MIC5202-5.0BM [MICREL]
Dual 100mA Low-Dropout Voltage Regulator Preliminary Information; 双路100mA时的低压差稳压器的初步信息
| 型号： | MIC5202-5.0BM |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | Dual 100mA Low-Dropout Voltage Regulator Preliminary Information |
| 文件： | 总6页 (文件大小：88K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5202
Dual 100mA Low-Dropout Voltage Regulator
Preliminary Information
General Description
Features
The MIC5202 is a family of dual linear voltage regulators with
very low dropout voltage (typically 17mV at light loads and
210mV at 100mA), and very low ground current (1mA at
100mA output–each section), offering better than 1% initial
accuracy with a logic compatible ON/OFF switching input.
Designed especially for hand-held battery powered devices,
the MIC5202 is switched by a CMOS or TTL compatible logic
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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
Reverse-battery protection
Zero OFF mode current
signal. This ENABLE control my be tied directly to V if
IN
unneeded. When disabled, power consumption drops nearly
to zero. The ground current of the MIC5202 increases only
slightlyindropout,furtherprolongingbatterylife. KeyMIC5202
features include protection against reversed battery, current
limiting, and over-temperature shutdown.
Logic-controlled electronic shutdown
Available in SO-8 package
Applications
3
The MIC5202 is available in several fixed voltages. Other
options are available; contact Micrel for details.
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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
Pin Configuration
Part Number
Volts Accuracy Temperature Range* Package
V
(A)
MIC5202-3.0BM 3.0
MIC5202-3.3BM 3.3
MIC5202-4.8BM 4.85
MIC5202-5.0BM 5.0
1%
1%
1%
1%
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
SO-8
SO-8
SO-8
SO-8
V
(A)
OUT
GROUND
(B)
IN
ENABLE (A)
(B)
V
V
OUT
GROUND
IN
ENABLE (B)
MIC5202-xxBM
Both GROUND pins must be tied to
the same potential. VIN (A) and VIN (B) may run
from separate supplies.
* Junction Temperature
Other voltages are available; contact Micrel for details.
Typical Application
MIC5202-3.3
Output A
Output B
Enable A
Enable B
1µ (x2)
ENABLE pins may be tied directly to VIN
July 1998
3-135
MIC5202
Micrel
Absolute Maximum Ratings
Recommended Operating Conditions
Input Voltage ............................................................... 2.5V to 26V
Operating Junction Temperature Range............. –40°C to +125°C
ENABLE Input Voltage..................................................... 0V to VIN
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.
Power Dissipation ............................................... Internally Limited
Lead Temperature (Soldering, 5 seconds) .......................... 260°C
Operating Junction Temperature Range............. –40°C to +125°C
Input Supply Voltage ................................................ –20V to +60V
ENABLE Input Voltage............................................. –20V to +60V
SO-8 θJA ....................................................................... See Note 1
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.
Specifications are for each half of the (dual) MIC5202. Unless otherwise specified, VIN = VOUT + 1V, IL = 1mA, CL = 10µF, and VCONTROL
≥ 2.0V.
Symbol
Parameter
Condition
Min
Typ
Max
Units
VO
Output Voltage
Variation from specified VOUT
Accuracy
–1
–2
1
2
%
∆VO
∆T
Output Voltage
Temperature Coef.
(Note 2)
40
150 ppm/°C
∆VO
VO
Line Regulation
VIN = VOUT + 1 V to 26V
IL = 0.1mA to 100mA (Note 3)
0.004
0.04
0.10
0.40
%
%
∆VO
Load Regulation
0.16
VO
0.30
VIN – VO
Dropout Voltage
(Note 4)
IL = 100µA
IL = 20mA
IL = 30mA
IL = 50mA
IL = 100mA
17
mV
130
150
180
225
350
IQ
Quiescent Current
Ground Pin Current
V
CONTROL ≤ 0.7V (Shutdown)
0.01
µA
µA
IGND
V
CONTROL ≥ 2.0V, IL = 100µA
170
270
330
500
1200
IL = 20mA
IL = 30mA
IL = 50mA
IL = 100mA
1500
330
PSRR
Ripple Rejection
75
dB
IGNDDO
Ground Pin
VIN = 0.5V less specified VOUT, IL = 100µA
270
µA
Current at Dropout
(Note 5)
ILIMIT
Current Limit
VOUT = 0V
(Note 6)
280
mA
∆VO
∆PD
Thermal Regulation
0.05
%/W
en
Output Noise
100
µV
Control Input
Input Voltage Level
VIL
Logic Low
Logic High
OFF
ON
0.7
50
V
2.0
IIL
Control Input Current
VIL ≤ 0.7V
IH ≥ 2.0V
0.01
8
µA
V
IH
3-136
July 1998
MIC5202
Micrel
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 junction to ambient thermal resistance of the MIC5202BM is 160°C/W mounted
on a PC board.
Note 2:
Note 3:
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Regulationismeasuredatconstantjunctiontemperatureusinglowdutycyclepulsetesting. Partsaretestedforloadregulation
intheloadrangefrom0.1mAto100mA. Changesinoutputvoltageduetoheatingeffectsarecoveredbythethermalregulation
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, and is measured separately
for each section.
3
Typical Characteristics (Each Regulator—2 Regulators/Package)
Dropout Voltage
vs. Output Current
Dropout Voltage
vs. Temperature
Dropout
Characteristics
250
200
150
100
50
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
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)
July 1998
3-137
MIC5202
Micrel
Ground Current
vs. Temperature
Ground Current
vs. Temperature
Thermal Regulation
(3.3V Version)
0.30
1.5
1.4
1.3
1.2
1.1
1.0
100
50
ILOAD = 100µA
CIN = 2.2µF
COUT = 4.7µF
ILOAD = 100mA
CIN = 2.2µF
COUT = 4.7µF
0.25
0.20
0.15
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
280
260
240
220
200
180
160
140
120
100
3.30
3.29
3.28
3.27
3.26
3.25
3.24
3.23
3.22
3.21
3.20
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)
Short Circuit Current
vs. Input Voltage
Load Transient
Load Transient
300
250
200
150
100
50
20
10
20
10
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)
3-138
July 1998
MIC5202
Micrel
Supply Current vs. Supply
Voltage (3.3V Version)
Enable Transient
(3.3V Version)
Enable Transient
(3.3V Version)
60
5
4
5
4
50
40
30
20
10
0
3
2
1
0
3
2
1
0
CL = 4.7 µF
IL = 1mA
CL = 4.7 µF
IL = 100mA
-41
-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
3
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)
Ripple
vs. Frequency
Ripple
vs. Frequency
Ripple
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)
July 1998
3-139
MIC5202
Micrel
Applications Information
External Capacitors
Thermal Considerations
Part I. Layout
The MIC5202-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 MIC5202
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
haveelectrolytesthatfreezeatabout–30°C,sosolidtantalums
are recommended for operation below –25°C. The important
parametersofthecapacitorareaneffectiveseriesresistance
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 MIC5202
inputtogroundifthereismorethan10inchesofwirebetween
the input and the AC filter capacitor or if a battery is used as
the supply.
minimum trace widths, and a FR4 material board.
Part II. Nominal Power Dissipation and Die Temperature
The MIC5202-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.
ENABLE Input
The MIC5202 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. The two
portions of the MIC5202 may be enabled separately.
General Notes
TheMIC5202willremainstableandinregulationwithno load
in addition to the internal voltage divider, unlike many other
voltage regulators. This is especially important in CMOS
RAM keep-alive applications. Thermal shutdown is
independant on both halfs of the dual MIC5202, however an
over-temperature condition on one half might affect the other
because of proximity. 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
245 mil
150 mil
30 mil
50 mil
Both MIC5202 GROUND pins must be tied to the same
ground potential. Isolation between the two halfs allows
connecting the two VIN pins to different supplies.
Minimum recommended board pad size, SO-8.
3-140
July 1998
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