MIC5375/6/7/8
High Performance Low Dropout 150mA LDO
General Description
The MIC5375/6/7/8 is an advanced general purpose linear
regulator offering low dropout in an ultra small package.
The MIC5375/6 provides fixed output voltage in a 1mm x
1mm Thin MLF
®
package while the MIC5377/8 provides
adjustable output voltage in a 1.2mm x 1.2mm Thin MLF
®
package. When the MIC5376/8 is disabled an internal
resistive load is automatically applied to the output to
discharge the output capacitor. The MIC5375/6/7/8 is
capable of sourcing 150mA output current with low dropout
making it an ideal solution for any portable electronic
application.
Ideal for battery powered applications, the MIC5375/6/7/8
offers 2% initial accuracy, low dropout voltage (120mV at
150mA), and ground current (typically 29µA). The
MIC5375/6/7/8 can also be put into a zero-off-mode
current state, drawing virtually no current when disabled.
The MIC5375/6 is available in lead-free (RoHS compliant)
1mm x 1mm Thin MLF
®
and SC-70-5. The MIC5377/8 is
available in lead-free (RoHS compliant) 1.2mm x 1.2mm
Thin MLF
®
and SC-70-5.
The MIC5375/6/7/8 has an operating junction temperature
range of –40°C to 125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
4-pin 1mm x 1mm Thin MLF
®
package– MIC5375/6
8-pin 1.2mm x 1.2mm Thin MLF
®
package– MIC5377/8
Low cost 5-Pin SC-70 package
Low dropout voltage – 120mV at 150mA
Input voltage range: 2.5V to 5.5V
150mA guaranteed output current
Stable with 0402 ceramic capacitors as low as 1µF
Low quiescent current – 29µA
Excellent load/line transient response
Fixed output voltages – MIC5375/6
Adjustable output – MIC5377/8
Output discharge circuit – MIC5376/8
High output accuracy
– ±2% initial accuracy
•
Thermal shutdown and current limit protection
•
•
•
•
•
•
•
•
•
•
•
•
•
Applications
•
•
•
•
Mobile phones
Digital cameras
GPS, PDAs, PMP, handhelds
Portable electronics
___________________________________________________________________________________________________________
Typical Application
MIC5375/6-xxYMT
VIN
VOUT
VBAT
1µF
EN
GND
1µF
V
OUT
= 2.8V
Typical Application
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
January 2009
M9999-011309-B
Micrel, Inc.
MIC5375/6/7/8
Block Diagram
VIN
EN
Reference
LDO
Auto
Discharge*
*MIC5376 Only
VOUT
GND
MIC5375/6 Block Diagram
VIN
EN
Reference
LDO
Auto
Discharge*
*MIC5378 Only
VOUT
ADJ
GND
MIC5377/8 Block Diagram
January 2009
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M9999-011309-B
Micrel, Inc.
MIC5375/6/7/8
Ordering Information
Part Number
Marking
Code
Output
Voltage
Temperature Range
Package
Lead Finish
MIC5375-2.8YMT
MIC5375-2.8YC5
MIC5376-2.8YMT*
MIC5376-2.8YC5*
MIC5377YMT
MIC5377YC5
MIC5378YMT*
MIC5378YC5*
Notes:
1.
2.
3.
4.
*
J7
G7J
TT
2T8
AH
AHA
67A
A67
2.8V
2.8V
2.8V
2.8V
ADJ
ADJ
ADJ
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
–40°C to +125°C
4-Pin 1mm x 1mm Thin MLF
®
5-Pin SC-70
4-Pin 1mm x 1mm Thin MLF
5-Pin SC-70
8-Pin 1.2mm x 1.2mm Thin MLF
®
5-Pin SC-70
8-Pin 1.2mm x 1.2mm Thin MLF
®
5-Pin SC-70
®
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Other voltages available. Contact Micrel for details.
Under bar symbol ( _ ) may not be to scale.
Thin MLF
▲
= Pin 1 identifier.
Thin MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
MIC5376/8 offers Auto-Discharge function.
®
®
January 2009
3
M9999-011309-B
Micrel, Inc.
MIC5375/6/7/8
Pin Configuration
EN GND VIN
1
3
2
4
NC
4-Pin 1mm x 1mm Thin MLF
®
(MT)
MIC5375/6 Fixed Output
(Top View)
5
VOUT
5-Pin SC-70 (C5)
MIC5375/6 Fixed Output
ADJ
7
8
1 EN
2 VIN
3
VOUT
EN GND VIN
1
3
2
GND 6
GND
5
4
4
ADJ
5
VOUT
®
8-Pin 1.2mm x 1.2mm Thin MLF (MT)
MIC5377/8 Adjustable Output
(Bottom View)
5-Pin SC-70 (C5)
MIC5377/8 Adjustable Output
Pin Description
Pin No.
MIC5375/6
TMLF 1x1
Pin No.
MIC5375/6
SC-70-5
Pin No.
MIC5377/8
TMLF 1.2x1.2
Pin No.
MIC5377/8
SC-70-5
Pin Function
Pin Name
3
4
1
2
–
–
HS Pad
3
1
5
2
–
4
1
2
3
4,5,6,8
7
–
–
3
1
5
2
4
–
–
EN
VIN
VOUT
GND
ADJ
NC
EPAD
Enable Input. Active High. High = on, low = off. Do not
leave floating.
Supply Input.
Output Voltage.
Ground.
Adjust Pin: Feedback input from external divider.
No connection.
Exposed Heatsink Pad connected to ground internally.
January 2009
4
M9999-011309-B
Micrel, Inc.
MIC5375/6/7/8
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ............................................... 0V to 6V
Enable Voltage (V
EN
).............................................. 0V to V
IN
Power Dissipation (P
D
) ........................... Internally Limited
(3)
Lead Temperature (soldering, 5 sec)......................... 260°C
Junction Temperature (T
J
) ........................–40°C to +125°C
Storage Temperature (T
s
) .........................–65°C to +150°C
ESD Rating
(4)
.................................................................. 2kV
Operating Ratings
(2)
Supply Voltage (V
IN
)......................................... 2.5V to 5.5V
Enable Voltage (V
EN
).............................................. 0V to V
IN
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
1mm x 1mm Thin MLF-4 (θ
JA
) .........................250°C/W
1.2mm x 1.2mm Thin MLF-8(θ
JA
) ....................250°C/W
SC-70-5 (θ
JA
) ................................................256.5°C/W
Electrical Characteristics
(5)
V
IN
= V
EN
= V
OUT
+ 1V; C
IN
= C
OUT
= 1µF for Vout
≥
2.5V, C
IN
= C
OUT
= 2.2µF for V
OUT
< 2.5V; I
OUT
= 100µA; T
J
= 25°C,
bold
values indicate –40°C to +125°C, unless noted.
Parameter
Condition
Min
Typ
Max
Units
Output Voltage Accuracy
Line Regulation
Load Regulation
(6)
Dropout Voltage
(7)
Ground Pin Current
(8)
Ground Pin Current in Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Auto-Discharge NFET
Resistance
Reference Voltage (MIC5377/8)
Variation from nominal V
OUT
Variation from nominal V
OUT
V
IN
= V
OUT
+1V to 5.5V; I
OUT
= 100µA
I
OUT
= 100µA to 150mA
I
OUT
= 50mA
I
OUT
= 150mA
I
OUT
= 0mA
V
EN
≤
0.2V
f = 1kHz; C
OUT
= 1µF
f = 10kHz; C
OUT
= 1µF
V
OUT
= 0V
C
OUT
= 1µF, 10Hz to 100kHz
V
EN
= 0V; V
IN
= 3.6V
–2.0
–3.0
+2.0
+3.0
%
%
%
%
mV
mV
µA
µA
dB
dB
0.02
0.3
45
120
29
0.05
60
50
200
370
200
30
0.3
1.0
100
200
45
1
550
mA
µV
RMS
Ω
Reference Voltage Accuracy
Adjust Pin Input Current
Enable Input
0.97
1
0.01
1.03
V
μA
Enable Input Voltage
Enable Input Current
Turn-on Time
Logic Low
Logic High
V
IL
≤
0.2V
V
IH
≥
1.2V
C
OUT
= 1µF; I
OUT
= 150mA
1.2
0.2
V
V
µA
µA
µs
0.01
0.01
45
1
1
100
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 T
A
(ambient temperature) is P
D(max)
= (T
J(max)
– T
A
) /
θ
JA
. 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. Regulation is measured at constant junction temperature using low duty cycle pulse testing.
7. 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.
For outputs below 2.5V, dropout voltage is the input-to-output differential with the minimum input voltage 2.5V.
8. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin
current.
January 2009
5
M9999-011309-B
单片机
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