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LX432ILP

P1-P3P4-P6P7-P9P10-P10
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 2000
Rev. 1.3, 2005-02-24
WWW.Microsemi .COM
LX432
Low Voltage Adjustable Precision Shunt
Regulator
P
RODUCTION
D
ATA
S
HEET
TM
®
DESCRIPTION
The LX432 series are low-voltage
precision adjustable shunt regulators with
a reference voltage of 1.24V. The output
voltage may be set to any value between
1.24V and 20V by two external resistors.
These devices offer low output
impedance for improved load regulation –
typical output impedance is 200mΩ. The
LX432 series operates with an operating
current as low as 80µA, making these
devices suitable for portable and
micropower applications.
Low voltage operation enables the
LX432 to be used in the feedback loop of
isolated low voltage power supplies. The
minimum output voltage is determined by
the LX432 output voltage plus the forward
voltage drop of the opto-coupler LED
(typically 1.24 + 1.4 = 2.64V minimum).
See figure 12.
The LX432 is offered in 3 lead SOT-23
or TO-92 packages, and is a drop-in
replacement for the TLV431 and SC431L
devices.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
Low Voltage Operation:
1.24V Reference
Initial Voltage Reference
Accuracy 1%
Adjustable Output Voltage
From VREF to 20V
Typical Output Dynamic
Impedance Less Than
250mΩ
Sink Current Capability
80µA To 20mA
Direct Alternative To
TLV431
APPLICATIONS
Low Voltage Adjustable
Power Supplies
Instrumentation
Computers
Portable Equipment
PRODUCT HIGHLIGHT
R2
R1
GND
V
KA
V
IN
LX432
Reference
Cathode
Anode
PACKAGE ORDER INFO
SC
Plastic SOT-23
3-Pin
LP
Plastic TO-92
3-Pin
T
A
(°C)
SC
Package
Marking
RoHS Compliant / Pb-free
Transition DC: 0503
RoHS Compliant / Pb-free
Transition DC: 0509
0 to 70 432C
LX432CSC LX432CLP
-40 to 85 432I
LX432ISC LX432ILP
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX432CSC-TR)
TO-92 (LP) package also available in ammo-pack.
L
L
X
X
4
4
3
3
2
2
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright © 2000
Rev. 1.3, 2005-02-24
WWW.Microsemi .COM
LX432
Low Voltage Adjustable Precision Shunt
Regulator
P
RODUCTION
D
ATA
S
HEET
TM
®
ABSOLUTE MAXIMUM RATINGS
(NOTE 1)
Cathode to Anode Voltage (V
KA
)..................................................................-0.3V to +20V
Reference Input Current (I
REF
).....................................................................-50µA to 10µA
Continuous Cathode Current (I
K
)...............................................................-25mA to 25mA
Operating Junction Temperature................................................................................150°C
Storage Temperature....................................................................................-65ºC to 150°C
RoHS / Pb-free Peak Package Solder Reflow Temperature
(40 second maximum exposure) ....................................................................260°C (+0,-5)
Note 1:
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.
THERMAL DATA
SC
3-Pin Plastic Package
(PC Mounted) 220°C/W
Thermal Resistance – Junction to Ambient, θ
JA
(Non-PC Mounted) 410°C/W
LP
3-Pin Plastic Package
Thermal Resistance – Junction to Ambient, θ
JA
156°C/W
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x θ
JA
).
The θ
JA
numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
PACKAGE PIN OUT
ANODE
REF
CATHODE
1
2
3
SC
P
ACKAGE
–
3-P
IN
3. C
ATHODE
2. A
NODE
1. R
EF
LP
P
ACKAGE
–
3-P
IN
RoHS / Pb-free 100% Matte Tin Lead Finish
(All Views Top View)
BLOCK DIAGRAM
+
-
V
REF
R
e
f
(
R
)
Anode(A)
Cathode (K)
Figure 1 – Simplified Block Diagram
P
P
A
A
C
C
K
K
A
A
G
G
E
E
D
D
A
A
T
T
A
A
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright © 2000
Rev. 1.3, 2005-02-24
WWW.Microsemi .COM
LX432
Low Voltage Adjustable Precision Shunt
Regulator
P
RODUCTION
D
ATA
S
HEET
TM
®
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX432C with 0°C
≤
T
A
≤
70°C and the LX432I with -40°C < T
A
< 85°C except where otherwise noted.
LX432
Parameter Symbol Test Conditions
Min Typ Max
Units
Reference Voltage V
REF
I
K
= 10mA, V
KA
= V
REF
, T
A
= 25°C 1.228 1.24 1.252 V
Reference Voltage Drift (note 2) ∆V
REF
I
K
= 10mA, V
KA
= V
REF
, 0°C < T
A
< 70°C 3 12 mV
I
K
= 10mA, V
KA
= V
REF
, -40°C < T
A
< 85°C 4 20 mV
Ratio of V
REF
Change In Cathode
Voltage Change (note 3)
KA
REF
∆V
∆V
I
K
= 10ma, V
KA
= V
REF
to 16V, T
A
= 25°C -1 -2.7 mV/V
Reference Terminal Current I
REF
I
K
= 10mA, V
KA
= V
REF
, T
A
=25°C, R1=10kΩ,
R2=Open
0.1 0.5 µA
I
K
= 10mA, V
KA
= V
REF
, 0°C < T
A
< 70°C 0.05 0.3 µA
Reference Current Drift (note 2) ∆I
REF
I
K
= 10mA, V
KA
= V
REF
, -40°C < T
A
< 85°C 0.1 0.4 µA
Minimum Cathode Current For
Regulation
I
K(MIN)
V
KA
= V
REF
, T
A
= 25°C 55 80 µA
Dynamic Impedance Z
KA
I
K
= 0.1mA to 15mA, V
KA
= V
REF
, T
A
= 25°C 0.2 0.4
Ω
Off-State Cathode Current I
OFF
V
KA
= 16V, T
A
= 25°C 0.004 µA
Note 2: These parameters are guaranteed by design.
Note 3:
KA
REF
∆V
∆V
Ratio of change in reference input voltage to the change in cathode voltage
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
P1-P3P4-P6P7-P9P10-P10

LX432ILP

Mfr. #:
Buy LX432ILP
Manufacturer:
Microchip / Microsemi
Description:
IC REG SHUNT PREC ADJ LV TO92
Lifecycle:
New from this manufacturer.
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