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Texas Instruments TPS77833D
- Part No.:
- TPS77833D
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS77833D.pdf
- Description:
- IC REG LINEAR 3.3V 750MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,934
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Product details
Overview
TPS77833D from Texas Instruments is a 3.3-V, 750-mA low-dropout (LDO) voltage regulator with integrated open-drain power-good (PG) output, PMOS pass element, 260-mV typical dropout at 750 mA, ±2% output voltage tolerance over line/load/temperature, and thermal shutdown protection. It delivers stable power to microcontroller cores, DSPs, and FPGA I/O banks in battery-powered portable instrumentation.
For engineers reviewing the TPS77833D datasheet, TPS77833D pinout, TPS77833D application, or TPS77833D equivalent, key selection criteria include PG assertion threshold (92–98% VO), ultra-low 85-µA quiescent current across full load range, SOIC-8 package thermal performance, and compatibility with 10-µF low-ESR output capacitors for fast transient response.
Technical Context
The TPS77833D uses a PMOS pass transistor enabling dropout voltage directly proportional to output current and quiescent current independent of load-85 µA from 0 to 750 mA. Its internal 1.1834-V reference and error amplifier regulate output with 2% accuracy across −40°C to 125°C junction temperature.
Power-good (PG) is an open-drain output asserting low when VO drops below 92–98% of nominal 3.3 V, with 0.5% hysteresis and 1-µA leakage at 5 V. Enable (EN) input accepts TTL-compatible logic (VIH ≥ 1.7 V, VIL ≤ 0.9 V) to enter 1-µA standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% over line, load, and −40°C to 125°C - ensures reliable logic-level compliance for 3.3-V digital systems. |
| Max Output Current | 750 mA continuous - supports moderate-power SoC domains without external current boosting. |
| Dropout Voltage | 260 mV typical at 750 mA - enables regulation from 3.56 V input, critical for single-cell Li-ion or multi-cell alkaline systems. |
| Quiescent Current | 85 µA typical (0–750 mA load) - extends battery runtime in always-on sensor nodes and wearables. |
| Power-Good Threshold | 92–98% VO with 0.5% hysteresis - provides robust undervoltage detection without chatter during brownout recovery. |
| Enable Logic Threshold | VIH ≥ 1.7 V, VIL ≤ 0.9 V - interfaces directly with 3.3-V or 5-V GPIO without level-shifting. |
| Thermal Shutdown | 150°C typical activation - protects device under sustained overload or poor PCB heatsinking. |
Pinout & Package
TPS77833D is housed in an 8-pin SOIC (D) package with exposed pad not connected internally; GND pin (Pin 1) serves as primary regulator ground and thermal path. The package supports 568 mW free-air power dissipation at 25°C (derating 5.68 mW/°C above).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Regulator ground reference and primary thermal conduction path to PCB copper. |
| 2 | EN | Active-high enable input; drives regulator into 1-µA shutdown when pulled low. |
| 3, 4 | IN | Dual-input pins reduce trace inductance and IR drop; accept 2.7–10 V input range. |
| 5, 6 | OUT | Dual-output pins lower impedance and improve transient response for high di/dt loads. |
| 7 | FB/NC | No-connect for fixed 3.3-V version; unused feedback node (not bonded). |
| 8 | PG | Open-drain power-good output; requires external pullup to monitor regulated output health. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Element | Enables load-independent quiescent current and linear dropout behavior-no base-drive current or saturation effects. |
| Stable with 10-µF Low-ESR Cap | Eliminates need for minimum load or complex compensation; supports ceramic, tantalum, and aluminum electrolytic types. |
| Integrated Power-Good (PG) | Provides system-level power sequencing and fault reporting without external comparators or RC delays. |
| Thermal + Current Protection | Combines foldback current limiting (~1.7 A peak) and 150°C thermal shutdown to prevent catastrophic failure. |
| TTL-Compatible Enable | Direct interface with MCU GPIO; no external logic required to implement controlled power-up/down sequencing. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Continuous glucose monitor with Bluetooth LE radio and analog front-end. IC Role / Device Role / Timing Role: Primary 3.3-V supply for RF transceiver and ADC, with PG signaling valid rail to host MCU. Use Value: 85-µA quiescent current extends coin-cell life beyond 12 months; 260-mV dropout enables operation down to 3.56 V input. |
Use Scenario: DIN-rail mounted digital input module powered from 24-V DC bus. IC Role / Device Role / Timing Role: Local 3.3-V LDO for isolated microcontroller and optocoupler drivers. Use Value: Dual IN/OUT pins reduce PCB trace resistance; PG output triggers watchdog reset if 24-V supply sags below 18 V. |
| Automotive Body Control Units | Test & Measurement Equipment |
|
Use Scenario: Door module with LIN transceiver, EEPROM, and LED drivers. IC Role / Device Role / Timing Role: Secondary 3.3-V rail derived from 5-V pre-regulator, monitored via PG for diagnostics. Use Value: −40°C to 125°C operating range meets AEC-Q100 Grade 2; 2% tolerance ensures CAN/LIN PHY timing margin. |
Use Scenario: Bench multimeter with precision ADC and LCD controller. IC Role / Device Role / Timing Role: Clean 3.3-V supply for SAR ADC reference and display driver, decoupled from noisy digital rails. Use Value: 60-dB PSRR at 1 kHz suppresses switching noise from adjacent DC/DC converters; low output impedance (<100 mΩ @ 100 kHz) stabilizes dynamic loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76733D | Higher 125-µA quiescent current; 350-mV dropout at 750 mA; no PG output - only RESET on TPS777xx variant. | Lacks power-good monitoring; requires external circuitry for system reset coordination. | Select when PG functionality is unnecessary and cost sensitivity outweighs efficiency trade-offs. |
| MCP1826-3302E/DB | 800-mA rated output; 300-mV dropout; 50-µA quiescent current; active-high PG; SOIC-8 package. | Lower IQ improves battery life; active-high PG simplifies pullup design but differs from TPS77833D's open-drain logic. | Prefer for new designs prioritizing ultra-low IQ and simplified PG interface, accepting different threshold hysteresis (1.5%). |
Compared with TPS77833D, TPS76733D lacks integrated PG and consumes more quiescent current, while MCP1826-3302E/DB offers lower IQ and active-high PG but diverges in trip-point hysteresis and transient response profile-requiring revalidation in noise-sensitive signal chains.
Availability
TPS77833D is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS77833D 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS778xx family was engineered for high-efficiency, low-noise local regulation in space-constrained battery-powered systems-emphasizing ultra-low IQ, fast transient response, and integrated power supervision.
FAQ
What is the maximum input voltage rating for the TPS77833D?
The absolute maximum input voltage for the TPS77833D is 13.5 V. Operation above this level risks permanent damage. Recommended operating input voltage is 2.7 V to 10 V, with minimum VIN = VOUT + VDO (≥3.56 V at 750 mA). Exceeding 10 V violates recommended conditions even if below absolute max.
Does the TPS77833D require a minimum load current to maintain regulation?
No, the TPS77833D is stable at zero load. Unlike many older LDOs, it imposes no minimum load requirement due to its PMOS pass architecture and internal compensation optimized for 10-µF output capacitors across the full 0–750 mA range.
How does the power-good (PG) output of the TPS77833D behave during startup?
The PG output remains low until VO reaches 92% of 3.3 V (≈3.04 V), then transitions high after a brief stabilization delay. It does not assert during initial power ramp but monitors steady-state regulation-ensuring downstream logic only initializes when voltage is within functional specification.
Can the TPS77833D be used with ceramic output capacitors?
Yes, the TPS77833D is explicitly characterized for stability with 10-µF ceramic capacitors having ESR between 50 mΩ and 1.5 Ω. Multilayer ceramic (MLCC) types meeting these ESR constraints are fully supported and recommended for low-profile, high-reliability designs.
What thermal derating applies to the TPS77833D in a standard SOIC-8 footprint without forced airflow?
In still air (0 CFM), the TPS77833D's SOIC-8 package has a 5.68 mW/°C derating factor above 25°C ambient. At 70°C ambient, maximum allowable dissipation drops to 312 mW-corresponding to ~370 mA at 3.3-V output with 4.3-V input (PD = (4.3−3.3)×0.37 = 370 mW).
TPS77833D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.43V @ 750mA
- Current - Output:
- 750mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable, Power Good, Reset
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS77833D FAQ
1.How can I place an order for TPS77833D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77833D 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 TPS77833D reliable?
The price and inventory of TPS77833D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77833D is usually 5 days.
3.What payment methods are accepted for TPS77833D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77833D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS77833D?
TPS77833D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77833D 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 TPS77833D?
For technical support, including TPS77833D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77833D requirements.
6.How does Aetrix verify that TPS77833D is sourced from the original manufacturer or authorized distributors?
All TPS77833D 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 TPS77833D meets industry standards.
7.What is the process for return or replacement of TPS77833D?
All TPS77833D units undergo pre-shipment inspection (PSI). If there is an issue with TPS77833D, 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 TPS77833D part is unused and in its original packaging.
Return procedure for TPS77833D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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