MIC5307
300mA Micropower Cap
Baseband LDO
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
October 2006
1
M9999-102706-A
General Description
The MIC5307 is a micropower, Cap low dropout regulator
designed for optimal performance where smaller packages
are required. It is capable of sourcing 300mA of output
current while only drawing 20A 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 Cap 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.
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 20A 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
VOUT
VIN
EN
GND
2.2F
1F
MIC5307
0
2
4
6
8
10
12
14
20
22
24
26
20 40 60 80
TEMPERATURE (C)
Ground Pin Current
vs. Temperature
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 2.2F
100A
300mA
16
18
Micrel, Inc.
MIC5307
October 2006
4
M9999-102706-A
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
) ........................40C to +125C
Lead Temperature (soldering, 5sec.)......................... 260C
Storage Temperature (T
s
) .........................65C to +150C
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
) ........................ 40C to +125C
Thermal Resistance
TSOT23-5
(
JA
)................................................235C/W
Electrical Characteristics
(5)
V
IN
= V
OUT
+ 1.0V; C
OUT
= 2.2F; I
OUT
= 100A; T
J
= 25C, bold values indicate 40C to +125C, unless noted.
Parameter Condition
Min
Typ
Max
Units
Variation from nominal V
OUT
1
+1
%
Output Voltage Accuracy
Variation from nominal V
OUT
; 40C to +125C
2 +2 %
Line Regulation
V
IN
= V
OUT
+1V to 5.5V
0.01
0.3
0.5
%/V
%/V
Load Regulation
I
OUT
= 100A to 300mA
0.5
1
1.5
%
%
Dropout Voltage
(4)
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
I
OUT
= 300mA
20
40
60
120
250
mV
mV
mV
mV
Ground Pin Current
I
OUT
= 0mA to 150mA; V
IN
= 5.5V
I
OUT
= 0mA to 300mA; V
IN
= 5.5V
18
20
30
A
A
Ground Pin Current in Shutdown
V
EN
< 0.2V; V
IN
= 5.5V
0.01
1
A
Ripple Rejection
f = 10Hz to 1kHz; C
OUT
= 2.2F; I
OUT
= 300mA
f = 20kHz; C
OUT
= 2.2F; I
OUT
= 300mA
62
35
dB
dB
Current Limit
V
OUT
= 0V
350
500
800
mA
Thermal
Shutdown
160 C
Thermal Shutdown Hysteresis
20
C
Output Voltage Noise
C
OUT
= 2.2F; 10Hz to 100kHz
80
V
RMS
Enable Input
Logic Low
0.2
V
Enable Input Voltage
Logic High
1.0
V
V
IL
< 0.2V
0.01
1
A
Enable Input Current
V
IH
> 1.0V
0.01
1
A
Turn-on Time
(6)
C
OUT
= 2.2F
270
500
s
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
/
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.
PDF 
ZIP
