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Texas Instruments TPS60402DBVR
- Part No.:
- TPS60402DBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS60402DBVR.pdf
- Description:
- IC REG CHG PUMP INV 60MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,102
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Product details
Overview
TPS60402DBVR 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 bipolar amplifier supply and LCD bias generation.
For engineers reviewing the TPS60402DBVR datasheet, TPS60402DBVR pinout, TPS60402DBVR application, or TPS60402DBVR equivalent, this page provides verified functional identity, confirmed SOT-23-5 pin mapping, real-world load behavior (VO = –VI – IO × RO), and validated alternatives for unregulated negative rail generation in space-constrained battery-powered systems.
Technical Context
The TPS60402DBVR implements a two-phase switched-capacitor topology: during phase one, the flying capacitor (CFLY) charges to VI; during phase two, it connects inverted across CO to generate VO ≈ –VI. Its fixed 50-kHz oscillator drives internal MOSFET switches with typical on-resistance contributing to a 15-Ω output impedance at 25°C and 5 V input.
No regulation loop or feedback path exists - output voltage droops linearly with load per VO = –(VI – RO × IO). Startup includes integrated active Schottky-diode circuitry to clamp positive transients on OUT during initial power-up into capacitive or current-sink loads, 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, or regulated 3.3 V/5 V rails. |
| Output Current | 60 mA maximum - defines usable load capacity before >10% VO droop at room temperature. |
| Switching Frequency | 50 kHz (fixed) - determines capacitor sizing (3.3 µF CFLY/CO recommended) and ripple frequency. |
| Quiescent Current | 120 µA typical (no load, 5 V) - sets light-load efficiency floor and battery runtime impact. |
| Output Resistance | 15 Ω typical (25°C, 5 V) - directly causes VO droop: e.g., –4.1 V at 60 mA from 5 V input. |
| Capacitor Count | 3 external 1-µF ceramics - minimal BOM for full inverter function; no inductors or regulators required. |
| Efficiency | >90% typical at 30–60 mA (5 V input) - dominated by switch losses and capacitor ESR at mid-to-high loads. |
Pinout & Package
TPS60402DBVR is housed in a 5-pin SOT-23 package (2.90 mm × 1.60 mm body), optimized for high-density portable PCB layouts. Thermal resistance RθJA is 221.2°C/W; board-level thermal performance depends on copper area under the exposed pad (GND pin 4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Power output | Delivers inverted negative voltage (VO ≈ –VI); must be bypassed to GND with CO (≥1 µF ceramic). |
| IN (Pin 2) | Supply input | Accepts 1.6–5.5 V; requires local bypass (CI = C(fly)) to suppress switching noise injection into source rail. |
| CFLY– (Pin 3) | Flying capacitor negative terminal | Connects to negative side of C(fly); node swings between GND and –VI during switching phases. |
| GND (Pin 4) | Ground reference | Common return for IN, OUT, and CFLY+; serves as thermal pad; must connect to large PCB copper pour. |
| CFLY+ (Pin 5) | Flying capacitor positive terminal | Connects to positive side of C(fly); node swings between VI and GND during switching phases. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated active Schottky-diode startup | Prevents positive voltage excursion on OUT during power-up into capacitive or sink-type loads - eliminates external diode and saves 1 mm² board area. |
| Fixed 50-kHz oscillator | Enables predictable EMI profile and stable capacitor sizing (3.3 µF CFLY/CO) without frequency variation across temperature or load. |
| Ultra-low external component count | Only three 1-µF ceramic capacitors required - reduces BOM cost, assembly steps, and failure points versus inductor-based inverters. |
| Wide input range (1.6–5.5 V) | Supports direct battery connection across chemistries (Li-ion, alkaline, NiMH) without pre-regulation - extends usable battery voltage window. |
| SOT-23-5 footprint | Enables <50 mm² total solution size - suitable for hearing aids, wearables, and handheld medical sensors where board space is constrained. |
Applications
| LCD Bias Supply | GaAs RF Power Amplifier Bias |
|---|---|
|
Use Scenario: Generating negative gate bias for STN/TN LCD panels in handheld meters and industrial HMIs. IC Role / Device Role / Timing Role: Unregulated voltage inverter providing –3 V to –5 V rail from 3.3 V system supply. Use Value: Eliminates need for discrete charge-pump IC + external diodes; achieves <50 mV ripple with 3.3 µF CO at 50 kHz. |
Use Scenario: Supplying negative drain/gate bias to GaAs FETs in portable RF front-ends (e.g., IoT transceivers). IC Role / Device Role / Timing Role: Compact DC-DC inverter delivering –2.5 V to –4 V at ≤25 mA from single-cell battery. Use Value: Enables true single-supply RF stage design; 50-kHz fixed frequency simplifies EMI filtering vs variable-frequency alternatives. |
| Sensor Signal Conditioning | Bipolar Op-Amp Supply |
|
Use Scenario: Powering precision analog front-ends (e.g., bridge sensor amplifiers) in portable gas detectors and pH meters. IC Role / Device Role / Timing Role: Negative rail generator for rail-to-rail op-amps requiring symmetric ±2.5 V supplies from 5 V MCU rail. Use Value: Delivers stable –2.5 V at 10 mA with <15 mV p-p ripple; integrated startup diode prevents sensor offset drift during power-on. |
Use Scenario: Creating split supplies for low-noise audio op-amps or instrumentation amplifiers in battery-powered medical devices. IC Role / Device Role / Timing Role: Charge-pump inverter paired with RC post-filter to reduce ripple below 5 mV for <1 µV/°C drift-critical circuits. Use Value: Achieves bipolar ±2.5 V from 5 V input using only 5 mm × 5 mm board area - no inductors or LDOs needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unregulated charge-pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | Fixed 250-kHz switching frequency; higher quiescent current (425 µA typ); uses 1-µF CFLY/CO. | Better ripple suppression at light loads due to higher frequency; less suitable for ultra-low-IQ battery systems. | Select when lower output ripple (<15 mV p-p) is prioritized over standby current; requires tighter layout for 250-kHz EMI control. |
| TPS60401DBVR | Fixed 20-kHz switching frequency; uses 10-µF CFLY/CO; lower quiescent current (65 µA typ). | Higher output impedance (~15 Ω still) but better low-frequency PSRR; suited for high-current, low-ripple-tolerance apps. | Select when driving heavier loads (>40 mA) with relaxed ripple specs and longer battery life is critical; larger capacitors increase board area. |
Compared with TPS60402DBVR, TPS60403DBVR trades higher IQ for lower ripple via 250-kHz operation, while TPS60401DBVR sacrifices frequency agility for lowest quiescent draw at 20 kHz - all three share identical pinout, package, and core inverter architecture.
Availability
TPS60402DBVR is available at Aetrix Electronics and suitable for LCD bias, GaAs RF amplifier bias, and portable sensor supply applications requiring stable component supply, consistent parametric performance across production lots, and long-term industrial lifecycle support.
Supply support for TPS60402DBVR 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 and precision power solutions.
The TPS6040x family was designed specifically for compact, low-component-count negative rail generation in battery-powered instrumentation, medical devices, and portable RF systems - emphasizing simplicity, reliability, and minimal board area.
FAQ
What is the exact output voltage behavior of the TPS60402DBVR under load?
The TPS60402DBVR delivers an unregulated negative output: VO ≈ –VI at no load, but droops linearly with current per VO = –(VI – RO × IO), where RO is ~15 Ω at 25°C. For example, with 5 V input and 60 mA load, VO is approximately –4.1 V. This behavior is inherent to charge-pump topology and confirmed in Section 7.5 of the SLVS324C datasheet for TPS60402DBVR.
Does the TPS60402DBVR require an external Schottky diode for startup?
No - the TPS60402DBVR integrates active Schottky-diode circuitry to clamp positive voltage excursions on the OUT pin during power-up into capacitive or current-sink loads. This eliminates the need for an external diode, saving board space and reducing BOM count, as explicitly stated in the "Features" and "Detailed Description" sections of the official TPS60402DBVR datasheet.
What capacitor values are mandatory for stable operation of the TPS60402DBVR?
The TPS60402DBVR requires three 3.3-µF ceramic capacitors: one each for CI (input bypass), CFLY (flying), and CO (output filter), as specified in Table 9-1 of the datasheet. Using 1-µF capacitors is possible but degrades output resistance and increases ripple; 3.3 µF is the manufacturer-recommended value to achieve rated 60 mA performance and <20 mV p-p ripple at 50 kHz.
Can the TPS60402DBVR be used in a rail-splitter configuration?
Yes - the TPS60402DBVR can generate a negative rail from a positive supply to create a bipolar ±V system. When paired with a resistor-capacitor (RC) post-filter (e.g., 50 Ω + 0.1 µF), it achieves low-noise split supplies for op-amps in portable medical instruments, as demonstrated in Figure 9-4 of the TPS60402DBVR datasheet.
How does the TPS60402DBVR's 50-kHz fixed frequency impact EMI design?
The fixed 50-kHz switching frequency of the TPS60402DBVR enables predictable EMI filtering - unlike variable-frequency charge pumps, its fundamental and harmonic content remains stable across temperature and load. This simplifies compliance testing and allows targeted LC filtering, especially important in sensitive analog or RF subsystems sharing the same PCB as the TPS60402DBVR.
TPS60402DBVR 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
TPS60402DBVR FAQ
1.How can I place an order for TPS60402DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60402DBVR 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 TPS60402DBVR reliable?
The price and inventory of TPS60402DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60402DBVR is usually 5 days.
3.What payment methods are accepted for TPS60402DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60402DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS60402DBVR?
TPS60402DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60402DBVR 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 TPS60402DBVR?
For technical support, including TPS60402DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60402DBVR requirements.
6.How does Aetrix verify that TPS60402DBVR is sourced from the original manufacturer or authorized distributors?
All TPS60402DBVR 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 TPS60402DBVR meets industry standards.
7.What is the process for return or replacement of TPS60402DBVR?
All TPS60402DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS60402DBVR, 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 TPS60402DBVR part is unused and in its original packaging.
Return procedure for TPS60402DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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