LT1054IDWRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LT1054IDWRG4 is a switched-capacitor voltage inverter and regulator generating negative voltages up to -5V at 100mA output current from a 3.5V to 15V input supply. Packaged in a 16-pin SOIC with voltage-mode control. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LT1054IDWRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Switched-capacitor charge pump architecture generating regulated negative supply voltage without inductors, enabling compact PCB designs with minimal EMI
- 100mA maximum output current capability providing sufficient power for op-amp negative rails, bias supplies, and RS-232 charge pump applications
- Wide 3.5V to 15V input voltage range supporting operation from standard 5V, 9V, and 12V supply rails in industrial and consumer electronic systems
- Voltage-mode regulation with adjustable output voltage allowing both inverting and voltage-doubling configurations with external capacitors only
- 16-pin SOIC package providing accessible pin configuration for setting oscillator frequency, shutdown control, and feedback for regulated output adjustment
Applications
The LT1054IDWRG4 switched-capacitor charge pump is commonly used to generate the negative supply rail needed for dual-supply operational amplifier circuits in single-supply systems, eliminating the need for a separate negative power supply or transformer. It is deployed in RS-232 serial communication interfaces requiring negative voltage generation for proper line driver operation from a single 5V supply. The device also serves in sensor conditioning circuits, LCD bias generation, and ADC/DAC reference supply applications where a low-current negative voltage rail must be derived from an available positive supply.
Specifications
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHED CAPACITOR REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Input Voltage-Max | 15V |
| Input Voltage-Min | 3.5V |
| Input Voltage-Nom | 7V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 0.1A |
| Output Voltage-Max | -5.2 V |
| Output Voltage-Min | -4.7 V |
| Output Voltage-Nom | -5 V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 4.5mA |
| Surface Mount | YES |
| Switcher Configuration | DOUBLER INVERTER |
| Switching Frequency-Max | 35kHz |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LT1054IDWRG4:
Switched Capacitor Regulator, Voltage-mode, 0.1A, 100kHz Switching Freq-Max, BIPolar, PDSO16
Switched Capacitor Regulator, Voltage-mode, 0.1A, 100kHz Switching Freq-Max, BIPolar, PDSO16
Switched Capacitor Regulator, Voltage-mode, 0.1A, 100kHz Switching Freq-Max, BIPolar, PDIP8
Frequently Asked Questions
What type of circuit is the LT1054IDWRG4 and how does it generate a negative voltage?
The LT1054IDWRG4 is a switched-capacitor voltage inverter that uses charge pump topology to generate a negative output voltage from a positive input supply. It operates by alternately charging a flying capacitor from the positive input supply and then connecting it in reverse to transfer charge to the output capacitor, building up a negative voltage rail. No inductors are required, which simplifies PCB layout and reduces electromagnetic interference compared to inductive boost or inverting converter topologies.
What is the maximum output current of the LT1054IDWRG4?
The LT1054IDWRG4 can deliver a maximum output current of 100mA (0.1A) at its negative voltage output. This level of current is adequate for powering operational amplifier negative supply rails, RS-232 line driver circuits, and low-power analog circuits requiring a negative bias. Higher current loads would require a different charge pump or switching regulator topology capable of delivering more output power.
What is the input voltage range of the LT1054IDWRG4?
The LT1054IDWRG4 accepts input voltages from 3.5V minimum to 15V maximum, with a nominal operating voltage of 7V. This range makes it compatible with common supply rails including 5V USB and logic supplies, 9V alkaline battery packs, and 12V industrial bus voltages. The wide input range provides design flexibility for use in diverse power supply environments without requiring a regulated intermediate supply voltage.
What package does the LT1054IDWRG4 use and is it RoHS compliant?
The LT1054IDWRG4 is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, identified by the JESD-30 code R-PDSO-G16, with a standard 1.27mm pin pitch and 7.5mm body width. The G4 suffix designates the RoHS-compliant lead-free version of the device, meeting EU RoHS directive requirements. However, the YTEOL (Years To End Of Life) value of 0 suggests this part may be approaching or at end-of-life status, so designers should verify current availability.
Can the LT1054IDWRG4 be configured as a voltage doubler instead of an inverter?
Yes, the LT1054IDWRG4 can be configured as either a voltage inverter or a voltage doubler depending on the external capacitor and pin connections. In voltage-doubler mode, the output voltage is approximately twice the input voltage (minus losses), which is useful for generating higher supply voltages from a lower rail in applications such as EEPROM programming voltage generation, LCD contrast voltage boosting, and RF circuit bias supply generation from a 3.3V or 5V regulated input.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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