MIC69101/103 Single Supply VIN, LOW VIN, LOW VOUT, 1A LDO General Description Features The MIC69101/103 is the 1A output current member of the ∑ Single input voltage range: VIN: 1.65V to 5.5V MIC69xxx family of high current, low voltage regulators, ∑ Maximum dropout (VIN – VOUT) of 500mV which support currents of 1A, 1.5A, 3A, and 5A. The over temperature MIC69101/103 operates from a single low voltage supply, ∑ Adjustable output voltage down to 0.5V yet offers high precision and ultra-low dropout of 500mV ∑ Stable with 4.7µF ceramic output capacitor under worst case conditions. ∑ Excellent line and load regulation specifications The MIC69101/103 operates from an input voltage of ∑ Logic controlled shutdown 1.65V to 5.5V. It is designed to drive digital circuits ∑ Thermal shutdown and current limit protection requiring low voltage at high currents (i.e. PLDs, DSP, ® ∑ 10-Pin 3mm x 3mm MLF package microcontroller, etc.). These regulators are available in adjustable and fixed output voltages including 1.8V. The ∑ Available –40°C to +125°C junction temperature adjustable version can support output voltages down to 0.5V. Applications The µCap design of the MIC69101/103 is optimized for ∑ Point-of-load applications stability with low value low-ESR ceramic output capacitors. ∑ Industrial power Features of the MIC69101/103 include thermal shutdown and current limit protection. Logic enable and error flag ∑ Sensitive RF applications pins are also available. The MIC69101/103 is offered in a tiny 10-pin 3mm x 3mm ® MLF package and has an operating temperature range of –40°C to +125°C. Datasheets 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 December 2008 M9999-121908-B Micrel, Inc. MIC69101/103 Ordering Information Part Number Nominal Output Voltage Junction Temperature Range Package MIC69101-1.8YML 1.8V –40° to +125°C 10-Pin 3x3 MLF MIC69103YML Adj. –40° to +125°C Lead Finish ® Pb-Free ® Pb-Free 10-Pin 3x3 MLF 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) Pin Description Pin Number Pin Name 1 FLG Error Flag (Output): Open collector output. Active low indicates an output fault condition. 2, 4, 5, 8 NC Not internally connected. 3 (EP) GND 6 EN Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown. Do not leave pin floating. 7 VIN Input voltage which supplies current to the output power device. 9 VOUT 10 (Adj) ADJ Adjustable regulator feedback input. Connect to resistor voltage divider. 10 (Fixed) SNS Sense pin, connect to output for improved voltage regulation. December 2008 Pin Function ® Ground (exposed pad is recommended to connect to ground on MLF ). Regulator Output. 2 M9999-121908-B Micrel, Inc. MIC69101/103 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 (T S)........................... –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 ® MLF (qJA)............................................................. 60°C/W Electrical Characteristics(4) TA = 25°C with VIN = VOUT + 0.5V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT 4.7µF ceramic, unless otherwise noted. Parameter Output Voltage Accuracy (Fixed) Output Voltage Accuracy (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 1A IL = 0.5A IL = 1.0A IL = 10mA IL = 0.5A IL = 1.0A VEN = 0V VOUT = 0V VEN = VIN Regulator enable Regulator shutdown VIL ≤ 0.2V (Regulator shutdown) VIH ≥ 0.8V (Regulator enable) 1.2 0.8 Typ 0.5 0.21 ±0.1 ±0.25 150 215 1.1 4.7 11 1 1.95 10 165 Max +2 0.51 1 ±0.3 300 500 20 150 0.6 0.2 0.005 7 Units % V µA %/V % mV mV mA mA mA µA A µs °C V V µA µA 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) / qJA. 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. December 2008 3 M9999-121908-B Micrel, Inc. MIC69101/103 Typical Characteristics 70 Power Supply Rejection Ratio 60 50 40 30 20 VIN = 3.3V 10 VOUT = 1.8V IOUT = 0.5A 0 1K 10K FREQUENCY (Hz) 2.00 Output Voltage vs. Temperature 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 20 18 16 14 12 VIN = VOUT + 1V VOUT = 1.8V COUT = 10µF IOUT = 10mA 20 40 60 80 TEMPERATURE (°C) Ground Current vs. Temperature 1A VIN = VOUT + 1V VOUT = 1.8V COUT = 10µF 10 8 6 4 2 0 4.0 400 20 40 60 80 TEMPERATURE (°C) 400 350 350 300 300 250 250 200 200 150 150 100 100 VOUT = 1.8V COUT = 10µF 50 0 100 2.0 300 500 700 900 OUTPUT CURRENT (mA) Outpout Voltage vs. Input Voltage 50 0 10 1.8 9 1.6 1.4 1.2 8 7 6 0.5A 1A 1.0 0.8 5 4 0.6 0.4 3 2 0.2 0 0 1.0 0.9 VOUT = 1.8V COUT = 10µF 0.4 0.8 1.2 1.6 2.0 2.4 2.8 INPUT VOLTAGE (V) Enable Threshold vs. Temperature 1 0 Dropout Voltage vs. Temperature IOUT=1A IOUT=0.5A VOUT = 1.8V COUT = 10µF 20 40 60 80 TEMPERATURE (°C) Ground Current vs. Output Current VIN = 2.8V VOUT = 1.8V COUT = 10µF 0.5 0.7 OUTPUT CURRENT (A) Load Regulation 1.900 1.875 0.8 0.7 0.6 0.5 0.4 0.5A Dropout Voltage vs. Output Current 1.850 ON 1.825 1.800 OFF 1.775 0.3 VIN = 2.8V 0.2 VOUT = 1.8V = 10µF C 0.1 OUT IOUT = 100mA 0 20 40 60 80 TEMPERATURE (°C) 1.750 1.725 1.700 VIN = 2.8V VOUT = 1.8V COUT = 10µF 0.4 0.6 OUTPUT CURRENT (A) Current Limit vs. Temperature 3.5 3.0 2.5 2.0 1.5 1.0 VIN = 2.8V VOUT = 1.8V COUT = 10µF 0.5 0 20 40 60 80 TEMPERATURE (°C) December 2008 4 M9999-121908-B Micrel, Inc. MIC69101/103 Functional Characteristics December 2008 5 M9999-121908-B Micrel, Inc. MIC69101/103 Functional Diagram IN EN OUT ENABLE VREF ADJ 50mV FLG VREF GND December 2008 6 M9999-121908-B Micrel, Inc. MIC69101/103 Minimum Load Current The MIC69101/103 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 MIC69101/103 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 MIC69101/103 requires a minimum number of external components. The MIC69101/103 regulator is fully protected from damage due to fault conditions offering constant current limiting and thermal shutdown. Adjustable Regulator Design The MIC69101/103 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 a high current to the collector of the pass transistor. The minimum input voltage is 1.65V allowing conversion from low voltage supplies. ÊR ˆ VOUT = 0.5 * ÁÁ 1 + 1˜˜ Ë R2 ¯ Where VOUT is the desired output voltage. Output Capacitor The MIC69101/103 requires a minimum of output capacitance to maintain stability. However, proper capacitor selection is important to ensure desired transient response. The MIC69101/103 is specifically designed to be stable with low ESR ceramic chip capacitors. A 4.7µF 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 MIC69101/103 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) / qJA. 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. December 2008 7 M9999-121908-B Micrel, Inc. MIC69101/103 Package Information ® 10-Pin 3mm x 3mm MLF (ML) 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. December 2008 8 M9999-121908-B