MIC5302 150mA ULDO™ in Ultra-Small 1.2mm x 1.6mm Thin MLF® General Description Features The MIC5302 is an ultra-small, ultra-low dropout CMOS regulator, ULDO™ that is ideal for today’s most demanding portable applications including cellular phone RF power, camera modules, imaging sensors for digital still and video cameras, PDAs, portable media players (PMP) and PC cameras where board space is limited. It offers extremely-low dropout voltage, very-low output noise and can operate from a 2.3V to 5.5V input while delivering up to 150mA. It offers 2% initial accuracy, low ground current (typically 85µA total), thermal- and current-limit protection. The MIC5302 can also be put into a zero-off-mode current state, drawing no current when disabled. The MIC5302 is available in the ultra small 4-pin 1.2mm x ® 2 1.6mm Thin MLF package, occupying only 1.92mm of PCB area, a 50% reduction in board area compared to SC-70 and 2mm x 2mm MLF® packages. Its operating junction temperature range is –40°C to +125°C and is available in fixed output voltages in lead-free (RoHS compliant) Thin MLF® package. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. • • • • • • • • • Ultra-small 1.2mm x 1.6mm Thin MLF® package Low dropout voltage: 50mV at 150mA Output noise 120µVrms Input voltage range: 2.3V to 5.5V 150mA guaranteed output current Stable with ceramic output capacitors Low quiescent current 85µA total 35µs turn-on time High output accuracy – ±2% initial accuracy – ±3% over temperature • Thermal-shutdown and current-limit protection Applications • • • • • • Mobile Phones PDAs GPS Receivers Portable Media Players Portable Electronics Digital Still & Video Cameras Typical Application MIC5302-x.xYMT 60 VIN 50 VOUT 40 EN 1µF Dropout Voltage vs. Output Current GND 1µF 30 20 10 RF LDO Application 0 02 VOUT = 2.8V COUT = 1µF 55 07 5 100 125 150 OUTPUT CURRENT (mA) 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 August 2010 M9999-080510-F Micrel, Inc. MIC5302 Block Diagram VIN VOUT EN VREF QuickStart Thermal Shutdown Error LDO Amp Current Limit GND MIC5302 Block Diagram August 2010 2 M9999-080510-F Micrel, Inc. MIC5302 Ordering Information(1) Part Number Marking Code MIC5302-1.3YMT H13 Voltage Temperature Range 1.3V Package –40°C to +125°C Lead Finish 4-Pin 1.2mm x 1.6mm Thin MLF ® Pb-Free ® Pb-Free MIC5302-1.5YMT H15 1.5V –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF MIC5302-1.8YMT H18 1.8V –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF® Pb-Free –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF ® Pb-Free ® Pb-Free MIC5302-2.1YMT H21 2.1V MIC5302-2.5YMT H25 2.5V –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF MIC5302-2.6YMT H26 2.6V –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF® Pb-Free –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF ® Pb-Free ® Pb-Free MIC5302-2.8YMT H28 2.8V MIC5302-2.85YMT H2J 2.85V –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF MIC5302-2.9YMT H29 2.9V –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF® Pb-Free –40°C to +125°C 4-Pin 1.2mm x 1.6mm Thin MLF ® Pb-Free 4-Pin 1.2mm x 1.6mm Thin MLF ® Pb-Free 4-Pin 1.2mm x 1.6mm Thin MLF ® Pb-Free MIC5302-3.0YMT MIC5302-3.3YMT MIC5302-4.6YMT H30 H33 H46 3.0V 3.3V –40°C to +125°C 4.6V –40°C to +125°C Note: 1. Other voltages available. Contact Micrel Marketing for details. Pin Configuration EN 1 4 VOUT GND 2 3 VIN 4-Pin 1.2mm x 1.6mm Thin MLF® (MT) Pin Description Pin Number Pin Name 1 EN 2 GND Ground 3 VIN Supply Input 4 VOUT Output Voltage HS Pad EPAD Exposed heatsink pad connected to ground internally. August 2010 Pin Function Enable Input. Active High. High = on, low = off. Do not leave floating. 3 M9999-080510-F Micrel, Inc. MIC5302 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) ............................................. 0V to +6V Enable Input (VEN) ................................................ 0V to +6V Power Dissipation(3)...................................Internally Limited Lead Temperature (soldering, 5 sec.)........................ 260°C Junction Temperature (TJ) ........................–40°C to +125°C Storage Temperature (Ts) .........................–65°C to +150°C Supply voltage (VIN) ..................................... +2.3V to +5.5V Enable Input (VEN) .................................................. 0V to VIN Junction Temperature (TA) ........................ –40°C to +125°C Junction Thermal Resistance Thin MLF® -4 (θJA) ...........................................173°C/W Electrical Characteristics(4) VIN = VOUT + 1V; COUT = 1.0µF; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted. Parameter Output Voltage Accuracy Line Regulation Load Regulation(5) Dropout Voltage(6) Ground Pin Current(7) Ground Pin Current in Shutdown Ripple Rejection Current Limit Output Voltage Noise Enable Input Enable Input Voltage Enable Input Current Turn-on Time Condition Variation from nominal VOUT Variation from nominal VOUT; –40°C to +125°C VIN = VOUT +1V to 5.5V; IOUT = 100µA Min Typ Max Units 0.02 +2 +3 0.3 0.6 2.0 % % %/V –2 –3 IOUT = 100µA to 150mA IOUT = 100µA IOUT = 50mA IOUT = 100mA IOUT = 150mA IOUT = 0 to 150mA, EN = High 0.5 0.1 15 30 50 85 100 120 % mV mV mV mV µA VEN = 0V 0.1 2 µA f = up to 1kHz; COUT = 1.0µF f = 1kHz – 20kHz; COUT = 1.0µF VOUT = 0V COUT =1µF, 10Hz to 100kHz 65 42 250 400 120 35 725 0.2 Logic Low Logic High VIL < 0.2V VIH > 1.0V COUT = 1.0µF 1.1 0.01 0.01 35 1 1 100 dB dB mA µVRMS V 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. Specification for packaged product only. 5. 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. 6. 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. 7. 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. August 2010 4 M9999-080510-F Micrel, Inc. MIC5302 Typical Characteristics 100 90 Ground Pin Current vs. Output Current 90 88 80 86 70 60 84 82 50 40 80 78 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 20 10 55 07 5 100 125 150 OUTPUT CURRENT (mA) Power Supply Rejection Ratio -80 70 20 40 60 80 TEMPERATURE (°C) Dropout Voltage vs. Temperature -40 150mA 100mA 40 -30 30 -20 VIN = VOUT + 1V -10 VOUT = 2.8V COUT = 1µF 0 0.1 1 10 100 FREQUENCY (kHz) 50mA 20 Output Voltage vs. Output Current 0 20 40 60 80 TEMPERATURE (°C) Output Voltage vs. Supply Voltage 2.4 2.0 2.80 1.6 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 2.78 2.77 02 450 100µA 1.2 2.79 55 07 5 100 125 150 OUTPUT CURRENT (mA) Current Limit vs. Input Voltage 5.5 Dropout Voltage vs. Output Current 30 20 0 02 3.00 VOUT = 2.8V COUT = 1µF 55 07 5 100 125 150 OUTPUT CURRENT (mA) Output Voltage vs. Temperature 2.95 2.90 2.85 2.8 2.81 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) 50 100µA 3.2 2.82 0 3.0 10 10 1,000 10 40 50 50mA 100µA 30 20 60 60 -50 150mA 50 40 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 74 72 Ground Pin Current vs. Supply Voltage 60 100µA VOUT = 2.8V 80 COUT = 1µF 70 -60 150mA 2.83 80 70 150mA 90 -70 100 90 76 30 0 02 Ground Pin Current vs. Temperature 150mA 0.8 VOUT = 2.8V COUT = 1µF 0 0123456 SUPPLY VOLTAGE (V) 0.4 10 2.80 2.75 2.70 2.65 2.60 2.55 2.50 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF IOUT = 100µA 20 40 60 80 TEMPERATURE (°C) Output Noise Spectral Density 440 430 420 1 410 0.1 400 390 380 370 VOUT = 2.8V COUT = 1µF 360 350 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) August 2010 5.5 0.01 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 0.001 0.01 0.1 1 10 100 1,000 FREQUENCY (kHz) 5 M9999-080510-F Micrel, Inc. MIC5302 Functional Characteristics Enable Turn-On Enable (1V/div) Output Voltag e (20mV/div) Load Transient Response 150mA VIN = VOUT + 1V COUT = 1µF Output Current (50mA/div) Output Voltag e (1V/div) VOUT = 2.8V VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF Time (10µs/div ) Time (40µs/div ) Line Transient Response 5V Input Voltag e (2V/div) 4V VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF Output Voltag e (50mV/div) IOUT = 10mA Time (40µs/div ) August 2010 6 M9999-080510-F Micrel, Inc. MIC5302 The actual power dissipation of the regulator circuit can be determined using the equation: Application Information Enable/Shutdown The MIC5302 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. PD = (VIN – VOUT) IOUT + 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 = (3.6V – 2.8V) × 150mA PD = 0.12W 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: Input Capacitor The MIC5302 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 high-frequency noise and are good practice in any RF-based circuit. PD(MAX) = TJ(MAX) - TA JA TJ(max) = 125°C, the maximum junction temperature of the die θJA thermal resistance = 173°C/W. The table below shows junction-to-ambient thermal resistance for the MIC5302 in the 4-pin 1.2mm x 1.6mm MLF® package. Output Capacitor The MIC5302 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. Package θJA Recommended Minimum Footprint 4-Pin 1.2x1.6 MLF® 173°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-toambient thermal resistance for the minimum footprint is 173°C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5302-2.8YML at an input voltage of 3.6V and 150mA load with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.12W = (125°C – TA)/(173°C/W) No-Load Stability Unlike many other voltage regulators, the MIC5302 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. Thermal Considerations The MIC5302 is designed to provide 150mA of continuous current. 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 3.6V, the output voltage is 2.8V and the output current = 150mA. August 2010 ⎛ ⎝ TA=104°C Therefore, a 2.8V application with 150mA of output current can accept an ambient operating temperature of 104°C in a 1.2mm x 1.6mm 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 7 M9999-080510-F Micrel, Inc. MIC5302 Package Information 4-Pin 1.2mm 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. © 2006 Micrel, Incorporated. August 2010 8 M9999-080510-F