MIC5319
500mA µCap Ultra-Low Dropout
High PSRR LDO Regulator
General Description
The MIC5319 is a high-performance, 500mA LDO
regulator, offering extremely high PSRR and very-low
noise while consuming low ground current.
Ideal for battery-operated applications, the MIC5319
features 1% accuracy, extremely low-dropout voltage
(200mV @ 500mA), and low ground current at light load
(typically 90µA). Equipped with a logic-compatible enable
pin, the MIC5319 can be put into a zero-off-mode current
state, drawing no current when disabled.
The MIC5319 is a µCap design operating with very-small
ceramic output capacitors for stability, thereby reducing
required board space and component cost.
The MIC5319 is available in fixed-output voltages and
adjustable output voltages in the super-compact 2mm x
2mm MLF
®
leadless package and thin SOT-23-5 package.
Data sheets and support documentation can be found on
Micrel’s web site at
www.micrel.com.
Features
•
•
•
•
•
•
•
•
Ultra-low dropout voltage 200mV @ 500mA
Input voltage range: 2.5 to 5.5V
Stable with ceramic output capacitor
Low output noise: 40µVrms
Low quiescent current of 90µA total
High PSRR, up to 70dB @1kHz
Fast turn-on-time: 40µs typical
High-output accuracy:
− ±1.0%
initial accuracy
− ±2.0%
over temperature
Thermal-shutdown protection
Current-limit protection
Logic-controlled Enable
Tiny 2mm x 2mm MLF
®
package, 500mA continuous
Thin SOT-23-5 package, 500mA peak
•
•
•
•
•
Applications
•
•
•
•
•
•
Cellular phones
PDAs
Fiber optic modules
Portable electronics
Notebook PCs
Audio Codec power supplies
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
July 2012
M9999-071812
Micrel, Inc.
MIC5319
Ordering Information
Part Number
MIC5319-1.3HYML
MIC5319-1.8YML
MIC5319-1.85YML
MIC5319-2.5YML
MIC5319-2.6YML
MIC5319-2.7YML
MIC5319-2.8YML
MIC5319-2.85YML
MIC5319-2.9YML
MIC5319-3.0YML
MIC5319-3.3YML
MIC5319-5.0YML
MIC5319YML
MIC5319-1.3HYD5
MIC5319-1.8YD5
MIC5319-1.85YD5
MIC5319-2.5YD5
MIC5319-2.6YD5
MIC5319-2.7YD5
MIC5319-2.8YD5
MIC5319-2.9YD5
(3)
MIC5319-3.0YD5
MIC5319-3.3YD5
MIC5319-5.0YD5
Notes:
1.
2.
3.
Under-bar/Over-bar symbols may not be to scale.
For other output voltage options, contact Micrel Marketing.
Contact Micrel Marketing for availability.
Marking
(1)
13H
918
91
J
925
926
927
928
92J
929
930
933
950
9AA
N13H
N918
N91J
N925
N926
N927
N928
N929
N930
N933
N950
Voltage
(2)
(V)
1.375
1.8
1.85
2.5
2.6
2.7
2.8
2.85
2.9
3.0
3.3
5.0
ADJ
1.375
1.8
1.85
2.5
2.6
2.7
2.8
2.9
3.0
3.3
5.0
Junction
Temperature Range
−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
−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
−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
Package
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
6-Pin 2mm
×
2mm MLF
®
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Thin SOT-23-5
Lead Finish
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
July 2012
2
M9999-071812
Micrel, Inc.
MIC5319
Pin Configuration
MIC5319 (Fixed)
6-Pin 2mm
×
2mm MLF (ML)
Top View
MIC5319 (Adjustable)
6-Pin 2mm
×
2mm MLF (ML)
Top View
MIC5319 (Adjustable)
TSOT-23-5 (D5)
Top View
Pin Description
Pin Number
MLF-6
Fixed
1
2
3
4
−
5
6
EP
Pin Number
MLF-6
Adjustable
1
2
3
4
5
−
6
EP
4
−
Pin Number
TSOT-23-5
Fixed
3
2
1
5
−
Pin Name
EN
GND
VIN
VOUT
ADJ
NC
BYP
ePad
Pin Name
Enable Input: Active High. High = ON, Low = OFF. Do not leave
floating.
Ground.
Supply Input.
Output Voltage.
Adjustable Input: Connect to external resistor voltage divider
network.
No connection for fixed voltage parts
Reference Bypass: Connect external 0.1µF to GND for reduced
output noise. May be left open.
Exposed Heatsink Pad connected to ground internally
July 2012
3
M9999-071812
Micrel, Inc.
MIC5319
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
)...................................... 0V to 6V
Enable Input Voltage (V
EN
)..................................... 0V to 6V
Power Dissipation (P
D
) ........................... Internally Limited
(3)
Junction Temperature (T
J
) ........................
−40°C
to
+125°C
Storage Temperature (T
S
).........................
−65°C
to
+150°C
Lead Temperature (soldering, 5sec.)......................... 260°C
ESD Rating
(4)
.................................................................. 3kV
Operating Ratings
(2)
Supply Input Voltage (V
IN
)............................ +2.5V to +5.5V
Enable Input Voltage (V
EN
)..................................... 0V to V
IN
Junction Temperature (T
J
) ........................
−40°C
to
+125°C
Package Thermal Resistance
MLF (θ
JA
) ...........................................................93°C/W
TSOT-23 (θ
JA
) ..................................................235°C/W
Electrical Characteristics
(5)
V
IN
= V
OUT
+1.0V;
C
OUT
= 2.2µF; I
OUT
= 100µA; T
J
= 25°C,
bold
values indicate –40°C to +125°C, unless noted.
Parameter
Output Voltage Accuracy
Feedback Voltage
(ADJ Option)
Line Regulation
Load Regulation
(6)
Dropout Voltage
(7, 8)
Ground Pin Current
(9)
Ground Pin Current in
Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Turn-On Time
Enable Input Voltage
Enable Input Current
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
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 may go into thermal shutdown.
Devices are ESD sensitive. Handling precautions recommended. Human body model.
Specification for packaged product only.
Regulation is measured at constant junction temperature using low duty cycle pulse testing.
Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal V
OUT
. For outputs below 2.5V,
dropout voltage spec does not apply, as part is limited by minimum V
IN
spec of 2.5V. There may be some typical dropout degradation at V
OUT
<3V.
For ADJ option, V
OUT
= 3V for dropout specification.
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.
Condition
Variation from nominal V
OUT
Variation from nominal V
OUT
, I
OUT
= 100mA to 500mA
Min.
−1.0
−2.0
1.2375
1.225
Typ.
Max.
+1.0
+2.0
Units
%
V
%/V
%
mV
µA
µA
dB
mA
µVrms
µs
V
µA
1.25
1.25
0.04
0.1
20
200
90
0.5
70
60
700
40
40
1.2625
1.275
0.3
0.5
40
400
150
V
IN
= V
OUT
+1V
to 5.5V
I
OUT
= 100µA to 500mA
I
OUT
= 50mA
I
OUT
= 500mA
I
OUT
= 0 to 500mA
V
EN
≤
0.2V
f = up to 1kHz; C
OUT
= 2.2µF ceramic; C
BYP
= 0.1 µF
f = 10kHz; C
OUT
= 2.2µF ceramic; C
BYP
= 0.1 µF
V
OUT
= 0V
C
OUT
= 2.2µF; C
BYP
= 0.1 µF; 10Hz to 100kHz
C
OUT
= 2.2µF; C
BYP
= 0.1 µF
Logic Low (Regulator Shutdown)
Logic High (Regulator Enabled)
V
IL
=
≤
0.2V (Regulator Shutdown)
V
IH
=
≥
1.0V (Regulator Shutdown)
1.2
600
100
0.2
0.01
0.01
1
1
July 2012
4
M9999-071812
Micrel, Inc.
MIC5319
Typical Characteristics
July 2012
5
M9999-071812
嵌入式系统
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