MIC5202-5.0YM [MICREL]
Dual 100mA Low-Dropout Regulator; 双路100mA时的低压差稳压器
| 型号： | MIC5202-5.0YM |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | Dual 100mA Low-Dropout Regulator |
| 文件： | 总7页 (文件大小：131K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5202
Dual 100mA Low-Dropout Regulator
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
signal. This ENABLE control my be tied directly to V if un-
needed. When disabled, power consumption dropsINnearly
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.
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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
Logic-controlled electronic shutdown
Available in SO-8 package
Applications
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 VCC and VPP Regulation/Switching
Bar Code Scanners
SMPS Post-Regulator/ DC to DC Modules
High Efficiency Linear Power Supplies
Ordering Information
Part Number
Volts
Accuracy
Temperature Range
Package
Standard
Pb-Free
MIC5202-3.0BM MIC5202-3.0YM
MIC5202-3.3BM MIC5202-3.3YM
MIC5202-4.8BM MIC5202-4.8YM
MIC5202-5.0BM MIC5202-5.0YM
3.0
3.3
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
4.85
5.0
* Junction Temperature
Other voltages are available; contact Micrel for details.
Typical Application
Pin Configuration
V
(A)
V
(A)
OUT
GROUND
(B)
IN
ENABLE ()A
(B)
MIC5202-33.
Output A
Output B
V
V
OUT
GROUND
IN
ENABLE ()B
EnableA
EnableB
MIC5202-xxBM
1µ (x2)
Both GROUND pins must be tied to
the same potential. V (A) and VIN (B) may run
from separate supplieIsN.
ENABLE pins may be tied directly to VIN
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2006
1
MIC5202
MIC5202
Micrel
Absolute Maximum Ratings
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.
Recommended Operating Conditions
Input Voltage ................................................................2.5V to 26V
Operating Junction Temperature Range.............. –40°C to +125°C
ENABLE Input Voltage ......................................................0V to VIN
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. Speci-
fications 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
%
ΔVO
ppm/°C
ΔT
ΔVO
VO
ΔVO
VO
Output Voltage
(Note 2)
40
150
Temperature Coef.
Line Regulation
VIN = VOUT + 1 V to 26V
0.004
0.04
0.10
0.40
0.16
0.30
%
%
Load Regulation
IL = 0.1mA to 100mA (Note 3)
VIN – VO
Dropout Voltage
(Note 4)
IL = 100µA
IL = 20mA
IL = 30mA
IL = 50mA
IL = 100mA
17
mV
130
150
180
225
350
IQ
IGND
Quiescent Current
Ground Pin Current
VCONTROL ≤ 0.7V (Shutdown)
0.01
µA
µA
VCONTROL ≥ 2.0V, IL = 100µA
IL = 20mA
170
270
IL = 30mA
330
IL = 50mA
500
IL = 100mA
1200
1500
330
PSRR
IGNDDO
Ripple Rejection
Ground Pin
Current at Dropout
75
270
dB
µA
VIN = 0.5V less specified VOUT, IL = 100µA
(Note 5)
ILIMIT
ΔVO
ΔPD
Current Limit
Thermal Regulation
VOUT = 0V
(Note 6)
280
0.05
mA
%/W
en
Output Noise
100
µV
Control Input
Input Voltage Level
Logic Low
Logic High
VIL
OFF
ON
VIL ≤ 0.7V
VIH ≥ 2.0V
0.7
50
V
2.0
IIL
Control Input Current
0.01
8
µA
IH
MIC5202
2
March 2006
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 tem-
/ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regJu(MlaAXto) r wAill
go into thermal shutdown. The junction to ambient thermal resistance of the MIC5202BM is 160°C/W mounted on a PC
board.
perature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P(MAX) = (T
– T )
Note 2:
Note 3:
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature
range.
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regula-
tion 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.
Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, ex-
cluding load or line regulation effects. Specifications are for a 100mA load pulse at VIN = 26V for t = 10ms, and is measured
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
C IN = 2.2µF
C OUT = 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)
March 2006
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MIC5202
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
C IN = 2.2µF
C OUT = 4.7µF
ILOAD = 100mA
C IN = 2.2µF
C OUT = 4.7µF
0.25
0.20
0.15
0
C L = 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
C IN = 2.2µF
C OUT = 4.7µF
C IN = 2.2µF
C OUT = 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
C L = 47µF
300
250
200
150
100
50
20
10
20
10
0
0
-10
-20
3-030
-10
-20
3-030
C L = 4.7µF
C IN = 2.2µF
C OUT = 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
C L = 1 µF
IL = 1mA
C L = 10 µF
IL = 1mA
0
-5
0
-108
-58
6
4
2
6
4
2
R L = 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)
MIC5202
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March 2006
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
C L = 4.7 µF
IL = 1mA
C L = 4.7 µF
IL = 100mA
-14
-14
R L = 66Ω
2
0
2
0
-2
-2
0
1
2
3
4
5
6
7
-50
0
50 100 150 200 250 300
TIME (µs)
-50
0
50 100 150 200 250 300
TIME (µs)
SUPPLY VOLTAGE (V)
Enable Current Threshold
vs. Temperature
Enable Voltage Threshold
vs. Temperature
Output Impedance
IL = 100µA
1000
100
10
35
30
25
20
15
10
5
1.6
1.4
1.2
1
C IN = 2.2µF
C OUT = 4.7µF
C IN = 2.2µF
C OUT = 4.7µF
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)
March 2006
5
MIC5202
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.
A1µFcapacitorisrecommendedbetweentheMIC5202output
andgroundtopreventoscillationsduetoinstability. Largerval-
uesservetoimprovetheregulator’stransientresponse. Most
types of tantalum or aluminum electrolytics will be adequate;
film types will work, but are costly and therefore not recom-
mended. Many aluminum electrolytics have electrolytes that
freeze at about –30°C, so solid tantalums 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,
minimum trace widths, and a FR4 material board.
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
input to ground if there is more than 10 inches of wire be-
tween the input and the AC filter capacitor or if a battery is
used as the supply.
Part II. Nominal Power Dissipation and Die Tempera-
ture
The MIC5202-xxBM at a 25°C ambient temperature will oper-
ate reliably at up to 625mW power dissipation when mounted
in the “worst case” manner described above. At an ambient
temperatureof55°C, thedevicemaysafelydissipate440mW.
These power levels are equivalent to a die temperature 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
deviceandallowsoperation.TheENABLEpinrequiresasmall
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
The MIC5202 will remain stable and in regulation with no
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
BothMIC5202GROUNDpinsmustbetiedtothesameground
potential. Isolation between the two halfs allows connecting
the two VIN pins to different supplies.
30 mil
50 mil
Minimum recommended board pad size, SO-8.
MIC5202
6
March 2006
MIC5202
Micrel
Package Information
8-Pin SOP (M)
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.
© 2005 Micrel Incorporated
March 2006
7
MIC5202
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