MIC5320 High-Performance Dual 150mA µCap ULDO™ General Description Features The MIC5320 is a tiny Dual Ultra Low-Dropout (ULDO™) linear regulator ideally suited for portable electronics. It’s ideal for today’s most demanding ultra-thin portable applications including mobile phones, camera modules, imaging sensors for digital still and video cameras, PDAs, portable media players (PMP) and PC cameras. The MIC5320 integrates two high-performance, 150mA ULDOs into a tiny 6-pin 1.6mm x 1.6mm leadless Thin MLF® package, which provides exceptional thermal package characteristics. The MIC5320 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-dropout voltage, fast transient response and exceptional thermal package characteristics makes it ideal for portable electronics. The MIC5320 ULDO™ is available in fixed-output voltages in the tiny 6-pin 1.6mm x 1.6mm leadless Thin MLF® package which is only 2.56mm2 in area, less than 30% the area of the SOT-23, TSOP and MLF® 3x3 packages. It’s also available in the thin SOT-23-6 lead package and the standard 6-pin 1.6mm x 1.6mm leadless package. Additional voltage options are available. For more information, contact Micrel marketing department. Data sheets and supporting 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 Low-cost TSOT-23-6 package Independent enable pins 150mA output current per LDO µCap stable with 1µF ceramic capacitor Low quiescent current – 85µA per output Fast turn-on time – 30µs Thermal-shutdown protection Current-limit protection Applications • • • • • • Mobile phones PDAs GPS receivers Portable electronics Portable media players Digital still and video cameras Typical Application MIC5320-x.xYMT 1µF VIN VOUT 1 VOUT 1 EN 1 VOUT 2 VOUT 2 EN 2 GND 1µF 1µF Typical Application Circuit ULDO is a trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, 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 2011 M9999-021111-H Micrel, Inc. MIC5320 Ordering Information MIC5320-1.8/1.5YMT MIC5320-1.8/1.6YMT MIC5320-1.8/1.8YMT MIC5320-2.4/1.5YMT MIC5320-2.5/1.8YMT MIC5320-2.5/2.5YMT MIC5320-2.6/1.85YMT MIC5320-2.6/1.8YMT MIC5320-2.7/2.7YMT MIC5320-2.8/1.5YMT MIC5320-2.8/1.8YMT MIC5320-2.8/2.6YMT MIC5320-2.8/2.8YMT MIC5320-2.85/1.85YMT MIC5320-2.85/2.6YMT MIC5320-2.85/2.85YMT MIC5320-2.9/1.5YMT MIC5320-2.9/1.8YMT MIC5320-2.9/2.9YMT MIC5320-3.0/1.8YMT MIC5320-3.0/2.5YMT MIC5320-3.0/2.6YMT MIC5320-3.0/2.8YMT MIC5320-3.0/2.85YMT MIC5320-3.0/3.0YMT MIC5320-3.3/1.5YMT MIC5320-3.3/1.8YMT MIC5320-3.3/2.5YMT MIC5320-3.3/2.6YMT MIC5320-3.3/2.7YMT Manufacturing Part Number MIC5320-GFYMT MIC5320-GWYMT MIC5320-GGYMT MIC5320-H4FYMT MIC5320-JGYMT MIC5320-JJYMT MIC5320-KDYMT MIC5320-KGYMT MIC5320-LLYMT MIC5320-MFYMT MIC5320-MGYMT MIC5320-MKYMT MIC5320-MMYMT MIC5320-NDYMT MIC5320-NKYMT MIC5320-NNYMT MIC5320-OFYMT MIC5320-OGYMT MIC5320-OOYMT MIC5320-PGYMT MIC5320-PJYMT MIC5320-PKYMT MIC5320-PMYMT MIC5320-PNYMT MIC5320-PPYMT MIC5320-SFYMT MIC5320-SGYMT MIC5320-SJYMT MIC5320-SKYMT MIC5320-SLYMT*** MIC5320-3.3/2.8YMT MIC5320-SMYMT ASM 3.3V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® MIC5320-3.3/2.85YMT MIC5320-3.3/2.9YMT MIC5320-3.3/3.0YMT MIC5320-3.3/3.2YMT MIC5320-3.3/3.3YMT MIC5320-4.6/2.8YMT MIC5320-SNYMT MIC5320-SOYMT MIC5320-SPYMT MIC5320-SRYMT MIC5320-SSYMT MIC5320-46MYMT ASN ASO ASP ASR ASS 46M 3.3V/2.85V 3.3V/2.9V 3.3V/3.0V 3.3V/3.2V 3.3V/3.3V 4.6V/2.8V –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® MIC5320-2.5/1.8YML MIC5320-JGYML AJG 2.5V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-2.5/2.5YML MIC5320-JJYML*** AJJ 2.5V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-2.6/1.8YML MIC5320-KGYML AKG 2.6V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-2.7/2.7YML MIC5320-LLYML ALL 2.7V/2.7V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-2.8/1.5YML MIC5320-MFYML AMF 2.8V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-2.8/1.8YML MIC5320-MGYML AMG 2.8V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-2.8/2.8YML MIC5320-MMYML AMM 2.8V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-3.0/2.5YML MIC5320-PJYML APJ 3.0V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-3.0/2.6YML MIC5320-PKYML APK 3.0V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 MLF® Part Number February 2011 1.8V/1.5V 1.8V/1.6V 1.8V/1.8V 2.4V/1.5V 2.5V/1.8V 2.5V/2.5V 2.6V/1.85 2.6V/1.8V 2.7V/2.7V 2.8V/1.5V 2.8V/1.8V 2.8V/2.6V 2.8V/2.8V 2.85V/1.85V 2.85V/2.6V 2.85V/2.85V 2.9V/1.5V 2.9V/1.8V 2.9V/2.9V 3.0V/1.8V 3.0V/2.5V 3.0V/2.6V 3.0V/2.8V 3.0V/2.85V 3.0V/3.0V 3.3V/1.5V 3.3V/1.8V 3.3V/2.5V 3.3V/2.6V 3.3V/2.7V Junction Temp. Range –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® ® 6-Pin 1.6x1.6 Thin MLF 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® 6-Pin 1.6x1.6 Thin MLF® Marking* VOUT1/VOUT2** AGF AGW AGG H4F AJG AJJ AKD AKG ALL AMF AMG AMK AMM AND ANK ANN AOF AOG AOO APG APJ APK APM APN APP ASF ASG ASJ ASK ASL 2 Package M9999-021111-H Micrel, Inc. MIC5320 Part Number Manufacturing Part Number Marking* VOUT1/VOUT2** Junction Temp. Range Package MIC5320-3.0/3.0YML MIC5320-PPYML APP 3.0V/3.0V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-3.3/1.8YML MIC5320-SGYML ASG 3.3V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-3.3/2.5YML MIC5320-SJYML ASJ 3.3V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-3.3/2.7YML MIC5320-SLYML*** ASL 3.3V/2.7V –40°C to +125°C 6-Pin 1.6x1.6 MLF® MIC5320-3.3/2.8YML MIC5320-1.8/1.5YD6 MIC5320-1.8/1.8YD6 MIC5320-1.8/1.6YD6 MIC5320-2.4/1.5YD6 MIC5320-2.5/1.8YD6 MIC5320-2.5/2.5YD6 MIC5320-2.6/1.85YD6 MIC5320-2.6/1.8YD6 MIC5320-2.7/2.7YD6 MIC5320-2.8/1.5YD6 MIC5320-2.8/1.8YD6 MIC5320-2.8/2.6YD6 MIC5320-2.8/2.8YD6 MIC5320-2.85/1.85YD6 MIC5320-2.85/2.6YD6 MIC5320-2.85/2.85YD6 MIC5320-2.9/1.5YD6 MIC5320-2.9/1.8YD6 MIC5320-2.9/2.9YD6 MIC5320-3.0/1.8YD6 MIC5320-3.0/2.5YD6 MIC5320-3.0/2.6YD6 MIC5320-3.0/2.8YD6 MIC5320-3.0/2.85YD6 MIC5320-3.0/3.0YD6 MIC5320-3.3/1.5YD6 MIC5320-3.3/1.8YD6 MIC5320-3.3/2.5YD6 MIC5320-3.3/2.6YD6 MIC5320-3.3/2.7YD6 MIC5320-3.3/2.8YD6 MIC5320-3.3/2.85YD6 MIC5320-3.3/2.9YD6 MIC5320-3.3/3.0YD6 MIC5320-3.3/3.2YD6 MIC5320-3.3/3.3YD6 MIC5320-SMYML MIC5320-GFYD6 MIC5320-GGYD6 MIC5320-GWYD6*** MIC5320-H4FYD6 MIC5320-JGYD6 MIC5320-JJYD6*** MIC5320-KDYD6*** MIC5320-KGYD6 MIC5320-LLYD6 MIC5320-MFYD6 MIC5320-MGYD6 MIC5320-MKYD6 MIC5320-MMYD6 MIC5320-NDYD6*** MIC5320-NKYD6*** MIC5320-NNYD6 MIC5320-OFYD6*** MIC5320-OGYD6*** MIC5320-OOYD6*** MIC5320-PGYD6 MIC5320-PJYD6*** MIC5320-PKYD6 MIC5320-PMYD6*** MIC5320-PNYD6*** MIC5320-PPYD6 MIC5320-SFYD6 MIC5320-SGYD6 MIC5320-SJYD6 MIC5320-SKYD6*** MIC5320-SLYD6*** MIC5320-SMYD6*** MIC5320-SNYD6*** MIC5320-SOYD6*** MIC5320-SPYD6 MIC5320-SRYD6*** MIC5320-SSYD6 ASM QAGF QAGG QAGW QH4F QAJG QAJJ QAKD QAKG QALL QAMF QAMG QAMK QAMM QAND QANK QANN QAOF QAOG QAOO QAPG QAPJ QAPK QAPM QAPN QAPP QASF QASG QASJ QASK QASL QASM QASN QASO QASP QASR QASS 3.3V/2.8V 1.8V/1.5V 1.8V/1.8V 1.8V/1.6V 2.4V/1.5V 2.5V/1.8V 2.5V/2.5V 2.6V/1.85 2.6V/1.8V 2.7V/2.7V 2.8V/1.5V 2.8V/1.8V 2.8V/2.6V 2.8V/2.8V 2.85V/1.85V 2.85V/2.6V 2.85V/2.85V 2.9V/1.5V 2.9V/1.8V 2.9V/2.9V 3.0V/1.8V 3.0V/2.5V 3.0V/2.6V 3.0V/2.8V 3.0V/2.85V 3.0V/3.0V 3.3V/1.5V 3.3V/1.8V 3.3V/2.5V 3.3V/2.6V 3.3V/2.7V 3.3V/2.8V 3.3V/2.85V 3.3V/2.9V 3.3V/3.0V 3.3V/3.2V 3.3V/3.3V –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C 6-Pin 1.6x1.6 MLF® 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 6-Pin TSOT-23 Notes MLF® is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. * Under bar( _ )/Over bar ( ¯ ) symbol may not be to scale. Thin MLF (MT) package Pin 1 identified = ▲. ** For other voltages available. Contact Micrel for more details. *** Contact Micrel Marketing for availability. February 2011 3 M9999-021111-H Micrel, Inc. MIC5320 Pin Configuration VIN 1 6 VOUT1 GND 2 5 VOUT2 EN2 3 4 EN1 VIN GND EN2 3 2 1 4 5 6 VOUT1 VOUT2 EN1 6-Pin 1.6mm x 1.6mm Thin MLF (MT) / MLF (ML) Top View TSOT-23-6 (D6) Top View Pin Description Pin Number Thin MLF-6 / MLF-6 Pin Number TSOT-23-6 Pin Name Pin Function 1 3 VIN Supply Input. 2 2 GND Ground 3 1 EN2 Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off; Do not leave floating. 4 6 EN1 Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off; Do not leave floating. 5 5 VOUT2 Regulator Output – LDO2 6 4 VOUT1 Regulator Output – LDO1 HS Pad – EPAD February 2011 Exposed heatsink pad connected to ground internally. 4 M9999-021111-H Micrel, Inc. MIC5320 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) .....................................0V to +6V Enable Input Voltage (VEN)...........................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 (VEN).............................. 0V to VIN Junction Temperature (TJ) ................. –40°C to +125°C Junction Thermal Resistance Thin MLF-6 / MLF-6 (θJA) ........................ 100°C/W TSOT-6 (θJA) ........................................... 235°C/W Electrical Characteristics(5) VIN = EN1 = EN2 = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF; 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) Ground Current 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 % IOUT = 100µA 0.1 mV IOUT = 50mA 12 50 IOUT = 100mA 25 75 mV mV IOUT = 150mA 35 100 mV EN1 = High; EN2 = Low; IOUT = 100µA to 150mA 85 120 µA EN1 = Low; EN2 = High; IOUT = 100µA to 150mA 85 120 µA EN1 = EN2 = High; IOUT1 = 150mA, IOUT2 = 150mA 150 190 µA Ground Current in Shutdown EN1 = EN2 = 0V 0.01 2 µA Ripple Rejection f = 1kHz; COUT = 1.0µF 65 f=20kHz; COUT = 1.0µF Current Limit VOUT = 0V Output Voltage Noise COUT = 1.0µF; 10Hz to 100KHz dB 45 300 550 dB 950 90 mA µVRMS Enable Inputs (EN1 / EN2) Enable Input Voltage 0.2 Logic Low 1.1 Logic High Enable Input Current V V VIL ≤ 0.2V 0.01 1 µA VIH ≥ 1.0V 0.01 1 µA 30 100 µs Turn-on Time (See Timing Diagram) Turn-on Time (LDO1 and 2) Notes: COUT = 1.0µF 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 its nominal VOUT. For outputs below 2.3V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V. February 2011 5 M9999-021111-H Micrel, Inc. MIC5320 Functional Diagram VIN VOUT 1 LDO1 LDO2 VOUT 2 EN 1 EN 2 Enable Reference GND MIC5320 Block Diagram February 2011 6 M9999-021111-H Micrel, Inc. MIC5320 Typical Characteristics -80 Power Supply Rejection Ratio 40 -70 35 -60 30 -50 150mA -40 25 20 -30 15 -20 10 50mA VIN = VOUT +1V = 2.8V V -10 OUT COUT = 1µF 0 0.1 1 10 100 1,000 FREQUENCY (kHz) 100 Ground Current vs. Temperature 95 80 75 70 0 02 100 55 07 5 100 125 150 OUTPUT CURRENT (mA) Ground Current vs. Temperature 85 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF EN1 = VIN EN2 = GND 20 40 60 80 TEMPERATURE (°C) 50 VIN = VOUT + 1V 45 VOUT = 2.8V 40 COUT = 1µF 35 80 75 70 2.90 3.00 2.95 2.90 2.85 2.80 2.75 2.70 2.65 2.60 2.55 2.50 3.0 2.5 90 100µA Dropout Voltage vs. Temperature Output Voltage vs. Temperature VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF EN1 = VIN 20 40 60 80 TEMPERATURE (°C) Output Voltage vs. Input Voltage 2.8V 2.0 150mA VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF EN1 = VIN EN2 = GND 20 40 60 80 TEMPERATURE (°C) Output Voltage vs. Output Current 1.5 1.5V 1.0 0.5 IOUT = 100µA COUT = 1µF 0.0 0123456 INPUT VOLTAGE (V) 1.60 Output Voltage vs. Output Current 150mA 2.85 1.55 2.80 1.50 VIN = VOUT + 1V 2.75 VOUT = 2.8V COUT1 = COUT2 = 1µF EN1 = VIN EN2 = GND 2.70 02 5 50 75 100 125 150 OUTPUT CURRENT (mA) VIN = VOUT + 1V 1.45 VOUT = 1.5V COUT1 = COUT2 = 1µF EN1 = GND EN2 = VIN 1.40 02 5 50 75 100 125 150 OUTPUT CURRENT (mA) 100mA 30 25 20 15 10 5 0 5 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF EN1 = VIN 95 90 85 Dropout Voltage vs. Output Current 50mA 10mA 100µA 20 40 60 80 TEMPERATURE (°C) February 2011 7 M9999-021111-H Micrel, Inc. MIC5320 Typical Characteristics (Continued) Ground Current vs. Output Current 90 162 Ground Current vs. Output Current 158 85 154 80 150 VIN = VOUT + 1V VOUT = 2.85V EN1 = VIN COUT1 = 1µF 75 70 02 55 07 5 100 125 150 OUTPUT CURRENT (mA) 146 142 02 VIN = VOUT + 1V VOUT = 2.85V EN1 = EN2 = VIN COUT1 = COUT2 = 1µF 55 07 5 100 125 150 OUTPUT CURRENT (mA) 610 600 590 580 570 560 550 540 530 520 510 3 Current Limit vs. Input Voltage EN1 = VIN COUT = 1µF 3.5 4 4.5 5 INPUT VOLTAGE (V) 5.5 Output Noise Spectral Density 10 0.1 0.01 VIN = 4V VOUT = 2.8V COUT = 1µF ILOAD = 50mA 0.001 0.01 0.1 1 10 100 1,000 FREQUENCY (kHz) February 2011 8 M9999-021111-H Micrel, Inc. MIC5320 Functional Characteristics Enable Turn-On EN1 (1V/div) Output Voltag e (20mV/div) Load Transient 150mA VIN = VOUT + 1V VOUT = 2.8V Output Current (50mA/div) COUT = 1µF VIN = VOUT + 1V VOUT1 (1V/div) VOUT = 2.8V COUT = 1µF 10mA Time (10µs/div ) Time (40µs/div ) Line Transient 5.5V Input Voltag e (2V/div) 4V VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF Output Voltag e (50mV/div) IOUT = 10mA Time (40µs/div ) February 2011 9 M9999-021111-H Micrel, Inc. MIC5320 Applications Information Enable/Shutdown The MIC5320 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 the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Thermal Considerations The MIC5320 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. Given that the input voltage is 3.3V, the output voltage is 2.8V for VOUT1, 1.5V for VOUT2 and the output current = 150mA. The actual power dissipation of the regulator circuit can be determined using the equation: Input Capacitor The MIC5320 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 highfrequency noise and are good practice in any RFbased circuit. PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) IOUT2+ VIN IGND Output Capacitor The MIC5320 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. 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 MIC5320 in different packages. Package θJA Recommended Minimum Footprint θJC 6-Pin 1.6x1.6 Thin MLF® 100°C/W 2°C/W Thermal Resistance No-Load Stability Unlike many other voltage regulators, the MIC5320 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. February 2011 ⎛ ⎝ 10 M9999-021111-H Micrel, Inc. 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. For example, when operating the MIC5320-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: MIC5320 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 0.345W = (125°C – TA)/(100°C/W) TA = 90.5°C February 2011 11 M9999-021111-H Micrel, Inc. MIC5320 Package Information 6-Pin 1.6mm x 1.6mm Thin MLF (MT) 6-Pin 1.6mm x 1.6mm MLF (ML) February 2011 12 M9999-021111-H Micrel, Inc. MIC5320 6-Pin TSOT-23 (D6) 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. © 2006 Micrel, Incorporated. February 2011 13 M9999-021111-H