MIC5322 Dual, High Performance 150mA µCap ULDO™ General Description Features The MIC5322 is a tiny Dual Ultra Low-Dropout (ULDO™) linear regulator ideally suited for those applications that require high Power Supply Rejection Ratio (PSRR). It provides a bypass pin to increase PSRR for noise sensitive portable electronics. The MIC5322 integrates two high-performance; 150mA ULDOs into a very compact 1.6mm x 1.6mm leadless Thin MLF® package with exceptional thermal package characteristics. The MIC5322 is a µCap design which enables operation with very small ceramic output capacitors for stability, thereby reducing required board space and component cost. The combination of extremely low-drop-out voltage, very high power supply rejection, very low output noise and exceptional thermal package characteristics makes it ideal for powering RF applications, cellular phones, GPS, imaging sensors for digital still cameras, PDAs, MP3 players and other portable applications. The MIC5322 ULDO™ is available in fixed-output voltages in a tiny 6-pin 1.6mm x 1.6mm leadless Thin MLF® package which is only 2.56mm2 in area, - 30% less area than the SOT-23, TSOP and MLF® 3x3 packages. Additional voltage options are available. For more information, contact Micrel marketing department. 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 • Ultra-low dropout voltage ULDO™ 35mV @ 150mA • Tiny 6-pin 1.6mm x 1.6mm Thin MLF® leadless package • Bypass pin for improved noise performance • High PSRR – >75dB on each LDO • Ultra low noise output - > 30µVrms • Dual 150mA outputs • µCap stable with 1µF ceramic capacitor • Low quiescent current – 150µA • Fast turn-on time – 45µs • Thermal shutdown protection • Current Limit protection Applications • • • • • • Mobile phones GPS receivers Portable media players Digital still and video cameras PDAs Portable electronics Typical Application MIC5322-x.xYMT VIN 1µF VOUT 1 RF VOUT 2 Core EN BYP GND 1µF 1µF GPS Module 0.01µF RF 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 March 2008 M9999-030608-A Micrel, Inc. MIC5322 Ordering Information Part number Marking Manufacturing Part Number (1) Voltage(2) Package Junction Temp. Range MIC5322-2.8/1.5YMT MIC5322-MFYMT VMF 2.8V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® MIC5322-2.8/1.8YMT MIC5322-MGYMT VMG 2.8V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® MIC5322-2.85/2.85YMT MIC5322-NNYMT VNN 2.85V/2.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® MIC5322-3.0/2.8YMT MIC5322-PMYMT VPM 3.0V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® MIC5322-3.0/2.85YMT MIC5322-PNYMT VPN 3.0V/2.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® MIC5322-3.0/3.0YMT MIC5322-PPYMT VPP 3.0V/3.0V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® Notes: 1. Pin 1 identifier = ▲ 2. For other voltage options. Contact Micrel Marketing for details. Pin Configuration VIN 1 6 VOUT1 GND 2 5 VOUT2 BYP 3 4 EN 6-Pin 1.6mm x 1.6mm Thin MLF® (MT) Top View Pin Description Pin Number Thin MLF-6 Pin Name Pin Function 1 VIN Supply Input. 2 GND Ground 3 BYP Reference Bypass: Connect external 0.01µF to GND to reduce output noise. May be left open. 4 /EN Enable Input (both regulators): Active Low Input. Logic High = OFF; Logic Low = ON; Do not leave floating. 5 VOUT2 Regulator Output – LDO2 6 VOUT1 Regulator Output – LDO1 March 2008 2 M9999-030608-A Micrel, Inc. MIC5322 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) .....................................0V to +6V Enable Input Voltage (V/EN) ..........................0V to +6V Power Dissipation………………….Internally Limited(3) Lead Temperature (soldering, 3sec) ..................260°C Storage Temperature (TS) ................ –65°C to +150°C ESD Rating(4) .........................................................2kV Supply Voltage (VIN).............................. +2.3V to +5.5V Enable Input Voltage (V/EN) ............................. 0V to VIN Junction Temperature (TJ) ................. –40°C to +125°C Junction Thermal Resistance 6-pin 1.6mmx1.6mm Thin MLF® (θJA) .... 100°C/W Electrical Characteristics(5) VIN = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; V/EN = 0V; COUT1 = COUT2 = 1µF; CBYP = 0.01µF; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted. Parameter Conditions Min Output Voltage Accuracy Variation from nominal VOUT Variation from nominal VOUT; –40°C to +125°C Line Regulation Load Regulation Dropout Voltage (6) Typ Max Units -2.0 +2.0 % -3.0 +3.0 % VIN = VOUT + 1V to 5.5V; IOUT = 100µA 0.02 0.3 0.6 %/V %/V IOUT = 100µA to 150mA 0.5 2.0 % IOUT = 100µA 0.1 IOUT = 50mA 12 IOUT = 100mA mV 50 mV 25 75 mV mV IOUT = 150mA 35 100 Ground Current V/EN = Low; IOUT1 = 150mA; IOUT2 = 150mA 150 190 µA Ground Current in Shutdown V/EN = High 0.01 2 µA Ripple Rejection f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF 75 dB f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF 45 dB 300 Current Limit VOUT = 0V Output Voltage Noise COUT = 1.0µF; CBYP = 0.01µF; 10Hz to 100kHz 550 950 30 mA µVRMS Enable Inputs (/EN) Enable Input Voltage 0.2 Logic Low 1.2 Logic High Enable Input Current V V VIL ≤ 0.2V 0.01 1 µA VIH ≥ 1.2V 0.01 1 µA COUT = 1.0µF; No CBYP 40 100 µs COUT = 1.0µF; CBYP = 0.01µF 45 100 µs Turn-on Time (See Timing Diagram) 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, 1.5k in series with 100pF. 5. Specification for packaged product only. 6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below it’s nominal VOUT. For outputs below 2.3V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V March 2008 3 M9999-030608-A Micrel, Inc. MIC5322 Functional Diagram VIN VOUT 1 LDO1 LDO2 VOUT 2 EN Enable BYP Reference GND MIC5322 Block Diagram March 2008 4 M9999-030608-A Micrel, Inc. MIC5322 Typical Characteristics -90 Power Supply Rejection Ratio 40 -80 35 -70 30 -60 50mA -40 -30 VIN = VOUT +1V VOUT = 2.8V 150mA -20 COUT = 1µF C = 0.1µF -10 BYP /EN = Low 0 0.1 1 10 100 1,000 FREQUENCY (kHz) Ground Current vs. Temperature 20 15 10 0 0 150 150 140 140 135 125 120 3.00 2.95 VIN = VOUT + 1V VOUT = 3V COUT = 1µF /EN = Low 20 40 60 80 TEMPERATURE (°C) Output Voltage vs. Temperature 2.55 2.50 1.60 162 100mA 50mA 10mA 100µA 20 40 60 80 TEMPERATURE (°C) Ground Current vs. Output Current 150mA 154 150 146 VIN = VOUT + 1V VOUT = 3V COUT = 1µF /EN = Low 130 125 120 142 138 0 20 40 60 80 TEMPERATURE (°C) Output Voltage vs. Input Voltage 3.0 2.90 VIN = VOUT + 1V VOUT = 2.85V /EN = Low COUT1 = COUT2 = 1µF 25 50 75 100 125 150 OUTPUT CURRENT (mA) Output Voltage vs. Output Current 2.8V 2.85 2.0 1.5 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF /EN = Low 20 40 60 80 TEMPERATURE (°C) Output Voltage vs. Output Current 1.55 1.50 1.45 VIN = VOUT + 1V VOUT = 1.5V COUT1 = COUT2 = 1µF /EN = Low 1.40 0 25 50 75 100 125 150 OUTPUT CURRENT (mA) March 2008 30 25 20 15 10 5 0 150mA 158 2.5 2.90 2.85 2.80 2.75 2.70 2.65 2.60 Ground Current vs. Temperature 145 135 130 25 50 75 100 125 150 OUTPUT CURRENT (mA) 160 155 100µA VOUT = 2.8V COUT = 1µF /EN = Low 5 155 145 50 VOUT = 2.8V 45 COUT = 1µF 40 /EN = Low 35 25 -50 160 Dropout Voltage vs. Temperature Dropout Voltage vs. Output Current 2.80 1.5V 1.0 IOUT = 100µA COUT = 1µF /EN = Low 0.5 0.0 0 610 600 1 2 3 4 5 INPUT VOLTAGE (V) 6 Current Limit vs. Input Voltage 10 590 580 570 560 Output Noise Spectral Density 1 0.1 550 540 530 520 510 3 2.75 VIN = VOUT + 1V VOUT = 2.8V COUT1 = COUT2 = 1µF /EN = Low 2.70 0 25 50 75 100 125 150 OUTPUT CURRENT (mA) /EN = Low COUT = 1µF 3.5 4 4.5 5 INPUT VOLTAGE (V) 5 5.5 VIN = 3.8V 0.01 VOUT = 2.8V COUT = 1µF CBYP = 0.01µF /EN = Low 0.001 0.01 0.1 1 10 100 1,000 10,000 FREQUENCY (kHz) M9999-030608-A Micrel, Inc. MIC5322 Functional Characteristics March 2008 6 M9999-030608-A Micrel, Inc. MIC5322 Applications Information /Enable/Shutdown The MIC5322 comes with a single active-low enable pin that allows both regulators to be disabled simultaneously. Forcing the enable pin high disables the regulators and sends it into a “zero” off-modecurrent state. In this state, current consumed by the regulator goes nearly to zero. Forcing the enable pin low enables the output voltages. The active-low enable pin cannot be left floating since a floating enable pin may cause an indeterminate state on the output. Bypass Capacitor A capacitor can be placed from the noise bypass pinto-ground to reduce output voltage noise. The capacitor bypasses the internal reference. A 0.1µF 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 increases slightly with respect to bypass capacitance. A unique, quick-start circuit allows the MIC5322 to drive a large capacitor on the bypass pin without significantly slowing turn-on time. Refer to the Typical Characteristics section of this datasheet for performance with different bypass capacitors. Input Capacitor The MIC5322 is a high-performance, high bandwidth device. Therefore optimal performance can be achieved by providing a well-bypassed input supply. 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 high-frequency capacitors, such as smallvalued NPO dielectric-type capacitors, help filter out high-frequency noise and are good practice in any RF-based circuit. No-Load Stability Unlike many other voltage regulators, the MIC5322 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. Thermal Considerations The MIC5322 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. As an example: Given that the input voltage is 3.3V, the output voltage is 2.8V for VOUT1, 1.5V for VOUT2 and the output current at 150mA. The actual power dissipation of the regulator circuit can be determined using the equation: Output Capacitor The MIC5322 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 stable 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) IOUT2+ VIN IGND Because this device is CMOS and the ground current is typically <150µA over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. PD = (3.3V – 2.8V) × 150mA + (3.3V -1.5) × 150mA PD = 0.345W To determine the maximum ambient operating temperature of the package, use the junction-toambient thermal resistance of the device and the following basic equation: PD(MAX) = ⎛ ⎝ TJ(MAX) - TA JA TJ(max) = 125°C, the maximum junction temperature of the die θJA thermal resistance = 100°C/W. The table below shows junction-to-ambient thermal resistance for the MIC5322 in the Thin MLF® package. March 2008 7 M9999-030608-A Micrel, Inc. MIC5322 Package 6-Pin 1.6x1.6 Thin MLF ® θJA Recommended Minimum Footprint θJC 100°C/W 2°C/W For example, when operating the MIC5322-MFYMT at an input voltage of 3.3V and 150mA loads at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: Thermal Resistance 0.345W = (125°C – TA)/(100°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-to-ambient thermal resistance for the minimum footprint is 100°C/W. The maximum power dissipation must not be exceeded for proper operation. March 2008 TA = 90.5°C Therefore, a 2.8V/1.5V application with 150mA at each output current can accept an ambient operating temperature of 90.5°C in a 1.6mm x 1.6mm Thin 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 8 M9999-030608-A Micrel, Inc. MIC5322 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 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. © 2007 Micrel, Inc. March 2008 9 M9999-030608-A