MIC69151/153 Single Supply VIN, Low VIN, Low VOUT, 1.5A LDO General Description Features The MIC69151/153 is the 1.5A output current member of • Single input voltage range: VIN: 1.65V to 5.5V the MIC69xxx family of high current, low voltage • Maximum dropout (VIN – VOUT) of 500mV regulators, which support currents of 1A, 1.5A, 3A, and 5A. over temperature The MIC69151/153 operates from a single low voltage • Adjustable output voltage down to 0.5V supply, yet offers high precision and ultra-low dropout of • Stable with 10µF ceramic output capacitor 500mV under worst case conditions. • Excellent line and load regulation specifications The MIC69151/153 operates from an input voltage of • Logic controlled shutdown 1.65V to 5.5V. It is designed to drive digital circuits requiring low voltage at high currents (i.e. PLDs, DSP, • Thermal shutdown and current limit protection ® microcontroller, etc.). These regulators are available in • 10-Pin 3mm x 3mm MLF package adjustable and fixed output voltages including 1.8V. The • EPAD SOIC-8 package adjustable version can support output voltages down to • Available –40°C to +125°C junction temperature 0.5V. The µCap design of the MIC69151/153 is optimized for stability with low value low-ESR ceramic output capacitors. Applications Features of the MIC69151/153 include thermal shutdown • Point-of-load applications and current limit protection. Logic enable and error flag • Industrial power pins are also available. • Sensitive RF applications The MIC69151/153 is offered in a tiny 10-pin 3mm x 3mm ® MLF package and an EPAD SOIC-8 package. Both packages have an operating temperature range of –40°C to +125°C. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. ___________________________________________________________________________________________________________ Typical Application Fixed 1.8V Regulator w/Flag Error Adjustable Regulator Super ßeta PNP is a registered trademark of Micrel, 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 July 2010 M9999-071210-D Micrel, Inc. MIC69151/153 Ordering Information Part Number Nominal Output Voltage Junction Temperature Range Package Lead Finish MIC69151-1.8YML 1.8V –40° to +125°C 10-Pin 3x3 MLF MIC69151-1.8YME 1.8V –40° to +125°C 8-Pin EPAD SOIC MIC69153YME Adj. –40° to +125°C 8-Pin EPAD SOIC MIC69153YML Adj. –40° to +125°C 10-Pin 3x3 MLF ® ® Pb-Free Pb Free Pb Free Pb-Free Pin Configuration FLG 1 10 ADJ/SNS NC 2 9 VOUT GND 3 8 NC NC 4 7 VIN NC 5 6 EN ® 10-Pin 3mm x 3mm MLF (ML) GND 1 8 FLG EN 2 7 SNS/ADJ VIN 3 6 VOUT VIN 4 5 VOUT 8-Pin EPAD SOIC (ME) Pin Description Pin Number MLF-10 Pin Number EPAD SOIC-8 Pin Name Pin Function 1 8 FLG Error Flag (Output): Open collector output. Active low indicates an output fault condition. 2, 4, 5, 8 – NC Not internally connected. 3 (EP) 1 GND 6 2 EN Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown. Do not leave pin floating. 7 3, 4 VIN Input voltage which supplies current to the output power device. ® Ground (exposed pad is recommended to connect to ground on MLF ). 9 5, 6 VOUT 10 (Adj) 7 (Adj) ADJ Adjustable regulator feedback input. Connect to resistor voltage divider. 10 (Fixed) 7 (Fixed) SNS Sense pin, connect to output for improved voltage regulation. July 2010 Regulator Output. 2 M9999-071210-D Micrel, Inc. MIC69151/153 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Input Voltage (VIN) ................................................6V Logic Input Voltage (VEN, VLQ)................................ 0V to VIN (3) Power Dissipation (PD) ........................... Internally Limited Flag ..................................................................................6V Storage Temperature (TS)......................... –65°C to +125°C (4) ESD ............................................................................. 2kV Supply Voltage (VIN) ....................................... 1.65V to 5.5V Enable Input Voltage (VEN)..................................... 0V to VIN Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C Package Thermal Resistance ® 3x3 MLF (θJA) ...................................................60°C/W EPAD SOIC-8 (θJA) ............................................41°C/W Electrical Characteristics(4) TA = 25°C with VIN = VOUT + 1V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT 4.7µF ceramic, unless otherwise noted. Parameter Output Voltage Accuracy (Fixed) Adjustable Feedback Voltage (Adj) Feedback Pin Current Output Voltage Line Regulation (Note 5) Output Voltage Load Regulation VIN – VO; Dropout Voltage (Note 6) Ground Pin Current Ground Pin Current in Shutdown Current Limit Start-up Time Thermal Shutdown Enable Input Enable Input Threshold Enable Pin Input Current Conditions Over temperature range Min –2 0.49 VIN = VOUT +1.0V to 5.5V For VOUT ≥ 0.65V, VIN = 1.65 to 5.5V IL = 10mA to 1.5A IL = 1.0A IL = 1.5A IL = 10mA IL = 0.5A IL = 1.5A VEN = 0V VOUT = 0V VEN = VIN Regulator enable Regulator shutdown VIL ≤ 0.2V (Regulator shutdown) VIH ≥ 0.8V (Regulator enable) 1.7 0.8 Typ 0.5 Max +2 0.51 Units % V 0.25 ±0.2 1 ±0.3 µA %/V ±0.2 185 250 1.6 7.5 20 1 2.6 10 165 300 500 20 35 150 0.6 % mV mV mA mA mA µA A µs °C 0.005 7 V V µA µA 0.2 Flag Output IFLG(LEAK) Flag Output Leakage Current (Flag Off) 0.05 µA VFLG(LO) Output Logic-Low Voltage (undervoltage condition), IL = 5mA Threshold, % of VOUT below nominal (falling) Hysteresis 150 mV VFLG 7.5 10 2 14 % % 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. Specification for packaged product only. 5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage. 6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. For outputs below 1.65V, dropout voltage is considered the input-to-output voltage differential with the minimum input voltage of 1.65V. Minimum input operating voltage is 1.65V. July 2010 3 M9999-071210-D Micrel, Inc. MIC69151/153 Typical Characteristics Power Supply Rejection Ratio 70 60 300 300 200 40 200 150 100 20 VIN = 3.3V 10 VOUT = 1.8V IOUT = 0.5A 0 1K 10K FREQUENCY (Hz) Ground Current vs. Output Current 18 50 VOUT = 1.8V COUT = 10µF 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 OUTPUT CURRENT (A) 16 14 14 12 Ground Current vs. Temperature 1A 10 10 8 8 6 6 4 VIN = 3V VOUT = 1.8V COUT = 10µF 800 1200 OUTPUT CURRENT (mA) 2 0 Output Voltage vs. Temperature 1.90 1.88 1.86 0.5A 4 V =V IN OUT +1 2 VOUT = 1.8V COUT = 10µF 0 20 40 60 80 TEMPERATURE (°C) 2.8 2.7 2.6 1.84 1.82 1.80 1.78 2.5 2.4 2.3 2.2 1.76 1.74 1.72 2.1 2.0 1.9 VIN = 3.3V VOUT = 1.8V IOUT = 10mA 1.70 20 40 60 80 TEMPERATURE (°C) IOUT=750mA 100 16 12 IOUT=1.5A 250 150 30 1.8 Current Limit vs. Temperature VIN = 3.3V VOUT = 1.8V 50 0 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 20 40 60 80 TEMPERATURE (°C) Output Voltage vs. Input Voltage 750mA 1A VOUT = 1.8V COUT = 10µF 0.5 1.0 1.5 2.0 2.5 INPUT VOLTAGE (V) 3.0 Load Regulation 1.802 1.800 1.798 1.796 1.794 1.792 1.790 VIN = 3.3V VOUT = 1.8V 20 40 60 80 TEMPERATURE (°C) VIN = 3V 1.788 VOUT = 1.8V COUT = 10µF 1.786 0 0.25 0.5 0.75 1.0 1.25 1.5 OUTPUT CURRENT (A) Enable Threshold vs. Temperature 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0 400 Dropout Voltage vs. Temperature 350 250 50 0.3 0.2 0.1 Dropout Voltage vs. Output Current ON VIN = 2.8V VOUT = 1.8V COUT = 10µF IOUT = 100mA July 2010 OFF 20 40 60 80 TEMPERATURE (°C) 4 M9999-071210-D Micrel, Inc. MIC69151/153 Functional Characteristics July 2010 5 M9999-071210-D Micrel, Inc. MIC69151/153 Functional Diagram IN EN OUT ENABLE VREF ADJ 50mV FLG VREF GND July 2010 6 M9999-071210-D Micrel, Inc. MIC69151/153 Minimum Load Current The MIC69151/153 regulator is specified between finite loads. If the output current is too small, leakage currents dominate and the output voltage rises. A 10mA minimum load current is necessary for proper operation. Application Information The MIC69151/153 is an ultra-high performance low dropout linear regulator designed for high current applications requiring a fast transient response. It utilizes a single input supply, perfect for low-voltage DC-to-DC conversion. The MIC69151/153 requires a minimum number of external components. The MIC69151/153 regulator is fully protected from damage due to fault conditions offering constant current limiting and thermal shutdown. Adjustable Regulator Design The MIC69153 adjustable version allows programming the output voltage anywhere between 0.5V and 5.5V with two resistors. The resistor value between VOUT and the adjust pin should not exceed 10kΩ. Larger values can cause instability. The resistor values are calculated by: Input Supply Voltage VIN provides high current to the collector of the pass transistor. The minimum input voltage is 1.65V allowing conversion from low voltage supplies. ⎛R ⎞ VOUT = 0.5 ∗ ⎜⎜ 1 + 1⎟⎟ ⎝ R2 ⎠ Where VOUT is the desired output voltage. Output Capacitor The MIC69151/153 requires a minimum of output capacitance to maintain stability. However, proper capacitor selection is important to ensure desired transient response. The MIC69151/153 is specifically designed to be stable with low ESR ceramic chip capacitors. A 10µF ceramic chip capacitor should satisfy most applications. Output capacitor can be increased without bound. See typical characteristics for examples of load transient response. X7R dielectric ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by only 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 or a tantalum capacitor to ensure the same capacitance value over the operating temperature range. Tantalum capacitors have a very stable dielectric (10% over their operating temperature range) and can also be used with this device. Enable The fixed output voltage versions of the MIC69151 feature an active high enable input (EN) that allows onoff control of the regulator. Current drain reduces to near “zero” when the device is shutdown, with only microamperes of leakage current. EN may be directly tied to VIN and pulled up to the maximum supply voltage. Thermal Design Linear regulators are simple to use. The most complicated design parameters to consider are thermal characteristics. Thermal design requires the following application-specific parameters: • Maximum ambient temperature (TA) • Output current (IOUT) • Output voltage (VOUT) • Input voltage (VIN) • Ground current (IGND) First, calculate the power dissipation of the regulator from these numbers and the device parameters from this data sheet. PD = (VIN – VOUT) IOUT + VIN IGND where the ground current is approximated by using numbers from the “Electrical Characteristics” or “Typical Characteristics” sections. 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. Refer to “Application Note 9” for further details and examples on thermal design and heat sink applications. Input Capacitor An input capacitor of 1µF or greater is recommended when the device is more than 4 inches away from the bulk supply capacitance or when the supply is a battery. Small, surface mount, ceramic chip capacitors can be used for the bypassing. The capacitor should be placed within 1 inch of the device for optimal performance. Larger values will help to improve ripple rejection by bypassing the input to the regulator further improving the integrity of the output voltage. July 2010 7 M9999-071210-D Micrel, Inc. MIC69151/153 Package Information ® 10-Pin 3mm x 3mm MLF (ML) 8-Pin EPAD SOIC (ME) July 2010 8 M9999-071210-D Micrel, Inc. MIC69151/153 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. © 2008 Micrel, Incorporated. July 2010 9 M9999-071210-D