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MIC5326
150mA Low Operating Current LDO
General Description
The MIC5326 is a low quiescent current, low dropout
regulator designed for optimal performance in a small
space. The MIC5326 is capable of sourcing 150mA of
output current while only consuming 24µA of operating
current. This high performance LDO offers low dropout,
fast transient response, good PSRR, and low output
voltage noise.
The MIC5326 is an ideal solution for battery operated
applications due to low operating current of 24μA and
extremely low dropout voltage of 85mV at 150mA.
Equipped with a TTL logic compatible enable pin, the
MIC5326 can be put into a zero-off-mode current state
drawing virtually no current when disabled.
Board space and component cost is minimized because
the MIC5326 operates with very small 1μF ceramic
capacitors, provides fixed output voltages, and is available
in the tiny 1.2mm x 1.6mm Thin MLF
®
package.
MIC5326 also features thermal shutdown and current limit
protection.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
•
•
•
•
•
•
•
•
150mA output current
Input voltage range: 2.3V to 5.5V
Low 24µA operating current
Low dropout voltage of 85mV @ 150mA
Fixed output voltage
Stable with 1μF ceramic capacitors
Thermal shutdown and current limit protection
Tiny 4-pin 1.2mm x 1.6mm Thin MLF
®
package
Applications
•
•
•
•
•
•
Mobile handsets
GPS and navigation devices
Portable media players
Digital still and video cameras
PDAs
Portable electronics
___________________________________________________________________________________________________________
Typical Application
MIC5326-xxYMT
VIN
VOUT
VOUT
VBAT
1µF
VEN
GND
1µF
LDO Application
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 9440800 • fax + 1 (408) 4741000 • http://www.micrel.com
October 2008
M9999-100808-A
Micrel, Inc.
MIC5326
Ordering Information
Part Number
MIC5326-2.8YMT
Note:
1.
2.
3.
For other voltage options contact Micrel Marketing.
Pin 1 identifier= “▲”.
MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Marking
(2)
2Q8
Voltage
(1)
2.8V
Temperature Range
–40° to +125°C
Package
(3)
4-Pin 1.2mm x 1.6mm Thin MLF
®
Pin Configuration
VIN 1
GND 2
4
3
VOUT
EN
4-Pin 1.2mm x 1.6mm Thin MLF
®
(MT)
Pin Description
Pin Number
1
2
3
4
HSPAD
Pin Name
VIN
GND
EN
VOUT
EPAD
Pin Function
Supply Input.
Ground.
Enable Input: Active High Logic Input. Logic High = On; Logic Low = Off. Do
not leave floating.
Output Voltage.
Exposed heatsink pad connected to ground internally.
October 2008
2
M9999-100808-A
Micrel, Inc.
MIC5326
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ........................................ –0.3V to +6V
Enable Voltage (V
EN
)......................................... –0.3V to V
IN
Power Dissipation (P
D
) ........................... Internally Limited
(3)
Lead Temperature ( soldering, 5sec.)........................ 260°C
Junction Temperature(T
J
).........................–40°C to +125°C
Storage Temperature (T
s
) .........................–65°C to +150°C
ESD Rating..................................................................... 2kV
Operating Ratings
(2)
Supply Voltage (V
IN
)......................................... 2.3V to 5.5V
Enable/Select Voltage (V
EN
)................................... 0V to V
IN
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
1.2mm x 1.6mm
Thin MLF-4 (θ
JA
)......................173°C/W
Electrical Characteristics
(5)
V
IN
= V
EN
= V
OUT
+ 1V; C
OUT
= 1µF; I
OUT
= 100µA; T
J
= 25°C,
bold
values indicate –40°C to +125°C, unless noted.
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
(6)
Condition
Variation from nominal V
OUT
Variation from nominal V
OUT
V
IN
= V
OUT
+1V to 5.5V, I
OUT
= 100µA
V
IN
= V
OUT
+1V to 5.5V, I
OUT
= 100µA
I
OUT
= 100µA to 150mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
Min
–1.5
–2.0
Typ
Max
+1.5
+2.0
Units
%
%
%/V
%/V
%
mV
mV
0.01
0.05
30
55
85
24
0.01
60
50
275
475
90
0.3
0.5
1
Dropout Voltage
(7)
150
35
1
mV
µA
µA
dB
dB
Ground Pin Current
(8)
Ground Pin Current in Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Enable Voltage
Enable Voltage
Enable Current
Turn on Time
Notes:
I
OUT
= 100µA to 150mA
V
EN
= 0V
f = 1kHz; C
OUT
= 1µF; I
OUT
= 150mA
f = 20kHz; C
OUT
= 1µF; I
OUT
= 150mA
V
OUT
= 0V
C
OUT
= 1µF, 10Hz to 100kHz
Logic Low
Logic High
V
IL
≤
0.2V
V
IH
≥
1.2V
C
OUT
= 1µF; I
OUT
= 150mA
1.2
750
mA
µV
RMS
0.2
0.01
0.01
150
1
1
500
V
V
µA
µA
µs
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any T
A
(ambient temperature) is P
D(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.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
5. Specification for packaged product only.
6. Regulation is measured at constant junction temperature using low duty cycle pulse testing.
7. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal V
OUT
8. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin
current.
October 2008
3
M9999-100808-A
Micrel, Inc.
MIC5326
Typical Characteristics
Power Supply
Rejection Ratio
50mA
3.00
2.95
2.90
100µA
150mA
100mA
2.85
2.80
2.75
V
IN
= V
OUT
+1V
0 V
OUT
= 2.8V
C
OUT
= 1µF
10
10
100
1k
10k 100k
FREQUENCY (Hz)
2.70
2.65
1M
2.60
0
V
IN
= V
EN
= V
OUT
+1
V
OUT
= 2.8V
C
IN
= C
OUT
= 1µF
25 50 75 100 125 150
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
Output Voltage
vs. Temperature
2.60
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
V
IN
= V
EN
= V
OUT
+1V
C
IN
= C
OUT
= 1µF
3.5
Output Voltage
vs. Input Voltage
32
Ground Current
vs. Output Current
100
90
80
70
60
50
40
30
20
10
0
0
Dropout Voltage
vs. Output Current
28
3.0
100µA
24
50mA
2.5
150mA
2.0
2.5
V
EN
= 1.2V
V
OUT
= 2.8V
C
IN
= C
OUT
= 1µF
5.5
20
V
IN
= V
EN
= V
OUT
+ 1
V
OUT
= 2.8V
C
IN
= C
OUT
= 1µF
25 50 75 100 125 150
OUTPUT CURRENT (mA)
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
16
0
V
EN
= V
IN
C
IN
= C
OUT
= 1µF
25 50 75 100 125 150
OUTPUT CURRENT (mA)
120
100
Dropout Voltage
vs. Temperature
32
Ground Current
vs. Temperature
34
30
Ground Current
vs. Input Voltage
28
80
60
40
20
V
EN
= 1.2V
V
OUT
= 2.8V
C
IN
= C
OUT
= 1µF
I
LOAD
= 150mA
24
100µA
150mA
V
IN
= V
EN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
IN
= C
OUT
= 1µF
26
22
100µA
18
14
10
2.5
3
150mA
20
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
16
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
V
IN
= V
EN
V
OUT
= 2.8V
C
IN
= C
OUT
= 1µF
3.5
4
4.5
5
INPUT VOLTAGE (V)
5.5
700
650
600
550
500
Current Limit
vs. Input Voltage
V
EN
= 1.2V
V
OUT
= 2.8V
C
IN
= C
OUT
= 1µF
100
Output Noise
Spectral Density
V
IN
= 4.5V
V
OUT
= 2.8V
C
OUT
= 1µF
10
1
0.1
450
400
2.5
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
5.5
0.01
100
1k
10k
100k
FREQUENCY (Hz)
1M
October 2008
4
M9999-100808-A
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