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MIC5201-3.3BM [MICREL]

200mA Low-Dropout Voltage Regulator; 200毫安低压差稳压器
MIC5201-3.3BM
型号： MIC5201-3.3BM
厂家： MICREL SEMICONDUCTOR    MICREL SEMICONDUCTOR
描述：

200mA Low-Dropout Voltage Regulator
200毫安低压差稳压器

稳压器
文件： 总12页 (文件大小：134K)
中文：  中文翻译
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MIC5201  
200mA Low-Dropout Voltage 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.  
• 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  
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 V if unneeded. When disabled, power consumption  
IN  
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.  
• Logic-controlled electronic enable  
• Available in SO-8 and SOT-223 packages  
Applications  
The MIC5201 is available in several fixed voltages and  
accuracy configurations. It features the same pinout as the  
LT1121withbetterperformance. Otheroptionsareavailable;  
contact Micrel for details.  
• Cellular telephones  
• Laptop, notebook, and palmtop computers  
• Battery powered equipment  
• PCMCIA V and V regulation/switching  
CC  
PP  
• Bar code scanners  
• SMPS post-regulator/ dc-to-dc modules  
• High-efficiency linear power supplies  
Ordering Information  
Part Number  
Voltage Junction Temp. Range*  
Package  
SO-8  
MIC5201BM  
Adj  
3.0  
3.3  
5.0  
3.0  
3.3  
4.85  
5.0  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
MIC5201-3.0BM  
MIC5201-3.3BM  
MIC5201-5.0BM  
MIC5201-3.0BS  
MIC5201-3.3BS  
MIC5201-4.8BS  
MIC5201-5.0BS  
SO-8  
SO-8  
SO-8  
SOT-223  
SOT-223  
SOT-223  
SOT-223  
Other voltages available. Contact Micrel for details.  
* Junction Temperature.  
Typical Application  
ENABLE  
SHUTDOWN  
MIC5201-3.3  
VOUT  
3.3V  
IN  
OUT  
EN  
GND  
1µF  
MM8 is a trademark 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  
July 1998  
1
MIC5201  
MIC5201  
Micrel  
Pin Configuration  
GND  
TAB  
1
2
3
IN  
GND OUT  
1
2
3
4
8
7
6
5
OUT  
NC  
IN  
1
2
3
4
8
7
6
5
OUT  
ADJ  
GND  
NC  
IN  
MIC5201-x.xBS  
SOT-223  
NC  
NC  
EN  
NC  
NC  
EN  
Fixed  
GND  
NC  
MIC5201-x.xBM  
8-Lead SOIC  
Fixed  
MIC5201BM  
8-Lead SOIC  
Adjustable  
Pin Description  
Pin No.  
Pin No.  
Pin No.  
Pin Name  
Pin Function  
SOT-223 SO-8 Adj. SO-8 Fixed  
3
1
2
1
OUT  
ADJ  
NC  
Regulated Output  
Feedback Input: (Adjustable version only)  
4, 6, 7  
2, 4, 6, 7  
not internally connected: Connect to ground plane for lowest thermal  
resistance.  
2
1
3
5
3
5
GND  
EN  
Ground  
Enable (Input): TTL compatible input. High = enable.  
Low or open = off/disable.  
8
8
VIN  
Unregulated Supply Input  
Absolute Maximum Ratings  
Operating Ratings  
Supply Input Voltage (V ) Fixed .................. –20V to +60V  
Supply Input Voltage (V ) Fixed ................... 2.5V to +26V  
IN  
IN  
Supply Input Voltage (V ) Adjustable .......... –20V to +20V  
Supply Input Voltage (V ) Adjustable ........... 2.5V to +16V  
IN  
IN  
Enable Input Voltage (V ) Fixed ................. –20V to +60V  
Enable Input Voltage (V ) .................................. 0V to V  
EN  
EN  
IN  
Enable Input Voltage (V ) Adjustable ......... –20V to +20V  
Junction Temperature (T ) ....................... –40°C to +125°C  
EN  
J
Power Dissipation (P ) ............................ Internally Limited  
D
Junction Temperature (T ) ....................... –40°C to +125°C  
J
Lead Temperature (soldering, 5 sec.) ....................... 260°C  
MIC5201  
2
July 1998  
MIC5201  
Micrel  
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  
Typ  
Max  
Units  
VO  
Output Voltage Accuracy  
Variation from specified VOUT  
–1  
–2  
1
2
%
%
∆VO/∆T  
∆VO/VO  
Output Voltage Temperature Coef.  
Line Regulation, Fixed  
Note 2  
40  
150 ppm/°C  
VIN = VOUT + 1V to 26V  
0.004  
0.20  
%
%
0.40  
∆VO/VO  
∆VO/VO  
VIN – VO  
Line Regulation, Adjustable  
Load Regulation  
VIN = VOUT + 1V to 16V  
0.004  
0.04  
0.20  
0.40  
%
%
IL = 0.1mA to 200mA, Note 3  
0.16  
0.30  
%
%
Dropout Voltage, Note 4  
IL = 100µA  
IL = 20mA  
IL = 50mA  
IL = 100mA  
IL = 200mA  
17  
mV  
mV  
mV  
mV  
mV  
130  
180  
225  
270  
400  
IGND  
IGND  
Quiescent Current  
Ground Pin Current  
V
ENABLE ≤ 0.7V (shutdown)  
0.01  
µA  
IL = 100µA  
IL = 20mA  
IL = 50mA  
IL = 100mA  
IL = 200mA  
130  
270  
500  
1000  
3000  
µA  
µA  
µA  
µA  
µA  
400  
2000  
PSRR  
Ripple Rejection  
75  
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  
0.05  
100  
500  
mA  
%/W  
µV  
∆VO/∆PD  
Thermal Regulation  
Output Noise  
Note 6  
en  
Enable Input  
VIL  
VIH  
IIL  
Input Voltage Level  
Input Voltage Level  
Enable Input Current  
Enable Input Current  
logic low (off)  
logic high (on)  
0.7  
V
V
2.0  
V
IL ≤ 0.7V  
IH ≤ 2.0V  
0.01  
15  
1
µA  
µA  
IIH  
V
50  
Reference (MIC5201 Adjustable Version Only)  
VREF  
Reference Voltage  
1.223 1.242 1.255  
1.217 1.267  
V
V
IIL  
Reference Voltage Temp. Coef.  
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, T  
, the junction-to-ambient thermal resistance, θ , and the ambient temperature, T . The maximum allowable power  
J(max)  
JA  
A
dissipation at any ambient temperature is calculated using: P  
= (T  
– T ) ÷ θ . Exceeding the maximum allowable power dissipation  
(max)  
J(max)  
A
JA  
will result in excessive die temperature, and the regulator will go into thermal shutdown. The θ of the MIC5201-x.xBS is 15°C/W and θ for  
JC  
JA  
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 V = 26V for fixed and V = 16V for adjustable at t = 10ms.  
IN  
IN  
July 1998  
3
MIC5201  
MIC5201  
Micrel  
Block Diagrams  
OUT  
IN  
VOUT  
COUT  
VIN  
Bandgap  
Ref.  
Current Limit  
Thermal Shutdown  
MIC5201-x.xBS  
GND  
Fixed Regulator (SOT-223 version only)  
OUT  
IN  
VOUT  
COUT  
VIN  
Bandgap  
Ref.  
EN  
Current Limit  
Thermal Shutdown  
MIC5201-x.xBM  
GND  
Fixed Regulator  
OUT  
ADJ  
IN  
VOUT  
COUT  
VIN  
R1  
R2  
Bandgap  
Ref.  
EN  
Current Limit  
Thermal Shutdown  
MIC5201BM [adj.]  
GND  
Adjustable Regulator  
MIC5201  
4
July 1998  
MIC5201  
Micrel  
Typical Characteristics  
Dropout Voltage  
vs. Output Current  
Dropout Voltage  
vs. Temperature  
Dropout  
Characteristics  
250  
0.4  
0.3  
0.2  
0.1  
0.0  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0.0  
200  
150  
100  
50  
IL = 100mA  
IL = 100mA  
IL = 100µA, 1mA  
IL = 1mA  
0
0.01 0.1  
1
10  
100 1000  
-60 -30  
0
30 60 90 120 150  
0
2
4
6
8
10  
OUTPUT CURRENT (mA)  
TEMPERATURE (°C)  
INPUT VOLTAGE (V)  
Ground Current  
vs. Output Current  
Output Voltage  
vs. Output Current  
Ground Current  
vs. Supply Voltage  
10  
1.6  
1.4  
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
0.0  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0.0  
CIN = 2.2µF  
COUT = 4.7µF  
IL = 100mA  
1
IL = 1mA  
0.1  
0.01  
0.1  
1
10  
100  
0
2
4
6
8
10  
0.0  
0.1  
0.2  
0.3  
OUTPUT CURRENT (mA)  
SUPPLY VOLTAGE (V)  
OUTPUT CURRENT (A)  
Ground Current  
vs. Temperature  
Ground Current  
vs. Temperature  
Thermal Regulation  
(3.3V Version)  
0.30  
0.25  
0.20  
0.15  
1.5  
1.4  
1.3  
1.2  
1.1  
1.0  
100  
ILOAD = 100µA  
CIN = 2.2µF  
COUT = 4.7µF  
ILOAD = 100mA  
CIN = 2.2µF  
COUT = 4.7µF  
50  
0
CL = 4.7 µF  
2-050  
100  
0
-100  
-60 -30  
0
30 60 90 120 150  
-50  
0
50  
100  
150  
-5  
0
5
10 15 20 25 30 35  
TIME (ms)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
Output Current  
vs. Temperature  
Minimum Input Voltage  
vs. Temperature  
Output Voltage vs. Temp.  
(3.3V Version)  
3.6  
3.5  
3.4  
3.3  
3.2  
3.1  
3.0  
300  
3.30  
3.29  
3.28  
3.27  
3.26  
3.25  
3.24  
3.23  
3.22  
3.21  
3.20  
280  
260  
240  
220  
200  
180  
160  
140  
120  
100  
CIN = 2.2µF  
COUT = 4.7µF  
CIN = 2.2µF  
COUT = 4.7µF  
ILOAD = 1mA  
VOUT = 3.3V  
3 DEVICES:  
HI / AVG / LO  
VOUT = 0V  
(SHORT CIRCUIT)  
CURVES APPLICABLE  
AT 100µA AND 100mA  
-60 -30  
0
30 60 90 120 150  
-60 -30  
0
30 60 90 120 150  
-60 -30  
0
30 60 90 120 150  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
July 1998  
5
MIC5201  
MIC5201  
Micrel  
Short Circuit Current  
vs. Input Voltage  
Load Transient  
Load Transient  
300  
20  
10  
20  
10  
250  
200  
150  
100  
50  
0
0
-10  
-20  
3-030  
-10  
-20  
3-030  
CL = 4.7µF  
CL = 47µF  
CIN = 2.2µF  
COUT = 4.7µF  
VOUT = 3.3V  
200  
100  
0
200  
100  
0
0
1
2
3
4
5
6
7
-2  
0
2
4
6
8
10  
INPUT VOLTAGE (V)  
-10  
0
10  
20  
30  
40  
TIME (ms)  
TIME (ms)  
Supply Current vs. Supply  
Voltage (3.3V Version)  
Line Transient  
Line Transient  
120  
100  
80  
60  
40  
20  
0
10  
5
15  
10  
5
CL = 1 µF  
IL = 1mA  
CL = 10 µF  
IL = 1mA  
0
-5  
0
-108  
-85  
6
4
2
6
4
2
RL = 33Ω  
0
1
2
3
4
5
6
7
8
9
10  
-0.2  
0
0.2  
0.4  
0.6  
0.8  
-0.1  
0
0.1 0.2 0.3 0.4 0.5 0.6  
TIME (ms)  
SUPPLY VOLTAGE (V)  
TIME (ms)  
Supply Current vs. Supply  
Voltage (3.3V Version)  
Enable Transient  
(3.3V Version)  
Enable Transient  
(3.3V Version)  
60  
50  
40  
30  
20  
10  
0
5
4
3
2
1
5
4
3
2
1
CL = 4.7 µF  
IL = 1mA  
CL = 4.7 µF  
IL = 100mA  
0
-41  
0
-41  
RL = 66Ω  
2
0
2
0
-2  
-50  
-2  
-50  
0
1
2
3
4
5
6
7
0
50 100 150 200 250 300  
0
50 100 150 200 250 300  
SUPPLY VOLTAGE (V)  
TIME (µs)  
TIME (µs)  
Enable Current Threshold  
vs. Temperature  
Enable Voltage Threshold  
vs. Temperature  
Output Impedance  
1000  
100  
10  
35  
30  
25  
20  
15  
10  
5
1.6  
1.4  
1.2  
1
CIN = 2.2µF  
COUT = 4.7µF  
CIN = 2.2µF  
COUT = 4.7µF  
IL = 100µA  
IL = 1mA  
1
ON  
VEN = 5V  
0.1  
0.8  
0.6  
0.4  
OFF  
0.01  
0.001  
VEN = 2V  
IL = 100mA  
0
-5  
-60 -30  
0
30 60 90 120 150  
-60 -30  
0
30 60 90 120 150  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
FREQUENCY (Hz)  
MIC5201  
6
July 1998  
MIC5201  
Micrel  
Ripple  
vs. Frequency  
Ripple  
vs. Frequency  
Ripple  
vs. Frequency  
100  
100  
80  
60  
40  
20  
0
100  
80  
60  
40  
20  
0
80  
60  
40  
20  
0
IL = 100µA  
IL = 1mA  
IL = 100mA  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
July 1998  
7
MIC5201  
MIC5201  
Micrel  
MIC5201BM  
Applications Information  
Figure 1 shows a basic fixed-voltage application with the  
unused enable input connected to V .  
VIN  
VOUT  
IN  
OUT  
ADJ  
GND  
R1  
R2  
EN  
3.3µF  
IN  
MIC5201-x.xBM  
MIC5201-x.xBS  
CADJ  
VIN  
VOUT  
1µF  
IN  
OUT  
EN  
Figure 3. Decreasing Ouput Noise  
Minimum Load  
GND  
TheMIC5201willremainstableandinregulationwithno load  
unlike many other voltage regulators. This is especially  
important in CMOS RAM keep-alive applications.  
Figure 1. Fixed Application  
Adjustable regulators require two resistors to set the output  
voltage. See Figure 2.  
Dual-Supply Systems  
MIC5201BM  
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  
VIN  
VOUT  
IN  
OUT  
ADJ  
GND  
R1  
R2  
EN  
3.3µF  
Layout  
R2  
R1  
V
= 1.242V 1+  
OUT  
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 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  
θ
JA  
FR4  
160° C/W  
120° C/W  
Ceramic  
Output Capacitors  
Multilayerboardshavingagroundplane,widetracesnearthe  
pads, and large supply bus lines provide better thermal  
conductivity.  
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 tanta-  
lums 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.  
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 dissi-  
pate 440mW. These power levels are equivalent to a die  
temperature of 125°C, the recommended maximum tem-  
perature 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.  
ForMIC5201-x.xBS(SOT-223package)heatsinkcharacter-  
istics, 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.  
50 mil  
Noise Reduction Capacitors  
245 mil  
150 mil  
On adjustable devices, a capacitor from ADJ to GND will  
decrease high-frequency noise on the output. See Figure 3.  
30 mil  
50 mil  
Figure 4. Min. Recommended SO-8 PCB Pads Size  
MIC5201  
8
July 1998  
MIC5201  
Micrel  
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  
45°  
0.0098 (0.249)  
0.0040 (0.102)  
0.010 (0.25)  
0.007 (0.18)  
0°–8°  
0.197 (5.0)  
0.189 (4.8)  
0.050 (1.27)  
0.016 (0.40)  
SEATING  
PLANE  
0.064 (1.63)  
0.045 (1.14)  
0.244 (6.20)  
0.228 (5.79)  
8-Pin SOIC (M)  
3.15 (0.124)  
2.90 (0.114)  
C
L
7.49 (0.295)  
6.71 (0.264)  
3.71 (0.146)  
3.30 (0.130)  
C
L
2.41 (0.095)  
2.21 (0.087)  
1.04 (0.041)  
0.85 (0.033)  
4.7 (0.185)  
4.5 (0.177)  
DIMENSIONS:  
MM (INCH)  
1.70 (0.067)  
1.52 (0.060)  
16°  
10°  
6.70 (0.264)  
6.30 (0.248)  
0.10 (0.004)  
0.038 (0.015)  
10°  
MAX  
0.02 (0.0008)  
0.25 (0.010)  
0.84 (0.033)  
0.64 (0.025)  
0.91 (0.036) MIN  
SOT-223 (S)  
July 1998  
9
MIC5201  
MIC5201  
Micrel  
MIC5201  
10  
July 1998  
MIC5201  
Micrel  
July 1998  
11  
MIC5201  
MIC5201  
Micrel  
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA  
TEL + 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.  
© 1998 Micrel Incorporated  
MIC5201  
12  
July 1998  

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