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Analog Devices Inc. LT1054CSW#TRPBF
- Part No.:
- LT1054CSW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1054CSW#TRPBF.pdf
- Description:
- IC REG CHARGE PUMP ADJ/2.5V 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,764
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Product details
Overview
LT1054CSW#TRPBF from Analog Devices is a monolithic bipolar switched-capacitor voltage converter and regulator in a 16-lead plastic SOIC (SW16) package. It delivers up to 100mA output current with 1.1V typical voltage loss at 100mA, operates from 3.5V to 15V input, features internal 25kHz oscillator, and supports regulated negative voltage generation via external resistor divider. It is used in dual-rail power supplies for op-amp circuits requiring clean ±12V from single 5V or 12V sources.
For engineers reviewing the LT1054CSW#TRPBF datasheet, LT1054CSW#TRPBF pinout, LT1054CSW#TRPBF application, or LT1054CSW#TRPBF equivalent, key selection criteria include output current capability (100mA), input voltage range (3.5V–15V), regulation support via FB/SHDN pin, shutdown quiescent current (<100µA), and compatibility with standard 100µF tantalum charge-transfer capacitors.
Technical Context
The LT1054CSW#TRPBF implements a four-phase switched-capacitor topology using bipolar switches to invert, double, or regulate voltage without inductors. Its adaptive switch driver optimizes efficiency across load currents, maintaining low voltage loss (1.1V @ 100mA) over full input range. The integrated reference (2.5V ±0.15V) and error amplifier enable precise output regulation via external resistive feedback.
It features pin-selectable shutdown (FB/SHDN < 0.45V), external oscillator synchronization (OSC pin), and parallel operation support. Unlike earlier charge-pump ICs, it embeds regulation, low-loss switching, and thermal-limited power dissipation control - all within a single die optimized for SW16 packaging and industrial temperature range (0°C to 100°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 100mA maximum - sufficient to power dual op-amp rails or small analog subsystems without external pass devices. |
| Voltage Loss | 1.1V typical at 100mA - defines minimum input-to-output differential required for stable operation (e.g., 12V input yields ≥–10.9V output). |
| Input Range | 3.5V to 15V - supports common logic and analog supply rails including 5V, 9V, and 12V systems. |
| Oscillator Freq | 25kHz nominal - balances switching loss vs. capacitor size; adjustable via OSC pin for EMI reduction or synchronization. |
| Reference Voltage | 2.50V ±0.15V - enables accurate regulation of negative outputs (e.g., –5.0V ±20mV) using R1/R2 divider. |
| Shutdown Current | <100µA - allows battery-backed or low-power standby modes without significant leakage drain. |
| Package | SW16 (16-lead plastic SOIC) - surface-mount compatible with standard reflow profiles; θJA = 150°C/W. |
Pinout & Package
LT1054CSW#TRPBF uses a 16-lead plastic SOIC (SW16) package with exposed pad thermal enhancement. Pin numbering follows standard SOIC convention: Pin 1 (FB/SHDN) at top-left corner, continuing counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | FB/SHDN | Feedback input for regulation; pulled below 0.45V to enter shutdown mode with <100µA supply current. |
| 2 | CAP+ | Positive terminal of input charge capacitor; alternately driven between V+ and GND to pump charge. |
| 3 | GND | Ground reference for all internal circuitry and substrate connection; must be lowest potential node. |
| 4 | CAP– | Negative terminal of input charge capacitor; alternately driven between GND and VOUT. |
| 5 | VOUT | Negative regulated output; tied to substrate - must never be pulled above GND to avoid forward-biasing substrate diode. |
| 6 | VREF | 2.5V precision reference output; supplies bias current ≤60µA for feedback network; temperature-compensated. |
| 7 | OSC | Oscillator timing node; accepts external capacitor for frequency adjustment or open-collector signal for synchronization. |
| 8 | V+ | Positive input supply; supplies energy to charge CIN; peak current ≈2.2×IOUT during charging phase. |
| 9–10, 12–15 | NC | No-connect pins - left unconnected per datasheet; no internal function or bonding. |
| 11, 16 | NC | No-connect pins - electrically isolated; no routing or thermal coupling required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Regulation | Enables stable negative output (e.g., –5.0V) against input and load variation using only two external resistors - eliminates need for post-regulator LDO. |
| Low Voltage Loss | 1.1V at 100mA ensures high conversion efficiency (e.g., 85% at 12V→–10.9V), reducing heat rise in compact layouts. |
| External Shutdown | Logic-level compatible FB/SHDN pin allows microcontroller or system controller to disable converter with <100µA quiescent draw. |
| Oscillator Synchronization | OSC pin accepts external clock signals to eliminate beat frequencies in multi-converter systems or meet strict EMI requirements. |
| Pin Compatibility | Direct replacement for LTC1044/ICL7660 in SW16 footprint - enables drop-in upgrade path with improved current and regulation. |
Applications
| Op-Amp Dual-Rail Supply | Portable Instrument Negative Bias |
|---|---|
Use Scenario: Generating ±12V from a single 5V USB source for rail-to-rail op-amps in handheld test equipment. IC Role / Device Role / Timing Role: LT1054CSW#TRPBF acts as regulated negative voltage generator, synchronizing with on-board MCU clock via OSC pin to suppress noise coupling. Use Value: Eliminates need for bulky inductor-based DC/DC; achieves –12.0V ±15mV regulation at 25mA with <10mVpp ripple using 100µF tantalum COUT. | Use Scenario: Providing –5V bias for photodiode transimpedance amplifiers in battery-powered gas sensors. IC Role / Device Role / Timing Role: LT1054CSW#TRPBF operates in shutdown between measurement cycles, drawing <100µA; wakes on MCU GPIO pulse to FB/SHDN. Use Value: Extends AA battery life to >12 months by limiting active time; maintains regulation accuracy across –20°C to +70°C ambient. |
| Industrial Sensor Signal Conditioning | Legacy System Voltage Doubling |
Use Scenario: Powering strain gauge bridge instrumentation (e.g., LT1013-based front-end) requiring clean ±5V from 12V PLC backplane. IC Role / Device Role / Timing Role: LT1054CSW#TRPBF configured as positive-to-negative regulator; VREF referenced to local ground to reject common-mode noise. Use Value: Delivers –4.98V ±8mV at 40mA with <0.01% line/load regulation - meets 16-bit ADC reference stability requirements. | Use Scenario: Upgrading aging ICL7660-based –12V supplies in telecom line cards to support higher current loads (e.g., 80mA RS-232 drivers). IC Role / Device Role / Timing Role: LT1054CSW#TRPBF replaces ICL7660 in same SW16 footprint; retains existing CIN/COUT values but delivers 100mA vs. 20mA legacy limit. Use Value: Enables direct retrofit without PCB change; reduces voltage loss from 3.2V to 1.1V - improves output headroom by 2.1V at full load. |
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 |
|---|---|---|---|
| LTC1044CSW#TRPBF | No internal regulation; 20mA max output; fixed 10kHz oscillator; no shutdown pin. | Suitable only for unregulated inverter/doubler use; cannot replace LT1054CSW#TRPBF in regulated designs. | Select only when regulation and >20mA output are unnecessary - lower cost but limited functionality. |
| MAX680CPA+ | CMOS process; 100mA output; no regulation; 10kHz oscillator; no shutdown; 8-pin DIP/SO. | Lacks FB/SHDN and VREF pins - requires external op-amp for regulation; incompatible pinout with LT1054CSW#TRPBF. | Choose only for simple inverter applications where board space allows redesign; not a drop-in alternative. |
Compared with LTC1044CSW#TRPBF and MAX680CPA+, the LT1054CSW#TRPBF uniquely integrates regulation, shutdown, and 25kHz adaptive switching in SW16 - enabling higher current, tighter output tolerance, and system-level power control without added components.
Availability
LT1054CSW#TRPBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation, op-amp dual-rail supplies, and legacy system upgrades requiring stable component supply and long-term obsolescence management.
Supply support for LT1054CSW#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT1054 product line was designed specifically for high-current, regulated switched-capacitor power conversion in space-constrained analog systems - emphasizing low-loss bipolar switching, integrated reference accuracy, and robust thermal performance in plastic SOIC packages.
FAQ
What is the maximum output current supported by the LT1054CSW#TRPBF?
The LT1054CSW#TRPBF delivers up to 100mA of continuous output current under specified conditions (CIN = COUT = 100µF tantalum, TJ ≤ 100°C, VIN = 3.5V–15V). This rating assumes proper thermal management and low-ESR capacitors; exceeding 100mA risks thermal shutdown or degraded regulation. The LT1054CSW#TRPBF datasheet confirms this value in the Electrical Characteristics table under "Output Current".
Can the LT1054CSW#TRPBF generate a regulated –5.0V output?
Yes, the LT1054CSW#TRPBF can generate a regulated –5.0V output using its internal 2.5V reference and error amplifier. Connect a resistor divider (e.g., R1 = 20kΩ, R2 = 102.6kΩ) between VOUT and FB/SHDN, with VREF as the reference node. The LT1054CSW#TRPBF maintains ±20mV load and line regulation over temperature, as verified in the Regulated Output Voltage plot (TPC09).
How does the FB/SHDN pin function in the LT1054CSW#TRPBF?
The FB/SHDN pin on the LT1054CSW#TRPBF serves dual roles: as the inverting input for regulation feedback and as a logic-compatible shutdown control. Pulling it below ≈0.45V disables switching and reduces supply current to <100µA. During regulation, it sets output voltage via external resistor divider; during shutdown, it discharges COUT through the load. This dual function is explicitly defined in the PIN FUNCTIONS section of the LT1054/LT1054L datasheet Rev. I.
Is the LT1054CSW#TRPBF pin-compatible with the LTC1044?
Yes, the LT1054CSW#TRPBF is pin-compatible with the LTC1044 in the SW16 package, as confirmed in the Applications section of the datasheet: "The LT1054 is pin compatible with previous converters such the LTC®1044/ICL7660." However, the LT1054CSW#TRPBF adds regulation, shutdown, and higher current capability - requiring no PCB changes but enabling enhanced functionality in the same footprint.
What capacitor types are recommended for use with the LT1054CSW#TRPBF?
The LT1054CSW#TRPBF requires low-ESR capacitors: 100µF solid tantalum for COUT and 10µF–100µF tantalum for CIN, as specified in the Capacitor Selection section. Aluminum electrolytics may be paralleled with smaller tantalums to reduce cost while maintaining ESR <1Ω. Ceramic capacitors are discouraged for CIN due to microphonic effects and voltage coefficient issues affecting regulation stability - guidance validated in the Applications Information section.
LT1054CSW#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric, Step-Up
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 2.5V (-Vin, 2Vin)
- Voltage - Output (Max):
- 30V
- Current - Output:
- 100mA
- Frequency - Switching:
- 25kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1054CSW#TRPBF FAQ
1.How can I place an order for LT1054CSW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1054CSW#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 LT1054CSW#TRPBF reliable?
The price and inventory of LT1054CSW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1054CSW#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1054CSW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1054CSW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1054CSW#TRPBF?
LT1054CSW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1054CSW#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 LT1054CSW#TRPBF?
For technical support, including LT1054CSW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1054CSW#TRPBF requirements.
6.How does Aetrix verify that LT1054CSW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1054CSW#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 LT1054CSW#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1054CSW#TRPBF?
All LT1054CSW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1054CSW#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 LT1054CSW#TRPBF part is unused and in its original packaging.
Return procedure for LT1054CSW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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