My Inquiry
My Account
STMicroelectronics TS432ILT
- Part No.:
- TS432ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TS432ILT.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,172
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TS432ILT from STMicroelectronics is an adjustable precision shunt voltage reference delivering 1.24 V nominal output (±1% initial tolerance), ultra-low 60 µA max operating current at 25°C, and 100 ppm/°C temperature coefficient across –40°C to +85°C. It operates as a two-terminal programmable reference in feedback loops of SMPS, battery chargers, and instrumentation circuits.
For engineers reviewing the TS432ILT datasheet, TS432ILT pinout, TS432ILT application, or TS432ILT equivalent, key selection criteria include its SOT23-3 package footprint, cathode/anode/reference terminal configuration, low-current stability under capacitive loads, and ±1% initial accuracy with guaranteed thermal drift performance.
Technical Context
The TS432ILT functions as a three-terminal shunt reference where the reference voltage is set externally via resistor dividers between cathode and anode, enabling output adjustment from 1.24 V to 10 V. Its internal bandgap core ensures stable operation with load currents from 60 µA to 12 mA.
It maintains <2 mV/V output voltage sensitivity over 1.24–10 V cathode voltage range and exhibits <16 mV total reference voltage variation across the full industrial temperature range, verified by production testing at 25°C and correlation over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.24 V nominal, adjustable to 10 V via external resistors - sets precise feedback threshold in regulator control loops |
| Initial Accuracy | ±1% at 25°C - enables single-resistor calibration in cost-sensitive power management designs |
| Temp Coefficient | 100 ppm/°C - ensures ≤1.6 mV drift over –40°C to +85°C ambient for stable reference in unregulated environments |
| Operating Current | 60 µA max at 25°C - supports ultra-low-power battery-operated systems without sacrificing regulation fidelity |
| Static Impedance | 0.25–0.5 Ω - minimizes output voltage perturbation during dynamic load transients in closed-loop systems |
| Long-Term Stability | 120 ppm after 1000 hrs - reduces calibration drift in field-deployed instrumentation and telecom infrastructure |
Pinout & Package
TS432ILT is housed in a standard SOT23-3 plastic micropackage (JEDEC MO-178AA), optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Reference ground return path | Serves as common reference node; must be connected directly to system ground for accurate voltage setting |
| Cathode (K) | Adjustable output terminal | Connects to feedback divider top node; voltage here defines regulated output point in SMPS or charger IC |
| Ref (R) | Internal reference tap | Provides access to internal 1.24 V bandgap node; used with external resistors to program output voltage |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive-load stability | Maintains regulation with ≥1 µF ceramic output capacitance - eliminates need for series damping resistors in compact power supplies |
| Low-noise operation | 200 nV/√Hz wideband noise (100 Hz–10 kHz) - preserves signal integrity in precision ADC references and sensor front-ends |
| Wide cathode voltage range | Operates with VK = 1.24–10 V - supports direct interface with 3.3 V, 5 V, and 12 V rail systems without level-shifting |
| Off-state leakage | ≤100 nA at VREF = 0 V, VK = 10 V - prevents parasitic discharge in battery backup and always-on monitoring circuits |
Applications
| Battery Charger Feedback | SMPS Voltage Regulation |
|---|---|
Use Scenario: Precision voltage sensing in linear and switch-mode battery charging ICs for Li-ion and NiMH cells. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.24 V reference for current-sense amplifier feedback and charge termination thresholds. Use Value: Enables ±1% charge voltage accuracy across temperature, improving cell longevity and safety compliance. | Use Scenario: Output voltage setting in isolated DC-DC converters and non-isolated buck regulators. IC Role / Device Role / Timing Role: Adjustable reference node in optocoupler feedback loop or TL431-replacement topology. Use Value: Supports 1.24–10 V output programming with <2 mV/V line regulation, reducing BOM count vs fixed-reference solutions. |
| Portable Instrumentation | Industrial Sensor Signal Conditioning |
Use Scenario: Reference source for 12-bit+ SAR ADCs in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference for ADC reference input and DAC biasing. Use Value: Delivers 120 ppm long-term stability and 200 nV/√Hz noise, preserving effective resolution over time and temperature. | Use Scenario: Excitation and scaling reference for bridge-based pressure/strain sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Stable excitation voltage source and gain-setting reference for instrumentation amplifiers. Use Value: 100 ppm/°C TC and <16 mV total drift ensure consistent sensor output scaling across industrial ambient ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Fixed 2.495 V output; 100 µA typical operating current; ±1% initial tolerance | Requires external resistor network to scale down to 1.24 V; higher quiescent current limits ultra-low-power use | Select when 2.5 V reference suffices and board space allows larger SOT23-6 footprint |
| MAX6008AEUR+T | Fixed 1.25 V output; 35 µA max operating current; ±0.5% initial tolerance | No adjustability; lower drift (50 ppm/°C) but limited to 1.25 V - incompatible with >1.25 V programmable designs | Choose for lowest-power 1.25 V reference where output adjustability is unnecessary |
Compared with TL431ACDBVR and MAX6008AEUR+T, TS432ILT uniquely combines 1.24 V adjustability, 60 µA max current, and SOT23-3 footprint - making it optimal for space- and power-constrained designs requiring programmable reference voltages from 1.24 V to 10 V.
Availability
TS432ILT is available at Aetrix Electronics and suitable for battery chargers, switch-mode power supplies, portable instrumentation, and industrial sensor interfaces requiring stable component supply and long-lifecycle support.
Supply support for TS432ILT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, power devices, and MEMS sensors for industrial, automotive, and consumer markets.
The TS432 series belongs to ST's precision analog reference product line, engineered specifically for high-accuracy, low-power voltage regulation in space-constrained power management and measurement systems.
FAQ
What is the minimum cathode current required for TS432ILT to regulate accurately?
The TS432ILT requires a minimum cathode current of 60 µA at 25°C and 65 µA across –40°C to +85°C to maintain specified reference voltage accuracy. Below this threshold, regulation degrades and output voltage deviates beyond ±1% tolerance. External resistor values must ensure this current is sustained under all operating conditions.
Can TS432ILT replace TL431 in existing designs without circuit modification?
No - TS432ILT uses a three-terminal (Anode/Cathode/Ref) configuration versus TL431's three-terminal (Anode/Cathode/Ref) but different internal topology and pinout. Direct replacement requires verifying pin mapping (SOT23-3 vs SO-8/SOT23-6), adjusting feedback resistor values for 1.24 V base, and confirming cathode current compliance within 60 µA–12 mA range.
Does TS432ILT require an external capacitor for stability?
No external capacitor is required for basic regulation stability. The TS432ILT is designed to remain stable with capacitive loads up to at least 1 µF, as confirmed in the datasheet. However, adding a 100 nF ceramic capacitor from cathode to anode improves transient response in high-dynamic-load applications like fast-switching SMPS feedback paths.
How does the 100 ppm/°C temperature coefficient translate to actual voltage drift?
With a 100 ppm/°C coefficient and 1.24 V nominal output, TS432ILT drifts approximately 0.124 mV per °C. Over the full –40°C to +85°C range (125°C span), maximum drift is 15.5 mV - well within the datasheet-specified 16 mV total variation limit, ensuring predictable performance in industrial environments.
TS432ILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 10 V
- Current - Output:
- 12 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TS432ILT FAQ
1.How can I place an order for TS432ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS432ILT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TS432ILT reliable?
The price and inventory of TS432ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS432ILT is usually 5 days.
3.What payment methods are accepted for TS432ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS432ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS432ILT?
TS432ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS432ILT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TS432ILT?
For technical support, including TS432ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS432ILT requirements.
6.How does Aetrix verify that TS432ILT is sourced from the original manufacturer or authorized distributors?
All TS432ILT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS432ILT meets industry standards.
7.What is the process for return or replacement of TS432ILT?
All TS432ILT units undergo pre-shipment inspection (PSI). If there is an issue with TS432ILT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TS432ILT part is unused and in its original packaging.
Return procedure for TS432ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS432ILT Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
