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Texas Instruments TPS60402DBVT
- Part No.:
- TPS60402DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS60402DBVT.pdf
- Description:
- IC REG CHG PUMP INV 60MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:24,232
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Product details
Overview
TPS60402DBVT from Texas Instruments is an unregulated charge-pump voltage inverter IC that generates a negative output voltage (–VI) from a 1.6 V to 5.5 V input, delivers up to 60 mA output current, operates at a fixed 50-kHz switching frequency, and requires only three 1-µF ceramic capacitors. It is used in portable instrumentation for sensor biasing where compact size and low quiescent current are critical.
For engineers reviewing the TPS60402DBVT datasheet, TPS60402DBVT pinout, TPS60402DBVT application, or TPS60402DBVT equivalent, key selection criteria include its fixed 50-kHz operation, 15-Ω typical output resistance at 5 V input, integrated active Schottky-diode for reliable start-up into load, and SOT-23-5 package compatibility with space-constrained battery-powered designs.
Technical Context
The TPS60402DBVT implements a two-phase switched-capacitor topology: during phase one, the flying capacitor (Cfly) charges to VI; during phase two, it connects in series with the output to invert polarity. Its fixed 50-kHz oscillator ensures predictable ripple frequency and simplifies EMI filtering compared to variable-frequency variants.
No regulation loop is present - output voltage follows VO ≈ –(VI – RO × IO), where RO = 15 Ω typ. at 25°C and 5 V input. Integrated active Schottky-diode circuitry prevents positive output excursion during startup, eliminating external diode requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.6 V to 5.5 V - supports single Li-ion, dual/triple alkaline/NiMH cells without pre-regulation |
| Output Current | 60 mA max - sufficient for LCD bias, RF GaAs amplifier bias, and low-power op-amp rails |
| Switching Frequency | Fixed 50 kHz - enables consistent filter design and avoids audible noise in portable systems |
| Quiescent Current | 120 µA typ. - minimizes standby power loss in battery-critical applications |
| Output Resistance | 15 Ω typ. at 5 V - defines load regulation: e.g., 30 mA load causes ~0.45 V droop from ideal –5 V |
| Capacitor Requirement | Three 1-µF ceramic caps - enables full solution in <50 mm² board area using low-ESR MLCCs |
| Package | SOT-23-5 (2.90 mm × 1.60 mm) - surface-mount compatible with standard reflow and automated assembly |
Pinout & Package
TPS60402DBVT is housed in a 5-pin SOT-23 package (2.90 mm × 1.60 mm body), optimized for minimal PCB footprint and thermal performance (RθJA = 221.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Power output | Delivers inverted voltage (–VI) to load; bypass to GND with 1-µF CO capacitor |
| IN (Pin 2) | Supply input | Accepts 1.6–5.5 V input; requires local 1-µF CI bypass to GND |
| CFLY– (Pin 3) | Flying capacitor negative terminal | Connects to negative side of 1-µF Cfly; internal switch node in charge-transfer cycle |
| GND (Pin 4) | Ground reference | Common return for IN, OUT, and Cfly; must be low-impedance for stable inversion |
| CFLY+ (Pin 5) | Flying capacitor positive terminal | Connects to positive side of 1-µF Cfly; internal switch node synchronized with oscillator |
Key Features
| Feature | Design Value |
|---|---|
| Integrated active Schottky-diode | Eliminates need for external diode during startup, preventing positive output excursion into capacitive loads |
| Fixed 50-kHz switching | Ensures repeatable output ripple spectrum for deterministic EMI mitigation and LC/RC post-filter design |
| Low-output-resistance architecture | 15 Ω typical output impedance enables stable –4.5 V output at 30 mA (vs. ideal –5 V), supporting precision analog rails |
| Ultra-low quiescent current | 120 µA typical no-load supply current extends battery life in always-on sensor monitoring circuits |
| Minimal external component count | Only three 1-µF ceramic capacitors required - reduces BOM cost, assembly steps, and failure points |
Applications
| LCD Bias Generation | GaAs RF Power Amplifier Bias |
|---|---|
Use Scenario: Providing negative gate bias for TFT-LCD source driver ICs in handheld medical displays. IC Role / Device Role / Timing Role: Charge-pump voltage inverter generating –3.3 V rail from 3.3 V main supply. Use Value: Enables single-supply system architecture while meeting LCD VGL specification with <15 mV ripple at 50 kHz. | Use Scenario: Supplying –2.5 V gate bias to GaAs FETs in 2.4 GHz ISM-band transceivers. IC Role / Device Role / Timing Role: Unregulated inverter delivering stable negative bias under pulsed RF load (10–50 mA peak). Use Value: Fixed 50-kHz operation avoids interference with RF carrier; 15 Ω output resistance ensures <100 mV droop at 25 mA load. |
| Sensor Supply in Portable Instruments | Bipolar Operational Amplifier Supply |
Use Scenario: Powering MEMS pressure sensors requiring symmetric ±2.5 V rails in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Inverting half of a rail-splitter configuration (with TPS60402DBVT + LDO or resistor divider). Use Value: 120 µA quiescent current preserves multi-year battery life; SOT-23-5 footprint fits within 8-mm² sensor module. | Use Scenario: Generating –2.5 V rail for rail-to-rail op-amps in portable EEG front-ends. IC Role / Device Role / Timing Role: Negative supply generator paired with 2.5 V LDO to create bipolar ±2.5 V analog domain. Use Value: Three 1-µF ceramic caps enable full solution in <50 mm²; 60 mA capability supports multiple op-amp channels simultaneously. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge-pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60401DBVT | Fixed 20-kHz switching frequency; requires 10-µF flying/output capacitors | Lower ripple at light loads but larger capacitor footprint; higher output impedance (~15 Ω still applies) | Select when lower EMI sensitivity or legacy 10-µF cap inventory exists |
| TPS60403DBVT | Fixed 250-kHz switching frequency; uses 1-µF capacitors; 425 µA typical quiescent current | Enables smaller LC filters but increases no-load power draw; better transient response | Select when fast load-step response or ultra-low output ripple (<15 mVP-P) is prioritized over battery runtime |
Compared with TPS60401DBVT and TPS60403DBVT, the TPS60402DBVT strikes a balance between capacitor size (1 µF), quiescent current (120 µA), and switching frequency (50 kHz), making it optimal for mid-duty-cycle portable instrumentation where board area and standby power are both constrained.
Availability
TPS60402DBVT is available at Aetrix Electronics and suitable for LCD bias generation, GaAs RF amplifier biasing, and sensor supply in portable instruments requiring stable component supply across production lifecycles.
Supply support for TPS60402DBVT 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 expertise in high-efficiency DC-DC conversion.
The TPS6040x family was designed specifically for space- and power-constrained portable electronics needing compact, capacitor-only negative voltage generation - targeting medical devices, handheld test equipment, and battery-powered RF modules.
FAQ
What is the maximum output current capability of the TPS60402DBVT?
The TPS60402DBVT delivers up to 60 mA of continuous output current at the OUT pin under recommended operating conditions (input voltage 1.6 V to 5.5 V, ambient temperature –40°C to 125°C). At 60 mA load and 5 V input, output voltage typically drops to approximately –4.1 V due to its 15 Ω output resistance. Derating is advised above 85°C ambient per thermal data in the datasheet.
Does the TPS60402DBVT require external diodes for startup?
No, the TPS60402DBVT integrates active Schottky-diode circuitry to prevent positive output excursion during initial power-up, eliminating the need for an external diode. This feature ensures safe start-up into capacitive or resistive loads and reduces bill-of-materials count and PCB area - a key differentiator versus discrete charge-pump implementations.
What capacitor values are required for proper operation of the TPS60402DBVT?
The TPS60402DBVT requires exactly three 1-µF ceramic capacitors: one input bypass capacitor (CI), one flying capacitor (Cfly), and one output filter capacitor (CO). All must be X5R/X7R MLCCs with low ESR (e.g., 0805 or 1206 case size). Using values other than 1 µF - especially smaller ones - degrades output resistance and maximum deliverable current.
How does the TPS60402DBVT differ from the TPS60400DBVT in terms of switching behavior?
The TPS60402DBVT uses a fixed 50-kHz internal oscillator, whereas the TPS60400DBVT employs a variable-frequency architecture (50–250 kHz) that reduces quiescent current under light loads. This makes TPS60402DBVT preferable for predictable EMI filtering and stable ripple frequency, while TPS60400DBVT suits wide-dynamic-range loads where ultra-low standby current is critical.
Can the TPS60402DBVT be used to generate a split-rail (±V) supply?
Yes - the TPS60402DBVT is commonly used in rail-splitter configurations: its inverted output (–VI) serves as the negative rail, while the original input (VI) or a regulated positive rail forms the positive rail. When paired with low-ESR 1-µF ceramics and proper layout, it supports bipolar op-amp supplies up to ±2.5 V at combined loads ≤60 mA, fitting within tight space budgets in portable instrumentation.
TPS60402DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin, Vin/2
- Voltage - Output (Max):
- -
- Current - Output:
- 60mA
- Frequency - Switching:
- 50kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS60402DBVT FAQ
1.How can I place an order for TPS60402DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60402DBVT 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 TPS60402DBVT reliable?
The price and inventory of TPS60402DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60402DBVT is usually 5 days.
3.What payment methods are accepted for TPS60402DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60402DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS60402DBVT?
TPS60402DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60402DBVT 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 TPS60402DBVT?
For technical support, including TPS60402DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60402DBVT requirements.
6.How does Aetrix verify that TPS60402DBVT is sourced from the original manufacturer or authorized distributors?
All TPS60402DBVT 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 TPS60402DBVT meets industry standards.
7.What is the process for return or replacement of TPS60402DBVT?
All TPS60402DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS60402DBVT, 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 TPS60402DBVT part is unused and in its original packaging.
Return procedure for TPS60402DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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