D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
MIC5202
Micrel
MIC5202
Dual 100mA Low-Dropout Regulator
General Description
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
IN
if un-
needed. When disabled, power consumption drops nearly
to zero. The ground current of the MIC5202 increases only
slightly in dropout, further prolonging battery life. Key MIC5202
features include protection against reversed battery, current
limiting, and over-temperature shutdown.
The MIC5202 is available in several fixed voltages. Other
options are available; contact Micrel for details.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
Battery Powered Equipment
PCMCIA V
CC
and V
PP
Regulation/Switching
Bar Code Scanners
SMPS Post-Regulator/ DC to DC Modules
High Efficiency Linear Power Supplies
Applications
Ordering Information
Part Number
Standard
MIC5202-3.0BM
MIC5202-3.3BM
MIC5202-4.8BM
MIC5202-5.0BM
Pb-Free
MIC5202-3.0YM
MIC5202-3.3YM
MIC5202-4.8YM
MIC5202-5.0YM
3.0
3.3
4.85
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
Volts
Accuracy
Temperature Range
Package
* Junction Temperature
Other voltages are available; contact Micrel for details.
Typical Application
MIC5202-3.
3
Output A
Enable A
Output B
Pin Configuration
VOUT (A)
GROUND
VOUT (B)
GROUND
VIN (A)
ENABLE (A
)
VIN (B)
ENABLE (B
)
1µ (x2)
Enable B
MIC5202-xxBM
Both GROUND pins must be tied to
the same potential. V
IN
(A) and V
IN
(B) may run
from separate supplies.
ENABLE pins may be tied directly to V
IN
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.
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
θ
JA
........................................................................See Note 1
Recommended Operating Conditions
Input Voltage ................................................................2.5V to 26V
Operating Junction Temperature Range.............. –40°C to +125°C
ENABLE Input Voltage ......................................................0V to V
IN
Electrical Characteristics
Limits in standard typeface are for T
J
= 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, V
IN
= V
OUT
+ 1V, I
L
= 1mA, C
L
= 10µF, and V
CONTROL
≥ 2.0V.
Symbol
V
O
ΔV
O
ppm/°C
ΔT
ΔV
O
V
O
ΔV
O
V
O
V
IN
– V
O
Parameter
Output Voltage
Output Voltage
Temperature Coef.
Line Regulation
Load Regulation
Dropout Voltage
(Note 4)
V
IN
= V
OUT
+ 1 V to 26V
I
L
= 0.1mA to 100mA (Note 3)
I
L
= 100µA
I
L
= 20mA
I
L
= 30mA
I
L
= 50mA
I
L
= 100mA
V
CONTROL
≤ 0.7V (Shutdown)
V
CONTROL
≥ 2.0V, I
L
= 100µA
I
L
= 20mA
I
L
= 30mA
I
L
= 50mA
I
L
= 100mA
V
IN
= 0.5V less specified V
OUT
, I
L
= 100µA
(Note 5)
V
OUT
= 0V
(Note 6)
0.004
0.04
17
130
150
180
225
0.01
170
270
330
500
1200
75
270
280
0.05
100
330
0.10
0.40
0.16
0.30
%
%
mV
Condition
Variation from specified V
OUT
Accuracy
(Note 2)
Min
–1
–2
40
Typ
Max
1
2
150
Units
%
350
µA
µA
I
Q
I
GND
Quiescent Current
Ground Pin Current
1500
dB
µA
mA
%/W
µV
PSRR
I
GNDDO
I
LIMIT
ΔV
O
ΔP
D
e
n
Ripple Rejection
Ground Pin
Current at Dropout
Current Limit
Thermal Regulation
Output Noise
Control Input
V
IL
I
IL
IH
Input Voltage Level
Logic Low
Logic High
Control Input Current
OFF
ON
V
IL
≤ 0.7V
V
IH
≥ 2.0V
0.7
2.0
0.01
8
V
µA
50
MIC5202
2
March 2006
MIC5202
Note 1:
Micrel
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
J(MAX)
the junction-to-ambient thermal resistance,
θ
JA
, and the ambient tem-
perature, T
A
. The maximum allowable power dissipation at any ambient temperature is calculated using: P
(MAX)
= (T
J(MAX)
– T
A
)
/
θ
JA.
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.
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.
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 V
IN
= 26V for t = 10ms, and is measured
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Typical Characteristics
(Each Regulator—2 Regulators/Package)
Dropout Voltage
vs. Output Current
250
200
150
0.2
100
50
0
0.01
0.1
I
L
= 1mA
1.5
1.0
0.5
0.0
0
I
L
= 100µA, 1mA
0.4
Dropout Voltage
vs. Temperature
3.5
3.0
0.3
I
L
= 100mA
2.5
2.0
Dropout
Characteristics
I
L
= 100mA
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
0.0
-60 -30
0 30 60 90 120 150
TEMPERATURE (°C)
2
4
6
8
INPUT VOLTAGE (V)
10
Ground Current
vs. Output Current
10
1.6
1.4
1.2
1.0
1
0.8
0.6
0.4
0.2
0.1
0.01
0.1
1
10
OUTPUT CURRENT (mA)
100
0.0
0
Ground Current
vs. Supply Voltage
3.5
3.0
I
L
= 100mA
2.5
2.0
1.5
1.0
I
L
= 1mA
0.5
10
0.0
0.0
Output Voltage
vs. Output Current
C
IN
= 2.2µF
C
OUT
= 4.7µF
2
4
6
8
SUPPLY VOLTAGE (V)
0.1
0.2
OUTPUT CURRENT (A)
0.3
March 2006
3
MIC5202
MIC5202
Micrel
Ground Current
vs. Temperature
0.30
I
LOAD
= 100µA
C
IN
= 2.2µF
C
OUT
= 4.7µF
1.5
1.4
1.3
1.2
0.20
1.1
0.15
-60 -30
1.0
-50
Ground Current
vs. Temperature
100
I
LOAD
= 100mA
C
IN
= 2.2µF
C
OUT
= 4.7µF
50
0
Thermal Regulation
(3.3V Version)
0.25
C
L
= 4.7 µF
-50
200
100
0
0 30 60 90 120 150
TEMPERATURE (°C)
0
50
100
TEMPERATURE (°C)
150
-100
-5
0
5
10 15 20 25 30 35
TIME (ms)
Output Voltage vs. Temp.
(3.3V Version)
3.6
3.5
3.4
3.3
3.2
3.1
3 DEVICES:
HI / AVG / LO
CURVES APPLICABLE
AT 100µA AND 100mA
0 30 60 90 120 150
TEMPERATURE (°C)
C
IN
= 2.2µF
C
OUT
= 4.7µF
Output Current
vs. Temperature
300
280
260
240
220
V
OUT
= 3.3V
200
180
V
OUT
= 0V
160
(SHORT CIRCUIT)
140
120
100
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Minimum Input Voltage
vs. Temperature
3.30
3.29
3.28
C
IN
= 2.2µF
3.27
C
OUT
= 4.7µF
I
LOAD
= 1mA
3.26
3.25
3.24
3.23
3.22
3.21
3.20
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
3.0
-60 -30
Short Circuit Current
vs. Input Voltage
300
250
200
150
100
50
0
1
C
IN
= 2.2µF
C
OUT
= 4.7µF
V
OUT
= 3.3V
2
3
4
5
INPUT VOLTAGE (V)
6
7
Load Transient
20
10
0
-10
-20
300
-30
200
100
0
-2
0
2
4
6
TIME (ms)
8
10
Load Transient
20
10
0
C
L
= 4.7µF
-10
-20
300
-30
200
100
0
-10
0
C
L
= 47µF
10
20
TIME (ms)
30
40
Supply Current vs. Supply
Voltage (3.3V Version)
120
100
80
60
40
20
0
0 1 2 3 4 5 6 7 8 9 10
SUPPLY VOLTAGE (V)
R
L
= 33Ω
10
5
0
-5
-10
8
6
4
2
-0.2
Line Transient
15
C
L
= 1 µF
I
L
= 1mA
10
5
0
-5
8
6
4
0
0.2
0.4
TIME (ms)
0.6
0.8
2
-0.1
0
Line Transient
C
L
= 10 µF
I
L
= 1mA
0.1 0.2 0.3 0.4 0.5 0.6
TIME (ms)
MIC5202
4
March 2006
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
