MIC5310-3.3/2.5YML-TR [MICROCHIP]
FIXED POSITIVE LDO REGULATOR;
| 型号： | MIC5310-3.3/2.5YML-TR |
| 厂家： | 
MICROCHIP |
| 描述： | FIXED POSITIVE LDO REGULATOR |
| 文件： | 总10页 (文件大小：258K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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.
• 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
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
• µCap stable with 1µF ceramic capacitor
• Thermal shutdown protection
• Low quiescent current: 75µA per output
• Current limit protection
Applications
• Mobile phones
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.
• 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
Rx/Synth
Tx
VIN
VOUT 1
VOUT 2
EN 1
EN 2
BYP
RF
Transceiver
1µF
GND
1µF
1µF
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
M9999-082407-B
August 2007
Micrel, Inc.
MIC5310
Block Diagram
VOUT 1
VOUT 2
VIN
LDO1
LDO2
EN 1
EN 2
Enable
Reference
BYP
GND
MIC5310 Fixed Block Diagram
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M9999-082407-B
August 2007
Micrel, Inc.
MIC5310
Ordering Information
Manufacturing
Junction
Part number
Part Number
Marking*
GFZ
GGZ
GWZ
JGZ
Voltage**
1.8V/1.5V
1.8V/1.8V
1.8V/1.6V
2.5V/1.8V
2.5V/2.5V
2.6V/1.85
2.6V/1.8V
2.7V/2.7V
2.8V/1.5V
2.8V/1.8V
2.8V/2.6V
2.8V/2.8V
2.85V/1.85V
2.85V/2.6V
2.85V/2.85V
2.9V/1.5V
2.9V/1.8V
2.9V/2.9V
3.0V/1.8V
3.0V/2.5V
3.0V/2.6V
3.0V/2.8V
3.0V/2.85V
3.0V/3.0V
3.3V/1.5V
3.3V/1.8V
3.3V/2.5V
3.3V/2.6V
3.3V/2.7V
3.3V/2.8V
3.3V/2.85V
3.3V/2.9V
3.3V/3.0V
3.3V/3.2V
3.3V/3.3V
Temperature Range
Package
MIC5310-1.8/1.5YML
MIC5310-1.8/1.8YML
MIC5310-1.8/1.6YML
MIC5310-2.5/1.8YML
MIC5310-2.5/2.5YML
MIC5310-2.6/1.85YML
MIC5310-2.6/1.8YML
MIC5310-2.7/2.7YML
MIC5310-2.8/1.5YML
MIC5310-2.8/1.8YML
MIC5310-2.8/2.6YML
MIC5310-2.8/2.8YML
MIC5310-2.85/1.85YML
MIC5310-2.85/2.6YML
MIC5310-2.85/2.85YML
MIC5310-2.9/1.5YML
MIC5310-2.9/1.8YML
MIC5310-2.9/2.9YML
MIC5310-3.0/1.8YML
MIC5310-3.0/2.5YML
MIC5310-3.0/2.6YML
MIC5310-3.0/2.8YML
MIC5310-3.0/2.85YML
MIC5310-3.0/3.0YML
MIC5310-3.3/1.5YML
MIC5310-3.3/1.8YML
MIC5310-3.3/2.5YML
MIC5310-3.3/2.6YML
MIC5310-3.3/2.7YML
MIC5310-3.3/2.8YML
MIC5310-3.3/2.85YML
MIC5310-3.3/2.9YML
MIC5310-3.3/3.0YML
MIC5310-3.3/3.2YML
MIC5310-3.3/3.3YML
Notes
MIC5310-GFYML
MIC5310-GGYML
MIC5310-GWYML
MIC5310-JGYML
MIC5310-JJYML
MIC5310-KDYML
MIC5310-KGYML
MIC5310-LLYML
MIC5310-MFYML
MIC5310-MGYML
MIC5310-MKYML
MIC5310-MMYML
MIC5310-NDYML
MIC5310-NKYML
MIC5310-NNYML
MIC5310-OFYML
MIC5310-OGYML
MIC5310-OOYML
MIC5310-PGYML
MIC5310-PJYML
MIC5310-PKYML
MIC5310-PMYML
MIC5310-PNYML
MIC5310-PPYML
MIC5310-SFYML
MIC5310-SGYML
MIC5310-SJYML
MIC5310-SKYML
MIC5310-SLYML***
MIC5310-SMYML
MIC5310-SNYML
MIC5310-SOYML
MIC5310-SPYML
MIC5310-SRYML
MIC5310-SSYML
–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
–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
–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
–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
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
8-Pin 2x2 MLF®
JJZ
KDZ
KGZ
LLZ
MFZ
MGZ
MKZ
MMZ
NDZ
NKZ
NNZ
OFZ
OGZ
OOZ
PGZ
PJZ
PKZ
PMZ
PNZ
PPZ
SFZ
SGZ
SJZ
SKZ
SMZ
SNZ
SOZ
SPZ
SRZ
SSZ
*
Over bar symbol ( ¯ ) may not be to scale. Over bar at Pin 1.
** Other voltage options available. Contact Micrel for more details.
*** Contact Micrel Marketing for availability.
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August 2007
Micrel, Inc.
MIC5310
Pin Configuration
VIN
GND
BYP
EN2
1
2
3
4
8
7
6
5
VOUT1
VOUT2
NC
EN1
8-Pin 2mm x 2mm MLF (ML)
Top View
Pin Description
Pin Number
Pin Name
VIN
Pin Function
1
2
3
Supply Input.
Ground
GND
BYP
Reference Bypass: Connect external 0.1µF to GND to reduce output noise.
May be left open when bypass capacitor is not required.
4
5
EN2
EN1
Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
6
7
8
NC
Not internally connected
Regulator Output – LDO2
Regulator Output – LDO1
VOUT2
VOUT1
4
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August 2007
Micrel, Inc.
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
Conditions
Min
-2.0
-3.0
Typ
Max
+2.0
+3.0
Units
%
Output Voltage Accuracy
Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
%
Line Regulation
Load Regulation
VIN = VOUT + 1V to 5.5V; IOUT = 100µA
0.02
0.3
0.6
%/V
%/V
IOUT = 100µA to 150mA
IOUT = 100µA
0.5
0.1
12
2.0
%
Dropout Voltage (Note 6
)
mV
mV
mV
mV
µA
µA
µA
µA
dB
dB
I
I
I
OUT = 50mA
OUT = 100mA
OUT = 150mA
50
75
25
35
100
120
120
190
2
Ground Current
EN1 = High; EN2 = Low; IOUT = 100µA to 150mA
EN1 = Low; EN2 = High; IOUT = 100µA to 150mA
EN1 = EN2 = High; IOUT1 = 150mA, IOUT2 = 150mA
EN1 = EN2 = 0V
85
85
150
0.01
70
Ground Current in Shutdown
Ripple Rejection
f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF
f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF
65
Current Limit
VOUT = 0V
300
1.1
550
30
950
0.2
mA
Output Voltage Noise
Enable Inputs (EN1 / EN2)
Enable Input Voltage
COUT = 1.0 µF; CBYP = 0.1µF; 10Hz to 100kHz
µVRMS
Logic Low
Logic High
VIL ≤ 0.2V
VIH ≥ 1.0V
V
V
Enable Input Current
0.01
0.01
µA
µA
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2)
COUT = 1.0µF; CBYP = 0.01µF
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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M9999-082407-B
August 2007
Micrel, Inc.
MIC5310
Typical Characteristics
Power Supply
Rejection Ratio
Power Supply
Rejection Ratio
Dropout Voltage
vs. Output Current
-80
-80
-70
-60
-50
-40
-30
-20
-10
0
40
35
30
25
20
15
10
5
-70
-60
-50
-40
-30
V
V
= 3.4V
V
V
= 3.6V
IN
IN
= 3V
= 3V
OUT
OUT
-20
-10
0
C
C
I
= 1µF
= 0.1µF
C
C
I
= 1µF
= 0.1µF
OUT
BYP
OUT
BYP
V
= 3V
= 1µF
OUT
= 50mA
= 150mA
C
OUT
OUT
OUT
0
0.1
1
10
100
1,000
0.1
1
10
100
1,000
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
FREQUENCY (kHz)
FREQUENCY (kHz)
Ground Current
vs. Temperature
Output Voltage
vs. Temperature
Output Voltage
vs. Output Current
90
88
86
84
82
80
78
76
74
72
70
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
2.75
2.70
3.3
3.2
3.1
3.0
2.9
2.8
2.7
150mA
100mA
50mA
V
V
V
= V
+ 1V
IN
IN
OUT
100µA
= EN1 = EN2
= 3V
V
V
= V
+ 1V
IN
OUT
V
V
= V
+ 1V
= 3V
IN
OUT
= 3V
OUT
OUT
OUT
C
I
= 1µF
C
= 1µF
OUT
OUT
C
= 1µF
= 100µA
EN1 = V EN2 = GND
OUT
OUT
IN,
20 40 60 80
TEMPERATURE (°C)
20 40 60 80
TEMPERATURE (°C)
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
Output Voltage
vs. Input Voltage
Dropout Voltage
vs. Temperature
Ground Current
vs. Output Current
3.5
90
80
70
60
50
40
30
20
10
0
90
88
86
84
82
80
78
76
74
72
70
V
V
= 3V
= EN1 = EN2
= 1µF
OUT
IN
3.0
2.5
2.0
1.5
1.0
0.5
0.0
C
OUT
150mA
100mA
50mA
150mA
100µA
V
V
V
= V
+ 1V
IN
OUT
= 3V
OUT
EN1
= V
= V
IN
EN2
100µA
10mA
C
= 1µF
5
OUT
C
= C
= 1µF
OUT1
OUT2
20 40 60 80
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
1
2
3
4
6
TEMPERATURE (°C)
INPUT VOLTAGE (V)
Current Limit
Output Noise
vs. Input Voltage
Spectral Density
600
580
560
540
520
500
480
460
440
420
400
10
1
0.1
V
V
C
C
I
= 4V
IN
= 3V
0.01
OUT
OUT
BYP
= 1µF
C
V
= 1µF
OUT
EN
= 0.1µF
= 60mA
= V
IN
LOAD
0.001
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
0.01 0.1
1
10
100 1,000
FREQUENCY (kHz)
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August 2007
Micrel, Inc.
MIC5310
Functional Characteristics
Enable Turn-On
Load Transient
V
V
= V + 1V
OUT
IN
= 3V
OUT
C
C
= 1µF
= 0.1µF
OUT
BYP
150mA
V
V
C
= V
+ 1V
OUT
IN
= 3V
OUT
10mA
= 1µF
= 0.01µF
OUT
BYP
C
Time (10µs/div)
Time (40µs/div)
Line Transient
5V
4V
V
V
= V
OUT
+ 1V
IN
= 3V
OUT
C
C
= 1µF
= 0.1µF
= 10mA
OUT
BYP
I
OUT
Time (40µs/div)
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August 2007
Micrel, Inc.
MIC5310
Applications Information
Enable/Shutdown
Bypass Capacitor
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
A capacitor can be placed from the noise bypass pin-
to-ground to reduce output voltage noise. The
capacitor bypasses the internal reference. A 0.1µF
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
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.
floating;
a floating enable pin may cause an
indeterminate state on the output.
Input Capacitor
No-Load Stability
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 high-
frequency capacitors, such as small-valued NPO
dielectric-type capacitors, help filter out high-
frequency noise and are good practice in any RF-
based circuit.
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.
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
Output Capacitor
voltage is 3.3V, the output voltage is 2.8V for VOUT1
,
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.
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
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.
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature
PD = (3.3V – 2.8V) × 150mA + (3.3V -1.5) × 150mA
PD = 0.345W
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.
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:
T
J(MAX) - TA
⎛
⎝
PD(MAX)
=
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.
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Micrel, Inc.
MIC5310
For example, when operating the MIC5310-MFYML at
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:
θJA Recommended
Minimum Footprint
Package
8-Pin 2x2 MLF®
90°C/W
Thermal Resistance
0.345W = (125°C – TA)/(90°C/W)
TA = 93.95°C
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum
operating conditions for the regulator circuit. The
junction-to-ambient thermal resistance for the
minimum footprint is 90°C/W.
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:
The maximum power dissipation must not be
exceeded for proper operation.
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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M9999-082407-B
August 2007
Micrel, Inc.
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.
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