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Analog Devices Inc. LTC1044AIS8#TRPBF
- Part No.:
- LTC1044AIS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1044AIS8#TRPBF.pdf
- Description:
- IC REG CHARGE PUMP INV 20MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,580
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Product details
Overview
LTC1044AIS8#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic CMOS switched-capacitor voltage converter in 8-lead SOIC package, supporting 1.5V–12V input, delivering inverted (–VIN), doubled (+2VIN), halved (VIN/2), or multiplied (±nVIN) outputs without inductors. It features 97% open-circuit voltage conversion efficiency, 95% power conversion efficiency at 5kHz, and 200µA max no-load supply current at 5V - used in precision analog supply splitting and battery-powered instrumentation.
For engineers reviewing the LTC1044AIS8#TRPBF datasheet, LTC1044AIS8#TRPBF pinout, LTC1044AIS8#TRPBF application, or LTC1044AIS8#TRPBF equivalent, key selection criteria include its –40°C to +85°C industrial temperature range, BOOST pin-enabled 7× oscillator frequency scaling, 1.5µA shutdown current when OSC is tied to GND/V+, and compatibility with standard 10µF external capacitors for compact ±10V generation.
Technical Context
The LTC1044AIS8#TRPBF implements a fully integrated switched-capacitor architecture with internal MOS switches, dual-phase clocking, and programmable oscillator control via OSC (Pin 7) and BOOST (Pin 1). Its LV (Pin 6) logic rail self-biases to GND for V+ ≥ 3V, eliminating external biasing in most applications.
It supports four core conversion modes: inversion (VOUT = –VIN), doubling (VOUT = 2VIN), precise division (VOUT = VIN/2 ±20ppm), and multiplication (VOUT = ±nVIN). Output impedance is dynamically tunable via oscillator frequency - dropping from ~200Ω at 1kHz to ~60Ω at 10kHz with 10µF capacitors - enabling optimization for load regulation vs. ripple trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 12V - enables direct operation from single-cell Li-ion, 3.3V/5V rails, or 9V batteries without pre-regulation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including automotive body electronics and portable test equipment. |
| Oscillator Frequency | 1kHz to 20kHz (adjustable via COSC and BOOST pin) - higher frequencies reduce output impedance and ripple for >10mA loads. |
| Voltage Conversion Efficiency | ≥97% (open-circuit) - ensures minimal input-to-output voltage loss in low-power precision divider applications. |
| Power Conversion Efficiency | ≥95% at 5kHz, RL = 5kΩ - maintains high energy transfer in battery-fed systems where quiescent current matters. |
| No-Load Supply Current | 200µA max at 5V - allows use in always-on monitoring circuits without excessive standby drain. |
| Shutdown Current | 1.5µA at 5V when OSC = GND or V+ - enables ultra-low-power sleep mode in intermittent-sampling systems. |
Pinout & Package
Package: 8-lead plastic SOIC (S8), 150-mil width, JEDEC MS-012AC compliant, θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency multiplier control | Connecting to V+ increases internal oscillator frequency by ~7×, enabling smaller external capacitors and lower output impedance. |
| 2 (CAP+) | Positive flying capacitor terminal | Connects to one plate of C1; alternately charges/discharges to generate voltage inversion or multiplication. |
| 3 (GND) | Ground reference and output common | Serves as return path for all currents and defines 0V reference for VOUT and LV logic rail. |
| 4 (CAP–) | Negative flying capacitor terminal | Connects to second plate of C1; polarity reversal relative to CAP+ enables negative output generation. |
| 5 (VOUT) | Regulated output node | Delivers inverted (–VIN), doubled (+2VIN), or divided (VIN/2) voltage; exhibits ~80Ω typical output resistance at 10kHz. |
| 6 (LV) | Logic voltage reference input | Internally shorted to GND when V+ ≥ 3V; must be externally grounded for V+ < 3V to ensure proper internal logic biasing. |
| 7 (OSC) | Internal oscillator timing/control | Accepts external capacitor (COSC) to set base frequency; can be driven by external CMOS/TTL clock for synchronous operation. |
| 8 (V+) | Main supply input | Accepts 1.5V–12V unregulated input; absolute maximum rating is 13V - requires external overvoltage protection above 12V. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless voltage conversion | Eliminates magnetic components, EMI concerns, and PCB area overhead - ideal for space-constrained analog signal chains. |
| Precision voltage division (VIN/2) | ±20ppm accuracy enables ratiometric sensor excitation and reference splitting without trimming resistors. |
| Configurable oscillator frequency | Adjustable from 1kHz to 20kHz via COSC and BOOST pin - balances output impedance, ripple, and capacitor size. |
| Ultra-low shutdown current | 1.5µA at 5V enables microamp-level system sleep states - critical for battery life in portable instrumentation. |
| High-voltage upgrade path | Supports up to 12V input (vs. 6V for ICL7660), allowing direct replacement in legacy designs with higher supply rails. |
Applications
| Strain Gauge Signal Conditioning | Battery-Powered Precision Instrumentation |
|---|---|
Use Scenario: Single-supply 5V strain gauge bridge amplifier requiring symmetric ±2.5V excitation and reference. IC Role / Device Role / Timing Role: LTC1044AIS8#TRPBF generates precise ±2.5V from 5V rail using VIN/2 mode, referenced to GND (Pin 3). Use Value: Enables ratiometric A/D conversion with 0.002% division accuracy - eliminates need for matched resistor networks or external references. |
Use Scenario: Handheld multimeter with auto-ranging ADC needing stable ±3.3V supplies from a 9V alkaline battery. IC Role / Device Role / Timing Role: LTC1044AIS8#TRPBF operates in inversion mode (VOUT = –VIN) to create –9V, then combines with linear regulators to derive clean ±3.3V rails. Use Value: Achieves >95% power efficiency across 1–10mA loads while maintaining –40°C to +85°C operation - extends battery runtime and field reliability. |
| Automotive Body Control Module | Industrial Sensor Transmitter |
Use Scenario: CAN/LIN node with isolated RS-485 interface requiring isolated ±5V for transceiver biasing. IC Role / Device Role / Timing Role: LTC1044AIS8#TRPBF converts 12V vehicle battery to –12V, followed by LDOs to produce regulated ±5V for isolated data line drivers. Use Value: Withstands 13V absolute max rating and operates down to 1.5V - survives cold-crank and load-dump transients without latch-up. |
Use Scenario: 4–20mA loop-powered pressure transmitter needing precision 2.5V reference and negative bias for op-amp input stage. IC Role / Device Role / Timing Role: LTC1044AIS8#TRPBF delivers ultra-stable –2.5V (via VIN/2 from 5V LDO) with <20ppm drift - directly referenced to loop ground. Use Value: Maintains 0.002% division accuracy over temperature - ensures sub-0.1% total error in 16-bit measurement systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660CPA | Max input 6V, no BOOST pin, 100µA IS at 5V, only inverts - lacks VIN/2, doubling, and frequency scaling. | Restricted to low-voltage (≤6V) inversion-only use; cannot replace LTC1044AIS8#TRPBF in 9V/12V or precision division roles. | Select only if cost-sensitive, ≤6V supply, and inversion-only function suffices - verify thermal derating at 6V. |
| LTC3265EMS#PBF | Low-noise, dual-output (±VOUT), 2.7–4.5V input, 250mA output, integrated LDOs - higher integration but narrower VIN range. | Requires external LDO for >4.5V inputs; not drop-in for 9V/12V battery systems; superior PSRR for sensitive ADC references. | Choose when low-noise ±VOUT and >100mA output needed - not suitable for direct 12V-to-±12V conversion without pre-regulation. |
Compared with ICL7660CPA, LTC1044AIS8#TRPBF supports 100% higher input voltage and adds three conversion modes; versus LTC3265EMS#PBF, it trades integrated LDOs and noise performance for wider input range and simpler external component count.
Availability
LTC1044AIS8#TRPBF is available at Aetrix Electronics and suitable for industrial sensor transmitters, battery-powered instrumentation, automotive body control modules, and precision analog supply splitting requiring stable component supply across extended temperature ranges.
Supply support for LTC1044AIS8#TRPBF 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
Analog Devices acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for legacy Linear parts including the LTC1044A series.
The LTC1044A product line was designed for high-accuracy, inductorless DC/DC conversion in space- and power-constrained analog systems - targeting precision instrumentation, sensor interfaces, and portable test equipment.
FAQ
What is the absolute maximum supply voltage for the LTC1044AIS8#TRPBF?
The absolute maximum supply voltage for the LTC1044AIS8#TRPBF is 13V. Exceeding this rating may cause permanent damage. The device operates reliably up to 12V input, making it suitable for 9V battery and 12V automotive applications. Always include transient suppression (e.g., TVS diode) if interfacing with unregulated sources prone to load dump or cold-crank events.
Can the LTC1044AIS8#TRPBF generate a precise +2.5V and –2.5V split from a 5V supply?
Yes, the LTC1044AIS8#TRPBF supports ultra-precision voltage division (VOUT = VIN/2 ±20ppm) in dedicated configuration. When powered from 5V, it delivers +2.5V at V+ and –2.5V at VOUT, both referenced to GND (Pin 3), enabling true symmetrical rail generation for op-amps and ADC references without external resistors.
How does the BOOST pin (Pin 1) affect the LTC1044AIS8#TRPBF's performance?
Tying the BOOST pin (Pin 1) to V+ increases the internal oscillator frequency by approximately 7×. This reduces output impedance (e.g., from ~200Ω to ~60Ω at 10kHz) and output voltage ripple, allowing smaller external capacitors (e.g., 1µF instead of 10µF) - critical for board space savings in high-current or high-PSRR applications.
What is the shutdown current of the LTC1044AIS8#TRPBF, and how is it activated?
The LTC1044AIS8#TRPBF draws only 1.5µA supply current at 5V when the OSC pin (Pin 7) is tied to GND or V+. This ultra-low shutdown state disables the internal oscillator and switching circuitry while preserving pin functionality - ideal for intermittent-sampling systems like portable data loggers where battery life is paramount.
Is the LTC1044AIS8#TRPBF pin-compatible with the older LTC1044CN8?
Yes, the LTC1044AIS8#TRPBF is pin-compatible with the LTC1044CN8 in SOIC-8 (S8) footprint, but offers enhanced specifications: higher 12V input (vs. 6V), improved 97% voltage conversion efficiency (vs. 94%), and added BOOST pin functionality. No PCB changes are required for drop-in replacement - verify thermal design due to higher max input voltage capability.
LTC1044AIS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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):
- 12V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin, Vin/2
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 1kHz ~ 5kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC1044AIS8#TRPBF FAQ
1.How can I place an order for LTC1044AIS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1044AIS8#TRPBF 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 LTC1044AIS8#TRPBF reliable?
The price and inventory of LTC1044AIS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1044AIS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1044AIS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1044AIS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1044AIS8#TRPBF?
LTC1044AIS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1044AIS8#TRPBF 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 LTC1044AIS8#TRPBF?
For technical support, including LTC1044AIS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1044AIS8#TRPBF requirements.
6.How does Aetrix verify that LTC1044AIS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1044AIS8#TRPBF 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 LTC1044AIS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1044AIS8#TRPBF?
All LTC1044AIS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1044AIS8#TRPBF, 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 LTC1044AIS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1044AIS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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