MIC5370/1 High-Performance Dual 150mA LDO 1.6mm x 1.6mm Thin MLF® General Description Features The MIC5370/1 is an advanced dual LDO ideal for powering general purpose portable devices. The MIC5370/1 provides two independently-controlled, highperformance 150mA LDOs in a tiny 1.6mm x 1.6mm Thin MLF® package. Ideal for battery-powered applications, the MIC5370/1 offers 2% initial accuracy, low dropout voltage (155mV @ 150mA) and low ground current (typically 32μA per LDO). The MIC5370/1 can also be put into a zero-off-mode current state, drawing virtually no current when disabled. When the MIC5371 is disabled an internal resistive load is automatically applied to the output to discharge the output capacitor. This LDO offers fast transient response and high PSRR while consuming a minimum operating current. The MIC5370/1 is available in fixed output voltages in a lead-free (RoHS-compliant) 6-pin 1.6mm x 1.6mm Thin MLF® package. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. • 2.5V to 5.5V input voltage range • Two 150mA output current LDOs • High output accuracy – ±2% initial accuracy • Low quiescent current – 32µA per LDO • Stable with 1µF ceramic output capacitors • Independent enable pins • Low dropout voltage – 155mV at 150mA • Thermal-shutdown protection • Current-limit protection • Output discharge circuit – MIC5371 • 6-pin 1.6mm x 1.6mm Thin MLF® package Applications • • • • Camera phones Mobile phones GPS, PMP, PDAs and handhelds Portable electronics ___________________________________________________________________________________________________________ Typical Application MIC5370/1-xxYMT VBAT 1µF VIN VOUT1 I/O EN1 VOUT2 VCORE 1µF EN2 1µF GND Camera DSP Power Supply Circuit 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 May 2011 M9999-052011-C Micrel, Inc. MIC5370/1 Block Diagrams VIN VOUT1 LDO1 LDO2 EN1 EN2 VOUT2 ENABLE REFERENCE GND MIC5370 Block Diagram VIN VOUT1 LDO1 LDO2 EN1 EN2 VOUT2 ENABLE AUTO DISCHARGE REFERENCE GND MIC5371 Block Diagram May 2011 2 M9999-052011-C Micrel, Inc. MIC5370/1 Ordering Information Part Number Manufacturing Part Number Marking Code Voltage Junction Temperature Range Package Lead Finish MIC5370-3.3/3.3YMT MIC5370-SSYMT 8SS 3.3V/3.3V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-3.3/3.0YMT MIC5370-SPYMT SP8 3.3V/3.0V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-3.3/2.8YMT MIC5370-SMYMT SM8 3.3V/2.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-3.3/2.6YMT MIC5370-SKYMT S8K 3.3V/2.6V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-3.3/1.8YMT MIC5370-SGYMT SG8 3.3V/1.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-3.0/3.0YMT MIC5370-PPYMT P8P 3.0V/3.0V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-3.0/2.8YMT MIC5370-PMYMT PM8 3.0V/2.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-3.0/2.6YMT MIC5370-PKYMT P8K 3.0V/2.6V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-3.0/1.8YMT MIC5370-PGYMT PG8 3.0V/1.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-2.8/2.8YMT MIC5370-MMYMT MM8 2.8V/2.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-2.8/2.6YMT MIC5370-MKYMT M8K 2.8V/2.6V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-2.8/1.8YMT MIC5370-MGYMT MG8 2.8V/1.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-2.8/1.5YMT MIC5370-MFYMT MF8 2.8V/1.5V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-2.8/1.2YMT MIC5370-M4YMT J48 2.8V/1.2V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-1.8/1.2YMT MIC5370-G4YMT 8G4 1.8V/1.2V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5370-1.2/1.0YMT MIC5370-4CYMT 84C 1.2V/1.0V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-3.3/3.3YMT* MIC5371-SSYMT 9SS 3.3V/3.3V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-3.3/3.0YMT* MIC5371-SPYMT 9SP 3.3V/3.0V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-3.3/2.8YMT* MIC5371-SMYMT 9SM 3.3V/2.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-3.3/1.8YMT* MIC5371-SGYMT 9SG 3.3V/1.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-3.0/3.0YMT* MIC5371-PPYMT 9PP 3.0V/3.0V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free May 2011 3 M9999-052011-C Micrel, Inc. MIC5370/1 Ordering Information (Continued) Part Number Manufacturing Part Number Marking Code Voltage Junction Temperature Range Package Lead Finish MIC5371-3.0/2.8YMT* MIC5371-PMYMT 9PM 3.0V/2.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-2.8/2.8YMT* MIC5371-MMYMT 9MM 2.8V/2.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-2.8/1.8YMT* MIC5371-MGYMT 9MG 2.8V/1.8V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-2.8/1.5YMT* MIC5371-MFYMT 9MF 2.8V/1.5V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-2.8/1.2YMT* MIC5371-M4YMT 9M4 2.8V/1.2V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-1.8/1.2YMT* MIC5371-G4YMT 9G4 1.8V/1.2V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free MIC5371-1.2/1.0YMT* MIC5371-4CYMT 94C 1.2V/1.0V –40°C to +125°C 6-Pin 1.6mm × 1.6mm ® Thin MLF Pb-Free Note: 1. Other voltages available. Contact Micrel for details. 2. Thin MLF Pin 1 Identifier = ▲ 3. Thin MLF is a GREEN RoHS-compliant package. Level finish is NiPdAu. Mold compound is Halogen Free. * MIC5371 offers Auto-Discharge function. ® ® May 2011 4 M9999-052011-C Micrel, Inc. MIC5370/1 Pin Configuration VIN 1 6 VOUT1 GND 2 5 VOUT2 EN2 3 4 EN1 6-Pin 1.6mm x 1.6mm Thin MLF® (MT) Pin Description Pin Number Pin Name Pin Function 1 VIN Supply Input 2 GND Ground 3 EN2 Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off; Do not leave floating. 4 EN1 Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off; Do not leave floating. 5 VOUT2 Regulator Output – LDO2 6 VOUT1 Regulator Output – LDO1 EPAD HS Pad Heatsink Pad internally connected to ground. May 2011 5 M9999-052011-C Micrel, Inc. MIC5370/1 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) ........................................ –0.3V to +6V Enable Voltage (VEN1, VEN2)............................... –0.3V to VIN Power Dissipation (PD) ........................... Internally Limited(3) Lead Temperature (soldering, 10sec.)....................... 260°C Junction Temperature (TJ) ........................–40°C to +125°C Storage Temperature (Ts) .........................–65°C to +150°C ESD Rating(4) .................................................................. 2kV Supply Voltage (VIN)....................................... +2.5V to 5.5V Enable Voltage (VEN1, VEN2)............................... –0.3V to VIN Junction Temperature (TJ) ........................ –40°C to +125°C Junction Thermal Resistance 1.6x1.6 Thin MLF®-6 (θJA) .................................90°C/W Electrical Characteristics(5) VIN = VEN1 = VEN2 = VOUT + 1V; higher of the two regulator outputs; IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted. Parameter Output Voltage Accuracy Condition Min. 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 %/V Load Regulation IOUT = 100µA to 150mA 0.3 1 % IOUT = 50mA 55 IOUT = 150mA 155 VEN1 = High; VEN2 = Low; IOUT = 0mA 32 45 VEN1 = Low; VEN2 = High; IOUT = 0mA 32 45 VEN1 = VEN2 = High; IOUT1 = IOUT2 = 0mA 57 85 0.05 1 µA 550 mA Dropout Voltage Ground Pin Current Ground Pin Current in Shutdown VEN1 = VEN2 = 0V 110 310 mV µA Ripple Rejection f = 1kHz; COUT = 1µF Current Limit VOUT = 0V 60 Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 200 µVRMS Auto-Discharge NFET Resistance MIC5371 Only; VEN1 = VEN2 = 0V; VIN = 3.6V 30 Ω 200 325 dB Enable Inputs (EN1/EN2) Enable Input Voltage Enable Input Current Turn-on Time Logic Low 0.2 Logic High 1.2 VIL ≤ 0.2V 0.01 1 VIH ≥ 1.2V 0.01 1 COUT = 1µF 50 125 V 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. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF. 5. Specification for packaged product only. May 2011 6 M9999-052011-C Micrel, Inc. MIC5370/1 Typical Characteristics Power Supply Rejection Ratio Output Voltage vs. Input Voltage 3.0 100µA LDO1-150mA 2.5 2.85 LDO1-100µA 2.0 50mA 150mA 2.90 Output Voltage vs. Output Current 1.5 LDO2-100µA LDO2-150mA 2.80 1.0 VIN = VEN = 3.8V VOUT = 1.8V COUT = 1µF 0 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Ground Current vs. Input Voltage 40 50mA 38 24 22 20 2.5 180 VIN = VEN = 2.8V VOUT2 = 1.8V CIN = COUT = 1µF 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 Dropout Voltage vs. Output Current 60 55 07 5 100 125 150 OUTPUT CURRENT (mA) Ground Current vs. Temperature Dual Outputs(100µA) 40 Single Output VIN = 3.8V VOUT1 = 2.8V VOUT2 = 1.2V CIN = COUT = 1µF 20 10 0 02 250 55 07 5 100 125 150 OUTPUT CURRENT (mA) Dropout Voltage vs. Temperature CIN = C OUT = 1µF 200 150m A Single Output(50mA) 30 Single Output(100µA) 20 VIN = V EN = 3.8V VOUT1 = 1.8V VOUT2 = 2.8V CIN = C OUT = 1µF 10 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 500 Current Limit vs. Input Voltage 400 LDO2 150 80 100m A 100 60 May 2011 2.70 02 VIN = VEN = VOUT + 1V VOUT = 2.8V CIN = COUT = 1µF 50 30 100 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 2.5 Dual Output 40 100µA 120 0 02 Ground Current vs. Output Current 50 140 20 5.5 2.75 60 160 40 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 70 34 150mA 32 26 0 2.5 80 36 30 28 VOUT1 = 2.8V VOUT2 = 1.8V CIN = COUT =1µF 0.5 300 LDO1 200 50mA VOUT = 2.8V CIN = COUT = 1µF 55 07 5 100 125 150 OUTPUT CURRENT (mA) Enable Voltage vs. Input Voltage 50 100 10mA 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 10 0 2.5 VOUT1 = 1.8V VOUT2 = 2.8V CIN = COUT = 1µF 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 Output Noise Spectral Density 1 EN1 ON 0.1 EN1 OFF VOUT1 = 2.5V CIN = COUT = 1µF Load = 150mA 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 0.01 0.001 10 VIN = 4.5V VOUT = 1V COUT1 = C OUT2 1µF 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 7 M9999-052011-C Micrel, Inc. MIC5370/1 Functional Characteristics May 2011 8 M9999-052011-C Micrel, Inc. MIC5370/1 When disabled the MIC5371 switches a 30Ω (typical) load on the regulator output to discharge the external capacitor. 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.. Application Information MIC5370/1 is a dual 150mA LDO in a small 1.6mm x 1.6mm package.. The MIC5371 includes an autodischarge circuit for each of the LDO outputs that are activated when the output is disabled. The MIC5370/1 regulator is fully protected from damage due to fault conditions through linear current limiting and thermal shutdown. Thermal Considerations The MIC5370/1 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. For example if the input voltage is 3.6V, the output voltage is 2.8V for VOUT1, 1.8V for VOUT2 and the output current = 150mA. The actual power dissipation of the regulator circuit can be determined using the equation: Input Capacitor The MIC5370/1 is a high-performance, high bandwidth device. An input capacitor of 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. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. 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: Output Capacitor The MIC5370/1 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. PD = (3.6V – 2.8V) × 150mA + (3.6V - 1.8) × 150mA PD = 0.39W 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: ⎛ 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. No-Load Stability Unlike many other voltage regulators, the MIC5370/1 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. 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. Enable/Shutdown The MIC5370/1 comes with two 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. May 2011 ⎞ ⎟ ⎟ ⎠ 9 M9999-052011-C Micrel, Inc. MIC5370/1 For example, when operating the MIC5370-MGYMT at an input voltage of 3.6V and 150mA loads at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: Therefore, a 2.8V/1.8V application with 150mA at each output current can accept an ambient operating temperature of 89.9°C in a 1.6mm 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 0.39W = (125°C – TA)/(90°C/W) TA = 89.9°C May 2011 10 M9999-052011-C Micrel, Inc. MIC5370/1 U1 MIC5370/1-xxYMT J1 VIN 1 VIN VOUT1 VOUT2 J7 EN1 3 EN1 GND C3 1µF/10V 2 EN2 J3 VOUT1 J5 VOUT2 J8 EN2 6 5 4 C1 1µF/10V C2 1µF/10V J2 GND J4 GND J6 GND Bill of Materials Item Part Number Manufacturer Description C1, C2, C3 GRM188R60J225KE19D Murata(1) Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 U1 MIC5370/1-XXYMT Micrel (2) Qty. 3 ® Dual, 150mA LDO, Size 1.6mm x 1.6mm Thin MLF 1 Notes: 1. Murata: www.murata.com 2. Micrel, Inc.: www.micrel.com May 2011 11 M9999-052011-C Micrel, Inc. MIC5370/1 PCB Layout Recommendations Top Layer Bottom Layer May 2011 12 M9999-052011-C Micrel, Inc. MIC5370/1 Package Information 6-Pin 1.6mm 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 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. © 2008 Micrel, Incorporated. May 2011 13 M9999-052011-C