My Inquiry
My Account
Texas Instruments SM72238TDE-3.3/NOPB
- Part No.:
- SM72238TDE-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
SM72238TDE-3.3/NOPB.pdf
- Description:
- IC REG LINEAR 3.3V 100MA TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,941
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM72238TDE-3.3/NOPB from Texas Instruments is a micropower low-dropout (LDO) voltage regulator delivering a precise 3.3V output with ±0.6% initial tolerance, 75µA typical quiescent current, and 380mV dropout at 100mA load. It operates across −40°C to +125°C and supports stable regulation down to zero load - ideal for battery-powered renewable energy monitoring systems and CMOS RAM keep-alive circuits.
For engineers reviewing the SM72238TDE-3.3/NOPB datasheet, SM72238TDE-3.3/NOPB pinout, SM72238TDE-3.3/NOPB application, or SM72238TDE-3.3/NOPB equivalent, key selection criteria include its ultra-low IQ in dropout, tight line/load regulation (0.04%/0.1%), compatibility with low-ESR capacitors (1–6Ω), thermal/current limiting, and TO-252 (DPak) package suitability for high-reliability industrial power rails.
Technical Context
The SM72238TDE-3.3/NOPB uses a PMOS pass transistor architecture enabling near-zero dropout rise with load and minimal quiescent current increase in dropout - critical for extending battery life in intermittent-load applications. Its internal compensation relies on output capacitor ESR (1–6Ω) to maintain phase margin, eliminating need for external compensation components.
It integrates overcurrent protection (160mA typ.) and thermal shutdown, with guaranteed 100mA output current across full temperature range. The device functions both as a regulator and a precision voltage reference due to its 50ppm/°C temperature coefficient and 0.05% thermal regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±0.6% at 25°C; ±1.0% over −40°C to +125°C - ensures stable logic supply for microcontrollers and sensors. |
| Quiescent Current | 75µA typ. at 100µA load; rises only to 110µA in dropout - preserves battery capacity in always-on IoT nodes. |
| Dropout Voltage | 380mV max at 100mA - enables operation from single-cell LiFePO₄ (3.6V min) or two alkaline cells (3.0V). |
| Line Regulation | 0.04% typ. (0.2% max) - maintains output stability despite input ripple or battery sag. |
| Load Regulation | 0.1% typ. (0.2% max) - delivers consistent voltage across 100µA–100mA load range, including sleep-to-active transitions. |
| Output Capacitor ESR | 1Ω to 6Ω required - mandates use of tantalum or aluminum electrolytic (not bare ceramic) unless series resistor added. |
| Thermal Coefficient | 50ppm/°C - supports reference-grade accuracy in temperature-varying environments like solar inverters. |
Pinout & Package
SM72238TDE-3.3/NOPB is housed in a TO-252 (DPak, package drawing NDP0003B) surface-mount package with exposed thermal pad for enhanced heat dissipation. The 3-pin configuration supports compact layout and efficient PCB thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Input) | VIN | Regulator input; accepts 4.3V to 30V DC - must be bypassed with ≥1µF capacitor if >10" from source. |
| 2 (Ground) | GND | Power ground reference; connects to exposed thermal pad - requires solid copper pour for thermal performance. |
| 3 (Output) | VOUT | Stable 3.3V output; requires 1µF minimum output capacitor (ESR 1–6Ω) for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 75µA IQ enables >10-year battery life in 10µA average-load sensor nodes. |
| Zero-Load Stability | Remains in regulation with no load - eliminates need for dummy loads in RAM backup circuits. |
| Reference-Grade Accuracy | 0.5% initial tolerance + 50ppm/°C TC allows direct use as 3.3V reference without trimming. |
| Robust Protection | Integrated thermal shutdown and 160mA current limit prevent damage during fault conditions. |
| Low-ESR Flexibility | Stable with 1–6Ω output capacitor ESR - supports cost-effective tantalum or polymer caps instead of expensive ceramics. |
Applications
| Solar Charge Controller Monitoring | Wireless Sensor Node Power |
|---|---|
|
Use Scenario: Powering MCU, ADC, and RF transceiver in off-grid solar charge controllers operating from variable PV input. IC Role / Device Role / Timing Role: Primary 3.3V LDO regulator supplying digital core and analog sensing circuitry. Use Value: Ultra-low 75µA quiescent current extends nighttime battery runtime; 380mV dropout enables operation down to 3.68V input - matching LiFePO₄ discharge curve. |
Use Scenario: Long-life battery-powered environmental sensor transmitting data every 15 minutes via BLE or LoRa. IC Role / Device Role / Timing Role: System power regulator delivering clean 3.3V to MCU and sensor during active bursts and deep-sleep states. Use Value: Zero-load stability eliminates leakage path; tight 0.1% load regulation prevents brownout during RF transmit peaks. |
| Industrial RTU Backup Supply | CMOS RAM Keep-Alive Circuit |
|
Use Scenario: Providing fail-safe 3.3V rail to remote terminal unit (RTU) memory and real-time clock during main power loss. IC Role / Device Role / Timing Role: Standby voltage regulator maintaining volatile memory state using supercapacitor or coin cell. Use Value: Guaranteed 100mA output supports simultaneous RTC + SRAM + nonvolatile register retention; −40°C to +125°C rating suits harsh cabinet environments. |
Use Scenario: Preserving contents of static RAM during AC power interruption in embedded instrumentation. IC Role / Device Role / Timing Role: Low-power voltage source directly replacing Zener-based keep-alive solutions. Use Value: 0.5% initial tolerance and 50ppm/°C TC ensure <±10mV drift over temperature - preventing RAM corruption without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS820B0LDV50 | 5.0V fixed output; 30µA IQ; 200mV dropout at 150mA; AEC-Q100 qualified | Automotive body electronics; requires higher VIN headroom (min 5.2V) | Select when automotive qualification and lower IQ outweigh need for 3.3V output. |
| TPS7A2033PDQNR | 3.3V output; 25µA IQ; 175mV dropout at 300mA; 0.7µF ceramic-cap stable | Space-constrained consumer wearables; no ESR requirement | Choose for ultra-low IQ and ceramic capacitor simplicity - but verify thermal derating at 100mA in TO-252 footprint. |
Compared with TLS820B0LDV50 and TPS7A2033PDQNR, the SM72238TDE-3.3/NOPB offers superior thermal coefficient (50ppm/°C vs. 100ppm/°C) and zero-load stability - making it uniquely suitable for reference-critical and ultra-low-power industrial backup rails where ceramic cap compatibility is secondary to long-term voltage integrity.
Availability
SM72238TDE-3.3/NOPB is available at Aetrix Electronics and suitable for renewable energy monitoring systems, wireless sensor networks, and industrial RTU backup supplies requiring stable component supply, extended temperature operation, and micropower efficiency.
Supply support for SM72238TDE-3.3/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-reliability power regulation.
The SM72238 series was designed specifically for micropower, high-accuracy regulation in battery- and energy-harvesting systems - emphasizing ultra-low IQ, tight tolerance, and robustness across wide temperature and load ranges.
FAQ
What is the maximum input voltage for SM72238TDE-3.3/NOPB?
The SM72238TDE-3.3/NOPB supports a maximum input voltage of 30V under normal operating conditions. Absolute maximum rating is also 30V, with transient survival up to −0.3V to +30V. Exceeding this risks permanent damage. For reliable operation in solar or industrial applications, design with ≥1V headroom above 3.3V output - e.g., 4.3V minimum input for dropout margin.
Can SM72238TDE-3.3/NOPB operate without an output capacitor?
No - SM72238TDE-3.3/NOPB requires a minimum 1.0µF output capacitor with ESR between 1Ω and 6Ω for stability. Omitting it causes oscillation. Unlike many regulators, it remains stable at zero load, but capacitor dependency is absolute. Ceramic caps below 1000pF may be used; larger ceramics require a 0.1–2Ω series resistor to restore phase margin.
Is SM72238TDE-3.3/NOPB suitable for use as a voltage reference?
Yes - SM72238TDE-3.3/NOPB is explicitly characterized for reference use: it features 0.5% initial tolerance, 50ppm/°C temperature coefficient, and 0.05% thermal regulation. Its low noise (100µV rms with 3.3µF bypass) and tight line/load regulation make it viable as a 3.3V reference in precision ADC biasing or calibration circuits - eliminating need for separate reference ICs.
What thermal performance can be expected from SM72238TDE-3.3/NOPB in TO-252 package?
In the TO-252 (NDP0003B) package, SM72238TDE-3.3/NOPB has a junction-to-case thermal resistance of 5.4°C/W. With proper PCB copper pour under the exposed pad, it sustains 100mA continuous output at +125°C ambient. Derating is required above ~65°C ambient at full load; thermal shutdown activates at +150°C junction temperature to prevent damage.
Does SM72238TDE-3.3/NOPB support reverse polarity or reverse current protection?
No - SM72238TDE-3.3/NOPB lacks integrated reverse-polarity or reverse-current protection. Input voltage must remain positive relative to ground; reverse input voltage beyond −0.3V will damage the device. External protection (e.g., series Schottky diode or ideal diode controller) is required in battery-reversal-prone applications such as field-deployed solar systems.
SM72238TDE-3.3/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SolarMagic™
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- 14 mA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
SM72238TDE-3.3/NOPB FAQ
1.How can I place an order for SM72238TDE-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM72238TDE-3.3/NOPB 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 SM72238TDE-3.3/NOPB reliable?
The price and inventory of SM72238TDE-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM72238TDE-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for SM72238TDE-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM72238TDE-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM72238TDE-3.3/NOPB?
SM72238TDE-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM72238TDE-3.3/NOPB 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 SM72238TDE-3.3/NOPB?
For technical support, including SM72238TDE-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM72238TDE-3.3/NOPB requirements.
6.How does Aetrix verify that SM72238TDE-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All SM72238TDE-3.3/NOPB 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 SM72238TDE-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of SM72238TDE-3.3/NOPB?
All SM72238TDE-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM72238TDE-3.3/NOPB, 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 SM72238TDE-3.3/NOPB part is unused and in its original packaging.
Return procedure for SM72238TDE-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM72238TDE-3.3/NOPB Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
