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MIC5206
150mA Low-Noise LDO Regulator
General Description
The MIC5206 is an efficient linear voltage regulator with very low dropout voltage (typically 17mV at light loads and 165mV at 150mA), and very low ground current (600A at 100mA output), with better than 1% initial accuracy. It has a logic compatible enable/shutdown control input and an internal undervoltage monitor. Designed especially for hand-held, battery-powered devices, the MIC5206 can be switched by a CMOS or TTL compatible logic signal. When disabled, power consumption drops nearly to zero. Dropout ground current is minimized to prolong battery life. Key features include an undervoltage monitor with an error flag output, a reference bypass pin to improve its already low-noise performance (8-pin versions only), reversedbattery protection, current limiting, and overtemperature shutdown. The MIC5206 is available in several fixed voltages in a tiny SOT-23-5 package. It features a pinout, similar to the LP2980, but has significantly better performance. Fixed and adjustable output voltage versions, featuring the reference bypass option, are available in the 8-pin Micrel Mini 8TM 8-pin MSOP (micro small-outline package). For low-dropout regulators that are stable with ceramic output capacitors, see the Cap MIC5245/6/7 family. Data sheets and support documentation can be found on Micrel's web site at www.micrel.com.
Features
* * * * * * * * * * * * Error flag indicates undervoltage fault High output voltage accuracy Guaranteed 150mA output Ultra-low-noise output (8-pin versions) Low quiescent current Low dropout voltage Extremely tight load and line regulation Very low temperature coefficient Current and thermal limiting Reversed-battery protection "Zero" off-mode current Logic-controlled electronic enable
Applications
* * * * * * * Cellular telephones Laptop, notebook, and palmtop computers Battery-powered equipment PCMCIA VCC and VPP regulation/switching Consumer/personal electronics SMPS post-regulator/dc-to-dc modules High-efficiency linear power supplies
Typical Application
SOT-23-5 Fixed Voltage Application
Micrel Mini 8 is a trademark of Micrel, Inc.
Adjustable Voltage Application
Micrel Inc. * 2180 Fortune Drive * San Jose, CA 95131 * USA * tel +1 (408) 944-0800 * fax + 1 (408) 474-1000 * http://www.micrel.com
May 2006
M9999-051506 (408) 955-1690
Micrel, Inc.
MIC5206
Ordering Information
Part Number Standard MIC5206-2.5BM5 MIC5206-2.7BM5 MIC5206-3.0BM5 MIC5206-3.2BM5 MIC5206-3.3BM5 MIC5206-3.6BM5 MIC5206-3.8BM5 MIC5206-4.0BM5 MIC5206-5.0BM5 MIC5206BMM MIC5206-3.0BMM MIC5206-3.3BMM MIC5206-3.6BMM MIC5206-3.8BMM MIC5206-4.0BMM MIC5206-5.0BMM Marking LD25 LD27 LD30 LD32 LD33 LD36 LD38 LD40 LD50 Pb-Free MIC5206-2.5YM5 MIC5206-2.7YM5 MIC5206-3.0YM5 MIC5206-3.2YM5 MIC5206-3.3YM5 MIC5206-3.6YM5 MIC5206-3.8YM5 MIC5206-4.0YM5 MIC5206-5.0YM5 MIC5206YMM MIC5206-3.0YMM MIC5206-3.3YMM MIC5206-3.6YMM MIC5206-3.8YMM MIC5206-4.0YMM MIC5206-5.0YMM Marking LD25 LD27 LD30 LD32 LD33 LD36 LD38 LD40 LD50 Voltage* 2.5V 2.7V 3.0V 3.2V 3.3V 3.6V 3.8V 4.0V 5.0V ADJ 3.0V 3.3V 3.6V 3.8V 4.0V 5.0V Junction Temp. Range -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C Package 5-Pin SOT-23 5-Pin SOT-23 5-Pin SOT-23 5-Pin SOT-23 5-Pin SOT-23 5-Pin SOT-23 5-Pin SOT-23 5-Pin SOT-23 5-Pin SOT-23 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP
* Other voltages available. Contact Micrel for details.
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Micrel, Inc.
MIC5206
Pin Configuration
MIC5206-xxBM5/YM5 (Fixed Output Voltage)
MIC5206-xxBMM/YMM (Fixed Output Voltage)
MIC5206-BMM/YMM (Adjustable Output Voltage)
Pin Description
Pin Number SOT-23-5 1 2 3 4 Pin Number MSOP-8 8 4, 6 7 3 5 (fixed) 5 (adj.) 5 1, 2 Pin Name IN GND EN FLAG BYP ADJ OUT Pin Function Supply Input Ground Enable/Shutdown (Input): CMOS compatible input. Logic high = enable, logic low or open = shutdown. Do not leave floating. Error Flag (Output): Open-collector output. Active low indicates an output undervoltage condition Reference Bypass: Connect external 470pF capacitor to GND to reduce output noise. May be left open Adjust (Input): Adjustable regulator feedback input. Connect to resistor voltage divider. Regulator Output
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Micrel, Inc.
MIC5206
Absolute Maximum Ratings(1)
Supply Input Voltage (VIN).............................. -20V to +20V Enable Input Voltage (VEN)............................. -20V to +20V Power Dissipation (PD) .......................... Internally Limited (3) Junction Temperature (TJ) ........................-40C to +125C Lead Temperature (soldering, 5 sec)......................... 260C
Operating Ratings(2)
Supply Input Voltage (VIN)............................. +2.5V to +16V Enable Input Voltage (VEN)..................................... 0V to VIN Junction Temperature ............................... -40C to +125C SOT-23-5 (JA) (3) MSOP-8 (JA) (3)
Electrical Characteristics
VIN = VOUT + 1V; IL = 100A; CL = 1.0F; 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 Temperature Coefficient Line Regulation Load Regulation Dropout Voltage, Note 6 Condition Variation from nominal VOUT Note 4 VIN = VOUT + 1V to 16V IL = 0.1mA to 150mA, Note 5 IL = 100A IL = 50mA IL = 100mA IL = 150mA IGND IGND Quiescent Current Ground Pin Current, Note 7 VEN 0.4V (shutdown) VEN 0.18V (shutdown) VEN 2.0V, IL = 100A IL = 50mA IL = 100mA IL = 150mA PSRR ILIMIT VO/PD eno Ripple Rejection Current Limit Thermal Regulation Output Noise VOUT = 0V Note 8 IL = 50mA, CL = 4.7F, 470pF from BYP to GND (MM package only) Regulator shutdown Regulator enable VIL 0.4V VIL 0.18V VIH 2.0V VIH 2.0V 2.0 0.01 5 -1 -2 20 25 17 110 140 165 0.01 80 350 600 1300 75 320 0.05 260 500 50 70 150 230 250 300 275 350 1 5 125 150 600 800 1000 1500 1900 2500 mV mV mV mV mV mV mV mV A A A A A A A A A A dB mA %/W nVHz Min -1 -2 40 Typ Max 1 2 Units % % ppm/C
Enable Input VIL VIH IIL IIH Enable Input Logic-Low Voltage Enable Input Logic-High Voltage Enable Input Current 0.4 0.18 V V V A A A A
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MIC5206
Symbol VERR VOL IFL
Notes:
Parameter Flag Threshold Output Logic-Low Voltage Flag Leakage Current
Condition Undervoltage condition (below nominal) Note 9 IL = 1mA, undervoltage condition Flag off, VFLAG = 0V to 16V
Min -2
Typ -6 0.2
Max -10 0.4 +1
Units % V A
Error Flag Output
-1
0.1
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 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 of theMIC5205-x.xBM5 (all versions) is 220C/W, and the MIC5206-x.xBMM (all versions) is 200C/W, mounted on a PC board (see "Thermal Considerations" for further details). 4. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. 5. 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. 6. Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1Vdifferential. 7. 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. 8. 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. 9. The error flag comparator includes 3% hysteresis.
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M9999-051506 (408) 955-1690
Micrel, Inc.
MIC5206
Typical Characteristics
0 -20 PSRR (dB) -40 -60 -80 IOUT = 100A COUT = 1F
Power Supply Rejection Ratio
VIN = 6V VOUT = 5V PSRR (dB)
0 -20 -40 -60 -80
Power Supply Rejection Ratio
RIPPLE REJECTION (dB) VIN = 6V VOUT = 5V
60 50 40 30 20 10 0
Power Supply Ripple Rejection vs. Voltage Drop
1mA 10mA IOUT = 100mA
-100 1E+1 1E+2 1E+3 1E+4 1E+5 1E+61E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
-100 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
IOUT = 100A COUT = 2.2F CBYP = 0.01F
COUT = 1F 0.1 0.2 0.3 VOLTAGE DROP (V) 0.4
0
0 -20 PSRR (dB) -40 -60 -80
Power Supply Rejection Ratio
VIN = 6V VOUT = 5V PSRR (dB)
0 -20 -40 -60 -80
Power Supply Rejection Ratio
RIPPLE REJECTION (dB) VIN = 6V VOUT = 5V
-100 1E+1 1E+2 1E+3 1E+4 1E+5 1E+61E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
IOUT = 1mA COUT = 1F
IOUT = 1mA COUT = 2.2F CBYP = 0.01F
-100 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
100 90 80 70 60 50 40 30 20 10 0 0
Power Supply Ripple Rejection vs. Voltage Drop
1mA
IOUT = 100mA 10mA COUT = 2.2F CBYP = 0.01F 0.1 0.2 0.3 VOLTAGE DROP (V) 0.4
0
Power Supply Rejection Ratio
0 -20 PSRR (dB) -40 -60 -80
Power Supply Rejection Ratio
VIN = 6V VOUT = 5V TIME (s)
VIN = 6V -20 VOUT = 5V PSRR (dB) -40 -60 -80 IOUT = 10mA COUT = 1F
10000
Turn-On Time vs. Bypass Capacitance
1000
-100 1E+11E+21E+31E+41E+51E+61E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
-100 1E+11E+21E+31E+41E+51E+61E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
IOUT = 10mA COUT = 2.2F CBYP = 0.01F
100
10 10
100 1000 10000 CAPACITANCE (pF)
0 -20 PSRR (dB) -40 -60 -80
Power Supply Rejection Ratio
VIN = 6V VOUT = 5V PSRR (dB)
0 -20 -40 -60 -80
Power Supply Rejection Ratio
VIN = 6V VOUT = 5V NOISE (V/ Hz)
10 1 0.1 0.01 0.001
Noise Performance
10mA, C = 1F OUT
1mA COUT = 1F CBYP = 10nF
IOUT = 100mA COUT = 1F
-100 1E+11E+21E+31E+41E+51E+61E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
-100 1E+11E+21E+31E+41E+51E+61E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
IOUT = 100mA COUT = 2.2F CBYP = 0.01F
VOUT = 5V 0.0001 1E+11E+21E+3 1E+41E+5 1E+61E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
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M9999-051506 (408) 955-1690
Micrel, Inc.
MIC5206
Typical Characteristics
10 1 NOISE (V/ Hz) 0.1 0.01 VOUT = 5V 1mA 0.001 C OUT = 10F electrolytic 0.0001 1E+11E+2 1E+31E+4 1E+51E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
Noise Performance
100mA NOISE (V/ Hz) 10mA
10 1 0.1 0.01
Noise Performance
10 1
Noise Performance
100mA
10mA
NOISE (V/ Hz)
100mA
0.1 1mA VOUT = 5V COUT = 10F 0.001 electrolytic 10mA CBYP = 100pF 0.0001 1E+11E+2 1E+31E+4 1E+51E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 0.01
VOUT = 5V COUT = 22F 1mA 0.001 tantalum CBYP = 10nF 0.0001 1E+11E+2 1E+31E+4 1E+51E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
10 1 NOISE (V/ Hz) 0.1
Noise Performance
10 1 NOISE (V/ Hz) 0.1
Noise Performance
DROPOUT VOLTAGE (mV)
320 280 240 200 160 120 80 40 0 0
Dropout Voltage vs. Output Current
10mA 100mA
10mA 100mA
+125C +25C
0.01 V 1mA = 5V OUT COUT = 10F 0.001 electrolytic CBYP = 1nF 0.0001 1E+11E+2 1E+31E+4 1E+51E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
0.01 V 1mA = 5V OUT COUT = 10F 0.001 electrolytic CBYP = 1nF 0.0001 1E+11E+2 1E+31E+4 1E+51E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
-40C
40 80 120 160 OUTPUT CURRENT (mA)
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MIC5206 No-Load Stability The MIC5205 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. Error Flag Output The error flag is an open-collector output and is active (low) when an undervoltage of approximately 5% below the nominal output voltage is detected. A pull-up resistor from IN to FLAG is shown in all schematics. If an error indication is not required, FLAG may be left open and the pull-up resistor may be omitted. Enable Pin Ramp and the Error Flag To prevent indeterminate behavior on the error flag during power down of the device, ensure that the fall time of the enable pin signal, from logic high to logic low, is faster than 100s. Fixed Regulator Applications
Application Information
Enable/Shutdown Forcing EN (enable/shutdown) high (> 2V) enables the regulator. EN is compatible with CMOS logic gates. If the enable/shutdown feature is not required, connect EN (enable) to IN (supply input). Refer to the text with Figures 1aand 2. Input Capacitor A 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 if a battery is used as the input. Reference Bypass Capacitor BYP (reference bypass) is connected to the internal voltage reference. A 470pF capacitor (CBYP) connected from BYP to GND quiets this reference, providing a significant reduction in output noise. See Figure 2. CBYP reduces the regulator phase margin; when using CBYP, output capacitors of 2.2F or greater are generally required to maintain stability. The start-up speed of the MIC5206 is inversely proportional to the size of the reference bypass capacitor. Applications requiring a slow ramp-up of output voltage should consider larger values of CBYP. Likewise, if rapid turn-on is necessary, consider omitting CBYP. If output noise is not a major concern, omit CBYP and leave BYP open. Output Capacitor An output capacitor is required between OUT and GND to prevent oscillation. The minimum size of the output capacitor is dependent upon whether a reference bypass capacitor is used. 1.0F minimum is recommended when CBYP is not used (see Figure 2). 2.2F minimum is recommended when CBYP is 470pF (see Figure 2). Larger values improve the regulator's transient response. The output capacitor value may be increased without limit. The output capacitor should have an ESR (effective series resistance) of about 5 or less and a resonant frequency above 1MHz. Most tantalum or aluminum electrolytic capacitors are adequate; film types will work, but are more expensive. Since many aluminum electrolytics have electrolytes that freeze at about -30C, solid tantalums are recommended for operation below -25C. At lower values of output current, less output capacitance is required for output stability. The capacitor can be reduced to 0.47F for current below 10mA or 0.33F for currents below 1mA. May 2006 8
Figure 1a. Low-Noise Fixed Voltage Application
EN (pin 3) is shown connected to IN (pin 1) for an application where enable/shutdown is not required. The error flag is shown with a 100k pull-up resistor.
Figure 1b. Low-Noise Fixed Voltage Application
Figure 1b is an example of a basic configuration where the lowest-noise operation is not required. COUT = 1F minimum. The error flag is shown with a 47k pull-up resistor.
M9999-051506 (408) 955-1690
Micrel, Inc. Ultra-Low-Noise Application
MIC5206 Thermal Considerations Layout The MIC5206-x.xBM5 (5-pin SOT-23 package) has the following thermal characteristics when mounted on a single layer copper-clad printed circuit board.
Multilayer boards having a ground plane, wide traces near the pads, and large supply bus lines provide better thermal conductivity.
PC Board Dielectric FR4 Ceramic JA 220C/W 200C/W
Figure 2. Ultra-Low-Noise Fixed Voltage Application
Figure 2 includes a 470pF capacitor for low-noise operation and shows EN (pin 7) connected to IN (pin 8) for an application where enable/shutdown is not required. The error flag is shown with a 47k pull-up resistor. Adjustable Regulator Applications Figure 3 shows the MIC5206BMM adjustable output voltage configuration. Two resistors set the output voltage. The formula for output voltage is:
R2 VOUT = 1.242V x + 1 R1 Resistor values are not critical because ADJ (adjust) has a high input impedance, but for best results use resistors of 470k or less. A capacitor from ADJ to ground provides greatly improved noise performance.
SOT-23-5 Thermal Characteristics
The "worst case" value of 220C/W assumes no ground plane, minimum trace widths, and a FR4 material board. The MIC5206-xxBMM (8-pin MSOP) has a thermal resistance of 200C/W when mounted on a FR4 board with minimum trace widths and no ground plane.
PC Board Dielectric FR4 JA 200C
MSOP Thermal Characteristics
Nominal Power Dissipation and Die Temperature The MIC5206-x.xBM5 at a 25C ambient temperature will operate reliably at over 450mW power dissipation when mounted in the "worst case" manner described above. At an ambient temperature of 40C, the device may safely dissipate over 380mW. These power levels are equivalent to a die temperature of 125C, the maximum operating junction temperature for the MIC5206. For additional heat sink characteristics, please refer to Micrel Application Hint 17, "Calculating P.C. Board Heat Sink Area For Surface Mount Packages".
Figure 3. Ultra-Low-Noise Adjustable Voltage Application
Figure 3 also includes a 470pF capacitor for lowestnoise operation and shows EN (pin 7) connected to IN (pin 8) for an application where enable/shutdown is not required. COUT = 2.2F minimum. The error flag is shown with a 47k pull-up resistor.
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Micrel, Inc.
MIC5206
Package Information
5-Pin SOT-23 (M5)
8-Pin MSOP (MM)
May 2006
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M9999-051506 (408) 955-1690
Micrel, Inc.
MIC5206
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. (c) 2000 Micrel, Incorporated.
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M9999-051506 (408) 955-1690

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