MIC5332-1.2YMT [MICREL]
Micro-Power High Performance Dual 300mA ULDO⑩; 微功耗高性能双路，300mA， ULDO⑩
| 型号： | MIC5332-1.2YMT |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | Micro-Power High Performance Dual 300mA ULDO⑩ |
| 文件： | 总12页 (文件大小：337K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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.
• 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
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.
• Current limit protection
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.
Applications
• Camera phones
• Mobile phones
• PDAs
• GPS receivers
• Portable devices
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
10k
MIC5332-xxYMT
VOUT1
VOUT2
VI/O
VIN
VCORE
EN1
EN2
VBAT
/RST
POR2
CSET2
CIN
1µF
GND
µProcessor
1µF
1µF
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
M9999-011608-A
January 2007
Micrel, Inc.
MIC5332
Ordering Information
Part Number
Manufacturing
Part Number
Voltage
Junction
Temperature Range
Package
MIC5332-2.5/1.2YMT
MIC5332-2.8/2.8YMT
MIC5332-2.8/2.85YMT
MIC5332-J4YMT
MIC5332-MMYMT
MIC5332-MNYMT
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
–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
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®
MIC5332-2.85/2.85YMT MIC5332-NNYMT
MIC5332-3.0/2.8YMT
MIC5332-3.0/2.85YMT
MIC5332-3.0/3.0YMT
MIC5332-PMYMT
MIC5332-PNYMT
MIC5332-PPYMT
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
Pin Name
VIN
Pin Function
1
2
3
Supply Input.
Ground.
GND
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
5
6
EN2
EN1
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.
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
8
VOUT2
VOUT1
Regulator Output – LDO2.
Regulator Output – LDO1.
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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
Condition
Min
–1.0
–2.0
Typ
Max
+1.0
+2.0
Units
%
Output Voltage Accuracy
Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
VIN = VOUT +1V to 5.5V; IOUT = 100µA
%
Line Regulation
0.02
0.3
0.6
%/V
%/V
Load Regulation
Dropout Voltage
IOUT = 100µA to 300mA
IOUT = 50mA
0.2
20
0.5
40
%
mV
mV
µA
I
OUT = 300mA
VEN1 = High; VEN2 = Low; IOUT = 100µA to 300mA
EN1 = Low; VEN2 = High; IOUT = 100µA to 300mA
120
25
240
50
Ground Current
V
25
50
µA
VEN1 = VEN2 = High; IOUT1= 300mA, IOUT2 = 300mA
VEN1 = VEN2 < 0.2V
40
75
µA
Ground Current in Shutdown
Ripple Rejection
0.01
65
1.0
µA
f = 1kHz; COUT = 2.2µF;
f = 20kHz; COUT = 2.2µF;
VOUT = 0V
dB
45
dB
Current Limit
350
550
50
800
mA
µVRMS
Output Voltage Noise
Enable Inputs (EN1/EN2 )
Enable Input Voltage
COUT=1µF, 10Hz to 100kHz
Logic Low
Logic High
VIL ≤ 0.2V
VIH ≥ 1.2V
0.2
V
V
1.2
Enable Input Current
0.01
0.01
1.0
1.0
µA
µA
Turn-on Time
Turn-on Time (LDO1 and 2)
COUT = 1µF (Enable of First LDO)
140
110
500
500
µs
µs
COUT = 1µF (Enable of Second LDO after First Enabled)
POR2 Output (LDO2 only)
VTH
Low Threshold, % of VOUT2 (POR2 ON)
High Threshold, % of VOUT2 (POR2 OFF)
POR2 Output Logic Low Voltage; IL = 250µA
POR2 Leakage Current, POR2 OFF
88
%
%
V
98
0.1
VOL
0.02
0.01
IPOR2
–1.0
+1.0
µA
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MIC5332
Parameter
Condition
Min
Typ
Max
Units
CSET2 INPUT
CSET2 Pin Current Source
CSET2 Pin Threshold Voltage
Notes:
VCSET2 = 0V
0.8
1.4
2
µA
V
POR2 = High
1.21
1.25
1.29
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.
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MIC5332
Typical Characteristics
PSRR
PSRR
Dropout Voltage
vs. Load Current
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
-90
50mA
-80
50mA
-70
-60
300mA
= 2.3V
300mA
-50
-40
-30
-20
-10
0
V
V
C
= 2.3V
V
V
IN
IN
V
= 2.8V
OUT
= 1.2V
= 1.2V
= 1µF
OUT
OUT
C
OUT
C
= 1µF
OUT
= 2.2µF
OUT
0
50 100 150 200 250 300
LOAD CURRENT (mA)
FREQUENCY (Hz)
FREQUENCY (Hz)
Ground Current
vs. Supply Voltage
Dropout Voltage
vs. Temperature
Ground Current
vs. Load Current
41
39
37
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
41
39
37
35
33
31
29
27
25
V
C
= 2.8V
= 1µF
OUT
Dual LDO Enabled
OUT
Dual LDO Enabled
300mA
V
= 2.5V
= 1.2V
= 1µF
= 1µF
OUT1
OUT2
OUT1
OUT2
V
V
V
C
C
= V
+ 1V
OUT
IN
35 V
C
= 2.5V
= 1.2V
= 1µF
= 1µF
OUT1
OUT2
33
C
I
OUT1
OUT2
= 300mA
= 300mA
100mA
31 OUT1
I
OUT2
29
27
25
50mA
10mA
Single LDO Enabled
Single LDO Enabled
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
0
50 100 150 200 250 300
LOAD CURRENT (mA)
2.5
3
3.5
4
4.5
5
5.5
SUPPLY VOLTAGE (V)
Output Voltage
vs. Load Current
Output Voltage
vs. Temperature
Ground Current
vs. Temperature
2.820
3.0
2.9
2.8
2.7
2.6
2.5
45
42
39
36
33
30
2.816
2.812
2.808
2.804
2.800
10mA
100mA
300mA
EN1 = EN2 = V
IN
V
V
C
= V
1V
OUT +
V
V
C
= V
+ 1V
OUT
V
V
C
= V
+ 1V
OUT
IN
IN
IN
= 2.8V
= 1µF
= 2.8V
= 1µF
= 2.8V
= 1µF
OUT
OUT
OUT
OUT
OUT
OUT
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
0
50 100 150 200 250 300
LOAD CURRENT (mA)
POR2 Delay vs. CSET2
Current Limit
Output Noise
vs. Supply Voltage
Spectral Density
100K
10K
1K
850
800
750
700
650
600
550
500
450
400
350
1.2
V
V
C
= V
+ 1V
OUT
IN
= 2.8V
= 1µF
OUT
1.0
0.8
0.6
0.4
0.2
0
OUT
Load = 50mA
LDO2
V
V
C
OUT
= 3.6V
IN
C
C
= 1µF
= 1µF
= 1.2V
= 1µF
IN
OUT
OUT
100
2.5
3
3.5
4
4.5
5
5.5
10
100
1K
10K 100K 1M
100
1K
10K
100K
SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
CSET2 (pF)
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Micrel, Inc.
MIC5332
Functional Characteristics
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Micrel, Inc.
MIC5332
Functional Diagram
VOUT1
VOUT2
VIN
LDO1
LDO2
EN1
EN2
Reference
Enable
Thermal
Shutdown
POR
Delay
POR2
CSET2
GND
MIC5332 Block Diagram
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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
.
Input Capacitor
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.
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
Thermal Considerations
performance at a minimum of space. Additional high-
frequency 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.
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:
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.
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
X7R/X5R dielectric-type ceramic capacitors are
recommended
because
of
their
temperature
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:
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.
T
− TA
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
J(MAX)
PD(MAX)
=
θJA
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-to-
ambient thermal resistance for the minimum footprint is
90°C/W.
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.
The maximum power dissipation must not be exceeded
for proper operation.
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
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
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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”
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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January 2007
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Micrel, Inc.
MIC5332
MIC5332 Typical Application Circuit
U1
MIC5332-xxYMT
VIN
J6
VOUT1
J1
VIN
1
8
7
VIN
VOUT1
R3
R2
R1
10k 10k 10k
3
J3
POR
J4
J8
VOUT2
VOUT2
CSET2
POR2
EN2
4
5
EN2
J5
EN1
6
EN1
C1
GND
C4
C3
C2
1µF
0.1µF
1µF
1µF
2
J2
J7
GND
GND
Bill of Materials
Item
C1, C2, C3
C4
Part Number
C1608X5R0J105K
VJ0603Y104KXXAT
CRCW06031002FKEYE3
MIC5332-XXYMT
Manufacturer
TDK(1)
Description
Qty
3
Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603
Capacitor, 0.1µF Ceramic, 10V, X7R, Size 0603
Resistor, 10kꢀ, 1%, 1/16W, Size 0603
Vishay(2)
Vishay(2)
Micrel(3)
1
R1, R2, R3
U1
3
UCAP LDO, Dual 300mA, Size 2mm x 2mm Thin MLF®
1
Notes:
1. TDK: www.tdk.com
2. Vishay: www.vishay.com
3. Micrel, Inc.: www.micrel.com
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Micrel, Inc.
MIC5332
PCB Layout Recommendations
1400 (mil)
Top Layer
1400 (mil)
Bottom Layer
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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.
M9999-011608-A
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