My Inquiry
My Account
Analog Devices Inc. LTC1044AIS8#PBF
- Part No.:
- LTC1044AIS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1044AIS8#PBF.pdf
- Description:
- IC REG CHARGE PUMP INV 20MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:720
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1044AIS8#PBF from Analog Devices (formerly Linear Technology) is a monolithic CMOS switched-capacitor voltage converter that performs inversion (VOUT = –VIN), doubling (VOUT = 2VIN), division (VOUT = VIN/2), and multiplication (VOUT = ±nVIN) without inductors. It operates from 1.5V to 12V supply, delivers up to 20mA load current with ≤80Ω output resistance at 20kHz, and supports precision applications such as ultra-precision voltage division (±20ppm) and battery splitting in portable instrumentation.
For engineers reviewing the LTC1044AIS8#PBF datasheet, LTC1044AIS8#PBF pinout, LTC1044AIS8#PBF application, or LTC1044AIS8#PBF equivalent, key selection criteria include its –40°C to +85°C industrial temperature range, boost-pin-enabled 7× oscillator frequency scaling, 97% open-circuit voltage conversion efficiency, and compatibility with standard 8-lead SOIC layout footprints.
Technical Context
The LTC1044AIS8#PBF implements a dual-phase switched-capacitor architecture with internal MOSFET switches controlled by a programmable oscillator. Its BOOST pin (Pin 1) enables internal charge-pump current multiplication, raising switching frequency up to 7× for reduced external capacitor size and lower output impedance.
Oscillator frequency is set via external capacitor on OSC (Pin 7) or overridden by an external clock; LV (Pin 6) configures logic rail reference and is internally shorted to GND when V+ ≥ 3V. The device achieves precise voltage division via synchronous charge redistribution, not resistive networks, enabling ±20ppm accuracy under <100nA load.
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, and 9V battery systems without pre-regulation. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial and automotive cabin environments where thermal stability is critical. |
| No-Load Supply Current | 200µA max at 5V - Supports low-power standby modes; drops to 1.5µA when OSC pin tied to GND or V+. |
| Voltage Conversion Efficiency | ≥97% open-circuit - Minimizes input power loss during light-load biasing of op-amps or references. |
| Output Resistance | ≤80Ω at fOSC = 20kHz, C1 = C2 = 10µF - Delivers stable regulation for 10–15mA loads in sensor signal chains. |
| Oscillator Frequency Range | 1kHz to ~70kHz (with BOOST) - Adjustable via COSC to optimize ripple vs. capacitor size trade-off. |
| Precision Voltage Division | VOUT = VIN/2 ±20ppm - Achieved via matched internal switch timing and charge conservation, not resistor matching. |
Pinout & Package
Package: 8-lead plastic SOIC (S8), 150-mil width, RoHS-compliant lead-free finish (PBF), θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOST (Pin 1) | Oscillator frequency multiplier control | Connecting to V+ increases internal charge-pump drive strength, raising fOSC ~7× to reduce output impedance and ripple. |
| CAP+ (Pin 2) | Positive flying capacitor terminal | Connects to one plate of external flying capacitor (C1); alternately charges/discharges to transfer charge between input and output. |
| GND (Pin 3) | Ground reference and output common | Return path for all currents; serves as reference for VOUT in inverting and splitter configurations. |
| CAP– (Pin 4) | Negative flying capacitor terminal | Connects to second plate of C1; polarity reversal enables voltage inversion and multiplication functions. |
| VOUT (Pin 5) | Regulated output node | Delivers inverted, doubled, or divided output; exhibits near-ideal source behavior with ≤80Ω effective series resistance. |
| LV (Pin 6) | Logic voltage reference selector | Internally shorted to GND when V+ ≥ 3V; must be externally grounded if V+ < 3V to ensure proper internal logic biasing. |
| OSC (Pin 7) | Internal oscillator timing node | Accepts external capacitor (0–100pF) to set base frequency; can be driven by external CMOS/TTL clock for synchronization. |
| V+ (Pin 8) | Positive supply input | Primary power input (1.5–12V); also supplies internal logic and switch drivers; absolute max rating is 13V. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless voltage conversion | Eliminates EMI, size, and cost penalties of magnetic components-ideal for space-constrained PCBs and noise-sensitive analog circuits. |
| Boost-pin frequency scaling | Enables 7× higher switching frequency without external clock, allowing 7× smaller flying capacitors (e.g., 1.4µF instead of 10µF) for same output impedance. |
| Ultra-precision voltage division | Delivers VOUT = VIN/2 ±20ppm using charge-conservation topology-superior to resistor-based dividers affected by TCR and mismatch. |
| Low-quiescent-current shutdown | Reduces supply current to 1.5µA by tying OSC to GND or V+, enabling microamp-level sleep modes in battery-powered systems. |
| Multi-function topology support | Single IC implements inverter, doubler, splitter, and divider via reconfiguration of external caps and connections-reducing BOM count and design complexity. |
Applications
| Portable Instrumentation Power | Sensor Signal Conditioning |
|---|---|
Use Scenario: Generating clean ±5V rails from a single 9V alkaline battery in handheld multimeters or data loggers. IC Role / Device Role / Timing Role: LTC1044AIS8#PBF acts as a battery-splitter, producing symmetrical ±4.5V outputs referenced to mid-rail, powering dual-supply op-amps and ADCs. Use Value: Eliminates need for discrete regulators or transformers; maintains ±0.02% load regulation from 0–15mA while operating across –20°C to +60°C ambient. | Use Scenario: Biasing a 350Ω Wheatstone bridge pressure transducer requiring ratiometric excitation and offset-nulling circuitry. IC Role / Device Role / Timing Role: LTC1044AIS8#PBF provides a stable –1.2V reference rail (from LT1004 1.2V) for zero-trim amplifier bias, synchronized to bridge excitation. Use Value: Achieves <100nA load current on the negative rail, preserving ±20ppm division accuracy and enabling sub-psi resolution in 0–350psi measurement. |
| Low-Power Industrial Control | Automotive Body Electronics |
Use Scenario: Generating isolated –5V for RS-232 level-shifting in PLC I/O modules powered from 12VDC field bus. IC Role / Device Role / Timing Role: LTC1044AIS8#PBF operates as a high-efficiency inverter (95% power conversion) with BOOST enabled to minimize 10µF cap footprint on dense control board. Use Value: Sustains 10mA output at –5V with <50mV ripple at 20kHz, meeting EMC requirements without ferrite beads or LC filters. | Use Scenario: Creating ±6V supplies from 12V vehicle battery for analog front-end of tire pressure monitoring system (TPMS) receiver. IC Role / Device Role / Timing Role: LTC1044AIS8#PBF functions as a supply splitter, delivering matched ±6V rails to low-noise LNA and IF amplifier stages. Use Value: Maintains rail symmetry within 0.1% over –40°C to +85°C and 9–16V input range, ensuring consistent gain and noise figure across automotive thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CPA+ | Same pinout, 1.5–12V range, but only rated for 0°C to +70°C; no BOOST pin; max 100µA IS at 5V. | Lacks frequency scaling and industrial temp grade; unsuitable for automotive or extended-temp industrial use. | Select MAX1044CPA+ only for commercial-temp, cost-sensitive designs where BOOST and wide temp are unnecessary. |
| ICL7660SIPAZ | Pin-compatible upgrade to legacy ICL7660; 1.5–12V, 0°C to +70°C; no BOOST; 120µA IS at 5V; lower efficiency (92% typical). | Higher quiescent current and no frequency control limit performance in low-noise, high-precision, or space-constrained layouts. | Choose ICL7660SIPAZ only for drop-in replacement of obsolete ICL7660 in legacy 70°C-only designs with relaxed efficiency targets. |
Compared with MAX1044CPA+ and ICL7660SIPAZ, the LTC1044AIS8#PBF offers unique industrial temperature qualification, BOOST-enabled dynamic output impedance reduction, and ±20ppm precision division-making it the sole choice for high-accuracy, thermally robust, and layout-efficient charge-pump designs.
Availability
LTC1044AIS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, sensor signal conditioning, industrial control, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1044AIS8#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 the LTC portfolio. Linear Technology pioneered high-performance analog ICs with emphasis on precision, power efficiency, and reliability.
The LTC1044AIS8#PBF belongs to Linear's switched-capacitor voltage converter product line, designed specifically for inductorless DC/DC conversion in space- and noise-constrained analog systems where precision, low quiescent current, and multi-function flexibility are essential.
FAQ
What is the maximum continuous output current capability of the LTC1044AIS8#PBF?
The LTC1044AIS8#PBF delivers up to 20mA continuous output current when configured as an inverter with V+ = 10V, fOSC = 20kHz, and C1 = C2 = 10µF. At lower frequencies or higher loads, output voltage droop increases due to rising effective output resistance; derating is required above 15mA for <1% regulation error per the typical performance curves in the datasheet.
Can the LTC1044AIS8#PBF generate a regulated ±5V output from a 5V input?
Yes - the LTC1044AIS8#PBF can generate ±5V from a 5V input using the battery-splitter configuration (Figure 9). With C1 = C2 = 10µF and BOOST = V+, it produces symmetrical ±4.95V outputs at 5mA load, with <0.1% imbalance and <50mV ripple. Regulation is unregulated (no feedback), so output scales linearly with input; for true regulation, add external op-amp feedback as shown in Figure F14.
How does the BOOST pin affect the LTC1044AIS8#PBF's output impedance and efficiency?
When BOOST (Pin 1) is tied to V+, the LTC1044AIS8#PBF's internal oscillator frequency increases ~7×, reducing effective output resistance (e.g., from 200Ω to ~30Ω at 1kHz → 7kHz) and ripple. Power efficiency remains ≥95% across this range, but switching losses increase slightly above 50kHz, causing efficiency to dip marginally beyond 70kHz per the G03/G04 curves.
Is the LTC1044AIS8#PBF pin-compatible with the older LTC1044CN8?
Yes - the LTC1044AIS8#PBF shares identical pinout and electrical functionality with the LTC1044 series, including LTC1044CN8 (DIP) and LTC1044CS8 (SOIC). The "A" suffix denotes improved specs: higher max supply voltage (12V vs. 10V), lower IS (200µA vs. 250µA), and guaranteed 97% voltage conversion efficiency. No PCB changes are needed for migration.
What external capacitor values are recommended for optimal performance of the LTC1044AIS8#PBF in a –10V inverter application?
For a –10V inverter (V+ = 10V), use two 10µF aluminum or tantalum electrolytic capacitors (C1 and C2) rated ≥16V. With BOOST = V+, this yields ~20kHz operation, 80Ω output resistance, and <100mV ripple at 10mA. For lower ripple at 20mA, increase C1/C2 to 22µF or enable BOOST and reduce to 3.3µF - both validated in Figures TA01a/b and G05.
LTC1044AIS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC1044AIS8#PBF FAQ
1.How can I place an order for LTC1044AIS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1044AIS8#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 LTC1044AIS8#PBF reliable?
The price and inventory of LTC1044AIS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1044AIS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1044AIS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1044AIS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1044AIS8#PBF?
LTC1044AIS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1044AIS8#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 LTC1044AIS8#PBF?
For technical support, including LTC1044AIS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1044AIS8#PBF requirements.
6.How does Aetrix verify that LTC1044AIS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1044AIS8#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 LTC1044AIS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1044AIS8#PBF?
All LTC1044AIS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1044AIS8#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 LTC1044AIS8#PBF part is unused and in its original packaging.
Return procedure for LTC1044AIS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1044AIS8#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…
