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Texas Instruments TPS7A1633DRBT
- Part No.:
- TPS7A1633DRBT
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS7A1633DRBT.pdf
- Description:
- IC REG LINEAR 3.3V 100MA 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,955
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Product details
Overview
TPS7A1633DRBT from Texas Instruments is a fixed-output 3.3-V, 100-mA ultralow-quiescent-current LDO voltage regulator in an 8-pin VSON (DRB) package. It operates from 3 V to 60 V input, delivers 5 µA typical quiescent current at no load, features integrated power-good with programmable delay, and supports automotive-grade temperature range (–40°C to +125°C). It is used in battery-backed microcontroller systems requiring long standby life under high-input-voltage transients.
For engineers reviewing the TPS7A1633DRBT datasheet, TPS7A1633DRBT pinout, TPS7A1633DRBT application, or TPS7A1633DRBT equivalent, key selection criteria include its 60-V max input rating, 5-µA IQ, 2% output accuracy, programmable PG delay via external capacitor, and thermal shutdown/overcurrent protection - all validated for automotive and industrial backup-power designs.
Technical Context
The TPS7A1633DRBT implements a PMOS pass transistor architecture enabling ultra-low dropout (60 mV at 20 mA) and stable regulation across wide input ranges. Its internal reference (1.193 V typ) feeds an error amplifier controlling the pass device, while dedicated EN and PG pins support precise power-rail sequencing in microcontroller-based systems.
Power-good functionality is implemented as an open-drain output with user-programmable delay (via CDELAY), trip threshold at 85%–95% of VOUT, and hysteresis of 2.3%–4%. The device enters shutdown at VEN ≤ 0.3 V, drawing only 0.59–5 µA, and includes undervoltage lockout (2.7 V) and thermal shutdown (170°C trip / 150°C release).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 60 V - supports direct connection to multi-cell Li-ion packs, automotive batteries, and industrial 24/48-V rails without pre-regulation. |
| Output Voltage | Fixed 3.3 V ±2% - eliminates external feedback resistors and simplifies layout for noise-sensitive digital logic supplies. |
| Quiescent Current | 5 µA typ at no load - enables >10-year battery life in always-on smoke detectors or remote sensors powered by coin cells. |
| Dropout Voltage | 60 mV at 20 mA - maintains regulation even when VIN drops to 3.36 V, critical during brownout conditions in automotive start-stop cycles. |
| Power-Good Delay | User-programmable via CDELAY (e.g., 12 ms with 10 nF) - ensures reliable MCU reset timing after cold-start or wake-up events. |
| Thermal Protection | 170°C shutdown / 150°C recovery - prevents permanent damage during sustained overload or poor PCB heatsinking in enclosed enclosures. |
| Output Current | 100 mA continuous - sufficient to power low-power MCUs (e.g., MSP430, STM32L), CAN transceivers, and sensor interfaces. |
| Stability | Stable with ≥2.2 µF ceramic output capacitor - eliminates need for electrolytic or tantalum caps, improving reliability and reducing board area. |
Pinout & Package
TPS7A1633DRBT uses an 8-pin VSON (DRB) package measuring 3.0 mm × 3.0 mm with exposed PowerPAD™ for enhanced thermal dissipation (RθJB = 11.3°C/W). The PowerPAD must be soldered to the PCB ground plane to meet thermal specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Regulated output | Delivers stable 3.3 V; requires ≥2.2 µF ceramic capacitor to GND for stability and transient response. |
| FB/DNC (Pin 2) | Feedback / Do-not-connect | Fixed-output version: must remain unconnected - routing to any net risks regulation failure or instability. |
| PG (Pin 3) | Open-drain power-good | Asserts low when VOUT falls below 83%–93% of nominal; requires external pull-up to ≤5 V rail for logic-level interfacing. |
| GND (Pin 4) | Ground reference | Primary return path for IN, OUT, and PG; connects directly to PowerPAD for optimal thermal performance. |
| DELAY (Pin 7) | PG delay timer control | Charges external capacitor to set PG assertion delay; open if delay not required (PG asserts immediately on regulation). |
| EN (Pin 5) | Enable input | CMOS-compatible; enables regulator when VEN ≥ 1.2 V; disable threshold is 0.3 V - allows direct MCU GPIO control. |
| IN (Pin 8) | Unregulated input | Accepts up to 60 V; requires ≥0.1 µF ceramic bypass cap close to pin to suppress high-frequency noise and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ (5 µA) | Enables decade-scale battery life in always-on IoT edge nodes and security sensors without compromising startup speed. |
| 60-V Input Rating | Withstands automotive load-dump transients (ISO 7637-2 Pulse 5a) and high-cell-count power-tool battery packs without external TVS. |
| Programmable PG Delay | Allows precise coordination of system power-up sequence (e.g., wait for 3.3-V rail to settle before releasing MCU reset). |
| Integrated Protections | Combines overcurrent limit (225 mA typ), thermal shutdown (170°C), and UVLO (2.7 V) - reduces BOM count and design risk. |
| Ceramic-Capacitor Stability | Eliminates ESR dependency, enabling use of small, reliable, low-ESR X7R/X5R ceramics instead of aging-prone electrolytics. |
Applications
| Automotive Infotainment Power Supply | Smoke Detector Backup Regulator |
|---|---|
Use Scenario: Powers MCU, display controller, and audio codec in car head units exposed to 12-V battery with load-dump spikes up to 60 V. IC Role / Device Role / Timing Role: Primary 3.3-V LDO delivering regulated supply; PG signal synchronizes MCU boot with stable rail. Use Value: Eliminates need for upstream buck converter or discrete TVS, reducing cost and board space while meeting AEC-Q100 stress requirements. |
Use Scenario: Provides always-on 3.3-V supply to CO/Smoke sensing circuitry and wireless alarm transmitter from 9-V alkaline battery. IC Role / Device Role / Timing Role: Standby-mode regulator maintaining MCU in deep-sleep; EN pin controlled by sensor interrupt. Use Value: 5-µA quiescent current extends battery life beyond 10 years - exceeding UL 217 certification requirements for residential detectors. |
| Industrial PLC I/O Module | Power-Tool Battery Management System |
Use Scenario: Supplies isolated communication ICs (RS-485, CAN) and analog front-end in DIN-rail mounted controllers operating from 24-V DC bus. IC Role / Device Role / Timing Role: Secondary LDO generating clean 3.3-V domain; PG confirms rail integrity before enabling fieldbus transceivers. Use Value: 60-V input tolerance handles 24-V bus surges and reverse-polarity faults; thermal shutdown prevents latch-up during short-circuit events. |
Use Scenario: Generates 3.3-V logic supply from 18–60-V multi-cell Li-ion pack in cordless drills and saws during motor stall and regenerative braking. IC Role / Device Role / Timing Role: Post-regulator for MCU and Hall-effect sensors; DELAY pin configures PG delay to avoid false resets during voltage sag. Use Value: Maintains regulation down to 3.36 V input (60 mV dropout), ensuring uninterrupted operation during high-current motor bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A1650DRBT | Fixed 5-V output; identical package, IQ, input range, and feature set. | Used where system requires 5-V logic or interface voltage instead of 3.3 V. | Select when target rail is 5 V - same thermal, layout, and qualification profile; no redesign needed beyond output cap value. |
| MAX5023ASA+T | 3.3-V fixed LDO; 12-V max input, 12 µA IQ, no PG or delay; SO-8 package. | Suitable for low-voltage, non-automotive applications where 60-V tolerance and power sequencing are unnecessary. | Choose only for cost-sensitive, low-input-voltage (<15 V) designs lacking PG requirements - not drop-in due to lower voltage rating and missing features. |
Compared with TPS7A1633DRBT, TPS7A1650DRBT offers identical performance at 5 V, enabling seamless rail migration; MAX5023ASA+T lacks high-voltage capability and power-good, limiting it to simpler, lower-risk applications where those features are omitted by design.
Availability
TPS7A1633DRBT is available at Aetrix Electronics and suitable for automotive infotainment systems, battery-powered safety alarms, and industrial PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for TPS7A1633DRBT 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 technologies, with decades of automotive and industrial qualification expertise.
The TPS7A16 family was designed specifically for ultralow-power, high-input-voltage LDO applications in battery-backed and transient-prone environments - targeting smoke detectors, automotive ECUs, and portable power tools.
FAQ
What is the maximum input voltage rating for the TPS7A1633DRBT?
The TPS7A1633DRBT supports a maximum input voltage of 60 V, verified per Absolute Maximum Ratings in the official datasheet (SBVS171F). This rating enables direct connection to automotive batteries and high-cell-count Li-ion packs without external protection circuitry, provided power dissipation remains within thermal limits.
Does the TPS7A1633DRBT require external feedback resistors to set its output voltage?
No, the TPS7A1633DRBT is a fixed-output 3.3-V regulator. Its FB/DNC pin (Pin 2) must remain unconnected - routing it to GND, IN, or any other net will disrupt regulation. This eliminates resistor tolerance errors and simplifies layout compared to adjustable LDOs like the TPS7A1601.
How is the power-good delay time configured on the TPS7A1633DRBT?
The TPS7A1633DRBT uses an external capacitor (CDELAY) connected between the DELAY pin (Pin 7) and GND to set power-good delay. The delay time is calculated as tDELAY = (CDELAY × 1.193 V) / 1 µA - for example, a 10-nF capacitor yields ~12 ms. Leaving DELAY open disables the delay function entirely.
What thermal performance can be expected from the TPS7A1633DRBT in its DRB package?
In the 3.0 mm × 3.0 mm VSON (DRB) package, the TPS7A1633DRBT achieves RθJB = 11.3°C/W when the PowerPAD is soldered to the PCB ground plane. This allows >500 mW power dissipation at +85°C ambient - sufficient for 100-mA loads at 12-V input, assuming proper copper pour and via placement per TI layout guidelines.
Is the TPS7A1633DRBT compatible with ceramic output capacitors?
Yes, the TPS7A1633DRBT is explicitly characterized and guaranteed stable with ≥2.2 µF ceramic output capacitors (X7R/X5R dielectric), as confirmed in Section 6.5 and Application Note SBVS171F. TI recommends 10-µF ceramics for optimal AC performance, eliminating reliance on higher-ESR electrolytic or tantalum types.
TPS7A1633DRBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 15 µA
- Current - Supply (Max):
- -
- PSRR:
- 50dB (100Hz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
TPS7A1633DRBT FAQ
1.How can I place an order for TPS7A1633DRBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7A1633DRBT 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 TPS7A1633DRBT reliable?
The price and inventory of TPS7A1633DRBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7A1633DRBT is usually 5 days.
3.What payment methods are accepted for TPS7A1633DRBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7A1633DRBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7A1633DRBT?
TPS7A1633DRBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7A1633DRBT 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 TPS7A1633DRBT?
For technical support, including TPS7A1633DRBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7A1633DRBT requirements.
6.How does Aetrix verify that TPS7A1633DRBT is sourced from the original manufacturer or authorized distributors?
All TPS7A1633DRBT 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 TPS7A1633DRBT meets industry standards.
7.What is the process for return or replacement of TPS7A1633DRBT?
All TPS7A1633DRBT units undergo pre-shipment inspection (PSI). If there is an issue with TPS7A1633DRBT, 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 TPS7A1633DRBT part is unused and in its original packaging.
Return procedure for TPS7A1633DRBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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