MIC5314
Low Voltage Dual 300mA LDO
with Power on Reset
General Description
The MIC5314 is a high performance, dual low input
voltage, low dropout regulator with Power On Reset
(POR). Major features include two 300mA LDOs, input
voltage down to 1.7V, ultra low drop out of 85mV at full
load, and Power On Reset. Each LDO has its own low
voltage input for system flexibility. The low input voltages
and low drop out operation provides high efficiency by
reducing the input to output voltage step which minimizes
the regulator power loss. An adjustable delay time POR
output is provided for the second regulator for design
flexibility.
Ideal for battery operated applications; the MIC5314 offers
1% accuracy and low ground current to increase light load
efficiency. The MIC5314 can also be put into a zero-off-
mode current state, drawing virtually no current when
disabled.
The MIC5314 is available in fixed output voltages in the
12-pin 2.5mm x 2.5mm Thin MLF
®
leadless package.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
300mA output current for each LDO
Dual low voltage regulator inputs: 1.7V to 5.5V
Low output voltage range: 0.8V to 2.0V
Ultra-low dropout voltage of 85mV @ 300mA
Power On Reset output with adjustable delay
Stable with 1µF ceramic output capacitors
Very fast transient response
Thermal shutdown and current limit protection
Tiny 12-pin 2.5mm x 2.5mm Thin MLF
®
package
Applications
•
•
•
•
•
•
Mobile Phones
GPS and Navigation Devices
Portable Media Players
Digital still and video cameras
PDAs
Portable electronics
___________________________________________________________________________________________________________
Typical Application
VI/O
MIC5314-xxYMT
VBAT
MIC23031-1.8YMT
DC-to-DC
Converter
VIN1
VIN2
VBIAS
CIN
1µF
CBIAS
1µF
VOUT1
VOUT2
POR2
VCORE1
VCORE2
/RST
1µF
10nF
1µF
µProcessor
EN1
EN2
GND
CBYP
CSET2
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
July 2008
M9999-070208-A
Micrel, Inc.
MIC5314
Ordering Information
Part Number
MIC5314-1.5/1.0YMT
MIC5314-1.5/1.1YMT
MIC5314-1.5/1.2YMT
MIC5314-1.5/1.3YMT
MIC5314-1.5/1.4YMT
MIC5314-1.5/1.5YMT
MIC5314-1.8/1.2YMT
MIC5314-1.8/1.8YMT
Notes:
1.
2.
3.
Pin 1 identifier =
▲.
For other voltage option, contact Micrel Marketing for details
MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
Manufacturing
Part Number
MIC5314-FCYMT
MIC5314-F3YMT
MIC5314-F4YMT
MIC5314-F5YMT
MIC5314-F6YMT
MIC5314-FFYMT
MIC5314-G4YMT
MIC5314-GGYMT
Marking
(1)
QFRC
QFR3
QFR4
QFR5
QFR6
QFRF
QGR4
QGRG
Voltage
(2)
1.5V/1.0V
1.5V/1.1V
1.5V/1.2V
1.5V/1.3V
1.5V/1.4V
1.5V/1.5V
1.8V/1.2V
1.8V/1.8V
Junction Temp.
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
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
(3)
12-Pin 2.5mm x 2.5mm Thin MLF
®
12-Pin 2.5mm x 2.5mm Thin MLF
®
12-Pin 2.5mm x 2.5mm Thin MLF
®
12-Pin 2.5mm x 2.5mm Thin MLF
®
12-Pin 2.5mm x 2.5mm Thin MLF
®
12-Pin 2.5mm x 2.5mm Thin MLF
®
12-Pin 2.5mm x 2.5mm Thin MLF
®
12-Pin 2.5mm x 2.5mm Thin MLF
®
Pin Configuration
VIN1
VIN2
VBIAS
EN1
EN2
CSET2
1
2
3
4
5
6
12 VOUT1
11 VOUT2
10 NC
9
8
7
CBYP
GND
POR2
12-Pin 2.5mm × 2.5mm Thin MLF
®
(MT)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
Pin Name
VIN1
VIN2
VBIAS
EN1
EN2
CSET2
POR2
GND
CBYP
NC
VOUT2
VOUT1
Pin Function
Voltage Input for LDO1.
Voltage Input for LDO2.
Bias Input Voltage.
Enable Input for LDO1. Active High Input. Logic High = On; Logic Low = Off; Do
not leave floating.
Enable Input for LDO2. Active High Input. Logic High = On; Logic Low = Off; Do
not leave floating.
Delay Set Input for POR2. Connect an external capacitor to GND to set the
delay for POR2. When left open, there is no delay. Do not ground this pin.
Power-on Reset for LDO2.
Ground.
Bypass: Connect a capacitor to ground to improve output noise and PSRR.
No Connect. Not internally connected.
Output of regulator 2.
Output of regulator 1.
July 2008
2
M9999-070208-A
Micrel, Inc.
MIC5314
Absolute Maximum Ratings
(1)
Main Input Voltage (V
IN1
, V
IN2
)..........................0V to V
BIAS
Bias Supply Voltage (V
BIAS
)...............................0V to +6V
Enable Input Voltage (V
EN1
, V
EN2
) ....................0V to V
BIAS
POR Voltage (V
POR2
) ........................................0V to V
BIAS
Power Dissipation ...............................Internally Limited
(3)
Lead Temperature (soldering, 3sec.)......................260°C
Storage Temperature (T
s
) ..................... –65°C to +150°C
ESD Rating
(4)
...............................................................2kV
Operating Ratings
(2)
Supply voltage (V
IN1
, V
IN2
)...........................+1.7V to V
BIAS
Bias Supply Voltage (V
BIAS
) ........................ 2.5V to +5.5V
Enable Input Voltage (V
EN1
, V
EN2
) ................... 0V to V
BIAS
POR Voltage (V
POR2
)........................................ 0V to V
BIAS
Junction Temperature (T
J
) .....................–40°C to +125°C
Junction Thermal Resistance
2.5mm x 2.5mm Thin MLF-12 (θ
JA
).......................70°C/W
Electrical Characteristics
(4)
V
BIAS
= 3.6V; V
IN1
= V
IN2
= V
OUT
(Highest of two regulators) + 1V; C
BIAS
=C
OUT
= 1.0µF, C
BYP
=0.01µF, I
OUT
= 100µA;
T
J
= 25°C,
bold
values indicate –40°C to + 125°C; unless noted.
Parameter
Output Voltage Accuracy
V
IN
Line Regulation
V
BIAS
Line Regulation
Load Regulation
Dropout Voltage
Ground Pin Current V
IN1
,V
IN2
Ground Pin Current V
BIAS
Ground Pin Current in
Shutdown
V
IN
Ripple Rejection
Current Limit
Output Voltage Noise
Enable
Enable Input Voltage
Enable Input Current
Turn-on Time
POR2 Output
V
TH
V
OL
I
POR2
Low Threshold, % of V
OUT2
(Flag ON)
High Threshold, % of V
OUT2
(Flag OFF)
POR2 Output Logic Low Voltage; I
L
= 250µA
Flag Leakage Current, Flag OFF
–1
0.02
0.01
88
98
0.1
+1
%
%
V
µA
Logic Low
Logic High
V
IL
≤
0.2V
V
IH
≥
1.2V
C
OUT
= 1µF; C
BYP
= 0.01µF
1.2
0.02
0.2
150
1
1
300
0.2
V
V
µA
µA
µs
Condition
Variation from nominal V
OUT1
& V
OUT2
Variation from nominal V
OUT1
& V
OUT2
V
IN
= V
OUT
+1V to 5.5V, V
BIAS
= 5.5V
V
BIAS
= 3.6V to 5.5V, V
IN
= V
OUT
+1V
I
OUT
= 100µA to 300mA
I
OUT
= 150mA
I
OUT
= 300mA
V
EN1
= High; V
EN2
= Low; I
OUT1
= 100µA to 300mA
V
EN1
= Low; V
EN2
= High; I
OUT2
= 100µA to 300mA
I
OUT1
= I
OUT2
= 100µA to 300mA
V
EN
≤
0.2V
f = 1kHz; C
OUT
= 1.0µF; C
BYP
= 0.01µF
f = 20kHz; C
OUT
= 1.0µF; C
BYP
= 0.01µF
V
OUT
= 0V
C
OUT
= 1µF, C
BYP
= 0.01µF, 10Hz to 100kHz
350
Min
–1.0
–2.0
0.02
0.02
0.4
40
85
7
7
30
0.01
65
40
550
30
Typ
Max
+1.0
+2.0
0.3
0.3
1.0
100
200
12
12
46
1.0
Units
%
%
%/V
%/V
%
mV
mV
µA
µA
µA
µA
dB
dB
mA
µV
RMS
July 2008
3
M9999-070208-A
Micrel, Inc.
MIC5314
Parameter
CSET2 INPUT
CSET2 Pin Current Source
CSET2 Pin Threshold
Voltage
Notes:
Condition
V
CSET2
= 0V
POR2 = High
Min
0.8
1.212
Typ
1.4
1.25
Max
2
1.288
Units
µA
V
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.
July 2008
4
M9999-070208-A
Micrel, Inc.
MIC5314
Typical Characteristics
Power Supply
Rejection Ratio (V
IN
)
150mA
Power Supply
Rejection Ratio (V
BIAS
)
150mA
16
15
14
Ground Current (V
IN
)
vs. Temperature
300mA
300mA
V
IN
= V
OUT
+1V
V
OUT
= 1.8V
C
OUT
= 1µF
C
BYP
= 10nF
100
1k
10k 100k
FREQUENCY (Hz)
1M
V
IN
= V
OUT
+1V
V
OUT
= 1.8V
C
OUT
= 1µF
C
BYP
= 10nF
100
1k
10k 100k
FREQUENCY (Hz)
1M
13
V
IN
= V
OUT
+1V
0
10
0
10
V
BIAS
= 3.6V
12
V
OUT1
= 1.5V
V
OUT2
= 1.2V
C
OUT
= 1µF
11
C
BYP
= 10nF
I
OUT1
= I
OUT2
= 300mA
10
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
16.0
15.5
15.0
14.5
14.0
13.5
13.0
12.5
12.0
0
Ground Current (V
IN
)
vs. Output Current
V
IN
= V
OUT
+1V
V
BIAS
= 3.6V
V
OUT1
= 1.5V
V
OUT2
= 1.2V
C
OUT
= 1µF
C
BYP
= 10nF
30
29
Ground Current (V
BIAS
)
vs. Output Current
16
Ground Current (V
IN
)
vs. Input Voltage
15
28
27
26
25
V
IN
= V
OUT
+1V
V
BIAS
= 3.6V
V
OUT1
= 1.5V
V
OUT2
= 1.2V
C
OUT
= 1µF
C
BYP
= 10nF
50 100 150 200 250 300
OUTPUT CURRENT (mA)
14
300mA
10mA
V
BIAS
= 3.6V
V
OUT1
= 1.5V
V
OUT2
= 1.2V
C
OUT
= 1µF
C
BYP
= 10nF
13
50 100 150 200 250 300
OUTPUT CURRENT (mA)
24
0
12
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
120
100
80
60
40
20
Dropout Voltage
vs. Temperature
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0
Dropout Voltage
vs. Load Current
1.70
1.65
1.60
1.55
1.50
1.45
Output Voltage
vs. Temperature
300mA
V
OUT
= 1.5V
C
OUT
= 1µF
150mA
10mA
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
V
BIAS
= 3.6V
V
OUT
= 1.8V
C
OUT
= 1µF
50 100 150 200 250 300
LOAD CURRENT (mA)
1.40
1.35
1.30
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
V
IN
= V
OUT
+1V
V
BIAS
= 3.6V
EN = V
IN
V
OUT
= 1.5V
C
OUT
= 1µF
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
0
Output Voltage
vs. Output Current
2.0
1.8
1.6
1.4
1.2
1.0
0.8
Output Voltage
vs. Input Voltage
1.8V
650
630
610
590
570
550
530
Current Limit
vs. Input Voltage
1.1V
V
IN
= V
OUT
+1V
V
BIAS
= 3.6V
V
OUT
= 1.5V
C
OUT
= 1µF
50 100 150 200 250 300
OUTPUT CURRENT (mA)
0.6
0.4
0.2
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
INPUT VOLTAGE (V)
V
BIAS
= 5.5V
I
OUT
= 10mA
C
OUT1
= 1µF
C
OUT2
= 1µF
510
490
470
450
1.5 2 2.5 3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
V
BIAS
= 5.5V
V
OUT
= 1.5V
C
OUT
= 1µF
July 2008
5
M9999-070208-A
嵌入式系统
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