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MIC5210
Micrel
MIC5210
Dual 100mA LDO Regulator
Advance Information
General Description
The MIC5210 is a dual linear voltage regulator with very low dropout voltage (typically 10mV at light loads and 140mV at 100mA), very low ground current (225A at 10mA output), and better than 3% initial accuracy. It also features individual logic-compatible enable/shutdown control inputs. Designed especially for hand-held battery powered devices, the MIC5210 can be switched by a CMOS or TTL compatible logic signal, or the enable pin can be connected to the supply input for 3-terminal operation. When disabled, power consumption drops nearly to zero. Dropout ground current is minimized to prolong battery life. Key features include current limiting, overtemperature shutdown, and protection against reversed battery. The MIC5210 is available in 3.0V, 3.3V, 3.6V, 4.0V and 5.0V fixed voltage configurations. Other voltages are available; contact Micrel for details.
Features
* * * * * * * * * * * Micrel Mini 8TM MSOP package Guaranteed 100mA outputs Low quiescent current Low dropout voltage Wide selection of output voltages Tight load and line regulation Low temperature coefficient Current and thermal limiting Reversed input polarity protection Zero off-mode current Logic-controlled electronic enable
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 MIC5210-3.0BMM MIC5210-3.3BMM MIC5210-3.6BMM MIC5210-4.0BMM MIC5210-5.0BMM Voltage 3.0 3.3 3.6 4.0 5.0 Accuracy 1.0% 1.0% 1.0% 1.0% 1.0% Junction Temp. Range* -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package 8-lead MSOP 8-lead MSOP 8-lead MSOP 8-lead MSOP 8-lead MSOP
Other voltages available. Contact Micrel for details.
Typical Application
MIC5210 Output A 1F Output B 2.2F CBYP 470F
1 2 3 4 8 7 6 5
Enable A Enable B 1F
Enable may be connected to VIN
Low-Noise + Ultralow-Noise (Dual) Regulator
MM8 and Micrel Mini 8 are trademarks 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
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MIC5210
MIC5210
Micrel
Pin Configuration
OUTA GND OUTB BYPB
1 2 3 4
8 7 6 5
INA ENA INB ENB
MIC5210BMM
Pin Description
Pin Number 1 2 3 4 5 6 7 8 Pin Name OUTA GND OUTB BYPB ENB INB ENA INA Pin Function Regulator Output A Ground: Both pins must be connected together. Regulator Output B Reference Bypass B: Connect external 470pF capacitor to GND to reduce output noise in regulator "B". May be left open. Enable/Shutdown B (Input): CMOS compatible input. Logic high = enable, logic low or open = shutdown. Do not leave floating. Supply Input B Enable/Shutdown A (Input): CMOS compatible input. Logic high = enable, logic low or open = shutdown. Do not leave floating. Supply Input A
Absolute Maximum Ratings
Supply Input Voltage (VIN) ............................ -20V to +20V Enable Input Voltage (VEN) ........................... -20V to +20V Power Dissipation (PD) ............................ Internally Limited Storage Temperature Range ................... -60C to +150C Lead Temperature (soldering, 5 sec.) ....................... 260C
Recommended Operating Conditions
Supply Input Voltage (VIN) ............................... 2.5V to 16V Enable Input Voltage (VEN) ................................. 0V to 16V Junction Temperature (TJ) ....................... -40C to +125C 8-lead MSOP (JA) ................................................... Note 1
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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 4 Conditions variation from specified VOUT Note 2 VIN = VOUT + 1V to 16V IL = 0.1mA to 150mA (Note 3) IL = 100A IL = 50mA IL = 100mA IL = 150mA IGND IGND Quiescent Current Ground Pin Current, Note 5 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 frequency = 100Hz, IL = 100A VOUT = 0V Note 6 IL = 50mA, CL = 2.2F, 470pF from BYP to GND Min -1 -2 40 0.004 0.02 10 110 140 165 0.01 80 350 600 1300 75 320 0.05 260 0.012 0.05 0.2 0.5 50 70 150 230 250 300 275 350 1 5 125 150 600 800 1000 1500 1900 2500 500 500 Typical Max 1 2 Units % % ppm/C %/V %/V % % mV mV mV mV mV mV mV mV A A A A A A A A A A dB mA %/W
nV Hz
ENABLE Input VIL VIH IIL IIH
Note 1:
Enable Input Logic-Low Voltage Enable Input Logic-High Voltage Enable Input Current
regulator shutdown regulator enabled VIL 0.4V VIL 0.18V VIH 2.0V VIH 2.0V 2.0 0.01 5
0.4 0.18
V V V A A A A
-1 -2 20 25
Note 2: Note 3: Note 4: Note 5: Note 6:
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 operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(max), the junction-to-ambient thermal resistance, JA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: 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 the 8-lead MSOP (MM) is 200C/W mounted on a PC board (see "Thermal Considerations" section for further details). 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.
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Typical Characteristics
Power Supply Ripple Rejection vs. Voltage Drop
60 RIPPLE REJECTION (dB) 50 TIME (s) 40 30 20 10 0 0 COUT = 1F 0.1 0.2 0.3 VOLTAGE DROP (V) 0.4 10 10 100 1000 CAPACITANCE (pF) 10000 1mA 1000 10000 DROPOUT VOLTAGE (mV)
Turn-On Time vs. Bypass Capacitance
320 280 240 200 160 120 80 40 0 0
Dropout Voltage vs. Output Current
+125C +25C
10mA
IOUT = 100mA
100
-40C
40 80 120 160 OUTPUT CURRENT (mA)
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 PSRR (dB)
0 -20 -40 -60 -80
Power Supply Rejection Ratio
VIN = 6V VOUT = 5V
IOUT = 100mA COUT = 1F
IOUT = 10mA COUT = 1F
IOUT = 1mA COUT = 1F
-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 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+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)
0 -20 PSRR (dB) -40 -60 -80
Power Supply Rejection Ratio
VIN = 6V VOUT = 5V
Noise Performance
10 1 NOISE (V/Hz) 0.1 0.01 0.001 VOUT = 5V COUT = 10F electrolytic 1mA 100mA 10mA NOISE (V/Hz) 10 1 0.1
Noise Performance
100mA
IOUT = 100A COUT = 1F
-100 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
0.0001 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
1mA VOUT = 5V COUT = 10F 0.001 electrolytic 10mA CBYP = 100pF 0.0001 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
0.01
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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. No-Load Stability The MIC5210 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. Dual-Supply Operation 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 Multilayer boards having a ground plane, wide traces near the pads, and large supply bus lines provide better thermal conductivity. The MIC5210-xxBMM (8-lead 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
Applications 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 to IN (supply input). 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. 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 MIC5210 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 470F (see Figure 1). 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
MSOP Thermal Characteristics For additional heat sink characteristics, please refer to Micrel Application Hint 17, "Calculating P.C. Board Heat Sink Area For Surface Mount Packages".
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MIC5210
Micrel
Package Information
0.122 (3.10) 0.112 (2.84)
0.199 (5.05) 0.187 (4.74)
DIMENSIONS: INCH (MM)
0.120 (3.05) 0.116 (2.95) 0.036 (0.90) 0.032 (0.81) 0.043 (1.09) 0.038 (0.97) 0.012 (0.30) R
0.007 (0.18) 0.005 (0.13)
0.012 (0.03) 0.0256 (0.65) TYP
0.008 (0.20) 0.004 (0.10)
5 MAX 0 MIN
0.012 (0.03) R 0.039 (0.99) 0.035 (0.89) 0.021 (0.53)
8-Lead MSOP (MM) MM8TM Micrel Mini 8TM
MIC5210
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Micrel
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MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
USA
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
WEB
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. (c) 1997 Micrel Incorporated
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