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MIC5319
Micrel, Inc.
MIC5319
500mA µCap Ultra-Low Dropout
High PSRR LDO Regulator
General Description
The MIC5319 is a high-performance, 500mA LDO regula-
tor, 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 adjust-
able output voltages in the super-compact 2mm x 2mm MLF
®
leadless package and thin SOT-23-5 package.
Additional voltage options are available. Contact Micrel
marketing.
All 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
Cellular phones
PDAs
Fiber optic modules
Portable electronics
Notebook PCs
Audio Codec power supplies
Dropout Voltage
vs. Output Current
Applications
Typical Application
200
180
160
140
120
100
80
60
40
20
0
MIC5319
V
IN
1µF
VIN VOUT
EN
BYP
GND
0.1µF
2.8V@500mA
V
OUT
2.2µF
Vout = 2.8V
Cout = 2.2µF
0
100
200
300
400
500
OUTPUT CURRENT (mA)
100
90
80
70
60
50
40
30
20
10
0
10
PSRR
(Bypass Pin Cap = 0.1µF)
50mA
100µA
500mA
Vout = 2.8V
Vin = Vout + 1V
Cout = 2.2µF
1k
100
10k 100k
FREQUENCY (Hz)
1M
MicroLeadFrame
and MLF 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
March 2008
1
M9999-032808
MIC5319
Micrel, Inc.
Ordering Information
Part Number
Standard
MIC5319-1.8BML
MIC5319-2.5BML
Pb-Free
MIC5319-1.3HYML
MIC5319-1.8YML
MIC5319-1.85YML
MIC5319-2.5YML
MIC5319-2.6YML
MIC5319-2.7YML
MIC5319-2.8BML
MIC5319-2.8YML
MIC5319-2.9YML
MIC5319-3.0YML
MIC5319-3.3BML
MIC5319-5.0BML
MIC5319BML
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
MIC5319-2.8BD5
MIC5319-2.8YD5
MIC5319-2.9YD5
MIC5319-3.0YD5
MIC5319-3.3BD5
Notes:
1. Under-bar/Over-bar symbols may not be to scale.
2. For other output voltage options, contact Micrel marketing.
Marking
Standard
918
925
Pb-Free
(1)
13H
918
91J
925
926
927
928
928
929
930
933
950
9AA
933
950
9AA
N13H
N918
N91J
N925
N926
N927
N928
N928
N929
N930
N933
N933
N950
Voltage
(2)
1.375V
1.8V
1.85V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.3V
5.0V
ADJ
1.375V
1.8V
1.85V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.3V
5.0V
Junction Temp. Range
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
Package
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 2mm MLF
®
6-pin 2mm x 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
MIC5319-3.3YD5
MIC5319-5.0YD5
March 2008
2
M9999-032808
MIC5319
Micrel, Inc.
Pin Configuration
EN 1
GND 2
VIN 3
6 BYP
5 NC
4 VOUT
EN 1
GND 2
VIN 3
6 BYP
5 ADJ
4 VOUT
MIC5319-x.xBML/YML
6-Pin 2mm x 2mm MLF™ (ML)
(Top View)
EN
GND
VIN
3
MIC5319BML/YML (Adjustable)
6-Pin 2mm x 2mm MLF™ (ML)
(Top View)
2
1
KWxx
4
5
BYP
VOUT
MIC5319-x.xBD5/YD5
TSOT-23-5 (D5)
(Top View)
Pin Description
Pin Number
MLF-6 Fixed
1
2
3
4
–
5
6
HS Pad
Pin Number
MLF-6 Adj.
1
2
3
4
5
–
6
HS Pad
Pin Number
TSOT-23-5 Fixed
3
2
1
5
–
4
–
Pin Name
EN
GND
VIN
VOUT
ADJ
NC
BYP
EPAD
Pin Function
Enable Input. Active High. High = on, low = off. Do not
leave floating.
Ground.
Supply Input.
Output voltage.
Adjust 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.
March 2008
3
M9999-032808
MIC5319
Micrel, Inc.
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, 5 sec.) ........................ 260°C
ESD
(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
Condition
Min
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
Enable Input Voltage
Enable Input Current
Notes:
1. Exceeding maximum ratings may damage the device.
2. The device is not guaranteed to work 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 may go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions recommended. Human Body Model.
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 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.
9. 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 cur-
rent.
8. For ADJ option, V
OUT
= 3V for dropout specification.
Typ
Max
+1.0
+2.0
Units
%
%
V
V
%/V
%
mV
mV
µA
µA
dB
dB
mA
µVrms
Variation from nominal V
OUT
, I
OUT
= 100ΜA to 500mA
Variation from nominal V
OUT
–1.0
–2.0
1.2375
1.225
1.25
1.25
0.04
0.1
20
200
90
0.5
70
60
600
700
40
40
1.2625
1.275
0.3
0.5
40
400
150
V
IN
= V
OUT
+1V to 5.5V
I
OUT
= 50mA
I
OUT
= 100µA to 500mA
I
OUT
= 500mA
V
EN
≤ 0.2V
I
OUT
= 0 to 500mA
f = up to 1kHz; C
OUT
= 2.2µF ceramic; C
BYP
= 0.1µF
f = 10kHz; C
OUT
= 2.2µF ceramic; C
BYP
= 0.1µF
C
OUT
=2.2µF, C
BYP
= 0.1µF, 10Hz to 100kHz
C
OUT
= 2.2µF; C
BYP
= 0.01µF
V
OUT
= 0V
100
0.2
µs
V
V
µA
µA
Logic Low (Regulator Shutdown)
Logic High (Regulator Enabled)
V
IL
≤ 0.2V (Regulator Shutdown)
V
IH
≥ 1.0V (Regulator Enabled)
1.2
0.01
0.01
1
1
March 2008
4
M9999-032808
模拟电子
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