MIC5305
Micrel, Inc.
MIC5305
150mA µCap Ultra-Low Dropout LDO Regulator
General Description
The MIC5305 is a high-performance, 150mA LDO regula-
tor, offering extremely high PSRR and very low noise while
consuming low ground current.
Ideal for battery-operated applications, the MIC5305 fea-
tures 1% accuracy, extremely low-dropout voltage (60mV @
150mA), and low ground current at light load (typically 90µA).
Equipped with a logic-compatible enable pin, the MIC5305
can be put into a zero-off-mode current state, drawing no
current when disabled.
The MIC5305 is a µCap design operating with very small
ceramic output capacitors for stability, thereby reducing
required board space and component cost.
The MIC5305 is available in fixed-output voltages and adjust-
able output voltages in the super-compact 6-pin 2mm
×
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 of 60mV @ 150mA
Input voltage range: 2.25 to 5.5V
Stable with ceramic output capacitor
150mA guaranteed output current
Low output noise — 20µVrms
Low quiescent current of 90µA total
High PSRR, up to 85dB @1kHz
Less than 30µs turn-on time w/C
BYP
= 0.01µF
High output accuracy:
• ±1.0% initial accuracy
• ±2.0% over temperature
Thermal shutdown protection
Current limit protection
Tiny 6-pin 2mm
×
2mm MLF
®
package
Thin SOT-23-5 package
Cellular phones
PDAs
Fiber optic modules
Portable electronics
Notebook PCs
Audio Codec power supplies
Applications
Typical Application
70
60
Dropout V oltage
DROPOUT VOLTAGE (mV)
50
40
30
20
10
0
0
20 40 60 80 100 120 140
OUTPUT CURRENT (mA)
MIC5305
3.0V
V
IN
1µF
VIN
EN
VOUT
BYP
GND
0.1µF
1µF
2.85V@150mA
V
OUT
PSRR (dB)
100
90
80
70
60
50
40
PSR R
(B
y
pas s P in C ap = 0.1
µ
F )
150mA
50mA
100µA
30
20
10
0
0.1
1
10
100
FREQUENCY (kHz)
1k
MicroLeadFrame
and MLF are registered trademarks of Amkor Technology.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 474-1000 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2006
1
M9999-041206
MIC5305
Micrel, Inc.
Part Number
Marking
Standard
815
818
825
826
827
828
82J
829
830
833
84H
8AA
N815
N818
N825
N826
N827
N828
N82J
N829
N830
N833
N84H
Pb-Free*
815
818
825
826
827
828
82J
829
830
833
84H
8AA
N815
N818
N825
N826
N827
N828
N82J
N829
N830
N833
N84H
Junction
Temp. Range
(1)
-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
Ordering Information
Standard
MIC5305-1.5BML
MIC5305-1.8BML
MIC5305-2.5BML
MIC5305-2.6BML
MIC5305-2.7BML
MIC5305-2.8BML
MIC5305-2.85BML
MIC5305-2.9BML
MIC5305-3.0BML
MIC5305-3.3BML
MIC5305-4.75BML
MIC5305BML
MIC5305-1.5BD5
MIC5305-1.8BD5
MIC5305-2.5BD5
MIC5305-2.6BD5
MIC5305-2.7BD5
MIC5305-2.8BD5
MIC5305-2.85BD5
MIC5305-2.9BD5
MIC5305-3.0BD5
MIC5305-3.3BD5
MIC5305-4.75BD5
Pb-Free
MIC5305-1.5YML
MIC5305-1.8YML
MIC5305-2.5YML
MIC5305-2.6YML
MIC5305-2.7YML
MIC5305-2.8YML
MIC5305-2.85YML
MIC5305-2.9YML
MIC5305-3.0YML
MIC5305-3.3YML
MIC5305-4.75YML
MIC5305YML
MIC5305-1.5YD5
MIC5305-1.8YD5
MIC5305-2.5YD5
MIC5305-2.6YD5
MIC5305-2.7YD5
MIC5305-2.8YD5
MIC5305-2.85YD5
MIC5305-2.9YD5
MIC5305-3.0YD5
MIC5305-3.3YD5
MIC5305-4.7YD5
Voltage
1.5
1.8
2.5
2.6
2.7
2.8
2.85
2.9
3.0
3.3
4.75
ADJ
1.5
1.8
2.5
2.6
2.7
2.8
2.85
2.9
3.0
3.3
4.75
Package
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
6-Pin 2x2 MLF
®
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Note:
1. For other output voltage options, contact Micrel marketing.
* Underbar/Overbar symbols may not be to scale.
April 2006
2
M9999-041206
MIC5305
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
MIC5305-x.xBML/YML
6-Pin 2mm
×
2mm MLF
®
(ML)
(Top View)
MIC5305BML/YML (Adjustable)
6-Pin 2mm
×
2mm MLF
®
(ML)
(Top View)
EN
GND
3
VIN
1
2
KWxx
4
5
BYP
VOUT
MIC5305-x.xBD5/YD5
TSOT-23-5 (D5)
(Top View)
Pin Description
Pin Number
Pin Number
Pin Number
MLF-6 Fixed MLF-6 Adjust. TSOT-23-5 Fixed
1
2
3
4
-
5
6
HS Pad
1
2
3
4
5
-
6
HS Pad
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.
April 2006
3
M9999-041206
MIC5305
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) ...............................................................................................
2kV
Operating Ratings
(2)
Supply Input Voltage (V
IN
) .............................2.25V to 5.5V
Enable Input Voltage (V
EN
) ...................................0V to V
IN
Junction Temperature (T
J
) ........................ –40°C to +125°C
Package Thermal Resistance (est.)
MLF-6 (θ
JA
)......................................................... 93 °C/W
TSOT-23 (θ
JA
) ................................................... 235°C/W
Electrical Characteristics
(5)
Parameter
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.
Condition
Min
Variation from nominal V
OUT
–1.0
–2.0
40
0.02
0.1
20
60
27
85
90
0.5
85
65
300
600
20
30
100
0.2
1.0
0.01
0.01
1
1
900
0.3
0.5
35
85
45
110
150
Typ
Max
+1.0
+2.0
Units
%
%
pm/°C
%/V
%
mV
mV
mV
mV
µA
µA
dB
dB
mA
µVrms
µs
V
V
µA
µA
Output Voltage Accuracy
Output Voltage Temp. Coefficient
Line Regulation
Load Regulation
(6)
Dropout Voltage
(7)
Variation from nominal V
OUT
, I
OUT
= 100ΜA to 150mA
V
IN
= V
OUT
+1V to 5.5V
I
OUT
= 50mA, V
OUT
> 2.8V
I
OUT
= 50mA, V
OUT
≤ 2.8V
I
OUT
= 100µA to 150mA
I
OUT
= 150mA, V
OUT
> 2.8V
I
OUT
= 150mA, V
OUT
≤ 2.8V
Ground Pin Current
(8)
Ground Pin Current in Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Turn-On Time
Enable Input
Enable Input Voltage
Enable Input Current
Notes:
V
EN
≤ 0.2V
I
OUT
= 0 to 150mA
f = 10kHz; C
OUT
= 1.0µF ceramic; C
BYP
= 0.1µF
C
OUT
=1µF, C
BYP
= 0.1µF, 10Hz to 100kHz
C
OUT
= 1µF; C
BYP
= 0.1µF; I
OUT
= 150mA
V
OUT
= 0V
f = up to 1kHz; C
OUT
= 1.0µF ceramic; C
BYP
= 0.1µF
Logic Low (Regulator Shutdown)
Logic High (Regulator Enabled)
V
IH
≥ 1.0V (Regulator Enabled)
V
IL
≤ 0.2V (Regulator Shutdown)
1. Exceeding maximum rating 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 will 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, changes in output voltage due to heating effects are
covered by the thermal regulation specification.
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 2.25V,
dropout voltage is the input-to-output differential with the minimum input voltage 2.25V.
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 cur-
rent.
April 2006
4
M9999-041206
MIC5305
Micrel, Inc.
Typical Characteristics
PSR R
(B
y
pas s P in C ap = 0.01
µ
F )
50mA
150mA
120
100
80
100µA
PSRR (dB)
PSRR (dB)
PSRR (dB)
60
40
20
0
0.1
1
10
100
FREQUENCY (kHz)
100
90
80
70
60
50
40
PSR R
(B
y
pas s P in C ap = 0.1
µ
F )
150mA
50mA
100µA
100
90
80
70
60
50
40
30
20
10
0
0.1
PSR R
(B
y
pas s P in C ap = 1
µ
F )
150mA
100µA
50mA
1k
30
20
10
0
0.1
1
10
100
FREQUENCY (kHz)
1k
1
10
100
FREQUENCY (kHz)
1k
G round P in C urrent
90
GROUND CURRENT (µA)
85
80
75
70
0.1
V IN = V
OUT
+1V
1
10
100
OUTPUT CURRENT (mA)
1000
94
92
90
88
86
84
82
80
78
76
74
I LOAD = 100µA
72
70
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
G round P in C urrent
94
92
90
88
86
84
82
80
78
76
74
I LOAD = 150mA
72
70
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
G round P in C urrent
GROUND CURRENT (µA)
GROUND CURRENT (µA)
GROUND CURRENT (µA)
OUTPUT VOLTAGE (V)
100
90
80
70
60
50
40
30
20
10
0
G round P in C urrent
100
90
80
70
60
50
40
30
20
10
0
G round P in C urrent
GROUND CURRENT (µA)
3.5
3
2.5
2
1.5
1
0.5
0
0
Dropout C harac teris tic s
I
LOAD
= 100µA
I
LOAD
= 150mA
I LOAD = 100µA
0
1
2
3
4
INPUT VOLTAGE (V)
5
6
I LOAD = 150mA
0
1
2
3
4
INPUT VOLTAGE (V)
5
6
1
2
3
4
INPUT VOLTAGE (V)
5
6
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
I OUT = 1mA
0.2
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Dropout V oltage
100
90
80
70
60
50
40
30
20
10
I
= 50mA
OUT
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Dropout V oltage
100
90
80
70
60
50
40
30
20
10
I OUT = 100mA
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Dropout V oltage
DROPOUT VOLTAGE (mV)
April 2006
DROPOUT VOLTAGE (mV)
5
DROPOUT VOLTAGE (mV)
M9999-041206
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