Micrel MIC5314-F4YMT Low voltage dual 300ma ldo with power on reset Datasheet

MIC5314
Low Voltage Dual 300mA LDO
with Power on Reset
General Description
Features
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-offmode 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.
•
•
•
•
•
•
•
•
•
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
MIC23031-1.8YMT
DC-to-DC
Converter
VBAT
VIN1
VOUT1
VCORE1
VOUT2
VCORE2
VIN2
VBIAS
CIN
1µF
CBIAS
1µF
POR2
EN1
CBYP
EN2
CSET2
GND
/RST
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.
MIC5314
Ordering Information
Part Number
Manufacturing
Part Number
Marking(1)
Voltage(2)
Junction Temp.
Range
Package(3)
MIC5314-1.5/1.0YMT
MIC5314-FCYMT
QFRC
1.5V/1.0V
–40°C to +125°C
12-Pin 2.5mm x 2.5mm Thin MLF®
MIC5314-1.5/1.1YMT
MIC5314-F3YMT
QFR3
1.5V/1.1V
–40°C to +125°C
12-Pin 2.5mm x 2.5mm Thin MLF®
MIC5314-1.5/1.2YMT
MIC5314-F4YMT
QFR4
1.5V/1.2V
–40°C to +125°C
12-Pin 2.5mm x 2.5mm Thin MLF®
MIC5314-1.5/1.3YMT
MIC5314-F5YMT
QFR5
1.5V/1.3V
–40°C to +125°C
12-Pin 2.5mm x 2.5mm Thin MLF®
MIC5314-1.5/1.4YMT
MIC5314-F6YMT
QFR6
1.5V/1.4V
–40°C to +125°C
12-Pin 2.5mm x 2.5mm Thin MLF®
MIC5314-1.5/1.5YMT
MIC5314-FFYMT
QFRF
1.5V/1.5V
–40°C to +125°C
12-Pin 2.5mm x 2.5mm Thin MLF®
MIC5314-1.8/1.2YMT
MIC5314-G4YMT
QGR4
1.8V/1.2V
–40°C to +125°C
12-Pin 2.5mm x 2.5mm Thin MLF®
MIC5314-1.8/1.8YMT
MIC5314-GGYMT
QGRG
1.8V/1.8V
–40°C to +125°C
12-Pin 2.5mm x 2.5mm Thin MLF®
Notes:
1.
Pin 1 identifier = ▲.
2.
For other voltage option, contact Micrel Marketing for details
3.
MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
Pin Configuration
VIN1
1
12 VOUT1
VIN2
2
11 VOUT2
VBIAS
3
10 NC
EN1
4
9
CBYP
EN2
5
8
GND
CSET2
6
7
POR2
12-Pin 2.5mm × 2.5mm Thin MLF® (MT)
Pin Description
Pin Number
Pin Name
1
VIN1
Voltage Input for LDO1.
2
VIN2
Voltage Input for LDO2.
3
VBIAS
4
EN1
Enable Input for LDO1. Active High Input. Logic High = On; Logic Low = Off; Do
not leave floating.
5
EN2
Enable Input for LDO2. Active High Input. Logic High = On; Logic Low = Off; Do
not leave floating.
6
CSET2
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.
7
POR2
Power-on Reset for LDO2.
8
GND
Ground.
9
CBYP
Bypass: Connect a capacitor to ground to improve output noise and PSRR.
July 2008
Pin Function
Bias Input Voltage.
10
NC
11
VOUT2
No Connect. Not internally connected.
Output of regulator 2.
12
VOUT1
Output of regulator 1.
2
M9999-070208-A
Micrel, Inc.
MIC5314
Absolute Maximum Ratings(1)
Operating Ratings(2)
Main Input Voltage (VIN1, VIN2)..........................0V to VBIAS
Bias Supply Voltage (VBIAS)...............................0V to +6V
Enable Input Voltage (VEN1, VEN2) ....................0V to VBIAS
POR Voltage (VPOR2) ........................................0V to VBIAS
Power Dissipation ...............................Internally Limited(3)
Lead Temperature (soldering, 3sec.)......................260°C
Storage Temperature (Ts) ..................... –65°C to +150°C
ESD Rating(4) ...............................................................2kV
Supply voltage (VIN1, VIN2)...........................+1.7V to VBIAS
Bias Supply Voltage (VBIAS) ........................ 2.5V to +5.5V
Enable Input Voltage (VEN1, VEN2) ................... 0V to VBIAS
POR Voltage (VPOR2)........................................ 0V to VBIAS
Junction Temperature (TJ) .....................–40°C to +125°C
Junction Thermal Resistance
2.5mm x 2.5mm Thin MLF-12 (θJA).......................70°C/W
Electrical Characteristics(4)
VBIAS = 3.6V; VIN1= VIN2 = VOUT (Highest of two regulators) + 1V; CBIAS=COUT= 1.0µF, CBYP=0.01µF, IOUT = 100µA;
TJ = 25°C, bold values indicate –40°C to + 125°C; unless noted.
Parameter
Condition
Min
Output Voltage Accuracy
Variation from nominal VOUT1 & VOUT2
Variation from nominal VOUT1 & VOUT2
Typ
Max
Units
–1.0
+1.0
%
–2.0
+2.0
%
VIN Line Regulation
VIN = VOUT +1V to 5.5V, VBIAS = 5.5V
0.02
0.3
%/V
VBIAS Line Regulation
VBIAS = 3.6V to 5.5V, VIN = VOUT +1V
0.02
0.3
%/V
Load Regulation
IOUT = 100µA to 300mA
0.4
1.0
%
Dropout Voltage
IOUT = 150mA
40
100
mV
IOUT = 300mA
85
200
mV
VEN1 = High; VEN2 = Low; IOUT1 = 100µA to 300mA
7
12
µA
VEN1 = Low; VEN2 = High; IOUT2 = 100µA to 300mA
7
12
µA
Ground Pin Current VBIAS
IOUT1 = IOUT2 = 100µA to 300mA
30
46
µA
Ground Pin Current in
Shutdown
VEN ≤ 0.2V
0.01
1.0
µA
VIN Ripple Rejection
f = 1kHz; COUT = 1.0µF; CBYP = 0.01µF
65
dB
f = 20kHz; COUT = 1.0µF; CBYP = 0.01µF
40
dB
550
mA
30
µVRMS
Ground Pin Current VIN1,VIN2
Current Limit
VOUT = 0V
350
Output Voltage Noise
COUT = 1µF, CBYP = 0.01µF, 10Hz to 100kHz
Enable
Enable Input Voltage
Logic Low
0.2
Logic High
Enable Input Current
Turn-on Time
V
V
1.2
VIL ≤ 0.2V
0.02
1
µA
VIH ≥ 1.2V
0.2
1
µA
COUT = 1µF; CBYP = 0.01µF
150
300
µs
POR2 Output
VTH
Low Threshold, % of VOUT2 (Flag ON)
88
%
High Threshold, % of VOUT2 (Flag OFF)
VOL
POR2 Output Logic Low Voltage; IL = 250µA
IPOR2
Flag Leakage Current, Flag OFF
July 2008
3
–1
98
%
0.02
0.1
V
0.01
+1
µA
M9999-070208-A
Micrel, Inc.
Parameter
MIC5314
Condition
Min
Typ
Max
Units
CSET2 Pin Current Source
VCSET2 = 0V
0.8
1.4
2
µA
CSET2 Pin Threshold
Voltage
POR2 = High
1.212
1.25
1.288
V
CSET2 INPUT
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 TA (ambient temperature) is PD(max) = TJ(max) – TA) / θJA. 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
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M9999-070208-A
Micrel, Inc.
MIC5314
Typical Characteristics
Power Supply
Rejection Ratio (V IN)
Power Supply
Rejection Ratio (V BIAS)
150mA
16
150mA
Ground Current (V IN)
vs. Temperature
15
14
300mA
13 VIN = VOUT +1V
300mA
VIN = VOUT +1V
VOUT = 1.8V
COUT = 1µF
CBYP = 10nF
VIN = VOUT +1V
VOUT = 1.8V
COUT = 1µF
CBYP = 10nF
0
10
16.0
100
1k
10k 100k
FREQUENCY (Hz)
1M
Ground Current (V IN)
vs. Output Current
VIN = VOUT +1V
VBIAS = 3.6V
VOUT1 = 1.5V
VOUT2 = 1.2V
COUT = 1µF
CBYP = 10nF
15.5
15.0
14.5
14.0
13.5
0
10
30
120
100
Dropout Voltage
vs. Temperature
80
40
VOUT = 1.5V
COUT = 1µF
150mA
27
24
0
0.10
0.09
10mA
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Output Voltage
vs. Output Current
1.65
0
0
2.0
1.8
1.0
0.8
July 2008
50 100 150 200 250 300
OUTPUT CURRENT (mA)
Ground Current (V IN)
vs. Input Voltage
300mA
10mA
VBIAS = 3.6V
VOUT1 = 1.5V
VOUT2 = 1.2V
COUT = 1µF
CBYP = 10nF
12
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
1.70
Output Voltage
vs. Temperature
1.65
1.60
1.50
VBIAS = 3.6V
VOUT = 1.8V
COUT = 1µF
0.02
0.01
1.2
1.30
0
Dropout Voltage
vs. Load Current
13
1.45
1.50
1.35
50 100 150 200 250 300
OUTPUT CURRENT (mA)
14
0.05
0.04
1.55
VIN = VOUT +1V
VBIAS = 3.6V
VOUT = 1.5V
COUT = 1µF
16
1.55
1.6
1.4
1.40
10
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
0.07
0.06
1.60
1.45
VIN = VOUT +1V
VBIAS = 3.6V
VOUT1 = 1.5V
VOUT2 = 1.2V
COUT = 1µF
CBYP = 10nF
0.03
20
1.70
Ground Current (V BIAS)
vs. Output Current
0.08
300mA
60
1M
15
25
50 100 150 200 250 300
OUTPUT CURRENT (mA)
IOUT1 = IOUT2 = 300mA
100
1k
10k 100k
FREQUENCY (Hz)
28
26
12.5
VOUT2 = 1.2V
COUT = 1µF
11 C
BYP = 10nF
29
13.0
12.0
0
VBIAS = 3.6V
12 VOUT1 = 1.5V
50 100 150 200 250 300
LOAD CURRENT (mA)
Output Voltage
vs. Input Voltage
1.8V
1.1V
1.40
1.35
VIN = VOUT +1V
VBIAS = 3.6V
EN = VIN
VOUT = 1.5V
COUT = 1µF
1.30
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
650
630
Current Limit
vs. Input Voltage
610
590
570
550
530
VBIAS = 5.5V
IOUT = 10mA
COUT1 = 1µF
COUT2 = 1µF
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)
5
510
490
VBIAS = 5.5V
VOUT = 1.5V
COUT = 1µF
470
450
1.5 2 2.5 3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
M9999-070208-A
Micrel, Inc.
MIC5314
Typical Characteristics (continued)
1
Output Noise
Spectral Density
0.1
0.01
COUT = 1µF
CBYP = 10nF
0.001
10
July 2008
100
1k
10k 100k
FREQUENCY (Hz)
1M
6
M9999-070208-A
Micrel, Inc.
MIC5314
Functional Characteristics
July 2008
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Micrel, Inc.
MIC5314
Functional Characteristics (continued)
July 2008
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Micrel, Inc.
MIC5314
Functional Diagram
THERMAL
LIMIT
REFERENCE
QUICK START
CBYP
EN1
VIN1
VBIAS
LDO1
VOUT1
CSET2
CURRENT
LIMIT
DELAY
POR2
EN2
VIN2
LDO2
POR2
VOUT2
GND
MIC5314 Block Diagram
July 2008
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M9999-070208-A
Micrel, Inc.
MIC5314
50% and 60%, respectively, over their operating
temperature ranges. To use a ceramic chip capacitor
with Y5V dielectric, the value must be much higher than
an X7R ceramic capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
Application Information
The MIC5314 is a high performance, dual low input
voltage, ultra-low dropout regulator designed for
applications requiring very fast transient response. The
MIC5314 utilizes two input supplies (VIN and VBIAS),
significantly reducing the dropout voltage.
The MIC5314 regulator is fully protected from damage
due to fault conditions, offering linear current limiting and
thermal shutdown.
Bypass Capacitor
A capacitor can be placed from the bypass pin-to-ground
to reduce the output voltage noise. The capacitor
bypasses the internal reference. A 0.01µF capacitor is
recommended for applications that require low-noise
outputs. The bypass capacitor can be increased, further
reducing noise and improving PSRR. Turn-on time
increases slightly with respect to the bypass
capacitance. A unique, quick-start circuit allows the
MIC5314 to drive a large capacitor on the bypass pin
without significantly slowing turn-on time.
Bias Supply Voltage
VBIAS, requiring relatively light current, provides power to
the control portion of the MIC5314. Bypassing on the
bias pin is recommended to improve performance of the
regulator during line and load transients. A 1µF ceramic
capacitor from VBIAS-to-ground is recommended to help
reduce the high frequency noise from being injected into
the control circuitry.
No-Load Stability
Unlike many other voltage regulators, the MIC5314 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
Input Supply Voltage
VIN1 and VIN2, provide the supply to power the LDOs
independently. The minimum input voltage is 1.7V
allowing conversion from low voltage supplies. The low
input voltage provides high efficiency by reducing the
input to output voltage step which minimizes the
regulator power loss.
Enable/Shutdown
The MIC5314 is provided with dual active-high enable
pins that allow each regulator to be disabled
independently. Forcing the enable pin low disables the
regulator and sends it into a “zero” off-mode-current
state. In this state, current consumed by the regulator
goes nearly to zero. Forcing the enable pin high enables
the output voltage. The active-high enable pin uses
CMOS technology and the enable pin cannot be left
floating; a floating enable pin may cause an
indeterminate state on the output.
Input Capacitor
The MIC5314 is a high-performance, high bandwidth
device. Therefore, it requires a well-bypassed input
supply for optimal performance. A 1µF capacitor is
required from the input-to-ground to provide stability.
Low-ESR
ceramic
capacitors
provide
optimal
performance at a minimum of space. Additional highfrequency capacitors, such as small-valued NPO
dielectric-type capacitors, help filter out high-frequency
noise and are good practice in any RF-based circuit.
X5R or X7R dielectrics are recommended for the input
capacitor. Y5V dielectrics lose most of their capacitance
over temperature and are therefore, not recommended.
Power On Reset
The second regulator (LDO2) provides a Power On
Reset (POR2) status pin. This pin is an open drain
output. When LDO2 is enabled an active low POR2
indicates an under voltage condition on VOUT2.
The POR2 status signal can be programmed for a delay
(1sec/µF) by adding a capacitor from the CSET2 pin to
ground. Zero delay is added by leaving the CSET2 pin
open circuit.
Output Capacitor
The MIC5314 requires an output capacitor of 1µF or
greater to maintain stability. The design is optimized for
use with low-ESR ceramic chip capacitors. High ESR
capacitors may cause high frequency oscillation. The
output capacitor can be increased, but performance has
been optimized for a 1µF ceramic output capacitor and
does not improve significantly with larger capacitance.
X7R/X5R dielectric-type ceramic capacitors are
recommended
because
of
their
temperature
performance. X7R-type capacitors change capacitance
by 15% over their operating temperature range and are
the most stable type of ceramic capacitors. Z5U and
Y5V dielectric capacitors change value by as much as
July 2008
Thermal Considerations
The MIC5314 is designed to provide 300mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature can
be calculated based upon the output current and the
voltage drop across the part. Given that the input voltage
is 1.8V, the output voltage is 1.5V for VOUT1, 1.0V for
VOUT2 and the output current = 300mA for each output.
The actual power dissipation of the regulator circuit can
10
M9999-070208-A
Micrel, Inc.
MIC5314
be determined using the equation:
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I OUT2 + VBIAS IGND
Because this device is CMOS and the ground current is
typically <100µA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
PD = (1.8V – 1.5V) × 300mA + (1.8V – 1.0V) × 300mA
PD = 0.33W
To determine the maximum ambient operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit.
The maximum power dissipation must not be exceeded
for proper operation.
For example, when operating the MIC5314-FCYMT at
an input voltage of 1.8V and 300mA, loads at each
output with a minimum footprint layout, the maximum
ambient operating temperature TA can be determined as
follows:
0.33W = (125°C – TA)/(70°C/W)
TA = 101.9°C
For a full discussion of heat sinking and thermal effects
on voltage regulators, refer to the “Regulator Thermals”
section of Micrel’s Designing with Low-Dropout Voltage
Regulators handbook. This information can be found on
Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
⎛ TJ(MAX) − TA ⎞
⎟
PD(MAX) = ⎜
⎜
⎟
θ
JA
⎝
⎠
TJ(max) = 125°C, the maximum junction temperature of
the die. The junction-to-ambient thermal resistance for
the minimum footprint, is θJA = 70°C/W.
July 2008
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M9999-070208-A
Micrel, Inc.
MIC5314
MIC5314 Typical Application Circuit
U1
MIC5314-xxYMT
VIN
J1
VIN
R1
100k
J3
VBIAS
J4
EN1
J5
EN2
1
VIN1
2
VIN2
3
VBIAS
4
EN1
5
EN2
7
POR2
9
C1
1µF
C2
1µF
VOUT1
CBYP
C4
10nF
GND
8
J2
GND
J7
VO1
12
VOUT2
11
CSET2
6
J8
VO2
C3
0.01µF
C6
1µF
C5
1µF
J9
GND
Bill of Materials
Item
Part Number
Manufacturer
(1)
C1, C2, C5, C6
C1608X5R1A105K
TDK
C3
VJ0603Y104KXACW1BC
Vishay
C4
VJ0603Y103KXACW1BC
R1
CRCW0603100KFKEA
U1
MIC5314-xxYMT
Description
Qty
Capacitor, 1µF Ceramic, 10V, X5R, Size 0603
4
(2)
Capacitor, 0.1µF, 50V, X7R, Size 0603
1
(2)
Capacitor, 0.01µF, 50V, X7R, Size 0603
1
Vishay
(2)
Vishay
Micrel(3)
Resistor, 100kΩ, 1%, 1/16W, Size 0603
1
Low Voltage Dual 300mA LDO with POR
1
Notes:
1.
TDK: www.tdk.com
2.
Vishay: www.vishay.com
3.
Micrel, Inc.: www.micrel.com
July 2008
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M9999-070208-A
Micrel, Inc.
MIC5314
PCB Layout Recommendations
Top Layer
Bottom Layer
July 2008
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M9999-070208-A
Micrel, Inc.
MIC5314
Package Information
®
12-Pin 2.5mm × 2.5mm Thin MLF (MT)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2008 Micrel, Incorporated.
July 2008
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M9999-070208-A
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