Microsemi LX8211A Schematic [ru]
LX8211A
TM
The LX8211A adjustable voltage
linear regulator combines low dropout,
high accuracy, very low ground current
and fast response in a very small
footprint.
Using the Enable pin the regulator is
switched on with TTL logic levels,
which is especially useful for batteryoperated equipment. Other features
include independent thermal and short
circuit current protection. The regulator
is stable with a low value ceramic output
capacitor.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
+
¯
C
IN
1µF
TJ (°C)
-40 to 125 Adjustable
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8211A-25ISE-TR)
DESCRIPTION
ultra low dropout typically less than
140mV at 100mA.
PRODUCT HIGHLIGHT
V
ON
OFF
3
ENABLE
LX8211A
UTPUT VOLTAGE
O
®
The PNP output transistor allows for
1
IN
V
OUT
Part
150mA Low Dropout Regulator
5
4
ADJUST
CBYP
GND
2
PACKAGE ORDER INFO
SE
RoHS Compliant / Pb-free
LX8211A-00ISE
470pF
Plastic SOT-23
5-PIN
KEY FEATURES
Dropout Voltage Typically
140mV @ 100mA
Ultra Low Shutdown Current
Typically Less Than 1µA
High Output Accuracy Trimmed
to 0.25%
Standard Pinout in SOT-23-5
Current and Over Temperature
Protection
Stable With Low Cost Ceramic
Output Capacitor
APPLICATIONS
Battery Operated Systems
Laptop, Notebook and PDA’s
Cellular Telephones / Pagers
Hand-Held Instruments
Linear post Regulators for
=
SMPS
V
ADJ
+
OUT
⎞
2R
+
⎟
1R
⎠
⎛
1V
⎜
⎝
C
OUT
R1
10µF
R2
CBYP Optional for low noise
PACKAGE MARKING
E2C
⎛
⎜
⎝
I
ADJ
WWW.Microsemi .COM
⎞
2R
⎟
⎠
L
L
X
X
8
8
2
2
1
1
1
1
A
A
Copyright © 2006
Rev. 1.0, 2006-04-07
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LX8211A
TM
Input Voltage (VIN) ......................................................................................-0.3V to +15V
Enable Input ........................................................................................-0.3V to V
Output Current (I
Maximum Junction Temperature (TJ) .......................................................................150°C
Peak Package Solder Reflow Temperature (40 second max. exposure)....... 260°C (+0, -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into negative out of specified terminal.
ABSOLUTE MAXIMUM RATINGS
)............................................................................................. 150mA
OUT
®
150mA Low Dropout Regulator
PACKAGE PIN OUT
+ 0.3V
IN
1
2
3
RoHS / Pb-free 100% Matte Tin Lead Finish
SE PACKAGE
(Top View)
WWW.Microsemi .COM
5
4
SE
Thermal Resistance – Junction to Ambient, θJA
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θ
system. All of the above assume no ambient airflow.
PIN NAME
VIN 1 Unregulated Input Supply Voltage
GND 2 Ground Pin
ENABLE 3 Enable Control Input, Enable High
ADJUST 4 Adjust Control Input for Resistor Divider Network.
VOUT 5 Regulated Output Voltage. Regulator stability is achieved with an external capacitor of 10µF.
5-PIN SOT-23 PACKAGE
Two – Layer Board
Four – Layer Board
numbers are guidelines for the thermal performance of the device/pc-board
JA
PIN
NUMBER
THERMAL DATA
FUNCTIONAL PIN DESCRIPTION
220°C/W
220°C/W
D
ESCRIPTION
Copyright © 2006
Rev. 1.0, 2006-04-07
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
P
P
A
A
C
C
K
K
A
A
G
G
E
E
D
D
A
A
T
T
A
A
LX8211A
TM
RECOMMENDED OPERATING CONDITIONS
®
Parameter Symbol
Input Operating Voltage Range (Note 1)
Minimum Output Voltage
Enable Input Voltage Range
Continuous Output Current Range I
Operating Temperature Range TJ -40 125 °C
Input Capacitor (VIN to GND) CIN 1.0 1.0* µF
Output Capacitor (V
Note 1: The minimum VIN has to meet two conditions V
* Size your output capacitor to meet the transient loading requirement. If you have a very dynamic load, a lower ESR and larger value capacitor will
improve the response to these load steps.
to GND) C
OUT
> 3.0V and V
IN
> V
IN
OUT
150mA Low Dropout Regulator
LX8211A
Min Typ Max
3.0 13.0 V
V
IN
2.3 V
ENABLE 0 VIN
0.1
150
+ V
OUT
10 µF
OUT
.
DROPOUT
Units
mA
Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C ≤ T
noted. Test conditions: V
methods.
Parameter Symbol Test Conditions
IN
= V
OUT
ELECTRICAL CHARACTERISTICS
+1V, V
= 2.9V; I
OUT
= 10mA; CIN = 1µF; C
OUT
OUT
≤ 125°C except where
J
= 10µF; TJ = TA, using low duty cycle pulse testing
LX8211A
Min Typ Max
Units
WWW.Microsemi .COM
Adjust Reference Voltage V
ΔV
Line Regulation
Load Regulation
Dropout Voltage
(Note2)
Ground Pin Current I
Adjust Input Bias Current I
Enable Pin Current IEN VEN = VIN 25 µA
Enable Threshold
Short Circuit Current Limit IOUTSC V
Power Supply Rejection Ratio PSRR TJ = 25°C, f = 120Hz 75 dB
Output Noise eN TJ = 25°C, C
Thermal Shutdown Temperature TSD 170 °C
Note 2: Dropout voltage is defined as the input to output differential at which the output voltage drops 1% below the nominal value.
Note 3: Limits require operation within recommended operating conditions.
⎛
⎜
⎝
ΔV
⎛
⎜
⎝
()
O
ΔV
O
IN
ΔI
O
VV −
OIN
⎞
⎟
⎠
⎞
⎟
⎠
Note 3 1.225 1.25 1.275 V
ADJ
VIN = V
V
RV
TJ = 25°C, I
V
RI
I
OUT
I
LOAD
I
V
LOAD
DO
I
LOAD
I
LOAD
Enable = Hi, I
Enable = Hi, I
GND
Enable = Low (Standby) 5 µA
Current Flows Out of Pin 4 50 500 nA
ADJ
VIH 2.0 V
0.18 V
V
IL
OUT
+ 1.0 TO 13 Volts, I
OUT
: 0.5 TO 150mA 0.05 0.2 %V
OUT
: 0.5 TO 150mA 0.5 %V
= 10mA, ΔVO = -1%
= 50mA, ΔVO = -1%
= 100mA, ΔVO = -1%
= 150mA, ΔVO = -1%
= 100mA 600 1500 µA
OUT
= 150mA 1300 2500 µA
OUT
= 0V 400 mA
= 10µF 260 nv /√Hz
OUT
=0.1mA 0.04 0.1 %/V
OUT
0.1 V
0.12 0.23 V
0.175 0.3 V
0.25 0.35 V
NOM
NOM
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
Copyright © 2006
Rev. 1.0, 2006-04-07
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
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