MIC5332
Micro-Power High Performance
Dual 300mA ULDO™
General Description
The MIC5332 is a tiny dual low quiescent current LDO
ideal for applications that are power sensitive. The
MIC5332 integrates two high performance 300mA LDOs,
and a POR generator into a 2mm x 2mm Thin MLF
®
package. This solution occupies the same PC board area
of a single SOT-23 package.
The MIC5332 is designed to reject input noise and provide
low output noise with fast transient response so as 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 MIC5332 is a µCap design, operating with very small
ceramic output capacitors, which reduces required board
space and component cost. It is available in fixed output
voltages in a 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
POR output with programmable delay on LDO2
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
10k
VI/O
VCORE
/RST
1µF
1µF
µProcessor
MIC5332-xxYMT
VIN
EN1
EN2
VBAT
CIN
1µF
CSET2
POR2
GND
VOUT1
VOUT2
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
January 2007
M9999-011608-A
Micrel, Inc.
MIC5332
Ordering Information
Part Number
MIC5332-2.5/1.2YMT
MIC5332-2.8/2.8YMT
MIC5332-2.8/2.85YMT
MIC5332-2.85/2.85YMT
MIC5332-3.0/2.8YMT
MIC5332-3.0/2.85YMT
MIC5332-3.0/3.0YMT
Manufacturing
Part Number
MIC5332-J4YMT
MIC5332-MMYMT
MIC5332-MNYMT
MIC5332-NNYMT
MIC5332-PMYMT
MIC5332-PNYMT
MIC5332-PPYMT
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
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 additional details.
Pin Configuration
VIN
GND
POR2
EN2
1
2
3
4
8
7
6
5
VOUT1
VOUT2
CSET2
EN1
8-Pin 2mm x 2mm Thin MLF
®
(MT)
(Top View)
Pin Description
Pin Number
1
2
3
4
5
6
Pin Name
VIN
GND
POR2
EN2
EN1
CSET2
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.
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 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.
7
8
VOUT2
VOUT1
January 2007
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M9999-011608-A
Micrel, Inc.
MIC5332
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ............................................. 0V to +6V
Enable Input Voltage (V
EN1
, V
EN2
) .......................... 0V to V
IN
POR2 Voltage (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 Rating
(4)
.................................................................. 2kV
Operating Ratings
(2)
Supply Voltage (V
IN
)..................................... +2.3V to +5.5V
Enable Input Voltage (V
EN1
, V
EN2
) .......................... 0V to V
IN
POR2 Voltage (V
POR2
) ....................................... 0V to +5.5V
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
Min
–1.0
Typ
Max
+1.0
Units
%
%
%/V
%/V
%
mV
mV
µA
µA
µA
µA
dB
dB
–2.0
0.02
0.2
20
120
25
25
40
0.01
65
45
350
550
50
+2.0
0.3
0.6
0.5
40
240
50
50
75
1.0
Ground Current in Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
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
800
mA
µV
RMS
Enable Inputs (EN1/EN2 )
Enable Input Voltage
Enable Input Current
0.2
1.2
0.01
0.01
140
110
88
98
0.02
V
V
µA
µA
µs
µs
%
%
V
µA
V
IL
≤
0.2V
V
IH
≥
1.2V
1.0
1.0
500
500
Turn-on Time
Turn-on Time (LDO1 and 2)
C
OUT
= 1µF (Enable of First LDO)
C
OUT
= 1µF (Enable of Second LDO after First Enabled)
POR2 Output (LDO2 only)
V
TH
V
OL
I
POR2
Low Threshold, % of V
OUT2
(POR2 ON)
High Threshold, % of V
OUT2
(POR2 OFF)
POR2 Output Logic Low Voltage; IL = 250µA
POR2 Leakage Current, POR2 OFF
0.1
+1.0
–1.0
0.01
January 2007
3
M9999-011608-A
Micrel, Inc.
Parameter
CSET2 INPUT
CSET2 Pin Current Source
CSET2 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.
MIC5332
Condition
V
CSET2
= 0V
POR2 = 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.
January 2007
4
M9999-011608-A
Micrel, Inc.
MIC5332
Typical Characteristics
PSRR
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
V
IN
= 2.3V
V
OUT
= 1.2V
C
OUT
= 2.2µF
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
41
39
37
Ground Current
vs. Supply Voltage
Dual LDO Enabled
41
39
37
Ground Current
vs. Load Current
Dual LDO Enabled
100mA
50mA
10mA
V
OUT1
= 2.5V
35 V
OUT2
= 1.2V
C
OUT1
= 1µF
33
C
OUT2
= 1µF
31 I
OUT1
= 300mA
I
OUT2
= 300mA
29
27
25
2.5
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
Single LDO Enabled
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
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
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
33
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
2.5
Current Limit
vs. Supply Voltage
POR2 Delay vs. CSET2
100K
1.2
1.0
Output Noise
Spectral Density
V
IN
= V
OUT
+ 1V
V
OUT
= 2.8V
C
OUT
= 1µF
Load = 50mA
10K
LDO2
0.8
0.6
1K
C
IN
= 1µF
C
OUT
= 1µF
3
3.5
4
4.5
5
SUPPLY VOLTAGE (V)
5.5
0.4
100
100
V
IN
= 3.6V
V
OUT
= 1.2V
C
OUT
= 1µF
1K
10K
CSET2 (pF)
100K
0.2
0
10
100
1K
10K 100K
FREQUENCY (Hz)
1M
January 2007
5
M9999-011608-A
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