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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.
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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
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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:
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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)
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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)
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1x106
1x106
1x103
1x106
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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)
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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
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