MIC5307
300mA Micropower µCap
Baseband LDO
General Description
The MIC5307 is a micropower, µCap low dropout regulator
designed for optimal performance where smaller packages
are required. It is capable of sourcing 300mA of output
current while only drawing 20µA of operating current. This
high performance LDO offers fast transient response and
good PSRR while consuming a minimum of current.
Ideal for battery operated applications; the MIC5307 offers
1% initial accuracy, extremely low dropout voltage and is
equipped with a TTL logic compatible enable pin. The
MIC5307 can be put into a zero-off-mode current state,
drawing no current when disabled.
The MIC5307 is a µCap design, operating with very small
ceramic output capacitors for stability, reducing required
board space and component cost.
The MIC5307 is available in fixed output voltages in the
Thin SOT23-5 package and the 6-pin 2mm x 2mm Thin
MLF
®
package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
•
•
•
•
•
Input voltage range: 2.4V to 5.5V
Ultra-low IQ: Only 20µA operating current
Stable with ceramic output capacitor
Low dropout voltage of 120mV @ 300mA
High output accuracy
– ±1.0% initial accuracy
– ±2.0% over temperature
•
Thermal Shutdown Protection
•
Current Limit Protection
Applications
•
•
•
•
•
•
Digital Logic Power Supply
Stand-by power supply
Cellular phones
PDAs
Portable electronics
Notebook PCs
Typical Application
Ground Pin Current
vs. Temperature
300mA
100µA
MIC5307
VIN
EN
GND
VOUT
1µF
2.2µF
26
24
22
20
18
16
14
12
10
8
6
4
2
0
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 2.2µF
20 40 60 80
TEMPERATURE (°C)
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
August 2007
M9999-082407-B
Micrel, Inc.
MIC5307
Block Diagram
VIN
EN
Quick-
Start
VOUT
V
REF
Error
LDO
Amp
Thermal
Shutdown
Current
Limit
GND
August 2007
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M9999-082407-B
Micrel, Inc.
MIC5307
Ordering Information
(1)
Part Number
MIC5307-1.5YD5
MIC5307-1.8YD5
MIC5307-2.8YD5
MIC5307-3.0YD5
MIC5307-2.8YMT
Notes
* Underbar ( _ ) symbol may not be to scale.
** 2x2mm Thin MLF® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Marking Code
QQ15*
QQ18*
QQ28*
QQ30*
Q28**
Voltage
1.5V
1.8V
2.8V
3.0V
2.8V
Temperature Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
5-Pin TSOT23
5-Pin TSOT23
5-Pin TSOT23
5-Pin TSOT23
6-Pin 2mm x 2mm Thin MLF
®
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pin Configuration
EN GND VIN
1
3
2
EN 1
GND 2
4
N/C
5
OUT
6 NC
5 NC
4 VOUT
VIN 3
MIC5307-x.xYD5
5-Pin Thin SOT23 (D5)
MIC5307-x.xYMT
6-Pin 2mm x 2mm Thin MLF
®
(MT)
Pin Description
Pin Number
TSOT23
1
2
3
4
5
–
Pin Number
Thin MLF
®
3
2
1
5
4
6
Pin Name
VIN
GND
EN
NC
VOUT
NC
Pin Function
Supply Input
Ground
Enable Input. Active High. High = on, low = off. Do not leave floating
No Connect
Output Voltage
No Connect
August 2007
3
M9999-082407-B
Micrel, Inc.
MIC5307
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ............................................... 0V to 6V
Enable Input Voltage (V
EN
)..................................... 0V to 6V
Power Dissipation (P
D
)
(3)
...........................Internally Limited
Junction Temperature (T
J
) ........................–40°C to +125°C
Lead Temperature (soldering, 5sec.)......................... 260°C
Storage Temperature (T
s
) .........................–65°C to +150°C
ESD Rating
(4)
.................................................................. 2kV
Operating Ratings
(2)
Supply voltage (V
IN
) ....................................... 2.4V to +5.5V
Enable Input Voltage.............................................. 0V to V
IN
Junction Temperature (T
J
) ........................ –40°C to +125°C
Thermal Resistance
TSOT23-5 (θ
JA
)................................................235°C/W
2x2 Thin MLF-6 (θ
JA
) .........................................93°C/W
Electrical Characteristics
(5)
V
IN
= V
OUT
+ 1.0V; C
OUT
= 2.2µF; 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
Dropout Voltage
(4)
Condition
Variation from nominal V
OUT
Variation from nominal V
OUT
; –40°C to +125°C
V
IN
= V
OUT
+1V to 5.5V
I
OUT
= 100µA to 300mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
I
OUT
= 300mA
I
OUT
= 0mA to 150mA; V
IN
= 5.5V
I
OUT
= 0mA to 300mA; V
IN
= 5.5V
V
EN
< 0.2V; V
IN
= 5.5V
f = 10Hz to 1kHz; C
OUT
= 2.2µF; I
OUT
= 300mA
f = 20kHz; C
OUT
= 2.2µF; I
OUT
= 300mA
V
OUT
= 0V
Min
–1
–2
0.01
0.5
20
40
60
120
18
20
0.01
62
35
500
160
20
80
Typ
Max
+1
+2
0.3
0.5
1
1.5
Units
%
%
%/V
%/V
%
%
mV
mV
mV
mV
µA
µA
µA
dB
dB
mA
°C
°C
µV
RMS
V
V
µA
µA
µs
250
30
1
Ground Pin Current
Ground Pin Current in Shutdown
Ripple Rejection
Current Limit
Thermal Shutdown
Thermal Shutdown Hysteresis
Output Voltage Noise
Enable Input
Enable Input Voltage
Enable Input Current
Turn-on Time
(6)
Notes:
350
800
C
OUT
= 2.2µF; 10Hz to 100kHz
Logic Low
Logic High
V
IL
< 0.2V
V
IH
> 1.0V
C
OUT
= 2.2µF
0.2
1.0
0.01
0.01
270
1
1
500
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.
5. Specification for packaged product only.
6. Turn-on time is measured from V
EN
= 1V of the positive edge of the enable signal to 90% of the rising edge of the output voltage of the regulator.
August 2007
4
M9999-082407-B
Micrel, Inc.
MIC5307
Typical Characteristics
26
24
22
20
18
16
14
12
10
8
6
4
2
0
0
Ground Pin Current
vs. Output Current
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 2.2µF
50 100 150 200 250 300
OUTPUT CURRENT (mA)
26
24
22
20
18
16
14
12
10
8
6
4
2
0
Ground Pin Current
vs. Temperature
300mA
100µA
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 2.2µF
20 40 60 80
TEMPERATURE (°C)
26
24
22
300mA
20
18
100µA
16
14
12
10
8
6
4
V
OUT
= 2.8V
2
C
OUT
= 2.2µF
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
Ground Pin Current
vs. Supply Voltage
-80
-70
-60
Power Supply
Rejection Ratio
150mA
150
125
Dropout Voltage
vs. Output Current
160
Dropout Voltage
vs. Temperature
300mA
V
OUT
= 2.8V
140 C
OUT
= 2.2µF
120
-50
300mA
-40
-30
-20
50mA
100
75
50
25
V
OUT
= 2.8V
C
OUT
= 2.2µF
50 100 150 200 250 300
OUTPUT CURRENT (mA)
100
80
60
40
20
0
150mA
100mA
50mA
100µA
20 40 60 80
TEMPERATURE (°C)
V
IN
= V
OUT
+ 1V
-10 V
OUT
= 2.8V
C
OUT
= 2.2µF
0
0.1
1
10
100
FREQUENCY (kHz)
1,000
0
0
3.0
Output Voltage
vs. Output Current
600
580
Current Limit
vs. Input Voltage
3.4
3.2
3.0
2.8
2.6
2.4
Output Voltage
vs. Temperature
2.9
560
540
2.8
520
500
2.7
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 2.2µF
50 100 150 200 250 300
OUTPUT CURRENT (mA)
480
460
440
3.0
V
OUT
= 2.8V
C
OUT
= 2.2µF
3.5
4.0
4.5
5.0
INPUT VOLTAGE (V)
5.5
2.2
2.0
2.6
0
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 2.2µF
I
OUT
= 100µA
20 40 60 80
TEMPERATURE (°C)
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
0
Output Voltage
vs. Supply Voltage
100µA
300mA
10
Output Noise
Spectral Density
1
0.1
V
OUT
= 2.8V
C
OUT
= 2.2µF
1
2
3
4
5
SUPPLY VOLTAGE (V)
6
0.01 V
IN
= 3.8V
V
OUT
= 2.8V
C
OUT
= 2.2µF
0.001
0.01
0.1
1
10
100 1,000
FREQUENCY (kHz)
August 2007
5
M9999-082407-B
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