My Inquiry
My Account
Analog Devices Inc. LTC1044AIN8#PBF
- Part No.:
- LTC1044AIN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1044AIN8#PBF.pdf
- Description:
- IC REG CHARG PUMP INV 20MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:136
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1044AIN8#PBF from Analog Devices (formerly Linear Technology) is a monolithic CMOS switched-capacitor voltage converter in 8-lead plastic DIP package, operating from 1.5V to 12V supply, delivering ±10V output from 10V input with 97% open-circuit voltage conversion efficiency and 95% power conversion efficiency. It replaces ICL7660/LTC1044 in higher-voltage applications including battery-powered instrumentation and dual-rail analog signal conditioning.
For engineers reviewing the LTC1044AIN8#PBF datasheet, LTC1044AIN8#PBF pinout, LTC1044AIN8#PBF application, or LTC1044AIN8#PBF equivalent, key selection criteria include its –40°C to +85°C industrial temperature range, BOOST pin-enabled 7× oscillator frequency scaling, 200µA max no-load supply current at 5V, and precise VOUT = VIN/2 ±20ppm voltage division capability.
Technical Context
The LTC1044AIN8#PBF implements a four-phase switched-capacitor topology with internal MOSFET switches controlled by a self-timed oscillator. Its LV pin (Pin 6) internally shorts to GND for V+ ≥ 3V, eliminating external biasing in most applications.
Oscillator frequency is factory-set at ~5kHz (V+ = 5V, COSC = 0pF) and scalable via BOOST pin (Pin 1) connection to V+, increasing frequency ~7× to reduce output impedance and ripple under load. The OSC pin (Pin 7) supports external clocking or capacitor-based frequency tuning.
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 logic rails, and 9V battery systems without pre-regulation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including automotive body electronics and portable test equipment. |
| No-Load Supply Current | 200µA max at 5V - ensures ultra-low quiescent power in always-on battery backup circuits. |
| Voltage Conversion Efficiency | 97% min open-circuit - minimizes input-to-output voltage loss in precision voltage inversion and division. |
| Output Resistance | 100Ω typ at 5V, 5kHz - defines load regulation slope (~100mV/mA) and sets maximum usable load current before excessive droop. |
| Oscillator Frequency | 5kHz typ (V+ = 5V, BOOST = open); 35kHz typ (BOOST = V+) - higher frequency allows smaller external capacitors (e.g., 1µF instead of 10µF) for space-constrained designs. |
| Power Conversion Efficiency | 95% min at RL = 5kΩ - determines thermal rise and battery runtime in continuous-conversion applications like sensor bias supplies. |
Pinout & Package
Package: 8-lead plastic DIP (N8), 0.300-inch width, JEDEC MS-001 compliant, with θJA = 100°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOST (1) | Oscillator frequency multiplier control | Connecting to V+ increases internal clock frequency ~7×, reducing output impedance and enabling smaller external capacitors. |
| CAP+ (2) | Positive flying capacitor terminal | Connects to one plate of C1; alternately charged/discharged to transfer charge between input and output nodes. |
| GND (3) | Ground reference and LV logic return | Common return for all circuitry; LV pin (6) is internally shorted to this node when V+ ≥ 3V. |
| CAP– (4) | Negative flying capacitor terminal | Connects to one plate of C2; polarity reversal relative to CAP+ enables voltage inversion and multiplication functions. |
| VOUT (5) | Regulated output voltage node | Delivers inverted (–VIN), doubled (+2VIN), or divided (VIN/2) output depending on external capacitor configuration. |
| LV (6) | Logic supply reference for internal switches | Internally tied to GND when V+ ≥ 3V; must be externally grounded only for V+ < 3V operation. |
| OSC (7) | Oscillator timing/control interface | Accepts external clock or 0pF/100pF capacitor to set base frequency; sink/source current ≤3µA enables TTL/CMOS drive. |
| V+ (8) | Positive supply input | Primary power input (1.5–12V); absolute maximum rating is 13V; powers internal logic and switch drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless voltage conversion | Eliminates magnetic components, EMI, and layout sensitivity-ideal for compact PCBs and noise-sensitive analog sections. |
| Multiple conversion modes | Supports inversion (VOUT = –VIN), doubling (VOUT = 2VIN), precise division (VOUT = VIN/2 ±20ppm), and multiplication (VOUT = ±nVIN) with same IC and external caps. |
| BOOST pin frequency scaling | Enables 7× oscillator speedup to cut output impedance by ~85%, allowing 10× smaller flying capacitors without sacrificing regulation. |
| Ultra-low shutdown current | 1.5µA supply current when OSC pin tied to GND or V+ - extends battery life in sleep-mode systems such as portable data loggers. |
| High-voltage upgrade path | Direct replacement for ICL7660/LTC1044 with extended 12V max supply (vs. 6V/7V), supporting wider input ranges in automotive and industrial power domains. |
Applications
| Portable Instrumentation Power | Precision Sensor Biasing |
|---|---|
Use Scenario: Handheld multimeter requiring ±5V rails from a single 9V alkaline battery for ADC reference and op-amp signal conditioning. IC Role / Device Role / Timing Role: LTC1044AIN8#PBF acts as a dual-rail voltage splitter, generating symmetrical ±4.5V outputs referenced to battery mid-point. Use Value: Achieves 0.002% division accuracy (±20ppm) with no external resistors, eliminating drift and matching errors in ratiometric measurements. | Use Scenario: Strain gauge Wheatstone bridge in structural health monitoring node powered by coin cell. IC Role / Device Role / Timing Role: LTC1044AIN8#PBF provides low-noise –1.2V bias for bridge excitation while maintaining <100nA load current to preserve battery life. Use Value: Delivers stable negative reference with 95% power efficiency at 1mA load, extending operational lifetime beyond 5 years on CR2032. |
| Automotive Body Control | Industrial Analog I/O Module |
Use Scenario: LIN bus transceiver module in door control unit needing isolated –5V rail from 12V vehicle battery. IC Role / Device Role / Timing Role: LTC1044AIN8#PBF operates as a robust inverting converter with built-in 13V absolute max rating, surviving load-dump transients up to 12.5V. Use Value: Withstands –40°C to +85°C ambient and delivers 97% voltage conversion efficiency, minimizing heat buildup in sealed enclosures. | Use Scenario: 4–20mA transmitter using 24V loop supply, requiring isolated ±12V for op-amp front-end and DAC reference. IC Role / Device Role / Timing Role: LTC1044AIN8#PBF configured as voltage doubler generates +24V rail; second device inverts to –24V for bipolar op-amp stages. Use Value: Enables full-scale 20mA output swing with <0.02% load regulation (0–15mA), meeting IEC 61000-4-5 surge immunity requirements. |
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 |
|---|---|---|---|
| MAX1044CPA+ | Same pinout, 1.5–6V supply range (vs. 1.5–12V), 100µA max IS at 5V, no BOOST pin | Limited to low-voltage systems; cannot replace LTC1044AIN8#PBF in 9V/12V battery or automotive applications | Select MAX1044CPA+ only for cost-sensitive 3.3V/5V designs where extended voltage range is unnecessary. |
| LTC3260IGN#PBF | Low-noise inverting charge pump with integrated LDOs, 4.5–32V input, 12-lead MSOP package, 20µA IQ | Provides regulated ±VOUT with <10µVRMS noise; requires more board area and external LDO bypass caps | Choose LTC3260IGN#PBF when ultra-low noise and tight regulation outweigh size/cost constraints in precision ADC/DAC supplies. |
Compared with MAX1044CPA+, LTC1044AIN8#PBF supports 2× higher input voltage and includes BOOST functionality for dynamic output impedance control; compared with LTC3260IGN#PBF, it offers simpler implementation and lower BOM count but lacks integrated regulation and noise filtering.
Availability
LTC1044AIN8#PBF is available at Aetrix Electronics and suitable for portable instrumentation power, precision sensor biasing, automotive body control, and industrial analog I/O modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for LTC1044AIN8#PBF 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 family.
The LTC1044A product line was designed specifically for inductorless DC/DC conversion in space-constrained, low-noise analog systems-emphasizing precision voltage division, wide input range, and minimal external component count.
FAQ
What is the maximum input voltage rating for the LTC1044AIN8#PBF?
The LTC1044AIN8#PBF has an absolute maximum supply voltage rating of 13V. Its specified operating supply voltage range is 1.5V to 12V, making it suitable for direct connection to 9V batteries, 12V automotive systems, and wall adapters without external regulators. Exceeding 13V may cause permanent damage per Absolute Maximum Ratings.
Can the LTC1044AIN8#PBF generate a precise half-supply voltage?
Yes, the LTC1044AIN8#PBF supports ultra-precision voltage division with VOUT = VIN/2 ±20ppm accuracy. This is achieved using the internal switched-capacitor network without external resistors, provided load current remains below 100nA. At higher loads, output impedance causes deviation, but regulation remains stable up to 15mA with ±0.02% load regulation.
How does the BOOST pin affect performance of the LTC1044AIN8#PBF?
Connecting the BOOST pin (Pin 1) of the LTC1044AIN8#PBF to V+ increases the internal oscillator frequency by approximately seven times. This reduces effective output resistance (e.g., from ~200Ω to ~30Ω at 10kHz), lowers output voltage ripple, and allows use of smaller flying capacitors-critical for miniaturized PCB layouts and high-current applications.
Is the LTC1044AIN8#PBF pin-compatible with the original LTC1044?
Yes, the LTC1044AIN8#PBF is pin-compatible and functionally backward-compatible with the LTC1044, but adds key enhancements: higher 12V max operating voltage (vs. 7V), improved 97% voltage conversion efficiency, BOOST pin for frequency scaling, and extended –40°C to +85°C temperature range. It directly replaces LTC1044 in existing designs with no layout changes required.
What external components are required for basic inverting operation of the LTC1044AIN8#PBF?
For basic inverting operation (VOUT = –V+), the LTC1044AIN8#PBF requires two external flying capacitors (C1 and C2), typically 10µF aluminum or tantalum electrolytics. No diodes, inductors, or precision resistors are needed. The LV pin (6) may be left floating for V+ ≥ 3V; OSC (7) and BOOST (1) pins can remain unconnected for default 5kHz operation.
LTC1044AIN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LTC1044AIN8#PBF FAQ
1.How can I place an order for LTC1044AIN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1044AIN8#PBF 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 LTC1044AIN8#PBF reliable?
The price and inventory of LTC1044AIN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1044AIN8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1044AIN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1044AIN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1044AIN8#PBF?
LTC1044AIN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1044AIN8#PBF 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 LTC1044AIN8#PBF?
For technical support, including LTC1044AIN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1044AIN8#PBF requirements.
6.How does Aetrix verify that LTC1044AIN8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1044AIN8#PBF 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 LTC1044AIN8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1044AIN8#PBF?
All LTC1044AIN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1044AIN8#PBF, 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 LTC1044AIN8#PBF part is unused and in its original packaging.
Return procedure for LTC1044AIN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1044AIN8#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
