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Analog Devices Inc. LT1301IS8#TRPBF
- Part No.:
- LT1301IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1301IS8#TRPBF.pdf
- Description:
- IC REG BOOST PROG 750MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,645
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Product details
Overview
LT1301IS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower step-up DC/DC converter with Burst Mode™ operation, delivering regulated 5V or 12V output from 1.8V–6V input. It integrates a low-VCE(SAT) bipolar switch (170mV at 1A), programmable peak current limit via ILIM pin, and 155kHz internal oscillator. Used in flash memory VPP generation and portable instrumentation requiring high efficiency at light loads.
For engineers reviewing the LT1301IS8#TRPBF datasheet, LT1301IS8#TRPBF pinout, LT1301IS8#TRPBF application, or LT1301IS8#TRPBF equivalent, key selection criteria include input voltage down to 1.8V, 120µA no-load quiescent current, shutdown current of 10µA, selectable 5V/12V output, and SOIC-8 package compatibility with surface-mount inductor designs.
Technical Context
The LT1301IS8#TRPBF employs a fixed-frequency (155kHz nominal) burst-mode control architecture with internal 1.25V reference and dual comparators for output regulation and current limiting. Its bipolar power switch enables efficient operation at ultra-low input voltages, while the ILIM pin directly programs peak switch current between 400mA (ILIM grounded) and 1A (ILIM floating).
Operation relies on sensing feedback at the SENSE pin through an external resistive divider; output voltage is selected by logic level on the SELECT pin (5V when grounded, 12V when tied to VIN). Shutdown disables switching and reduces total supply current to 10µA, with bias current into SHDN pin under 20µA at 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 6V - enables full operation from two alkaline cells or single Li-ion cell with headroom. |
| Output Voltage Options | Programmable 5V or 12V - selected via logic level on SELECT pin; no external resistor divider needed. |
| Quiescent Current | 120µA typical - minimizes battery drain in standby, critical for palmtop and PDA applications. |
| Shutdown Current | 10µA - allows deep sleep mode without removing input power. |
| Switch Saturation Voltage | 170mV at 1A - reduces conduction loss and improves efficiency over prior CMOS-based converters. |
| Oscillator Frequency | 155kHz typical - permits use of compact, low-DCR surface-mount inductors (e.g., 33µH). |
| Peak Switch Current Limit | Programmable 0.4A to 1.0A via ILIM pin - supports soft-start and optimized inductor sizing. |
| Efficiency | Up to 89% at 120mA - achieved with Schottky diode and low-ESR capacitors; higher than CMOS alternatives at medium load. |
Pinout & Package
LT1301IS8#TRPBF is housed in an 8-lead plastic SOIC package (S8), RoHS-compliant and rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Signal Ground Reference | Must be tied to PGND under package; forms reference for internal comparators and bias circuits. |
| SEL (Pin 2) | Output Voltage Select | Logic-low (≤0.8V) sets 5V output; logic-high (≥1.5V) or tie-to-VIN sets 12V output. |
| SHDN (Pin 3) | Shutdown Control | Pull ≥1.8V to disable switching; draws ≤20µA bias current; valid even with VIN floating. |
| SENSE (Pin 4) | Feedback Input | Connects to output divider node; requires 0.1µF ceramic capacitor to GND for 5V mode stability. |
| ILIM (Pin 5) | Current Limit Programming | Float = 1A trip; ground = 400mA trip; resistor to ground enables intermediate values (e.g., 10kΩ ≈ 800mA). |
| VIN (Pin 6) | Main Power Input | Accepts 1.8V–6V; must be bypassed with ≥47µF low-ESR capacitor within 0.2" of pin and PGND. |
| SW (Pin 7) | Switch Node | Drives external inductor/diode; layout must minimize trace length to reduce EMI and switching losses. |
| PGND (Pin 8) | Power Ground Return | High-current return path for switch and input capacitor; tie directly to GND under package. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode™ Operation | Maintains 120µA quiescent current across wide load range, enabling >100-hour battery life in low-duty-cycle instruments. |
| Integrated Bipolar Switch | 170mV VCE(SAT) at 1A reduces conduction loss by 4× vs. prior CMOS switches, improving mid-load efficiency. |
| Programmable Peak Current | ILIM pin allows precise setting of switch current limit (400mA–1A), enabling smaller inductors and controlled inrush during soft-start. |
| 155kHz Fixed Oscillator | Enables use of compact, low-cost 33µH surface-mount inductors (e.g., Coilcraft DO3316-333) without compromising regulation. |
| Logic-Controlled Output Selection | Single-pin SELECT interface eliminates external resistors or jumpers, simplifying BOM and supporting dynamic voltage reconfiguration. |
| Industrial Temperature Rating | Specified from –40°C to +85°C (LT1301I grade), ensuring reliable operation in portable test equipment and embedded controllers. |
Applications
| Flash Memory VPP Generation | Palmtop Computer Power |
|---|---|
Use Scenario: Generating +12V programming voltage for NOR/NAND flash memory erase/write cycles in handheld devices. IC Role / Device Role / Timing Role: Step-up DC/DC converter providing regulated, low-noise 12V output synchronized to memory command timing. Use Value: Eliminates need for separate charge-pump IC or external boost module; achieves 89% efficiency at 120mA with minimal board area. | Use Scenario: Supplying stable 5V rail for microcontroller, display controller, and peripheral I/O in battery-powered PDAs. IC Role / Device Role / Timing Role: Primary system power converter operating from 2-cell alkaline (3V) or Li-ion (3.7V) input. Use Value: 1.8V minimum input extends usable battery range; 120µA quiescent current preserves runtime during idle periods. |
| Portable Instrumentation | Bar-Code Scanner Power |
Use Scenario: Powering analog front-end, ADC, and laser driver in handheld multimeters or data loggers. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering clean 5V/12V rails with low ripple (<200mV) for precision signal chain. Use Value: Low VCE(SAT) and Burst Mode reduce thermal stress and extend battery life beyond 50 hours per set of AA cells. | Use Scenario: Providing 12V for laser diode bias and motor drive in cordless bar-code scanners. IC Role / Device Role / Timing Role: Compact, high-current boost stage supporting intermittent 120mA pulses during scan activation. Use Value: Programmable ILIM pin limits inrush current during motor startup, preventing brownout of host MCU supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1302CS8#TRPBF | Higher output current capability (up to 500mA), wider input range (1.5V–10V), same SOIC-8 package. | Required where sustained >120mA load or lower input voltage (<1.8V) is needed. | Choose LT1302CS8#TRPBF if load exceeds 120mA or input may dip below 1.8V; not drop-in due to different ILIM behavior and higher quiescent current (250µA). |
| TPS61040DRVR | CMOS-based, 28V max output, 1.8V–6V input, 28µA quiescent current, but only 280mA max output. | Better suited for ultra-low-IQ applications with lighter loads (<100mA); lacks bipolar switch efficiency at medium loads. | Choose TPS61040DRVR for longest battery life at <50mA loads; avoid for 120mA+ or 12V flash VPP where LT1301IS8#TRPBF's 89% efficiency and 1A switch are critical. |
Compared with LT1302CS8#TRPBF and TPS61040DRVR, the LT1301IS8#TRPBF delivers superior efficiency at 120mA with its bipolar switch and Burst Mode, occupies identical PCB footprint, and offers simpler ILIM programming-making it optimal for flash VPP and portable instrumentation where 120mA/12V is the design target.
Availability
LT1301IS8#TRPBF is available at Aetrix Electronics and suitable for flash memory programming, portable instrumentation, and bar-code scanner power supplies requiring stable component supply, long-term lifecycle support, and industrial-grade temperature performance.
Supply support for LT1301IS8#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 full technical and manufacturing continuity for legacy Linear products including the LT1301 series.
The LT1301IS8#TRPBF belongs to Linear's micropower DC/DC converter product line, designed specifically for battery-powered portable systems demanding high efficiency at light loads and robust operation down to 1.8V input.
FAQ
What is the minimum input voltage supported by the LT1301IS8#TRPBF?
The LT1301IS8#TRPBF operates down to 1.8V input, enabling full functionality from two alkaline cells (2.4V fresh, ~1.8V depleted) or single Li-ion cells with margin. This specification is guaranteed over the industrial temperature range (–40°C to +85°C) and is critical for maximizing battery utilization in portable instruments.
How does the ILIM pin function on the LT1301IS8#TRPBF?
The ILIM pin on the LT1301IS8#TRPBF programs peak switch current: floating sets 1A, grounding sets ~400mA, and a resistor to ground scales linearly (e.g., 10kΩ yields ~800mA). This feature enables soft-start, inductor downsizing, and reduced I²R losses-directly confirmed in the datasheet's Figure 3 and Electrical Characteristics table.
Can the LT1301IS8#TRPBF generate both 5V and 12V outputs?
Yes, the LT1301IS8#TRPBF supports dual output voltages: 5V when the SELECT pin is grounded or floating, and 12V when SELECT is tied to VIN. The output sense accuracy is ±4% (11.52V–12.48V for 12V mode; 4.75V–5.25V for 5V mode), verified in the Electrical Characteristics table at TA = 25°C.
What package type and temperature grade does the LT1301IS8#TRPBF use?
The LT1301IS8#TRPBF uses an 8-lead plastic SOIC package (S8) and is rated for the industrial temperature range of –40°C to +85°C (denoted by the "I" suffix). Package dimensions and lead finish comply with JEDEC MS-012, and the device is RoHS-compliant and halogen-free.
What is the typical quiescent current of the LT1301IS8#TRPBF in normal operation?
The LT1301IS8#TRPBF draws 120µA typical quiescent current under no-load conditions (VSHDN = 0.5V, VSEL = 5V, VSENSE = 5.5V), as specified in the Electrical Characteristics table. This value applies across the full industrial temperature range and is central to its micropower classification.
LT1301IS8#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:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 9.5V
- Voltage - Output (Min/Fixed):
- 5V, 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 750mA (Switch)
- Frequency - Switching:
- 155kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1301IS8#TRPBF FAQ
1.How can I place an order for LT1301IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1301IS8#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 LT1301IS8#TRPBF reliable?
The price and inventory of LT1301IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1301IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1301IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1301IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1301IS8#TRPBF?
LT1301IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1301IS8#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 LT1301IS8#TRPBF?
For technical support, including LT1301IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1301IS8#TRPBF requirements.
6.How does Aetrix verify that LT1301IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1301IS8#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 LT1301IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1301IS8#TRPBF?
All LT1301IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1301IS8#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 LT1301IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1301IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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