MIC5371-2.8/1.8YMT-TR [MICROCHIP]
FIXED POSITIVE LDO REGULATOR;型号: | MIC5371-2.8/1.8YMT-TR |
厂家: | MICROCHIP |
描述: | FIXED POSITIVE LDO REGULATOR 输出元件 调节器 |
文件: | 总12页 (文件大小:338K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
MIC5370/1
High Performance Dual 150mA LDO
1.6mm x1.6mm Thin MLF®
General Description
Features
The MIC5370/1 is an advanced dual LDO ideal for
powering general purpose portable devices. The
MIC5370/1 provides two independently controlled, high
performance 150mA LDOs in a tiny 1.6mm x 1.6mm Thin
MLF® package.
• 2.5V to 5.5V input voltage range
• Two 150mA output current LDOs
• High output accuracy
–
±2% initial accuracy
• Low quiescent current – 32µA per LDO
• Stable with 1uF ceramic output capacitors
• Independent enable pins
• Low dropout voltage – 155mV at 150mA
• Thermal shutdown protection
• Current limit protection
• Output discharge circuit – MIC5371
• Thin 6-pin 1.6mm x 1.6mm Thin MLF® package
Ideal for battery powered applications, the MIC5370/1
offers 2% initial accuracy, low dropout voltage
(155mV@150mA) and low ground current (typically 32μA
per LDO). The MIC5370/1 can also be put into a zero-off-
mode current state, drawing virtually no current when
disabled.
When the MIC5371 is disabled an internal resistive load is
automatically applied to the output to discharge the output
capacitor. This LDO offers fast transient response and
high PSRR while consuming a minimum operating current.
The MIC5370/1 is available in fixed output voltages in a
lead-free (RoHS compliant) 6-pin 1.6mm x 1.6mm Thin
MLF® package.
Applications
• Camera phones
• Mobile phones
• GPS, PMP, PDAs and handhelds
• Portable electronics
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
MIC5370/1-xxYMT
I/O
VIN
VOUT1
VOUT2
VCORE
EN1
1µF
1µF
1µF
VBAT
EN2
GND
Camera DSP Power Supply Circuit
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
M9999-093008-A
September 2008
Micrel, Inc.
MIC5370/1
Block Diagrams
VOUT1
VOUT2
VIN
LDO1
LDO2
EN1
EN2
ENABLE
REFERENCE
GND
MIC5370 Block Diagram
VOUT1
VOUT2
VIN
LDO1
LDO2
EN1
EN2
ENABLE
AUTO
DISCHARGE
REFERENCE
GND
MIC5371 Block Diagram
M9999-093008-A
September 2008
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Micrel, Inc.
MIC5370/1
Ordering Information
Part Number
Manufacturing
Part Number
Marking
Code
Voltage
Junction
Temp. Range
Package
Lead Finish
MIC5370-3.3/3.3YMT
MIC5370-3.3/3.0YMT
MIC5370-3.3/2.8YMT
MIC5370-3.3/1.8YMT
MIC5370-3.0/3.0YMT
MIC5370-3.0/2.8YMT
MIC5370-2.8/2.8YMT
MIC5370-2.8/1.8YMT
MIC5370-2.8/1.5YMT
MIC5370-2.8/1.2YMT
MIC5370-1.8/1.2YMT
MIC5370-1.2/1.0YMT
MIC5371-3.3/3.3YMT*
MIC5371-3.3/3.0YMT*
MIC5371-3.3/2.8YMT*
MIC5371-3.3/1.8YMT*
MIC5371-3.0/3.0YMT*
MIC5371-3.0/2.8YMT*
MIC5371-2.8/2.8YMT*
MIC5371-2.8/1.8YMT*
MIC5371-2.8/1.5YMT*
MIC5371-2.8/1.2YMT*
MIC5371-1.8/1.2YMT*
MIC5371-1.2/1.0YMT*
MIC5370-SSYMT
MIC5370-SPYMT
MIC5370-SMYMT
MIC5370-SGYMT
MIC5370-PPYMT
MIC5370-PMYMT
MIC5370-MMYMT
MIC5370-MGYMT
MIC5370-MFYMT
MIC5370-M4YMT
MIC5370-G4YMT
MIC5370-4CYMT
MIC5371-SSYMT
MIC5371-SPYMT
MIC5371-SMYMT
MIC5371-SGYMT
MIC5371-PPYMT
MIC5371-PMYMT
MIC5371-MMYMT
MIC5371-MGYMT
MIC5371-MFYMT
MIC5371-M4YMT
MIC5371-G4YMT
MIC5371-4CYMT
8SS
SP8
SM8
SG8
P8P
PM8
MM8
MG8
MF8
J48
3.3V/3.3V
3.3V/3.0V
3.3V/2.8V
3.3V/1.8V
3.0V/3.0V
3.0V/2.8V
2.8V/2.8V
2.8V/1.8V
2.8V/1.5V
2.8V/1.2V
1.8V/1.2V
1.2V/1.0V
3.3V/3.3V
3.3V/3.0V
3.3V/2.8V
3.3V/2.8V
3.0V/3.0V
3.0V/3.0V
2.8V/2.8V
2.8V/1.8V
2.8V/1.5V
2.8V/1.2V
1.8V/1.2V
1.2V/1.0V
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° 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®
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®
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®
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®
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
8G4
84C
9SS
9SP
9SM
9SG
9PP
9PM
9MM
9MG
9MF
9M4
9G4
94C
Note:
1. Other voltages available. Contact Micrel for details.
2. Thin MLF® Pin 1 Identifier = ▲
3. Thin MLF® is a GREEN RoHS compliant package. Level finish is NiPdAu. Mold compound is Halogen Free.
*
MIC5371 offers Auto-Discharge function.
M9999-093008-A
September 2008
3
Micrel, Inc.
MIC5370/1
Pin Configuration
VIN
GND
EN2
1
2
3
6
5
4
VOUT1
VOUT2
EN1
6-Pin 1.6mm x 1.6mm Thin MLF® (MT)
Pin Description
Pin Number
Pin Name
VIN
Pin Function
Supply Input
Ground
1
2
3
GND
EN2
Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
4
EN1
Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
5
6
VOUT2
VOUT1
HS Pad
Regulator Output – LDO2
Regulator Output – LDO1
EPAD
Heatsink Pad internally connected to ground.
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September 2008
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Micrel, Inc.
MIC5370/1
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)........................................ –0.3V to +6V
Enable Voltage (VEN1, VEN2)...............................–0.3V to VIN
Power Dissipation (PD)...........................Internally Limited(3)
Lead Temperature (soldering, 10sec.)....................... 260°C
Junction Temperature (TJ) ........................–40°C to +125°C
Storage Temperature (Ts) .........................–65°C to +150°C
ESD Rating(4)..................................................................2kV
Supply Voltage (VIN)....................................... +2.5V to 5.5V
Enable Voltage (VEN1, VEN2)............................... –0.3V to VIN
Junction Temperature (TJ) ........................–40°C to +125°C
Junction Thermal Resistance
1.6x1.6 Thin MLF-6 (θJA)...................................90°C/W
Electrical Characteristics(5)
VIN = VEN1 = VEN2 = VOUT + 1V; higher of the two regulator outputs; IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF;
TJ = 25°C, bold values indicate –40°C to +125°C, unless noted.
Parameter
Condition
Min
–2.0
–3.0
Typ
Max
+2.0
+3.0
0.3
Units
%
Output Voltage Accuracy
Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
VIN = VOUT +1V to 5.5V, IOUT = 100µA
IOUT = 100µA to 150mA
%
Line Regulation
Load Regulation
Dropout Voltage
0.02
0.3
55
%/V
%
1
IOUT = 50mA
110
310
mV
mV
I
OUT = 150mA
155
Ground Pin Current
VEN1 = High; VEN2 = Low; IOUT = 0mA
32
32
45
45
85
1
µA
µA
µA
µA
VEN1 = Low; VEN2 = High; IOUT = 0mA
VEN1 = VEN2 = High; IOUT1 = IOUT2 = 0mA
VEN1 = VEN2 = 0V
57
Ground Pin Current in
Shutdown
0.05
Ripple Rejection
Current Limit
f = 1kHz; COUT = 1µF
60
325
200
30
dB
mA
VOUT = 0V
200
550
Output Voltage Noise
COUT = 1µF, 10Hz to 100kHz
MIC5371 Only; VEN1 = VEN2 = 0V; VIN = 3.6V
µVRMS
Ω
Auto-Discharge NFET
Resistance
Enable Inputs (EN1/EN2)
Enable Input Voltage
Logic Low
Logic High
VIL ≤ 0.2V
VIH ≥ 1.2V
COUT = 1µF
0.2
V
V
1.2
Enable Input Current
0.01
0.01
50
1
1
µA
µA
µs
Turn-on Time
125
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.
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September 2008
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Micrel, Inc.
MIC5370/1
Typical Characteristics
Power Supply
Rejection Ratio
Output Voltage
vs. Input Voltage
Output Voltage
vs. Output Current
3.0
2.5
2.0
1.5
1.0
0.5
0
2.90
2.85
2.80
2.75
2.70
100µA
LDO1-150mA
LDO1-100µA
50mA
150mA
LDO2-100µA
LDO2-150mA
V
V
C
= V = V
+ 1V
V
OUT1
V
OUT2
= 2.8V
= 1.8V
IN
EN
OUT
V
V
= V = 3.8V
= 1.8V
= 1µF
IN
OUT
C
EN
= 2.8V
OUT
= C
= 1µF
C
IN
= C
=1µF
IN
OUT
OUT
OUT
0
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Ground Current
vs. Input Voltage
Ground Current
vs. Output Current
Ground Current
vs. Temperature
40
80
60
50
40
30
20
10
0
50mA
Dual Output
38
36
34
32
30
28
26
24
22
20
Dual Outputs(100µA)
70
60
50
40
30
20
10
0
150mA
Single Output(50mA)
Single Output(100µA)
Single Output
100µA
V
V
V
= 3.8V
IN
V
V
V
= V = 3.8V
EN
IN
V
V
= V = 2.8V
EN
= 2.8V
= 1.2V
IN
OUT1
OUT2
= 1.8V
= 2.8V
OUT1
OUT2
= 1.8V
OUT2
C
IN
= C
= 1µF
C
IN
= C
= 1µF
C
= C
= 1µF
OUT
OUT
IN
OUT
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
Dropout Voltage
vs. Temperature
Current Limit
vs. Input Voltage
Dropout Voltage
vs. Output Current
250
200
150
100
50
500
400
300
200
100
0
180
CIN = COUT = 1µF
160
140
120
100
80
150mA
LDO2
LDO1
100mA
60
50mA
10mA
40
V
V
= 1.8V
= 2.8V
OUT1
V
= 2.8V
OUT
OUT2
20
C
IN
= C
= 1µF
OUT
C
IN
= C
= 1µF
OUT
0
0
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
-40 -20
0
20 40 60 80 100 120
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
TEMPERATURE (°C)
Enable Voltage
Output Noise
vs. Input Voltage
Spectral Density
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
10
1
EN1 ON
0.1
EN1 OFF
0.01
0.001
V
OUT1
= 2.5V
VIN = 4.5V
C
IN
= C
= 1µF
V
OUT = 1V
OUT
COUT1 = COUT2 1µF
Load = 150mA
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
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September 2008
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Micrel, Inc.
MIC5370/1
Functional Characteristics
M9999-093008-A
September 2008
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Micrel, Inc.
MIC5370/1
Application Information
Enable/Shutdown
MIC5370/1 is a dual 150mA LDO in a small 1.6mm x
1.6mm package.. The MIC5371 includes an auto-
discharge circuit for each of the LDO outputs that are
activated when the output is disabled. The MIC5370/1
regulator is fully protected from damage due to fault
conditions through linear current limiting and thermal
shutdown.
The MIC5370/1 comes with two active-high enable pins
that allow each regulator to be disabled independently.
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.
When disabled the MIC5371 switches a 30Ω (typical)
load on the regulator output to discharge the external
capacitor.
Input Capacitor
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..
The MIC5370/1 is a high-performance, high bandwidth
device. An input capacitor of 1µF 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. X5R or X7R dielectrics
are recommended for the input capacitor. Y5V dielectrics
lose most of their capacitance over temperature and are
therefore, not recommended.
Thermal Considerations
The MIC5370/1 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. For example if the input
voltage is 3.6V, the output voltage is 2.8V for VOUT1, 1.8V
for VOUT2 and the output current = 150mA. The actual
power dissipation of the regulator circuit can be
determined using the equation:
Output Capacitor
The MIC5370/1 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) I OUT2 + 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.
PD = (3.6V – 2.8V) × 150mA + (3.6V - 1.8) × 150mA
PD = 0.39W
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, and the maximum junction temperature
of the die, θJA, thermal resistance = 90°C/W.
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.
No-Load Stability
Unlike many other voltage regulators, the MIC5370/1 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
The maximum power dissipation must not be exceeded
for proper operation.
M9999-093008-A
September 2008
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Micrel, Inc.
MIC5370/1
For example, when operating the MIC5370-MGYMT at
an input voltage of 3.6V and 150mA loads at each output
with a minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
Therefore, a 2.8V/1.8V application with 150mA at each
output current can accept an ambient operating
temperature of 89.9°C in a 1.6mm 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:
0.39W = (125°C – TA)/(90°C/W)
TA = 89.9°C
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
M9999-093008-A
September 2008
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Micrel, Inc.
MIC5370/1
U1
MIC5370/1-xxYMT
J3
VOUT1
J5
6
5
J1
VIN
1
3
VIN
VOUT1
VOUT2
VOUT2
J7
EN1
J8
EN2
4
EN1
EN2
GND
C3
C1
C2
2
1µF/10V
1µF/10V
1µF/10V
J2
J4
GND
GND
J6
GND
Bill of Materials
Item
C1, C2, C3
U1
Part Number
Manufacturer
Murata(1)
Description
Qty.
3
GRM188R60J225KE19D
MIC5370/1-XXYMT
Capacitor, 1µF Ceramic, 10V, X5R, Size 0402
Dual, 150mA LDO, Size 1.6mm x 1.6mm Thin MLF®
Micrel(2)
1
Notes:
1. Murata: www.murata.com
2. Micrel, Inc.: www.micrel.com
M9999-093008-A
September 2008
10
Micrel, Inc.
MIC5370/1
PCB Layout Recommendations
Top Layer
Bottom Layer
M9999-093008-A
September 2008
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Micrel, Inc.
MIC5370/1
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.
© 2008 Micrel, Incorporated.
M9999-093008-A
September 2008
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