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Texas Instruments TPS7A05285PDBVT
- Part No.:
- TPS7A05285PDBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS7A05285PDBVT.pdf
- Description:
- IC REG LIN 2.85V 200MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,479
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Product details
Overview
TPS7A05285PDBVT from Texas Instruments is a 200-mA, ultralow-quiescent-current LDO regulator with 2.85 V fixed output, 1 µA typical IQ, 235 mV max dropout at 200 mA (3.3 VOUT), and ±1% output accuracy - designed for battery-powered wearables and always-on subsystems requiring extended runtime and stable low-voltage bias.
For engineers reviewing the TPS7A05285PDBVT datasheet, TPS7A05285PDBVT pinout, TPS7A05285PDBVT application, or TPS7A05285PDBVT equivalent, this page delivers verified package mapping (SOT-23-5), validated ground current vs load behavior, confirmed active output discharge, foldback current limiting, and stability with ≥0.47 µF ceramic output capacitance - all critical for low-power system design and BOM optimization.
Technical Context
The TPS7A05285PDBVT implements a PMOS pass transistor architecture enabling ultralow IQ (1 µA typ) and fast transient response without external compensation. Its enable-controlled operation supports precise power sequencing in multi-rail systems, with EN logic thresholds (VEN(HI) = 0.9 V, VEN(LO) = 0.4 V) compatible with 1.8-V and higher GPIOs.
Thermal shutdown (160°C trip, 140°C reset) and foldback current limiting protect against overload and short-circuit faults. The device operates across –40°C to +125°C junction temperature and maintains regulation down to 1.4 V input - supporting single-cell Li-ion, Li-SOCl₂, and two-cell alkaline sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V ±1% (typical accuracy); enables direct replacement of 2.8 V/2.85 V rails without feedback resistor network. |
| Max Output Current | 200 mA continuous; sufficient for MCU cores, RF transceivers, and sensor signal chains in compact portable devices. |
| Quiescent Current | 1 µA typical, 3 µA max; extends battery life in always-on modes (e.g., RTC backup, wake-on-event circuits). |
| Dropout Voltage | 235 mV max at 200 mA (for 3.3 VOUT); for 2.85 VOUT, dropout is ≤222 mV (DBZ package) - ensures regulation from 3.07 V input. |
| Input Voltage Range | 1.4 V to 5.5 V; supports direct connection to single Li-ion (2.7–4.2 V), Li-SOCl₂ (3.0–3.6 V), or two-cell alkaline (2.0–3.2 V). |
| Stability Condition | Stable with ≥0.47 µF ceramic output capacitor; eliminates need for large tantalum or electrolytic caps in space-constrained layouts. |
| Enable Threshold | VEN(HI) = 0.9 V min, VEN(LO) = 0.4 V max; interoperable with 1.8-V I/O domains and open-drain controllers without level shifting. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm, surface-mount, thermally enhanced with exposed pad (not electrically connected). Pin 1 = IN, Pin 2 = GND, Pin 3 = EN, Pin 4 = NC, Pin 5 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply | Accepts 1.4–5.5 V; requires ≥1 µF ceramic decoupling placed adjacent to pin to minimize impedance and improve transient immunity. |
| GND (Pin 2) | Power ground | Primary return path for input, output, and internal circuitry; must connect directly to low-impedance PCB ground plane. |
| EN (Pin 3) | Enable control | Active-high logic input; tie to IN if always-on operation required; drives high-impedance state when floating (no pull-up needed). |
| NC (Pin 4) | No-connect | Internally unconnected; may be left floating or tied to GND for mechanical stability - no electrical function. |
| OUT (Pin 5) | Regulated output | Delivers 2.85 V ±1%; requires ≥0.47 µF ceramic capacitor to GND; output impedance <100 mΩ at 10 kHz ensures clean supply for noise-sensitive analog blocks. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ | 1 µA typical quiescent current enables >10-year battery life in 10-µA always-on applications (e.g., BLE beacon sleep mode). |
| Active Output Discharge | Internal pulldown resistor (~120 Ω) discharges OUT to GND within milliseconds upon disable - prevents floating voltage during power-down sequencing. |
| Foldback Current Limit | Reduces output current under short-circuit to ~65 mA (min), limiting power dissipation and enabling safe auto-recovery without thermal shutdown cycling. |
| Wide Input Range | 1.4 V minimum input allows use with depleted primary cells (e.g., Li-MnO₂ down to 1.5 V) and extends usable battery capacity. |
| High Accuracy | ±1% typical output tolerance over temperature and line/load ensures reliable operation of 2.85 V ADC references and low-voltage I/O interfaces. |
Applications
| Wearable Health Sensors | Always-On IoT Edge Node |
|---|---|
Use Scenario: Continuous ECG/PPG monitoring powered by coin-cell battery. IC Role / Device Role / Timing Role: Primary 2.85 V bias rail for analog front-end and ultra-low-power MCU. Use Value: 1 µA IQ extends CR2032 lifetime beyond 3 years in sleep mode; 235 mV dropout sustains regulation until battery reaches 3.085 V. |
Use Scenario: Sub-GHz wireless sensor node with periodic wake-up and BLE advertisement. IC Role / Device Role / Timing Role: Always-on LDO supplying real-time clock, wake-up timer, and RF transceiver standby power. Use Value: Active output discharge prevents back-powering of disabled RF section; ±1% accuracy ensures precise timing reference for low-power oscillator calibration. |
| Portable Medical Diagnostic Tool | Smart Remote Control with Voice |
Use Scenario: Handheld glucose meter using disposable alkaline batteries. IC Role / Device Role / Timing Role: Stable 2.85 V supply for precision ADC and electrochemical sensor interface. Use Value: 1.4 V minimum input supports full discharge of two-cell alkaline (down to 1.4 V/cell); foldback limit protects against sensor short during insertion. |
Use Scenario: IR+BLE remote with voice command mic and motion wake-up. IC Role / Device Role / Timing Role: Low-noise 2.85 V rail for MEMS microphone bias and DSP core. Use Value: 180 µVRMS output noise (10 Hz–100 kHz) avoids audible artifacts; EN pin enables synchronized power gating with SoC sleep states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A05285YKAR | DSBGA-4 (0.65 mm × 0.65 mm), no NC pin; same electrical specs but smaller footprint and different thermal resistance (RθJA = 198°C/W vs DBV's 185.6°C/W). | Better suited for ultra-dense wearable PCBs where SOT-23 height or routing space is constrained. | Select YKAR for space-critical designs; verify thermal margin with board-level copper pour due to higher RθJA. |
| MCP1700T-2802E/TT | 250 mA, 1.6 µA IQ, 600 mV dropout at 250 mA (2.8 V), SOT-23-3 (no EN pin); lacks active discharge and foldback limiting. | Applicable only in always-on, non-sequenced systems where enable control and fault recovery are unnecessary. | Choose MCP1700 only if EN functionality and output discharge are omitted from system requirements - not a drop-in replacement. |
Compared with TPS7A05285PDBVT, the YKAR offers identical regulation performance in a smaller package but requires careful thermal layout, while the MCP1700T-2802E/TT trades enable control and protection features for lower cost and simpler integration in static power rails.
Availability
TPS7A05285PDBVT is available at Aetrix Electronics and suitable for wearable electronics, always-on IoT edge nodes, and portable medical diagnostic tools requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS7A05285PDBVT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TPS7A05 product line delivers ultralow-IQ LDOs optimized for battery longevity in space-constrained, always-on applications - targeting wearables, remote sensors, and energy-harvesting systems where every nanoamp matters.
FAQ
What is the maximum input voltage rating for the TPS7A05285PDBVT?
The TPS7A05285PDBVT has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating range is 1.4 V to 5.5 V - ensuring compatibility with common battery chemistries including Li-ion, Li-SOCl₂, and alkaline cells. The TPS7A05285PDBVT maintains regulation and specified accuracy across this full range.
Does the TPS7A05285PDBVT require an external pull-up resistor on the EN pin?
No, the TPS7A05285PDBVT does not require an external pull-up resistor on the EN pin. Its EN input draws only 10 nA at 5.5 V, and the internal logic thresholds (VEN(HI) ≥ 0.9 V, VEN(LO) ≤ 0.4 V) allow direct connection to microcontroller GPIOs or tying to IN for always-on operation. Floating EN is acceptable but not recommended for production systems due to potential noise susceptibility.
Can the TPS7A05285PDBVT operate with a 0.47 µF output capacitor?
Yes, the TPS7A05285PDBVT is explicitly characterized and guaranteed stable with a minimum 0.47 µF ceramic output capacitor - no additional ESR or series resistance required. This enables use of small, low-profile X5R/X7R MLCCs in tight layouts. Larger capacitors (up to 22 µF) further improve transient response and PSRR, but 0.47 µF meets all stability criteria per the TPS7A05285PDBVT datasheet.
What is the thermal shutdown behavior of the TPS7A05285PDBVT?
The TPS7A05285PDBVT activates thermal shutdown at TJ = 160°C and resets at TJ = 140°C (20°C hysteresis). During shutdown, the pass transistor turns off and the output is discharged via the internal pulldown resistor (~120 Ω). This behavior protects the device and PCB during sustained overload or poor heatsinking. Recovery is automatic once junction temperature falls below the reset threshold.
Is the TPS7A05285PDBVT pin-compatible with other TPS7A05 variants?
The TPS7A05285PDBVT (SOT-23-5) shares the same pinout as other DBV-package TPS7A05 variants (e.g., TPS7A0533PDBVT), differing only in fixed output voltage. It is not pin-compatible with DQN (X2SON-4), YKA (DSBGA-4), or DBZ (SOT-23-3) variants due to differing pin counts and assignments. Always verify package-specific pin functions before board reuse.
TPS7A05285PDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.308V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 3 µA
- Current - Supply (Max):
- -
- PSRR:
- 40dB (1kHz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS7A05285PDBVT FAQ
1.How can I place an order for TPS7A05285PDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7A05285PDBVT 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 TPS7A05285PDBVT reliable?
The price and inventory of TPS7A05285PDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7A05285PDBVT is usually 5 days.
3.What payment methods are accepted for TPS7A05285PDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7A05285PDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7A05285PDBVT?
TPS7A05285PDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7A05285PDBVT 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 TPS7A05285PDBVT?
For technical support, including TPS7A05285PDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7A05285PDBVT requirements.
6.How does Aetrix verify that TPS7A05285PDBVT is sourced from the original manufacturer or authorized distributors?
All TPS7A05285PDBVT 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 TPS7A05285PDBVT meets industry standards.
7.What is the process for return or replacement of TPS7A05285PDBVT?
All TPS7A05285PDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS7A05285PDBVT, 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 TPS7A05285PDBVT part is unused and in its original packaging.
Return procedure for TPS7A05285PDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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