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Texas Instruments TLV1117LV33DCYR
- Part No.:
- TLV1117LV33DCYR
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-4, TO-261AA
- Description:
- IC REG LINEAR 3.3V 1A SOT223-4
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
TLV1117LV33DCYR - 3.3 V, 1 A Low-Dropout Regulator
Texas Instruments TLV1117LV33DCYR is a fixed 3.3 V, 1 A positive low-dropout linear regulator supplied in the 4-pin DCY SOT-223 package on large tape and reel.
Electrical limits, pin functions, package drawing, and ordering status were checked against the Texas Instruments TLV1117LV data sheet and the manufacturer page for this exact orderable part number.
Overview
The TLV1117LV33DCYR provides a factory-set 3.3 V output for loads from 0 A to 1 A. It operates from a 2 V to 5.5 V input range, subject to sufficient dropout headroom for regulation. Low quiescent current, zero-minimum-load stability, ceramic-capacitor compatibility, current limiting, and thermal shutdown make it suitable for compact low-voltage rails.
Key Advantages
Full 1 A capability
The recommended operating range supports output current from zero load through 1 A when voltage headroom and thermal conditions are satisfied.
Low standby overhead
Quiescent current is 50 microamperes typical and 100 microamperes maximum at zero load.
Ceramic-capacitor stability
Internal compensation supports output capacitors with 0-ohm ESR, including compact ceramic types.
Integrated protection
Current limiting and thermal shutdown help protect the regulator during overload and excessive junction temperature.
Feature Summary
Fixed 3.3 V output
No external feedback divider is needed for the nominal output voltage.
Zero minimum load
The regulator remains stable at 0 mA output current, supporting standby rails with widely varying load.
Supply rejection
The family specification includes 65 dB typical PSRR at 100 Hz under the stated 1.8 V-output test condition.
Fast startup
Typical startup time is 100 microseconds with a 1 microfarad output capacitor and a 1 A load under the data-sheet condition.
Package & Footprint
Texas Instruments identifies the DCY package as a 4-pin SOT-223 with a nominal 6.50 mm by 3.50 mm body. The mechanical drawing references JEDEC TO-261, matching the catalog's registered TO-261-4 and TO-261AA aliases.
- Use the TI DCY0004A land pattern and verify the pin-1 orientation.
- Treat pin 4, the metal tab, as OUT rather than an isolated thermal pad.
- Place the input and output capacitors close to their respective pins and ground return.
- Use adequate copper area and calculate junction temperature for the actual power dissipation.
The registered local and production JPGs were checked as a three-lead-plus-tab SOT-223 / TO-261 package representation.
Pin Functions
The assignment below applies to the 4-pin DCY SOT-223 package shown from the top.
Do not assume the tab is ground. Confirm the DCY package drawing before PCB release.
Key Specifications
| Manufacturer | Texas Instruments |
|---|---|
| Regulator type | Positive fixed-output low-dropout linear regulator |
| Nominal output voltage | 3.3 V |
| Recommended input range | 2 V to 5.5 V, with required dropout headroom |
| Recommended output current | 0 A to 1 A |
| DC output accuracy | +/-1.5% for output voltages above 2 V |
| Dropout voltage at 1 A | 455 mV typical, 700 mV maximum for VOUT at or above 3.3 V |
| Quiescent current | 50 microamperes typical, 100 microamperes maximum at 0 mA load |
| Minimum current limit | 1.1 A at VOUT equal to 90% of nominal |
| Load regulation | 1 mV typical, 35 mV maximum from 0 mA to 1 A |
| Operating junction temperature | -40 degrees C to +125 degrees C |
| Package | 4-pin SOT-223 (DCY), JEDEC TO-261 reference |
| Shipping media | Large tape and reel, 2500 units per manufacturer package |
Typical and maximum values apply only under their stated test conditions. Confirm capacitor, dropout, and thermal margins in the final design.
Replacement Considerations
A candidate replacement must match the fixed 3.3 V output, 1 A load requirement, SOT-223 footprint, GND/OUT/IN pin order, output-connected tab, input range, dropout performance, capacitor stability, and thermal limits. Similar 1117-family regulators can differ in input-voltage rating, quiescent current, minimum-load requirement, and tab connection.
No catalog part is presented as an unconditional substitute without an exact API-confirmed record and a circuit-level engineering review.
Manufacturer Information
Texas Instruments lists TLV1117LV33DCYR as an active production orderable device. In the code, TLV1117LV identifies the low-input-voltage regulator family, 33 identifies the 3.3 V fixed output, DCY identifies the SOT-223 package, and R identifies the 2500-piece large tape-and-reel option.
Applications
Post-regulation
Generate a quieter 3.3 V rail after a higher-voltage switching supply when the required headroom is available.
Portable electronics
Low quiescent current supports battery-powered subsystems with long standby intervals.
Logic and peripheral rails
Provide a fixed 3.3 V supply for digital, sensor, and interface loads within the current and thermal limits.
Variable-load systems
Zero-minimum-load stability supports rails that alternate between standby and high-current operation.
Quality & Authenticity
Verify the full TLV1117LV33DCYR order code, reel label, TI marking, date and lot traceability, SOT-223 dimensions, and pin-1 orientation during incoming inspection. Package appearance alone does not establish identity or authenticity. Electrical checks should follow the latest TI limits and test conditions.
FAQ
What output does TLV1117LV33DCYR provide?
It provides a factory-set 3.3 V output and is rated for loads up to 1 A within dropout and thermal constraints.
Is a minimum output load required?
No. TI specifies stable operation with 0 mA output current.
Is the SOT-223 tab connected to ground?
No. For this DCY package, pin 2 and the tab are both connected to OUT.
What capacitors are used in the typical circuit?
The TI typical application shows 1 microfarad at both input and output; select real capacitors with adequate voltage and temperature derating.
Can VIN be 2 V while regulating 3.3 V?
No. This is a linear regulator and cannot boost voltage; VIN must exceed 3.3 V by the required dropout margin.
Engineering Notice
Validate input headroom, line and load transients, output-capacitor effective capacitance, startup behavior, and junction temperature in the final PCB. Power dissipation is approximately (VIN minus VOUT) multiplied by load current, so copper area and airflow can determine the usable continuous current well before the electrical 1 A limit.
TLV1117LV33DCYR Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 800mA
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-4
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