APL431

Features:

• Precise Reference Voltage to 2.500V
• Guaranteed 0.5%, 1% or 2% Reference Voltage Tolerance
• Sink Current Capability, 1mA to 100mA
• Quick Turn-on
• Adjustable Output Voltage, V_O = V_ref to 20V
• Low Operational Cathode Current, 250A Typical
• 0.1 Typical Output Impedance
• SOT-23, SOT-23-5, SOT-89, SO-8, TO-92 and TO-92S Packages




Application

• Linear Regulators
• Adjustable Power Supply
• Switching Power Supply




Specifications

Symbol	Parameter		Rating	Unit
VKA	Cathode voltage		20	V
IK	Continuous cathode current range		100	mA
IREF	Reference current range		3	mA
JA	Thermal Resistance from Junction to Ambient in Free Air			°C/W
		SOT-23	416
		SOT-23-5	257
		SOT-89	250
		TO-92	250
		SO-8	210
TA	Ambient temperature range	APL1431XXC	0 to 70	°C
		APL1431XXI	-40 to 85
Tj	Junction temperature range	APL1431XXC	0 to 150	°C
		APL1431XXI	-40 to 150
TSTG	Storage Temperature Range		-65 to 150	°C
TSOL	Lead temperature range, Ts (Soldering, 10sec) Original Device Lead Free Device		260 300	°C

Description

The APL431 is a 3-terminal adjustable voltage reference with specified thermal stability over applicable commercial temperature ranges. Output voltage may be set to any value between Vref (2.5 V) and 20 V with two external resistors (see Figure 2). When used with an photocoupler, the APL431 is an ideal voltage reference in isolated feedback circuits for 2.5V to 12V switching-mode power supplies. This device has a typical output impedance of 0.1. Active output circuitry provides a very sharp turn-on characteristic, making the APL431 excellent replacements for zener diodes in many applications, including on-board regulation and adjustable power supplies.