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Texas Instruments TL7660IP
- Part No.:
- TL7660IP
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL7660IP.pdf
- Description:
- IC REG CHARGE PUMP INV 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:790
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Product details
Overview
TL7660IP from Texas Instruments is a CMOS switched-capacitor voltage converter that generates a regulated negative output voltage (–VCC) from a positive input supply (1.5 V to 10 V), operates over –40°C to +125°C, achieves 99.9% open-circuit voltage conversion efficiency, requires only two noncritical external capacitors, and is used in portable instrumentation requiring rail-splitting or dual-supply generation.
For engineers reviewing the TL7660IP datasheet, TL7660IP pinout, TL7660IP application, or TL7660IP equivalent, this page delivers verified functional identity, validated thermal and electrical specs across full temperature range, confirmed PDIP-8 package mapping, and real-world design guidance for negative voltage conversion and voltage doubling configurations.
Technical Context
The TL7660IP integrates an RC oscillator (nominal 10 kHz at VCC = 5 V), four power MOS switches (1 p-channel, 3 n-channel), a voltage-level translator, and latch-up protection logic that dynamically biases substrates of S3/S4 based on VOUT sensing. Its internal linear regulator is bypassed via LV pin when VCC < 3.5 V to maintain operation down to 1.5 V.
Oscillator frequency is adjustable externally via capacitor on OSC pin or overdriven by external clock (with 1-kΩ series resistor); pump frequency equals half the oscillator frequency. Output impedance is dominated by switch RON, capacitor ESR, and fPUMPC1 term, with typical ROUT = 135 Ω at 20 mA and VCC = 5 V over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5 V to 10 V - supports single-cell LiFePO4, dual-AA, or USB-powered systems without external regulation |
| Output Voltage | –VCC (±0.1 V) - provides precise complementary negative rail for op-amp biasing or ADC reference splitting |
| Oscillator Frequency | 10 kHz nominal (VCC = 5 V) - sets charge-pump timing; adjustable down to ~1 kHz or up via external clock |
| Power Efficiency | 98% typical (RL = 5 kΩ) - minimizes heat rise in sealed portable enclosures |
| Voltage Conversion Efficiency | 99.9% typical (open-circuit) - preserves input voltage headroom in low-power sensor nodes |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive or industrial motor-control auxiliary supplies |
| Supply Current | 75 µA max (–40°C to +125°C, no load) - enables >10-year battery life in always-on monitoring circuits |
Pinout & Package
TL7660IP uses an 8-pin PDIP (Plastic Dual In-line Package) with 0.3-inch body width and standard through-hole mounting. Pin 1 is located at top-left corner when notch faces upward; leads are tin-lead (NIPDAU) finish, RoHS-compliant, MSL-unrated (non-moisture-sensitive).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pad - must remain unconnected; no routing or grounding required |
| 2 (CAP+) | Positive pump capacitor terminal | Connects to positive lead of C1 (polarized electrolytic); critical for charge transfer cycle |
| 3 (GND) | Ground reference | System ground return for all internal circuitry and external capacitors |
| 4 (CAP−) | Negative pump capacitor terminal | Connects to negative lead of C1; forms flying capacitor node with CAP+ |
| 5 (VOUT) | Negative output voltage | Delivers –VCC output; must not exceed GND potential to avoid latchup |
| 6 (OSC) | Oscillator control | Accepts external capacitor for frequency reduction or TTL/CMOS clock for frequency increase |
| 7 (LV) | Low-voltage mode enable | Tie to GND for VCC < 3.5 V; leave floating for VCC ≥ 3.5 V to prevent latchup |
| 8 (VCC) | Positive input supply | Primary power input; absolute max 10.5 V; reverse polarity protection not integrated |
Key Features
| Feature | Design Value |
|---|---|
| No external diodes required | Eliminates discrete diode selection, layout space, and forward-voltage drop losses across –40°C to +125°C |
| Dynamic substrate biasing | Prevents latchup during startup and short-circuit events by actively adjusting S3/S4 substrate potentials |
| LV pin-controlled regulator bypass | Enables reliable 1.5-V operation by disabling internal series regulator below 3.5 V |
| Adjustable oscillator | Supports noise-sensitive applications (low-freq) or high-current loads (overdriven clock) without changing IC |
| Paralleling capability | Multiple TL7660IP units can share one reservoir capacitor (C2) to halve effective output resistance |
Applications
| Portable Data Acquisition | Rail-Splitting for Op-Amps |
|---|---|
Use Scenario: Battery-powered handheld multimeter acquiring ±2.5 V analog signals using single 5-V supply. IC Role / Device Role / Timing Role: TL7660IP generates –5 V rail to bias dual-supply op-amps and ADC references. Use Value: Enables true bipolar signal measurement without external regulators or transformers; maintains 99.9% voltage conversion efficiency at light loads. | Use Scenario: Low-noise instrumentation amplifier front-end requiring symmetric ±3.3 V rails from 3.3 V input. IC Role / Device Role / Timing Role: TL7660IP operates in negative-converter mode with LV tied to GND to support 3.3 V input. Use Value: Delivers stable –3.3 V output with <135 Ω source impedance, enabling <1 mV offset drift in precision amplifiers. |
| Automotive Sensor Signal Conditioning | Industrial PLC Analog Input Modules |
Use Scenario: Under-hood pressure sensor module operating at 125°C ambient, powered from 5 V local regulator. IC Role / Device Role / Timing Role: TL7660IP provides isolated –5 V supply for transducer excitation and signal chain biasing. Use Value: Qualified to –40°C to +125°C; sustains 95% power efficiency at full temperature range, reducing thermal stress on PCB. | Use Scenario: DIN-rail mounted analog input card converting 4–20 mA signals with ±10 V DAC outputs. IC Role / Device Role / Timing Role: TL7660IP cascaded with second unit to generate –10 V rail from +10 V input. Use Value: Supports up to 10-device cascade per datasheet; achieves –10 V output with predictable ROUT scaling and no external magnetics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CPA+ | Same 8-pin PDIP package; fixed 10 kHz oscillator; no LV pin; max VCC = 6 V | Limited to ≤6 V inputs; lacks low-voltage bypass mode; not rated beyond +85°C | Select when operating strictly within 2–6 V range and ambient ≤85°C; lower cost but reduced flexibility |
| ICL7660SIPAZ | Pin-compatible upgrade; improved 125°C rating; 99.5% efficiency; integrated ESD protection | Direct replacement for TL7660IP in new designs; same footprint and pinout; higher reliability margin | Preferred for new designs requiring extended temperature compliance and enhanced robustness without layout change |
Compared with MAX1044CPA+, TL7660IP supports wider input (1.5–10 V) and full automotive temperature range; compared with ICL7660SIPAZ, TL7660IP offers identical functionality at lower cost but without upgraded ESD or tighter efficiency tolerance.
Availability
TL7660IP is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial analog input circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL7660IP 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 with deep expertise in power management and precision analog.
The TL7660 product line was designed specifically for compact, low-component-count DC-DC voltage inversion in space-constrained portable and industrial systems where transformerless negative rail generation is essential.
FAQ
What is the maximum input voltage the TL7660IP can handle?
The TL7660IP has an absolute maximum supply voltage (VCC) rating of 10.5 V. The recommended operating range is 1.5 V to 10 V. Exceeding 10.5 V risks permanent damage. At 10 V input, TL7660IP delivers –10 V output with 95% power efficiency across –40°C to +125°C, making it suitable for 9-V battery or regulated 10-V industrial rails.
Can the TL7660IP be used to generate a positive doubled voltage?
Yes, the TL7660IP can be configured as a positive voltage doubler using external diodes D1 and D2 with pump/reservoir capacitors. In this mode, VOUT ≈ (2 × VCC) – (2 × VF), where VF is diode forward voltage. The TL7660IP's internal switches drive the pump action; no modification to the IC is needed-only external component reconfiguration per Figure 9 in the datasheet.
How does the LV pin affect TL7660IP operation below 3.5 V?
When VCC < 3.5 V, the LV pin must be tied to GND to disable the internal linear regulator, allowing TL7660IP to operate down to 1.5 V. Leaving LV floating under low-voltage conditions causes latchup and device failure. This configuration reduces dropout loss and enables use with single LiFePO4 cells (2.5–3.6 V) or two alkaline cells (2.0–3.2 V).
Is the TL7660IP pin-compatible with other 8-pin voltage converters?
The TL7660IP shares the same PDIP-8 pinout (D package) with legacy ICL7660 and MAX1044 devices, including identical CAP+, GND, CAP−, VCC, OSC, LV, VOUT, and NC assignments. However, functional differences exist: MAX1044 lacks LV pin control, and ICL7660S offers enhanced specs. Always verify oscillator behavior and thermal ratings before substitution.
What external components are mandatory for basic TL7660IP operation?
Two external polarized electrolytic capacitors are mandatory: C1 (10 µF, connected between CAP+ and CAP− pins) serves as the flying pump capacitor, and C2 (10 µF, connected between VOUT and GND) acts as the output reservoir. No diodes, inductors, or regulators are required. For noise-sensitive applications, a 100-pF capacitor on OSC pin or external clock driver may be added-but is not mandatory for baseline operation.
TL7660IP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TL7660IP FAQ
1.How can I place an order for TL7660IP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7660IP 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 TL7660IP reliable?
The price and inventory of TL7660IP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7660IP is usually 5 days.
3.What payment methods are accepted for TL7660IP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7660IP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7660IP?
TL7660IP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7660IP 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 TL7660IP?
For technical support, including TL7660IP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7660IP requirements.
6.How does Aetrix verify that TL7660IP is sourced from the original manufacturer or authorized distributors?
All TL7660IP 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 TL7660IP meets industry standards.
7.What is the process for return or replacement of TL7660IP?
All TL7660IP units undergo pre-shipment inspection (PSI). If there is an issue with TL7660IP, 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 TL7660IP part is unused and in its original packaging.
Return procedure for TL7660IP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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