.85V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.85/2.6YML MIC5310-NKYML NKZ 2.85V/2.6V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.85/2.85YML MIC5310-NNYML NNZ 2.85V/2.85V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.9/1.5YML MIC5310-OFYML OFZ 2.9V/1.5V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.9/1.8YML MIC5310-OGYML OGZ 2.9V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.9/2.9YML MIC5310-OOYML OOZ 2.9V/2.9V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/1.8YML MIC5310-PGYML PGZ 3.0V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/2.5YML MIC5310-PJYML PJZ 3.0V/2.5V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/2.6YML MIC5310-PKYML PKZ 3.0V/2.6V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/2.8YML MIC5310-PMYML PMZ 3.0V/2.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/2.85YML MIC5310-PNYML PNZ 3.0V/2.85V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/3.0YML MIC5310-PPYML PPZ 3.0V/3.0V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/1.5YML MIC5310-SFYML SFZ 3.3V/1.5V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/1.8YML MIC5310-SGYML SGZ 3.3V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/2.5YML MIC5310-SJYML SJZ 3.3V/2.5V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/2.6YML MIC5310-SKYML SKZ 3.3V/2.6V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/2.8YML MIC5310-SMYML SMZ 3.3V/2.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/2.85YML MIC5310-SNYML SNZ 3.3V/2.85V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/2.9YML MIC5310-SOYML SOZ 3.3V/2.9V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/3.0YML MIC5310-SPYML SPZ 3.3V/3.0V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/3.2YML MIC5310-SRYML SRZ 3.3V/3.2V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/3.3YML MIC5310-SSYML SSZ 3.3V/3.3V –40°C to +125°C 8-Pin 2x2 MLF® Functional Part number Ordering Part Number MIC5310-1.8/1.5YML MIC5310-GFYML GFZ MIC5310-1.8/1.8YML MIC5310-GGYML MIC5310-1.8/1.6YML Marking 1 VOUT1/VOUT22 Notes: 1. Over bar symbol ( ¯ ) may not be to scale. Over bar at Pin 1. 2. Other voltage options available. Contact Micrel for more details. 3. MLF® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. March 2011 3 M9999-032411-C Micrel, Inc. MIC5310 Pin Configuration 8-Pin 2mm x 2mm MLF (ML) Top View Pin Description Pin Number Pin Name Pin Function 1 VIN Supply Input. 2 GND Ground 3 BYP Reference Bypass: Connect external 0.1µF to GND to reduce output noise. May be left open when bypass capacitor is not required. 4 EN2 Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off; Do not leave floating. 5 EN1 Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off; Do not leave floating. March 2011 6 NC 7 VOUT2 Regulator Output – LDO2 Not internally connected 8 VOUT1 Regulator Output – LDO1 – EP Exposed Pad. Connect EP to GND. 4 M9999-032411-C Micrel, Inc. MIC5310 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) .....................................0V to +6V Enable Input Voltage (VEN)...........................0V to +6V Power Dissipation...........................Internally Limited(3) Lead Temperature (soldering, 3sec ...................260°C Storage Temperature (TS) ................. -65°C to +150°C ESD Rating(4) .........................................................2kV Supply voltage (VIN)............................... +2.3V to +5.5V Enable Input Voltage (VEN).............................. 0V to VIN Junction Temperature ......................... -40°C to +125°C Junction Thermal Resistance MLF-8 (θJA) ............................................... 90°C/W Electrical Characteristics(5) VIN = EN1 = EN2 = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF; CBYP = 0.1µF; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted. Parameter Conditions Min Output Voltage Accuracy Variation from nominal VOUT Variation from nominal VOUT; –40°C to +125°C Typ Max Units -2.0 +2.0 % -3.0 +3.0 % Line Regulation VIN = VOUT + 1V to 5.5V; IOUT = 100µA 0.02 0.3 0.6 %/V %/V Load Regulation IOUT = 100µA to 150mA 0.5 2.0 % Dropout Voltage (Note 6) IOUT = 100µA 0.1 IOUT = 50mA 12 50 mV IOUT = 100mA 25 75 mV Ground Current mV IOUT = 150mA 35 100 mV EN1 = High; EN2 = Low; IOUT = 100µA to 150mA 85 120 µA EN1 = Low; EN2 = High; IOUT = 100µA to 150mA 85 120 µA µA µA EN1 = EN2 = High; IOUT1 = 150mA, IOUT2 = 150mA 150 190 Ground Current in Shutdown EN1 = EN2 = 0V 0.01 2 Ripple Rejection f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF 70 f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF 65 300 Current Limit VOUT = 0V Output Voltage Noise COUT = 1.0 µF; CBYP = 0.1µF; 10Hz to 100kHz dB 550 dB 950 30 mA µVRMS Enable Inputs (EN1 / EN2) Enable Input Voltage 0.2 Logic Low 1.1 Logic High Enable Input Current V V VIL ≤ 0.2V 0.01 µA VIH ≥ 1.0V 0.01 µA Turn-on Time (See Timing Diagram) Turn-on Time (LDO1 and 2) COUT = 1.0µF; CBYP = 0.01µF 30 100 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, 1.5k in series with 100pF. 5. Specification for packaged product only. 6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal VOUT. For outputs below 2.3V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V. March 2011 5 M9999-032411-C Micrel, Inc. MIC5310 Typical Characteristics MIC5310 - Output Noise Spectral Density 10 Dropout Voltage Ground Current vs. Temperature 90 40 88 30 0.1 Dropout (mV) Noise uV/√Hz 1 Ground Current (uA) 35 Vin=Vout +1 Cout =1uF Cby p=0.01u F V t =3V 0.01 25 20 15 Vin=Vout+1 Vout=3V 10 Cout=1uF 5 100 0 20 40 60 Frequency (Hz) Vin = Vout + 1V EN1 = Vin, EN2 = GND Vout = 3V Cout = 1 uF 50 mA 76 100 uA 74 80 100 120 -40 140 -20 0 20 40 60 80 100 120 Temperature (°C) Output Voltage vs Output Current 3.3 Dropout Characteristics 3.5 3.15 3.2 3.05 3 2.95 Vin = Vout + 1V Vin = EN1 = EN2 2.9 2.85 Vout = 3V Iout = 100 uA Cout = 1 uF 2.8 3 Output Voltage (V) Output Voltage (V) 3.1 3.1 3 2.9 Vin=Vout +1 2.8 Vout =3V 2.75 2.5 100uA 2 150mA 1.5 1 Cout =1uF 0.5 Cout =1uF 2.7 0 2.7 -40 -20 0 20 40 60 80 100 120 0 25 Temperature (°C) 50 75 100 125 0 150 Output Current (mA) Dropout Voltage Ground Current vs Output Current 50 1 2 3 4 5 6 Input Voltage (V) Current Limit vs. Input Voltage 600 Vout = 3 V Vin = Vout + 1 V 90 580 Vin = EN1 = EN2 88 560 Cout = 1 uF 86 100 mA 30 20 50 mA 10 100u A 10mA Ground Current (uA) 1 50 mA Current Limit (mA) Output Voltage (V) 100 mA 78 • 3.2 Dropout Voltage (mV) 80 Iout (mA) Output Voltage 40 82 70 0 1,000 10,000 100,00 1,000,0 10,000, 0 00 000 84 72 0.001 10 150 mA 86 84 82 Vout=3V Vin=Vout+1V Ven1=Ven2=Vin 80 78 76 Cout1=Cout2=1uF -60 -40 -20 March 2011 0 20 40 60 80 Temperature (°C) 100 120 140 520 500 480 460 74 440 72 420 70 0 540 Cout=1uF Ven=Vin 400 0 25 50 75 100 Output Current (mA) 6 125 150 2 3 4 5 Input Voltage (V) M9999-032411-C Micrel, Inc. MIC5310 Typical Characteristics (Continued) Power Supply Rejection Ratio -80 -80 -70 -70 -60 -60 -50 -50 -40 dB dB Power Supply Rejection Ratio -40 -30 Vin= 3.4V Vout=3V -20 Cout=1uF Iout=50mA -20 -10 Cbyp=0.1uF -10 0 0 10 100 -30 1,000 10,000 100,000 Frequency (Hz) March 2011 1,000,000 10 100 Vin= 3.6V Vout =3V Cout =1uF Iout =150mA Cby p=0.1uF 1,000 10,000 100,000 1,000,000 Frequency (Hz) 7 M9999-032411-C Micrel, Inc. MIC5310 Functional Characteristics March 2011 8 M9999-032411-C Micrel, Inc. MIC5310 Applications Information Enable/Shutdown The MIC5310 comes with dual active-high enable pins that allow each regulator to be enabled independently. 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. Bypass Capacitor A capacitor can be placed from the noise bypass pin to ground to reduce output voltage noise. The capacitor bypasses the internal reference. A 0.1µF capacitor is recommended for applications that require low-noise outputs. The bypass capacitor can be increased, further reducing noise and improving PSRR. Turn on time increases slightly with respect to bypass capacitance. A unique, quick start circuit allows the MIC5310 to drive a large capacitor on the bypass pin without significantly slowing turn on time. Input Capacitor The MIC5310 is a high-performance, high bandwidth device. Therefore, it requires a well bypassed input supply for optimal performance. A 1µF capacitor 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. No-Load Stability Unlike many other voltage regulators, the MIC5310 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep alive applications. Thermal Considerations The MIC5310 is designed to provide 150mA of continuous current for both outputs in a very small package. Maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. Given that the input voltage is 3.3V, the output voltage is 2.8V for VOUT1, 1.5V for VOUT2 and the output current = 150mA. The actual power dissipation of the regulator circuit can be determined using the equation: PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) IOUT2+ 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 this calculation. PD = (3.3V – 2.8V) × 150mA + (3.3V -1.5) × 150mA PD = 0.345W To determine the maximum ambient operating temperature of the package, use the junction-toambient thermal resistance of the device and the following basic equation: Output Capacitor The MIC5310 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 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. March 2011 PD(MAX) = ⎛ ⎝ TJ(MAX) - TA JA TJ(max) = 125°C, the maximum junction temperature of the die θJA thermal resistance = 90°C/W. The table below shows junction-to-ambient thermal resistance for the MIC5310 in different packages. 9 M9999-032411-C Micrel, Inc. MIC5310 Package θJA Recommended Minimum Footprint 8-Pin 2x2 MLF® 90°C/W Thermal Resistance Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The junction-to-ambient thermal resistance for the minimum footprint is 90°C/W. The maximum power dissipation must not be exceeded for proper operation. March 2011 For example, when operating the MIC5310-MFYML at an input voltage of 3.3V and 150mA loads at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.345W = (125°C – TA)/(90°C/W) TA = 93.95°C Therefore, a 2.8V/1.5V application with 150mA at each output current can accept an ambient operating temperature of 93.95°C in a 2mm x 2mm 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 M9999-032411-C Micrel, Inc. MIC5310 Package Information 8-Pin 2mm x 2mm MLF (ML) 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. © 2006 Micrel, Incorporated. March 2011 11 M9999-032411-C