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MIC5201-3.3YMTR [MICROCHIP]

3.3V FIXED POSITIVE LDO REGULATOR, 0.4V DROPOUT, PDSO8, LEAD FREE, SOIC-8;
MIC5201-3.3YMTR
型号： MIC5201-3.3YMTR
厂家： MICROCHIP    MICROCHIP
描述：

3.3V FIXED POSITIVE LDO REGULATOR, 0.4V DROPOUT, PDSO8, LEAD FREE, SOIC-8

光电二极管
文件： 总9页 (文件大小：1003K)
中文：  中文翻译
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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.  
• 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  
Standard  
MIC5201BM  
PbFree  
Voltage  
Adj.  
Junction Temp.*  
–40ºC to +125ºC  
–40ºC to +125ºC  
–40ºC to +125ºC  
–40ºC to +125ºC  
–40ºC to +125ºC  
–40ºC to +125ºC  
–40ºC to +125ºC  
–40ºC to +125ºC  
Package  
SO-8  
SO-8  
SO-8  
SO-8  
SOT-223  
SOT-223  
SOT-223  
SOT-223  
MIC5201YM  
MIC5201-3.0BM  
MIC5201-3.3BM  
MIC5201-5.0BM  
MIC5201-3.0BS  
MIC5201-3.3BS  
MIC5201-4.8BS  
MIC5201-5.0BS  
MIC5201-3.0YM  
MIC5201-3.3YM  
MIC5201-5.0YM  
MIC5201-3.0YS  
MIC5201-3.3YS  
MIC5201-4.8YS  
MIC5201-5.0YS  
3.0V  
3.3V  
5.0V  
3.0V  
3.3V  
4.8V  
5.0V  
Other voltages available. Contact Micrel for details.  
* Junction Temperature.  
Typical Application  
ENABLE  
MIC5201-3.3  
IN OUT  
EN  
SHUTDOWN  
VOUT  
3.3V  
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
2
3
IN  
GND OUT  
MIC5201-x.xBS  
SOT-223  
1
2
3
4
8
7
6
5
OUT  
NC  
GND  
NC  
IN  
1
2
3
4
8
7
6
5
OUT  
ADJ  
GND  
NC  
IN  
Fixed  
NC  
NC  
EN  
NC  
NC  
EN  
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  
EN  
Enable Input Voltage (V ) Fixed ................. –20V to +60V  
Enable Input Voltage (V ) .................................. 0V to V  
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
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  
Typ  
Max  
Units  
VO  
Output Voltage Accuracy  
Variation from specified VOUT  
–1  
1
%
–2  
2
%
∆VO/∆T  
∆VO/VO  
Output Voltage Temperature Coef.  
Line Regulation, Fixed  
Note 2  
VIN = VOUT + 1V to 26V  
40  
0.004  
150 ppm/°C  
0.20  
%
0.40  
%
∆VO/VO  
∆VO/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  
%
VIN – VO  
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  
µA  
µA  
µA  
µA  
µA  
270  
400  
500  
1000  
2000  
3000  
PSRR  
Ripple Rejection  
75  
dB  
IGNDDO  
Ground Pin Current at Dropout  
VIN = 0.5V less than specified VOUT  
,
270  
330  
µA  
IL = 100µA, Note 5  
ILIMIT  
∆VO/∆PD  
en  
Current Limit  
Thermal Regulation  
Output Noise  
VOUT = 0V  
Note 6  
280  
0.05  
100  
500  
mA  
%/W  
µV  
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
µA  
µA  
2.0  
V
V
IL ≤ 0.7V  
IH ≤ 2.0V  
0.01  
15  
1
50  
IIH  
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  
JA A  
J(max)  
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  
June 2005  
3
MIC5201  
MIC5201  
Micrel, Inc.  
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  
IN  
VOUT  
COUT  
VIN  
R1  
R2  
ADJ  
Bandgap  
Ref.  
EN  
Current Limit  
Thermal Shutdown  
MIC5201BM [adj.]  
GND  
Adjustable Regulator  
MIC5201  
4
June 2005  
MIC5201  
Micrel, Inc.  
Typical Characteristics  
Dropout  
Dropout Voltage  
vs. Temperature  
Dropout Voltage  
Characteristics  
vs. Output Current  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0.0  
0.4  
0.3  
0.2  
0.1  
0.0  
250  
200  
150  
100  
50  
IL = 100mA  
IL = 100mA  
IL = 100µA,1mA  
IL = 1mA  
0
0
2
4
6
8
10  
-60 -30  
0
30 60 90 120 150  
0.01 0.1  
1
10  
100 1000  
INPUT VOLTAGE (V)  
TEMPERATURE (°C)  
OUTPUT CURRENT (mA)  
Output Voltage  
Ground Current  
Ground Current  
vs. Output Current  
vs. Output Current  
vs. Supply Voltage  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0.0  
10  
1
1.6  
1.4  
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
0.0  
CIN = 2.2µF  
IL = 100mA  
COUT = 4.7µF  
IL = 1mA  
0.1  
0.0  
0.1  
0.2  
0.3  
0.01  
0.1  
1
10  
100  
0
2
4
6
8
10  
OUTPUT CURRENT (A)  
OUTPUT CURRENT (mA)  
SUPPLY VOLTAGE (V)  
Thermal Regulation  
(3.3V Version)  
Ground Current  
vs. Temperature  
Ground Current  
vs. Temperature  
100  
1.5  
1.4  
1.3  
1.2  
1.1  
1.0  
0.30  
0.25  
0.20  
0.15  
50  
0
ILOAD = 100mA  
ILOAD = 100µA  
CIN = 2.2µF  
CIN = 2.2µF  
COUT = 4.7µF  
COUT = 4.7µF  
CL = 4.7 µF  
2-050  
100  
0
-100  
-5  
0
5
10 15 20 25 30 35  
TIME (ms)  
-50  
0
50  
100  
150  
-60 -30  
0
30 60 90 120 150  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
Minimum Input Voltage  
vs. Temperature  
Output Current  
vs. Temperature  
Output Voltage vs. Temp.  
(3.3V Version)  
3.30  
300  
280  
260  
240  
220  
200  
180  
160  
140  
120  
100  
3.6  
3.5  
3.4  
3.3  
3.2  
3.1  
3.0  
3.29  
3.28  
3.27  
3.26  
3.25  
3.24  
3.23  
3.22  
3.21  
3.20  
CIN = 2.2µF  
CIN = 2.2µF  
COUT = 4.7µF  
COUT = 4.7µF  
ILOAD = 1mA  
VOUT = 3.3V  
3 DEVICES :  
HI / AVG / LO  
VOUT = 0V  
(SHORT CIRCUIT)  
CURVES APPLICABLE  
AT100µA AND100mA  
-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)  
June 2005  
5
MIC5201  
MIC5201  
Micrel, Inc.  
Short Circuit Current  
vs. Input Voltage  
Load Transient  
Load Transient  
20  
10  
0
-10  
-20  
3-030  
20  
10  
0
-10  
-20  
3-030  
300  
250  
200  
150  
100  
50  
CL = 47µF  
CL = 4.7µF  
CIN = 2.2µF  
200  
100  
0
200  
100  
0
COUT = 4.7µF  
VOUT = 3.3V  
0
-10  
0
10  
20  
30  
40  
-2  
0
2
4
6
8
10  
1
2
3
4
5
6
7
TIME (ms)  
TIME (ms)  
INPUT VOLTAGE (V)  
Supply Current vs. Supply  
Voltage (3.3V Version)  
Line Transient  
Line Transient  
15  
10  
5
10  
5
120  
100  
80  
60  
40  
20  
0
CL = 1 µF  
CL = 10 µF  
IL = 1mA  
IL = 1mA  
0
0
-5  
-58  
-180  
6
4
2
6
4
2
RL = 33Ω  
-0.1  
0
0.1 0.2 0.3 0.4 0.5 0.6  
TIME (ms)  
-0.2  
0
0.2  
0.4  
0.6  
0.8  
0
1 2 3 4 5 6 7 8 9 10  
SUPPLY VOLTAGE (V)  
TIME (ms)  
Enable Transient  
(3.3V Version)  
Supply Current vs. Supply  
Voltage (3.3V Version)  
Enable Transient  
(3.3V Version)  
5
4
60  
50  
40  
30  
20  
10  
0
5
4
3
3
2
2
CL = 4.7 µF  
CL = 4.7 µF  
1
1
IL = 100mA  
0
IL = 1mA  
0
-14  
-14  
2
0
RL = 66Ω  
2
0
-2  
-2  
-50  
0
50 100 150 200 250 300  
TIME(µs)  
0
1
2
3
4
5
6
7
-50  
0
50 100 150 200 250 300  
TIME(µs)  
SUPPLY VOLTAGE (V)  
Enable Voltage Threshold  
vs. Temperature  
Enable Current Threshold  
vs. Temperature  
Output Impedance  
1.6  
1000  
100  
10  
35  
30  
25  
20  
15  
10  
5
CIN = 2.2µF  
CIN = 2.2µF  
1.4  
1.2  
1
IL = 100µA  
COUT = 4.7µF  
COUT = 4.7µF  
IL = 1mA  
1
ON  
VE N = 5V  
0.8  
0.6  
0.4  
0.1  
OFF  
0.01  
0.001  
VE N = 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
June 2005  
MIC5201  
Micrel, Inc.  
Ripple  
Ripple  
Ripple  
vs. Frequency  
vs. Frequency  
vs. Frequency  
100  
80  
60  
40  
20  
0
100  
80  
60  
40  
20  
0
100  
80  
60  
40  
20  
0
IL = 100µA  
IL = 1mA  
IL = 100mA  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
June 2005  
7
MIC5201  
MIC5201  
Micrel, Inc.  
MIC5201BM  
Applications Information  
VIN  
VOUT  
IN  
EN  
OUT  
Figure 1 shows a basic fixed-voltage application with the  
R1  
R2  
ADJ  
unused enable input connected to V .  
GND  
3.3µF  
IN  
MIC5201-x.xBM  
CADJ  
MIC5201-x.xBS  
VIN  
VOUT  
IN  
EN  
OUT  
GND  
Figure 3. Decreasing Ouput Noise  
Minimum Load  
1µF  
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.  
Figure 1. Fixed Application  
Adjustable regulators require two resistors to set the output  
voltage. See Figure 2.  
Dual-Supply Systems  
MIC5201BM  
VIN  
VOUT  
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.  
IN  
EN  
OUT  
R1  
R2  
ADJ  
GND  
3.3µF  
Thermal Considerations Layout  
R2  
R1  
VOUT = 1.242V 1+  
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.  
Output Capacitors  
PC Board  
Dielectric  
θJA  
FR4  
160ºC/W  
120ºC/W  
Ceramic  
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.  
Multilayerboardshavingagroundplane,widetracesnearthe  
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 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  
On adjustable devices, a capacitor from ADJ to GND will  
245 mil  
150 mil  
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
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  
45°  
0.0098 (0.249)  
0.010 (0.25)  
0.007 (0.18)  
0.0040 (0.102)  
0°–8°  
0.197 (5.0)  
0.189 (4.8)  
0.050 (1.27)  
0.016 (0.40)  
SEATING  
0.064 (1.63)  
0.045 (1.14)  
PLANE  
0.244 (6.20)  
0.228 (5.79)  
8-Pin SOP (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)  
DIMENSIONS:  
MM (INCH)  
4.5 (0.177)  
1.70 (0.067)  
16°  
10°  
6.70 (0.264)  
6.30 (0.248)  
1.52 (0.060)  
0.10 (0.004)  
0.038 (0.015)  
10°  
0.02 (0.0008)  
0.25 (0.010)  
MAX  
0.84 (0.033)  
0.64 (0.025)  
0.91 (0.036) MIN  
SOT-223 (S)  
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  
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  

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