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Analog Devices Inc. LT1054ISW#TRPBF
- Part No.:
- LT1054ISW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1054ISW#TRPBF.pdf
- Description:
- IC REG CHARGE PUMP ADJ/2.5V 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,640
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Product details
Overview
LT1054ISW#TRPBF from Analog Devices is a monolithic bipolar switched-capacitor voltage converter and regulator in 16-lead plastic SOIC (SW16) package, operating from 3.5V to 15V input, delivering up to 100mA output current with 1.1V typical voltage loss at 100mA, integrated 2.5V reference, and external shutdown capability. It serves as a regulated negative voltage inverter or doubler in isolated analog power rails.
For engineers reviewing the LT1054ISW#TRPBF datasheet, LT1054ISW#TRPBF pinout, LT1054ISW#TRPBF application, or LT1054ISW#TRPBF equivalent, key selection criteria include its regulated inverting capability, 25kHz internal oscillator, feedback-based regulation architecture, shutdown threshold of ≈0.45V, and compatibility with standard tantalum capacitor networks for low-ESR operation.
Technical Context
The LT1054ISW#TRPBF implements a charge-pump topology with adaptive bipolar switch drivers optimized for efficiency across 10mA–100mA load range. Its error amplifier compares feedback voltage against an internal 2.5V reference to regulate output by modulating PNP switch conduction, enabling stable negative or doubled outputs despite input or load variation.
It features a self-contained 25kHz oscillator (adjustable via Pin 7), dedicated CAP+/CAP– terminals for bidirectional charge transfer, and FB/SHDN pin that serves dual roles: feedback node for regulation and logic-level shutdown input (<0.45V). The SW16 package accommodates internal routing for NC pins while preserving functional pinout alignment with legacy SO-8 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 15V - supports wide industrial supply rails without external LDO pre-regulation |
| Max Output Current | 100mA - sufficient for op-amp biasing, sensor excitation, and low-power analog subsystems |
| Voltage Loss @100mA | 1.1V typical - determines minimum input headroom required for target regulated output (e.g., –5V needs ≥6.1V VIN) |
| Oscillator Frequency | 25kHz nominal - balances switching loss vs. capacitor size; adjustable externally via Pin 7 |
| Reference Voltage | 2.5V ±0.15V - precision internal reference enables accurate resistor-divider-based regulation |
| Shutdown Current | <100µA - enables ultra-low quiescent power during system sleep modes |
| Operating Temp Range | –40°C to +100°C - qualified for extended industrial temperature environments |
Pinout & Package
LT1054ISW#TRPBF is housed in a 16-lead plastic SOIC (SW16) package with 1.27mm pitch, thermal resistance θJA = 150°C/W, and exposed pad not present. Pin 1 is FB/SHDN; Pins 2 and 4 are CAP+ and CAP–; Pin 5 is VOUT; Pin 6 is VREF; Pin 7 is OSC; Pin 8 is V+; Pins 9–16 are NC (no connect), confirmed per Analog Devices datasheet Rev. I pin configuration diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB/SHDN) | Inverting input of error amplifier / shutdown control | Pull ≤0.45V to disable switching and reduce supply current to <100µA; otherwise sets regulated output via R1/R2 divider |
| Pin 2 (CAP+) | Positive terminal of input flying capacitor | Switched between V+ and GND to charge CIN; carries peak current ≈2.2×IOUT |
| Pin 3 (GND) | Ground reference and substrate tie | Must remain at lowest potential; VOUT (Pin 5) must never exceed this pin to avoid substrate diode conduction |
| Pin 4 (CAP–) | Negative terminal of input flying capacitor | Switched between GND and VOUT to transfer charge to COUT; unidirectional bipolar current path |
| Pin 5 (VOUT) | Regulated output and substrate connection | Delivers inverted or doubled voltage; tied to die substrate-requires careful layout to prevent start-up failure |
| Pin 6 (VREF) | 2.5V precision reference output | Supplies reference for feedback network; max 60µA load recommended for regulation accuracy |
| Pin 7 (OSC) | Oscillator timing node | Internally connected to ~150pF capacitor; supports frequency tuning or external synchronization |
| Pin 8 (V+) | Main input supply | Source for charging CIN; bypass capacitor ≥2µF low-ESR tantalum required to handle pulsed input current |
Key Features
| Feature | Design Value |
|---|---|
| Integrated regulation | Enables stable negative or doubled output voltages without external error amp or reference |
| Adaptive switch driver | Maintains high efficiency across 10mA–100mA load range by optimizing drive strength dynamically |
| External shutdown | Reduces quiescent current to <100µA using simple logic-level signal on FB/SHDN pin |
| Oscillator synchronization | Allows Pin 7 to be driven by external clock for EMI reduction or system timing alignment |
| Pin-compatible upgrade | Direct replacement for LTC1044/ICL7660 in SW16 footprint with improved current and regulation |
Applications
| Industrial Sensor Signal Conditioning | Isolated Bipolar Op-Amp Supply |
|---|---|
|
Use Scenario: Strain gauge bridge amplification requiring precise ±12V rails from single 5V or 12V source. IC Role / Device Role / Timing Role: LT1054ISW#TRPBF generates regulated –12V rail while companion device provides +12V; operates at fixed 25kHz to minimize interference with bridge measurement bandwidth. Use Value: Eliminates need for dual-output transformer or discrete charge-pump ICs; maintains <±1% output stability over temperature and load. |
Use Scenario: Dual-supply instrumentation amplifier (e.g., LT1013) powered from 5V USB or microcontroller rail. IC Role / Device Role / Timing Role: LT1054ISW#TRPBF acts as negative voltage inverter to create –5V rail; VREF pin supplies reference for gain-setting resistors. Use Value: Enables true bipolar operation without external regulators; 2.5V reference ensures matched positive/negative gain scaling. |
| Portable Medical Instrument Biasing | Low-Power Data Acquisition Front-End |
|
Use Scenario: Portable ECG front-end requiring low-noise ±2.5V analog supply from coin-cell or Li-ion battery. IC Role / Device Role / Timing Role: LT1054ISW#TRPBF configured as regulated inverter; shutdown pin controlled by MCU to disable during standby. Use Value: Achieves <100µA shutdown current and 1.1V voltage loss at 20mA, extending battery life while maintaining ADC reference integrity. |
Use Scenario: 16-bit SAR ADC (e.g., AD7682) needing clean –2.5V reference rail in space-constrained IoT node. IC Role / Device Role / Timing Role: LT1054ISW#TRPBF delivers regulated –2.5V using R1/R2 divider tied to VREF; OSC pin left floating for nominal 25kHz operation. Use Value: Provides stable, low-ripple negative reference without magnetic components; SW16 package fits tight PCB layouts. |
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 |
|---|---|---|---|
| LTC1044CS8#TRPBF | No internal reference or regulation circuitry; fixed inverting only; 10mA max output; 3.5V–15V input | Requires external op-amp and reference for regulation; unsuitable for >10mA regulated loads | Select when cost-sensitive, low-current, non-regulated inversion suffices and board space allows SO-8 |
| MAX680CPA+ | CMOS process; 100mA output; no regulation; 4.5V–20V input; 10kHz oscillator; SO-8 package | Lacks feedback loop and reference; higher voltage loss (~2.5V @100mA); no shutdown function | Choose for higher input voltage tolerance and lower quiescent current (120µA), but accept reduced regulation capability |
Compared with LTC1044CS8#TRPBF and MAX680CPA+, the LT1054ISW#TRPBF uniquely integrates regulation, 2.5V reference, and shutdown in SW16-enabling compact, high-accuracy negative rail generation where load stability and low-noise performance are critical.
Availability
LT1054ISW#TRPBF is available at Aetrix Electronics and suitable for industrial sensor conditioning, portable medical instrumentation, isolated op-amp supplies, and low-power data acquisition front-ends requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LT1054ISW#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The LT1054 belongs to Analog Devices' legacy Linear Technology switched-capacitor converter product line, designed specifically for high-efficiency, low-noise, regulated DC/DC conversion in analog-intensive systems where inductors are undesirable.
FAQ
What is the maximum output current capability of the LT1054ISW#TRPBF?
The LT1054ISW#TRPBF delivers up to 100mA of continuous output current in inverting or doubler configurations, as specified in the Electrical Characteristics table under "Output Current" with test conditions of CIN = COUT = 100µF tantalum and TJ = 25°C. Derating applies above 25°C ambient due to thermal limits of the SW16 package (θJA = 150°C/W).
Can the LT1054ISW#TRPBF generate a regulated positive voltage?
No-the LT1054ISW#TRPBF is inherently configured for negative voltage generation (inverter or negative doubler) or positive voltage doubling relative to ground. Its internal architecture ties VOUT to substrate and requires VOUT ≤ GND for reliable startup; positive regulation requires external level-shifting circuitry not supported natively by the LT1054ISW#TRPBF.
How does the FB/SHDN pin function in regulation mode versus shutdown mode?
In regulation mode, the FB/SHDN pin serves as the inverting input of the internal error amplifier, accepting voltage from an external R1/R2 divider to set output voltage. In shutdown mode, pulling FB/SHDN below ≈0.45V disables the oscillator and reference, reducing supply current to <100µA; the LT1054ISW#TRPBF resumes normal operation when the pin rises above the threshold.
What capacitor types and values are recommended for stable operation of the LT1054ISW#TRPBF?
Analog Devices specifies solid tantalum capacitors for both CIN and COUT: minimum 10µF for CIN and 100µF for COUT in regulated configurations, with low ESR (<1Ω) critical to minimize voltage loss. For CIN, ESR impact is quadrupled due to 2.2× peak switch current; aluminum electrolytic may be paralleled with tantalum to balance cost and performance.
Is the LT1054ISW#TRPBF pin-compatible with the LT1054CS8#TRPBF?
No-while both share functional equivalence in core operation, the LT1054ISW#TRPBF uses a 16-pin SW package with NC pins (9–16), whereas the LT1054CS8#TRPBF is an 8-pin SOIC. They are not mechanically or electrically pin-compatible; migration requires PCB redesign. However, the LT1054ISW#TRPBF is pin-compatible with other SW16 variants like LT1054CSW#TRPBF.
LT1054ISW#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:
- -40°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1054ISW#TRPBF FAQ
1.How can I place an order for LT1054ISW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1054ISW#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 LT1054ISW#TRPBF reliable?
The price and inventory of LT1054ISW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1054ISW#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1054ISW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1054ISW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1054ISW#TRPBF?
LT1054ISW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1054ISW#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 LT1054ISW#TRPBF?
For technical support, including LT1054ISW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1054ISW#TRPBF requirements.
6.How does Aetrix verify that LT1054ISW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1054ISW#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 LT1054ISW#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1054ISW#TRPBF?
All LT1054ISW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1054ISW#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 LT1054ISW#TRPBF part is unused and in its original packaging.
Return procedure for LT1054ISW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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