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
November 2007
M9999-110807-B
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 = .
▲
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
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.
5
6
EN
VOUT
November 2007
2
M9999-110807-B
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
November 2007
3
M9999-110807-B
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