MIC5333
Micro-Power High Performance
Dual 300mA ULDO™ with Dual POR
General Description
The MIC5333 is a tiny dual low quiescent current LDO
ideal for applications that are power sensitive. The
MIC5333 integrates two high performance, 300mA LDOs,
and a POR generator for each LDO into a 2.5mm x 2.5mm
Thin MLF
®
package, which occupies less PC board area
than a single SOT-23 package.
The MIC5333 is designed to reject input noise and provide
low output noise with fast transient response to respond 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 MIC5333 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 10-pin 2.5mm x 2.5mm 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
POR output with programmable delay for each LDO
High PSRR – >65dB on each LDO
Stable with 1µF ceramic output capacitors
Tiny 10-pin 2.5mm x 2.5mm 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
MIC5333-xxYMT
VIN
EN1
EN2
VBAT
CSET1
CSET2
1µF
GND
VOUT1
VOUT2
POR1
POR2
100k
100k
I/O
CORE
/RST
I/O
/RST
CORE
1µF
1µF
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.
MIC5333
Ordering Information
Part Number
MIC5333-2.5/1.2YMT
MIC5333-2.8/2.8YMT
MIC5333-2.8/2.85YMT
MIC5333-2.85/2.85YMT
MIC5333-3.0/2.8YMT
MIC5333-3.0/2.85YMT
MIC5333-3.0/3.0YMT
Manufacturing
Part Number
MIC5333-J4YMT
MIC5333-MMYMT
MIC5333-MNYMT
MIC5333-NNYMT
MIC5333-PMYMT
MIC5333-PNYMT
MIC5333-PPYMT
Marking
XJ4
XMM
XMN
XNN
XPM
XPN
XPP
Voltage
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
Package
10-Pin 2.5 x 2.5 Thin MLF
®
10-Pin 2.5 x 2.5 Thin MLF
®
10-Pin 2.5 x 2.5 Thin MLF
®
10-Pin 2.5 x 2.5 Thin MLF
®
10-Pin 2.5 x 2.5 Thin MLF
®
10-Pin 2.5 x 2.5 Thin MLF
®
10-Pin 2.5 x 2.5 Thin MLF
®
Note:
Other voltage options available. Contact Micrel for details.
Pin Configuration
VIN
GND
POR2
POR1
EN2
1
2
3
4
5
10 VOUT1
9
8
7
6
VOUT2
CSET2
CSET1
EN1
10-Pin 2.5mm x 2.5mm Thin MLF
®
(MT)
(Top View)
Pin Description
Pin Number
1
2
3
4
5
6
7
Pin Name
VIN
GND
POR2
POR1
EN2
EN1
CSET1
Pin Function
Supply Input.
Ground.
Power-On Reset Output (Regulator 2): Open-drain output. Active low indicates
an output under-voltage condition on regulator 2 when the device is enabled.
Power-On Reset Output (Regulator 1): Open-drain output. Active low indicates
an output under-voltage condition on regulator 1 when the device is enabled.
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.
Delay Set Input (Regulator 1): Connect external capacitor to GND to set the
internal delay for the POR1 output. When left open, there is no delay. This pin
cannot be grounded.
Delay Set Input (Regulator 2): Connect external capacitor to GND to set the
internal delay for the POR2 output. When left open, there is no delay. This pin
cannot be grounded.
Regulator Output – LDO2.
Regulator Output – LDO1.
8
CSET2
9
10
VOUT2
VOUT1
February 2008
2
M9999-021408-A
Micrel, Inc.
MIC5333
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ............................................. 0V to +6V
Enable Input Voltage (V
EN1
, V
EN2
) .......................... 0V to V
IN
POR Voltage (V
POR1
, V
POR2
) ................................. 0V to +6V
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
POR Voltage (V
POR1
, V
POR2
) .............................. 0V to +5.5V
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
2.5mm x 2.5mm Thin MLF-10 (θ
JA
) ...................75°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)
POR1/POR2 Output
V
TH
V
OL
I
POR
Low Threshold, % of V
OUT
(POR ON)
High Threshold, % of V
OUT
(POR OFF)
POR Output Logic Low Voltage; I
L
= 250µA
POR Leakage Current, POR OFF
–1.0
0.02
0.01
88
98
0.1
+1.0
%
%
V
µA
C
OUT
= 1µF (Enable of First LDO)
C
OUT
= 1µF (Enable of Second LDO after First Enabled)
140
110
500
500
µs
µs
Logic Low
Logic High
V
IL
≤
0.2V
V
IH
≥
1.2V
1.2
0.01
0.01
1.0
1.0
0.2
V
V
µA
µA
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
350
Min
–1.0
–2.0
0.02
0.2
20
120
25
25
40
0.01
65
45
550
50
800
Typ
Max
+1.0
+2.0
0.3
0.6
0.5
40
240
50
50
75
1.0
Units
%
%
%/V
%/V
%
mV
mV
µA
µA
µA
µA
dB
dB
mA
µV
RMS
February 2008
3
M9999-021408-A
Micrel, Inc.
Parameter
CSET1/CSET2 INPUT
CSET Pin Current Source
CSET Pin Threshold Voltage
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
MIC5333
Condition
V
CSET
= 0V
POR = High
Min
0.8
1.21
Typ
1.4
1.25
Max
2
1.29
Units
µA
V
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.
February 2008
4
M9999-021408-A
Micrel, Inc.
MIC5333
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
POR Delay vs. CSET
100K
1.2
1.0
10K
0.8
0.6
1K
0.4
V
IN
= 3.6V
V
OUT
= 1.2V
C
OUT
= 1µF
1K
10K
CSET (pF)
100K
0.2
0
10
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
100
100
100
1K
10K 100K
FREQUENCY (Hz)
1M
February 2008
5
M9999-021408-A
嵌入式系统
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