Microsemi LX8213-12ISE 300ma low noise cmos ldo regulator Datasheet

PRODUCTION DATASHEET
300mA Low Noise CMOS LDO Regulator
®
TM
DESCRIPTION
KEY FEATURES
The LX8213 also exhibits low output
noise with only 60uVRMS over a 100kHz
bandwidth. Power supply rejection exceeds
65dB at 100Hz.
Other features of LX8213 include an
active low shutdown input with a 3MΩ
internal pull-down for low cost power
sequencing, internal soft-start circuitry to
prevent inrush current, short circuit current
limit, and thermal overload protection.
The LX8213 operates over -40˚C to
+85˚C ambient temperature range and is
available in a tiny 5 pin SOT-23 ROHS
compliant package.
ƒ 2.5V to 6V Wide Input Voltage
Range
ƒ Fixed Output at 1.2V or 3.3V
ƒ Adjustable Output Voltage Range
from 1.2V to 5.5V
ƒ Low Quiescent Current of Typical
60uA
ƒ Low Dropout Voltage of Typical
170mV at 3.3V 300mA
ƒ Stable with Low ESR 1uF
Input/Output Bypass Ceramic
Capacitors
ƒ Ultra Low Shutdown Current of
Typical 0.1uA
ƒ Low Output Noise of Typical
60uVRMS at VOUT=1.2V
ƒ Fast Transient Response
ƒ Shutdown Control Input
ƒ Foldback Current Limit
ƒ 50mA Short Circuit Limit
ƒ Over Temperature Protection
ƒ Standard Package SOT-23
ƒ RoHS Compliant
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
APPLICATIONS
Battery Operated Systems
Set-Top Box
LCD TV’s
Routers
Video Cards
Hand Held Instruments
PACKAGE ORDER INFO
SE
THERMAL DATA
Plastic SOT-23
TA (°C)
θJA = 250 °C/W
5-pin
THERMAL RESISTANCEJUNCTION TO AMBIENT
RoHS Compliant / Pb-free
LX8213-00ISE (Adjustable) Marking “ADYWL”
LX8213-12ISE (1.2V Fixed Output) Marking “AKYWL”
LX8213-33ISE (3.3V Fixed Output) Marking “ALYWL”
Y
W
L
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.
-40 to +85
Output Reference.
‘AD’ – Adjustable Output
‘AK’ – 1.2V Fixed Output
‘AL’ – 3.3V Fixed Output
‘Y’
Numerical single
digit year
reference.
(‘0’, ‘1’, ‘2’….’9')
‘W’
Bi-weekly code.
(‘A’ for 1st-2nd
week,…….,’Z’ for 51th52th week)
‘L’
Numerical single
digit sub-build lot
identity.
(‘0’, ‘1’, ‘2’,….’9')
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8213-xxISE-TR)
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LX8213
*Marking explanation:
A
D
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The LX8213 LDO regulator is part of
Microsemi’s family of positive voltage
regulator ICs using CMOS technology. The
device provides a compact and cost effective
solution featuring 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.
The LX8213 operates over a wide input
voltage range of 2.5V to 6V, and consumes
only 60uA typical quiescent current at no load
and a low 0.1uA shutdown current. Output
voltage options include fixed 1.2V, 3.3V, or
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.
LX8213
LX8213
PRODUCTION DATASHEET
®
TM
300mA Low Noise CMOS LDO Regulator
AABSOLUTE MAXIMUM RATINGS
PACKAGE PIN OUT
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.
SHDN
1
GND
2
VIN
3
5
FB/NC
4
VOUT
SE PACKAGE
(Top View)
RoHS / Pb-free 100% Matte Tin Pin Finish
Name
Pin #
SHDN
1
GND
2
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.
VIN
3
Regulator Input. Operating voltage range is from 2.5V to 6V. Bypass VIN to GND with a 1uF
capacitor.
VOUT
4
Regulator Output. Bypass to GND with a 1uF capacitor.
FB
(Adjustable
Output Version)
5
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.
N.C.
(Fixed Output
Version)
5
No Connect. For fixed output versions, pin 5 is a no connect.
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VIN.................................................................................................-0.3V to 6.5V
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
Description
Active Low Shutdown Input. Connect to VIN or a logic level high to enable the device. An internal
3MΩ pull-down resistor disables the device when the SHDN pin is floating.
LX8213
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
LX8213
PRODUCTION DATASHEET
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 ≤
WWW . Microsemi .C OM
85°C with the following test conditions: VIN=(VOUT+1), VINMIN=2.5V, SHDN = HIGH, CIN=1μF, COUT=1μF
Parameter
`
Symbol
Test Conditions
Min
LX8213-00
Typ
Max
Units
LX8213–00ISE (ADJUSTABLE OUTPUT)
2.5V ≤ VIN ≤ 6V
0.784
Reference Voltage
VREF
Input Voltage
VIN
2.5
IOUT(MAX)
300
Maximum Output Current
Load Regulation
ΔVOUT
/ VOUT
1mA ≤ IOUT ≤ 300mA
Line Regulation
ΔVOUT
/ VOUT
(VOUT+0.5V) ≤ VIN ≤ 6V, VINMIN=2.5V,
IOUT=30mA
Dropout Voltage
VDROP
Quiescent Current
IQ
Shutdown Current
ISHDN
Power Supply Rejection Ratio
PSRR
Output Voltage Temperature
Coefficient
(ΔVOUT/VOUT)
/ΔT
Short Current Limit
ISHORT
Soft Start Time
VNOISE
Shutdown “High” Logic Threshold
(Device Enabled)
Shutdown “Low” Logic Threshold
(Device Disabled)
VOUT Discharge Internal MOSFET
RDS(ON)
Shutdown Internal Pull Down
Resistance
0.816
V
6
V
400
mA
0.7
%
0.2
%
VOUT=3.3V, IOUT=300mA, ΔVOUT=-1%
170
300
mV
IOUT=0mA
60
90
uA
SHDN = LOW
0.1
1.0
uA
Ripple 1Vpp,
VIN=3V
f=100Hz
f=1kHz
f=10kHz
IOUT=30mA, -40°C ≤ TA ≤ 85°C
VOUT=0V
tUP
RMS Output Noise
0.8
TA=25˚C, 10Hz ≤ f ≤ 100kHz, VOUT=1.2V
68
68
54
dB
±100
ppm/˚C
50
mA
50
uS
60
uVRMS
1.5
6
V
0
0.4
V
60
Ω
3
MΩ
Thermal Shutdown
165
˚C
Thermal Shutdown Hysteresis
30
˚C
SHDN = LOW
LX8213
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
LX8213
PRODUCTION DATASHEET
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 ≤
Parameter
`
Symbol
Test Conditions
Min
LX8213-12/33
Typ
Max
WWW . Microsemi .C OM
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
Units
LX8213-12ISE (1.2V), LX8213-33ISE (3.3V) (FIXED OUTPUT)
Output Voltage
98%*
VOUT
102%*
VOUT
V
VIN
2.5
6
V
IOUT(MAX)
300
VOUT
Input Voltage
Maximum Output Current
Load Regulation
ΔVOUT
/ VOUT
Line Regulation
ΔVOUT
/ VOUT
Dropout Voltage
VDROP
Quiescent Current
IQ
Shutdown Current
ISHDN
Power Supply Rejection Ratio
PSRR
Output Voltage Temperature
Coefficient
(ΔVOUT/VOUT)
/ΔT
Short Current Limit
ISHORT
Soft Start Time
1mA ≤ IOUT ≤ 300mA
1mA ≤ IOUT ≤ 300mA
2.5V ≤ VIN ≤ 6V for VOUT=1.2V,
(VOUT+0.5V) ≤ VIN ≤ 6V for VOUT=3.3V,
IOUT=30mA
mA
0.7
%
0.2
%
VOUT=3.3V, IOUT=300mA, ΔVOUT=-1%
170
300
mV
IOUT=0mA
60
90
uA
SHDN = LOW
0.1
1.0
uA
Ripple 1Vpp,
VIN=3V for VOUT=1.2V
VIN=4.3V for VOUT=3.3V
f=100Hz
f=1kHz
f=10kHz
IOUT=30mA, -40°C ≤ TA ≤ 85°C
VOUT=0V
tUP
Shutdown “High” Logic Threshold
(Device Enabled)
Shutdown “Low” Logic Threshold
(Device Disabled)
VOUT Discharge Internal MOSFET
RDS(ON)
Shutdown Internal Pull Down
Resistance
400
68
68
54
dB
±100
ppm/˚C
50
mA
50
uS
1.5
6
V
0
0.4
V
60
Ω
3
MΩ
Thermal Shutdown
165
˚C
Thermal Shutdown Hysteresis
30
˚C
SHDN = LOW
LX8213
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
LX8213
PRODUCTION DATASHEET
300mA Low Noise CMOS LDO Regulator
®
TM
TYPICAL CHARACTERISTICS @ 25°C
QUIESCENT CURRENT vs. OUTPUT CURRENT
80
120
VOUT=1.2V, IOUT=0
VOUT=1.2V, VIN=2.5V
110
Quiescent Current (uA)
Quiescent Current (uA)
70
60
50
40
30
20
100
90
80
70
60
10
50
0
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
0
6
50
100
150
200
Output Current (mA)
Input Voltage (V)
LINE REGULATION
LOAD REGULATION
0.1
0.1
3.3V, 2.5V
-0.1
-0.2
1.2V
-0.3
VIN=2.5V for VOUT=1.2V
VIN=VOUT+1V for VOUT=1.8V, 2.5V, 3.3V
-0.4
3.3V
0.05
VOU T C hange (% )
1.8V
0
VOU T C hange (% )
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QUIESCENT CURRENT vs. INPUT VOLTAGE
2.5V
0
-0.05
-0.1
1.2V, 1.8V
-0.15
-0.2
IOUT=30mA
-0.25
-0.3
-0.5
0
50
100
150
200
250
300
2.5
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Load Current (mA)
LX8213
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
PRODUCTION DATASHEET
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
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DROPOUT VOLTAGE vs. OUTPUT CURRENT
OUTPUT VOLTAGE vs. OUTPUT CURRENT
250
1.4
VIN=2.5V
200
150
OUTPUT VOLAGE (V)
Dropout Voltage (mV)
LX8213
VIN=3.3V
100
VIN=5V
50
1.2
VOUT=1.2V, VIN=2.5V
1
0.8
0.6
0.4
0.2
0
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
LOAD TRANSIENT RESPONSE
(1mA to 300mA)
(1mA to 300mA)
Channel 1 – 3.3V Output AC Coupled
Channel 4 – Output Current 1mA to 300mA,
Slew Rate = 0.02A/uS
Slew Rate = 0.02A/uS
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LX8213
Channel 1 – 1.2V Output AC Coupled
Channel 4 – Output Current 1mA to 300mA,
Page 6
PRODUCTION DATASHEET
®
TM
LX8213
300mA Low Noise CMOS LDO Regulator
TYPICAL CHARACTERISTICS @ 25°C
LINE TRANSIENT RESPONSE
Channel 1 – 1.2V Output at 30mA, AC Coupled
Channel 1 – 3.3V Output at 30mA, AC Coupled
Channel 3 – VIN 2.5V to 3.5V
Channel 3 – VIN 3.75V to 5V
SOFT START WAVEFORM
SOFT START WAVEFORM
Channel 1 – 1.2V Output at No Load
Channel 1 – 3.3V Output at No Load
Channel 2 – SHDN 0V to 2V
Channel 2 – SHDN 0V to 2V
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LINE TRANSIENT RESPONSE
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LX8213
Copyright © 2009
Rev. 1.1, 2009-03-24
Page 7
LX8213
PRODUCTION DATASHEET
300mA Low Noise CMOS LDO Regulator
®
TM
TYPICAL CHARACTERISTICS @ 25°C
POWER SUPPLY REJECTION RATIO
815
795
PSR R (dB)
VR EF (m V)
805
785
775
765
VOUT=1.2V, VIN=2.5V
755
745
-45
-30
-15
0
15
30
45
60
75
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VREF VOLTAGE vs AMBIENT TEMPERATURE
100
90
80
70
60
50
40
30
20
10
0
90
10mA
300mA
CIN=0, VOUT=1.2V,
VIN=2.5V
0.1
Ambient Temperature (C)
1
10
100
Frequency (kHz)
LX8213
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
PRODUCTION DATASHEET
TM
LX8213
300mA Low Noise CMOS LDO Regulator
®
SIMPLIFIED BLOCK DIAGRAM
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Figure 1 – LX8213-00 (Adjustable Output) Simplified Block Diagram
APPLICATION SCHEMATIC
Copyright © 2009
Rev. 1.1, 2009-03-24
LX8213
Figure 2 – LX8213-12/33 Fixed Output Version Application
Schematic
Figure 3 – LX8213–00 Adjustable Output Application
Schematic
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
PRODUCTION DATASHEET
300mA Low Noise CMOS LDO Regulator
®
TM
LX8213
APPLICATION INFORMATION
Description
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.
Short Circuit Current Protection
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
To improve load transient response and noise rejection, an about 30˚C.
input bypass capacitor is recommended, but it is not required
Thermal Consideration
for stability. There are no requirements for the ESR
(Equivalent Series Resistor) on the input capacitor, but Thermal shutdown protects the integrated circuit from thermal
tolerance and temperature coefficient must be considered overload caused from a rise in junction temperature during power
when selecting the capacitor to ensure the capacitor will be dissipation. This means the protection is intended for fault
around 1µF over the entire operating temperature range. protection only and not as a means of current or power limiting
Capacitors with X5R or X7R characteristics are recommended. during normal application usage. Proper thermal evaluation
should be done to ensure that the junction temperature dose not
Output Capacitor
exceed it’s maximum rating. Operating at the maximum TJ of
For stability of the regulator, use a minimum 1uF capacitor to 150°C can impact reliability. Due to variation in individual device
bypass from VOUT to GND. Note that the LX8213 is stable electrical characteristics and thermal resistance, the built in
using low ESR ceramic capacitors. Capacitors with X5R or thermal overload protection may be activated at power levels
X7R characteristics generally perform well and are slightly above or below the rated dissipation.
recommended.
Power dissipation for regulator can be calculated using the
following equation:
Adjustable Output Voltage
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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
version with an output voltage range of 1.2V to 5.5V.
The
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.
Input Capacitor
The LX8213-00 output voltage can be set within the range of PD = (VIN(MAX)-VOUT(MIN)) * IOUT(MAX)
1.2V to 5.5V by connecting the FB pin to an external resistor
(Note: power dissipation resulting from quiescent current is
divider (See Figure 3). The output voltage can be calculated
negligible)
using:
For the SOT23 package, thermal resistance, θJA is 250°C/W
when mounted on a FR4 copper clad PCB. Junction temperature
⎡ R1 ⎤
VOUT = 0.8 1 +
of the integrated circuit can be calculated using:
⎢
⎥
⎣
R2 ⎦
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.
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 10
LX8213
TJ = TA + TRISE, substituting: TA + (PD * θJA).
R2 is chosen to minimize the power dissipated by the resistor An example: Given conditions: TA = 25°C, VIN= 2.5V, VOUT= 1.2V,
divider network while providing enough FB input bias current. IOUT= 200mA.
A value of 8.06kΩ is recommended.
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 ).
PRODUCTION DATASHEET
300mA Low Noise CMOS LDO Regulator
®
TM
LX8213
PACKAGE DIMENSION
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5 Pin Plastic SOT-23
SE
D
G
H
E
A1
A
C
B
F
J
I
Dim
A
A1
B
C
D
E
F
G
H
I
J
K
MILLIMETERS
MIN
MAX
0.90
1.30
0.90
1.45
0.25
0.50
0.09
0.20
2.80
3.10
1.50
1.75
0.95 BSC
1.90 BSC
2.60
3.00
0.35
0.55
0.00
0.15
10° MAX
INCHES
MIN
MAX
0.035
0.051
0.035
0.057
0.010
0.020
0.004
0.008
0.110
0.122
0.059
0.069
0.038 BSC
0.075 BSC
0.102
0.118
0.014
0.022
0.000
0.006
10° MAX
K
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.
LX8213
Copyright © 2009
Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 11