lm432dn3 Cystech Electonics Corp., lm432dn3 Datasheet

no-image

lm432dn3

Manufacturer Part Number
lm432dn3
Description
Adjustable Shunt Regulator
Manufacturer
Cystech Electonics Corp.
Datasheet
Adjustable shunt regulator
LM432XA3/N3
Description
The LM432 is a three terminal adjustable shunt
regulator with thermal stability guaranteed over
temperature. The output voltage can be adjusted
to any value from 1.24V(V
external resistors. The LM432 has a typical dynamic
output impedance of 0.05Ω. Active output circuitry
provides a very sharp turn on characteristic, making
the LM432 an excellent replacement for zener diodes.
The LM432 shunt regulator is available with four
voltage tolerances(0.25%,0.5%,1% and 2%), and two
package options(TO-92 and SOT-23). This allows the
designer the opportunity to select the optimum combi-
nation of cost and performance for their application.
Typical Application Circuit
LM432XA3/N3
VIN
GND
R
VREF
REF
CYStech Electronics Corp.
) to 20V with two
R1
R2
(Note 1,2)
PL432
LM432
VOUT
Features
◆Wide operating current range 80μA to 100mA
◆Trimmed bandgap design ±0.25%
◆Low voltage operation(down to 1.24V)
◆Low dynamic output impedance 0.05Ω typ.
◆Available in TO-92 and SOT-23 packages
◆Upgrade for LM431
◆Linear Regulators
Applications
◆Adjustable Supplies
◆Switching Power Supplies
◆Battery Operated Computers
◆Computer Disk Drives
◆Instrumentation
Notes:
1) Set V
2) Choose the value for R as follows:
˙The minimum limit for R should be as such that Iz
˙The maximum limit for R should be such that the
V
OUT
cathode current, Iz, is greater than the minimum
operating current(80μA) at VI
does not exceed 100mA under all load conditions,
and the instantaneous turn-on value for Iz does not
exceed 150mA. Both of the following conditions
must be met:
turn-on Iz)
Rmin≥V
Rmin≥ V
=V
OUT
REF
according to the following equation:
I
(1+R1/R2)+I
IN(max)
OUT(min)
IN(max)
/150mA(to limit instantaneous
-V
+100mA
OUT
REF
CYStek Product Specification
Spec. No. : C504N3
Issued Date : 2003.03.21
Revised Date : 2005.10.07
Page No. : 1/9
R1
(to limit Iz under
normal operating
conditions)
N(MIN)
.

Related parts for lm432dn3

lm432dn3 Summary of contents

Page 1

Adjustable shunt regulator LM432XA3/N3 Description The LM432 is a three terminal adjustable shunt regulator with thermal stability guaranteed over temperature. The output voltage can be adjusted to any value from 1.24V(V REF external resistors. The LM432 has a typical dynamic ...

Page 2

Absolute Maximum Ratings Parameter Cathode Voltage Continuous Cathode Current Reference Input Current Power Dissipation at T =25℃ A SOT-23 TO-92 Thermal Resistance SOT-23 TO-92 Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Lead Temperature(Soldering) 10 seconds ESD ...

Page 3

Unless otherwise specified, TA=25℃. Values in bold apply over full operating ambient temperature range. Parameter Symbol Reference Voltage V V REF Z V Temperature V V REF DEV Z Deviation Ratio of Change in I =10mA, ΔV ΔV REF Z ...

Page 4

... SOT-23(Top View) 2 Anode 3 1 Block Diagram Cathode REF VREF Anode Ordering Information Package 0.25% TO-92 LM432DA3 SOT-23 LM432DN3 Characteristic Curves LM432XA3/N3 CYStech Electronics Corp. Cathode Reference Tolerance 0.5% LM432CA3 LM432BA3 LM432CN3 LM432BN3 Spec. No. : C504N3 Issued Date : 2003.03.21 Revised Date : 2005.10.07 Page No. : 4/9 TO-92(Top View) ...

Page 5

CYStech Electronics Corp. Cathode Current vs Cathode Voltage 300 Vz=V REF 200 TA=25℃ 100 0 -100 -200 -300 -1 -0.5 0 Cathode Voltage---Vz(V) Reference Voltage vs Junction Temperature 1.248 1.246 1.244 1.242 1.24 1.238 1.236 1.234 - Junction ...

Page 6

CYStech Electronics Corp. Reference Impedance vs Junction Temperature 0.5 Iz=0.1 to 100mA 0.45 Vz=V REF 0.4 f<1kHz 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 -50 - Junction Temperature---TJ(℃) Small-Signal Gain vs Frequency ...

Page 7

CYStech Electronics Corp. Iz 10£gF 15k PL432 LM432 8.25k Applications Information - Stability Selection of load capacitance when using LM432 as a shunt regulator When the LM432 is used as a shunt regulator, two options for selection of C are ...

Page 8

TO-92 Dimension Inches DIM Min. Max. A 0.1704 0.1902 B 0.1704 0.1902 C 0.5000 - D 0.0142 0.0220 E - 0.0500 * F 0.1323 0.1480 Notes: 1.Controlling dimension: millimeters. ...

Page 9

SOT-23 Dimension Inches DIM Min. Max. A 0.1102 0.1204 B 0.0472 0.0630 C 0.0335 0.0512 D 0.0118 0.0197 G 0.0669 0.0910 H 0.0005 0.0040 Notes: 1.Controlling dimension: millimeters. 2.Maximum lead thickness ...

Related keywords