MIC5333-2.85/2.85YMT-TR [MICROCHIP]
FIXED POSITIVE LDO REGULATOR;
| 型号： | MIC5333-2.85/2.85YMT-TR |
| 厂家： | 
MICROCHIP |
| 描述： | FIXED POSITIVE LDO REGULATOR |
| 文件： | 总12页 (文件大小：344K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5333
Micro-Power High Performance
Dual 300mA ULDO™ with Dual POR
General Description
Features
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.
• 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
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.
• Current limit protection
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.
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
100k 100k
MIC5333-xxYMT
VOUT1
I/O
VIN
CORE
EN1
VOUT2
POR1
POR2
/RST I/O
EN2
VBAT
/RST CORE
CSET1
CSET2
Camera DSP
1µF 1µF
1µF
GND
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
M9999-021408-A
February 2008
Micrel, Inc.
MIC5333
Ordering Information
Part Number
Manufacturing
Marking
Voltage
Junction
Package
Part Number
MIC5333-J4YMT
MIC5333-MMYMT
MIC5333-MNYMT
Temperature Range
MIC5333-2.5/1.2YMT
MIC5333-2.8/2.8YMT
MIC5333-2.8/2.85YMT
XJ4
XMM
XMN
XNN
XPM
XPN
XPP
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
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®
MIC5333-2.85/2.85YMT MIC5333-NNYMT
MIC5333-3.0/2.8YMT
MIC5333-3.0/2.85YMT
MIC5333-3.0/3.0YMT
MIC5333-PMYMT
MIC5333-PNYMT
MIC5333-PPYMT
Note: Other voltage options available. Contact Micrel for details.
Pin Configuration
VIN
GND
1
2
3
4
5
10 VOUT1
9
8
7
6
VOUT2
CSET2
CSET1
EN1
POR2
POR1
EN2
10-Pin 2.5mm x 2.5mm Thin MLF® (MT)
(Top View)
Pin Description
Pin Number
Pin Name
VIN
Pin Function
Supply Input.
Ground.
1
2
3
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
7
POR1
EN2
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.
EN1
Enable Input (Regulator 1): Active High Input. Logic High = On; Logic Low =
Off. Do not leave floating.
CSET1
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.
8
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.
9
VOUT2
VOUT1
Regulator Output – LDO2.
Regulator Output – LDO1.
10
M9999-021408-A
February 2008
2
Micrel, Inc.
MIC5333
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)............................................. 0V to +6V
Enable Input Voltage (VEN1, VEN2) ..........................0V to VIN
POR Voltage (VPOR1, VPOR2) ................................. 0V to +6V
Power Dissipation ..................................Internally Limited(3)
Lead Temperature (soldering, 3sec.)......................... 260°C
Storage Temperature (Ts) .........................–65°C to +150°C
ESD Sensitive(4)
Supply Voltage (VIN)..................................... +2.3V to +5.5V
Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN
POR Voltage (VPOR1, VPOR2) .............................. 0V to +5.5V
Junction Temperature (TJ) ........................–40°C to +125°C
Junction Thermal Resistance
2.5mm x 2.5mm Thin MLF-10 (θJA) ...................75°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
0.3
0.6
0.5
40
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
%/V
%/V
%
Load Regulation
Dropout Voltage
IOUT = 100µA to 300mA
IOUT = 50mA
0.2
20
mV
mV
µA
I
OUT = 300mA
120
25
240
50
Ground Current
VEN1 = High; VEN2 = Low; IOUT = 100µA to 300mA
V
V
EN1 = Low; VEN2 = High; IOUT = 100µA to 300mA
EN1 = VEN2 = High; IOUT1= 300mA, IOUT2 = 300mA
25
50
µA
40
75
µA
Ground Current in Shutdown
Ripple Rejection
VEN1 = VEN2 < 0.2V
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
0.2
V
V
1.2
Enable Input Current
0.01
0.01
1.0
1.0
µA
µA
V
IH ≥ 1.2V
Turn-on Time
Turn-on Time (LDO1 and 2)
COUT = 1µF (Enable of First LDO)
OUT = 1µF (Enable of Second LDO after First Enabled)
140
110
500
500
µs
µs
C
POR1/POR2 Output
VTH
Low Threshold, % of VOUT (POR ON)
High Threshold, % of VOUT (POR OFF)
POR Output Logic Low Voltage; IL = 250µA
POR Leakage Current, POR OFF
88
%
%
V
98
0.1
VOL
0.02
0.01
IPOR
–1.0
+1.0
µA
M9999-021408-A
February 2008
3
Micrel, Inc.
MIC5333
Parameter
Condition
Min
Typ
Max
Units
CSET1/CSET2 INPUT
CSET Pin Current Source
CSET Pin Threshold Voltage
Notes:
VCSET = 0V
0.8
1.4
2
µA
V
POR = 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.
M9999-021408-A
February 2008
4
Micrel, Inc.
MIC5333
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
C
IN
IN
V
= 2.8V
OUT
= 1.2V
= 1.2V
OUT
= 1µF
OUT
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
40
38
36
34
32
30
28
26
24
22
20
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
Dual LDO Enabled
V
C
= 2.8V
= 1µF
OUT
OUT
Dual LDO Enabled
300mA
V
V
C
C
= 2.5V
OUT1
= 1.2V
= 1µF
= 1µF
= 300mA
= 300mA
OUT2
V
V
V
C
C
= V
+ 1V
OUT
IN
OUT1
OUT2
= 2.5V
= 1.2V
= 1µF
= 1µF
OUT1
OUT2
I
I
OUT1
OUT2
OUT1
OUT2
100mA
Single LDO Enabled
50mA
10mA
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
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
2.816
2.812
2.808
2.804
2.800
3.0
2.9
2.8
2.7
2.6
2.5
45
42
39
36
33
30
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)
Current Limit
POR Delay vs. CSET
Output Noise
vs. Supply Voltage
Spectral Density
850
800
750
700
650
600
550
500
450
400
350
100K
10K
1K
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
V
V
C
= 3.6V
IN
= 1.2V
= 1µF
C
C
= 1µF
OUT
IN
= 1µF
OUT
OUT
100
100
1K
10K
100K
10
100
1K
10K 100K 1M
2
2.5
3
3.5
4
4.5
5
5.5
CSET (pF)
FREQUENCY (Hz)
SUPPLY VOLTAGE (V)
M9999-021408-A
February 2008
5
Micrel, Inc.
MIC5333
Functional Characteristics
M9999-021408-A
February 2008
6
Micrel, Inc.
MIC5333
Functional Diagram
MIC5333 Block Diagram
M9999-021408-A
February 2008
7
Micrel, Inc.
MIC5333
The active-high enable pin uses CMOS technology and
the enable pin cannot be left floating; a floating enable
pin may cause an indeterminate state on the output.
Application Information
MIC5333 is a dual 300mA LDO, with an integrated
Power On Reset (POR) for each of the regulators. The
MIC5333 regulator is fully protected from damage due to
fault conditions, offering linear current limiting and
thermal shutdown.
Power On Reset
Each of the regulator outputs has a Power On Reset
status pin (POR1/POR2). This pin is an open drain
output. When an LDO is enabled an active low POR
Input Capacitor
indicates an under voltage condition on VOUT
.
The MIC5333 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.
Each POR status signal can be programmed for a delay
of 1sec/µF by placing a capacitor from its associated
CSET pin to ground. Where the CSET1 pin sets the
delay for the POR1 output and the CSET2 pin sets the
delay for the POR2 output. Zero delay is added by
leaving the CSET1/2 pin open circuit.
Low-ESR
ceramic
capacitors
provide
optimal
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.
Thermal Considerations
The MIC5333 is designed to provide 300mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature can
be calculated based on 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 MIC5333 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.
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.
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:
T
− TA
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
J(MAX)
PD(MAX)
=
θJA
TJ(max) = 125°C, and the maximum junction temperature
of the die, θJA, thermal resistance = 75°C/W.
No-Load Stability
Unlike many other voltage regulators, the MIC5333 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
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
75°C/W.
Enable/Shutdown
The maximum power dissipation must not be exceeded
for proper operation.
The MIC5333 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.
For example, when operating the MIC5333-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:
M9999-021408-A
February 2008
8
Micrel, Inc.
0.42W = (125°C – TA)/(75°C/W)
MIC5333
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:
TA = 93.5°C
Therefore, a 3.0V/2.8V application with 300mA at each
output current can accept an ambient operating
temperature of 93.5°C in a 2.5mm x 2.5mm MLF®
package. For a full discussion of heat sinking and
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
M9999-021408-A
February 2008
9
Micrel, Inc.
MIC5333
MIC5333 Typical Application Circuit
U1
MIC5333-xxYMT
VIN
J8
VOUT1
J1
VIN
1
10
VIN
VOUT1
R2
R1
100k 100k
3
4
5
6
9
8
7
J7
VOUT2
J3 - POR2
J4 - POR1
J5 - EN2
J6 - EN1
VOUT2
CSET2
POR2
POR1
EN2
EN1
CSET1
GND
C2
0.1µF
C3
0.1µF
C1
1µF
C4
1µF
C5
1µF
2
J10
GND
J2 - GND
J9 - GND
Bill of Materials
Item
C1, C4, C5
C2, C3
R1, R2
U1
Part Number
Manufacturer
TDK(1)
Description
Qty
3
C1608X5R0J105K
VJ0603Y104KXXAT
CRCW06031003FRT1
MIC5333-XXYMT
Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603
Capacitor, 0.1µF Ceramic, 10V, X7R, Size 0603
Resistor, 100kꢀ, 1%, 1/16W, Size 0603
Vishay(2)
Vishay(2)
Micrel(3)
2
2
UCAP LDO, Dual 300mA with dual POR, 2.5mm x 2.5mm Thin MLF®
1
Notes:
1. TDK: www.tdk.com
2. Vishay: www.vishay.com
3. Micrel, Inc.: www.micrel.com
M9999-021408-A
February 2008
10
Micrel, Inc.
MIC5333
PCB Layout Recommendations
1200 (mil)
Top Layer
1200 (mil)
Bottom Layer
M9999-021408-A
February 2008
11
Micrel, Inc.
MIC5333
Package Information
10-Pin 2.5mm x 2.5mm 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.
© 2008 Micrel, Incorporated.
M9999-021408-A
February 2008
12
相关型号：
©2020 ICPDF网 联系我们和版权申明