MIC5355/6
Dual 500mA µCap Low Dropout,
Micropower Linear Regulator
General Description
The MIC5355/6 is an advanced dual, micropower, low
dropout linear regulator. The MIC5355/6 provides low
quiescent current operation, using only 70μA with both
outputs enabled making it ideal for battery-powered
systems. In shutdown, the quiescent current drops to less
than 1µA. The MIC5355/6 provides two independently-
controlled high-performance 500mA LDOs with typical
dropout voltage of 350mV at rated load. In addition, the
MIC5355/6 is optimized to provide fast load and line
transient performance with low-ESR ceramic output
capacitors, requiring a minimum of only 2.2µF.
The MIC5356 also incorporates an active discharge
feature when the part is disabled that switches in a 30Ω
load to pull down the output of the regulator. The
MIC5355/6 is available in fixed output voltages in a
thermally-enhanced 8-pin ePad MSOP package or 8-pin
ePad 3mm x 3mm MLF
®
package.
Data sheets and support documentation can be found on
Micrel’s web site at
www.micrel.com.
Features
2.5V to 5.5V input voltage range
2% initial output accuracy
Wide output voltage range: 1.0V to 3.3V
Low quiescent current: 38µA per output
Very low quiescent current in shutdown: <1μA typical
µCap stable with 2.2µF ceramic capacitor
Low dropout voltage: 350mV at 500mA
Excellent load/line transient response
Independent logic controlled enable pins
Output discharge circuit: MIC5356
Current and thermal limit protection
Power 8-pin ePad MSOP package or 8-pin ePad 3mm
x 3mm MLF
®
package
Applications
Smart phones
GPS, PMP, DSC
Notebooks and desktops
Digital TV
Portable electronics
_________________________________________________________________________________________________________________________
Typical Application
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technology, 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
March 2012
M9999-031512-A
Micrel, Inc.
MIC5355/6
Ordering Information
Manufacturer Ordering
Part Number
MIC5355-SGYMME
MIC5355-S4YMME
MIC5355-SCYMME
MIC5355-G4YMME
MIC5355-JGYMME
MIC5356-SGYMME
MIC5356-S4YMME
MIC5356-SCYMME
MIC5356-G4YMME
MIC5356-JGYMME
MIC5356-MMYML
MIC5356-MGYML
Notes:
1.
2.
MIC5356 offers Auto-Discharge function.
Other voltage available. Contact Micrel for detail.
Part Number
(1)
Marking
Code
55SG
55S4
55SC
55G4
55JG
56SG
56S4
56SC
56G4
56JG
M3M
M3G
Voltage
(2)
Junction
Temperature
Range
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
Package
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad 3mm x 3mm MLF
8-Pin ePad 3mm x 3mm MLF
®
®
MIC5355-3.3/1.8YMME
MIC5355-3.3/1.2YMME
MIC5355-3.3/1.0YMME
MIC5355-1.8/1.2YMME
MIC5355-2.5/1.8YMME
MIC5356-3.3/1.8YMME
MIC5356-3.3/1.2YMME
MIC5356-3.3/1.0YMME
MIC5356-1.8/1.2YMME
MIC5356-2.5/1.8YMME
MI5356-2.8/2.8YML
MI5356-2.8/1.8YML
3.3V/1.8V
3.3V/1.2V
3.3V/1.0V
1.8V/1.2V
2.5V1.8V
3.3V/1.8V
3.3V/1.2V
3.3V/1.0V
1.8V/1.2V
2.5V/1.8V
2.8V/2.8V
2.8V/1.8V
Pin Configuration
8-Pin ePad MSOP (MME)
8-Pin ePad 3mm x 3mm MLF
®
(ML)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
ePad
Pin Name
VIN
GND
NC
EN2
EN1
NC
VOUT2
VOUT1
HSPAD
Pin Function
Supply Input.
Ground.
Not internally connected.
Enable Input LDO2. Active High Input. Logic High = On; Logic Low = Off; Do not leave floating.
Enable Input LDO1. Active High Input. Logic High = On; Logic Low = Off; Do not leave floating.
Not internally connected.
LDO2 Output.
LDO1 Output.
Heatsink pad. Connect to ground.
March 2012
2
M9999-031512-A
Micrel, Inc.
MIC5355/6
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ........................................ –0.3V to +6V
Enable Voltage (V
EN1,
V
EN2
). ....................–0.3V to V
IN
+0.3V
Power Dissipation (P
D
) ........................... Internally Limited
(3)
Lead Temperature (soldering, 10sec.)....................... 260°C
Junction Temperature (T
J
) ........................–40°C to +125°C
Storage Temperature (T
s
) .........................–65°C to +150°C
ESD Rating
(4)
................................................. ESD Sensitive
Operating Ratings
(2)
Supply Voltage (V
IN
)....................................... +2.5V to 5.5V
Enable Voltage (V
EN1,
V
EN2
). ................................... 0V to V
IN
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
8-Pin ePad MSOP (θ
JA
)..................................64.4°C/W
8-Pin ePad 3mm x 3mm MLF
®
(θ
JA
)..................61°C/W
Electrical Characteristics
(5)
V
IN
= V
EN1
= V
EN2
= V
OUT
+1V; higher of the two outputs; I
OUTLDO1
= I
OUTLDO2
= 100µA; C
OUT1
= C
OUT2
= 2.2 µF; T
J
= +25C,
bold
values indicate –40°C to +125°C, unless noted.
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
Dropout Voltage
Condition
Variation from nominal V
OUT
Variation from nominal V
OUT
V
IN
= V
OUT
+ 1V to 5.5V, I
OUT
= 100µA
I
OUT
= 100µA to 500mA
I
OUT
= 50mA
I
OUT
= 500mA
V
EN1
= High; V
EN2
= Low; I
OUT1
= 0mA
V
EN1
= Low; V
EN2
= High; I
OUT2
= 0mA
Ground Pin Current
V
EN1
= V
EN2
= High; I
OUT1
= I
OUT2
= 0mA
V
EN1
= High; V
EN2
= Low; I
OUT1
= 500mA
V
EN1
= Low; V
EN2
= High; I
OUT2
= 500mA
V
EN1
= V
EN2
= High; I
OUT1
= I
OUT2
= 500mA
Shutdown Current
Ripple Rejection
Current Limit
Output Voltage Noise
Auto-Discharge NFET
Resistance
Notes:
1.
2.
3.
4.
5.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
The maximum allowable power dissipation of any T
A
(ambient temperature) is P
D(MAX)
= (T
J(MAX)
T
A
) /
JA
. Exceeding the maximum allowable power
dissipation will result in excessive die temperature and the register will go into thermal shutdown.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
Specification for packaged product only.
Min.
2.0
3.0
Typ.
Max.
+2.0
+3.0
Units
%
%/V
%
mV
0.02
0.3
40
350
38
38
70
55
55
105
0.05
60
525
750
146
30
0.3
1
100
800
53
53
100
90
90
200
1
1050
µA
V
EN1
= V
EN2
0.2V
f = 1kHz; C
OUT
= 2.2µF; I
OUT
= 250mA
V
OUT
= 0V
C
OUT
= 2.2µF, 10Hz to 100kHz
MIC5356 only; V
EN1
= V
EN2
= 0V; V
IN
= 3.6V; I
OUT
=
3mA
µA
dB
mA
µV
RMS
Ω
March 2012
3
M9999-031512-A
Micrel, Inc.
MIC5355/6
Electrical Characteristics
(4)
V
IN
= V
EN1
= V
EN2
= V
OUT
+1V; higher of the two outputs; I
OUTLDO1
= I
OUTLDO2
= 100µA; C
OUT1
= C
OUT2
= 2.2 µF; T
J
= +25C,
bold
values indicate –40°C to +125°C, unless noted.
Parameter
Enable Inputs (EN1/EN2)
Enable Input Voltage
Enable Input Current
Turn-On Time
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
Condition
Logic Low
Logic High
V
IL
0.2V
V
IH
1.2V
Min.
Typ.
Max.
0.2
Units
1.2
0.01
0.01
50
1
1
125
V
µA
µs
March 2012
4
M9999-031512-A
Micrel, Inc.
MIC5355/6
Typical Characteristics
Power Supply Rejection Ratio
-80
-70
3
2.9
Output Voltage
vs. Input Voltage
2
Output Voltage
vs. Input Voltage
OUTPUT VOLTAGE (V)
-60
-50
250mA
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2
C
IN
= C
OUT
= 2.2μF
500mA
100μA
OUTPUT VOLTAGE (V)
1.9
100μA
dB
500mA
-40
-30
-20
-10
0
10
100
1000
10000
100000
V
EN
= V
IN
= 2.82V
V
OUT
= 1.8V
C
OUT
= 2.2µF
100µA
1.8
500mA
1.7
C
IN
= C
OUT
= 2.2μF
1.6
2.5
3
3.5
4
4.5
5
5.5
2.5
3
3.5
4
4.5
5
5.5
FREQUENCY (Hz)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
2.7
Output Voltage
vs. Output Current (V
OUT1
)
2
Output Voltage
vs. Output Current (V
OUT2
)
65
60
55
50
45
40
35
30
25
20
15
10
5
0
Ground Current vs.
Input Voltage (Single Output)
GROUND CURRENT
(μA)
OUTPUT VOLTAGE (V)
2.5
OUTPUT VOLTAGE (V)
2.6
1.9
500mA
1.8
NO LOAD
V
OUT2
= 1.8V
C
IN
= C
OUT
= 2.2μF
V
EN1
= GND, V
EN2
= V
IN
2.4
V
IN
= V
EN1
= 3.5V
V
OUT1
= 2.5V
C
IN
= C
OUT
= 2.2μF
2.2
0
100
200
300
400
500
1.7
V
IN
= V
EN2
= 3.5V
V
OUT2
= 1.8V
1.6
C
IN
= C
OUT
= 2.2μF
2.3
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
1.5
0
100
200
300
400
500
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
Ground Current vs. Input
Voltage (Dual Output)
120
Ground Current
vs. Output Current
120
Ground Current
vs. Temperature (Single Output)
70
65
500mA
60
55
50
45
40
35
30
25
20
15
10
5
0
-40
-20
0
20
40
GROUND CURRENT(μA)
105
90
75
60
45
30
15
0
2.5
3
3.5
4
4.5
5
5.5
V
OUT1
= 2.5V, V
OUT2
= 1.8V
C
IN
= C
OUT
= 2.2μF
V
EN1
= V
EN2
= V
IN
NO LOAD
500mA
GROUND CURRENT(μA)
105
90
75
60
45
30
15
0
0
50 100 150 200 250 300 350 400 450 500
V
IN
= 3.5V
C
IN
= C
OUT
= 2.2μF
DUAL OUTPUT
SINGLE OUTPUT
GROUND CURRENT (μA)
NO LOAD
V
OUT1
=2.5V
V
EN1
= V
IN
= 3V
V
EN2
= GND
C
IN
= C
OUT
= 2.2μF
60
80
100
120
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
March 2012
5
M9999-031512-A
嵌入式系统
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