MIC5303-2.9YMTTR [MICREL]
2.9V FIXED POSITIVE LDO REGULATOR, 0.2V DROPOUT, DSO4, 1.20 X 1.60 MM, ROHS COMPLIANT, MLF-4;
| 型号： | MIC5303-2.9YMTTR |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 2.9V FIXED POSITIVE LDO REGULATOR, 0.2V DROPOUT, DSO4, 1.20 X 1.60 MM, ROHS COMPLIANT, MLF-4 调节器 输出元件 |
| 文件： | 总8页 (文件大小：251K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5303
Single 300mA CMOS
Ultra Small ULDO™
General Description
Features
• Ultra Small 1.2mm x 1.6mm Thin MLF® package
• Low Dropout Voltage: 100mV at 300mA
• Output noise 120µVrms
The MIC5303 is an ultra small, Ultra Low Dropout CMOS
regulator, ULDO™ that is ideal for today’s most demand-
ing portable applications including cellular phone RF
power, camera modules, imaging sensors for digital still
and video cameras, PDAs, portable media players (PMP)
and PC cameras where board space is limited. It offers
extremely low dropout voltage, very low output noise and
can operate from a 2.3V to 5.5V input while delivering up
to 300mA.
• Input voltage range: 2.3V to 5.5V
• 300mA guaranteed output current
• Stable with ceramic output capacitors
• Low quiescent current 85µA total
• 35µs turn-on time
It offers 2% initial accuracy, low ground current (typically
85µA total), thermal and current limit protection. The
MIC5303 can also be put into a zero-off-mode current
state, drawing no current when disabled.
• High output accuracy
– ±2% initial accuracy
– ±3% over temperature
• Thermal shutdown and current limit protection
The MIC5303 is available in the ultra small 4-pin 1.2mm x
1.6mm Thin MLF® package, occupying only 1.92mm2 of
PCB area, a 50% reduction in board area compared to
SC-70 and 2mm x 2mm MLF® packages. It’s operating
junction temperature range is –40°C to +125°C and is
available in fixed output voltages in lead-free (RoHS
compliant) Thin MLF® package.
Applications
• Mobile Phones
• PDAs
• GPS Receivers
• Portable Media Players
• Portable Electronics
• Digital Still & Video Cameras
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Typical Application
Dropout Voltage
vs. Output Current
MIC5303-x.xYMT
150
VIN
EN
VOUT
125
100
75
GND
1µF
1µF
50
25
V
= 2.8V
= 1µF
OUT
C
OUT
0
0
50 100 150 200 250 300
OUTPUT CURRENT (mA)
RF LDO Application
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
M9999-051508-D
May 2008
Micrel, Inc.
MIC5303
Block Diagram
VIN
EN
VOUT
Quick-
Start
VREF
Error
Amp
Thermal
Shutdown
Current
Limit
GND
MIC5303 Block Diagram
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Micrel, Inc.
MIC5303
Ordering Information(1)
Part Number
MIC5303-1.5YMT
MIC5303-1.8YMT
MIC5303-2.1YMT
MIC5303-2.5YMT
MIC5303-2.6YMT
MIC5303-2.8YMT
MIC5303-2.85YMT
MIC5303-2.9YMT
MIC5303-3.0YMT
MIC5303-3.3YMT
Note:
Marking Code
Voltage
1.5V
1.8V
2.1V
2.5V
2.6V
2.8V
2.85V
2.9V
3.0V
3.3V
Temperature 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
–40°C to +125°C
–40°C to +125°C
Package
Lead Finish
1M5
1M8
2M1
2M5
2M6
2M8
2MN
2M9
3M0
3M3
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
4-Pin 1.2mm x 1.6mm Thin MLF®
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
1. Other voltages available. Contact Micrel Marketing for details.
Pin Configuration
EN
1
2
4
3
VOUT
VIN
GND
4-Pin 1.2mm x 1.6mm Thin MLF® (MT)
Pin Description
Pin Number
Pin Name
EN
Pin Function
1
Enable Input. Active High. High = on, low = off. Do not leave floating.
2
GND
Ground
3
4
VIN
Supply Input
VOUT
EPAD
Output Voltage
HS Pad
Exposed heatsink pad connected to ground internally.
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Micrel, Inc.
MIC5303
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)............................................. 0V to +6V
Enable Input (VEN)................................................ 0V to +6V
Power Dissipation(3)...................................Internally Limited
Lead Temperature (soldering, 5 sec.)........................ 260°C
Junction Temperature (TJ) ........................–40°C to +125°C
Storage Temperature (Ts) .........................–65°C to +150°C
Supply voltage (VIN) ..................................... +2.3V to +5.5V
Enable Input (VEN).................................................. 0V to VIN
Junction Temperature (TA)........................–40°C to +125°C
Junction Thermal Resistance
Thin MLF® -4 (θJA) ...........................................173°C/W
Electrical Characteristics(4)
VIN = VOUT + 1V; COUT = 1.0µF; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted.
Parameter
Output Voltage Accuracy Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
VIN = VOUT +1V to 5.5V; IOUT = 100µA
Condition
Min
–2
Typ
Max
Units
%
+2
+3
–3
%
Line Regulation
0.02
0.3
0.6
2.0
%/V
Load Regulation(5)
Dropout Voltage(6)
IOUT = 100µA to 150mA
IOUT = 100µA
0.5
0.1
15
%
mV
mV
mV
mV
µA
I
I
I
OUT = 50mA
OUT = 150mA
OUT = 300mA
35
100
200
120
2
50
100
85
Ground Pin Current(7)
IOUT = 0 to 300mA, EN = High
VEN = 0V
Ground Pin Current in
Shutdown
0.1
µA
Ripple Rejection
f = up to 1kHz; COUT = 1.0µF
f = 1kHz – 20kHz; COUT = 1.0µF
VOUT = 0V
65
42
dB
dB
Current Limit
350
1.1
460
120
850
0.2
mA
Output Voltage Noise
Enable Input
COUT =1µF, 10Hz to 100kHz
µVRMS
Enable Input Voltage
Logic Low
Logic High
VIL < 0.2V
VIH > 1.0V
COUT = 1.0µF
V
V
Enable Input Current
0.01
0.01
35
µA
µA
µs
Turn-on Time
100
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. Specification for packaged product only.
5. Regulation is measured at constant junction temperature using low duty cycle pulse testing, changes in output voltage due to heating effects are
covered by the thermal regulation specification.
6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential.
7. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin
current.
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Micrel, Inc.
MIC5303
Typical Characteristics
Ground Pin Current
vs. Output Current
Ground Pin Current
vs. Supply Voltage
Ground Pin Current
vs. Temperature
100
90
80
70
60
50
40
30
20
10
0
100
90
88
86
84
82
80
78
76
74
72
70
300mA
90
80
70
60
50
40
30
300mA
100µA
100µA
V
V
= V
+ 1V
V
= V
= 2.8V
= 1µF
+ 1V
IN
OUT
IN
OUT
OUT
OUT
20
10
0
= 2.8V
= 1µF
V
OUT
OUT
C
C
20 40 60 80
TEMPERATURE (°C)
3.0
3.5
4.0
4.5
5.0
5.5
0
50 100 150 200 250 300
OUTPUT CURRENT (mA)
SUPPLY VOLTAGE (V)
Power Supply
Rejection Ratio
Dropout Voltage
vs. Temperature
Dropout Voltage
vs. Output Current
-80
-70
-60
-50
-40
-30
-20
-10
0
160
140
120
100
80
150
125
100
75
50mA
V
C
= 2.8V
= 1µF
OUT
OUT
300mA
150mA
300mA
150mA
60
50
40
V
= V
+ 1V
IN
V
OUT
50mA
25
V
= 2.8V
OUT
OUT
= 2.8V
= 1µF
20
OUT
OUT
C
= 1µF
100µA
C
0
0
20 40 60 80
0
50 100 150 200 250 300
OUTPUT CURRENT (mA)
0.1
1
10
100
1,000
TEMPERATURE (°C)
FREQUENCY (kHz)
Output Voltage
vs. Output Current
Output Voltage
vs. Supply Voltage
Output Voltage
vs. Temperature
2.83
2.82
2.81
2.80
2.79
2.78
2.77
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.60
2.55
2.50
100µA
300mA
V
= V
+ 1V
IN
V
OUT
V
V
= V
+ 1V
IN
OUT
= 2.8V
= 1µF
OUT
OUT
= 2.8V
= 1µF
OUT
OUT
C
C
C
= 1µF
5
I
= 100µA
OUT
OUT
20 40 60 80
TEMPERATURE (°C)
0
50 100 150 200 250 300
OUTPUT CURRENT (mA)
0
1
2
3
4
6
SUPPLY VOLTAGE (V)
Current Limit
Output Noise
vs. Input Voltage
Spectral Density
500
490
480
470
460
450
440
430
420
410
400
10
1
0.1
V
= V
+ 1V
0.01
IN
OUT
OUT
OUT
V
= 2.8V
= 1µF
V
= 2.8V
= 1µF
OUT
C
C
OUT
0.001
3.0
3.5
4.0
4.5
5.0
5.5
0.01 0.1
1
10
100 1,000
INPUT VOLTAGE (V)
FREQUENCY (kHz)
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Micrel, Inc.
MIC5303
Functional Characteristics
Enable Turn-On
Load Transient Response
300mA
V
V
= V
+ 1V
OUT
IN
= 2.8V
= 1µF
OUT
C
OUT
V
V
= V
+ 1V
OUT
IN
= 2.8V
= 1µF
OUT
C
OUT
Time (10µs/div)
Time (40µs/div)
Line Transient Response
5V
4V
V
V
= V
+ 1V
OUT
IN
= 2.8V
= 1µF
OUT
C
OUT
I
= 10mA
OUT
Time (40µs/div)
M9999-051508-D
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Micrel, Inc.
MIC5303
The actual power dissipation of the regulator circuit can
be determined using the equation:
Application Information
Enable/Shutdown
PD = (VIN – VOUT) IOUT + VIN IGND
The MIC5303 comes with an active-high enable pin that
allows the regulator to be disabled. 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.
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 = (3.6V – 2.8V) × 300mA
PD = 0.24W
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:
Input Capacitor
The MIC5303 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 perfor-
mance 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.
TJ(MAX) - TA
⎛
⎝
PD(MAX)
=
JA
TJ(max) = 125°C, the maximum junction temperature of
the die θJA thermal resistance = 173°C/W.
The table below shows junction-to-ambient thermal
resistance for the MIC5303 in the 4-pin 1.2mm x 1.6mm
MLF® package.
Output Capacitor
The MIC5303 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.
θJA Recommended
Package
Minimum Footprint
4-Pin 1.2x1.6 MLF®
173°C/W
Thermal Resistance
X7R/X5R dielectric-type ceramic capacitors are
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
173°C/W.
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.
The maximum power dissipation must not be exceeded
for proper operation.
For example, when operating the MIC5303-2.8YML at
an input voltage of 3.6V and 300mA load with a
minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
0.24W = (125°C – TA)/(173°C/W)
TA=83°C
No-Load Stability
Unlike many other voltage regulators, the MIC5303 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
Therefore, a 2.8V application with 300mA of output
current can accept an ambient operating temperature of
83°C in a 1.2mm x 1.6mm 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:
Thermal Considerations
The MIC5303 is designed to provide 300mA of
continuous current. 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 3.6V, the output voltage is 2.8V and
the output current = 300mA.
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
M9999-051508-D
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Micrel, Inc.
MIC5303
Package Information
4-Pin 1.2mm x 1.6mm 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.
© 2006 Micrel, Incorporated.
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