MIC5396/7/8/9 Low-Power Dual 300mA LDO in 1.2mm x 1.6mm Extra Thin DFN General Description Features The MIC5396/7/8/9 is an advanced dual LDO ideal for powering general purpose portable devices. The MIC5396/7/8/9 provides two high-performance, independent 300mA LDOs in a single package. This makes it possible to improve system efficiency by providing two independent supply inputs that can be optimized for each individual LDO. The MIC5396/7/8/9 also features a wide output voltage range down to 1.0V. Its full feature set and low dropout voltage make it ideal for battery-powered applications. The MIC5396/7/8/9 offers 2% accuracy, low dropout voltage (160mV at 300mA), and low ground current (typically 42μA per LDO at full load). The MIC5396/7/8/9 can also be put into a zero off mode current state, drawing virtually no current when disabled. When the MIC5397/9 is disabled an internal resistive load is automatically applied to the output to discharge the output capacitor. In addition, the MIC5398/9 offers an internal enable pull-down resistor to ensure that the output is disabled when the enable is in tri-state mode. These LDO’s also offer fast transient response and high PSRR while consuming a minimum operating current. The family is available in a tiny 8-pin, 1.2mm x 1.6mm leadless Extra Thin DFN 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 Independent power inputs Output voltage range from 1V to 3.3V Two 300mA outputs High output accuracy (±2%) Low quiescent current – 37µA typical/LDO Stable with 1µF ceramic output capacitors Low dropout voltage (160mV at 300mA) Independent enable pins Internal enable pull-down (MIC5398, MIC5399) Output discharge circuit (MIC5397, MIC5399) Thermal-shutdown protection Current-limit protection 8-pin 1.2mm x 1.6mm Extra Thin DFN package Applications • • • • • Camera phones Mobile phones DSC, GPS, PMP and PDAs Portable medical devices Portable electronics _________________________________________________________________________________________________________________________ Typical Application Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com December 2012 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Ordering Information Part Number Marking (1) VOUT1/VOUT2 EN Discharge Circuit Output Discharge Circuit Junction Temp. Range Package MIC5396-GMYMX F2 1.8V/2.8V –– – –40° to +125°C 8-Pin 1.2x1.6 XTDFN MIC5397-GPYMX D4 1.8V/3.0V – X –40° to +125°C 8-Pin 1.2x1.6 XTDFN MIC5398-P4YMX E5 3.0V/1.2V X – –40° to +125°C 8-Pin 1.2x1.6 XTDFN MIC5399-SSYMX H4 3.3V/3.3V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN MIC5399-SMYMX H6 3.3V/2.8V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN MIC5399-SGYMX H5 3.3V/1.8V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN MIC5399-MMYMX H7 2.8V/2.8V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN MIC5399-GPYMX H8 1.8V/3.0V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN MIC5399-GMYMX H1 1.8V/2.8V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN (3) Notes: 1. Other voltages are available. Contact Micrel for details. 2. Extra Thin DFN is a GREEN RoHS-compliant package. Level finish is NiPdAu. Mold compound is Halogen Free. 3. Contact Micrel Marketing to order. Pin Configuration 8-Pin 1.2mm x 1.6mm Extra Thin DFN (MX) Pin Description Pin Number Pin Name 1, 4 GND 2 VOUT1 Output regulator 1: Connect a capacitor to ground. 3 VOUT2 Output regulator 2: Connect a capacitor to ground. 5 EN2 Enable input for regulator 2: Active-high input. Logic high = On; Logic low = Off. MIC5396/7 Do not leave floating. MIC5398/9 internal pull-down resistor, tri-state = Off. 6 VIN2 Input voltage supply for regulator 2: Connect a capacitor to ground. 7 VIN1 Input voltage supply for regulator 1: Connect a capacitor to ground. 8 EN1 Enable input for regulator 1. Active-high input. Logic high = On; Logic low = Off. MIC5396/7 Do not leave floating. MIC5398/9 internal pull-down resistor, tri-state = Off. EP ePad Heatsink pad: Connect to ground. December 2012 Pin Function Ground. 2 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN1, VIN2) ............................... –0.3V to +6V Enable Voltage (VEN1, VEN2). .............................. –0.3V to VIN (3) Power Dissipation (PD) ........................... Internally Limited Lead Temperature (soldering, 10sec.) ....................... 260°C Junction Temperature (TJ) ........................ –40°C to +125°C Storage Temperature (Ts) ......................... –65°C to +150°C (4) ESD Rating .................................................................. 3kV Supply Voltage (VIN1, VIN2) .............................. +2.5V to 5.5V Enable Voltage (VEN1, VEN2). ................................... 0V to VIN Junction Temperature (TJ) ........................ –40°C to +125°C Junction Thermal Resistance 1.2mm x 1.6mm Extra Thin DFN (θJA).......... 172.6°C/W Electrical Characteristics(4) VIN1 = VEN1 = VOUT1 + 1V, VIN2 = VEN2 = VOUT2 + 1V, IOUT1 = IOUT2 = 100µA; CIN1 = CIN2 = COUT1 = COUT2 = 1µF; TJ = 25°C. Bold values indicate –40°C to +125°C, unless noted. Parameter Condition Min Output Voltage Accuracy Variation from nominal VOUT –2.0 Variation from nominal VOUT –3.0 Max +2.0 Units % +3.0 % 0.02 0.3 %/V 8 40 mV IOUT = 150mA 80 190 mV IOUT = 300mA 160 380 mV VEN1 = High; VEN2 = Low; IOUT1 = 0mA 37 55 µA VEN1 = Low; VEN2 = High; IOUT2 = 0mA 37 55 µA VEN1 = VEN2 = High; IOUT1 = IOUT2 = 0mA 74 110 µA VEN1 = High; VEN2 = Low; IOUT1 = 300mA 42 65 µA VEN1 = Low; VEN2 = High; IOUT2 = 300mA 42 65 µA VEN1 = VEN2 = High; IOUT1 = IOUT2 = 300mA 84 130 µA 0.05 1 Line Regulation VIN = VOUT +1V to 5.5V, IOUT = 100µA Load Regulation IOUT = 100µA to 300mA Dropout Voltage Ground Pin Current Typ Shutdown Current VEN1 = VEN2 = 0V Ripple Rejection f = 1kHz; COUT = 1µF Current Limit VOUT = 0V Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 93 µVRMS Auto-Discharge NFET Resistance MIC5397, MIC5399 Only; VEN1 = VEN2 = 0V; VIN = 3.6V; IOUT = –3mA 25 Ω MIC5398, MIC5399 4 60 400 630 µA dB 900 mA Enable Inputs (EN1/EN2) Enable Pull-Down Resistor Enable Input Voltage MΩ 0.2 Logic Low 1.2 Logic High V V Enable Input Current VEN = 0V 0.01 1 µA MIC5396, MIC5397 VEN = 5.5V 0.01 1 µA Enable Input Current VEN = 0V 0.01 1 µA MIC5398, MIC5399 VEN = 5.5V 1.4 2 µA Turn-on Time COUT = 1µF 50 125 µs Notes: 1. Exceeding the absolute maximum ratings can 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. December 2012 3 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Typical Characteristics -100 3.0 3.0 2.9 150mA 2.5 OUTPUT VOLTAGE (V) -80 -70 -60 100µA -50 -40 300mA -30 -20 VIN = 2.8V VOUT =1.8V COUT =1µF -10 LDO2-300mA LDO2-100µA 2.0 1.5 LDO1-100µA 1.0 VOUT1 = 1.8V VOUT2 = 2.8V CIN = COUT = 1µF 0.5 0 OUTPUT VOLTAGE (V) -90 PSRR (dB) Output Voltage vs. Output Current Output Voltage vs. Input Voltage Power Supply Rejection Ratio 100 100 1K 1,000 10K 100K 1,000,000 1M 10,000 100,000 2.5 3.0 FREQUENCY (Hz) 3.5 4.0 4.5 5.0 40 100µA 150mA 150mA 20 VOUT =2.8V CIN = COUT= 1µF 4.5 5.0 DUAL OUTPUT 70 60 SINGLE OUTPUT 50 40 30 VEN = 3.8V VIN = 3.8V VOUT =2.8V CIN = COUT = 1µF 20 50 INPUT VOLTAGE (V) Dropout Voltage vs. Output Current 150 200 250 100 80 60 VOUT = 2.8V CIN = COUT = 1µF 20 100 150 200 250 OUTPUT CURRENT (mA) December 2012 VIN = VEN = 3.8V VOUT = 2.8V CIN =COUT = 1µF 20 -20 300 0 20 40 60 80 100 120 Current Limit vs. Input Voltage 900 300mA 850 200 180 160 140 150mA 120 100 80 60 CIN = COUT =1µF 40 10mA 800 750 LDO2 700 650 LDO1 600 550 VOUT1 = 1.8V VOUT2 = 2.8V CIN = COUT = 1µF 500 450 400 0 50 30 TEMPERATURE (°C) 20 0 0 SINGLE OUTPUT 40 -40 300 CURRENT LIMIT (mA) DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) 100 220 40 60 50 10 240 120 300 70 Dropout Voltage vs. Temperature 140 250 DUAL OUTPUT OUTPUT CURRENT (mA) 160 200 0 0 180 150 Ground Current vs. Temperature 80 80 5.5 100 OUTPUT CURRENT (mA) 0 4.0 50 90 10 0 3.5 VIN2 = VEN2= VOUT2 +1V VOUT2 = 2.8V CIN = COUT = 1µF 0 GROUND CURRENT (µA) GROUND CURRENT ( µA) GROUND CURRENT (µA) 300mA 3.0 2.3 2.0 5.5 90 2.5 2.4 2.1 100 10 2.5 Ground Current vs. Output Current 60 30 2.6 INPUT VOLTAGE (V) Ground Current vs. Input Voltage 50 2.7 2.2 0.0 10 10 2.8 -40 -20 0 20 40 60 80 TEMPERATURE (°C) 4 100 120 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V) M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Typical Characteristics (Continued) Output Noise Spectral Density 10 VIN =VEN = 4.5V COUT = 1µF VOUT = 1.8V NOISE (µV/√Hz) 1 0.1 0.01 0.001 0.0001 10 10 100 100 1,000 1K 10,000 10K 100,000 100K 1,000,00010,000,000 1M 10M FREQUENCY (Hz) December 2012 5 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Functional Characteristics December 2012 6 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Functional Diagram MIC5396/7/8/9 Block Diagram December 2012 7 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Application Information Enable/Shutdown The MIC5396/7/8/9 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 an off mode current state drawing virtually zero current. When disabled, the MIC5397 and MIC5399 switch an internal 25Ω load on the regulator output to discharge the external capacitor. Forcing the enable pin high enables the output voltage. The MIC5396 and MIC5397 active-high enable pin uses CMOS technology and cannot be left floating. A floating enable pin may cause an indeterminate state on the output. The MIC5398 and MIC5399 have an internal pull-down resistor on the enable pin to disable the output when the enable pin is floating. MIC5396/7/8/9 is a dual 300mA LDO in a tiny 8-pin 1.2mm x 1.6mm extra thin DFN package. The MIC5397 and MIC5399 include an auto-discharge circuit for each LDO output, which is activated when the output is disabled. The MIC5398 and MIC5399 have an internal pull-down resistor on the enable pin to ensure that the output is disabled if the control signal is tri-stated. The MIC5396/7/8/9 regulator is fully protected from damage due to fault conditions using linear current limiting and thermal shutdown. Input Capacitor The MIC5396/7/8/9 is a high-performance, highbandwidth device. An input capacitor of 1µF is required from the input pin to ground to provide stability. LowESR ceramic capacitors provide optimal performance in a small board area. 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. Thermal Considerations The MIC5396/7/8/9 is designed to provide two 300mA continuous current outputs in a very small package. Maximum operating temperature can be calculated based on the output currents and the voltage drop across the part. For example, if the input voltage is 3.6V, VOUT1 = 3.3V, VOUT2 = 2.8V, each with an output current of 300mA. The actual power dissipation of the regulator circuit can be determined using the equation: Output Capacitor The MIC5396/7/8/9 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 and X5R dielectric ceramic capacitors are recommended because of their temperature performance. X7R 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 = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I OUT2 + VIN IGND Because this is a CMOS device and the ground current is typically <100µA over the load range, the power dissipation contributed by the ground current is <1% which can be ignored for this calculation. PD = (3.6V – 3.3V) × 300mA + (3.6V – 2.8V) × 300mA PD = 0.33W 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 No Load Stability Unlike many other voltage regulators, the MIC5396/7/8/9 will remain stable and in regulation with no load. December 2012 TJ(MAX) = 125°C θJA = 172.6°C/W 8 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Substituting PD for PD(MAX) and solving for the ambient operating temperature gives the maximum operating conditions for the regulator circuit. The junction to ambient thermal resistance for the minimum footprint is 172.6°C/W. For proper operation, do not exceed the maximum power dissipation. For example, when operating a 3.3V/2.8V application with an input voltage of 3.6V and 300mA at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.33W = (125°C – TA)/(172.6°C/W) TA = 68.04°C Therefore, a MIC5396-SMYMX application with 300mA at each output current can accept an ambient operating temperature of 68.04°C in a 1.6mm x 1.2mm Extra Thin DFN 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 December 2012 9 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Typical Application Schematic Bill of Materials Item Part Number Manufacturer (1) C1, C2 C1608X5R0J106K C3, C4 C1005X5R1A105K TDK R1, R2 CR0603100KFKEA Vishay U1 MIC5396/7/8/9-xxYMX TDK (2) (3) Micrel, Inc. Description Qty. Capacitor, 10µF Ceramic, 6.3V, X5R, Size 0603 2 Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 2 Resistor, 100kΩ, 1/16W, Size 0603 2 Dual, 300mA LDO, Size 1.2mm × 1.6mm Extra Thin DFN 1 Notes: 1. TDK: www.tdk.com. 2. Vishay: www.vishay.com. 3. Micrel, Inc.: www.website.com. December 2012 10 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 PCB Layout Recommendations Top Layer Bottom Layer December 2012 11 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 Package Information(1) 8-Pin 1.2mm x 1.6mm Thin DFN (MX) Note: 1. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com. December 2012 12 M9999-120712-A Micrel, Inc. MIC5396/7/8/9 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. © 2012 Micrel, Incorporated. December 2012 13 M9999-120712-A