MIC5350
Dual 300mA/500mA LDO
in 2mm x 2mm Thin MLF
®
General Description
The MIC5350 is a tiny Dual Ultra Low-Dropout (ULDO™)
linear regulator ideally suited for portable electronics due
to its low output noise. The MIC5350 integrates two high-
performance; 300mA (V
OUT1
) and 500mA (V
OUT2
) ULDOs™
into a tiny 2mm x 2mm leadless Thin MLF
®
package,
which provides exceptional thermal characteristics.
The MIC5350 is designed to be stable with small ceramic
output capacitors thereby reducing required board space
and component cost. The combination of extremely low-
drop-out voltage, low output noise and exceptional thermal
package characteristics makes it ideal for powering RF
and noise-sensitive circuitry, cellular phone camera
modules, imaging sensors for digital still cameras, PDAs,
MP3 players and WebCam applications.
The MIC5350 ULDO™ is available in fixed-output voltages
in the tiny 8-pin 2mm x 2mm leadless Thin MLF
®
package
which occupies less than half the board area of a single
SOT23-6 package. Additional voltage options are
available. For more information, contact Micrel marketing.
Data sheets and support documentation can be found on
Micrel’s web site at
www.micrel.com.
Features
•
2.6V to 5.5V input voltage range
•
Ultra-low dropout voltage: 75mV @ 300mA and 125mV
@ 500mA
•
Ultra-low output noise: 30µV
RMS
•
±2% initial output accuracy
•
Tiny 8-pin 2mm x 2mm Thin MLF
®
leadless package
•
Excellent Load/Line transient response
•
Fast start-up time: 30µs
•
µCap stable with 2.2µF ceramic capacitors
•
Thermal shutdown protection
•
Low quiescent current: 130µA with both outputs at
maximum load
•
Current-limit protection
Applications
•
•
•
•
•
•
Mobile phones
PDAs
GPS receivers
Portable electronics
Portable media players
Digital still and video cameras
_________________________________________________________________________________________________________________________
Typical Application
RF Power Supply Circuit
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
June 2010
M9999-060410
Micrel, Inc.
MIC5350
Block Diagram
June 2010
2
M9999-060410
Micrel, Inc.
MIC5350
Ordering Information
Part Number
MIC5350-2.8/1.8YMT
MIC5350-2.8/2.8YMT
MIC5350-3.0/1.8YMT
MIC5350-3.3/1.8YMT
MIC5350-3.3/2.8YMT
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.
®
Manufacturing
Part Number
MIC5350-MGYMT
MIC5350-MMYMT
MIC5350-PGYMT
MIC5350-SGYMT
MIC5350-SMYMT
Marking
FMG
FMM
FPG
FSG
FSM
Voltage(V)
V
OUT1
2.8V
2.8V
3.0V
3.3V
3.3V
V
OUT2
1.8V
2.8V
1.8V
1.8V
2.8V
Junction 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
Package
8-Pin 2x2 TMLF
®
8-Pin 2x2 TMLF
®
8-Pin 2x2 TMLF
®
8-Pin 2x2 TMLF
®
8-Pin 2x2 TMLF
®
Pin Configuration
8-Pin 2mm x 2mm TMLF (MT)
TOP VIEW
Pin Description
Pin Number
1
2
3
4
5
6
7
8
EPAD
Pin Name
VIN
GND
BYP
EN2
EN1
NC
VOUT2
VOUT1
HS Pad
Pin Function
Supply Input.
Ground.
Reference Bypass: Connect external 0.1µF to GND to reduce output noise.
May be left open when bypass capacitor is not required.
Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
Not internally connected.
Regulator Output – LDO2 (500mA output).
Regulator Output – LDO1 (300mA output).
Heatsink Pad internally connected to ground.
June 2010
3
M9999-060410
Micrel, Inc.
MIC5350
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ........................................
−0.3V
to
+6V
Enable Input Voltage (V
EN1
, V
EN2
).....................−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 +5.5V
Enable Input Voltage (V
EN1
, V
EN2
) .......................... 0V to V
IN
Junction Temperature ............................... –40°C to +125°C
Junction Thermal Resistance
8-Pin 2mm x 2mm Thin MLF
®
(θ
JA
) ...................90°C/W
Electrical Characteristics
(5)
V
IN
= V
EN1
= V
EN2
= V
OUT
+ 1.0V; higher of the two regulator outputs, I
OUTLDO1
= I
OUTLDO2
= 100µA; C
OUT1
= C
OUT2
= 2.2µF; C
BYP
= 0.1µF;
T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+125°C, unless noted.
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
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
OUT1, 2
= 100µA to 300mA
I
OUT2
=100µA to 500mA
I
OUT1, 2
= 100µA
Dropout Voltage
(6)
I
OUT1, 2
= 50mA
I
OUT1, 2
= 300mA
I
OUT2
= 500mA
V
EN1
≥
1.2V; V
EN2
≤
0.2V; I
OUT
= 0mA to 300mA
Ground Current
Ground Current in Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Enable Inputs (EN1 / EN2)
Enable Input Voltage
Enable Input Current
Logic Low
Logic High
V
IL
≤
0.2V
V
IH
≥
1.2V
C
OUT
= 2.2µF; C
BYP
= 0.01µF
1.2
0.01
0.01
30
100
0.2
V
µA
V
EN1
≤
0.2V; V
EN2
≥
1.2V; I
OUT2
= 0mA to 500mA
V
EN1
= V
EN2
= 1.2V; I
OUT1
= 300mA, I
OUT2
= 500mA
V
EN1
= V
EN2
= 0V
f = 1kHz; C
OUT
= 2.2µF; C
BYP
= 0.1µF
f = 20kHz; C
OUT
= 2.2µF; C
BYP
= 0.1µF
V
OUT1
= 0V
V
OUT2
= 0V
C
OUT
= 2.2µF; C
BYP
= 0.1µF; 10Hz to 100kHz
350
550
Min.
-2.0
-3.0
0.05
0.5
0.7
0.1
12
75
125
95
95
130
0.01
50
35
560
950
30
850
1500
50
200
300
175
175
240
2
µA
dB
mA
µV
RMS
µA
mV
Typ.
Max.
+2.0
+3.0
0.3
0.6
2.0
2.5
Units
%
%/V
%
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2)
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 V
OUT
. For outputs below
2.6V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.6V.
µs
June 2010
4
M9999-060410
Micrel, Inc.
MIC5350
Typical Characteristics
Ground Current
vs. Output Current
140
135
100
Ground Current
vs. Temperature
3.6
Output Voltage
vs. Input Voltage
3.4
100μA
GROUND CURRENT (μA)
GROUND CURRENT (μA)
95
130
125
120
115
110
105
100
95
90
-40
-20
0
20
40
60
I
OUT2
= 500mA
80
100 120 140
I
OUT1
= 300mA
OUTPUT VOLTAGE (V)
I
OUT1
= 300mA and I
OUT2
= 500mA
3.2
3
2.8
2.6
2.4
2.2
2
1.8
1.6
1.4
2.5
300mA
90
85
V
OUT2
= 2.8V
V
IN
= 4.3V
80
0
100
200
300
400
500
V
OUT1
= 3.3V
C
IN
= C
OUT
= 2.2µF
3
3.5
4
4.5
5
5.5
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
3
2.8
Output Voltage
vs. Input Voltage
100μA
1000
900
Current Limit
vs. Input Voltage
180
Dropout Voltage vs.
Temperature
DROPOUT VOLTAGE (mV)
160
140
120
100
80
60
40
20
0
-40
-20
0
20
40
60
80
100
120
V
OUT1, 2
= 150mA
V
OUT1, 2
= 300mA
V
OUT2
= 500mA
OUTPUT VOLTAGE (V)
500mA
2.4
2.2
2
1.8
1.6
1.4
2.5
3
3.5
4
4.5
5
5.5
V
OUT2
= 2.8V
C
IN
= C
OUT
= 2.2µF
Current Limit (mA)
2.6
V
OUT2
800
700
600
V
OUT1
500
400
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
Input Voltage(V)
TEMPERATURE (°C)
Dropout Voltage vs.
Output Current
140
3.6
Output Voltage vs.
Output Current
Output Noise Spectral Density
1
0
DROPOUT VOLTAGE (mV)
OUTPUT VOLTAGE (V)
120
100
80
60
40
20
0
0
50 100 150 200 250 300 350 400 450 500
V
OUT2
= 2.8V
V
EN1
= 0.0V
3.4
V
OUT1
3.2
3
2.8
2.6
2.4
0
50 100 150 200 250 300 350 400 450 500
0.001
1
0
1
00
1
,000
1
0,000
1
00,000
1
,000,000 1
0,000,000
1
NOISE
μV/√Hz
0.1
V
OUT2
V
IN
= 4.3V
C
IN
= C
OUT
= 2.2μF
0.01
V
IN
= 4.5V
C
OUT
= 2.2μF
V
OUT1
= 2.8V
I
LOAD
= 75mA
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
FREQUENCY (Hz)
June 2010
5
M9999-060410
PCB设计
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
