MIC5350-SGYMT [MICROCHIP]
MIC5350-SGYMT;
| 型号： | MIC5350-SGYMT |
| 厂家： | 
MICROCHIP |
| 描述： | MIC5350-SGYMT |
| 文件： | 总12页 (文件大小：439K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5350
Dual 300mA/500mA LDO
in 2mm x 2mm Thin MLF®
General Description
Features
The MIC5350 is a tiny Dual Ultra Low-Dropout (ULDO™)
linear regulator ideally suited for portable electronics due
to its low output noise. The MIC5350 integrates two high-
performance; 300mA (VOUT1) and 500mA (VOUT2) ULDOs™
into a tiny 2mm x 2mm leadless Thin MLF® package,
which provides exceptional thermal characteristics.
• 2.6V to 5.5V input voltage range
• Ultra-low dropout voltage: 75mV @ 300mA and 125mV
@ 500mA
• Ultra-low output noise: 30µVRMS
• ±2% initial output accuracy
• Tiny 8-pin 2mm x 2mm Thin MLF® leadless package
• Excellent Load/Line transient response
• Fast start-up time: 30µs
The MIC5350 is designed to be stable with small ceramic
output capacitors thereby reducing required board space
and component cost. The combination of extremely low-
drop-out voltage, low output noise and exceptional thermal
package characteristics makes it ideal for powering RF
and noise-sensitive circuitry, cellular phone camera
modules, imaging sensors for digital still cameras, PDAs,
MP3 players and WebCam applications.
• µCap stable with 2.2µF ceramic capacitors
• Thermal shutdown protection
• Low quiescent current: 130µA with both outputs at
maximum load
• Current-limit protection
The MIC5350 ULDO™ is available in fixed-output voltages
in the tiny 8-pin 2mm x 2mm leadless Thin MLF® package
which occupies less than half the board area of a single
SOT23-6 package. Additional voltage options are
available. For more information, contact Micrel marketing.
Applications
• Mobile phones
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
• PDAs
• GPS receivers
• Portable electronics
• Portable media players
• Digital still and video cameras
_________________________________________________________________________________________________________________________
Typical Application
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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June 2010
Micrel, Inc.
MIC5350
Block Diagram
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Micrel, Inc.
MIC5350
Ordering Information
Voltage(V)
Manufacturing
Part Number
Junction Temperature
Range
Part Number
Marking
Package
VOUT1
VOUT2
1.8V
2.8V
1.8V
1.8V
2.8V
MIC5350-2.8/1.8YMT
MIC5350-2.8/2.8YMT
MIC5350-3.0/1.8YMT
MIC5350-3.3/1.8YMT
MIC5350-3.3/2.8YMT
MIC5350-MGYMT
MIC5350-MMYMT
MIC5350-PGYMT
MIC5350-SGYMT
MIC5350-SMYMT
FMG
FMM
FPG
FSG
FSM
2.8V
2.8V
3.0V
3.3V
3.3V
–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 TMLF®
8-Pin 2x2 TMLF®
8-Pin 2x2 TMLF®
8-Pin 2x2 TMLF®
8-Pin 2x2 TMLF®
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
8-Pin 2mm x 2mm TMLF (MT)
TOP VIEW
Pin Description
Pin Number
Pin Name
VIN
Pin Function
Supply Input.
Ground.
1
2
3
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
NC
Not internally connected.
7
8
VOUT2
VOUT1
HS Pad
Regulator Output – LDO2 (500mA output).
Regulator Output – LDO1 (300mA output).
Heatsink Pad internally connected to ground.
EPAD
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MIC5350
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)..................................... +2.6V to +5.5V
Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN
Junction Temperature ...............................–40°C to +125°C
Junction Thermal Resistance
Supply Voltage (VIN)........................................ −0.3V to +6V
Enable Input Voltage (VEN1 , VEN2).....................−0.3V to VIN
Power Dissipation ..................................Internally Limited(3)
Lead Temperature (soldering, 3sec)..........................260°C
Storage Temperature (TS).........................−65°C to +150°C
ESD Rating(4) .................................................................2kV
8-Pin 2mm x 2mm Thin MLF® (θJA) ...................90°C/W
Electrical Characteristics(5)
VIN = VEN1 = VEN2 = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 2.2µF; 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
Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
Output Voltage Accuracy
%
0.3
0.6
Line Regulation
Load Regulation
VIN = VOUT + 1V to 5.5V; IOUT = 100µA
0.05
%/V
%
IOUT1, 2 = 100µA to 300mA
IOUT2 =100µA to 500mA
0.5
0.7
0.1
12
2.0
2.5
I
I
I
I
OUT1, 2 = 100µA
OUT1, 2 = 50mA
OUT1, 2 = 300mA
OUT2 = 500mA
50
200
300
175
175
240
2
Dropout Voltage(6)
mV
75
125
95
VEN1 ≥ 1.2V; VEN2 ≤ 0.2V; IOUT = 0mA to 300mA
Ground Current
VEN1 ≤ 0.2V; VEN2 ≥ 1.2V; IOUT2 = 0mA to 500mA
95
µA
VEN1 = VEN2 = 1.2V; IOUT1 = 300mA, IOUT2 = 500mA
130
0.01
50
Ground Current in Shutdown
Ripple Rejection
VEN1 = VEN2 = 0V
µA
dB
f = 1kHz; COUT = 2.2µF; CBYP = 0.1µF
f = 20kHz; COUT = 2.2µF; CBYP = 0.1µF
VOUT1 = 0V
35
Current Limit
350
550
560
950
30
850
mA
VOUT2 = 0V
1500
Output Voltage Noise
COUT = 2.2µF; CBYP = 0.1µF; 10Hz to 100kHz
µVRMS
Enable Inputs (EN1 / EN2)
Logic Low
Logic High
VIL ≤ 0.2V
VIH ≥ 1.2V
0.2
Enable Input Voltage
Enable Input Current
V
1.2
0.01
0.01
µA
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2) COUT = 2.2µF; 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 1.5kΩ 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 VOUT. For outputs below
2.6V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.6V.
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MIC5350
Typical Characteristics
Ground Current
vs. Output Current
Ground Current
vs. Temperature
Output Voltage
vs. Input Voltage
100
3.6
3.4
3.2
3
140
135
130
125
120
115
110
105
100
95
I
OUT1 = 300mA and IOUT2 = 500mA
100μA
95
90
85
2.8
2.6
2.4
2.2
2
300mA
I
OUT1 = 300mA
1.8
1.6
1.4
V
V
OUT2 = 2.8V
IN = 4.3V
V
OUT1 = 3.3V
C
IN = COUT = 2.2µF
I
OUT2 = 500mA
80
90
0
100
200
300
400
500
2.5
3
3.5
4
4.5
5
5.5
-40 -20
0
20 40 60 80 100 120 140
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
Current Limit
vs. Input Voltage
Output Voltage
vs. Input Voltage
Dropout Voltage vs.
Temperature
3
2.8
180
160
140
120
100
80
1000
100μA
900
800
700
600
500
400
2.6
2.4
2.2
2
V
OUT2 = 500mA
VOUT2
500mA
V
OUT1, 2
= 300mA
1.8
1.6
1.4
60
VOUT1
V
C
OUT2 = 2.8V
IN = COUT = 2.2µF
40
V
OUT1, 2 = 150mA
20
2.5
3
3.5
4
4.5
5
5.5
0
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
-40 -20
0
20
40
60
80 100 120
TEMPERATURE (°C)
Input Voltage(V)
Output Voltage vs.
Output Current
Output Noise Spectral Density
Dropout Voltage vs.
Output Current
10
140
3.6
120
100
80
60
40
20
0
3.4
3.2
3
1
V
OUT1
0.1
2.8
2.6
2.4
V
OUT2
0.01
V
C
V
IN = 4.5V
OUT = 2.2μF
OUT1 = 2.8V
V
C
IN = 4.3V
IN = COUT = 2.2μF
V
V
OUT2 = 2.8V
EN1 = 0.0V
I
LOAD = 75mA
0.001
0
50 100 150 200 250 300 350 400 450 500
10
100
1,000
10,000
100,000 1,000,000 10,000,000
0
50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
FREQUENCY (Hz)
OUTPUT CURRENT (mA)
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Micrel, Inc.
MIC5350
Typical Characteristics (Continued)
Power Supply
Rejection Ratio
-100
-90
-80
-70
10 0 u A
-60
500mA
300mA
-50
-40
-30
V
V
C
IN = 3.8V
OUT2 = 3.3V
OUT = 2.2μF
BYP = 0.1μF
-20
-10
0
C
10
100
1,000
10,000
100,000
1,000,000
10,000,000
FREQUENCY (Hz)
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Micrel, Inc.
MIC5350
Functional Characteristics
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Micrel, Inc.
MIC5350
A unique, quick-start circuit allows the MIC5350 to drive
a large capacitor on the bypass pin without significantly
slowing turn-on time.
Applications Information
Enable/Shutdown
The MIC5350 comes with dual active-high enable pins
that allow each regulator to be enabled independently.
Forcing both enable pins low disables the regulators 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 MIC5350 will
remain stable with no load. This is especially important
in CMOS RAM keep-alive applications.
Thermal Considerations
The MIC5350 is designed to provide 300mA of
continuous current for VOUT1 and 500mA for VOUT2 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, 2.8V for VOUT2 and the output current 300mA and
500mA respectively. The actual power dissipation of the
regulator circuit can be determined using the equation:
Input Capacitor
The MIC5350 is a high-performance, high-bandwidth
device. Therefore, it requires a well-bypassed input
supply for optimal performance. A 2.2µF 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.
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.
Output Capacitor
The MIC5350 requires an output capacitor of 2.2µF 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 2.2µF ceramic output capacitor and
does not improve significantly with larger capacitance.
PD = (3.3V – 2.8V) × 300mA + (3.3V -2.8) ×
500mA
PD = 0.4W
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their superior 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.
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
- T
A
J(MAX)
JA
⎛
⎝
P
=
D(MAX)
TJ(max) = 125°C, the maximum junction temperature of
the die θJA thermal resistance = 90°C/W.
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.
MIC5350
Thermal Resistance
Therefore, a 2.8V/2.8V application with 300mA and
500mA output currents can accept an ambient operating
temperature of 89°C in a 2mm x 2mm 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:
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.
The maximum power dissipation must not be exceeded
for proper operation.
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
For example, when operating the MIC5350-MMYMT at
an input voltage of 3.3V with 300mA on VOUT1 and
500mA on VOUT2 and a minimum footprint layout, the
maximum ambient operating temperature TA can be
determined as follows:
0.4W = (125°C – TA)/(90°C/W)
TA = 89°C
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Micrel, Inc.
MIC5350
Typical Application Schematic
Bill of Materials
Item
C1
Part Number
C1608X5R0J106M
VJ0603Y104KXQ
Manufacturer Description
Qty.
TDK(1)
Vishay(2)
TDK(1)
Vishay(2)
Micrel, Inc.(3)
Capacitor, 10µF Ceramic, 6.3V, X5R, Size 0603
1
1
2
2
1
C2
Capacitor, 0.1µF Ceramic, 10V, X7R, Size 0603
Capacitor, 2.2µF Ceramic, 6.3V, X5R, Size 0603
Resistor, 10kΩ, 1%, 1/16W, Size 0603
C3, C4
R1, R2
U1
C1608X5R0J225M
CRCW06031002FKEYE3
MIC5350-XXYML
Dual 300mA/500mA LDO, 2mm x 2mm Thin MLF®
Notes:
1. TDK: www.tdk.com.
2. Vishay Tel: www.vishay.com.
3. Micrel, Inc.: www.micrel.com.
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Micrel, Inc.
MIC5350
PCB Layout Recommendations
TOP LAYER
BOTTOM LAYER
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Micrel, Inc.
MIC5350
Package Information
8-Pin 2mm x 2mm TMLF (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.
M9999-060410
June 2010
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