MIC5264 [MICREL]
150mA UCap Dual LDO Regulator; 150毫安UCAP双路LDO稳压器
| 型号： | MIC5264 |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 150mA UCap Dual LDO Regulator |
| 文件： | 总10页 (文件大小：327K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5264
150mA µCap Dual LDO Regulator
General Description
Features
•
•
•
•
•
•
•
•
•
•
2.7V to 5.5V supply voltage.
The MIC5264 is a dual 150mA LDO in tiny 2.5mm x
2.5mm MLF™ packaging ideal for applications where cost
is the priority. The MIC5264 is ideal for any application in
portable electronics, including both RF and Digital
applications. With low output noise and high PSRR, the
MIC5264 is ideal for noise sensitive RF applications. While
the fast transient response and active shutdown circuitry
makes it well-suited for powering digital circuitry.
Low 75µA quiescent current per LDO.
Tiny 2.5mm x 2.5mm MLF™ package.
Low Noise – 57µVrms.
High PSRR – 60dB at 1kHz.
Low dropout voltage – 210mV at 150mA.
Stable with ceramic output capacitors.
Independent enable pins.
Fast transient response.
Active shutdown on both outputs.
The MIC5264 has a 2.7V to 5.5V input operating voltage
range, making it ideal for operation from a single cell
lithium ion battery or fixed 3.3V and 5V systems. Each
LDO is completely independent and can be powered
independently, making it easier to use in distributed power
applications.
Applications
•
•
•
Cellular Telephones
PDAs
GPS Receivers
The MIC5264 offers low dropout voltage (210mV at
150mA), low output noise (57µVrms), high PSRR and
integrates an active shutdown circuit on the output of each
regulator to discharge the output voltage when disabled.
Data sheets and supporting documentation can be found
on Micrel’s web site at: www.micrel.com
Typical Application
Power Supply
Rejection Ratio
MIC5264-xxYML
-80
-70
-60
-50
-40
-30
VIN 1
OUT 1
OUT 2
Rx/Synth
Tx
VIN 2
EN 1
EN 2
1µF
1µF
RF
Transceiver
1µF
BYP1
BYP2
GND
0.01µF
0.01µF
-20 VIN = VOUT + 1V
VOUT = 3.0V
BYP = 0.1µF
COUT = 1µF
-10
0
0.01 0.1
1
10
100 1000
FREQUENCY (kHz)
RF Power Supply
MicroLeadFrame and MLF are 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
M9999-041505
(408) 955-1690
April 2005
Micrel, Inc.
MIC5264
Ordering Information
Part Number
Junction Temp.
Range
Marking
Code
Package
Pb-Free
Vo1/Vo2
Full
Manufacturing
2.8V/1.5V
2.8V/2.8V
2.85V/2.85V
3.0V/1.8V
3.0V/2.8V
3.0V/3.0V
MAMF
MAMM
MANN
MAPG
MAPM
MAPP
–40°C to +125°C
2.5mm x 2.5mm MLF™
2.5mm x 2.5mm MLF™
2.5mm x 2.5mm MLF™
2.5mm x 2.5mm MLF™
2.5mm x 2.5mm MLF™
2.5mm x 2.5mm MLF™
MIC5264-2.8/1.5YML
MIC5264-2.8/2.8YML
MIC5264-2.85/2.85YML
MIC5264-3.0/1.8YML
MIC5264-3.0/2.8YML
MIC5264-3.0/3.0YML
MIC5264-MFYML
MIC5264-MMYML
MIC5264-NNYML
MIC5264-PGYML
MIC5264-PMYML
MIC5264-PPYML
–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
Note:
1. Other Voltage Combinations available. Contact Micrel for details.
Pin Configuration
GND1
IN1
1
2
3
4
5
10 EN1
9
8
7
6
BYP1
OUT1
BYP2
EN2
OUT2
IN2
GND2
2.5mm × 2.5mm MLF-10L (ML)
Pin Description
Pin Number
Pin Name
GND1
IN1
Pin Function
1
Ground
2
3
4
Supply Voltage
Regulator Output
OUT1
BYP2
Reference Bypass: Connect external 0.01µF <= CBYP <= 1.0µF capacitor to
GND to reduce output noise. Do not leave open.
5
EN2
Enable/Shutdown (Input): CMOS compatible input. Logic high = enable; logic low
= shutdown. Do not leave open.
6
7
8
9
GND2
IN2
Ground
Supply Voltage
Regulator Output
OUT2
BYP1
Reference Bypass: Connect external 0.01µF <= CBYP <= 1.0µF capacitor to
GND to reduce output noise. Do not leave open.
10
EN1
Enable/Shutdown (Input): CMOS compatible input. Logic high = enable; logic low
= shutdown. Do not leave open.
EP
Exposed Pad Exposed Pad. Connect to external ground pins.
2
M9999-041505
(408) 955-1690
April 2005
Micrel, Inc.
MIC5264
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Input Voltage (VIN1/IN2) .............................. 0V to +7V
Enable Input Voltage (V EN1/EN2)............................ 0V to +7V
Power Dissipation (PD)..........................Internally Limited (3)
Junction Temperature (TJ) ...........................-40°C to 125°C
Lead Temperature (soldering, #sec.)...........-55°C to 150°C
Storage Temperature (Ts) .......................................... 260°C
EDS Rating (4).................................................................2kV
Supply Input Voltage (VIN1/IN2) ...................... +2.7V to +5.5V
Enable Input Voltage (VEN1/EN2)............................0V to +VIN
Junction Temperature (TA)........................–40°C to +125°C
Junction Thermal Resistance
MLF-10L (θJA)....................................................75°C/W
Electrical Characteristics(5)
VEN = VIN = VOUT + 1V; IL =100µA; CL = 1.0µF; CBYP = 0.01µF per output; TA = 25°C, bold values indicate –40°C< TA <
+85°C; unless noted.
Parameter
Condition
Min
Typ
Max
Units
Output Voltage Accuracy
IOUT = 100uA
-2
-3
2
3
%
%
Line Regulation
Load Regulation
Dropout Voltage
VIN = VOUT +1V to 5.5V
IOUT = 0.1mA to 150mA
0.05
2
0.2
3
%
%
IOUT = 50mA
IOUT = 150mA
VEN < 0.4V
75
210
0.2
mV
mV
µA
500
2
Quiescent Current
Ground Pin Current (Per
Regulator)
IOUT = 0mA
IOUT = 150mA
75
80
120
150
µA
µA
PSRR (Ripple Rejection)
f = 100Hz, CBYP = 0.1µF, ILOAD = 50mA
f = 1kHz, CBYP = 0.1µF, ILOAD = 50mA
f = 10kHz, CBYP = 0.1µF, ILOAD = 50mA
VOUT = 0V
62
64
64
dB
dB
dB
mA
Current Limit
Output Noise
225
COUT = 1.0µF, CBYP = 0.1µF, f = 10Hz to 100kHz
57
µV (rms)
Enable Input (EN1 and EN2)
Enable Input Logic Low
Enable Input Logic High
VIN = 2.7V to 5.5V, regulator shutdown
VIN = 2.7V to 5.5V, regulator enabled
V
V
0.2
1.6
Enable Input Current
VIL < 0.4V, regulator shutdown
VIH > 1.6V, regulator enabled
0.01
0.01
µA
µA
Thermal Shutdown
Thermal Shutdown Temperature
150
10
°C
°C
Hysteresis
Turn-on/Turn-off Characteristics
Turn-on Time
40
150
µs
Discharge Resistance
500
Ω
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. The θJA of the MIC5264x.xYML (all versions) is
75°C/W on a PC board (see ”Thermal Considerations” section for further details).
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
M9999-041505
(408) 955-1690
April 2005
3
Micrel, Inc.
MIC5264
Typical Characteristics
Power Supply
Power Supply
Power Supply
Rejection Ratio
Rejection Ratio
Rejection Ratio
-70
-60
-50
-40
-30
-20
-10
0
-70
-80
-70
-60
-50
-40
-30
-60
-50
-40
-30
-20
VIN = VOUT + 1V
-20 VIN = VOUT + 1V
VIN = VOUT + 1V
V
OUT = 3.0V
VOUT = 3.0V
VOUT = 3.0V
BYP = 1µF
-10
-10
0
BYP = 0.01µF
COUT = 1µF
BYP = 0.1µF
COUT = 1µF
C
OUT = 1µF
0
10
100
1000
1
10000
10
100000
100 1000
1000000
0.01 0.1
1
10
100 1000
0.01 0.1
1
10
100 1000
0.01 0.1
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
Dropout Voltage
vs. Output Current
Dropout Voltage
vs. Temperature
Dropout Voltage
vs. Temperature
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.30
0.25
0.20
0.15
0.10
0.05
0.00
125°C
150mA
25°C
100mA
-40°C
50mA
10mA
35 60 85 110
Iload = 100µA
VOUT = 3.0V
IN = VOUT + 1
1mA
V
0
25 50
75 100 125 150
-40 -15 10
-40 -15 10
35 60 85 110
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
TEMPERATURE (°C)
Output Voltage
vs. Input Voltage
Ground Pin Current
vs. Output Current
Ground Pin Current
vs. Temperature
83
82
81
80
79
78
77
76
75
74
73
72
3
2.5
2
78
76
74
72
70
68
100µA Load
150µA Load
1.5
1
0.5
VIN = VOUT + 1V
VOUT = 3.0V
Iload = 100µA
0
0
1
2
3
4
5
0
30
60
90
120 150
-40 -10
20
50
80 110
INPUT VOLTAGE(V)
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
Ground Pin Current
vs. Temperature
Ground Pin Current
vs. Input Voltage
Ground Pin Current
vs. Input Voltage
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
95
90
85
80
75
70
65
60
Iload = 100µA
Iload = 150µA
V
OUT = 3.0V
V
OUT = 3.0V
Iload = 150mA
V
IN = VOUT + 1
V
IN = VOUT + 1
-40 -10
20
50
80 110
0
1
2
3
4
5
0
1
2
3
4
5
TEMPERATURE (°C)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
M9999-041505
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April 2005
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Micrel, Inc.
MIC5264
Typical Characteristics (continued)
Short Circuit Current
vs. Input Voltage
Output Noise
Spectral Density
10
1
290
270
250
230
210
0.1
VIN = 4.2V
OUT = 2.8V
190
V
C
0.01
OUT = 1.0µF
170
150
BYP = 0.1µF
IOUT = 150mA
0.001
10
100
1000
10000
100000
1000000
10000000
3
3.5
4
4.5
5
5.5
0.01 0.1
1
10 100 1000 10000
INPUT VOLTAGE (V)
FREQUENCY (kHz)
M9999-041505
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Micrel, Inc.
MIC5264
Functional Characteristics
Load Transient Response
Line Transient Response
5.0V
4.0V
COUT = 1µF Ceramic
CBYP = 0.01µF
IOUT = 150mA
150mA
VOUT = 3.0V
VIN = VOUT + 1V
COUT = 1µF Ceramic
100µA
C
BYP = 0.01µF
VOUT = 3.0V
VIN = VOUT + 1V
Time (400µs/div)
Time (5µs/div)
Shutdown Delay
Enable Pin Delay
CIN = 1µF Ceramic
COUT = 1µF Ceramic
IOUT = 10mA
VOUT = 3.0V
VIN = VOUT + 1V
CIN = 1µF Ceramic
BYP = 0.01µF
C
IOUT = 10mA
VOUT = 3.0V
V
IN = VOUT + 1V
Time (10µs/div)
Time (100µs/div)
M9999-041505
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Micrel, Inc.
MIC5264
Block Diagram
IN1
Startup/
Shutdown
Control
Quickstart/
Noise
Cancellation
Reference
Voltage
BYP1
OUT1
EN1
FAULT
Thermal
Sensor
Current
Amplifier
Error
Amplifier
Under-
voltage
Lockout
ACTIVE SHUTDOWN
GND1
IN2
Startup/
Shutdown
Control
Quickstart/
Noise
Cancellation
Reference
Voltage
BYP2
OUT2
EN2
FAULT
Thermal
Sensor
Current
Amplifier
Error
Amplifier
Under-
voltage
Lockout
ACTIVE SHUTDOWN
GND2
MIC5264 Diagram
M9999-041505
(408) 955-1690
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Micrel, Inc.
MIC5264
increases slightly with respect to bypass capacitance. A
unique quick-start circuit allows the MIC5264 to drive a
large capacitor on the bypass pin without significantly
slowing turn-on time.
Application Information
Enable/Shutdown
The MIC5264 comes with two independent active-high
enable pins that allow the regulator in each output to be
disabled separately. 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. This part is CMOS and the enable pin
cannot be left floating; a floating enable pin may cause
an indeterminate state on the output.
Active Shutdown
The MIC5264 also features an active shutdown clamp,
which is an N-channel MOSFET that turns on when the
device is disabled. This allows the output capacitor and
load to discharge, de-energizing the load.
No-Load Stability
The MIC5264 will remain stable and in regulation with no
load unlike many other voltage regulators. This is
especially important in CMOS RAM keep-alive
applications.
Input Capacitor
The MIC5264 is a high performance, high bandwidth
device. Therefore, it requires well-bypassed input
supplies for optimal performance. A 1uF 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.
Thermal Considerations
The MIC5264 is designed to provide 150mA of
continuous current per output 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
5.0V, the VOUT1 output voltage is 3.0V at 150mA; VOUT2
output voltage is 2.8V at 100mA.
Output Capacitor
The MIC5264 requires capacitors at both outputs for
stability. The design requires 1uF or greater on each
output to maintain stability. The design is optimized for
use with low-ESR ceramic chip capacitors. High ESR
capacitors may cause high frequency oscillation. The
maximum recommended ESR is 300mΩ. The output
capacitor can be increased, but performance has been
optimized for a 1uF ceramic output capacitor and does
not improve significantly with larger capacitance.
The actual power dissipation of the regulator circuit can
be determined using the equation:
PD = (VIN – VOUT) IOUT + VIN IGND
Because this device is CMOS and the ground current is
typically <100uA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
PD = (5.0V-3.0V) x 150mA + (5.0V-2.8V) x 100mA
PD = 0.52W
X7R/X5R dielectric-type ceramic capacitors are
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.
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
−TA
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
J(max)
PD(max)
=
θJA
TJ(max) = 125°C, the max. junction temperature of the die
JA thermal resistance = 63°C/W
Bypass Capacitor
θ
A capacitor can be placed from the noise bypass pin to
ground to reduce output voltage noise. The capacitor
bypasses the internal reference. A 0.01uF 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
M9999-041505
(408) 955-1690
April 2005
8
Micrel, Inc.
MIC5264
MIC5264 Junction-To-Ambient Thermal Resistance
125°C −T
63°C
⎛
⎞
A
0.52W = ⎜
⎟
⎟
⎜
θJA Recommended
⎝
⎠
Package
θJC
Minimum Footprint
TA = 92.24°C
2.5mm x 2.5mm
MLF-10
75°C/W
2°C/W
Therefore, a 3.0V application at 150mA on Ch1 and 2.8V
at 100mA on Ch2 can accept an ambient operating
temperature of 92°C in a 2.5mm x 2.5mm MLF™ 10-
Lead 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 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
63°C/W. The maximum power dissipation must not be
exceeded for proper operation.
For example, when operating the MIC5264PMYML at an
input voltage of 5.0V at 150mA on VOUT1 and 100mA on
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
VOUT2 with a minimum footprint layout, the maximum
ambient operating temperature TA can be determined as
follows:
M9999-041505
(408) 955-1690
April 2005
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Micrel, Inc.
MIC5264
Package Information
10-Pin 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.
© 2005 Micrel, Incorporated.
M9999-041505
(408) 955-1690
April 2005
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