MIC5201 Micrel, Inc. MIC5201 200mA Low-Dropout Regulator General Description Features The MIC5201 is an efficient linear voltage regulator with very low dropout voltage (typically 17mV at light loads and 200mV at 100mA), and very low ground current (1mA at 100mA output), offering better than 1% initial accuracy with a logic compatible on-off switching input. Designed especially for hand-held battery powered devices, the MIC5201 can be switched by a CMOS or TTL compatible enable signal. This enable control may be connected directly to VIN if unneeded. When disabled, power consumption drops nearly to zero. The ground current of the MIC5201 increases only slightly in dropout, further prolonging battery life. Key MIC5201 features include current limiting, overtemperature shutdown, and protection against reversed battery. The MIC5201 is available in several fixed voltages and accuracy configurations. It features the same pinout as the LT1121 with better performance. Other options are available; contact Micrel for details. • • • • • • • • • • • • • Applications • • • • • • • Ordering Information Standard Part Number PbFree High output voltage accuracy Variety of output voltages Guaranteed 200mA output Low quiescent current Low dropout voltage Extremely tight load and line regulation Very low temperature coefficient Current and thermal limiting Reversed-battery protection Load-dump protection (fixed voltage versions) Zero off-mode current Logic-controlled electronic enable Available in SO-8 and SOT-223 packages Cellular telephones Laptop, notebook, and palmtop computers Battery powered equipment PCMCIA VCC and VPP regulation/switching Bar code scanners SMPS post-regulator/ dc-to-dc modules High-efficiency linear power supplies Voltage Junction Temp.* Package MIC5201BM MIC5201YM Adj. –40ºC to +125ºC SO-8 MIC5201-3.0BM MIC5201-3.0YM 3.0V –40ºC to +125ºC SO-8 MIC5201-3.3BM MIC5201-3.3YM 3.3V –40ºC to +125ºC SO-8 MIC5201-5.0BM MIC5201-5.0YM 5.0V –40ºC to +125ºC SO-8 MIC5201-3.0BS MIC5201-3.0YS 3.0V –40ºC to +125ºC SOT-223 MIC5201-3.3BS MIC5201-3.3YS 3.3V –40ºC to +125ºC SOT-223 MIC5201-4.8BS MIC5201-4.8YS 4.8V –40ºC to +125ºC SOT-223 MIC5201-5.0BS MIC5201-5.0YS 5.0V –40ºC to +125ºC SOT-223 Other voltages available. Contact Micrel for details. * Junction Temperature. Typical Application ENABLE SHUTDOWN MIC5201-3.3 IN VOUT 3.3V OUT EN GND 1µF MM8 is a 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 June 2005 1 MIC5201 MIC5201 Micrel, Inc. Pin Configuration GND TAB 1 IN 2 3 GND OUT MIC5201-x.xBS SOT-223 Fixed OUT 1 8 IN NC 2 7 NC NC GND 3 6 NC EN NC 4 5 EN OUT 1 8 IN ADJ 2 7 NC GND 3 6 NC 4 5 MIC5201-x.xBM 8-Lead SOIC Fixed MIC5201BM 8-Lead SOIC Adjustable Pin Description Pin No. SOT-223 3 Pin No. Pin No. SO-8 Adj. SO-8 Fixed 1 Pin Name 1 2 2 1 Pin Function OUT Regulated Output ADJ Feedback Input: (Adjustable version only) not internally connected: Connect to ground plane for lowest thermal resistance. 4, 6, 7 2, 4, 6, 7 NC 3 3 GND 5 5 EN Enable (Input): TTL compatible input. High = enable. Low or open = off/disable. 8 8 VIN Unregulated Supply Input Ground Absolute Maximum Ratings Operating Ratings Supply Input Voltage (VIN) Fixed .................. –20V to +60V Supply Input Voltage (VIN) Adjustable .......... –20V to +20V Enable Input Voltage (VEN) Fixed ................. –20V to +60V Enable Input Voltage (VEN) Adjustable ......... –20V to +20V Power Dissipation (PD) ............................ Internally Limited Junction Temperature (TJ) ....................... –40°C to +125°C Lead Temperature (soldering, 5 sec.) ....................... 260°C Supply Input Voltage (VIN) Fixed ................... 2.5V to +26V Supply Input Voltage (VIN) Adjustable ........... 2.5V to +16V Enable Input Voltage (VEN) .................................. 0V to VIN Junction Temperature (TJ) ....................... –40°C to +125°C MIC5201 2 June 2005 MIC5201 Micrel, Inc. Electrical Characteristics VIN = VOUT + 1V; IL = 100µA; CL = 3.3µF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted Symbol Parameter Condition Min VO Output Voltage Accuracy Variation from specified VOUT ∆VO/∆T Output Voltage Temperature Coef. Note 2 ∆VO/VO Line Regulation, Fixed ∆VO/VO Typ Max Units 1 2 % % 40 150 ppm/°C VIN = VOUT + 1V to 26V 0.004 0.20 0.40 % % Line Regulation, Adjustable VIN = VOUT + 1V to 16V 0.004 0.20 0.40 % % ∆VO/VO Load Regulation IL = 0.1mA to 200mA, Note 3 0.04 0.16 0.30 % % VIN – VO Dropout Voltage, Note 4 IL = 100µA IL = 20mA IL = 50mA IL = 100mA IL = 200mA 17 130 180 225 270 400 mV mV mV mV mV –1 –2 IGND Quiescent Current VENABLE ≤ 0.7V (shutdown) 0.01 IGND Ground Pin Current IL = 100µA IL = 20mA IL = 50mA IL = 100mA IL = 200mA 130 270 500 1000 3000 µA 400 2000 75 µA µA µA µA µA PSRR Ripple Rejection dB IGNDDO Ground Pin Current at Dropout VIN = 0.5V less than specified VOUT, IL = 100µA, Note 5 270 330 µA ILIMIT Current Limit VOUT = 0V 280 500 mA ∆VO/∆PD Thermal Regulation Note 6 0.05 %/W en Output Noise 100 µV Enable Input VIL Input Voltage Level logic low (off) 0.7 V VIH Input Voltage Level logic high (on) IIL Enable Input Current VIL ≤ 0.7V 0.01 1 µA IIH Enable Input Current VIH ≤ 2.0V 15 50 µA 1.242 1.255 1.267 V V 2.0 V Reference (MIC5201 Adjustable Version Only) VREF Reference Voltage IIL Reference Voltage Temp. Coef. 1.223 1.217 20 ppm/°C General Note: Devices are ESD sensitive. Handling precautions recommended. Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its rated operating conditions. 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: P(max) = (TJ(max) – AT) ÷ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The θJC of the MIC5201-x.xBS is 15°C/W and θJA for the MIC5201BM is 160°C/W mounted on a PC board (see “Thermal Considerations” section for further details). Note 2: Output voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range. Note 3: 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 200mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. Note 4: 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 5: 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 6: 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 200mA load pulse at VIN = 26V for fixed and VIN = 16V for adjustable at t = 10ms. June 2005 3 MIC5201 MIC5201 Micrel, Inc. Block Diagrams VIN OUT IN VOUT COUT Bandgap Ref. Current Limit Thermal Shutdown MIC5201-x.xBS GND Fixed Regulator (SOT-223 version only) VIN OUT IN VOUT COUT Bandgap Ref. V REF EN Current Limit Thermal Shutdown MIC5201-x.xBM GND Fixed Regulator VIN OUT IN VOUT COUT ADJ R1 R2 Bandgap Ref. V REF EN Current Limit Thermal Shutdown MIC5201BM [adj.] GND Adjustable Regulator MIC5201 4 June 2005 MIC5201 Micrel, Inc. Typical Characteristics 200 0.3 150 OUTPUT VOLTAGE (V) 3.0 DROPOUT VOLTAGE (V) 2.0 0.2 100 1.5 1.0 0.1 50 0 0.01 IL = 1mA Ground Current vs. Output Current 10 OUTPUT VOLTAGE (V) GROUND CURRENT (mA) 2.0 1.5 0.6 1.0 0.4 IL = 1mA 0.2 1.3 ∆ OUTPUT (mV) 1.4 ILOAD = 100mA CIN = 2.2µF COUT = 4.7µF 1.1 1.0 -50 0.15 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) OUTPUT VOLTAGE (V) 3.5 CIN = 2.2µF COUT = 4.7µF 3.4 3.3 3.2 3 DEV IC ES : HI / AVG / LO 3.1 CURVES APPLICABLE AT 100µA AND 100mA 3.0 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) June 2005 300 280 260 240 220 200 180 50 0 100 VOUT = 0V 160 (SHORT CIRCUIT) 140 120 100 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 0 0 5 10 15 20 25 30 35 TIME (ms) Minimum Input Voltage vs. Temperature 3.30 3.29 3.27 3.26 3.25 VOUT = 3.3V CL = 4.7 µF -50 200 3.28 5 0.3 100 -100 -5 150 Output Current vs. Temperature Output Voltage vs. Temp. (3.3V Version) OUTPUT CURRENT (mA) 3.6 0 50 100 TEMPERATURE (°C) 0.1 0.2 OUTPUT CURRENT (A) Thermal Regulation (3.3V Version) 1.2 0.20 0.0 0.0 10 LOAD (mA) GROUND CURRENT (mA) GROUND CURRENT (mA) 0.25 2 4 6 8 SUPPLY VOLTAGE (V) 1.5 0.30 ILOAD = 100µA CIN = 2.2µF COUT = 4.7µF 0 0.5 Ground Current vs. Temperature Ground Current vs. Temperature CIN = 2.2µF COUT = 4.7µF 2.5 IL = 100mA 0.8 0.0 10 3.0 1.0 0.1 1 10 100 OUTPUT CURRENT (mA) 2 4 6 8 INPUT VOLTAGE (V) 3.5 1.2 1 0 Output Voltage vs. Output Current 1.4 0.1 0.01 0.0 Ground Current vs. Supply Voltage 1.6 IL = 100µA, 1mA 0.5 0.0 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 0.1 1 10 100 1000 OUTPUT CURRENT (mA) IL = 100mA 2.5 IL = 100mA MIN. INPUT VOLTAGE (V) DROPOUT VOLTAGE (mV) 3.5 0.4 250 GROUND CURRENT (mA) Dropout Characteristics Dropout Voltage vs. Temperature Dropout Voltage vs. Output Current CIN = 2.2µF COUT = 4.7µF ILOAD = 1mA 3.24 3.23 3.22 3.21 3.20 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) MIC5201 MIC5201 Micrel, Inc. CIN = 2.2µF COUT = 4.7µF VOUT = 3.3V 50 1 2 3 4 5 6 INPUT VOLTAGE (V) 200 100 0 -2 7 Supply Current vs. Supply Voltage (3.3V Version) 80 RL = 33Ω 20 0 ENABLE (V) RL = 66Ω 10 0 1 2 3 4 5 6 SUPPLY VOLTAGE (V) 5 4 3 2 1 0 -1 4 0 ENABLE CURRENT (µA) 30 25 CIN = 2.2µF COUT = 4.7µF 20 IL = 1mA 1 15 VE N = 5V 10 0.1 0.01 1x106 100x103 10x103 1x103 100x100 10x100 IL = 100mA 5 0 40 VE N = 2V -5 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) 0 -5 8 6 4 5 4 3 2 1 0 -1 4 0.1 0.2 0.3 0.4 0.5 0.6 TIME (ms) CL = 4.7 µF IL = 100mA 2 0 -2 -50 50 100 150 200 250 300 TIME (µs) 0 50 100 150 200 250 300 TIME (µs) Enable Voltage Threshold vs. Temperature 1.6 35 IL = 100µA 30 Enable Transient (3.3V Version) Enable Current Threshold vs. Temperature 10 1x100 0 10 20 TIME (ms) CL = 10 µF IL = 1mA 5 2 -0.1 0 0.8 CL = 4.7 µF IL = 1mA -2 -50 7 1000 0.001 0.6 2 Output Impedance 100 0.2 0.4 TIME (ms) ENABLE (V) OUTPUT (V) SUPPLY CURRENT (mA) 30 20 0 Enable Transient (3.3V Version) 60 OUTPUT IMPEDANCE (Ω) 10 4 2 -0.2 0 Line Transient 6 Supply Current vs. Supply Voltage (3.3V Version) 40 0 -10 15 -5 0 1 2 3 4 5 6 7 8 9 10 SUPPLY VOLTAGE (V) 50 100 10 CL = 1 µF IL = 1mA 5 CL = 47µF 200 INPUT (V) 40 0 8 8 -10 60 0 2 4 6 TIME (ms) 0 -10 -20 -30 300 Line Transient ∆ OUTPUT (mV) 100 0 10 INPUT (V) SUPPLY CURRENT (mA) 120 CL = 4.7µF -20 300 -30 ENABLE VOLTAGE (V) 0 OUTPUT (mA) ∆ OUTPUT (mV) 150 0 -10 20 10 ∆ OUTPUT (mV) 200 20 10 OUTPUT (V) 250 100 Load Transient Load Transient OUTPUT (mA) ∆ OUTPUT (mV) SHORT CIRCUIT CURRENT (mA) Short Circuit Current vs. Input Voltage 300 1.4 1.2 CIN = 2.2µF COUT = 4.7µF 1 0.8 ON OFF 0.6 0.4 -60 -30 0 30 60 90 120 150 TEMPERATURE (°C) FREQUENCY (Hz) MIC5201 6 June 2005 MIC5201 Micrel, Inc. Ripple vs. Frequency FREQUENCY (Hz) June 2005 FREQUENCY (Hz) 7 40 1x106 0 100x103 20 10x103 1x106 100x103 0 10x103 20 IL = 100mA 60 1x103 40 80 100x100 60 1x103 1x106 100x103 10x103 10x100 0 1x103 20 IL = 1mA 100x100 40 80 10x100 RIPPLE VOLTAGE (dB) 60 100x100 RIPPLE VOLTAGE (dB) IL = 100µA 100 RIPPLE VOLTAGE (dB) 100 100 80 Ripple vs. Frequency 10x100 Ripple vs. Frequency FREQUENCY (Hz) MIC5201 MIC5201 Micrel, Inc. Applications Information VIN IN Figure 1 shows a basic fixed-voltage application with the unused enable input connected to VIN. MIC5201-x.xBM MIC5201-x.xBS VIN IN EN R1 3.3µF R2 CADJ Figure 3. Decreasing Ouput Noise 1µF Minimum Load The MIC5201 will remain stable and in regulation with no load unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Dual-Supply Systems When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground. Thermal Considerations Layout The MIC5201-x.xBM (8-pin surface mount package) has the following thermal characteristics when mounted on a single layer copper-clad printed circuit board. Figure 1. Fixed Application Adjustable regulators require two resistors to set the output voltage. See Figure 2. MIC5201BM EN ADJ GND OUT GND IN VOUT OUT VOUT EN VIN MIC5201BM VOUT OUT ADJ GND R1 3.3µF R2 R2 VOUT = 1.242V 1 + R1 Figure 2. Adjustable Application Resistors values are not critical because ADJ (adjust) has a high impedance, but for best results use resistors of 470kΩ or less. PC Board Dielectric FR4 Ceramic Output Capacitors A 1µF capacitor is recommended between the MIC5201 output and ground to prevent oscillations due to instability. Larger values serve to improve the regulator’s transient response. Most types of tantalum or aluminum electrolytics will be adequate; film types will work, but are costly and therefore not recommended. Many aluminum electrolytics have electrolytes that freeze at about –30°C, so solid tantalums are recommended for operation below –25°C. The important parameters of the capacitor are an effective series resistance of about 5Ω or less and a resonant frequency above 500kHz. The value of this capacitor may be increased without limit. θJA 160ºC/W 120ºC/W Multilayer boards having a ground plane, wide traces near the pads, and large supply bus lines provide better thermal conductivity. The “worst case” value of 160°C/W assumes no ground plane, minimum trace widths, and a FR4 material board. Nominal Power Dissipation and Die Temperature The MIC5201-x.xBM at a 25°C ambient temperature will operate reliably at up to 625mW power dissipation when mounted in the “worst case” manner described above. At an ambient temperature of 55°C, the device may safely dissipate 440mW. These power levels are equivalent to a die temperature of 125°C, the recommended maximum temperature for non-military grade silicon integrated circuits. At lower values of output current, less output capacitance is required for output stability. The capacitor can be reduced to 0.47µF for current below 10mA or 0.33µF for currents below 1mA. For MIC5201-x.xBS (SOT-223 package) heat sink characteristics, please refer to Micrel Application Hint 17, P.C. Board Heat Sinking. Input Capacitors A 1µF capacitor should be placed from the MIC5201 input to ground if there is more than 10 inches of wire between the input and the ac filter capacitor or if a battery is used as the input. Noise Reduction Capacitors On adjustable devices, a capacitor from ADJ to GND will decrease high-frequency noise on the output. See Figure 3. 50 mil 245 mil 150 mil 30 mil 50 mil Figure 4. Min. Recommended SO-8 PCB Pads Size MIC5201 8 June 2005 MIC5201 Micrel, Inc. Package Information 0.026 (0.65) MAX) PIN 1 0.157 (3.99) 0.150 (3.81) DIMENSIONS: INCHES (MM) 0.020 (0.51) 0.013 (0.33) 0.050 (1.27) TYP 0.064 (1.63) 0.045 (1.14) 45° 0.0098 (0.249) 0.0040 (0.102) 0°–8° 0.197 (5.0) 0.189 (4.8) 0.010 (0.25) 0.007 (0.18) 0.050 (1.27) 0.016 (0.40) SEATING PLANE 0.244 (6.20) 0.228 (5.79) 8-Pin SOP (M) 3.15 (0.124) 2.90 (0.114) CL 3.71 (0.146) 7.49 (0.295) 3.30 (0.130) 6.71 (0.264) CL 2.41 (0.095) 2.21 (0.087) 1.04 (0.041) 0.85 (0.033) 4.7 (0.185) 4.5 (0.177) 0.10 (0.004) 0.02 (0.0008) DIMENSIONS: MM (INCH) 6.70 (0.264) 6.30 (0.248) 1.70 (0.067) 16° 1.52 (0.060) 10° 10° MAX 0.038 (0.015) 0.25 (0.010) 0.84 (0.033) 0.64 (0.025) 0.91 (0.036) MIN SOT-223 (S) MICREL INC. TEL 2180 FORTUNE DRIVE + 1 (408) 944-0800 FAX SAN JOSE, CA 95131 USA + 1 (408) 474-1000 WEB http://www.micrel.com This 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. © 1998 Micrel Incorporated June 2005 9 MIC5201