APL1431

Features:

• Precise Reference Voltage to 2.500V
• Guaranteed 0.5% or 1% 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-89 and TO-92 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		120	mA
IREF	Reference current range		3	mA
JA	Thermal Resistance from Junction to Ambient in Free Air			°C/W
		SOT-23	416
		SOT-89	250
		TO-92	250
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)		260	°C

Description

The APL1431 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 APL1431 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 APL1431 excellent replacements for zener diodes in many applications, including on-board regulation and adjustable power supplies.