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Analog Devices Inc. LT1026IS8#TRPBF
- Part No.:
- LT1026IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1026IS8#TRPBF.pdf
- Description:
- IC REG CHRG PUMP INV 15MA DL 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
LT1026IS8#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic switched-capacitor voltage doubler and inverter IC designed to generate dual-polarity outputs from a single positive input. It operates from 4V to 10V input, delivers ±7V to ±18V output, supports ≥10mA total output current per rail, and requires only four 1µF external capacitors-no inductors. It is used in RS232 power supplies, op amp bipolar biasing, and battery-splitting applications where compact, inductorless DC/DC conversion is critical.
For engineers reviewing the LT1026IS8#TRPBF datasheet, LT1026IS8#TRPBF pinout, LT1026IS8#TRPBF application, or LT1026IS8#TRPBF equivalent, this page provides verified electrical specifications, thermal ratings for –40°C to +85°C operation, package dimensions for the 8-lead SOIC (S8), and real-world design context for dual-rail generation without magnetics.
Technical Context
The LT1026IS8#TRPBF implements a two-stage charge-pump architecture: first doubling VIN using C1, then inverting the doubled voltage using C2 to produce –VOUT. Its bipolar process eliminates latchup risk and enables up to 36V internal node swing. Output voltage is unregulated and load-dependent-e.g., ±6.25V/±5.5V at ±10mA with VIN = 5V.
It features substrate diode biasing tied to –VOUT, requiring –VOUT to be grounded if unused to prevent forward conduction. No internal overload protection exists; sustained shorts cause thermal overload but brief shorts are non-damaging. Ripple is capacitor- and load-sensitive-22µF caps reduce ripple to <10mVP-P at 5mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 10V - defines minimum logic-supply compatibility and maximum safe operating voltage |
| Output Voltage (±) | Up to ±18V at no load, ±15.25V/±14.5V at ±15mA with VIN = 10V - sets usable headroom for op amp rails or RS232 drivers |
| Output Current | ≥10mA per rail - sufficient to drive multiple op amps or line drivers without parallel staging |
| Operating Temp Range | –40°C to +85°C - qualified for industrial environments, not automotive or extended military |
| Package | 8-lead plastic SOIC (S8) - surface-mount compatible, θJA = 150°C/W, JEDEC MS-012AC compliant |
| Capacitor Requirement | Four 1µF ceramic or tantalum caps - enables ultra-compact layout; performance degrades below 0.1µF |
| Supply Current | 7–30mA depending on VIN and load - directly impacts system quiescent power budget |
Pinout & Package
LT1026IS8#TRPBF is housed in an 8-lead plastic SOIC (S8) package, 3.9mm × 4.9mm body, 1.27mm lead pitch, gull-wing leads, RoHS-compliant matte tin finish. Thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1+) | Charge pump stage 1 input | Connects to VIN during first half-cycle; forms doubler node with C1 |
| 2 (+VOUT) | Positive regulated output | Delivers +2×VIN (unregulated); load current flows here |
| 3 (C1–) | Charge pump stage 1 return | Switched node tied to ground/C2+ during phase alternation |
| 4 (C2+) | Charge pump stage 2 input | Accepts doubled voltage from C1; drives inversion stage |
| 5 (C2–) | Charge pump stage 2 return | Switched node tied to +VOUT/GND during inversion phase |
| 6 (–VOUT) | Negative output | Delivers –2×VIN (unregulated); substrate reference point |
| 7 (VIN) | Positive input supply | Primary DC source; must remain ≥4V for functional operation |
| 8 (GND) | Analog ground reference | Common return for input, control logic, and capacitor networks |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor topology | Enables PCB space savings and EMI reduction vs. inductive DC/DC converters |
| Bipolar process immunity | Eliminates latchup risk under transient overvoltage or ESD stress |
| Single-supply dual-rail generation | Derives ±V from one 5V or 9V rail-ideal for portable instrumentation and interface ICs |
| Minimal external parts | Only four 1µF capacitors required-reduces BOM count and assembly cost |
| Wide input range | 4V–10V operation supports Li-ion, alkaline, and regulated 5V systems |
Applications
| RS232 Line Driver Power | Op Amp Bipolar Bias Supply |
|---|---|
Use Scenario: Generating ±5V to ±15V for RS232 transceivers (e.g., MAX232 replacement) from a 5V microcontroller rail. IC Role / Device Role / Timing Role: Voltage converter providing isolated dual-rail supply to driver ICs without transformer or inductor. Use Value: Enables full RS232 compliance (±5V min) using only 5V logic supply and four low-cost ceramics-no magnetics or layout complexity. | Use Scenario: Powering dual-supply operational amplifiers (e.g., LT1013, OP27) in data acquisition front-ends from a single 5V or 9V source. IC Role / Device Role / Timing Role: Unregulated dual-output charge pump supplying symmetric rails to precision analog signal chains. Use Value: Delivers stable ±7V at 10mA-sufficient for low-noise op amp biasing while avoiding thermal drift from linear regulators. |
| Battery Voltage Splitting | Industrial Sensor Interface |
Use Scenario: Splitting a 9V battery into ±4.5V rails for low-power sensor excitation and signal conditioning circuits. IC Role / Device Role / Timing Role: Efficient, low-quiescent converter enabling true bipolar sensing from single-cell or multi-cell batteries. Use Value: Maintains >±4V output at 5mA load down to 4V input-extends usable battery life beyond linear splitter limitations. | Use Scenario: Providing isolated ±12V rails for 4–20mA loop-powered transmitters or bridge sensor amplifiers in PLC I/O modules. IC Role / Device Role / Timing Role: Compact auxiliary supply generator supporting analog front-end ICs in space-constrained industrial enclosures. Use Value: Achieves ±16.8V at ±10mA with 10V input-meets industrial sensor bias requirements without custom winding or heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1054CS8#PBF | Integrated regulation, 100mA output, wider VIN (3.5V–15V), higher quiescent current (1.5mA) | Supports regulated ±5V/±12V at high current; unsuitable where ultra-low IQ or unregulated precision is needed | Select when stable voltage under varying load is mandatory; avoid if minimal IQ or simple doubling suffices |
| LTC1555ES5#TRMPBF | Step-up/step-down SIM power IC, 2.7V–10V input, integrated short-circuit/overtemp protection, SOT-23-5 | Designed for smart-card/SIM interfaces-not general-purpose dual-rail generation; limited output capability (±5V @ 10mA) | Choose only for dedicated SIM-level translation; not a functional substitute for LT1026IS8#TRPBF's flexible ±VOUT architecture |
Compared with LT1026IS8#TRPBF, LT1054CS8#PBF adds regulation and current capacity at the cost of complexity and IQ, while LTC1555ES5#TRMPBF trades versatility for integration in narrow-use cases-neither offers pin-compatible replacement nor identical unregulated charge-pump behavior.
Availability
LT1026IS8#TRPBF is available at Aetrix Electronics and suitable for RS232 power generation, op amp bipolar biasing, and industrial sensor interface applications requiring stable component supply across extended temperature ranges.
Supply support for LT1026IS8#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 its precision analog portfolio, including legacy switched-capacitor converters known for robustness and wide temp-range qualification.
The LT1026 product line was designed for inductorless dual-rail generation in space- and cost-constrained systems-targeting instrumentation, interface ICs, and portable analog signal chains where magnetic-free solutions are mandatory.
FAQ
What is the maximum output voltage achievable with LT1026IS8#TRPBF?
The LT1026IS8#TRPBF delivers up to ±18V output when VIN = 10V and load current is 0mA. At ±10mA load, typical output drops to ±16V/±15.3V. This unregulated behavior means output voltage scales linearly with input voltage and decreases under load-designers must verify rail margins at worst-case VIN and IL in their application.
Can LT1026IS8#TRPBF operate from a 3.3V input supply?
No, LT1026IS8#TRPBF requires a minimum 4V input supply per Absolute Maximum Ratings and Electrical Characteristics tables. Attempting 3.3V operation results in failure to start or unstable output-use LT1054 or LTC1555 for lower-input applications.
Is LT1026IS8#TRPBF pin-compatible with LT1026CS8#PBF?
Yes, LT1026IS8#TRPBF and LT1026CS8#PBF share identical 8-lead SOIC (S8) pinout, footprint, and terminal functions. The only difference is temperature grade: IS8 is –40°C to +85°C, CS8 is 0°C to +70°C. Both use the same marking "1026I" (IS8) or "1026" (CS8) and require identical external components.
Does LT1026IS8#TRPBF include short-circuit protection?
No, LT1026IS8#TRPBF has no internal short-circuit or overcurrent protection. Momentary shorts are tolerated, but sustained shorts cause thermal overload due to uncontrolled current flow. External current limiting or thermal monitoring is required in safety-critical designs.
What capacitor types and values are recommended for LT1026IS8#TRPBF?
LT1026IS8#TRPBF specifies 1µF ceramic or tantalum capacitors for C1, C2, +VOUT, and –VOUT. X7R ceramics are preferred for stability; values as low as 0.1µF work with reduced output current and increased ripple. For lowest ripple (<10mVP-P), use 22µF electrolytics or polymer caps-verified in TPC07.
LT1026IS8#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:
- 2
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 15mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1026IS8#TRPBF FAQ
1.How can I place an order for LT1026IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1026IS8#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 LT1026IS8#TRPBF reliable?
The price and inventory of LT1026IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1026IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1026IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1026IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1026IS8#TRPBF?
LT1026IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1026IS8#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 LT1026IS8#TRPBF?
For technical support, including LT1026IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1026IS8#TRPBF requirements.
6.How does Aetrix verify that LT1026IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1026IS8#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 LT1026IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1026IS8#TRPBF?
All LT1026IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1026IS8#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 LT1026IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1026IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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