MIC5331 Micro-Power High Performance Dual 300mA ULDO™ General Description Features The MIC5331 is a tiny dual low quiescent current LDO ideal for applications that are power sensitive. The MIC5331 integrates two high performance, 300mA LDOs into a tiny 2mm x 2mm Thin MLF® package, which occupies less PC board area than a single SOT-23 package. The MIC5331 is designed to reject input noise and provide low output noise with fast transient response to any load change quickly even though it is a low quiescent current part. This combination of PSRR, low noise and transient response along with low power consumption makes for a very high performance, yet general purpose product. The MIC5331 is a µCap design, operating with very small ceramic output capacitors, which reduces required board space and component cost; and it is available in fixed output voltages in the tiny 8-pin 2mm x 2mm Thin MLF® leadless package. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. • • • • • • • • • • 2.3V to 5.5V input voltage range 300mA output current per LDO Very low quiescent current: 25µA per LDO High PSRR - >65dB on each LDO Stable with 1µF ceramic output capacitors Tiny 8-pin 2mm x 2mm Thin MLF® package Ultra-low dropout voltage – 120mV @ 300mA Low output voltage noise – 50µVrms Thermal shutdown protection Current limit protection Applications • • • • • Camera phones Mobile phones PDAs GPS receivers Portable devices ___________________________________________________________________________________________________________ Typical Application MIC5331-xxYMT VBAT 1µF VIN VOUT1 I/O EN1 VOUT2 CORE EN2 GND 1µF 1µF Camera DSP Camera DSP 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 February 2008 M9999-021408-A Micrel, Inc. MIC5331 Ordering Information Part Number Manufacturing Part Number Marking Voltage Junction Temperature Range Package MIC5331-1.8/1.2YMT MIC5331-G4YMT UG4 1.8V/1.2V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5331-2.5/1.2YMT MIC5331-J4YMT UJ4 2.5V/1.2V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5331-2.8/2.8YMT MIC5331-MMYMT UMM 2.8V/2.8V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5331-2.8/2.85YMT MIC5331-MNYMT UMN 2.8V/2.85V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5331-2.85/2.85YMT MIC5331-NNYMT UNN 2.85V/2.85V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5331-3.0/2.8YMT MIC5331-PMYMT UPM 3.0V/2.8V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5331-3.0/2.85YMT MIC5331-PNYMT UPN 3.0V/2.85V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5331-3.0/3.0YMT MIC5331-PPYMT UPP 3.0V/3.0V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® Note: Other voltage options available. Contact Micrel for details. Pin Configuration VIN 1 8 VOUT1 GND 2 7 VOUT2 NC 3 6 NC EN2 4 5 EN1 8-Pin 2mm x 2mm Thin MLF® (MT) (Top View) Pin Description Pin Number Pin Name Pin Function 1 VIN Supply Input. 2 GND Ground. 3 NC Not Internally Connected. 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. February 2008 2 M9999-021408-A Micrel, Inc. MIC5331 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) ............................................. 0V to +6V Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN Power Dissipation .................................. Internally Limited(3) Lead Temperature (soldering, 3sec.)......................... 260°C Storage Temperature (Ts) .........................–65°C to +150°C ESD Sensitive(4) Supply Voltage (VIN)..................................... +2.3V to +5.5V Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN Junction Temperature (TJ) ........................ –40°C to +125°C Junction Thermal Resistance 2mm x 2mm Thin MLF-8 (θJA) ...........................90°C/W Electrical Characteristics(5) VIN = VEN1 = VEN2 = VOUT + 1.0V, higher of the two regulator outputs; IOUT1 = IOUT2 = 100µA; COUT1 = COUT2 = 1µF; TJ = 25°C, bold values indicate –40°C < TJ < +125°C; unless noted. Parameter Output Voltage Accuracy Line Regulation Condition Min Typ Max Units % Variation from nominal VOUT –1.0 +1.0 Variation from nominal VOUT; –40°C to +125°C –2.0 +2.0 % 0.3 %/V 0.6 %/V VIN = VOUT +1V to 5.5V; IOUT = 100µA 0.02 Load Regulation IOUT = 100µA to 300mA 0.2 0.5 % Dropout Voltage IOUT = 50mA 20 40 mV IOUT = 300mA 120 240 mV VEN1 = High; VEN2 = Low; IOUT = 100µA to 300mA 25 50 µA VEN1 = Low; VEN2 = High; IOUT = 100µA to 300mA 25 50 µA 40 75 µA 0.01 1.0 µA Ground Current VEN1 = VEN2 = High; IOUT1= 300mA, IOUT2 = 300mA Ground Current in Shutdown VEN1 = VEN2 < 0.2V Ripple Rejection f = 1kHz; COUT = 2.2µF 65 f = 20kHz; COUT = 2.2µF Current Limit VOUT = 0V Output Voltage Noise COUT=1µF; 10Hz to 100kHz dB 45 350 550 dB 800 50 mA µVRMS Enable Inputs (EN1/EN2 ) Enable Input Voltage Logic Low 0.2 Logic High Enable Input Current V V 1.2 VIL ≤ 0.2V 0.01 1.0 µA VIH ≥ 1.2V 0.01 1.0 µA COUT = 1µF (Enable of First LDO) 140 500 µs COUT = 1µF (Enable of Second LDO after First Enabled) 110 500 µs Turn-on Time Turn-on Time (LDO1 and 2) 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, 1.5kΩ in series with 100pF. 5. Specification for packaged product only. February 2008 3 M9999-021408-A Micrel, Inc. MIC5331 Typical Characteristics PSRR -100 -90 PSRR -80 50mA -80 0.10 -60 -50 300mA 0.06 -30 -20 VIN = 2.3V V = 1.2V -10 OUT COUT = 2.2µF 0 -20 VIN = 2.3V -10 VOUT = 1.2V COUT = 1µF 0 Dropout Voltage vs. Temperature Ground Current vs. Supply Voltage 40 38 300mA 0.12 0.08 100mA 0.06 0.04 50mA 0.02 10mA 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) Ground Current vs. Temperature 39 10mA 100mA 300mA EN1 = EN2 = VIN VIN = VOUT + 1V 33 VOUT = 2.8V COUT = 1µF 30 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 850 800 20 2 2.820 42 Current Limit vs. Supply Voltage 39 Single LDO Enabled 27 2.5 3 3.5 4 4.5 5 SUPPLY VOLTAGE (V) 5.5 Output Voltage vs. Load Current 25 0 3.0 2.8 2.808 2.7 2.800 0 1.0 700 650 0.8 Ground Current vs. Load Current Dual LDO Enabled 35 VIN = VOUT + 1V VOUT1 = 2.5V 33 VOUT2 = 1.2V 31 COUT1 = 1µF COUT2 = 1µF 29 2.812 2.804 50 100 150 200 250 300 LOAD CURRENT (mA) 37 2.9 750 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 50 100 150 200 250 300 LOAD CURRENT (mA) 2.6 Single LDO Enabled 50 100 150 200 250 300 LOAD CURRENT (mA) Output Voltage vs. Temperature VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 2.5 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) Output Noise Spectral Density VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF Load = 50mA 0.6 0.4 500 450 400 350 2 41 Dual LDO Enabled 2.816 1.2 600 550 0 0 36 VOUT1 = 2.5V 34 VOUT2 = 1.2V 32 COUT1 = 1µF C = 1µF 30 OUT2 IOUT1 = 300mA 28 I OUT2 = 300mA 26 24 22 VOUT = 2.8V COUT = 1µF 0.02 FREQUENCY (Hz) 0.10 36 0.04 FREQUENCY (Hz) VOUT = 2.8V 0.16 COUT = 1µF 0.14 45 0.08 300mA -40 -30 0.18 0.12 50mA -70 -70 -60 -50 -40 0.14 -90 Dropout Voltage vs. Load Current CIN = 1µF COUT = 1µF 2.5 3 3.5 4 4.5 5 SUPPLY VOLTAGE (V) February 2008 5.5 0.2 0 10 100 1K 10K 100K FREQUENCY (Hz) 4 1M M9999-021408-A Micrel, Inc. MIC5331 Functional Characteristics February 2008 5 M9999-021408-A Micrel, Inc. MIC5331 Functional Diagram VIN VOUT1 LDO1 LDO2 EN1 EN2 VOUT2 Reference Enable Thermal Shutdown GND MIC5331 Block Diagram February 2008 6 M9999-021408-A Micrel, Inc. MIC5331 the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Application Information MIC5331 is a tiny dual low quiescent current 300mA LDO. The MIC5331 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Thermal Considerations The MIC5331 is designed to provide 300mA 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. For example if the input voltage is 3.6V, the output voltage is 3.0V for VOUT1, 2.8V for VOUT2 and the output current = 300mA. The actual power dissipation of the regulator circuit can be determined using the equation: PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I OUT2 + 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 – 3.0V) × 300mA + (3.6V -2.8) × 300mA PD = 0.42W 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 MIC5331 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. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. Output Capacitor The MIC5331 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. ⎛ TJ(MAX) − TA PD(MAX) = ⎜⎜ θ JA ⎝ TJ(max) = 125°C, and the maximum junction temperature of the die, θJA, thermal resistance = 90°C/W. 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 90°C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5331-PMYMT at an input voltage of 3.6V and 300mA loads at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.42W = (125°C – TA)/(90°C/W) TA = 87.2°C Therefore, a 3.0V/2.8V application with 300mA at each output current can accept an ambient operating temperature of 87°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 No-Load Stability Unlike many other voltage regulators, the MIC5331 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. Enable/Shutdown The MIC5331 comes with dual active-high enable pins that allow each regulator to be disabled 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 February 2008 ⎞ ⎟ ⎟ ⎠ 7 M9999-021408-A Micrel, Inc. MIC5331 MIC5331 Typical Application Circuit U1 MIC5331-xxYMT VIN J1 VIN 1 R3 10k VIN VOUT1 NC VOUT2 8 J6 VOUT1 7 J8 VOUT2 R2 10k 3 J4 EN2 4 J5 EN1 5 EN2 EN1 NC GND C1 1µF 6 C2 1µF 2 C3 1µF J2 GND J7 GND Bill of Materials Item Part Number C1, C2, C3 R2, R3 C1608X5R0J105K CRCW06031002FKEYE3 U1 MIC5331-XXYMT Manufacturer (1) TDK (2) Vishay Micrel (3) Description Qty Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603 3 Resistor, 10kΩ, 1%, 1/16W, Size 0603 2 ® UCAP Dual 300mA LDO, Size 2mm x 2mm Thin MLF 1 Notes: 1. TDK: www.tdk.com 2. Vishay: www.vishay.com 3. Micrel, Inc.: www.micrel.com February 2008 8 M9999-021408-A Micrel, Inc. MIC5331 PCB Layout Recommendations 1350 (mil) 1400 (mil) Top Layer 1350 (mil) 1400 (mil) Bottom Layer February 2008 9 M9999-021408-A Micrel, Inc. MIC5331 Package Information 8-Pin 2mm x 2mm 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. © 2008 Micrel, Incorporated. February 2008 10 M9999-021408-A