Issue 2 - June 2006 1 www.zetex.com
© Zetex Semiconductors plc 2006
ZTLV431
1.24V Cost effective shunt regulator
Description
The ZTLV431 is a three terminal adjustable shunt regulator offering
excellent temperature stability and output current handling capability up to
20mA. The output voltage may be set to any chosen voltage between 1.24
volts and 10 volts by selection of two external divider resistors.
The ZTLV431 can be used as a replacement for zener diodes in many
applications requiring an improvement in zener performance.
The ZTLV431 is available as standard as an A grade which has an initial
tolerance of 1%; a B grade is planned with an initial tolerance of 0.5%,
and all cover the -40°C to 125°C temperature range as standard.
Features
• Low voltage operation VREF = 1.24V
• Temperature range -40 to 125°C
• Reference voltage tolerance at 25°C
• 0.5% ZTLV431B
• 1% ZTLV431A
• Typical temperature drift
• 4 mV (0°C to 70°C)
• 6 mV (-40°C to 85°C)
• 11mV (-40°C to 125°C)
•100A minimum cathode current
•0.25⍀ typical output impedance
• Adjustable output voltage 1.24V to 10V
Applications
• Opto-coupler linearization
• Linear regulators
• Improved Zener
• Variable reference
Ordering information
Tol. Order code Package Part mark Status (*)
NOTES:
(*) For availability of preview status devices contact your local Zetex sales representative
Reel size Tape width
(mm)
Quantity
per reel
1%
ZTLV431AE5TA SOT23-5 S1A Preview 7” (180mm) 8 3,000
ZTLV431AFTA SOT23 S1A Active 7” (180mm) 8 3,000
ZTLV431AFFTA SOT23F S1A Preview 7” (180mm) 8 3,000
0.5%
ZTLV431BE5TA SOT23-5 S1B Preview 7” (180mm) 8 3,000
ZTLV431BFTA SOT23 S1B Preview 7” (180mm) 8 3,000
ZTLV431BFFTA SOT23F S1B Preview 7” (180mm) 8 3,000
1Ref
ZTLV431_F (SOT23)
(top view)
Pin connections
Cathode 2
3 Anode
1Ref
ZTLV431_FF (SOT23F)
(top view)
Cathode 2
3 Anode
Preview
ZTLV431_E5 (SOT23-5)
(top view)
N/C
N/C
Cathode
Anode
Ref
1
2
3
5
4
Preview