MIC5322-3.0/3.0YMT-TR [MICROCHIP]
DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO6;
| 型号： | MIC5322-3.0/3.0YMT-TR |
| 厂家： | 
MICROCHIP |
| 描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO6 光电二极管 输出元件 |
| 文件： | 总9页 (文件大小：257K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5322
Dual, High Performance 150mA
µCap ULDO™
General Description
Features
The MIC5322 is a tiny Dual Ultra Low-Dropout
(ULDO™) linear regulator ideally suited for those
applications that require high Power Supply Rejection
Ratio (PSRR). It provides a bypass pin to increase
PSRR for noise sensitive portable electronics. The
MIC5322 integrates two high-performance; 150mA
ULDOs into a very compact 1.6mm x 1.6mm leadless
Thin MLF® package with exceptional thermal package
characteristics.
• 2.3V to 5.5V input voltage range
• Ultra-low dropout voltage ULDO™ 35mV @
150mA
• Tiny 6-pin 1.6mm x 1.6mm Thin MLF® leadless
package
• Bypass pin for improved noise performance
• High PSRR – >75dB on each LDO
• Ultra low noise output - > 30µVrms
• Dual 150mA outputs
• µCap stable with 1µF ceramic capacitor
• Low quiescent current – 150µA
• Fast turn-on time – 45µs
The MIC5322 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, very high power supply
rejection, very low output noise and exceptional
thermal package characteristics makes it ideal for
powering RF applications, cellular phones, GPS,
imaging sensors for digital still cameras, PDAs, MP3
players and other portable applications.
• Thermal shutdown protection
• Current Limit protection
Applications
• Mobile phones
• GPS receivers
• Portable media players
• Digital still and video cameras
• PDAs
The MIC5322 ULDO™ is available in fixed-output
voltages in a tiny 6-pin 1.6mm x 1.6mm leadless Thin
MLF® package which is only 2.56mm2 in area, - 30%
less area than the SOT-23, TSOP and MLF® 3x3
packages. Additional voltage options are available.
For more information, contact Micrel marketing
department.
• Portable electronics
Data sheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
Typical Application
MIC5322-x.xYMT
RF
VIN
VOUT 1
VOUT 2
Core
EN
1µF
GPS
Module
BYP
GND
1µF
1µF
0.01µF
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
M9999-051508-B
May 2008
Micrel, Inc.
MIC5322
Ordering Information
Part number
Manufacturing
Marking(1)
Voltage(2)
Junction
Package
Part Number
Temp. Range
MIC5322-2.8/1.5YMT
MIC5322-2.8/1.8YMT
MIC5322-2.85/2.85YMT
MIC5322-3.0/2.8YMT
MIC5322-3.0/2.85YMT
MIC5322-3.0/3.0YMT
MIC5322-MFYMT
MIC5322-MGYMT
MIC5322-NNYMT
MIC5322-PMYMT
MIC5322-PNYMT
MIC5322-PPYMT
VMF
VMG
VNN
VPM
VPN
VPP
2.8V/1.5V
2.8V/1.8V
2.85V/2.85V
3.0V/2.8V
3.0V/2.85V
3.0V/3.0V
–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
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
Notes:
1. Pin 1 identifier = ▲
2. For other voltage options. Contact Micrel Marketing for details.
Pin Configuration
VIN
GND
BYP
1
2
3
6
5
4
VOUT1
VOUT2
EN
6-Pin 1.6mm x 1.6mm Thin MLF® (MT)
Top View
Pin Description
Pin Number
Thin MLF-6
Pin Name
Pin Function
1
2
3
VIN
GND
BYP
Supply Input.
Ground
Reference Bypass: Connect external 0.01µF to GND to reduce output noise.
May be left open.
4
/EN
Enable Input (both regulators): Active Low Input. Logic High = OFF; Logic Low = ON; Do
not leave floating.
5
6
VOUT2
VOUT1
EPAD
Regulator Output – LDO2
Regulator Output – LDO1
HS Pad
Exposed heatsink pad connected to ground internally.
2
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May 2008
Micrel, Inc.
MIC5322
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN).....................................0V to +6V
Enable Input Voltage (V/EN) ..........................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 (V/EN)............................. 0V to VIN
Junction Temperature (TJ) ................. –40°C to +125°C
Junction Thermal Resistance
6-pin 1.6mmx1.6mm Thin MLF® (θJA) ....100°C/W
Electrical Characteristics(5)
VIN = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; V/EN = 0V; COUT1 = COUT2 = 1µF;
CBYP = 0.01µF; 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
VIN = VOUT + 1V to 5.5V; IOUT = 100µA
0.02
0.3
0.6
%/V
%/V
Load Regulation
Dropout Voltage (6)
IOUT = 100µA to 150mA
IOUT = 100µA
0.5
0.1
12
2.0
%
mV
mV
mV
mV
µA
µA
dB
I
I
I
OUT = 50mA
OUT = 100mA
OUT = 150mA
50
75
25
35
100
190
2
Ground Current
V/EN = Low; IOUT1 = 150mA; IOUT2 = 150mA
V/EN = High
150
0.01
75
Ground Current in Shutdown
Ripple Rejection
f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF
f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF
45
dB
Current Limit
VOUT = 0V
300
1.2
550
30
950
0.2
mA
Output Voltage Noise
Enable Inputs (/EN)
Enable Input Voltage
COUT = 1.0µF; CBYP = 0.01µF; 10Hz to 100kHz
µVRMS
Logic Low
Logic High
VIL ≤ 0.2V
VIH ≥ 1.2V
V
V
Enable Input Current
0.01
0.01
1
1
µA
µA
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2)
COUT = 1.0µF; No CBYP
OUT = 1.0µF; CBYP = 0.01µF
40
45
100
100
µs
µs
C
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 it’s nominal VOUT. For outputs below 2.3V,
the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V
3
M9999-051508-B
May 2008
Micrel, Inc.
MIC5322
Functional Diagram
VOUT 1
VOUT 2
VIN
EN
LDO1
LDO2
Enable
Reference
BYP
GND
MIC5322 Block Diagram
4
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May 2008
Micrel, Inc.
MIC5322
Typical Characteristics
Dropout Voltage
vs. Temperature
Power Supply
Rejection Ratio
Dropout Voltage
vs. Output Current
-90
40
35
30
25
20
15
10
5
50
45
40
35
30
25
20
15
10
5
V
C
= 2.8V
= 1µF
OUT
OUT
/EN = Low
-80
-70
-60
150mA
100mA
-50
50mA
-40
V
V
C
C
= V
+1V
50mA
-30
-20
-10
0
IN
OUT
OUT
BYP
OUT
= 2.8V
= 1µF
= 0.1µF
150mA
V
= 2.8V
OUT
100µA
C
OUT
= 1µF
10mA
20 40 60 80
/EN = Low
/EN = Low
0
0
0.1
1
10
100
1,000
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
FREQUENCY (kHz)
TEMPERATURE (°C)
Ground Current
vs. Temperature
Ground Current
vs. Temperature
Ground Current
vs. Output Current
160
155
150
145
140
135
130
125
120
160
155
150
145
140
135
130
125
120
162
158
154
150
146
142
138
100µA
150mA
V
V
= V
OUT
+ 1V
V
V
= V
+ 1V
V
V
= V
+ 1V
IN
OUT
IN
OUT
= 3V
IN
OUT
= 3V
= 2.85V
OUT
OUT
/EN = Low
C
= 1µF
C
= 1µF
OUT
OUT
C
= C
= 1µF
/EN = Low
/EN = Low
OUT1
OUT2
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
Output Voltage
vs. Temperature
Output Voltage
vs. Output Current
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.60
2.55
2.50
2.90
2.85
2.80
2.75
2.70
2.8V
1.5V
V
V
= V
+ 1V
V
V
= V
+ 1V
IN
OUT
IN
OUT
= 2.8V
= 1µF
= 2.8V
= C
OUT
OUT
OUT
OUT1
I
= 100µA
= 1µF
/EN = Low
OUT
C
C
= 1µF
OUT2
C
OUT
/EN = Low
/EN = Low
20 40 60 80
TEMPERATURE (°C)
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
Output Noise
Spectral Density
Output Voltage
vs. Output Current
Current Limit
vs. Input Voltage
10
1
1.60
1.55
1.50
1.45
1.40
610
600
590
580
570
560
550
540
530
520
510
0.1
V
V
C
C
= 3.8V
= 2.8V
= 1µF
IN
OUT
OUT
BYP
V
V
= V
+ 1V
IN
OUT
C
OUT
0.01
= 1.5V
= C
= 1µF
OUT2
/EN = Low
OUT1
/EN = Low
= 0.01µF
/EN = Low
C
OUT
= 1µF
0.001
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
3
3.5
4
4.5
5
5.5
0.01 0.1
1
10 100 1,000 10,000
INPUT VOLTAGE (V)
FREQUENCY (kHz)
5
M9999-051508-B
May 2008
Micrel, Inc.
MIC5322
Functional Characteristics
6
M9999-051508-B
May 2008
Micrel, Inc.
MIC5322
Applications Information
/Enable/Shutdown
Bypass Capacitor
The MIC5322 comes with a single active-low enable
pin that allows both regulators to be disabled
simultaneously. Forcing the enable pin high 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
low enables the output voltages. The active-low
enable pin cannot be left floating since a floating
enable pin may cause an indeterminate state on the
output.
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 MIC5322 to drive a large capacitor on the
bypass pin without significantly slowing turn-on time.
Refer to the Typical Characteristics section of this
datasheet for performance with different bypass
capacitors.
Input Capacitor
The MIC5322 is a high-performance, high bandwidth
device. Therefore optimal performance can be
achieved by providing a well-bypassed input supply. A
1µF capacitor is required from the input-to-ground to
provide stability. Low-ESR ceramic capacitors provide
No-Load Stability
Unlike many other voltage regulators, the MIC5322
will remain stable and in regulation with no load. This
is especially important in CMOS RAM keep-alive
applications.
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.
Thermal Considerations
The MIC5322 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. As an example: Given
that the input voltage is 3.3V, the output voltage is
2.8V for VOUT1, 1.5V for VOUT2 and the output current at
150mA. The actual power dissipation of the regulator
circuit can be determined using the equation:
Output Capacitor
The MIC5322 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.
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) IOUT2+ VIN IGND
Because this device is CMOS and the ground current
is typically <150µA 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 stable
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 = (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-to-
ambient thermal resistance of the device and the
following basic equation:
TJ(MAX) - TA
⎛
⎝
PD(MAX)
=
JA
TJ(max) = 125°C, the maximum junction temperature of
the die θJA thermal resistance = 100°C/W.
The table below shows junction-to-ambient thermal
resistance for the MIC5322 in the Thin MLF® package.
7
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May 2008
Micrel, Inc.
MIC5322
For example, when operating the MIC5322-MFYMT 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
6-Pin 1.6x1.6 Thin MLF®
θJC
100°C/W
2°C/W
Thermal Resistance
0.345W = (125°C – TA)/(100°C/W)
TA = 90.5°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 100°C/W.
Therefore, a 2.8V/1.5V application with 150mA at
each output current can accept an ambient operating
temperature of 90.5°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:
The maximum power dissipation must not be
exceeded for proper operation.
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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M9999-051508-B
May 2008
Micrel, Inc.
MIC5322
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.
© 2007 Micrel, Inc.
9
M9999-051508-B
May 2008
相关型号：
MIC5322-3.0/3.0YMTTR
DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO6, 1.60 X 1.60 MM, ROHS COMPLIANT, PLASTIC, MLF-6
MICROCHIP
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