Standard linear products for voltage
regulation in various applications
Adjustable precision shunt regulators
Key features of TL431 series
`Reference voltage of 2.495 V
`Programmable output voltage up to 36 V
`Three different reference voltage tolerances
`Low typical output impedance of 0.2 Ω
`High sink current capability of 100 mA
`AEC-Q100 qualied (grade 1)
`Small plastic surface-mounted package SOT23
Key features of TLVH431 series
`Low reference voltage of only 1.24 V
`Programmable output voltage down to 1.24 V
`Three different reference voltage tolerances
`Low typical output impedance of 0.2 Ω
`Low minimum cathode current of 80 µA
`AEC-Q100 qualied (grade 1)
`Small plastic surface-mounted package SOT23
NXP, your one-stop-shop for high-quality products, supplies an attractive portfolio of standard
linear devices, including precision shunt regulators with two different reference voltage levels, and
linear voltage regulators with adjustable or xed output voltages.
Linear voltage regulators
Key features of NX1117 series
` Adjustable version with Vref = 1.25 V
` 9 xed output voltage versions
` Wide input voltage range up to 20 V
` High maximum output current of 1 A
` 2 output voltage accuracy selections with 1% or 1.25%
` Wide temperature range from -40 to 125 °C
` Output current limiting
` Thermal shutdown
` Safe operation area control
` Medium power plastic package SOT223
NXP shunt voltage
regulators TL431 & TLVH431
and linear voltage regulator
NX1117 portfolio
SOT23
2.9 x 1.3 x 1.0 mm
SOT223 (SC-73)
6.5 x 3.5 x 1.65 mm
Key applications
`Post regulation for SMPS
`Consumer and industrial equipment point of load
`Battery charger
`Hard drive controllers
`Core voltage supply: FPGA, PLD, DSP, CPU
`LCD TV
`Set top box
`DVD player
Key benets
`Wide operation range to 20 V input
`High maximum output current of 1 A
`Excellent load regulation
`Output current limiting
`Thermal shutdown
`Safe operation area control
`Full temperature range from -40 to 125 °C
`Any output voltage in the given range can be set by just two
external resistors for the adjustable version
`No minimum load required for xed output voltage versions
Low-dropout adjustable and xed linear voltage regulator NX1117
Package
SOT223 (SC-73)
Size (mm) 6.5 x 3.5 x 1.65
Ptot (mW) 1700
Vmax (V) Imax (A) Vout drop (V)
@ 800 mA Vout (V)
Vout tolerance
1% 1.25%
20 1 1.1
1.25 adjustable NX1117CADJZ NX1117CEADJZ
1.2 NX1117C12Z NX1117CE12Z
1.5 NX1117C15Z NX1117CE15Z
1.8 NX1117C18Z NX1117CE18Z
1.9 NX1117C19Z NX1117CE19Z
2.0 NX1117C20Z NX1117CE20Z
2.5 NX1117C25Z NX1117CE25Z
2.85 NX1117C285Z NX1117CE285Z
3.3 NX1117C33Z NX1117CE33Z
5.0 NX1117C50Z NX1117CE50Z
NX1117C33Z and NX1117CE33Z: Typical application for
xed output voltage versions
NX1117CADJZ and NX1117CEADJZ: Typical application for
adjustable output voltage versions
VOUT = Vref x (1+R2/R1) + Iadj x R2
Types in bold represent new products
Key applications
`Shunt voltage regulator
`Precision current limiter
`Precision constant current sink
`Isolated feedback loop for Switch Mode Power
Supply (SMPS)
Key benets
`Simple solution to achive a stabilized voltage
`Any output voltage from 2.5 to 36 V can be set by
just two external resistors
`Full temperature range from -40 to 125 °C
`Low temperature drift: typically 6 mV (between 0 and 70 °C)
`Low output noise
`High quality level according AEC-Q100
Any voltage in the given range can be set by
only 2 external resistors
Package
SOT23
Size (mm) 2.9 x 1.3 x 1.0
Ptot (mW) 580
Pinning configuration Normal pinning*Mirrored pinning*
VKA (V) IK (mA) Vref Tamb (°C)
36 100 2.495
2%
0 to 70 TL431CDBZR 1)
-40 to 85 TL431IDBZR 1)
-40 to 125
TL431QDBZR 1)
TL431FDT 2) TL431MFDT 2)
TL431SDT 3) TL431MSDT 3)
1%
0 to 70 TL431ACDBZR 1)
-40 to 85 TL431AIDBZR 1)
-40 to 125
TL431AQDBZR 1)
TL431AFDT 2) TL431AMFDT 2)
TL431ASDT 3) TL431AMSDT 3)
0.5%
0 to 70 TL431BCDBZR 1)
-40 to 85 TL431BIDBZR 1)
-40 to 125
TL431BQDBZR 1)
TL431BFDT 2) TL431BMFDT 2)
TL431BSDT 3) TL431BMSDT 3)
types in bold represent new products
Adjustable shunt voltage regulator TL431 with Vref = 2.495 V
1) Offers enhanced stability area and very low load capacity requirement
2) Offers higher ElectroMagnetic Interference (EMI) ruggedness, e.g. for Switch Mode Power Supply
3) Is designed for standard requirements and linear applications
* Normal pinning vs. mirrored pinning for TL431
Pin Symbol Description Simplified outline Grafic symbol
Normal pinning
1 k cathode
2 REF reference
3 a anode
Mirrored pinning
1 REF reference
2 k cathode
3 a anode
001aaa152
2
1
3
Top view
1 2
3
001aaa152
2
1
3
Top view
1 2
3
006aab355
REF
a k
006aab355
REF
a k
Functional diagram Shunt voltage regulator
www.nxp.com
© 2011 NXP Semiconductors N.V.
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The
information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and
may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof
does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Date of release: September 2011
Document order number: 9397 750 17148
Printed in the Netherlands
Key applications
`Shunt voltage regulator
`Precision current limiter
`Precision constant current sink
`Isolated feedback loop for Switch Mode Power Supply (SMPS)
Key benets
`Enabling regulated voltage down to 1.24 V
`Any higher output voltage up to 18 V can be set by just two external
resistors
`Supports feedback loop application for 3.3 V SMPS
`Lowest Ik(min) value of 55 µA (typical) for improved energy efciency
`Full temperature range from -40 to 125 °C
`Very low temperature drift: typically 4 mV (between -40 and 125 °C)
`Low output noise
`High quality level according AEC-Q100
Package
SOT23
Size (mm) 2.9 x 1.3 x 1.0
Ptot (mW) 580
Pinning configuration Normal pinning*Mirrored pinning*
VKA (V) IK (mA) Vref Tamb (°C)
20 80 1.24
1.5%
0 to 70 TLVH431CDBZR
-40 to 85 TLVH431IDBZR
-40 to 125 TLVH431QDBZR TLVH431MQDBZR
1%
0 to 70 TLVH431ACDBZR
-40 to 85 TLVH431AIDBZR
-40 to 125 TLVH431AQDBZR TLVH431AMQDBZR
0.75% -40 to 125 TLVH431DQDBZR TLVH431DMQDBZR
Adjustable shunt voltage regulator TLVH431 with Vref = 1.24 V
* Normal pinning vs. mirrored pinning for TLVH431
Pin Symbol Description Simplified outline Grafic symbol
Normal pinning
1 REF reference
2 k cathode
3 a anode
Mirrored pinning
1 k cathode
2 REF reference
3 a anode
001aaa152
2
1
3
Top view
1 2
3
001aaa152
2
1
3
Top view
1 2
3
006aab355
REF
a k
006aab355
REF
a k
Isolated feedback loop for Switch Mode
Power Supply (SMPS)
types in bold represent new products