PDF LX432 Data sheet ( Hoja de datos )

Número de pieza	LX432
Descripción	LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
Fabricantes	Microsemi Corporation
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No Preview Available ! T H E I N F I N I T E P O W E R O F I N N O VAT I O N LX432 LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS PRODUCTION DATA SHEET DESCRIPTION The LX432 series are low-voltage pre- cision 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 im- pedance for improved load regula- tion — typical output impedance is 250mΩ. The LX432 series operates with an operating current as low as 80µA, making these devices suitable for por- table and micropower applications. Low voltage operation enables the LX432 to be used in the feedback loop of isolated low voltage power sup- plies. 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 10. The LX432 is offered in 3 and 5-pin 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 LinFinity's web site: http://www.linfinity.com. PRODUCT HIGHLIGHT TYPICAL PROGRAMMABLE VOLTAGE REFERENCE CIRCUIT VIN Cathode LX432 Anode Reference R1 R2 KEY FEATURES s Low Voltage Operation: 1.24V Reference s Initial Voltage Reference Accuracy 1% s Adjustable Output Voltage From V To 20V REF s Typical Output Dynamic Impedance Less Than 250mΩ s Sink Current Capability 80µA To 20mA s Direct Alternative To TLV431 A P P L I C AT I O N S s Low Voltage Adjustable Power Supplies s Instrumentation s Computers s Portable Equipment VKA GND Copyright © 1999 Rev. 1.0 9/99 TA (°C) 0 to 70 -40 to 85 PACKAGE ORDER INFORMATION SC Plastic 3-pin SOT-23 SE Plastic 5-pin SOT-23 LP Plastic 3-pin TO-92 LX432CSC LX432ISC LX432CSE LX432ISE LX432CLP LX432ILP Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX432CSET) TO-92 (LP) package also available in ammo-pack. LINFINITY MICROELECTRONICS INC. 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570 1 1 page PRODUCT DATABOOK 1996/1997 LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS PRODUCTION DATA SHEET LX432 CHARACTERISTIC CURVES 1.25 0.2 1.245 1.24 1.235 0.16 0.12 0.08 0.04 1.23 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 TJ : Junction Temperature ( C) FIGURE 1 — Reference Voltage vs. Junction Temperature 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 TJ : Junction Temperature ( C) FIGURE 2 — Reference Current vs. Junction Temperature 800 700 600 500 400 300 200 100 0 -100 -200 -1 -0.5 0 0.5 1 1.5 TJ : Junction Temperature (V) FIGURE 3 — Cathode Current vs. Cathode Voltage -1.200 -1.000 -0.800 -0.600 -0.400 -0.200 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 TJ : Junction Temperature ( C) FIGURE 4 — ∆VREF / ∆VKA vs. Junction Temperature Copyright © 1999 Rev. 1.0 9/99 5 5 Page

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Número de pieza	Descripción	Fabricantes
LX432	LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS	Microsemi Corporation
LX432CLP	LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS	Microsemi Corporation
LX432CSC	LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS	Microsemi Corporation
LX432CSE	LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS	Microsemi Corporation

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