LX8213-00ISE-TR [MICROSEMI]
Adjustable Positive LDO Regulator;
| 型号： | LX8213-00ISE-TR |
| 厂家： | 
Microsemi |
| 描述： | Adjustable Positive LDO Regulator |
| 文件： | 总11页 (文件大小：281K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
DESCRIPTION
KEY FEATURES
The LX8213 LDO regulator is part of
The LX8213 also exhibits low output 2.5V to 6V Wide Input Voltage
Range
regulator ICs using CMOS technology. The bandwidth. Power supply rejection exceeds Fixed Output at 1.2V or 3.3V
Microsemi’s family of positive voltage noise with only 60uVRMS over a 100kHz
device provides a compact and cost effective 65dB at 100Hz.
solution featuring low power consumption Other features of LX8213 include an
Adjustable Output Voltage Range
from 1.2V to 5.5V
over a wide supply voltage range, high output active low shutdown input with a 3MΩ Low Quiescent Current of Typical
voltage accuracy, low dropout, excellent line internal pull-down for low cost power 60uA
and load regulation, fast transient response, sequencing, internal soft-start circuitry to Low Dropout Voltage of Typical
and low noise.
The LX8213 operates over a wide input limit, and thermal overload protection.
voltage range of 2.5V to 6V, and consumes The LX8213 operates over -40˚C to
only 60uA typical quiescent current at no load +85˚C ambient temperature range and is
prevent inrush current, short circuit current
170mV at 3.3V 300mA
Stable with Low ESR 1uF
Input/Output Bypass Ceramic
Capacitors
and a low 0.1uA shutdown current. Output available in a tiny 5 pin SOT-23 ROHS Ultra Low Shutdown Current of
voltage options include fixed 1.2V, 3.3V, or compliant package.
an adjustable output voltage which may be
set from 1.2V to 5.5V. The LDO delivers up
to 300mA of output current, with a foldback
current limit of approximately 400mA. At
300mA load, dropout voltage measures only
170mV for a 3.3V output.
Tight load and line regulation is achieved
over the full output current and supply range.
The high bandwidth control loop provides fast
transient response to reduce output voltage
deviation using low cost external ceramic
capacitors in the 1uF range.
Typical 0.1uA
Low Output Noise of Typical
60uVRMS at VOUT=1.2V
Fast Transient Response
Shutdown Control Input
Foldback Current Limit
50mA Short Circuit Limit
Over Temperature Protection
Standard Package SOT-23
RoHS Compliant
APPLICATIONS
Battery Operated Systems
Set-Top Box
LCD TV’s
Routers
Video Cards
Hand Held Instruments
PACKAGE ORDER INFO
THERMAL DATA
θ
JA = 250 °C/W
Plastic SOT-23 5-pin
RoHS Compliant / Pb-free
SE
TA (°C)
THERMAL RESISTANCE-
JUNCTION TO AMBIENT
Junction Temperature Calculation:
TJ = TA + (PD x θJA).
The θJA numbers are guidelines for
the thermal performance of the
device/pc-board system. All of the
above assume no ambient airflow.
LX8213-00ISE (Adjustable) Marking “ADYWL”
LX8213-12ISE (1.2V Fixed Output) Marking “AKYWL”
LX8213-33ISE (3.3V Fixed Output) Marking “ALYWL”
*Marking explanation:
A
D
Y
W
L
-40 to +85
‘Y’
‘W’
‘L’
Output Reference.
Numerical single
digit year
reference.
(‘0’, ‘1’, ‘2’….’9')
Bi-weekly code.
Numerical single
digit sub-build lot
identity.
(‘A’ for 1st-2nd
‘AD’ – Adjustable Output
‘AK’ – 1.2V Fixed Output
‘AL’ – 3.3V Fixed Output
week,…….,’Z’ for 51th-
52th week)
(‘0’, ‘1’, ‘2’,….’9')
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8213-xxISE-TR)
Page 1
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
AABSOLUTE MAXIMUM RATINGS
PACKAGE PIN OUT
VIN.................................................................................................-0.3V to 6.5V
1
2
3
FB/NC
SHDN
GND
VIN
5
SHDN
Input......................................................................... -0.3V to VIN + 0.3V
Output Current........................................................................................ 450mA
Junction Temperature...............................................................................150°C
Storage Temperature Range..................................................... -65°C to 150°C
Peak Package Solder Reflow Temp. (40 seconds maximum exposure).260°C
VOUT
4
Note: Exceeding these ratings could cause damage to the device. All voltages
are with respect to ground. Currents are positive into and negative out
of the specified terminal.
SE PACKAGE
(Top View)
RoHS / Pb-free 100% Matte Tin Pin Finish
Name
Pin #
Description
Active Low Shutdown Input. Connect to VIN or a logic level high to enable the device. An internal
1
SHDN
3MΩ pull-down resistor disables the device when the SHDN pin is floating.
Ground. Connect to the local analog ground or to the circuit board ground plane to maximize thermal
dissipation. Bypass the input and output capacitors to this plane.
GND
2
Regulator Input. Operating voltage range is from 2.5V to 6V. Bypass VIN to GND with a 1uF
capacitor.
VIN
3
4
VOUT
Regulator Output. Bypass to GND with a 1uF capacitor.
FB
Feedback Input. For the adjustable output version (LX8213-00), the device output voltage can be set
from 1.2V to 5.5V by connecting FB to the center of a resistive voltage divider from VOUT to GND.
Note that FB regulates to 0.8V.
(Adjustable
Output Version)
5
5
N.C.
(Fixed Output
Version)
No Connect. For fixed output versions, pin 5 is a no connect.
Page 2
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
ELECTRICAL CHARACTERISTICS
LX8213-00ISE (Adjustable Output). Unless otherwise specified, the following specifications apply over the operating temperature of -40°C ≤ TA ≤
85°C with the following test conditions: VIN=(VOUT+1), VINMIN=2.5V, SHDN = HIGH, CIN=1μF, COUT=1μF
LX8213-00
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
`
LX8213–00ISE (ADJUSTABLE OUTPUT)
Reference Voltage
VREF
VIN
2.5V ≤ VIN ≤ 6V
0.784
2.5
0.8
0.816
6
V
V
Input Voltage
Maximum Output Current
Load Regulation
IOUT(MAX)
300
400
mA
ΔVOUT
/ VOUT
1mA ≤ IOUT ≤ 300mA
0.7
%
ΔVOUT
/ VOUT
(VOUT+0.5V) ≤ VIN ≤ 6V, VINMIN=2.5V,
IOUT=30mA
Line Regulation
Dropout Voltage
0.2
%
VDROP
VOUT=3.3V, IOUT=300mA, ΔVOUT=-1%
IOUT=0mA
170
300
mV
Quiescent Current
Shutdown Current
IQ
60
90
uA
uA
ISHDN
0.1
1.0
SHDN = LOW
f=100Hz
68
68
54
Ripple 1Vpp,
f=1kHz
Power Supply Rejection Ratio
PSRR
dB
VIN=3V
f=10kHz
Output Voltage Temperature
Coefficient
(ΔVOUT/VOUT)
/ΔT
±100
50
ppm/˚C
mA
IOUT=30mA, -40°C ≤ TA ≤ 85°C
Short Current Limit
Soft Start Time
ISHORT
tUP
VOUT=0V
50
uS
RMS Output Noise
VNOISE
TA=25˚C, 10Hz ≤ f ≤ 100kHz, VOUT=1.2V
60
uVRMS
Shutdown “High” Logic Threshold
(Device Enabled)
1.5
0
6
V
Shutdown “Low” Logic Threshold
(Device Disabled)
VOUT Discharge Internal MOSFET
RDS(ON)
Shutdown Internal Pull Down
Resistance
0.4
V
Ω
60
3
SHDN = LOW
MΩ
˚C
˚C
Thermal Shutdown
165
30
Thermal Shutdown Hysteresis
Page 3
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
ELECTRICAL CHARACTERISTICS
LX8213-12ISE/-33ISE (Fixed Output). Unless otherwise specified, the following specifications apply over the operating temperature of -40°C ≤ TA ≤
85°C with the following test conditions: VIN=2.5V for VOUT=1.2V, VIN=(VOUT+1V) for VOUT=3.3V, SHDN = HIGH, CIN=1μF, COUT=1μF
LX8213-12/33
Parameter
Symbol
Test Conditions
Units
Min
Typ
400
170
Max
`
LX8213-12ISE (1.2V), LX8213-33ISE (3.3V) (FIXED OUTPUT)
98%*
VOUT
102%*
VOUT
Output Voltage
VOUT
1mA ≤ IOUT ≤ 300mA
V
Input Voltage
VIN
2.5
6
V
Maximum Output Current
IOUT(MAX)
300
mA
ΔVOUT
/ VOUT
1mA ≤ IOUT ≤ 300mA
Load Regulation
0.7
%
2.5V ≤ VIN ≤ 6V for VOUT=1.2V,
(VOUT+0.5V) ≤ VIN ≤ 6V for VOUT=3.3V,
IOUT=30mA
ΔVOUT
/ VOUT
Line Regulation
Dropout Voltage
0.2
%
VDROP
VOUT=3.3V, IOUT=300mA, ΔVOUT=-1%
IOUT=0mA
300
mV
Quiescent Current
Shutdown Current
IQ
60
90
uA
uA
ISHDN
0.1
1.0
SHDN = LOW
f=100Hz
f=1kHz
f=10kHz
68
68
54
Ripple 1Vpp,
VIN=3V for VOUT=1.2V
VIN=4.3V for VOUT=3.3V
Power Supply Rejection Ratio
PSRR
dB
Output Voltage Temperature
Coefficient
(ΔVOUT/VOUT)
/ΔT
±100
50
ppm/˚C
mA
IOUT=30mA, -40°C ≤ TA ≤ 85°C
Short Current Limit
Soft Start Time
ISHORT
tUP
VOUT=0V
50
uS
Shutdown “High” Logic Threshold
(Device Enabled)
1.5
0
6
V
Shutdown “Low” Logic Threshold
(Device Disabled)
VOUT Discharge Internal MOSFET
RDS(ON)
Shutdown Internal Pull Down
Resistance
0.4
V
Ω
60
3
SHDN = LOW
MΩ
˚C
˚C
Thermal Shutdown
165
30
Thermal Shutdown Hysteresis
Page 4
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
TYPICAL CHARACTERISTICS @ 25°C
QUIESCENT CURRENT vs. INPUT VOLTAGE
QUIESCENT CURRENT vs. OUTPUT CURRENT
80
70
60
50
40
30
20
10
0
120
110
100
90
VOUT=1.2V, IOUT=0
VOUT=1.2V, VIN=2.5V
80
70
60
50
0
50
100
150
200
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
Output Current (mA)
Input Voltage (V)
LINE REGULATION
LOAD REGULATION
0.1
0.1
3.3V
3.3V, 2.5V
2.5V
1.8V
0.05
0
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.05
-0.1
-0.15
-0.2
-0.25
-0.3
1.2V, 1.8V
1.2V
IOUT=30mA
VIN=2.5V for VOUT=1.2V
VIN=VOUT+1V for VOUT=1.8V, 2.5V, 3.3V
2.5
3
3.5
4
4.5
5
5.5
6
0
50
100
150
200
250
300
Input Voltage (V)
Load Current (mA)
Page 5
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
T
Y
P
I
C
A
L
C
H
A
R
A
C
T
E
R
I
S
T
I
C
S
@
2
5
°
C
DROPOUT VOLTAGE vs. OUTPUT CURRENT
OUTPUT VOLTAGE vs. OUTPUT CURRENT
250
200
150
100
50
1.4
1.2
1
VIN=2.5V
VIN=3.3V
VOUT=1.2V, VIN=2.5V
0.8
0.6
0.4
0.2
0
VIN=5V
0
0
50
100
150
200
250
300
0
50 100 150 200 250 300 350 400 450 500 550 600
Output Current (mA)
Output Current (mA)
LOAD TRANSIENT RESPONSE
(1mA to 300mA)
LOAD TRANSIENT RESPONSE
(1mA to 300mA)
Channel 1 – 1.2V Output AC Coupled
Channel 4 – Output Current 1mA to 300mA,
Slew Rate = 0.02A/uS
Channel 1 – 3.3V Output AC Coupled
Channel 4 – Output Current 1mA to 300mA,
Slew Rate = 0.02A/uS
Page 6
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
TYPICAL CHARACTERISTICS @ 25°C
LINE TRANSIENT RESPONSE
LINE TRANSIENT RESPONSE
Channel 1 – 1.2V Output at 30mA, AC Coupled
Channel 3 – VIN 2.5V to 3.5V
Channel 1 – 3.3V Output at 30mA, AC Coupled
Channel 3 – VIN 3.75V to 5V
SOFT START WAVEFORM
SOFT START WAVEFORM
Channel 1 – 1.2V Output at No Load
Channel 2 – SHDN 0V to 2V
Channel 1 – 3.3V Output at No Load
Channel 2 – SHDN 0V to 2V
Page 7
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
TYPICAL CHARACTERISTICS @ 25°C
VREF VOLTAGE vs AMBIENT TEMPERATURE
POWER SUPPLY REJECTION RATIO
100
90
80
70
60
50
40
30
20
10
0
815
805
795
785
775
765
755
745
10mA
300mA
CIN=0, VOUT=1.2V,
VIN=2.5V
VOUT=1.2V, VIN=2.5V
-45 -30 -15
0
15
30
45
60
75
90
0.1
1
10
100
Ambient Temperature (C)
Frequency (kHz)
Page 8
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
SIMPLIFIED BLOCK DIAGRAM
Figure 1 – LX8213-00 (Adjustable Output) Simplified Block Diagram
APPLICATION SCHEMATIC
Figure 2 – LX8213-12/33 Fixed Output Version Application
Schematic
Figure 3 – LX8213–00 Adjustable Output Application
Schematic
Page 9
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
APPLICATION INFORMATION
Description
Foldback Current Limit
The LX8213 is a family of CMOS based LDO (Low Drop-Out)
regulators in a small 5 pin SOT-23 package that provides a
compact and cost effective solution. The LX8213 is offered with
fixed output voltages of 1.2V or 3.3V, in addition to an adjustable
The LX8213 uses a foldback current limit. When the load current
exceeds approximately 400mA, the output voltage is reduced
along with the output current, minimizing power dissipated and
protecting the device from excessive heating.
version with an output voltage range of 1.2V to 5.5V.
The
Short Circuit Current Protection
LX8213 features low power consumption over a wide supply
voltage range, high output voltage accuracy, low dropout,
excellent line and load regulation, fast transient response, and low
noise. Please refer to the Electrical Characteristics Table for the
specifications.
Under conditions where the output of the LX8213 is shorted to
ground, internal circuitry will limit the device to source only about
50mA.
Temperature Protection
The thermal protection shuts down the LX8213 when the junction
temperature exceeds approximately 165°C, with a hysteresis of
about 30˚C.
Input Capacitor
To improve load transient response and noise rejection, an
input bypass capacitor is recommended, but it is not required
for stability. There are no requirements for the ESR
(Equivalent Series Resistor) on the input capacitor, but
tolerance and temperature coefficient must be considered
when selecting the capacitor to ensure the capacitor will be
around 1µF over the entire operating temperature range.
Capacitors with X5R or X7R characteristics are recommended.
Thermal Consideration
Thermal shutdown protects the integrated circuit from thermal
overload caused from a rise in junction temperature during power
dissipation. This means the protection is intended for fault
protection only and not as a means of current or power limiting
during normal application usage. Proper thermal evaluation
should be done to ensure that the junction temperature dose not
exceed it’s maximum rating. Operating at the maximum TJ of
150°C can impact reliability. Due to variation in individual device
electrical characteristics and thermal resistance, the built in
thermal overload protection may be activated at power levels
slightly above or below the rated dissipation.
Output Capacitor
For stability of the regulator, use a minimum 1uF capacitor to
bypass from VOUT to GND. Note that the LX8213 is stable
using low ESR ceramic capacitors. Capacitors with X5R or
X7R characteristics generally perform well and are
recommended.
Power dissipation for regulator can be calculated using the
following equation:
Adjustable Output Voltage
PD = (VIN(MAX)-VOUT(MIN)) * IOUT(MAX)
The LX8213-00 output voltage can be set within the range of
1.2V to 5.5V by connecting the FB pin to an external resistor
divider (See Figure 3). The output voltage can be calculated
using:
(Note: power dissipation resulting from quiescent current is
negligible)
For the SOT23 package, thermal resistance, θJA is 250°C/W
when mounted on a FR4 copper clad PCB. Junction temperature
of the integrated circuit can be calculated using:
R1
⎡
⎤
VOUT = 0.8 1 +
⎢
⎣
⎥
⎦
R2
TJ = TA + TRISE, substituting: TA + (PD * θJA).
R2 is chosen to minimize the power dissipated by the resistor
divider network while providing enough FB input bias current.
A value of 8.06kΩ is recommended.
An example: Given conditions: TA = 25°C, VIN= 2.5V, VOUT= 1.2V,
IOUT= 200mA.
Calculated values:
Shutdown (SHDN )
Total Power dissipation PD(total) = (2.5-1.2) V * 0.2A =0.26W
Junction Temperature TJ = 25°C +(0.26W *250°C/W) = 90°C
The LX8213 includes an active low shutdown input (SHDN ).
When the SHDN pin is left floating, an internal pull down
resistor to GND of 3MΩ will automatically disable the device.
Upon shutdown, an internal MOSFET connected from VOUT
to GND will be turned ON to discharge the output capacitor.
To enable the regulator, set SHDN to logic high. If shutdown
capability is not required, connect SHDN pin to VIN. For
specification on minimum and maximum logic high levels,
please refer to the Electrical Characteristics Table.
Page 10
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PRODUCTION DATASHEET
LX8213
300mA Low Noise CMOS LDO Regulator
®
TM
PACKAGE DIMENSION
5 Pin Plastic SOT-23
SE
D
G
MILLIMETERS
INCHES
Dim
MIN
0.90
0.90
0.25
0.09
2.80
1.50
MAX
1.30
1.45
0.50
0.20
3.10
1.75
MIN
MAX
0.051
0.057
0.020
0.008
0.122
0.069
A
A1
B
C
D
E
F
G
H
I
0.035
0.035
0.010
0.004
0.110
0.059
H
E
0.95 BSC
1.90 BSC
0.038 BSC
0.075 BSC
2.60
0.35
0.00
3.00
0.55
0.15
0.102
0.014
0.000
0.118
0.022
0.006
A
A1
J
C
K
10° MAX
10° MAX
K
B
J
F
I
Note:
1. Dimensions do not include mold flash or protrusions;
these shall not exceed 0.155mm(.006”) on any side.
Lead dimension shall not include solder coverage.
Page 11
Copyright © 2009
Rev. 1.3, 2009-04-29
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
相关型号：
LX8221-BIDUX
Fixed/Adjustable Positive LDO Regulator, 2 Output, 2.475V1 Min, 2.525V1 Max, CMOS, PDSO10, PLASTIC, MSOP-10
MICROSEMI
©2020 ICPDF网 联系我们和版权申明