MIC5331
Micro-Power High Performance
Dual 300mA ULDO™
General Description
The MIC5331 is a tiny dual low quiescent current LDO
ideal for applications that are power sensitive. The
MIC5331 integrates two high performance, 300mA LDOs
into a tiny 2mm x 2mm Thin MLF
®
package, which
occupies less PC board area than a single SOT-23
package.
The MIC5331 is designed to reject input noise and provide
low output noise with fast transient response to any load
change quickly even though it is a low quiescent current
part. This combination of PSRR, low noise and transient
response along with low power consumption makes for a
very high performance, yet general purpose product.
The MIC5331 is a µCap design, operating with very small
ceramic output capacitors, which reduces required board
space and component cost; and it is available in fixed
output voltages in the tiny 8-pin 2mm x 2mm Thin MLF
®
leadless package.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
2.3V to 5.5V input voltage range
300mA output current per LDO
Very low quiescent current: 25µA per LDO
High PSRR - >65dB on each LDO
Stable with 1µF ceramic output capacitors
Tiny 8-pin 2mm x 2mm Thin MLF
®
package
Ultra-low dropout voltage – 120mV @ 300mA
Low output voltage noise – 50µVrms
Thermal shutdown protection
Current limit protection
Applications
•
•
•
•
•
Camera phones
Mobile phones
PDAs
GPS receivers
Portable devices
___________________________________________________________________________________________________________
Typical Application
MIC5331-xxYMT
VIN
EN1
VBAT
1µF
EN2
GND
VOUT1
VOUT2
1µF
1µF
I/O
CORE
Camera DSP
Camera DSP 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
February 2008
M9999-021408-A
Micrel, Inc.
MIC5331
Ordering Information
Part Number
MIC5331-1.8/1.2YMT
MIC5331-2.5/1.2YMT
MIC5331-2.8/2.8YMT
MIC5331-2.8/2.85YMT
MIC5331-2.85/2.85YMT
MIC5331-3.0/2.8YMT
MIC5331-3.0/2.85YMT
MIC5331-3.0/3.0YMT
Manufacturing
Part Number
MIC5331-G4YMT
MIC5331-J4YMT
MIC5331-MMYMT
MIC5331-MNYMT
MIC5331-NNYMT
MIC5331-PMYMT
MIC5331-PNYMT
MIC5331-PPYMT
Marking
UG4
UJ4
UMM
UMN
UNN
UPM
UPN
UPP
Voltage
1.8V/1.2V
2.5V/1.2V
2.8V/2.8V
2.8V/2.85V
2.85V/2.85V
3.0V/2.8V
3.0V/2.85V
3.0V/3.0V
Junction
Temperature Range
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
Package
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
Note:
Other voltage options available. Contact Micrel for details.
Pin Configuration
VIN
GND
NC
EN2
1
2
3
4
8
7
6
5
VOUT1
VOUT2
NC
EN1
8-Pin 2mm x 2mm Thin MLF
®
(MT)
(Top View)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
VIN
GND
NC
EN2
EN1
NC
VOUT2
VOUT1
Pin Function
Supply Input.
Ground.
Not Internally Connected.
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.
Regulator Output – LDO1.
February 2008
2
M9999-021408-A
Micrel, Inc.
MIC5331
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ............................................. 0V to +6V
Enable Input Voltage (V
EN1
, V
EN2
) .......................... 0V to V
IN
Power Dissipation .................................. Internally Limited
(3)
Lead Temperature (soldering, 3sec.)......................... 260°C
Storage Temperature (T
s
) .........................–65°C to +150°C
ESD Sensitive
(4)
Operating Ratings
(2)
Supply Voltage (V
IN
)..................................... +2.3V to +5.5V
Enable Input Voltage (V
EN1
, V
EN2
) .......................... 0V to V
IN
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
2mm x 2mm Thin MLF-8 (
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
OUT1
= I
OUT2
= 100µA; C
OUT1
= C
OUT2
= 1µF;
T
J
= 25°C,
bold
values indicate –40°C < T
J
< +125°C; unless noted.
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
Dropout Voltage
Ground Current
Condition
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 300mA
I
OUT
= 50mA
I
OUT
= 300mA
V
EN1
= High; V
EN2
= Low; I
OUT
= 100µA to 300mA
V
EN1
= Low; V
EN2
= High; I
OUT
= 100µA to 300mA
V
EN1
= V
EN2
= High; I
OUT1
= 300mA, I
OUT2
= 300mA
Ground Current in Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Enable Inputs (EN1/EN2 )
Enable Input Voltage
Enable Input Current
Turn-on Time
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.
Min
–1.0
–2.0
Typ
Max
+1.0
+2.0
Units
%
%
%/V
%/V
%
mV
mV
µA
µA
µA
µA
dB
dB
0.02
0.2
20
120
25
25
40
0.01
65
45
350
550
50
0.3
0.6
0.5
40
240
50
50
75
1.0
V
EN1
= V
EN2
< 0.2V
f = 1kHz; C
OUT
= 2.2µF
f = 20kHz; C
OUT
= 2.2µF
V
OUT
= 0V
C
OUT
=1µF; 10Hz to 100kHz
Logic Low
Logic High
V
IL
≤
0.2V
V
IH
≥
1.2V
C
OUT
= 1µF (Enable of First LDO)
C
OUT
= 1µF (Enable of Second LDO after First Enabled)
1.2
800
mA
µV
RMS
0.2
0.01
0.01
140
110
1.0
1.0
500
500
V
V
µA
µA
µs
µs
February 2008
3
M9999-021408-A
Micrel, Inc.
MIC5331
Typical Characteristics
PSRR
-100
-90
-80
-70
-60
-50
-40
-30
-20 V
IN
= 2.3V
V
= 1.2V
-10
OUT
C
OUT
= 2.2µF
0
FREQUENCY (Hz)
300mA
-90
50mA
-80
-70
-60
-50
-40
-30
-20 V
IN
= 2.3V
-10 V
OUT
= 1.2V
C
OUT
= 1µF
0
FREQUENCY (Hz)
300mA
50mA
PSRR
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
0
Dropout Voltage
vs. Load Current
V
OUT
= 2.8V
C
OUT
= 1µF
50 100 150 200 250 300
LOAD CURRENT (mA)
0.18
Dropout Voltage
vs. Temperature
300mA
V
OUT
= 2.8V
0.16 C
OUT
= 1µF
0.14
0.12
0.10
0.08
0.06
0.04
0.02
40
38
Ground Current
vs. Supply Voltage
Dual LDO Enabled
41
39
37
Ground Current
vs. Load Current
Dual LDO Enabled
100mA
50mA
10mA
36 V
OUT1
= 2.5V
34 V
OUT2
= 1.2V
32 C
OUT1
= 1µF
C
= 1µF
30
OUT2
I
OUT1
= 300mA
28 I
OUT2
= 300mA
26
24
22
20
2
Single LDO Enabled
35 V
IN
= V
OUT
+ 1V
V
OUT1
= 2.5V
33 V
OUT2
= 1.2V
31 C
OUT1
= 1µF
C
OUT2
= 1µF
29
27
Single LDO Enabled
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
2.5 3 3.5 4 4.5 5
SUPPLY VOLTAGE (V)
5.5
25
0
50 100 150 200 250 300
LOAD CURRENT (mA)
45
42
39
36
33
Ground Current
vs. Temperature
2.820
2.816
2.812
Output Voltage
vs. Load Current
3.0
2.9
2.8
2.7
Output Voltage
vs. Temperature
10mA
100mA
300mA
2.808
2.804
2.800
0
V
IN
= V
OUT +
1V
V
OUT
= 2.8V
C
OUT
= 1µF
50 100 150 200 250 300
LOAD CURRENT (mA)
EN1 = EN2 = V
IN
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 1µF
30
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
2.6
2.5
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 1µF
850
800
750
700
650
600
550
500
450
400
350
2
Current Limit
vs. Supply Voltage
1.2
1.0
0.8
0.6
0.4
Output Noise
Spectral Density
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 1µF
Load = 50mA
C
IN
= 1µF
C
OUT
= 1µF
2.5 3 3.5 4 4.5 5
SUPPLY VOLTAGE (V)
5.5
0.2
0
10
100
1K
10K 100K
FREQUENCY (Hz)
1M
February 2008
4
M9999-021408-A
Micrel, Inc.
MIC5331
Functional Characteristics
February 2008
5
M9999-021408-A
嵌入式系统
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