MICREL MIC5332

MIC5332
Micro-Power High Performance
Dual 300mA ULDO™
General Description
Features
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.
•
•
•
•
•
•
•
•
•
•
•
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
MIC5332-xxYMT
10k
VIN
VOUT1
VI/O
EN1
VOUT2
VCORE
EN2
VBAT
CSET2
CIN
1µF
/RST
POR2
GND
1µF
1µF
µProcessor
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
April 2008
M9999-042108-B
Micrel, Inc.
MIC5332
Ordering Information
Marking
Code
Part Number
Manufacturing
Part Number
Voltage
Junction
Temperature Range
Package
MIC5332-1.8/1.2YMT
WG4
MIC5332-G4YMT
1.8V/1.2V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF®
MIC5332-2.5/1.2YMT
WJ4
MIC5332-J4YMT
2.5V/1.2V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF®
MIC5332-2.8/2.8YMT
WMM
MIC5332-MMYMT
2.8V/2.8V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF®
MIC5332-2.8/2.85YMT
WMN
MIC5332-MNYMT
2.8V/2.85V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF®
MIC5332-2.85/2.85YMT
WNN
MIC5332-NNYMT
2.85V/2.85V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF®
MIC5332-3.0/2.8YMT
WPM
MIC5332-PMYMT
3.0V/2.8V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF®
MIC5332-3.0/2.85YMT
WPN
MIC5332-PNYMT
3.0V/2.85V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF®
MIC5332-3.0/3.0YMT
WPP
MIC5332-PPYMT
3.0V/3.0V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF®
Notes
For other voltage options. Contact Micrel Marketing for details.
▲
Pin 1 identifier = .
®
MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
VIN
1
8
VOUT1
GND
2
7
VOUT2
POR2
3
6
CSET2
EN2
4
5
EN1
8-Pin 2mm x 2mm Thin MLF® (MT)
(Top View)
Pin Description
Pin Number
Pin Name
Pin Function
1
VIN
Supply Input.
April 2008
2
GND
Ground.
3
POR2
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.
4
EN2
Enable Input (Regulator 2): Active High Input. Logic High = On; Logic Low =
Off. Do not leave floating.
5
EN1
Enable Input (Regulator 1): Active High Input. Logic High = On; Logic Low =
Off. Do not leave floating.
6
CSET2
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.
7
VOUT2
Regulator Output – LDO2.
8
VOUT1
Regulator Output – LDO1.
2
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Micrel, Inc.
MIC5332
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN) ............................................. 0V to +6V
Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN
POR2 Voltage (VPOR2) .......................................... 0V to +6V
Power Dissipation .................................. Internally Limited(3)
Lead Temperature (soldering, 3sec.)......................... 260°C
Storage Temperature (Ts) .........................–65°C to +150°C
ESD Rating(4) .................................................................. 2kV
Supply Voltage (VIN)..................................... +2.3V to +5.5V
Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN
POR2 Voltage (VPOR2) ....................................... 0V to +5.5V
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
2mm x 2mm Thin MLF-8 (θJA) ...........................90°C/W
Electrical Characteristics(5)
VIN = VEN1 = VEN2 = VOUT + 1.0V, higher of the two regulator outputs; IOUT1 = IOUT2 = 100µA; COUT1 = COUT2 = 1µF;
TJ = 25°C, bold values indicate –40°C < TJ < +125°C; unless noted.
Parameter
Output Voltage Accuracy
Condition
Min
Typ
Max
Units
Variation from nominal VOUT
–1.0
+1.0
%
Variation from nominal VOUT; –40°C to +125°C
–2.0
+2.0
%
Line Regulation
VIN = VOUT +1V to 5.5V; IOUT = 100µA
0.02
0.3
0.6
%/V
%/V
Load Regulation
IOUT = 100µA to 300mA
0.2
0.5
%
Dropout Voltage
IOUT = 50mA
20
40
mV
IOUT = 300mA
120
240
mV
Ground Current
VEN1 = High; VEN2 = Low; IOUT = 100µA to 300mA
25
50
µA
VEN1 = Low; VEN2 = High; IOUT = 100µA to 300mA
25
50
µA
40
75
µA
0.01
1.0
µA
VEN1 = VEN2 = High; IOUT1= 300mA, IOUT2 = 300mA
Ground Current in Shutdown
VEN1 = VEN2 < 0.2V
Ripple Rejection
f = 1kHz; COUT = 2.2µF;
65
f = 20kHz; COUT = 2.2µF;
Current Limit
VOUT = 0V
Output Voltage Noise
COUT=1µF, 10Hz to 100kHz
dB
45
350
550
dB
800
50
mA
µVRMS
Enable Inputs (EN1/EN2 )
Enable Input Voltage
0.2
Logic Low
1.2
Logic High
Enable Input Current
V
V
VIL ≤ 0.2V
0.01
1.0
µA
VIH ≥ 1.2V
0.01
1.0
µA
COUT = 1µF (Enable of First LDO)
140
500
µs
COUT = 1µF (Enable of Second LDO after First Enabled)
110
500
µs
Turn-on Time
Turn-on Time (LDO1 and 2)
POR2 Output (LDO2 only)
VTH
Low Threshold, % of VOUT2 (POR2 ON)
88
%
High Threshold, % of VOUT2 (POR2 OFF)
VOL
POR2 Output Logic Low Voltage; IL = 250µA
IPOR2
POR2 Leakage Current, POR2 OFF
April 2008
3
–1.0
98
%
0.02
0.1
V
0.01
+1.0
µA
M9999-042108-B
Micrel, Inc.
Parameter
MIC5332
Condition
Min
Typ
Max
Units
CSET2 Pin Current Source
VCSET2 = 0V
0.8
1.4
2
µA
CSET2 Pin Threshold Voltage
POR2 = High
1.21
1.25
1.29
V
CSET2 INPUT
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 TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. 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.
April 2008
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Micrel, Inc.
MIC5332
Typical Characteristics
PSRR
-100
-90
PSRR
0.14
-90
-80
50mA
-80
-70
-60
0.10
-60
-50
300mA
-50
-40
0.06
-30
-20 VIN = 2.3V
V
= 1.2V
-10 OUT
COUT = 2.2µF
0
-20 VIN = 2.3V
-10 VOUT = 1.2V
COUT = 1µF
0
0.18
Dropout Voltage
vs. Temperature
Ground Current
vs. Supply Voltage
41
39
300mA
0.08
100mA
0.06
0.04
50mA
0.02
10mA
Ground Current
vs. Temperature
39
300mA
EN1 = EN2 = VIN
VIN = VOUT + 1V
33
VOUT = 2.8V
COUT = 1µF
30
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
April 2008
Single LDO Enabled
27
3
3.5
4
4.5
5
SUPPLY VOLTAGE (V)
5.5
Output Voltage
vs. Load Current
25
0
3.0
2.9
2.812
2.8
2.808
2.7
2.800
0
Ground Current
vs. Load Current
Dual LDO Enabled
35 VIN = VOUT + 1V
VOUT1 = 2.5V
33 VOUT2 = 1.2V
31 COUT1 = 1µF
COUT2 = 1µF
29
2.816
2.804
50 100 150 200 250 300
LOAD CURRENT (mA)
37
VIN = VOUT + 1V
VOUT = 2.8V
COUT = 1µF
50 100 150 200 250 300
LOAD CURRENT (mA)
100K
2.6
1.2
10K
Single LDO Enabled
50 100 150 200 250 300
LOAD CURRENT (mA)
Output Voltage
vs. Temperature
VIN = VOUT + 1V
VOUT = 2.8V
COUT = 1µF
2.5
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
1.0
650
600
400
350
2.5
39
POR2 Delay vs. CSET2
Current Limit
vs. Supply Voltage
800
750
700
550
500
450
25
2.5
2.820
42
100mA
41
Dual LDO Enabled
VOUT1 = 2.5V
35 VOUT2 = 1.2V
COUT1 = 1µF
33
COUT2 = 1µF
31 IOUT1 = 300mA
IOUT2 = 300mA
29
27
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
10mA
0
0
37
0.12
VOUT = 2.8V
COUT = 1µF
0.02
FREQUENCY (Hz)
0.10
850
0.04
FREQUENCY (Hz)
VOUT = 2.8V
0.16 COUT = 1µF
0.14
45
0.08
300mA
-40
-30
36
0.12
50mA
-70
Dropout Voltage
vs. Load Current
0.8
Output Noise
Spectral Density
VIN = VOUT + 1V
VOUT = 2.8V
COUT = 1µF
Load = 50mA
LDO2
0.6
0.4
1K
CIN = 1µF
COUT = 1µF
3
3.5
4
4.5
5
SUPPLY VOLTAGE (V)
5.5
100
100
VIN = 3.6V
VOUT = 1.2V
COUT = 1µF
1K
10K
CSET2 (pF)
5
100K
0.2
0
10
100
1K
10K 100K
FREQUENCY (Hz)
1M
M9999-042108-B
Micrel, Inc.
MIC5332
Functional Characteristics
April 2008
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M9999-042108-B
Micrel, Inc.
MIC5332
Functional Diagram
VIN
VOUT1
LDO1
LDO2
EN1
EN2
Reference
Enable
Thermal
Shutdown
POR
Delay
VOUT2
POR2
CSET2
GND
MIC5332 Block Diagram
April 2008
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Micrel, Inc.
MIC5332
the enable pin cannot be left floating; a floating enable
pin may cause an indeterminate state on the output.
Application Information
MIC5332 is a dual 300mA LDO, with an integrated
Power On Reset (POR) for the second regulator. The
MIC5332 regulator is fully protected from damage due to
fault conditions, offering linear current limiting and
thermal shutdown.
Power On Reset
The second regulator has a Power On Reset status pin
(POR2). This pin is an open drain output. When LDO2 is
enabled an active low POR2 indicates an under voltage
condition on VOUT2.
The POR2 status signal can be programmed for a delay
of 1sec/µF by placing a capacitor from the CSET2 pin to
ground. Zero delay is added by leaving the CSET2 pin
open circuit.
Input Capacitor
The MIC5332 is a high-performance, high bandwidth
device. Therefore, it requires a well-bypassed input
supply for optimal performance. A 1µF capacitor is
required from the input to ground to provide stability.
Low-ESR
ceramic
capacitors
provide
optimal
performance at a minimum of space. Additional highfrequency capacitors, such as small-valued NPO
dielectric-type capacitors, help filter out high-frequency
noise and are good practice in any RF-based circuit.
X5R or X7R dielectrics are recommended for the input
capacitor. Y5V dielectrics lose most of their capacitance
over temperature and are therefore, not recommended.
Thermal Considerations
The MIC5332 is designed to provide 300mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature can
be calculated based upon the output current and the
voltage drop across the part. For example if the input
voltage is 3.6V, the output voltage is 3.0V for VOUT1, 2.8V
for VOUT2 and the output current = 300mA. The actual
power dissipation of the regulator circuit can be
determined using the equation:
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I OUT2 + VIN IGND
Because this device is CMOS and the ground current is
typically <100µA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
PD = (3.6V – 3.0V) × 300mA + (3.6V -2.8) × 300mA
PD = 0.42W
To determine the maximum ambient operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
Output Capacitor
The MIC5332 requires an output capacitor of 1µF or
greater to maintain stability. The design is optimized for
use with low-ESR ceramic chip capacitors. High ESR
capacitors may cause high frequency oscillation. The
output capacitor can be increased, but performance has
been optimized for a 1µF ceramic output capacitor and
does not improve significantly with larger capacitance.
X7R/X5R dielectric-type ceramic capacitors are
recommended
because
of
their
temperature
performance. X7R-type capacitors change capacitance
by 15% over their operating temperature range and are
the most stable type of ceramic capacitors. Z5U and
Y5V dielectric capacitors change value by as much as
50% and 60%, respectively, over their operating
temperature ranges. To use a ceramic chip capacitor
with Y5V dielectric, the value must be much higher than
an X7R ceramic capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
⎛ TJ(MAX) − TA
PD(MAX) = ⎜⎜
θ JA
⎝
TJ(max) = 125°C, and the maximum junction temperature
of the die, θJA, thermal resistance = 90°C/W.
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit. The junction-toambient thermal resistance for the minimum footprint is
90°C/W.
The maximum power dissipation must not be exceeded
for proper operation.
For example, when operating the MIC5332-PMYMT at
an input voltage of 3.6V and 300mA loads at each output
with a minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
0.42W = (125°C – TA)/(90°C/W)
TA = 87.2°C
No-Load Stability
Unlike many other voltage regulators, the MIC5332 will
remain stable and in regulation with no load. This is
especially import in CMOS RAM keep-alive applications.
Enable/Shutdown
The MIC5332 comes with dual active-high enable pins
that allow each regulator to be disabled independently.
Forcing the enable pin low disables the regulator and
sends it into a “zero” off-mode-current state. In this state,
current consumed by the regulator goes nearly to zero.
Forcing the enable pin high enables the output voltage.
The active-high enable pin uses CMOS technology and
April 2008
⎞
⎟
⎟
⎠
8
M9999-042108-B
Micrel, Inc.
MIC5332
Therefore, a 3.0V/2.8V application with 300mA at each
output current can accept an ambient operating
temperature of 87°C in a 2mm x 2mm MLF® package.
For a full discussion of heat sinking and thermal effects
on voltage regulators, refer to the “Regulator Thermals”
April 2008
section of Micrel’s Designing with Low-Dropout Voltage
Regulators handbook. This information can be found on
Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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M9999-042108-B
Micrel, Inc.
MIC5332
MIC5332 Typical Application Circuit
U1
MIC5332-xxYMT
VIN
J1
VIN
1
R3
10k
R2
10k
J3
POR
J4
EN2
VOUT1
POR2
VOUT2
8
J6
VOUT1
7
J8
VOUT2
R1
10k
3
4
J5
EN1
VIN
5
EN2
EN1
CSET2
GND
C1
1µF
2
6
C4
0.1µF
C2
1µF
C3
1µF
J2
GND
J7
GND
Bill of Materials
Item
Part Number
C1, C2, C3
C1608X5R0J105K
C4
VJ0603Y104KXXAT
Manufacturer
(1)
TDK
(2)
Vishay
Description
Qty
Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603
3
Capacitor, 0.1µF Ceramic, 10V, X7R, Size 0603
1
(2)
Resistor, 10kΩ, 1%, 1/16W, Size 0603
(3)
UCAP LDO, Dual 300mA, Size 2mm x 2mm Thin MLF
R1, R2, R3
CRCW06031002FKEYE3
Vishay
U1
MIC5332-XXYMT
Micrel
3
®
1
Notes:
1.
TDK: www.tdk.com
2.
Vishay: www.vishay.com
3.
Micrel, Inc.: www.micrel.com
April 2008
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M9999-042108-B
Micrel, Inc.
MIC5332
PCB Layout Recommendations
1350 (mil)
1400 (mil)
Top Layer
1350 (mil)
1400 (mil)
Bottom Layer
April 2008
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M9999-042108-B
Micrel, Inc.
MIC5332
Package Information
®
8-Pin 2mm x 2mm Thin MLF (MT)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2007 Micrel, Incorporated.
April 2008
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