MIC5200-5.0BM [MICREL]
100mA Low-Dropout Voltage Regulator Preliminary Information; 100mA时的低压差稳压器的初步信息
| 型号： | MIC5200-5.0BM |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 100mA Low-Dropout Voltage Regulator Preliminary Information |
| 文件： | 总6页 (文件大小：90K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5200
100mA Low-Dropout Voltage Regulator
Preliminary Information
Features
General Description
The MIC5200 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. Designed especially for
hand-heldbatterypowereddevices,theMIC5200isswitched
by a CMOS or TTL compatible logic signal. The ENABLE
controlmaybetieddirectlytoVIN ifunneeded.Whendisabled,
power consumption drops nearly to zero. The ground current
of the MIC5200 increases only slightly in dropout, further
prolongingbatterylife. KeyMIC5200featuresincludeprotec-
tion against reversed battery, current limiting, and over-
temperature shutdown.
• High output voltage accuracy
• Variety of output voltages
• Guaranteed 100mA output
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Zero OFF mode current
• Logic-controlled electronic shutdown
• Available in 8-lead SOIC, MM8™ 8-lead MSOP,
and SOT-223 packages
Applications
• Cellular Telephones
• Laptop, Notebook, and Palmtop Computers
• Battery Powered Equipment
3
The MIC5200 is available in several fixed voltages and
accuracyconfigurations. Otheroptionsareavailable;contact
Micrel for details.
• PCMCIA VCC and VPP Regulation/Switching
• Bar Code Scanners
• SMPS Post-Regulator/ DC to DC Modules
• High Efficiency Linear Power Supplies
Ordering Information
Part Number
Voltage
3.0
Accuracy Junction Temp. Range*
Package
SO-8
MIC5200-3.0BM
MIC5200-3.3BM
MIC5200-4.8BM
MIC5200-5.0BM
MIC5200-3.3BMM
MIC5200-5.0BMM
MIC5200-3.0BS
MIC5200-3.3BS
MIC5200-4.8BS
MIC5200-5.0BS
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
–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
–40°C to +125°C
–40°C to +125°C
3.3
SO-8
4.85
5.0
SO-8
SO-8
3.3V
5.0V
3.0
MSOP-8
MSOP-8
SOT-223
SOT-223
SOT-223
SOT-223
3.3
4.85
5.0
Other voltages available. Contact Micrel for details.
Typical Application
MIC5200-3.3
Output
1µF
Enable
3-123
July 1998
MIC5200
Micrel
Pin Configuration
OUT
OUT
IN
IN
NC
EN
NC
GND
MIC5200-x.xBM
(SO-8)
MIC5200-x.xBMM
(MSOP-8)
1
2
3
IN GND OUT
MIC5200-x.xBS
(SOT-223)
EN may be tied directly to VIN
Pin Description
Pin Number
SOT-223
Pin Number
SO-8, MSOP-8
Pin Name
Pin Function
3
2, TAB
1
1, 2
3, 6
OUT
NC
Output: Pins 1 and 2 must be externally connected together.
(not internally connected): Connect to ground plane for lowest thermal
resistance.
4
5
GND
EN
Ground: Ground pin and TAB are internally connected.
Enable/Shutdown (Input): TTL compatible input. High = enabled;
low = shutdown.
7, 8
IN
Supply Input: Pins 7 and 8 must be extenally connected together.
Absolute Maximum Ratings
Recommended Operating Conditions
Input Voltage ............................................................... 2.5V to 26V
Operating Junction Temperature Range............. –40°C to +125°C
Enable Input Voltage.................................................... –20V to VIN
Power Dissipation ............................................... Internally Limited
Lead Temperature (soldering, 5 sec.) .................................. 260°C
Operating Junction Temperature Range............. –40°C to +125°C
Input Supply Voltage ................................................ –20V to +60V
Enable Input Voltage................................................ –20V to +60V
Thermal Characteristics
SOT-223 (θJC)..................................................................... 15°C/W
SO-8 (θJA) ..................................................................... See Note 1
Absolute Maximum Ratings indicate limits beyond which damage
to the device may occur. Electrical specifications do not apply when
operating the device beyond its specified Operating Ratings.
July 1998
3-124
MIC5200
Micrel
Electrical Characteristics
Limits in standard typeface are for TJ = 25°C and limits in boldface apply over the junction temperature range of –40°C to +125°C.
Unless otherwise specified, VIN = VOUT + 1V, IL = 1mA, CL = 3.3µF, and VENABLE ≥ 2.0V
Symbol
Parameter
Conditions
Min Typical Max
Units
VO
Output Voltage
Accuracy
Variation from specified VOUT
–1
–2
1
2
%
∆VO
∆T
Output Voltage
Temperature Coef.
(Note 2)
40
150 ppm/°C
∆VO
VIN
Line Regulation
Load Regulation
VIN = VOUT + 1 V to 26V
IL = 0.1mA to 100mA (Note 3)
0.004
0.04
0.10
0.40
%
%
∆VO
0.16
VOUT
0.30
VIN – VO
Dropout Voltage
(Note 4)
IL = 100µA
IL = 20mA
IL = 30mA
IL = 50mA
IL = 100mA
17
mV
130
150
190
230
350
IGND
IGND
Quiescent Current
Ground Pin Current
V
ENABLE ≤ 0.7V (Shutdown)
ENABLE ≥ 2.0V, IL = 100µA
0.01
10
µA
µA
V
130
270
330
500
1000
3
IL = 20mA
IL = 30mA
IL = 50mA
IL = 100mA
350
1500
330
PSRR
Ripple Rejection
70
dB
IGNDDO
Ground Pin
VIN = 0.5V less than specified VOUT
270
µA
Current at Dropout
IL = 100µA (Note 5)
ILIMIT
Current Limit
VOUT = 0V
(Note 6)
100
250
mA
∆VO
∆PD
Thermal Regulation
0.05
%/W
en
Output Noise
100
µV
ENABLE Input
Input Voltage Level
VIL
Logic Low
Logic High
OFF
ON
0.7
V
2.0
IIL
IIH
ENABLE Input Current
V
V
IL ≤ 0.7V
IH ≥ 2.0V
0.01
15
1
50
µA
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, TJ (MAX), the junction-to-ambient thermal resistance, θJA, and the ambient
temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P(MAX)
=
(TJ(MAX) – TA) ÷ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the
regulator will go into thermal shutdown. The θJC of the MIC5200-xxBS is 15°C/W and θJA for the MIC5200BM is 160°C/W
mounted on a PC board (see “Thermal Considerations” section for further details).
Note 2:
Note 3:
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Regulationismeasuredatconstantjunctiontemperatureusinglowdutycyclepulsetesting. Partsaretestedforloadregulation
in the load range from 0.1mA to 100mA. Changes in output voltage due to heating effects are covered by the thermal regulation
specification.
Note 4:
Note 5:
Note 6:
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.
Thermalregulationisdefinedasthechangeinoutputvoltageatatimetafterachangeinpowerdissipationisapplied, excluding
load or line regulation effects. Specifications are for a 100mA load pulse at VIN = 26V for t = 10ms.
3-125
July 1998
MIC5200
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
3-126
MIC5200
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
-10
0
10
20
30
40
INPUT VOLTAGE (V)
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
3
-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)
3-127
July 1998
MIC5200
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)
Applications Information
Thermal Considerations
Part I. Layout
External Capacitors
The MIC5200-xxBM (8-pin surface mount package) has the
following thermal characteristics when mounted on a single
layer copper-clad printed circuit board.
A 1µF capacitor is recommended between the MIC5200
output and ground to prevent oscillations due to instability.
Larger values serve to improve the regulator's transient re-
sponse. Most types of tantalum or aluminum electrolytics will
be adequate; film types will work, but are costly and therefore
notrecommended.Manyaluminumelectrolyticshaveelectro-
lytes that freeze at about –30°C, so solid tantalum capacitors
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.
PC Board
Dielectric
FR4
θJA
160°C/W
120°C/W
Ceramic
Multi-layer boards having a ground plane, wide traces near
the pads, and large supply bus lines provide better thermal
conductivity.
The"worstcase"valueof160°C/Wassumesnogroundplane,
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
1 mA. A 1µF capacitor should be placed from the MIC5200
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.
minimum trace widths, and a FR4 material board.
Part II. Nominal Power Dissipation and Die Temperature
The MIC5200-xxBM 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 dissipate
440mW. These power levels are equivalent to a die tempera-
ture of 125°C, the recommended maximum temperature for
non-military grade silicon integrated circuits.
The MIC5200 will remain stable and in regulation with no load
in addition to the internal voltage divider, unlike many other
voltageregulators. ThisisespeciallyimportantinCMOSRAM
keep-alive applications.
For MIC5200-xxBS (SOT-223 package) heat sink character-
istics, please refer to Micrel Application Hint 17, “Calculating
P.C. Board Heat Sink Area for Surface Mount Packages”.
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.
50 mil
ENABLE Input
The MIC5200 features nearly zero OFF mode current. When
the ENABLE input is held below 0.7V, all internal circuitry is
powered off. Pulling this pin high (over 2.0V) re-enables the
device and allows operation. The ENABLE pin requires a
small amount of current, typically 15µA. While the logic
threshold is TTL/CMOS compatible, ENABLE may be pulled
as high as 30V, independent of the voltage on VIN.
245 mil
150 mil
30 mil
50 mil
Minimum recommended board pad size, SO-8.
July 1998
3-128
相关型号：
MIC5200-5.0YSTR
5V FIXED POSITIVE LDO REGULATOR, 0.35V DROPOUT, PDSO4, LEAD FREE, SOT-223, 3 PIN
MICROCHIP
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