MIC5309
Low V
IN
/V
OUT
300mA High PSRR
ULDO™ with Ultra-Low IQ
General Description
The MIC5309 is a high performance, µCap low dropout
regulator, offering ultra-low operating current while
maintaining very fast transient response. The MIC5309
can source up to 300mA of output current and can
regulate down from a low input supply voltage to increase
system efficiency.
Ideal for battery operated applications; the MIC5309 offers
extremely low dropout voltage 100mV typically @ 300mA
load, and low ground current at all load conditions
(typically 23µA). The MIC5309 can also be put into a zero-
off-mode current state, drawing virtually no current when
disabled.
The MIC5309 is available in fixed output voltages in the
tiny 6-pin 1.6mm x 1.6mm thin MLF
®
leadless package as
well as the 6-pin TSOT-23 for cost sensitive applications.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Input voltage range: 1.7V to 5.5V
Guaranteed 300mA over temperature
Ultra Low dropout voltage of 100mV typical 300mA
High PSRR, up to 90dB @ 1kHz
Output Voltage range: 0.8V to 2.0V
Very low ground current – 23µA under full load
Bias supply voltage range: 2.5V to 5.5V
Stable with 1µF ceramic output capacitor
300mA maximum output current at 1.7V input voltage
Very fast transient response – ideal for digital loads
Thermal shutdown and current limit protection
Tiny 6-pin 1.6mm x 1.6mm Thin MLF
®
package
Cost effective 6-pin TSOT-23 package
Applications
•
•
•
•
Mobile Phones
PDAs
GPS Receivers
Portable Electronics
___________________________________________________________________________________________________________
Typical Application
MIC5309
BIAS
VIN
VOUT
Li-Ion
2.7V to 4.2V
MIC23050
DC-to-DC
Converter
C
BIAS
1µF
C
IN
1µF
EN
GND
BYP
C
BYP
10nF
C
OUT
1µF
ULDO is a trademark of Micrel, Inc.
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
May 2008
M9999-051508-D
Micrel, Inc.
MIC5309
Ordering Information
Part Number
MIC5309-1.2YMT
MIC5309-1.5YMT
MIC5309-1.8YMT
MIC5309YMT
MIC5309-1.2YD6
MIC5309-1.5YD6
MIC5309-1.8YD6
MIC5309YD6
Notes
For other voltage options. Contact Micrel Marketing for details.
Pin 1 identifier = .
MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
▲
Voltage
1.2V
1.5V
1.8V
Adj.
1.2V
1.5V
1.8V
Adj.
Marking Codes
▲
▲
▲
▲
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
Package
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin TSOT-23
6-Pin TSOT-23
6-Pin TSOT-23
6-Pin TSOT-23
1S2
1S5
1S8
ASA
QS12
QS15
QS18
QSAA
Pin Configuration
BIAS
3
BIAS 1
GND 2
VIN 3
6
5
4
BYP/ADJ
EN
VOUT
4
5
6
VOUT
BYP/ADJ EN
GND
2
VIN
1
6-Pin 1.6mm x 1.6mm Thin MLF (MT)
®
6-Pin TSOT-23 (D6)
Pin Description
Pin Number
Thin MLF-6
3
2
1
6
5
4
HS Pad
Pin Number
TSOT-23-6
1
2
3
4
Pin Name
VIN
GND
BIAS
BYP
ADJ
Pin Function
Power Input for LDO.
Ground
Bias Input Voltage.
Bypass: Connect a capacitor to ground to reduce noise and
reduce ripple rejection.
Adjustable: Feedback input from external resistor divider.
Enable Input: Active High Input. Logic High = On;
Logic Low = Off; Do not leave floating.
Output of regulator.
Exposed heatsink pad connected to ground internally.
5
6
–
EN
VOUT
EPAD
May 2008
2
M9999-051508-D
Micrel, Inc.
MIC5309
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ............................................ 0V to V
BIAS
Bias Supply Voltage (V
BIAS
).................................. 0V to +6V
Enable Voltage (V
EN
)........................................... 0V to V
BIAS
Power Dissipation, ................................ Internally Limited
(3)
Lead Temperature (soldering, 10µsec.)..................... 260°C
Storage Temperature (T
s
) .........................–65°C to +150°C
ESD Rating
(4)
.................................................................. 3kV
Operating Ratings
(2)
Supply Voltage (V
IN
)....................................... +1.7V to V
BIAS
Bias Supply Voltage (V
BIAS
).......................... +2.5V to +5.5V
Enable Input Voltage (V
EN
)
0V to V
BIAS
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
1.6x1.6 MLF-6 (θ
JA
) ...........................................90°C/W
TSOT-23-6 (θ
JA
)...............................................235°C/W
Electrical Characteristics
V
BIAS
= 3.6V; V
IN
= V
OUT
+ 1V; V
IN
≤
V
BIAS
; C
OUT
= 1.0µF; I
OUT
= 100µA; T
J
= 25°C,
bold
values indicate –40°C to +125°C,
unless noted.
Parameter
Output Voltage Accuracy
Reference Voltage
V
BIAS
Line Regulation
V
IN
Line Regulation
Load Regulation
Dropout Voltage
Ground Pin Current
(5)
Condition
Variation from nominal V
OUT
ADJ pin voltage
V
BIAS
= 3.6 to 5.5V,
V
IN
= V
OUT
+ 1V
Min
–
2.0
Typ
0.775
0.01
0.02
0.4
100
23
0.01
70
Max
+2.0
0.7905
0.3
0.2
2
200
35
2.0
Units
%
V
%/V
%/V
%
mV
µA
µA
dB
dB
dB
0.7595
V
IN
= V
OUT
+ 1V ,
V
BIAS
= 5.5V
I
OUT
= 100µA to 300mA
I
OUT
= 300mA
I
OUT
= 100µA to 300mA , V
EN
= V
BIAS
V
EN
≤
0.2V
f = up to 1kHz; C
OUT
= 1.0µF; no C
BYP
f = up to 1kHz; C
OUT
= 1.0µF; C
BYP
= 10nF
f = 20kHz; C
OUT
= 1.0µF; C
BYP
= 10nF
50
350
Ground Pin Current in
Shutdown
V
IN
Ripple Rejection
90
80
550
28
800
Current Limit
Output Voltage Noise
V
OUT
= 0V
C
OUT
= 1.0µF, C
BYP
= 10nF, 10Hz to 100kHz
Logic Low
Logic High
mA
µV
RMS
Enable Inputs (EN)
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. 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. I
GND
= I
IN
+ I
BIAS
– I
OUT
.
0.2
1.2
0.17
1.5
150
V
V
µA
µA
µs
V
IL
≤
0.2V
V
IH
≥
1.2V
C
OUT
= 1.0µF, C
BYP
= 10nF
1
1
500
May 2008
3
M9999-051508-D
Micrel, Inc.
MIC5309
Typical Characteristics
-120
-100
-80
-60
100mA
-40
300mA
Power Supply
Rejection Ratio (V
IN
)
100µA
150mA
50mA
100µA
(no byp)
-120
-100
-80
-60
-40
Power Supply
Rejection Ratio (V
BIAS
)
100µA
20
18
16
14
12
10
Ground Current (V
IN
)
vs. Temperature
V
IN
= 2.2V
V
BIAS
= 3.6V
V
OUT
= 1.2V
C
OUT
= 1µF
100µA
(no byp)
300mA
150mA
V
IN
= V
OUT
+ 1V
V
OUT
= 1.2V
-20 C
OUT
= 1µF
C
BYP
= 0.01µF
0
10
100
1K
10K 100K
FREQUENCY (Hz)
1M
V
IN
= 2.8V
V
OUT
= 1.8V
-20 C
OUT
= 1µF
C
BYP
= 0.01µF
0
10
100
1K
10K 100K
FREQUENCY (Hz)
8
300mA
6
4
2
0
100µA
1M
20 40 60 80
TEMPERATURE (°C)
20
18
16
14
12
10
8
6
4
2
0
0
Ground Current (V
IN
)
vs. Output Current
V
IN
= 2.2V
V
BIAS
= 3.6V
V
OUT
= 1.2V
C
OUT
= 1µF
18
16
14
12
10
8
6
4
2
0
0
Ground Current (V
BIAS
)
vs. Output Current
30
28
26
24
22
20
Ground Current (Total)
vs. Output Current
V
IN
= 2.2V
V
BIAS
= 3.6V
C
OUT
= 1µF
C
IN
= 1µF
C
BYP
= 0.01µF
50 100 150 200 250 300
OUTPUT CURRENT (mA)
18
16
14
12
10
0
V
IN
= 2.2V
V
BIAS
= 3.6V
C
OUT
= 1µF
C
IN
= 1µF
C
BYP
= 0.01µF
50 100 150 200 250 300
OUTPUT CURRENT (mA)
50 100 150 200 250 300
OUTPUT CURRENT (mA)
10
100µA
9
8
7
6
5
4
3
2
1
0
1.5
Ground Current (V
IN
)
vs. V
IN
40
35
Bias Current
vs. Enable Voltage
120
100
Dropout Voltage
vs. Temperature
C
OUT
= 1µF
300mA
300mA
30
25
20
15
100µA
300mA
80
60
40
150mA
V
BIAS
= 5.5V
V
OUT
= 1.78V
C
OUT
= 1µF
2.5
3.5
VIN (V)
4.5
5.5
10
5
0
0
V
BIAS
= 5.5V
V
OUT
= 1.8V
C
OUT
= 1µF
1
2
3
4
5
ENABLE VOLTAGE (V)
6
20
100µA
0
20 40 60 80
TEMPERATURE (°C)
120
110
100
90
80
70
60
50
40
30
20
10
0
0
Dropout Voltage
vs. Output Current
1.30
Output Voltage
vs. Temperature
1.30
Output Voltage
vs. Output Current
V
IN
= 2.2V
V
BIAS
= 3.6V
V
OUT
= 1.2V
C
OUT
= 1µF
1.25
1.25
1.20
V
IN
= 2.2V
V
BIAS
= 3.6V
V
OUT
= 1.2V
C
OUT
= 1µF
I
OUT
= 100µA
20 40 60 80
TEMPERATURE (°C)
1.20
1.15
C
OUT
= 1µF
50 100 150 200 250 300
OUTPUT CURRENT (mA)
1.15
1.10
1.10
0
50 100 150 200 250 300
OUTPUT CURRENT (mA)
May 2008
4
M9999-051508-D
Micrel, Inc.
MIC5309
Typical Characteristics
1.5
Output Voltage
vs. V
IN
100µA
0.900
0.875
0.850
Reference Voltage
vs. Temperature
V
IN
= 2.2V
V
BIAS
= 3.6V
V
OUT
= 1.2V
C
OUT
= 1µF
I
OUT
= 100µA
700
675
650
625
600
575
550
525
Current Limit
vs. V
IN
1.0
300mA
0.5
150mA
V
BIAS
= 3.6V
V
OUT
= 1.2V
C
OUT
= 1µF
0.825
0.800
0.775
0.750
0.725
0.700
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
VIN (V)
20 40 60 80
TEMPERATURE (°C)
500
1.5 2 2.5 3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
V
OUT
= 1.8V
V
BIAS
= 3.6V
10
Output Noise
Spectral Density
1
0.1
0.01 C
OUT
= 1µF
C
BYP
= 0.01µF
I
LOAD
0.001
10
100
1K
10K 100K
FREQUENCY (Hz)
1M
May 2008
5
M9999-051508-D
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