MIC5213 Micrel MIC5213 Teeny™ SC-70 µCap Low-Dropout Regulator Advance Information General Description Features The MIC5213 is a µCap 80mA linear voltage regulator in the Teeny™ SC-70 package. Featuring half the footprint of the standard SOT-23 package, this Teeny SC-70 regulator has very low dropout voltage (typically 20mV at light loads and 300mV at 80mA) and very low ground current (225µA at 20mA output). It also offers better than 3% initial accuracy and includes a logic-compatible enable input. The µCap regulator design is optimized to work with lowvalue, low-cost ceramic capacitors. The outputs typically require only 0.47µF of output capacitance for stability. Designed especially for hand-held, battery-powered devices, the MIC5213 can be controlled by a CMOS or TTL compatible logic signal. When disabled, power consumption drops nearly to zero. If on-off control is not required, the enable pin may be tied to the input for 3-terminal operation. The ground current of the MIC5213 increases only slightly in dropout, further prolonging battery life. Key MIC5213 features include current limiting, overtemperature shutdown, and protection against reversed battery. The MIC5213 is available in 2.5V, 2.8V, 3.0V, 3.3V, and 3.6V fixed voltages. Other voltages are available; contact Micrel for details. • • • • • • • • • • • • Teeny™ SC-70 package Wide Selection of output voltages Guaranteed 80mA output Low quiescent current Low dropout voltage Tight load and line regulation Low temperature coefficient Current and thermal limiting Reversed input polarity protection Zero off-mode current Logic-controlled shutdown Stability with low-ESR ceramic capacitors Applications • • • • • • Cellular telephones Laptop, notebook, and palmtop computers Battery-powered equipment Bar code scanners SMPS post-regulator/dc-to-dc modules High-efficiency linear power supplies Ordering Information Part Number Marking Voltage Junction Temp. Range Package MIC5213-2.5BC5 LAM 2.5V –40°C to +125°C SC-70-5 MIC5213-2.8BC5 LAJ 2.8V –40°C to +125°C SC-70-5 MIC5213-3.0BC5 LAG 3.0V –40°C to +125°C SC-70-5 MIC5213-3.3BC5 LAE 3.3V –40°C to +125°C SC-70-5 MIC5213-3.6BC5 LAD 3.6V –40°C to +125°C SC-70-5 Other voltages available. Contact Micrel for details. Typical Applications 1 2 3 5 LAx Enable Shutdown 4 VOUT 0.47µF Regulator Circuit Teeny is a trademark of Micrel, Inc. Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com June 2000 1 MIC5213 MIC5213 Micrel Pin Configuration GND NC 3 2 EN 1 LAx 4 5 OUT IN SC-70-5 (C5) Pin Description Pin Number Pin Name Pin Function 1 EN Enable (Input): TTL/CMOS compatible control input. Logic high = enabled; logic low or open = shutdown. 2 NC not internally connected 3 GND Ground 4 OUT Regulator Output 5 IN Supply Input Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Input Supply Voltage (VIN) ............................ –20V to +20V Enable Input Voltage (VEN) ........................... –20V to +20V Power Dissipation (PD) ............................ Internally Limited Storage Temperature Range (TS) ............ –60°C to +150°C Lead Temperature (Soldering, 5 sec.) ...................... 260°C ESD, Note 3 Input Voltage (VIN) ........................................... 2.5V to 16V Enable Input Voltage (VEN) .................................. 0V to VIN Junction Temperature Range ................... –40°C to +125°C Thermal Resistance (θJA)......................................... Note 4 MIC5213 2 June 2000 MIC5213 Micrel Electrical Characteristics VIN = VOUT + 1V; IL = 1mA; CL = 0.47µF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted. Symbol Parameter Conditions VO Output Voltage Accuracy ∆VO/∆T Output Voltage Temp. Coefficient Note 5 ∆VO/VO Line Regulation ∆VO/VO VIN–VO Min Typ Max Units 3 4 % % 50 200 ppm/°C VIN = VOUT + 1V to 16V 0.008 0.3 0.5 % % Load Regulation IL = 0.1mA to 80mA, Note 6 0.08 0.3 0.5 % % Dropout Voltage, Note 7 IL = 100µA 20 IL = 20mA 200 IL = 50mA 250 IL = 80mA 300 600 mV 10 µA –3 –4 mV 350 mV mV IQ Quiescent Current VEN ≤ 0.4V (shutdown) 0.01 IGND Ground Pin Current, Note 8 IL = 100µA, VEN ≥ 2.0V (active) 180 IL = 20mA, VEN ≥ 2.0V (active) 225 IL = 50mA, VEN ≥ 2.0V (active) 850 IL = 80mA, VEN ≥ 2.0V (active) 1800 3000 µA µA µA 750 µA IGNDDO Ground Pin Current at Dropout VIN = VOUT(nominal) – 0.5V, Note 8 200 300 µA ILIMIT Current Limit VOUT = 0V 180 250 mA ∆VO/∆PD Thermal Regulation Note 9 0.05 Enable Input Voltage Level logic Low (off) %/W Enable Input VIL VIH logic high (on) IIL Enable Input Current IIH 0.6 V 2.0 V VIL ≤ 0.6V 0.01 1 µA VIH ≥ 2.0V 15 50 µA Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Note 4: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(max), the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: 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. θJA of the SC-70-5 is 450°C/W, mounted on a PC board. Note 5: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Note 6: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in output voltage due to heating effects are covered by the thermal regulation specification. Note 7: 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. Note 8: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the load current plus the ground pin current. Note 9: Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for an 80mA load pulse at VIN = 16V for t = 10ms. June 2000 3 MIC5213 MIC5213 Micrel Typical Characteristics Dropout Voltage vs. Output Current 10 CIN = 10µF COUT = 1µF 300 IL = 80mA 200 100 0 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 0.1 1 10 100 OUTPUT CURRENT (mA) Ground Current vs. Supply Voltage 0 0.5 0.0 10 20 30 40 50 60 70 80 OUTPUT CURRENT (mA) 0 2.5 OUTPUT VOLTAGE (V) CIN = 10µF COUT = 1µF 2.0 1.5 1.0 0.5 3.8 3.6 0 50 100 150 200 OUTPUT CURRENT (mA) Output Voltage vs. Temperature CIN = 10µF COUT = 1µF 3.4 3.2 3.0 2.8 2.6 3 DEVICES HI / AVG / LO CURVES APPLICABLE AT 100µA AND 50mA 2.4 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) MIC5213 1 CIN = 10µF COUT = 1µF 140 120 100 80 60 CIN = 10µF COUT = 1µF 20 0 200 0 1 2 3 4 5 6 INPUT VOLTAGE (V) 2.5 Ground Current vs. Temperature CIN = 10µF COUT = 1µF IL = 80mA 2.0 1.5 1.0 IL = 50mA 0.5 IL = 100µA 160 CIN = 10µF COUT = 1µF 120 100 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 50 0 CL = 1µF -50 -2 0 7 180 4 7 60 40 20 0 -20 -40 -60 100 Short Circuit Current vs. Temperature 140 1 2 3 4 5 6 SUPPLY VOLTAGE (V) Thermal Regulation (3.3V Version) 160 40 0 0.0 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 7 ∆ OUTPUT (mV) 3.0 OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V) 3.5 1 2 3 4 5 6 SUPPLY VOLTAGE (V) IL = 80mA Short Circuit Current vs. Input Voltage SHORT CIRCUIT CURRENT (mA) Output Voltage vs. Output Current 4.0 GROUND CURRENT (mA) VIN = VOUT + 1V LOAD (mA) 500 1.0 3.5 MIN. SUPPLY VOLTAGE (V) 1000 VOUT = 3.3V IL = 100µA 2 3.0 IL = 50mA 1.5 IL = 100µA 3 0 2.0 1500 4.0 IL = 100µA IL = 1mA Ground Current vs. Output Current 2000 0.0 Dropout Characteristics 4 OUTPUT VOLTAGE (V) 100 1 0.01 GROUND CURRENT (µA) DROPOUT VOLTAGE (mV) CIN = 10µF COUT = 1µF 0 Dropout Voltage vs. Temperature 400 GROUND CURRENT (mA) DROPOUT VOLTAGE (mV) 1000 2 4 6 8 10 12 14 16 TIME (ms) Minimum Supply Voltage vs. Temperature IL = 1mA VOUT = 3.3V 3.4 CIN = 10µF COUT = 1µF 3.3 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) June 2000 MIC5213 Micrel Load Transient OUTPUT (mA) ∆ OUTPUT (mV) 0 COUT = 1µF VIN = VOUT + 1 -200 100 -400 50 0 -50 -1 0 1 2 3 4 5 TIME (ms) 6 7 100 0 100 -200 50 0 -50 -5 8 1 0 -1 6 4 June 2000 0.8 0 6 4 2 -0.2 0.0 1.0 1.0 5 80 60 1x106 100x103 0 10x103 20 IL = 50mA CL = 1µF VIN = VOUT + 1 1x103 40 10x100 RIPPLE VOLTAGE (dB) FREQUENCY (Hz) 1x106 100x103 10x103 1x103 0 IL = 1mA CL = 1µF VIN = VOUT + 1 100x100 20 0.8 100 60 40 0.2 0.4 0.6 TIME (ms) Ripple Voltage vs. Frequency 80 10x100 RIPPLE VOLTAGE (dB) FREQUENCY (Hz) 1x106 100x103 10x103 10x100 0 1x103 20 IL = 100µA CL = 1µF VIN = VOUT + 1 100x100 RIPPLE VOLTAGE (dB) 40 0.2 0.4 0.6 TIME (ms) 100 60 20 CL = 11µF IL = 1mA 1 Ripple Voltage vs. Frequency 80 15 8 -1 2 -0.2 0.0 100 5 10 TIME (ms) 2 INPUT (V) INPUT (V) 8 -2 Ripple Voltage vs. Frequency 0 Line Transient CL = 1µF IL = 1mA ∆ OUTPUT (V) ∆ OUTPUT (V) Line Transient 3 2 COUT = 10µF VIN = VOUT + 1 -100 100x100 OUTPUT (mA) ∆ OUTPUT (mV) Load Transient 200 FREQUENCY (Hz) MIC5213 MIC5213 Micrel 1 CL = 1µF IL = 100µA 2.0 CL = 1µF IL = 100µA 1.0 0.0 4 -1.0 2 0 -2 -0.2 0.0 1x106 100x103 1x103 100x100 1x100 0.01 10x103 IL = 100mA 0.1 Enable Characteristics (3.3V Version) 4.0 3.0 ENABLE (V) OUTPUT (V) IL = 1mA ENABLE (V) 10 IL = 100µA 10x100 OUTPUT IMPEDANCE (Ω) 100 5 4 3 2 1 0 4 -1 OUTPUT (V) Enable Characteristics (3.3V Version) Output Impedance 1000 0.2 0.4 0.6 TIME (ms) 0.8 2 0 -2 -2 1.0 0 2 4 6 TIME (µs) 8 10 FREQUENCY (Hz) CIN = 10µF COUT = 1µF IL = 1mA 1.25 1.00 VOFF VON 0.75 0.50 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) MIC5213 6 40 ENABLE CURRENT (µA) ENABLE VOLTAGE (mV) 1.50 Enable Voltage vs. Temperature Enable Current vs. Temperature CIN = 10µF COUT = 1µF IL = 1mA 30 20 10 VEN = 5V VEN = 2V 0 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) June 2000 MIC5213 Micrel The actual power dissipation of the regulator circuit can be determined using one simple equation. PD = (VIN – VOUT) IOUT + VIN × IGND Substituting PD(max), determined above, for PD and solving for the operating conditions that are critical to the application will give the maximum operating conditions for the regulator circuit. For example, if we are operating the MIC5213-3.0BC5 at room temperature, with a minimum footprint layout, we can determine the maximum input voltage for a set output current. Applications Information Input Capacitor A 0.1µF capacitor should be placed from IN to GND if there is more than 10 inches of wire between the input and the ac filter capacitor or when a battery is used as the input. Output Capacitor Typical PNP based regulators require an output capacitor to prevent oscillation. The MIC5213 is ultrastable, requiring only 0.47µF of output capacitance for stability. The regulator is stable with all types of capacitors, including the tiny, low-ESR ceramic chip capacitors. The output capacitor value can be increased without limit to improve transient response. No-Load Stability The MIC5213 will remain stable and in regulation with no load (other than the internal voltage divider) unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Enable Input The MIC5213 features nearly zero off-mode current. When EN (enable input) is held below 0.6V, all internal circuitry is powered off. Pulling EN high (over 2.0V) re-enables the device and allows operation. When EN is held low, the regulator typically draws only 10nA of current. While the logic threshold is TTL/CMOS compatible, EN may be pulled as high as 20V, independent of VIN. Thermal Behavior The MIC5213 is designed to provide 80mA of continuous current in a very small profile packages. Maximum power dissipation can be calculated based on the output current and the voltage drop across the part. To determine the maximum power dissipation of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation: PD(max) = PD(max) = 125 − 25 450°C / W PD(max) = 222mW To prevent the device from entering thermal shutdown, maximum power dissipation cannot be exceeded. Using the output voltage of 3.0V, and an output current of 80mA, we can determine the maximum input voltage. Ground current, maximum of 3mA for 80mA of output current, can be taken from the “Electrical Characteristics” section of the data sheet. 222mW = (VIN – 3.0V) 80mA + VIN × 3mA 222mW = (80mA × VIN + 3mA × VIN) – 240mW 462mW = 83mA × VIN VIN = 5.57V max. Therefore, a 3.0V application at 80mA of output current can accept a maximum input voltage of 5.6V in an SC-70-5 package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to Regulator Thermals section of Micrel’s Designing with Low-Dropout Voltage Regulators handbook. Fixed Voltage Regulator The MIC5213 is ideal for general-purpose voltage regulation in any handheld device. Applications that are tight for space can easily use the Teeny™ SC-70 regulator which occupies half the space of a SOT-23-5 regulator. The MIC5203 offers a smaller system solution, only requiring a small multilayer ceramic capacitor for stability. TJ(max) − TA θ JA TJ(max) is the maximum junction temperature of the die, 125°C, and TA is the maximum ambient temperature. θJA is the junction-to-ambient thermal resistance ambient of the regulator. The θJA of the MIC5213 is 450°C/W. MIC5213-x.x IN 3.6V Li-Ion Cell EN OUT GND VOUT 3.0V 0.47µF Figure 1. Single-Cell Regulator June 2000 7 MIC5213 MIC5213 Micrel Package Information 0.65 (0.0256) BSC 1.35 (0.053) 2.40 (0.094) 1.15 (0.045) 1.80 (0.071) 2.20 (0.087) 1.80 (0.071) DIMENSIONS: MM (INCH) 1.00 (0.039) 1.10 (0.043) 0.80 (0.032) 0.80 (0.032) 0.10 (0.004) 0.00 (0.000) 0.30 (0.012) 0.15 (0.006) 0.18 (0.007) 0.10 (0.004) 0.30 (0.012) 0.10 (0.004) SC-70-5 (C5) MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB USA http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2000 Micrel Incorporated MIC5213 8 June 2000