MIC5264 150mA µCap Dual LDO Regulator General Description Features The MIC5264 is a dual 150mA LDO in tiny 2.5mm x 2.5mm MLF™ packaging ideal for applications where cost is the priority. The MIC5264 is ideal for any application in portable electronics, including both RF and Digital applications. With low output noise and high PSRR, the MIC5264 is ideal for noise sensitive RF applications. While the fast transient response and active shutdown circuitry makes it well-suited for powering digital circuitry. The MIC5264 has a 2.7V to 5.5V input operating voltage range, making it ideal for operation from a single cell lithium ion battery or fixed 3.3V and 5V systems. Each LDO is completely independent and can be powered independently, making it easier to use in distributed power applications. • • • • • • • • • • 2.7V to 5.5V supply voltage. Low 75µA quiescent current per LDO. Tiny 2.5mm x 2.5mm MLF™ package. Low Noise – 57µVrms. High PSRR – 60dB at 1kHz. Low dropout voltage – 210mV at 150mA. Stable with ceramic output capacitors. Independent enable pins. Fast transient response. Active shutdown on both outputs. Applications • • • Cellular Telephones PDAs GPS Receivers The MIC5264 offers low dropout voltage (210mV at 150mA), low output noise (57µVrms), high PSRR and integrates an active shutdown circuit on the output of each regulator to discharge the output voltage when disabled. Data sheets and supporting documentation can be found on Micrel’s web site at: www.micrel.com Typical Application MIC5264-xxYML VIN 1 VIN 2 EN 1 EN 2 1µF BYP1 Rx/Synth Tx OUT 1 OUT 2 1µF GND BYP2 1µF RF Transceiver -80 Power Supply Rejection Ratio -70 -60 -50 -40 -30 0.01µF 0.01µF RF Power Supply -20 VIN = VOUT + 1V VOUT = 3.0V -10 BYP = 0.1µF COUT = 1µF 0 0.01 0.1 1 10 100 FREQUENCY (kHz) 1000 MicroLeadFrame and MLF are 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 2005 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 Ordering Information Vo1/Vo2 Marking Code Junction Temp. Range Package Pb-Free MIC5264-MFYML 2.8V/1.5V MAMF –40°C to +125°C 2.5mm x 2.5mm MLF™ MIC5264-2.8/2.8YML MIC5264-MMYML 2.8V/2.8V MAMM –40°C to +125°C 2.5mm x 2.5mm MLF™ MIC5264-2.85/2.85YML MIC5264-NNYML 2.85V/2.85V MANN –40°C to +125°C 2.5mm x 2.5mm MLF™ MIC5264-3.0/1.8YML MIC5264-PGYML 3.0V/1.8V MAPG –40°C to +125°C 2.5mm x 2.5mm MLF™ MIC5264-3.0/2.8YML MIC5264-PMYML 3.0V/2.8V MAPM –40°C to +125°C 2.5mm x 2.5mm MLF™ MIC5264-3.0/3.0YML MIC5264-PPYML 3.0V/3.0V MAPP –40°C to +125°C 2.5mm x 2.5mm MLF™ Part Number Full Manufacturing MIC5264-2.8/1.5YML Note: 1. Other Voltage Combinations available. Contact Micrel for details. Pin Configuration 10 EN1 GND1 1 IN1 2 9 BYP1 OUT1 3 8 OUT2 BYP2 4 7 IN2 EN2 5 6 GND2 2.5mm × 2.5mm MLF-10L (ML) Pin Description Pin Number 1 Pin Name 2 IN1 3 OUT1 Regulator Output 4 BYP2 Reference Bypass: Connect external 0.01µF <= CBYP <= 1.0µF capacitor to GND to reduce output noise. Do not leave open. 5 EN2 6 GND2 7 IN2 8 OUT2 Regulator Output 9 BYP1 Reference Bypass: Connect external 0.01µF <= CBYP <= 1.0µF capacitor to GND to reduce output noise. Do not leave open. 10 EN1 EP Exposed Pad April 2005 GND1 Pin Function Ground Supply Voltage Enable/Shutdown (Input): CMOS compatible input. Logic high = enable; logic low = shutdown. Do not leave open. Ground Supply Voltage Enable/Shutdown (Input): CMOS compatible input. Logic high = enable; logic low = shutdown. Do not leave open. Exposed Pad. Connect to external ground pins. 2 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Input Voltage (VIN1/IN2) .............................. 0V to +7V Enable Input Voltage (V EN1/EN2)............................ 0V to +7V Power Dissipation (PD) .......................... Internally Limited (3) Junction Temperature (TJ) ...........................-40°C to 125°C Lead Temperature (soldering, #sec.)...........-55°C to 150°C Storage Temperature (Ts) .......................................... 260°C EDS Rating (4) ................................................................. 2kV Supply Input Voltage (VIN1/IN2) ...................... +2.7V to +5.5V Enable Input Voltage (VEN1/EN2) ............................ 0V to +VIN Junction Temperature (TA) ........................ –40°C to +125°C Junction Thermal Resistance MLF-10L (θJA) ....................................................75°C/W Electrical Characteristics(5) VEN = VIN = VOUT + 1V; IL =100µA; CL = 1.0µF; CBYP = 0.01µF per output; TA = 25°C, bold values indicate –40°C< TA < +85°C; unless noted. Parameter Condition Output Voltage Accuracy IOUT = 100uA Line Regulation VIN = VOUT +1V to 5.5V 0.05 Load Regulation IOUT = 0.1mA to 150mA 2 Dropout Voltage IOUT = 50mA IOUT = 150mA VEN < 0.4V 75 210 0.2 Current Limit IOUT = 0mA IOUT = 150mA f = 100Hz, CBYP = 0.1µF, ILOAD = 50mA f = 1kHz, CBYP = 0.1µF, ILOAD = 50mA f = 10kHz, CBYP = 0.1µF, ILOAD = 50mA VOUT = 0V 75 80 62 64 64 225 Output Noise COUT = 1.0µF, CBYP = 0.1µF, f = 10Hz to 100kHz 57 Quiescent Current Ground Pin Current (Per Regulator) PSRR (Ripple Rejection) Enable Input (EN1 and EN2) Enable Input Logic Low Enable Input Logic High Enable Input Current Min Typ -2 -3 VIN = 2.7V to 5.5V, regulator shutdown VIN = 2.7V to 5.5V, regulator enabled VIL < 0.4V, regulator shutdown VIH > 1.6V, regulator enabled Thermal Shutdown Thermal Shutdown Temperature Max Units 2 3 0.2 % % % 3 % 500 2 mV mV µA 120 150 µV (rms) 0.2 1.6 0.01 0.01 10 40 500 V V µA µA °C °C 150 Hysteresis Turn-on/Turn-off Characteristics Turn-on Time Discharge Resistance µA µA dB dB dB mA 150 µs Ω 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. The θJA of the MIC5264x.xYML (all versions) is 75°C/W on a PC board (see ”Thermal Considerations” section for further details). 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 5. Specification for packaged product only. April 2005 3 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 Typical Characteristics -70 Power Supply Rejection Ratio -80 -70 -70 -60 -50 -50 -40 -40 -40 -30 -30 -30 -20 VIN = VOUT + 1V VOUT = 3.0V -10 BYP = 0.01µF COUT = 1µF 0 0.01 0.1 1 10 100 FREQUENCY (kHz) 1000 Dropout Voltage vs. Output Current -20 VIN = VOUT + 1V VOUT = 3.0V -10 BYP = 0.1µF COUT = 1µF 0 0.01 0.1 1 10 100 FREQUENCY (kHz) 0.30 1000 Dropout Voltage vs. Temperature 25°C 0.20 0.15 0.15 -40°C 0.10 0.10 0.00 0 3.05 100mA 3.00 2.95 50mA 0.05 25 50 75 100 125 150 OUTPUT CURRENT (mA) Output Voltage vs. Input Voltage 3 2.5 100µA Load 150µA Load 2 1.5 1 0.5 0 0 95 1 2 3 4 INPUT VOLTAGE(V) Ground Pin Current vs. Temperature 5 10mA 1mA 2.85 0.00 -40 -15 10 35 60 85 110 TEMPERATURE (°C) 83 82 81 80 79 78 77 76 75 74 73 72 0 90 85 Ground Pin Current vs. Output Current Ground Pin Current vs. Temperature 78 76 74 72 VIN = VOUT + 1V VOUT = 3.0V 30 60 90 120 150 OUTPUT CURRENT (mA) Ground Pin Current vs. Input Voltage 70 68 -40 90 70 70 60 60 50 50 75 40 40 30 65 60 -40 April 2005 20 Iload = 150mA -10 20 50 80 110 TEMPERATURE (°C) 10 0 0 Iload = 100µA -10 20 50 80 110 TEMPERATURE (°C) Ground Pin Current vs. Input Voltage 80 80 70 Iload = 100µA VOUT = 3.0V VIN = VOUT + 1 2.80 -40 -15 10 35 60 85 110 TEMPERATURE (°C) 80 90 Dropout Voltage vs. Temperature 3.10 150mA 2.90 0.05 1000 1000000 3.15 0.25 0.20 -20 VIN = VOUT + 1V VOUT = 3.0V -10 BYP = 1µF COUT = 1µF 0 10 100 1000 10000 0.01 0.1 1 10 100000 100 FREQUENCY (kHz) 3.20 125°C 0.25 Power Supply Rejection Ratio -60 -60 -50 0.30 Power Supply Rejection Ratio 30 20 Iload = 100µA VOUT = 3.0V VIN = VOUT + 1 1 2 3 4 INPUT VOLTAGE (V) 4 10 5 0 0 Iload = 150µA VOUT = 3.0V VIN = VOUT + 1 1 2 3 4 INPUT VOLTAGE (V) 5 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 Typical Characteristics (continued) Short Circuit Current vs. Input Voltage 10 290 270 Output Noise Spectral Density 1 250 230 0.1 210 190 170 150 3 April 2005 3.5 4 4.5 5 INPUT VOLTAGE (V) 5.5 VIN = 4.2V 0.01 VOUT = 2.8V COUT = 1.0µF BYP = 0.1µF IOUT = 150mA 0.001 10 100 1000 1000000 10000000 0.01 0.1 1 10000 10 100000 100 1000 10000 FREQUENCY (kHz) 5 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 Functional Characteristics Load Transient Response Output Voltage (50mV/div) 5.0V 4.0V COUT = 1µF Ceramic CBYP = 0.01µF IOUT = 150mA VOUT = 3.0V VIN = V OUT + 1V 150mA Output Current (50mA/div) Output Voltage (20mV/div) Input Voltage (1V/div) Line Transient Response Time (400µs/div) COUT = 1µF Ceramic CBYP = 0.01µF VOUT = 3.0V VIN = V OUT + 1V Time (5µs/div) Shutdown Delay CIN = 1µF Ceramic COUT = 1µF Ceramic IOUT = 10mA VOUT = 3.0V VIN = V OUT + 1V Enable Voltage (1V/div) Enable Voltage (1V/div) Output Voltage (1V/div) Output Voltage (1V/div) Enable Pin Delay CIN = 1µF Ceramic CBYP = 0.01µF IOUT = 10mA VOUT = 3.0V VIN = VOUT + 1V Time (10µs/div) April 2005 100µA Time (100µs/div) 6 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 Block Diagram IN1 Reference Voltage Startup/ Shutdown Control Quickstart/ Noise Cancellation BYP1 EN1 Thermal Sensor FAULT Error Amplifier Current Amplifier OUT1 Undervoltage Lockout ACTIVE SHUTDOWN GND1 IN2 Reference Voltage Startup/ Shutdown Control Quickstart/ Noise Cancellation BYP2 EN2 Thermal Sensor FAULT Error Amplifier Current Amplifier OUT2 Undervoltage Lockout ACTIVE SHUTDOWN GND2 MIC5264 Diagram April 2005 7 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 increases slightly with respect to bypass capacitance. A unique quick-start circuit allows the MIC5264 to drive a large capacitor on the bypass pin without significantly slowing turn-on time. Application Information Enable/Shutdown The MIC5264 comes with two independent active-high enable pins that allow the regulator in each output to be disabled separately. 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. This part is CMOS and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Active Shutdown The MIC5264 also features an active shutdown clamp, which is an N-channel MOSFET that turns on when the device is disabled. This allows the output capacitor and load to discharge, de-energizing the load. No-Load Stability The MIC5264 will remain stable and in regulation with no load unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Input Capacitor The MIC5264 is a high performance, high bandwidth device. Therefore, it requires well-bypassed input supplies for optimal performance. A 1uF 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. Thermal Considerations The MIC5264 is designed to provide 150mA of continuous current per output 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 5.0V, the VOUT1 output voltage is 3.0V at 150mA; VOUT2 output voltage is 2.8V at 100mA. Output Capacitor The MIC5264 requires capacitors at both outputs for stability. The design requires 1uF or greater on each output to maintain stability. The design is optimized for use with low-ESR ceramic chip capacitors. High ESR capacitors may cause high frequency oscillation. The maximum recommended ESR is 300mΩ. The output capacitor can be increased, but performance has been optimized for a 1uF ceramic output capacitor and does not improve significantly with larger capacitance. The actual power dissipation of the regulator circuit can be determined using the equation: PD = (VIN – VOUT) IOUT + VIN IGND Because this device is CMOS and the ground current is typically <100uA over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. PD = (5.0V-3.0V) x 150mA + (5.0V-2.8V) x 100mA 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 = 0.52W 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: ⎛ T J (max) − T A PD(max) = ⎜⎜ θ JA ⎝ TJ(max) = 125°C, the max. junction temperature of the die θJA thermal resistance = 63°C/W 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 0.01uF 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 April 2005 ⎞ ⎟ ⎟ ⎠ 8 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 MIC5264 Junction-To-Ambient Thermal Resistance Package 2.5mm x 2.5mm MLF-10 θJA Recommended Minimum Footprint θJC 75°C/W 2°C/W ⎛ 125°C − T A 0.52W = ⎜⎜ 63°C ⎝ TA = 92.24°C Therefore, a 3.0V application at 150mA on Ch1 and 2.8V at 100mA on Ch2 can accept an ambient operating temperature of 92°C in a 2.5mm x 2.5mm MLF™ 10Lead 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: 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 63°C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5264PMYML at an input voltage of 5.0V at 150mA on VOUT1 and 100mA on VOUT2 with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: April 2005 ⎞ ⎟⎟ ⎠ http://www.micrel.com/_PDF/other/LDOBk_ds.pdf 9 M9999-041505 (408) 955-1690 Micrel, Inc. MIC5264 Package Information 10-Pin 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. © 2005 Micrel, Incorporated. April 2005 10 M9999-041505 (408) 955-1690