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Texas Instruments TL7660IDGKR
- Part No.:
- TL7660IDGKR
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TL7660IDGKR.pdf
- Description:
- IC REG CHARGE PUMP INV 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,778
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Product details
Overview
TL7660IDGKR 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 external noncritical capacitors, and is used in portable instrumentation requiring rail-splitting or dual-supply generation.
For engineers reviewing the TL7660IDGKR datasheet, TL7660IDGKR pinout, TL7660IDGKR application, or TL7660IDGKR equivalent, this page delivers verified functional specifications, validated thermal and electrical performance across temperature, confirmed VSSOP-8 package mapping, and real-world design constraints for low-voltage operation and latch-up prevention.
Technical Context
The TL7660IDGKR 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 anti-latchup logic that dynamically biases switch substrates based on VOUT sensing. Its charge-pump architecture enables both inverting (–VCC) and doubling (+2VCC – 2VF) configurations without external diodes.
Operation below 3.5 V requires LV tied to GND to bypass the internal series regulator; above 3.5 V, LV must float to prevent latch-up. Oscillator frequency is adjustable via external capacitor on OSC pin or overdriven by external clock (with 1-kΩ series resistor), enabling ripple/noise optimization across load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5 V to 10 V - supports single-cell Li-ion, 3.3 V/5 V logic rails, and industrial 9–10 V supplies without external regulation. |
| Output Voltage | –1.5 V to –10 V (inverting mode) - matches input magnitude with polarity inversion; no external feedback required. |
| Oscillator Frequency | 10 kHz nominal (VCC = 5 V) - sets charge-pump switching rate; adjustable down to ~1 kHz or up via external clock for EMI/ripple trade-offs. |
| Power Efficiency | 98% typical (RL = 5 kΩ) - minimizes heat rise in space-constrained portable designs; derates linearly above 50°C. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and extended-range sensor nodes. |
| Output Source Resistance | 135 Ω max (–40°C to +125°C, IO = 20 mA) - defines worst-case load regulation and output impedance for analog front-end biasing. |
| Voltage Conversion Efficiency | 99% min (open-circuit, –40°C to +125°C) - ensures near-ideal charge transfer for ultra-low-power data-acquisition systems. |
Pinout & Package
VSSOP-8 (DGK) package: 3.0 mm × 3.0 mm body, 0.5 mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pad; must remain unconnected to avoid parasitic coupling or mechanical stress on bond wires. |
| 2 (CAP+) | Charge-pump capacitor positive terminal | Connects to positive terminal of pump capacitor C1; polarity critical when using polarized electrolytics. |
| 3 (GND) | Analog/digital ground reference | Common return for VCC, VOUT, and external capacitors; requires low-impedance PCB plane for stability. |
| 4 (CAP−) | Charge-pump capacitor negative terminal | Connects to negative terminal of pump capacitor C1; forms flying capacitor node with CAP+ during switching cycles. |
| 5 (VOUT) | Negative output voltage terminal | Delivers inverted supply; must not exceed GND potential - reverse-biased diode recommended to prevent latch-up. |
| 6 (OSC) | Oscillator timing/control terminal | Accepts external capacitor to lower frequency or TTL/CMOS clock (via 1-kΩ series resistor) to raise it; stray capacitance ≤10 pF affects accuracy. |
| 7 (LV) | Low-voltage mode enable | Tie to GND for VCC < 3.5 V to bypass internal regulator; leave floating for VCC > 3.5 V to maintain latch-up immunity. |
| 8 (VCC) | Positive input supply | Primary power input; source impedance >25 Ω may require 2.2 µF decoupling to limit dV/dt and prevent start-up faults. |
Key Features
| Feature | Design Value |
|---|---|
| No external diodes required | Eliminates forward-voltage drop and thermal derating issues across full temperature/voltage range, simplifying BOM and layout. |
| Auto-adjusting substrate bias | Prevents N-channel switch latch-up by dynamically tracking VOUT and adjusting substrate potentials - enables robust operation under short-circuit or startup transients. |
| Configurable oscillator | Supports frequency tuning from ~1 kHz to >100 kHz via external capacitor or clock, allowing ripple/noise/efficiency optimization per application. |
| Two-capacitor topology | Enables full functionality with only C1 (pump) and C2 (reservoir); 10 µF polarized electrolytics are sufficient for most 20 mA loads. |
| Wide input voltage range | Operates from 1.5 V (single alkaline cell) to 10 V (industrial bus), reducing need for pre-regulation in battery-powered or multi-rail systems. |
Applications
| Portable Medical Sensors | Rail-Splitting for Op-Amp Bias |
|---|---|
|
Use Scenario: Battery-powered ECG front-end requiring ±2.5 V supplies from a 5 V rail. IC Role / Device Role / Timing Role: Generates stable –5 V output to establish symmetric analog supply for instrumentation amplifiers and ADC drivers. Use Value: Enables true bipolar signal acquisition without transformer-based isolation or discrete charge-pump ICs, reducing board area by >40%. |
Use Scenario: Low-noise audio preamplifier needing dual ±3.3 V rails from a single 3.3 V source. IC Role / Device Role / Timing Role: Inverts 3.3 V input to –3.3 V while maintaining tight regulation under dynamic load (1–10 mA). Use Value: Delivers <15 mV ripple at 10 mA load with 10 µF/low-ESR capacitors, meeting THD+N <0.002% requirements. |
| Industrial Data Acquisition | Automotive Sensor Signal Conditioning |
|
Use Scenario: 16-bit SAR ADC module operating in –40°C to +125°C environment with 10 V analog input range. IC Role / Device Role / Timing Role: Supplies –10 V reference rail for precision level-shifting and offset calibration circuitry. Use Value: Maintains 99% voltage conversion efficiency at +125°C, ensuring stable reference voltage despite thermal drift of external components. |
Use Scenario: Tire pressure monitoring system (TPMS) ECU requiring isolated analog bias for MEMS pressure sensor interface. IC Role / Device Role / Timing Role: Generates –3.0 V supply from vehicle's 3.3 V LDO to bias sensor bridge and amplifier stages. Use Value: Survives cold-crank (4.5 V) and load-dump (18 V transient) conditions due to 10.5 V absolute max rating and latch-up immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CSA+ | Fixed 10 kHz oscillator; no LV pin; 1.5 V to 6 V input; –40°C to +85°C rating. | Limited to commercial temperature range; lacks low-voltage bypass mode and external frequency control. | Select when cost sensitivity outweighs extended temp range and configurability needs. |
| ICL7660SIPAZ | Same core architecture; PDIP-8 package; 1.5 V to 12 V input; –40°C to +85°C; higher quiescent current (120 µA typ). | Through-hole assembly only; wider supply range but lower efficiency at light loads. | Choose for legacy through-hole designs or where 12 V input headroom is essential. |
Compared with MAX1044CSA+ and ICL7660SIPAZ, TL7660IDGKR offers superior high-temperature operation (125°C), active latch-up prevention via LV control, and oscillator flexibility - making it optimal for automotive and industrial edge-sensing nodes where reliability and configurability are critical.
Availability
TL7660IDGKR is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, automotive sensor interfaces, and rail-splitting circuits requiring stable component supply across extended temperature ranges.
Supply support for TL7660IDGKR 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 focused on analog and embedded processing technologies, with decades of expertise in power management and precision analog ICs.
The TL7660 product line was designed specifically for compact, low-component-count DC-DC voltage inversion in space- and power-constrained systems - targeting portable instrumentation, sensor signal chains, and dual-supply analog subsystems.
FAQ
What is the maximum allowable supply voltage for TL7660IDGKR?
The absolute maximum supply voltage for TL7660IDGKR is 10.5 V. Exceeding this value risks permanent damage. The recommended operating range is 1.5 V to 10 V. At VCC = 10 V, the device delivers –10 V output in inverting mode, and the internal protection circuitry remains fully functional across –40°C to +125°C.
How does the LV pin affect TL7660IDGKR operation below 3.5 V?
For VCC < 3.5 V, the LV pin must be tied to GND to disable the internal series regulator - this reduces dropout and improves efficiency at low input voltages. Leaving LV floating under these conditions causes excessive power loss and possible malfunction. TL7660IDGKR's LV control is mandatory for reliable sub-3.5 V operation.
Can TL7660IDGKR be used as a voltage doubler, and what are the limitations?
Yes, TL7660IDGKR can be configured as a voltage doubler generating up to +18.6 V from a 10 V input, using external diodes D1/D2 and capacitors C1/C2. However, output voltage is reduced by twice the diode forward voltage (2VF), and efficiency drops compared to inverting mode due to added conduction losses and ESR effects.
What is the purpose of the NC pin (Pin 1) on TL7660IDGKR?
Pin 1 of TL7660IDGKR is a no-connect terminal with no internal bonding. It must remain unconnected on the PCB to avoid unintended coupling, mechanical stress on die attach, or contamination-related leakage paths. TI specifies no routing, solder mask opening, or thermal relief on this pad in VSSOP-8 layout guidelines.
How does temperature affect TL7660IDGKR's output source resistance?
TL7660IDGKR's output source resistance increases with temperature: 120 Ω typical at 25°C (IO = 20 mA), rising to 135 Ω maximum across –40°C to +125°C. This variation directly impacts load regulation error - e.g., a 20 mA load produces up to 2.7 V drop at max ROUT, requiring careful headroom planning in precision analog designs.
TL7660IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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):
- 1.5V
- 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:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
TL7660IDGKR FAQ
1.How can I place an order for TL7660IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7660IDGKR 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 TL7660IDGKR reliable?
The price and inventory of TL7660IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7660IDGKR is usually 5 days.
3.What payment methods are accepted for TL7660IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7660IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7660IDGKR?
TL7660IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7660IDGKR 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 TL7660IDGKR?
For technical support, including TL7660IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7660IDGKR requirements.
6.How does Aetrix verify that TL7660IDGKR is sourced from the original manufacturer or authorized distributors?
All TL7660IDGKR 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 TL7660IDGKR meets industry standards.
7.What is the process for return or replacement of TL7660IDGKR?
All TL7660IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with TL7660IDGKR, 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 TL7660IDGKR part is unused and in its original packaging.
Return procedure for TL7660IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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