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. 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 Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. Typical Application MIC5310-x.xYML VIN VOUT 1 Rx/Synth EN 1 VOUT 2 Tx EN 2 1µF BYP GND 1µF 1µF RF Transceiver 0.1µF RF Power Supply Circuit 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 April 2006 M9999-042406 (408) 955-1690 Micrel, Inc. MIC5310 Block Diagram VIN VOUT 1 LDO1 LDO2 VOUT 2 EN 1 EN 2 Enable BYP Reference GND MIC5310 Fixed Block Diagram April 2006 2 M9999-042406 (408) 955-1690 Micrel, Inc. MIC5310 Ordering Information Voltage Junction Temperature Range MIC5310-GFYML 1.8V/1.5V –40°C to +125°C MIC5310-2.5/2.5YML MIC5310-JJYML 2.5V/2.5V –40°C to +125°C 8-Pin 2x2 MLF® 8-Pin 2x2 MLF® MIC5310-2.6/1.85YML MIC5310-KDYML 2.6V/1.85V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.8/1.5YML MIC5310-MFYML 2.8V/1.5V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.8/1.8YML MIC5310-MGYML 2.8V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.8/2.6YML MIC5310-MKYML 2.8V/2.6V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.8/2.8YML MIC5310-MMYML 2.8V/2.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.85/2.85YML MIC5310-NNYML 2.85V/2.85V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.9/1.8YML MIC5310-OGYML 2.9V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-2.9/2.9YML MIC5310-OOYML 2.9V/2.9V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/1.8YML MIC5310-PGYML 3.0V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/2.6YML MIC5310-PKYML 3.0V/2.6V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/2.85YML MIC5310-PNYML 3.0V/2.85V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.0/3.0YML MIC5310-PPYML 3.0V/3.0V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/1.8YML MIC5310-SGYML 3.3V/1.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/2.6YML MIC5310-SKYML 3.3V/2.6V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/2.8YML MIC5310-SMYML 3.3V/2.8V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/3.0YML MIC5310-SPYML 3.3V/3.0V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/3.2YML MIC5310-SRYML 3.3V/3.2V –40°C to +125°C 8-Pin 2x2 MLF® MIC5310-3.3/3.3YML MIC5310-SSYML 3.3V/3.3V –40°C to +125°C 8-Pin 2x2 MLF® Part number Manufacturing Part Number MIC5310-1.8/1.5YML Package Other voltage options available. Contact Micrel for more details. April 2006 3 M9999-042406 (408) 955-1690 Micrel, Inc. MIC5310 Pin Configuration VIN 1 8 VOUT1 GND 2 7 VOUT2 BYP 3 6 NC EN2 4 5 EN1 8-Pin 2mm × 2mm MLF (ML) Top View Pin Description Pin Number MLF-8 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. 6 NC Not internally connected 7 VOUT2 Regulator Output – LDO2 8 VOUT1 Regulator Output – LDO1 April 2006 4 M9999-042406 (408) 955-1690 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 Output Voltage Accuracy Conditions Min Typ Variation from nominal VOUT -2.0 +2.0 % -3.0 +3.0 % 0.02 0.3 0.6 %/V %/V 2.0 VIN = VOUT + 1V to 5.5V; IOUT = 100µA Load Regulation IOUT = 100µA to 150mA 0.5 Dropout Voltage (Note 6) IOUT = 100µA 0.1 IOUT = 50mA 12 IOUT = 100mA IOUT = 150mA Ground Current in Shutdown Ripple Rejection Units Variation from nominal VOUT; –40°C to +125°C Line Regulation Ground Current Max % mV 50 mV 25 75 mV 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 EN1 = EN2 = High; IOUT1 = 150mA, IOUT2 = 150mA 150 190 µA EN1 = EN2 = 0V 0.01 2 µA f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF 70 dB f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF 65 dB 300 Current Limit VOUT = 0V Output Voltage Noise COUT = 1.0 µF; CBYP = 0.1µF; 10Hz to 100kHz 550 950 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 = 0.01F 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. April 2006 5 M9999-042406 (408) 955-1690 Micrel, Inc. MIC5310 Typical Characteristics -80 Power Supply Rejection Ratio -80 Power Supply Rejection Ratio 40 -70 -70 35 -60 -60 30 -50 -50 25 -40 -40 20 -30 -30 VIN = 3.6V -20 VOUT = 3V COUT = 1µF -10 CBYP = 0.1µF IOUT = 150mA 0 0.1 1 10 100 FREQUENCY (kHz) 15 VIN = 3.4V -20 VOUT = 3V COUT = 1µF -10 CBYP = 0.1µF IOUT = 50mA 0 0.1 1 10 100 FREQUENCY (kHz) 1,000 Ground Current vs. Temperature 90 88 86 150mA 84 3.20 3.15 3.10 3.05 82 100mA 80 50mA 78 76 100µA VIN = VOUT + 1V 74 VOUT = 3V C OUT = 1µF 72 EN1 = VIN, EN2 = GND 70 20 40 60 80 TEMPERATURE (°C) 3.00 2.95 2.90 2.85 2.80 3.5 Output Voltage vs. Input Voltage 90 2.5 0.5 0.0 1 600 580 560 540 520 500 480 460 440 1,000 Output Voltage vs. Temperature 20 10 COUT = 1µF 2 3 4 5 INPUT VOLTAGE (V) 6 Current Limit vs. Input Voltage 0 10 25 50 75 100 125 150 OUTPUT CURRENT (mA) Output Voltage vs. Output Current 3.0 VIN = VOUT + 1V VIN = EN1 = EN2 VOUT = 3V COUT = 1µF IOUT = 100µA 20 40 60 80 TEMPERATURE (°C) Dropout Voltage vs. Temperature 150mA 100mA 30 100µA 3.3 VOUT = 3V COUT = 1µF 3.1 40 150mA 0 0 3.2 50 COUT = 1µF 420 VEN = VIN 400 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V) April 2006 5 60 2.0 1.0 10 VOUT = 3V 80 VIN = EN1 = EN2 70 COUT = 1µF 3.0 1.5 2.75 2.70 Dropout Voltage vs. Output Current 50mA 10mA 100µA 20 40 60 80 TEMPERATURE (°C) 2.9 2.8 2.7 0 90 88 86 84 82 80 78 76 74 72 70 0 VIN = VOUT + 1V VOUT = 3V COUT = 1µF 25 50 75 100 125 150 OUTPUT CURRENT (mA) Ground Current vs. Output Current VIN = VOUT + 1V VOUT = 3V VEN1 = VEN2 = VIN COUT1 = COUT2 = 1µF 25 50 75 100 125 150 OUTPUT CURRENT (mA) Output Noise Spectral Density 1 0.1 VIN = 4V 0.01 VOUT = 3V COUT = 1µF CBYP = 0.1µF ILOAD = 60mA 0.001 0.01 0.1 1 10 100 1,000 FREQUENCY (kHz) 6 M9999-042406 (408) 955-1690 Micrel, Inc. MIC5310 Functional Characteristics Enable Turn-On Enable (2V/div) Output Voltage (20mV/div) Load Transient VIN = VOUT + 1V VOUT = 3V COUT = 1µF CBYP = 0.1µF Output Current (50mA/div) Output Voltage (1V/div) 150mA VIN = VOUT + 1V VOUT = 3V COUT = 1µF CBYP = 0.01µF 10mA Time (10µs/div) Time (40µs/div) 5V 4V VIN = VOUT + 1V VOUT = 3V COUT = 1µF CBYP = 0.1µF IOUT = 10mA Output Voltage (50mV/div) Input Voltage (2V/div) Line Transient Time (40µs/div) April 2006 7 M9999-042406 (408) 955-1690 Micrel, Inc. MIC5310 Applications Information 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. 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. 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. 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 highfrequency capacitors, such as small-valued NPO dielectric-type capacitors, help filter out highfrequency noise and are good practice in any RFbased circuit. 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 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. 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: 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(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. Bypass Capacitor A capacitor can be placed from the noise bypass pinto-ground to reduce output voltage noise. The capacitor bypasses the internal reference. A 0.1µF capacitor is recommended for applications that require April 2006 ⎛ ⎝ 8 M9999-042406 (408) 955-1690 Micrel, Inc. MIC5310 Package θJA Recommended Minimum Footprint 8-Pin 2x2 MLF® 90°C/W 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 Thermal Resistance The maximum power dissipation must not be exceeded for proper operation. 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: For example, when operating the MIC5310-MFYML at http://www.micrel.com/_PDF/other/LDOBk_ds.pdf Substituting PD for PD(max) and operating temperature will operating conditions for the junction-to-ambient thermal minimum footprint is 90°C/W. April 2006 solving for the ambient give the maximum regulator circuit. The resistance for the 9 M9999-042406 (408) 955-1690 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 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. © 2006 Micrel, Inc. April 2006 10 M9999-042406 (408) 955-1690