MIC5353-1.8YMTTR [MICROCHIP]
1.8V FIXED POSITIVE LDO REGULATOR, 0.35V DROPOUT, PDSO6, 1.60 X 1.60 MM, GREEN, MLF-6;
| 型号： | MIC5353-1.8YMTTR |
| 厂家： | 
MICROCHIP |
| 描述： | 1.8V FIXED POSITIVE LDO REGULATOR, 0.35V DROPOUT, PDSO6, 1.60 X 1.60 MM, GREEN, MLF-6 光电二极管 输出元件 调节器 |
| 文件： | 总12页 (文件大小：450K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5353
500mA LDO in 1.6mm × 1.6mm Package
General Description
Features
The MIC5353 is a high-performance, single-output, ultra-
low LDO (ULDO™) regulator, offering a low total output
noise of 30μVRMS. The MIC5353 is capable of sourcing
500mA output current and offers high-PSRR and low-
output noise, making it an ideal solution for RF
applications.
• 500mA guaranteed output current
• Input voltage range: 2.6V to 6V
• Ultra low dropout voltage: 160mV @ 500mA
• ± 2% initial accuracy
• Ultra low output noise: 30µVrms
• Low quiescent current: 90µA
• Stable with ceramic output capacitors
• 35µs turn-on time
The MIC5353 provides 2% accuracy, extremely low
dropout voltage (160mV @ 500mA), and low ground
current (typically 90µA) making it ideal for battery-operated
applications. When disabled, the MIC5353 enters a zero-
off-mode current state, thereby drawing almost no current.
• Thermal shutdown and current limit protection
• Tiny 6-pin 1.6mm x 1.6mm Thin MLF® leadless package
The MIC5353 is available in the 1.6mm x 1.6mm Thin
MLF® package, occupying only 2.56mm2 of PCB area, a
36% reduction in board area compared to SC-70 and 2mm
x 2mm Thin MLF® packages.
Applications
• Mobile Phones
The MIC5353 has an operating junction temperature range
of –40°C to +125°C and is available in fixed and adjustable
output voltages in lead-free (RoHS-compliant) Thin MLF®
package.
• GPS, PDAs, PMP, handhelds
• Portable electronics
• Digital still and video cameras
• Digital TV
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
_________________________________________________________________________________________________________________________
Typical Application
Portable 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
M9999-052510
May 2010
Micrel, Inc.
MIC5353
Ordering Information
Part Number
Marking Code(1)
Output Voltage(2)
Temperature Range
Package
6-Pin 1.6mm x 1.6mm Thin MLF®
6-Pin 1.6mm x 1.6mm Thin MLF®
6-Pin 1.6mm x 1.6mm Thin MLF®
6-Pin 1.6mm x 1.6mm Thin MLF®
6-Pin 1.6mm x 1.6mm Thin MLF®
6-Pin 1.6mm x 1.6mm Thin MLF®
6-Pin 1.6mm x 1.6mm Thin MLF®
MIC5353-1.8YMT
MIC5353-2.5YMT
MIC5353-2.6YMT
MIC5353-2.8YMT
MIC5353-3.0YMT
MIC5353-3.3YMT
MIC5353YMT
18R
25R
26R
28R
30R
33R
AAR
1.8V
2.5V
2.6V
2.8V
3.0V
3.3V
ADJ
–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
Notes:
1. Pin 1 identifier= “▲”.
2. For other voltage options contact Micrel Marketing.
3. Thin MLF® is a GREEN RoHS compliant package. Lead finish is NiPdAu, Mold compound is Halogen Free.
Pin Configuration
6-Pin 1.6mm × 1.6mm Thin MLF® (MT)
6-Pin 1.6mm × 1.6mm Thin MLF®(MT)
Fixed
Adjustable
(TOP VIEW)
(TOP VIEW)
Pin Description
Pin Number
Thin MLF-6
Fixed
Pin Number
Thin MLF-6
Adjustable
Pin Name
Pin Function
1
2
3
4
5
–
1
2
3
4
–
5
EN
GND
VIN
Enable Input. Active High. High = ON, low = OFF. Do not leave floating.
Ground.
Supply Input.
VOUT
NC
Output Voltage.
No connection.
ADJ
Adjust Input. Connect to external resistor voltage divider network.
Reference Bypass: Connect external 0.1μF to GND for reduced Output Noise. May
be left open.
6
6
BYP
EPad
EPad
HS PAD
Exposed Heat-sink Pad connected to ground internally.
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MIC5353
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)..................................... −0.3V to +6.5V Supply Voltage (VIN) ...................................... +2.6V to +6.0V
Enable Input Voltage (VEN) ......................................0V to VIN
Enable Input Voltage (VEN)................................−0.3V to VIN
Power Dissipation ..................................Internally Limited(3) Junction Temperature (TJ)..........................−40°C to +125°C
Lead Temperature (soldering, 3sec)..........................260°C Junction Thermal Resistance
Storage Temperature (TS).........................−65°C to +150°C
6-Pin 1.6mm x1.6mm Thin MLF® (θJA) ...........92.4°C/W
ESD Rating(4)................................................................. 2KV
Electrical Characteristics(5)
VIN = VOUT + 1.0V; COUT = 1.0µF; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted.
Parameter
Conditions
Min.
-2.0
-3.0
Typ.
Max.
+2.0
+3.0
0.3
Units
Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
Output Voltage Accuracy
%
0.05
Line Regulation
Load Regulation
VIN = VOUT + 1V to 6V; IOUT = 100µA
%/V
%
0.6
IOUT = 100µA to 500mA
IOUT = 150mA
0.15
50
2.0
100
200
350
175
2
Dropout Voltage (6)
mV
IOUT = 300mA
100
160
90
IOUT = 500mA
Ground Pin Current
IOUT = 0 to 500mA
µA
µA
dB
Ground Pin Current in Shutdown
VEN ≤ 0.2V
0.01
60
f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF
f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF
VOUT = 0V
Ripple Rejection
45
Current Limit
600
1100
30
1600
0.2
mA
Output Voltage Noise
Enable Input
COUT = 1.0µF; CBYP = 0.1µF; 10Hz to 100kHz
µVRMS
Logic Low
Logic High
VIL ≤ 0.2V
Enable Input Voltage
Enable Input Current
V
1.2
0.01
0.01
1
1
µA
VIH ≥ 1.2V
Turn-on Time
Turn-on Time
Notes:
COUT = 1.0µF; CBYP = 0.1µF
35
100
µs
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.
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.
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MIC5353
Functional Diagram
MIC5353 Block Diagram – FIXED
MIC5353 Block Diagram – ADJUSTABLE
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MIC5353
Typical Characteristics
Dropout Voltage
vs. Temperature
Ground Current
vs. Output Current
Dropout Voltage
vs. Output Current
92
90
88
86
84
82
80
250
200
150
100
50
200
180
160
140
120
100
80
500mA
300mA
150mA
VOUT = 2.8V
IN = 3.8V
60
V
40
20
0
0
0
100
200
300
400
500
-40 -20
0
20 40 60 80 100 120 140
0
50 100 150 200 250 300 350 400 450 500
Output Current(mA)
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
Ground Current
vs. Temperature
Output Voltage
vs. Input Voltage
1.84
1.83
1.82
1.81
1.8
3.6
3.4
3.2
3
120
110
100
90
100μA
I
= 500mA
OUT
2.8
2.6
2.4
2.2
2
1.79
1.78
1.77
1.76
500mA
80
VIN=2.8V
I
OUT = 100μA
300mA
150mA
V
C
OUT = 2.8V
IN = COUT = 1μF
COUT=CIN=1μF
70
2.6
3
3.4 3.8 4.2 4.6
5
5.4 5.8
0
50 100 150 200 250 300 350 400 450 500
60
-40 -20
0
20 40 60 80 100 120 140
OUTPUT CURRENT(mA)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
Current Limit
Output Noise Spectral Density
vs. Input Voltage
PSRR
1.4
10
1
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
1.3
1.2
1.1
1
500µA
100µA
VOUT =2.8V
CIN=COUT=1μF
0.1
300µA
0.9
0.8
V
C
V
IN = 4.5V
OUT = 1µF
OUT = 1.8V
0.01
0.001
2.5
3
3.5
4
4.5
5
5.5
6
INPUT VOLTAGE(V)
C
OUT = 1µF
C
BYP = 0.1µF
I
LOAD = 50mA
C
BYP = 0.1µF
10
100
1,000
10,000
100,000
1,000,000 10,000,000
10
100
1,000
10,000
100,000
1,000,000 10,000,000
FREQUENCY (Hz)
FREQUENCY (Hz)
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MIC5353
Functional Characteristics
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Micrel, Inc.
MIC5353
A unique, quick-start circuit allows the MIC5353 to drive
a large capacitor on the bypass pin without significantly
slowing turn-on time.
Applications Information
Enable/Shutdown
The MIC5353 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.
No-Load Stability
Unlike many other voltage regulators, the MIC5353 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
Adjustable Regulator Application
Adjustable regulators use the ratio of two resistors to
multiply the reference voltage to produce the desired
output voltage. The MIC5353 can be adjusted from
1.25V to 5.5V by using two external resistors (Figure 1).
The resistors set the output voltage based on the
following equation:
Input Capacitor
The MIC5353 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
R1
R2
⎛
⎞
⎟
performance at a minimum of space. The use of
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.
VOUT = VREF 1+
⎜
⎝
⎠
VREF = 1.25V
Output Capacitor
The MIC5353 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, although
performance has been optimized for a 1µF ceramic
output capacitor and doing so does not improve
significantly with larger capacitance.
Figure 1. Adjustable Voltage Output
Thermal Considerations
X7R/X5R dielectric-type ceramic capacitors are
recommended
because
of
their
temperature
The MIC5353 is designed to provide 500mA 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 3.3V, the output voltage is 2.8V and
the output current = 500mA.
performance. The 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 thereby
ensuring the same minimum capacitance over the
equivalent operating temperature range.
The actual power dissipation of the regulator circuit can
be determined using the equation:
PD = (VIN – VOUT) IOUT + VIN IGND
Bypass Capacitor
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.
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Micrel, Inc.
MIC5353
The maximum power dissipation must not be exceeded
for proper operation.
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:
For example, when operating the MIC5353-2.8YMT at
an input voltage of 3.3V and 500mA load with a
minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
PD = (3.3V – 2.8V) × 500mA
PD = 0.25W
0.25W = (125°C – TA)/(92.4°C/W)
TA=101°C
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:
Therefore, a 2.8V application with 500mA of output
current can accept an ambient operating temperature of
101°C in a 1.6mm x 1.6mm Thin 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:
T
- T
A
J(MAX)
JA
⎛
⎝
P
=
D(MAX)
TJ(max) = 125°C, the maximum junction temperature of
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
the die θJA thermal resistance = 92.4°C/W.
Thermal Resistance
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
92.4°C/W.
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Micrel, Inc.
MIC5353
Typical Application Schematic (Fixed Output)
Bill of Materials
Item
Part Number
Manufacturer
AVX(1)
muRata(2)
AVX(1)
muRata(2)
Micrel, Inc.(3)
Description
Qty.
06036D105KAT2A
GRM188R60J105KE19D
06035C104KAT2A
GRM188R71H104KA93D
MIC5353-XXYMT
C1,C3
Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603
2
C2
Capacitor, 0.1µF Ceramic, 50V, X5R, Size 0603
1
U1
500mA LDO, 1.6mm x 1.6mm Thin MLF®
1
Notes:
1. AVX: www.avx.com.
2. Murata Tel: www.murata.com.
3. Micrel, Inc.: www.micrel.com.
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Micrel, Inc.
MIC5353
Typical Application Schematic (Adjustable Output)
Bill of Materials
Item
Part Number
Manufacturer
AVX(1)
muRata(2)
AVX(1)
muRata(2)
Vishay(3)
Vishay(3)
Description
Qty.
06036D105KAT2A
GRM188R60J105KE19D
06035C104KAT2A
GRM188R71H104KA93D
CRCW060320K0FKEA
CRCW060310K0FKEA
MIC5353YMT
C1,C3
Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603
2
C2
Capacitor, 0.1µF Ceramic, 50V, X5R, Size 0603
1
R1
R2
Resistor, 20kΩ, 1%, 1/16W, Size 0603
1
1
1
Resistor, 10kΩ, 1%, 1/16W, Size 0603
Adjustable 500mA LDO, 1.6mm x 1.6mm Thin MLF®
U1
Micrel, Inc.(4)
Notes:
1. AVX: www.avx.com.
2. Murata Tel: www.murata.com.
3. Vishay Tel: www.vishay.com.
4. Micrel, Inc.: www.micrel.com.
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Micrel, Inc.
MIC5353
PCB Layout Recommendations
TOP LAYER
BOTTOM LAYER
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Micrel, Inc.
MIC5353
Package Information
6-Pin 1.6mm 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.
© 2010 Micrel, Incorporated.
M9999-052510
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相关型号：
MIC5353-3.0YMTTR
3V FIXED POSITIVE LDO REGULATOR, 0.35V DROPOUT, PDSO6, 1.60 X 1.60 MM, GREEN, MLF-6
MICROCHIP
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