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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
features 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
adjustable output voltages in the super-compact 6-pin
2mm × 2mm MLF
®
leadless package, our new ultra-thin
6-pin 2mm × 2mm Thin MLF
®
and thin SOT-23-5 package.
Additional voltage options are available. Contact Micrel
marketing.
Data sheets and 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
Ultra-Thin 6-pin 2mm × 2mm Thin 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
DROPOUT VOLTAGE (mV)
60
50
40
30
20
10
0
0
20 40 60 80 100 120 140
OUTPUT CURRENT (mA)
Dropout Voltage
MIC5305
3.0V
V
IN
1µF
VIN VOUT
EN
BYP
GND
0.1µF
1µF
2.85V@150mA
V
OUT
100
90
80
70
PSRR (dB)
60
50
40
30
20
10
PSRR
(Bypass Pin Cap = 0.1µF)
150mA
50mA
100µA
0
0.1
1
10
100
FREQUENCY (kHz)
1k
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
June 2007
1
M9999-062507
Micrel, Inc.
MIC5305
Ordering Information
Part Number
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
Marking
Pb-Free
Standard
815
818
825
826
827
828
82J
829
830
833
84H
8AA
Pb-Free*
815
818
820
825
826
827
828
82J
829
830
833
84H
8AA
828**
846**
Voltage
1.5V
1.8V
2.0V
2.5V
2.6V
2.7V
2.8V
2.85V
2.9V
3.0V
3.3V
4.75V
ADJ
2.8V
4.6V
1.5V
1.8V
2.5V
2.6V
2.7V
2.8V
2.85V
2.9V
3.0V
3.3V
4.75V
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
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
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
6-Pin 2x2 MLF
®
®
®
®
®
®
®
®
®
®
®
®
®
®
®
MIC5305-1.5YML
MIC5305-1.8YML
MIC5305-2.0YML
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
MIC5305-2.8YMT
MIC5305-4.6YMT
6-Pin 2x2 Thin MLF
6-Pin 2x2 Thin 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
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
Note:
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
MIC5305-4.75YD5
N815
N818
N825
N826
N827
N828
N82J
N829
N830
N833
N84H
N815
N818
N825
N826
N827
N828
N82J
N829
N830
N833
N84H
1. For other output voltage options, contact Micrel marketing.
* Underbar/Overbar symbols may not be to scale.
** Pin 1 identifier for 2x2 Thin MLF is “▲” symbol.
®
June 2007
2
M9999-062507
Micrel, Inc.
MIC5305
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 (Fixed)
6-Pin 2mm x 2mm MLF
®
(ML)
(Top View)
MIC5305-x.xBML/YML (Adjustable)
6-Pin 2mm x 2mm MLF
®
(ML)
(Top View)
EN 1
GND 2
VIN 3
6 BYP
5 NC
4 VOUT
EN GND VIN
3
2
1
KWxx
4
5
BYP
MIC5305-x.xYMT (Fixed)
®
6-Pin 2mm x 2mm Thin MLF (MT)
(Top View)
VOUT
MIC5305-x.xBD5/YD5 (Fixed)
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
Adjustable
1
2
3
4
5
–
6
HS Pad
Pin Number
Thin MLF-6
Fixed
1
2
3
4
–
5
6
HS Pad
–
4
–
Pin Number
TSOT23-5
Fixed
3
2
1
5
Pin Name
Pin Name
EN
GND
VIN
VOUT
ADJ
NC
BYP
EPAD
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.
June 2007
3
M9999-062507
Micrel, Inc.
MIC5305
Absolute Maximum Ratings
(1)
Supply 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
Lead Temperature (soldering, 5sec.)......................... 260°C
Storage Temperature (T
s
) .........................–65°C to +150°C
EDS Rating
(4)
.................................................................. 2kV
Operating Ratings
(2)
Supply 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
Junction Thermal Resistance
MLF-6 (θ
JA
) ........................................................93°C/W
Thin MLF-6 (θ
JA
) ................................................93°C/W
TSOT-23-5 (θ
JA
) ..............................................235°C/W
Electrical Characteristics
(5)
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
Output Voltage Temp.
Coefficient
Line Regulation
Load Regulation
Dropout Voltage
(6)
(7)
Condition
Variation from nominal V
OUT
Variation from nominal V
OUT
, I
OUT
= 100mA to 150mA
Min
–1.0
Typ
Max
+1.0
Units
%
%
pm/°C
–2.0
40
+2.0
V
IN
= V
OUT
+1V to 5.5V
I
OUT
= 100µA to 150mA
I
OUT
= 50mA, V
OUT
> 2.8V
I
OUT
= 150mA, V
OUT
> 2.8V
I
OUT
= 50mA, V
OUT
> 2.8V
I
OUT
= 150mA, V
OUT
> 2.8V
0.02
0.1
20
60
27
85
90
0.5
85
65
0.3
0.5
35
85
45
110
150
%/V
%
mV
mV
mV
mV
µA
µA
dB
dB
Ground Pin Current
(8)
I
OUT
= 0 to 150mA
V
EN
≤
0.2V
f = up to 1kHz; C
OUT
= 1.0µF ceramic; C
BYP
= 0.1µF
f = 10kHz; C
OUT
= 1.0µF ceramic; C
BYP
= 0.1µF
V
OUT
= 0V
C
OUT
=1µF, C
BYP
= 0.1µF, 10Hz to 100kHz
C
OUT
= 1µF; C
BYP
= 0.1µF; I
OUT
= 150mA
Logic Low (Regulator Shutdown)
Logic High (Regulator Enabled)
Ground Pin Current in
Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Turn-On Time
300
600
20
30
900
100
0.2
mA
µVrms
µs
V
V
µA
µA
Enable Input
Enable Input Voltage
Enable Input Current
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.
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
current.
1.0
0.01
0.01
V
IL
≤
0.2V (Regulator Shutdown)
V
IH
≥
1.0V (Regulator Enabled)
1
1
June 2007
4
M9999-062507
单片机
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