MIC5301
Single, 150mA µCap ULDO™
General Description
The MIC5301 is a high performance, single output
ultra low LDO (ULDO™) regulator, offering low total
output noise. The MIC5301 is capable of sourcing
150mA output current and offers high PSRR and low
output noise, making it an ideal solution for RF
applications.
For battery operated applications, the MIC5301 offers
2% accuracy, extremely low dropout voltage (40mV @
150mA), and low ground current (typically 85µA total).
The MIC5301 can also be put into a zero-off-mode
current state, drawing no current when disabled.
The MIC5301 is available in the 1.6mm x 1.6mm
MLF
®
package, occupying only 2.56mm
2
of PCB area,
a 36% reduction in board area compared to SC-70
and 2mm x 2mm MLF
®
packages.
The MIC5301 has an operating junction temperature
range of –40°C to +125°C and is available in fixed and
adjustable output voltages in lead-free (RoHS
compliant) MLF
®
and Thin SOT-23-5 packages.
Data sheets and support documentation can be found
on Micrel’s web site at www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
Ultra low dropout voltage – 40mV @ 150mA
Input voltage range: 2.3V to 5.5V
150mA guaranteed output current
Stable with ceramic output capacitors
Ultra low output noise – 30µVrms
Low quiescent current – 85µA total
High PSRR – up to 75dB@1kHz
35µs turn-on time
High output accuracy
– ± 2% initial accuracy
– ± 3% over temperature
•
Thermal shutdown and current limit protection
•
Tiny 6-pin 1.6mm x 1.6mm MLF
®
leadless
package
•
Thin SOT-23-5 package
Applications
•
•
•
•
•
Mobile phones
PDAs
GPS receivers
Portable electronics
Digital still and video cameras
Typical Application
MIC5301-x.xYML
V
IN
VIN
EN
VOUT
1µF
BYP
GND
1µF
0.01µF
Portable Application
ULDO is a trademark of Micrel, Inc.
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technologies, 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
November 2006
M9999-111506
Micrel, Inc.
MIC5301
Ordering Information
Part number
MIC5301-2.85YML
MIC5301YML
MIC5301-2.85YD5
MIC5301YD5
Notes:
* Under bar / Over bar symbol may not be to scale.
** Other Voltages available. Contact Micrel for details.
Marking
Code*
2JC
CAA
QC2J
QCAA
Output
Voltage**
2.85V
ADJ.
2.85V
ADJ.
Temperature Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
6-Pin 1.6 x 1.6 MLF
®
6-Pin 1.6 x 1.6 MLF
®
5-Pin TSOT-23
5-Pin TSOT-23
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M9999-111506
Micrel, Inc.
MIC5301
Pin Configuration
EN 1
GND 2
IN 3
6
5
4
BYP
NC
OUT
EN 1
GND 2
IN 3
6
5
4
BYP
ADJ
OUT
6-Pin 1.6mm x 1.6mm MLF (ML)
Fixed (Top View)
6-Pin 1.6mm x 1.6mm MLF (ML)
Adjustable (Top View)
EN GND IN
1
3
2
EN GND IN
1
3
2
4
BYP
5
OUT
4
ADJ
5
OUT
TSOT-23-5 (D5)
Fixed (Top View)
TSOT-23-5 (D5)
Adjustable (Top View)
Pin Description
Pin No.
MLF-6
Fixed
1
2
3
4
5
–
6
HS Pad
Pin No.
MLF-6
Adj.
1
2
3
4
–
5
6
HS Pad
Pin No.
TSOT-23-5
Fixed
3
2
1
5
–
–
4
–
Pin No.
TSOT-23-5
Adj.
3
2
1
5
–
4
–
–
Pin Name
Pin Function
EN
GND
IN
OUT
NC
ADJ
BYP
E PAD
Enable Input. Active High. High = on, low = off.
Do not leave floating.
Ground
Supply Input.
Output Voltage.
No connection.
Adjust Input. Connect to external resistor voltage divider
network.
Reference Bypass: Connect external 0.01
µ
F to GND for
reduced Output Noise. May be left open.
Exposed Heatsink Pad connected to ground internally.
November 2006
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M9999-111506
Micrel, Inc.
MIC5301
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .....................................0V to +6V
Enable Input Voltage (V
EN
)...........................0V to +6V
Power Dissipation, Internally Limited
(3)
Lead Temperature (soldering, 3sec) ..................260°C
Storage Temperature (T
S
) ................ –65°C to +150°C
Operating Ratings
(2)
Supply Voltage (V
IN
).............................. +2.3V to +5.5V
Enable Input Voltage (V
EN
).............................. 0V to V
IN
Junction Temperature (T
J
) ................. –40°C to +125°C
Junction Thermal Resistance
MLF-6 (θ
JA
).............................................. 100°C/W
TSOT-23-5 (θ
JA
) ...................................... 235°C/W
Electrical Characteristics
(4)
V
IN
= V
OUT
+ 1.0V; C
OUT
= 1.0µF; I
OUT
= 100µA; T
J
= 25°C,
bold
values indicate –40°C to +125°C, unless noted.
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
Dropout Voltage
(5)
Conditions
Variation from nominal V
OUT
Variation from nominal V
OUT
; –40°C to +125°C
V
IN
= V
OUT
+ 1V to 5.5V; I
OUT
= 100µA
I
OUT
= 100µA to 150mA
I
OUT
= 100µA
I
OUT
= 100mA
I
OUT
= 150mA
Min
-2.0
Typ
Max
+2.0
Units
%
%
%/V
%/V
%
mV
mV
mV
µA
µA
dB
dB
-3.0
0.02
0.15
0.1
25
40
85
0.01
75
50
275
450
30
+3.0
0.3
0.6
2.0
75
100
120
2
Ground Pin Current
Ground Pin Current in
Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
I
OUT
= 0 to 150mA
V
EN
≤
0.2V
f = 1kHz; C
OUT
= 1.0µF; C
BYP
= 0.1µF
f = 20kHz; C
OUT
= 1.0µF; C
BYP
= 0.1µF
V
OUT
= 0V
C
OUT
= 1.0µF; C
BYP
= 0.1µF; 10Hz to 100kHz
Logic Low
Logic High
850
mA
µV
RMS
Enable Input
Enable Input Voltage
Enable Input Current
0.2
1
0.01
0.01
35
1
1
V
V
µA
µA
µs
V
IL
≤
0.2V
V
IH
≥
1.0V
Turn-on Time
Turn-on Time
C
OUT
= 1.0µF; C
BYP
= 0.1µF
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. Specification for packaged product only.
5. 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.
November 2006
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M9999-111506
Micrel, Inc.
MIC5301
Functional Diagram
VIN
EN
Quick-
Start
VOUT
V
REF
Error
LDO
Amp
BYP
Thermal
Shutdown
Current
Limit
GND
MIC5301 Block Diagram – Fixed
VIN
EN
Quick-
Start
VOUT
V
REF
Error
LDO
Amp
BYP
ADJ
Thermal
Shutdown
Current
Limit
GND
MIC5301 Block Diagram – Adjustable
November 2006
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M9999-111506
嵌入式系统
