MIC5388/9 Dual 200mA Peak LDO in Wafer Level Chip Scale Package General Description Features The MIC5388/9 is an advanced dual LDO ideal for powering general purpose portable devices. The MIC5388/9 provides two independently-controlled, highperformance, 200mA peak (150mA continuous) LDOs in a miniature 6-bump, 0.5mm pitch, 1.5mm × 1.0mm wafer level chip scale package (WLCSP). Ideal for battery-powered applications, the MIC5388/9 offers 2% accuracy, low dropout voltage (175mV @ 150mA) and low ground current (typically 32μA per LDO). The MIC5388/9 can also be put into a zero off mode current state, drawing virtually no current when disabled. When the MIC5389 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. 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 200mA peak output current LDOs High output accuracy (±2%) Low quiescent current (32µA per LDO) Stable with 1µF ceramic output capacitors Low dropout voltage (175mV at 150mA) Independent enable pins Output discharge circuit (MIC5389) Thermal-shutdown protection Current-limit protection 6-bump 1.5mm × 1.0mm WLCSP package Applications • • • • • Camera phones Mobile phones DSC, GPS, PMP, and PDAs Portable medical devices Portable electronics _________________________________________________________________________________________________________________________ Typical Application Camera Module Power Supply Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com July 2011 M9999-071211-A Micrel, Inc. MIC5388/9 Ordering Information Manufacturing Part Number(1, 2) Marking Code VOUT1/VOUT2 Junction Temperature Range Package Voltage MIC5388-SGYCS* 8A8 3.3V/1.8V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5388-MMYCS* 8B8 2.8V/2.8V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5388-MLYCS* 8C8 2.8V/2.7V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5388-MGYCS 8D8 2.8V/1.8V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5388-M4YCS* 8E8 2.8V/1.2V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5388-G4YCS* 8F8 1.8V/1.2V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5389-SGYCS* 8A9 3.3V/2.8V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5389-MMYCS* 8B9 2.8V/2.8V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5389-MLYCS* 8C9 2.8V/2.7V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5389-MGYCS 8D9 2.8V/1.8V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5389-M4YCS* 8E9 2.8V/1.2V –40° to +125°C 6-Bump Wafer Level Chip Scale Package MIC5389-G4YCS* 8F9 1.8V/1.2V –40° to +125°C 6-Bump Wafer Level Chip Scale Package Notes: 1. Other voltages available. Contact Micrel Marketing for details. 2. MIC5389 offers auto-discharge function. * Contact Micrel Marketing for availability. Pin Configuration Ball A1 Identifier TOP VIEW BOTTOM VIEW 6-Bump, 0.5mm Pitch WLCSP (CS) Pin Description Pin Number Pin Name A1 EN1 Enable Regulator 1. Active High Input. Logic High = On; Logic Low = Off. Do not leave floating. B1 GND Ground. C1 EN2 Enable Regulator 2. Active High Input. Logic High = On; Logic Low = Off. Do not leave floating. C2 VOUT2 B2 VIN A2 VOUT1 July 2011 Pin Function Regulator Output − LDO2 Voltage Supply Input. Regulator Output − LDO1 2 M9999-071211-A Micrel, Inc. MIC5388/9 Functional Block Diagrams MIC5388 Block Diagram MIC5389 Block Diagram July 2011 3 M9999-071211-A Micrel, Inc. MIC5388/9 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 (TA) ........................ –40°C to +125°C Junction Thermal Resistance 6-Bump, 0.5mm Pitch WLCSP (θJA) ................108°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. Typ. Max. Variation from nominal VOUT –2.0 +2.0 Variation from nominal VOUT; –40°C to +125°C –3.0 +3.0 Units % Line Regulation VIN = VOUT +1V to 5.5V, IOUT = 100µA 0.02 0.3 %/V Load Regulation IOUT = 100µA to 150mA 0.3 1.2 % IOUT = 50mA 55 110 IOUT = 150mA 175 310 VEN1 = High; VEN2 = Low; IOUT = 0mA 32 45 VEN1 = Low; VEN2 = High; IOUT = 0mA 32 45 VEN1 = VEN2 = High; IOUT1 = IOUT2 = 0mA 60 85 0.05 1 Dropout Voltage Ground Pin Current mV µA Ground Pin Current in Shutdown VEN1 = VEN2 = 0V Ripple Rejection f = 1kHz; COUT = 1µF Current Limit VOUT = 0V Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 175 µVRMS Auto-Discharge NFET Resistance MIC5389 Only; VEN1 = VEN2 = 0V; VIN = 3.6V 30 Ω 73 200 325 µA dB 550 mA Enable Inputs (EN1/EN2) Enable Input Voltage Enable Input Current Turn-On Time 0.2 Logic Low 1.2 Logic High 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. July 2011 4 M9999-071211-A Micrel, Inc. MIC5388/9 Typical Characteristics Output Voltage vs. Input Voltage Power Supply Rejection Ratio -100 OUTPUT VOLTAGE (V) -60 50mA -50 150mA ` -40 -30 V IN = V EN = 4.1V -20 1.5 10 LDO2 150mA 1 VOUT1 = 2.8V VOUT2 = 1.8V 0.5 COUT1 = 1µF/10V 0 1000 10000 2.5 100000 3 3.5 FREQUENCY(Hz) 2.80 2.70 Ground Current vs. Input Voltage 4 4.5 5 2.50 5.5 10 39 150mA 100µA 33 31 VIN = VEN2 27 CIN = COUT = 1μF VOUT2 = 1.8V 3 4 4.5 5 70 60 50 SINGLE OUTPUT 40 30 VIN = 3.8V 20 VOUT1 = 2.8V VOUT2 = 1.8V CIN = COUT = 1μF 0 5.5 15 30 DROPOUT VOLTAGE (mV) 75 50 VOUT1 = 2.8V 25 CIN = COUT = 1μF 20 40 60 80 100 120 OUTPUT CURRENT (mA) July 2011 60 75 SINGLE OUTPUT 50mA 40 30 140 VIN = V EN = 3.8V SINGLE OUTPUT 100µA 20 VOUT1 = 2.8V VOUT2 = 1.8V 10 CIN = COUT = 1µF 0 90 -40 105 120 135 150 -20 0 20 40 160 60 80 100 120 TEMPERATURE (°C) Current Limit vs. Input Voltage 200 150mA 180 160 100mA 140 120 100 50mA 80 60 40 LDO2 400 300 LDO1 200 VOUT1 = 2.8V 100 VOUT2 = 1.8V 10mA CIN = COUT = 1μF 20 0 0 45 50 CIN = COUT = 1μF 220 100 150 500 240 125 130 60 Dropout Voltage vs. Temperature Dropout Voltage vs. Output Current 150 110 DUAL OUTPUT 100µA 70 OUTPUT CURRENT (mA) INPUT VOLTAGE (V) 175 90 80 0 3.5 70 Ground Current vs. Temperature DUAL OUTPUT 10 25 2.5 50 OUTPUT CURRENT (mA) GROUND CURRENT (μA) GROUND CURRENT (μA) 41 29 30 Ground Current vs. Output Current 80 35 VOUT1 = 2.8V CIN = COUT = 1µF 90 37 VIN = V EN = V OUT + 1V 2.60 INPUT VOLTAGE (V) 43 GROUND CURRENT (μA) 2.90 CIN = COUT = 1μF 0 100 45 LDO2 100μA 2 V OUT1 = 2.80V -10 LDO1 100μA CURRENT LIMIT (mA) PSRR (dB) -70 LDO1 150mA 2.5 OUTPUT VOLTAGE (V) 100µA -80 DROPOUT VOLTAGE (mV) 3.00 3 -90 Output Voltage vs. Output Current 0 0 -40 -20 0 20 40 60 80 TEMPERATURE (°C) 5 100 120 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) M9999-071211-A Micrel, Inc. MIC5388/9 Typical Characteristics (Continued) Output Noise Spectral Density Enable Voltage Threshold vs. Input Voltage 1.2 10 1 0.9 1 EN1 ON NOISE (µV/√Hz) ENABLE VOLTAGE (V) 1.1 0.8 0.7 0.6 EN1 OFF 0.5 0.4 V OUT1 = 2.8V 0.3 0.1 VIN = 5.21V 0.01 0.2 0.1 2.5 3 3.5 4 4.5 INPUT VOLTAGE (V) July 2011 5 VOUT2 = 1.815V(100µA) CIN = COUT2 = 1µF Noise Output (10Hz100Khz) = 174.54 µVrms CIN = COUT = 1μF IL = 150mA 5.5 0.001 10 100 1,000 10,000 100,000 FREQUENCY (Hz) 6 M9999-071211-A Micrel, Inc. MIC5388/9 Functional Characteristics July 2011 7 M9999-071211-A Micrel, Inc. MIC5388/9 Application Information Enable/Shutdown The MIC5388/9 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 a “zero” off mode current state. In this state, current consumed by the regulator goes nearly to zero. When disabled the MIC5389 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. MIC5388/9 is a dual 150mA LDO in a miniature 6-bump WLCSP package. The MIC5389 includes an autodischarge circuit for each of the LDO outputs that are activated when the output is disabled. The MIC5388/9 regulator is fully protected from damage due to fault conditions through linear current limiting and thermal shutdown. Input Capacitor The MIC5388/9 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. Thermal Considerations The MIC5388/9 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: Output Capacitor The MIC5388/9 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/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 = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I VIN IGND OUT2 + 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 + (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: No-Load Stability Unlike many other voltage regulators, the MIC5388/9 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. ⎛ TJ(MAX) − TA PD(MAX) = ⎜⎜ θ JA ⎝ ⎞ ⎟ ⎟ ⎠ TJ(max) = 125°C, and the maximum junction temperature of the die, θJA, thermal resistance = 108°C/W. July 2011 8 M9999-071211-A Micrel, Inc. MIC5388/9 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 108°C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5388-MGYCS 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 82.88°C in a miniature 6-bump 0.5mm pitch 1.5mm × 1.0mm WLCSP 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)/(108°C/W) TA = 82.88°C July 2011 9 M9999-071211-A Micrel, Inc. MIC5388/9 MIC5388/9 Schematic Bill of Materials Item Part Number C1, C2, C3 C1005X5R1A105K U1 MIC5388/9-XXYCS Manufacturer TDK(1) Micrel, Inc. (2) Description Qty. 1µF,10V Ceramic Capacitor, X5R, 0402 3 Dual, 200mA Peak LDO in Wafer Level Chip Scale Package 1 Notes: 1. TDK: www.tdk.com. 2. Micrel, Inc.: www.micrel.com. July 2011 10 M9999-071211-A Micrel, Inc. MIC5388/9 PCB Layout Recommendations Top Layer Bottom Layer July 2011 11 M9999-071211-A Micrel, Inc. MIC5388/9 Package Information 6-Bump, 0.5mm Pitch 1.5mm × 1.0mm Wafer Level Chip-Scale Package (CS) 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. © 2011 Micrel, Incorporated. July 2011 12 M9999-071211-A