MIC5201-5.0YS [MICREL]
200mA Low-Dropout Regulator; 200毫安低压差稳压器型号: | MIC5201-5.0YS |
厂家: | MICREL SEMICONDUCTOR |
描述: | 200mA Low-Dropout Regulator |
文件: | 总9页 (文件大小:1003K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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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