LTC1550LCS8-2.5#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The LTC1550LCS8-2.5#PBF is a low-noise switched-capacitor voltage inverter from Analog Devices that generates a stable -2.5 V output from a 2.7 V to 5.25 V positive input supply. Housed in an 8-pin SOIC package, it requires only small external capacitors and is designed for dual-supply op-amp, ADC reference, and LCD bias applications where a negative rail is needed without an inductor.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LTC1550LCS8-2.5#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.8500(MOQ 19)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Generates -2.5 V output from a 2.7 V to 5.25 V input using switched-capacitor inversion without an inductor
- Low output noise suitable for powering precision op-amp negative supply rails and ADC reference circuits
- Compact 8-pin SOIC (S8) package requiring only two small external fly capacitors
- Input voltage range of 2.7 V to 5.25 V covers 3.3 V and 5 V system supply buses
- #PBF suffix confirms lead-free RoHS-compliant packaging for modern assembly processes
Applications
The LTC1550LCS8-2.5#PBF is well suited for generating the negative supply rail needed by dual-supply operational amplifiers, instrumentation amplifiers, and precision ADCs in single-supply systems powered from a 3.3 V or 5 V bus. Portable test equipment, medical sensing modules, and industrial sensor conditioning boards use it to derive a clean -2.5 V bias from the system's positive supply without routing an inductor-based inverter that could inject switching noise. LCD bias generation and EEPROM negative programming voltage are additional applications where its low-noise switched-capacitor output is advantageous.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1610 (S8) |
| YTEOL | 10 |
| Analog IC - Other Type | SWITCHED CAPACITOR REGULATOR |
| Input Voltage-Max | 5.25V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 5V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | -2.562 V |
| Output Voltage-Min | -2.438 V |
| Output Voltage-Nom | -2.5 V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 7mA |
| Surface Mount | YES |
| Switcher Configuration | DOUBLER INVERTER |
| Switching Frequency-Max | 900kHz |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| 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 | 8542.39.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage does the LTC1550LCS8-2.5#PBF provide, and from which input rail can it operate?
The LTC1550LCS8-2.5#PBF generates a fixed -2.5 V output from an input supply ranging from 2.7 V to 5.25 V. This allows it to derive the negative rail directly from a 3.3 V or 5 V single-supply system bus, avoiding the need for a separate transformer or inverting inductor-based converter.
Why is a switched-capacitor inverter preferred over an inductor-based inverter for powering a precision op-amp negative supply?
Inductor-based inverters generate switching noise that can couple into sensitive analog circuits, degrading ADC accuracy or amplifier offset. The LTC1550LCS8-2.5#PBF uses switched capacitors to invert voltage, producing lower broadband noise on the output rail and eliminating the EMI concerns associated with magnetic components, which is important in precision signal-chain designs requiring microvolt-level accuracy.
What external components does the LTC1550LCS8-2.5#PBF require for a complete negative rail solution?
The LTC1550LCS8-2.5#PBF requires only two small external capacitors: one fly capacitor across its charge-transfer pins (typically 1 µF to 10 µF) and one output filter capacitor. No inductor is needed. This results in a minimal BOM and a compact PCB footprint, making it practical for space-constrained portable and handheld designs.
Does the LTC1550LCS8-2.5#PBF carry RoHS-compliant packaging, and what does the #PBF suffix indicate?
Yes. The #PBF suffix stands for Lead (Pb) Free, indicating the device is packaged with lead-free solder-compatible finishes in compliance with RoHS directives. However, the raw JESD-609 code listed is e3, so designers should confirm the exact RoHS tier with the distributor certificate of conformance when procuring for regulated markets.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| 19+ | $3.7800 | $71.82 |
| 100+ | $3.6121 | $361.21 |
| 500+ | $3.1000 | $1550.00 |
| 1000+ | $2.8500 | $2850.00 |
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