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MIC5203 Micrel MIC5203 CapTM 80mA Low-Dropout Voltage Regulator General Description The MIC5203 is a CapTM 80mA linear voltage regulator with very low dropout voltage (typically 20mV at light loads and 300mV at 80mA) and very low ground current (225A at 20mA output), offering better than 3% initial accuracy with a logic-compatible enable input. The CapTM regulator design is optimized to work with lowvalue, low-cost ceramic capacitors. The outputs typically require only 0.47F of output capacitance for stability. Designed especially for hand-held, battery-powered devices, the MIC5203 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 MIC5203 increases only slightly in dropout, further prolonging battery life. Key MIC5203 features include current limiting, overtemperature shutdown, and protection against reversed battery. The MIC5203 is available in 2.8V, 3.0V, 3.3V, 3.6V, 3.8V, 4.0V, 4.5V, 4.75V, and 5.0V fixed voltages. Other voltages are available; contact Micrel for details. Features * * * * * * * * * * * * Tiny 4-lead and 5-lead surface-mount packages 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 3 Typical Applications Enable Shutdown Ordering Information Part Number MIC5203-3.0BM4 Marking LA30 LA33 LA36 LA38 LA40 LA45 LA47 LA50 LA28 LK30 LK33 LK36 LK38 LK40 LK45 LK47 LK50 Voltage 3.0V 3.3V 3.6V 3.8V 4.0V 4.5V 4.75V 5.0V 2.8V 3.0V 3.3V 3.6V 3.8V 4.0V 4.5V 4.75V 5.0V Junction Temp. Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package SOT-143 SOT-143 SOT-143 SOT-143 SOT-143 SOT-143 SOT-143 SOT-143 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 LAxx VOUT 0.47F MIC5203-3.3BM4 MIC5203-3.6BM4 MIC5203-3.8BM4 MIC5203-4.0BM4 MIC5203-4.5BM4 MIC5203-4.7BM4 MIC5203-5.0BM4 MIC5203-2.8BM5 MIC5203-3.0BM5 SOT-143 Version 1 2 Enable Shutdown 3 5 LKxx VOUT 0.47F MIC5203-3.3BM5 MIC5203-3.6BM5 MIC5203-3.8BM5 MIC5203-4.0BM5 MIC5203-4.5BM5 4 SOT-23-5 Version MIC5203-4.7BM5 MIC5203-5.0BM5 Other voltages available. Contact Micrel for details. December 1998 3-141 MIC5203 Micrel Pin Configuration EN 2 GND 1 Part Identification 3 LAxx 4 IN OUT SOT-143 (M4) EN GND IN 3 2 1 LKxx 4 5 NC OUT SOT-23-5 (M5) Pin Description Pin Number SOT-143 1 2 3 Pin Number SOT-23-5 2 3 1 4 4 5 Pin Name GND EN IN NC OUT Pin Function Ground Enable (Input): TTL/CMOS compatible control input. Logic high = enabled; logic low or open = shutdown. Supply Input Not internally connected. Regulator Output Absolute Maximum Ratings (Note 1) Input Supply Voltage (VIN) ............................ -20V to +20V Enable Input Voltage (VEN) ........................... -20V to +20V Power Dissipation (PD) ............................ Internally Limited Storage Temperature Range (TS) ............ -60C to +150C Lead Temperature (Soldering, 5 sec.) ...................... 260C Operating Ratings (Note 2) Input Voltage (VIN) ........................................... 2.5V to 16V Enable Input Voltage (VEN) .................................. 0V to VIN Junction Temperature Range ................... -40C to +125C Thermal Resistance (JA)......................................... Note 3 3-142 December 1998 MIC5203 Micrel Electrical Characteristics VIN = VOUT + 1V; IL = 1mA; CL = 0.47F; VEN 2.0V; TJ = 25C, bold values indicate -40C TJ +125C; unless noted. Symbol VO VO/T VO/VO VO/VO VIN-VO Parameter Output Voltage Accuracy Output Voltage Temp. Coefficient Line Regulation Load Regulation Dropout Voltage, Note 6 Note 4 VIN = VOUT + 1V to 16V IL = 0.1mA to 80mA, Note 5 IL = 100A IL = 20mA IL = 50mA IL = 80mA IQ IGND Quiescent Current Ground Pin Current, Note 7 VEN 0.4V (shutdown) IL = 100A, VEN 2.0V (active) IL = 20mA, VEN 2.0V (active) IL = 50mA, VEN 2.0V (active) IL = 80mA, VEN 2.0V (active) IGNDDO ILIMIT VO/PD Enable Input VIL VIH IIL IIH Note 1. Note 2. Note 3: Conditions Min -3 -4 Typ Max 3 4 Units % % ppm/C % % % % mV 50 0.008 0.08 20 200 250 300 0.01 180 225 850 1800 200 180 0.05 200 0.3 0.5 0.3 0.5 350 mV mV 600 10 mV A A A A A A mA %/W A A A A 750 3 3000 300 250 Ground Pin Current at Dropout Current Limit Thermal Regulation VIN = VOUT(nominal) - 0.5V, Note 7 VOUT = 0V Note 8 Enable Input Voltage Level logic Low (off) logic high (on) 2.0 0.01 15 VIL 0.6V VIH 2.0V 0.6 Enable Input Current 1 50 Exceeding the absolute maximum rating may damage the device. The device is not guaranteed to function outside its operating rating. The maximum allowable power dissipation at any TA (ambient temperature) is PD(max) = (TJ(max) - TA) / JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The JA is 250C/W for the SOT-143 and 220C/W for the SOT-23-5 mounted on a printed circuit board. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. 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. 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. 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 a 150mA load pulse at VIN = 16V for t = 10ms. Note 4: Note 5: Note 6: Note 7: Note 8: December 1998 3-143 MIC5203 Micrel Typical Characteristics Dropout Voltage vs. Output Current DROPOUT VOLTAGE (mV) CIN = 10F COUT = 1F 100 1000 DROPOUT VOLTAGE (mV) 400 Dropout Voltage vs. Temperature OUTPUT VOLTAGE (V) CIN = 10F COUT = 1F IL = 80mA 4 Dropout Characteristics 300 3 IL = 100A 200 IL = 100A 2 IL = 80mA CIN = 10F COUT = 1F 0 1 2 3 4 5 6 SUPPLY VOLTAGE (V) 7 10 100 IL = 1mA 1 1 0.01 0.1 1 10 100 OUTPUT CURRENT (mA) 0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) 0 2000 GROUND CURRENT (A) Ground Current vs. Output Current GROUND CURRENT (mA) 2.0 Ground Current vs. Supply Voltage GROUND CURRENT (mA) IL = 50mA IL = 100A VOUT = 3.3V 3.0 2.5 2.0 1.5 1.0 0.5 Ground Current vs. Temperature CIN = 10F COUT = 1F IL = 80mA 1500 1.5 1000 1.0 IL = 50mA IL = 100A 500 VIN = VOUT + 1V 0 0 10 20 30 40 50 60 70 80 OUTPUT CURRENT (mA) 0.5 0.0 0 1 2 3 4 5 6 SUPPLY VOLTAGE (V) 7 0.0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) SHORT CIRCUIT CURRENT (mA) OUTPUT VOLTAGE (V) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 50 100 150 200 OUTPUT CURRENT (mA) CIN = 10F COUT = 1F 140 120 100 80 60 40 20 0 0 1 CIN = 10F COUT = 1F LOAD (mA) OUTPUT (mV) 4.0 Output Voltage vs. Output Current 160 Short Circuit Current vs. Input Voltage 60 40 20 0 -20 -40 -60 100 50 0 Thermal Regulation (3.3V Version) CL = 1F -50 -2 0 2 4 6 8 10 12 14 16 TIME (ms) 2 3 4 5 6 INPUT VOLTAGE (V) 7 4.0 OUTPUT VOLTAGE (V) 3.8 3.6 3.4 3.2 3.0 2.8 2.6 Output Voltage vs. Temperature OUTPUT CURRENT (mA) CIN = 10F COUT = 1F 200 180 160 140 120 Short Circuit Current vs. Temperature MIN. SUPPLY VOLTAGE (V) 3.5 Minimum Supply Voltage vs. Temperature IL = 1mA VOUT = 3.3V 3.4 3 DEVICES HI / AVG / LO CURVES APPLICABLE AT 100A AND 50mA CIN = 10F COUT = 1F CIN = 10F COUT = 1F 3.3 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) 2.4 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) 100 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) 3-144 December 1998 MIC5203 Micrel OUTPUT (mA) OUTPUT (mV) OUTPUT (mA) OUTPUT (mV) 0 -200 200 -400 0 -200 100 -400 50 0 -50 -1 0 1 2345 TIME (ms) 6 7 8 COUT = 1F VIN = VOUT + 1 OUTPUT (mA) OUTPUT (mV) 200 Load Transient 200 Load Transient 100 0 -100 100 -200 50 0 -50 -5 Load Transient Awaiting Further Characterization Data COUT = 0.1F VIN = VOUT + 1 COUT = 10F VIN = VOUT + 1 0 -1 0 1 2345 TIME (ms) 6 7 8 0 5 10 TIME (ms) 15 20 OUTPUT (V) OUTPUT (V) OUTPUT (V) 3 2 1 0 -1 3 -2 2 1 Line Transient 3 2 1 0 -1 8 -2 Line Transient CL = 1F IL = 1mA 2 1 0 8 -1 Line Transient CL = 11F IL = 1mA INPUT (V) INPUT (V) 6 4 2 -0.2 0.0 0.2 0.4 0.6 TIME (ms) 0.8 1.0 INPUT (V) Awaiting Further Characterization Data CL = 0.1F IL = 1mA 0.2 0.4 0.6 TIME (ms) 0.8 1.0 3 6 4 2 -0.2 0.0 0.2 0.4 0.6 TIME (ms) 0.8 1.0 0 -1 -2 -0.2 0.0 100 Ripple Voltage vs. Frequency 100 Ripple Voltage vs. Frequency RIPPLE VOLTAGE (dB) 100 80 60 40 Ripple Voltage vs. Frequency 80 60 40 20 0 IL = 100A CL = 0.1F VIN = VOUT + 1 RIPPLE VOLTAGE (dB) RIPPLE VOLTAGE (dB) 80 60 40 20 0 IL = 1mA CL = 0.1F VIN = VOUT + 1 Awaiting Further Characterization Data Awaiting Further Characterization Data Awaiting Further Characterization Data IL = 50mA 20 CL = 0.1F VIN = VOUT + 1 1x103 100x100 100x103 10x100 100x100 10x103 100x100 100x103 FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) Ripple Voltage vs. Frequency 100 100 Ripple Voltage vs. Frequency 100 Ripple Voltage vs. Frequency RIPPLE VOLTAGE (dB) RIPPLE VOLTAGE (dB) 80 60 40 20 0 RIPPLE VOLTAGE (dB) 80 60 40 20 0 80 60 40 20 0 IL = 100A CL = 1F VIN = VOUT + 1 IL = 1mA CL = 1F VIN = VOUT + 1 IL = 50mA CL = 1F VIN = VOUT + 1 10x100 100x100 1x103 10x103 100x103 1x106 10x100 100x100 1x103 10x103 100x103 1x106 10x100 100x100 1x103 10x103 100x103 100x103 10x100 10x103 1x103 10x100 10x103 1x106 FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) December 1998 3-145 1x106 1x106 1x103 1x106 0 MIC5203 Micrel Output Impedance 1000 OUTPUT IMPEDANCE () 100 10 1 0.1 IL = 100A IL = 1mA 5 4 3 2 1 0 4 -1 2 0 Enable Characteristics (3.3V Version) OUTPUT (V) OUTPUT (V) 4.0 3.0 2.0 1.0 0.0 4 -1.0 2 0 -2 -2 Enable Characteristics (3.3V Version) Awaiting Further Characterization Data Awaiting Further Characterization Data ENABLE (V) IL = 100mA CL = 0.1F IL = 100A 0.2 0.4 0.6 TIME (ms) 0.8 1.0 ENABLE (V) CL = 0.1F IL = 100A 0 2 4 6 TIME (s) 8 10 1x100 10x100 100x100 1x103 10x103 100x103 FREQUENCY (Hz) 1x106 0.01 -2 -0.2 0.0 5 4 3 2 1 0 4 -1 2 0 Enable Characteristics (3.3V Version) OUTPUT (V) OUTPUT (V) 4.0 3.0 2.0 1.0 0.0 4 -1.0 Enable Characteristics (3.3V Version) CL = 1F IL = 100A CL = 1F IL = 100A ENABLE (V) ENABLE (V) 0.2 0.4 0.6 TIME (ms) 0.8 1.0 2 0 -2 -2 0 2 4 6 TIME (s) 8 10 -2 -0.2 0.0 1.50 ENABLE VOLTAGE (mV) Enable Voltage vs. Temperature ENABLE CURRENT (A) CIN = 10F COUT = 1F IL = 1mA 40 Enable Current vs. Temperature CIN = 10F COUT = 1F IL = 1mA 1.25 30 1.00 VOFF 0.75 VON 20 VEN = 2V VEN = 5V 10 0.50 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) 0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) 3-146 December 1998 MIC5203 Micrel will also work, but they have electrolytes that freeze at about -30C. Tantalum or ceramic capacitors are recommended for operation below -25C. No-Load Stability The MIC5203 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 MIC5203 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. EN draws a small amount of current, typically 15A. While the logic threshold is TTL/ CMOS compatible, EN may be pulled as high as 20V, independent of VIN. Applications Information Input Capacitor A 0.1F 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 MIC5203 is ultrastable, requiring only 0.47F 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. The capacitor should have a resonant frequency above 500kHz. Ceramic capacitors work, but some dielectrics have poor temperature coefficients, which will affect the value of the output capacitor over temperature. Tantalum capacitors are much more stable over temperature, but typically are larger and more expensive. Aluminum electrolytic capacitors 3 December 1998 3-147 |
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