MIC5353
500mA LDO in 1.6mm
×
1.6mm Package
General Description
The MIC5353 is a high-performance, single-output, ultra-
low LDO (ULDO™) regulator, offering a low total output
noise of 30μV
RMS
. The MIC5353 is capable of sourcing
500mA output current and offers high-PSRR and low-
output noise, making it an ideal solution for RF
applications.
The MIC5353 provides 2% accuracy, extremely low
dropout voltage (160mV @ 500mA), and low ground
current (typically 90µA) making it ideal for battery-operated
applications. When disabled, the MIC5353 enters a zero-
off-mode current state, thereby drawing almost no current.
The MIC5353 is available in the 1.6mm x 1.6mm Thin
MLF
®
package, occupying only 2.56mm
2
of PCB area, a
36% reduction in board area compared to SC-70 and 2mm
x 2mm Thin MLF
®
packages.
The MIC5353 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) Thin MLF
®
package.
Data sheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
500mA guaranteed output current
Input voltage range: 2.6V to 6V
Ultra low dropout voltage: 160mV @ 500mA
± 2% initial accuracy
Ultra low output noise: 30µVrms
Low quiescent current: 90µA
Stable with ceramic output capacitors
35µs turn-on time
Thermal shutdown and current limit protection
Tiny 6-pin 1.6mm x 1.6mm Thin MLF
®
leadless package
Applications
•
•
•
•
•
Mobile Phones
GPS, PDAs, PMP, handhelds
Portable electronics
Digital still and video cameras
Digital TV
_________________________________________________________________________________________________________________________
Typical Application
Portable Application
ULDO is a trademark of Micrel, Inc
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
May 2010
M9999-052510
Micrel, Inc.
MIC5353
Ordering Information
Part Number
MIC5353-1.8YMT
MIC5353-2.5YMT
MIC5353-2.6YMT
MIC5353-2.8YMT
MIC5353-3.0YMT
MIC5353-3.3YMT
MIC5353YMT
Notes:
1.
2.
3.
Pin 1 identifier= “▲”.
For other voltage options contact Micrel Marketing.
Thin MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu, Mold compound is Halogen Free.
®
Marking Code
(1)
18R
25R
26R
28R
30R
33R
AAR
Output Voltage
(2)
1.8V
2.5V
2.6V
2.8V
3.0V
3.3V
ADJ
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
Package
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
Pin Configuration
6-Pin 1.6mm
×
1.6mm Thin MLF
®
(MT)
Fixed
(TOP VIEW)
6-Pin 1.6mm
×
1.6mm Thin MLF
®
(MT)
Adjustable
(TOP VIEW)
Pin Description
Pin Number
Thin MLF-6
Fixed
1
2
3
4
5
–
6
EPad
Pin Number
Thin MLF-6
Adjustable
1
2
3
4
–
5
6
EPad
Pin Name
EN
GND
VIN
VOUT
NC
ADJ
BYP
HS PAD
Pin Function
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 0.1μF to GND for reduced Output Noise. May
be left open.
Exposed Heat-sink Pad connected to ground internally.
May 2010
2
M9999-052510
Micrel, Inc.
MIC5353
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .....................................
−0.3V
to
+6.5V
Enable Input Voltage (V
EN
)................................−0.3V to V
IN
Power Dissipation ..................................Internally Limited
(3)
Lead Temperature (soldering, 3sec) .......................... 260°C
Storage Temperature (T
S
).........................−65°C to +150°C
ESD Rating
(4)
................................................................. 2KV
Operating Ratings
(2)
Supply Voltage (V
IN
) ......................................
+2.6V
to
+6.0V
Enable Input Voltage (V
EN
) ...................................... 0V to V
IN
Junction Temperature (T
J
) ..........................
−40°C
to
+125°C
Junction Thermal Resistance
6-Pin 1.6mm x1.6mm Thin MLF
®
(θ
JA
) ...........92.4°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
Line Regulation
Load Regulation
Dropout Voltage
(6)
Ground Pin Current
Ground Pin Current in Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Enable Input
Enable Input Voltage
Enable Input Current
Turn-on Time
Turn-on Time
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 1.5KΩ in series with 100pF.
5. Specification for packaged product only.
6. 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.
Conditions
Variation from nominal V
OUT
Variation from nominal V
OUT
; –40°C to +125°C
V
IN
= V
OUT
+ 1V to 6V; I
OUT
= 100µA
I
OUT
= 100µA to 500mA
I
OUT
= 150mA
I
OUT
= 300mA
I
OUT
= 500mA
I
OUT
= 0 to 500mA
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
V
IL
≤
0.2V
V
IH
≥
1.2V
C
OUT
= 1.0µF; C
BYP
= 0.1µF
Min.
-2.0
-3.0
Typ.
Max.
+2.0
+3.0
Units
%
%/V
%
mV
µA
µA
dB
0.05
0.15
50
100
160
90
0.01
60
45
600
1100
30
0.3
0.6
2.0
100
200
350
175
2
1600
mA
µV
RMS
0.2
1.2
0.01
0.01
35
1
1
100
V
µA
µs
May 2010
3
M9999-052510
Micrel, Inc.
MIC5353
Functional Diagram
MIC5353 Block Diagram – FIXED
MIC5353 Block Diagram – ADJUSTABLE
May 2010
4
M9999-052510
Micrel, Inc.
MIC5353
Typical Characteristics
Dropout Voltage
vs. Output Current
200
250
Dropout Voltage
vs. Temperature
92
90
Ground Current
vs. Output Current
DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
180
160
140
120
100
80
60
40
20
0
0
50 100 150 200 250 300 350 400 450 500
500mA
Ground Current(μA)
200
88
86
84
82
150
100
300mA
V
OUT
= 2.8V
V
IN
= 3.8V
50
150mA
0
-40 -20
0
20
40
60
80 100 120 140
80
0
100
200
300
400
500
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
Output Current(mA)
Ground Current
vs. Temperature
120
1.84
1.83
Output Voltage
vs. Output Current
3.6
Output Voltage
vs. Input Voltage
3.4
3.2
3
2.8
2.6
2.4
2.2
2
150mA
2.6
3
3.4
3.8
4.2
500mA
300mA
V
OUT
= 2.8V
C
IN
= C
OUT
= 1μF
4.6
5
5.4
5.8
100μA
GROUND CURRENT (μA)
OUTPUT VOLTAGE(V)
110
100
I
OUT
= 500mA
90
80
70
60
-40
-20
0
20
40
60
80
100 120 140
1.82
1.81
1.8
1.79
1.78
1.77
1.76
0
50
100 150 200 250 300 350 400 450 500
I
OUT
= 100μA
V
IN
=2.8V
C
OUT
=C
IN
=1μF
OUTPUT CURRENT(mA)
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
1.4
Current Limit
vs. Input Voltage
-100
Output Noise Spectral Density
PSRR
10
1.3
CURRENT LIMIT(mA)
-90
1.2
-80
-70
-60
500µA
1
dB
1
V
OUT
=2.8V
C
IN
=C
OUT
=1μF
Noise uV/√Hz
1.1
100µA
-50
300µA
-40
-30
0.1
0.9
0.8
2.5
3
3.5
4
4.5
5
5.5
6
-20
-10
0
10
100
1,000
10,000
100,000
1,000,000 10,000,000
C
OUT
= 1µF
C
BYP
= 0.1µF
0.01
INPUT VOLTAGE(V)
V
IN
= 4.5V
C
OUT
= 1µF
V
OUT
= 1.8V
I
LOAD
= 50mA
C
BYP
= 0.1µF
10
100
1,000
10,000
100,000
1,000,000
10,000,000
0.001
FREQUENCY (Hz)
FREQUENCY (Hz)
May 2010
5
M9999-052510
PCB设计
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