MIC5315
Low Voltage Dual 300mA LDO
with Voltage Select
General Description
The MIC5315 is a high performance, dual low input
voltage, low dropout regulator with voltage select. Major
features include two 300mA LDOs, input voltage down to
1.7V, ultra low drop out of 85mV at full load, and voltage
select. 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. Voltage select is incorporated into the second output,
which reduces the output voltage to a lower level to further
save power while in stand-by mode.
Ideal for battery operated applications; the MIC5315 offers
1% accuracy and low ground current to increase light load
efficiency. The MIC5315 can also be put into a zero-off-
mode current state, drawing virtually no current when
disabled.
The MIC5315 is available in fixed output voltages in the
10-pin 2mm x 2mm 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
Voltage select function
Stable with 1µF ceramic output capacitors
Very fast transient response
Thermal shutdown and current limit protection
Tiny 10-pin 2mm x 2mm 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
MIC5315-xxyYMT
VBAT
MIC23031-1.8YMT
DC-to-DC
Converter
VIN1
VIN2
VBIAS
CIN
1µF
CBIAS
1µF
/VSC2
EN1
EN2
GND
VOUT1
VOUT2
VCORE1
VCORE2
CBYP
1µF
10nF
1µF
µProcessor
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.
MIC5315
Ordering Information
Part Number
MIC5315-1.5/1.2/1.0YMT
MIC5315-1.5/1.3/1.0YMT
MIC5315-1.8/1.6/1.1YMT
MIC5315-1.8/1.8/1.0YMT
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
MIC5315-F4CYMT
MIC5315-F5CYMT
MIC5315-GW3YMT
MIC5315-GGCYMT
Marking
(1)
F4C
F5C
GW3
GGC
VOUT1
(2)
1.5V
1.5V
1.8V
1.8V
VOUT2
(2)
1.2V/1.0V
1.3V/1.0V
1.6V/1.1V
1.8V/1.0V
Junction
Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
(3)
10-Pin 2mm x 2mm
Thin MLF
®
10-Pin 2mm x 2mm
Thin MLF
®
10-Pin 2mm x 2mm
Thin MLF
®
10-Pin 2mm x 2mm
Thin MLF
®
Pin Configuration
VIN1
VIN2
VBIAS
EN1
EN2
1
2
3
4
5
10 VOUT1
9
8
7
6
VOUT2
/VSC2
CBYP
GND
®
10-Pin 2mm × 2mm Thin MLF (MT)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
Pin Name
VIN1
VIN2
VBIAS
EN1
EN2
GND
CBYP
/VSC2
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.
Ground.
Bypass: Connect a capacitor to ground to improve output noise and PSRR.
Voltage Select Input for LDO2. Active Low Input. Logic High = Full Output
Voltage; Logic Low = Low Output Voltage. Do not leave floating.
Output of regulator 2.
Output of regulator 1.
July 2008
2
M9999-070208-A
Micrel, Inc.
MIC5315
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
Voltage Select Input Voltage (V
/VSC2
) ...............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
Voltage Select Input Voltage (V
/VSC2
)............... 0V to V
BIAS
Junction Temperature (T
J
) .....................–40°C to +125°C
Junction Thermal Resistance
2mm x 2mm Thin MLF-10 (θ
JA
).............................80°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
= 25ºC,
bold
values indicate –40ºC to + 125ºC; unless noted.
Parameter
Output Voltage Accuracy
Select Mode 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
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
OUT2
, V
/VSC2
= Logic Low
V
OUT2
, V
/VSC2
= Logic Low
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
-3.0
-4.0
0.02
0.02
0.4
40
85
7
7
30
0.01
65
40
550
30
Typ
Max
+1.0
+2.0
+3.0
+4.0
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.
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
MIC5315
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.
MIC5315
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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