Micrel MIC5310-1.8 Dual, 150ma ucap ldo in 2mm x 2mm mlf Datasheet

MIC5310
Dual, 150mA µCap LDO in 2mm x 2mm MLF®
General Description
Features
The MIC5310 is a tiny Dual Ultra Low-Dropout
(ULDO™) linear regulator ideally suited for portable
electronics due to its high power supply ripple
rejection (PSRR) and ultra low output noise. The
MIC5310 integrates two high-performance; 150mA
ULDOs into a tiny 2mm x 2mm leadless MLF®
package, which provides exceptional thermal package
characteristics.
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The MIC5310 is a µCap design which enables
operation with very small ceramic output capacitors
for stability, thereby reducing required board space
and component cost. The combination of extremely
low-drop-out voltage, high power supply rejection and
exceptional thermal package characteristics makes it
ideal for powering RF/noise sensitive circuitry, cellular
phone camera modules, imaging sensors for digital
still cameras, PDAs, MP3 players and WebCam
applications
The MIC5310 ULDO™ is available in fixed-output
voltages in the tiny 8-pin 2mm x 2mm leadless MLF®
package which occupies less than half the board area
of a single SOT-6 package. Additional voltage options
are available. For more information, contact Micrel
marketing department.
2.3V to 5.5V input voltage range
Ultra-low dropout voltage ULDO™ 35mV @ 150mA
High PSRR - >70dB @ 1KHz
Ultra-low output noise: 30µVRMS
±2% initial output accuracy
Tiny 8-pin 2mm x 2mm MLF® leadless package
Excellent Load/Line transient response
Fast start-up time: 30µs
µCap stable with 1µF ceramic capacitor
Thermal shutdown protection
Low quiescent current: 75µA per output
Current limit protection
Applications
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Mobile phones
PDAs
GPS receivers
Portable electronics
Portable media players
Digital still and video cameras
Data sheets and support documentation can be found
on Micrel’s web site at www.micrel.com.
Typical Application
MIC5310-x.xYML
VIN
VOUT 1
Rx/Synth
EN 1
VOUT 2
Tx
EN 2
1µF
BYP
GND
1µF
1µF
RF
Transceiver
0.1µF
RF Power Supply Circuit
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
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MIC5310
Block Diagram
VIN
VOUT 1
LDO1
LDO2
VOUT 2
EN 1
EN 2
Enable
BYP
Reference
GND
MIC5310 Fixed Block Diagram
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MIC5310
Ordering Information
Voltage
Junction
Temperature Range
MIC5310-GFYML
1.8V/1.5V
–40°C to +125°C
MIC5310-2.5/2.5YML
MIC5310-JJYML
2.5V/2.5V
–40°C to +125°C
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
MIC5310-2.6/1.85YML
MIC5310-KDYML
2.6V/1.85V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-2.8/1.5YML
MIC5310-MFYML
2.8V/1.5V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-2.8/1.8YML
MIC5310-MGYML
2.8V/1.8V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-2.8/2.6YML
MIC5310-MKYML
2.8V/2.6V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-2.8/2.8YML
MIC5310-MMYML
2.8V/2.8V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-2.85/2.85YML
MIC5310-NNYML
2.85V/2.85V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-2.9/1.8YML
MIC5310-OGYML
2.9V/1.8V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-2.9/2.9YML
MIC5310-OOYML
2.9V/2.9V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.0/1.8YML
MIC5310-PGYML
3.0V/1.8V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.0/2.6YML
MIC5310-PKYML
3.0V/2.6V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.0/2.85YML
MIC5310-PNYML
3.0V/2.85V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.0/3.0YML
MIC5310-PPYML
3.0V/3.0V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.3/1.8YML
MIC5310-SGYML
3.3V/1.8V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.3/2.6YML
MIC5310-SKYML
3.3V/2.6V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.3/2.8YML
MIC5310-SMYML
3.3V/2.8V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.3/3.0YML
MIC5310-SPYML
3.3V/3.0V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.3/3.2YML
MIC5310-SRYML
3.3V/3.2V
–40°C to +125°C
8-Pin 2x2 MLF®
MIC5310-3.3/3.3YML
MIC5310-SSYML
3.3V/3.3V
–40°C to +125°C
8-Pin 2x2 MLF®
Part number
Manufacturing
Part Number
MIC5310-1.8/1.5YML
Package
Other voltage options available. Contact Micrel for more details.
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MIC5310
Pin Configuration
VIN 1
8
VOUT1
GND 2
7
VOUT2
BYP 3
6
NC
EN2 4
5
EN1
8-Pin 2mm × 2mm MLF (ML)
Top View
Pin Description
Pin Number
MLF-8
Pin Name
Pin Function
1
VIN
Supply Input.
2
GND
Ground
3
BYP
Reference Bypass: Connect external 0.1µF to GND to reduce output noise.
May be left open when bypass capacitor is not required.
4
EN2
Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
5
EN1
Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
6
NC
Not internally connected
7
VOUT2
Regulator Output – LDO2
8
VOUT1
Regulator Output – LDO1
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MIC5310
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN) .....................................0V to +6V
Enable Input Voltage (VEN)...........................0V to +6V
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 (VIN)............................... +2.3V to +5.5V
Enable Input Voltage (VEN).............................. 0V to VIN
Junction Temperature ......................... -40°C to +125°C
Junction Thermal Resistance
MLF-8 (θJA) ............................................... 90°C/W
Electrical Characteristics(5)
VIN = EN1 = EN2 = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF;
CBYP = 0.1µF; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Parameter
Output Voltage Accuracy
Conditions
Min
Typ
Variation from nominal VOUT
-2.0
+2.0
%
-3.0
+3.0
%
0.02
0.3
0.6
%/V
%/V
2.0
VIN = VOUT + 1V to 5.5V; IOUT = 100µA
Load Regulation
IOUT = 100µA to 150mA
0.5
Dropout Voltage (Note 6)
IOUT = 100µA
0.1
IOUT = 50mA
12
IOUT = 100mA
IOUT = 150mA
Ground Current in Shutdown
Ripple Rejection
Units
Variation from nominal VOUT; –40°C to +125°C
Line Regulation
Ground Current
Max
%
mV
50
mV
25
75
mV
35
100
mV
EN1 = High; EN2 = Low; IOUT = 100µA to 150mA
85
120
µA
EN1 = Low; EN2 = High; IOUT = 100µA to 150mA
85
120
µA
EN1 = EN2 = High; IOUT1 = 150mA, IOUT2 = 150mA
150
190
µA
EN1 = EN2 = 0V
0.01
2
µA
f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF
70
dB
f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF
65
dB
300
Current Limit
VOUT = 0V
Output Voltage Noise
COUT = 1.0 µF; CBYP = 0.1µF; 10Hz to 100kHz
550
950
30
mA
µVRMS
Enable Inputs (EN1 / EN2)
Enable Input Voltage
0.2
Logic Low
1.1
Logic High
Enable Input Current
V
V
VIL ≤ 0.2V
0.01
µA
VIH ≥ 1.0V
0.01
µA
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2)
COUT = 1.0µF; CBYP = 0.01F
30
100
µs
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, 1.5k in series with 100pF.
5. Specification for packaged product only.
6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal VOUT. For outputs below
2.3V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V.
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MIC5310
Typical Characteristics
-80
Power Supply
Rejection Ratio
-80
Power Supply
Rejection Ratio
40
-70
-70
35
-60
-60
30
-50
-50
25
-40
-40
20
-30
-30
VIN = 3.6V
-20 VOUT = 3V
COUT = 1µF
-10 CBYP = 0.1µF
IOUT = 150mA
0
0.1
1
10
100
FREQUENCY (kHz)
15
VIN = 3.4V
-20 VOUT = 3V
COUT = 1µF
-10 CBYP = 0.1µF
IOUT = 50mA
0
0.1
1
10
100
FREQUENCY (kHz)
1,000
Ground Current
vs. Temperature
90
88
86
150mA
84
3.20
3.15
3.10
3.05
82
100mA
80
50mA
78
76 100µA
VIN = VOUT + 1V
74
VOUT = 3V
C
OUT = 1µF
72
EN1 = VIN, EN2 = GND
70
20 40 60 80
TEMPERATURE (°C)
3.00
2.95
2.90
2.85
2.80
3.5
Output Voltage
vs. Input Voltage
90
2.5
0.5
0.0
1
600
580
560
540
520
500
480
460
440
1,000
Output Voltage
vs. Temperature
20
10
COUT = 1µF
2
3
4
5
INPUT VOLTAGE (V)
6
Current Limit
vs. Input Voltage
0
10
25 50 75 100 125 150
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
3.0
VIN = VOUT + 1V
VIN = EN1 = EN2
VOUT = 3V
COUT = 1µF
IOUT = 100µA
20 40 60 80
TEMPERATURE (°C)
Dropout Voltage
vs. Temperature
150mA
100mA
30
100µA
3.3
VOUT = 3V
COUT = 1µF
3.1
40
150mA
0
0
3.2
50
COUT = 1µF
420
VEN = VIN
400
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
April 2006
5
60
2.0
1.0
10
VOUT = 3V
80 VIN = EN1 = EN2
70 COUT = 1µF
3.0
1.5
2.75
2.70
Dropout Voltage
vs. Output Current
50mA
10mA
100µA
20 40 60 80
TEMPERATURE (°C)
2.9
2.8
2.7
0
90
88
86
84
82
80
78
76
74
72
70
0
VIN = VOUT + 1V
VOUT = 3V
COUT = 1µF
25 50 75 100 125 150
OUTPUT CURRENT (mA)
Ground Current
vs. Output Current
VIN = VOUT + 1V
VOUT = 3V
VEN1 = VEN2 = VIN
COUT1 = COUT2 = 1µF
25 50 75 100 125 150
OUTPUT CURRENT (mA)
Output Noise
Spectral Density
1
0.1
VIN = 4V
0.01 VOUT = 3V
COUT = 1µF
CBYP = 0.1µF
ILOAD = 60mA
0.001
0.01 0.1
1
10
100 1,000
FREQUENCY (kHz)
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MIC5310
Functional Characteristics
Enable Turn-On
Enable
(2V/div)
Output Voltage
(20mV/div)
Load Transient
VIN = VOUT + 1V
VOUT = 3V
COUT = 1µF
CBYP = 0.1µF
Output Current
(50mA/div)
Output Voltage
(1V/div)
150mA
VIN = VOUT + 1V
VOUT = 3V
COUT = 1µF
CBYP = 0.01µF
10mA
Time (10µs/div)
Time (40µs/div)
5V
4V
VIN = VOUT + 1V
VOUT = 3V
COUT = 1µF
CBYP = 0.1µF
IOUT = 10mA
Output Voltage
(50mV/div)
Input Voltage
(2V/div)
Line Transient
Time (40µs/div)
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MIC5310
Applications Information
low-noise outputs. The bypass capacitor can be
increased, further reducing noise and improving
PSRR. Turn-on time increases slightly with respect to
bypass capacitance. A unique, quick-start circuit
allows the MIC5310 to drive a large capacitor on the
bypass pin without significantly slowing turn-on time.
Enable/Shutdown
The MIC5310 comes with dual active-high enable pins
that allow each regulator to be enabled 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.
No-Load Stability
Unlike many other voltage regulators, the MIC5310
will remain stable and in regulation with no load. This
is especially important in CMOS RAM keep-alive
applications.
Input Capacitor
The MIC5310 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 highfrequency noise and are good practice in any RFbased circuit.
Thermal Considerations
The MIC5310 is designed to provide 150mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature
can be calculated based on the output current and the
voltage drop across the part. Given that the input
voltage is 3.3V, the output voltage is 2.8V for VOUT1,
1.5V for VOUT2 and the output current = 150mA. The
actual power dissipation of the regulator circuit can be
determined using the equation:
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) IOUT2+ VIN IGND
Output Capacitor
The MIC5310 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.
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 = (3.3V – 2.8V) × 150mA + (3.3V -1.5) × 150mA
PD = 0.345W
To determine the maximum ambient operating
temperature of the package, use the junction-toambient thermal resistance of the device and the
following basic equation:
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 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.
PD(MAX) =
TJ(MAX) - TA
JA
TJ(max) = 125°C, the maximum junction temperature of
the die θJA thermal resistance = 90°C/W.
The table below shows junction-to-ambient thermal
resistance for the MIC5310 in different packages.
Bypass Capacitor
A capacitor can be placed from the noise bypass pinto-ground to reduce output voltage noise. The
capacitor bypasses the internal reference. A 0.1µF
capacitor is recommended for applications that require
April 2006
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MIC5310
Package
θJA Recommended
Minimum Footprint
8-Pin 2x2 MLF®
90°C/W
an input voltage of 3.3V and 150mA loads at each
output with a minimum footprint layout, the maximum
ambient operating temperature TA can be determined
as follows:
0.345W = (125°C – TA)/(90°C/W)
TA=93.95°C
Thermal Resistance
The maximum power dissipation must not be
exceeded for proper operation.
Therefore, a 2.8V/1.5V application with 150mA at
each output current can accept an ambient operating
temperature of 93.95°C in a 2mm x 2mm MLF®
package. 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:
For example, when operating the MIC5310-MFYML at
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
Substituting PD for PD(max) and
operating temperature will
operating conditions for the
junction-to-ambient thermal
minimum footprint is 90°C/W.
April 2006
solving for the ambient
give the maximum
regulator circuit. The
resistance for the
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MIC5310
Package Information
8-Pin 2mm x 2mm MLF (ML)
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.
© 2006 Micrel, Inc.
April 2006
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