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Analog Devices Inc. LT1301CN8#PBF
- Part No.:
- LT1301CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1301CN8#PBF.pdf
- Description:
- IC REG BOOST PROG 750MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:106
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Product details
Overview
LT1301CN8#PBF 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 LT1301CN8#PBF datasheet, LT1301CN8#PBF pinout, LT1301CN8#PBF application, or LT1301CN8#PBF equivalent, key selection criteria include input voltage range (1.8V min), shutdown current (10µA), output select logic (5V/12V), quiescent current (120µA), and SOIC-8/DIP-8 package compatibility for space-constrained designs.
Technical Context
The LT1301CN8#PBF employs a fixed-frequency burst-mode control architecture with a 155kHz oscillator and internal 1.25V reference. Its bipolar power switch enables low saturation voltage and high efficiency across wide load ranges, especially under micropower conditions where quiescent current remains at 120µA until output regulation requires switching.
Operation relies on two comparators: one monitors SENSE pin voltage against the 1.25V reference to enable/disable burst cycles, while the second (A2) compares ILIM-sensed voltage across an internal 3Ω resistor to enforce peak switch current limits-programmable from 400mA (ILIM grounded) to 1A (ILIM floating).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 6V - Enables operation from single Li-ion, two alkaline, or three NiMH cells without external LDO pre-regulation. |
| Output Voltage Options | 5V or 12V selectable via SEL pin - Eliminates need for external feedback resistors; supports dual-voltage systems like Flash memory programming and LCD bias rails. |
| Quiescent Current | 120µA typical - Minimizes battery drain during standby in always-on portable devices such as bar-code scanners and PDAs. |
| Shutdown Current | 10µA - Allows deep sleep mode with near-zero power draw when system is inactive. |
| Switch Saturation Voltage | 170mV at 1A - Reduces conduction loss by >75% vs prior-generation CMOS switches, directly improving efficiency at high load currents. |
| Oscillator Frequency | 155kHz typical - Permits use of compact, low-DCR surface-mount inductors (e.g., 33µH) without compromising EMI or transient response. |
| Peak Switch Current Limit | Programmable 400mA–1.25A via ILIM pin - Enables soft-start, inductor size reduction, and optimization for specific load profiles. |
Pinout & Package
LT1301CN8#PBF is housed in an 8-lead plastic DIP (N8) package, 0.300" wide, with through-hole mounting and industry-standard lead spacing. Pin 1 is GND, pin 8 is PGND - both must be tied together under the package for optimal thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Signal Ground Reference | Reference node for internal comparators and bias circuits; must be connected to PGND under package to minimize ground bounce. |
| SEL (Pin 2) | Output Voltage Select | Logic-controlled input: tied to VIN → 12V output; grounded/floating → 5V output; allows dynamic reconfiguration without hardware change. |
| SHDN (Pin 3) | Shutdown Control | Active-high enable: ≥1.8V disables switching and reduces supply current to 10µA; compatible with standard logic outputs. |
| SENSE (Pin 4) | Output Voltage Feedback | Connects to internal 1.25V reference divider; requires 0.1µF ceramic capacitor to ground for stable 5V operation. |
| ILIM (Pin 5) | Peak Current Limit Programming | Float → 1A limit; grounded → ~400mA limit; resistor-to-ground sets intermediate values - enables soft-start and inductor downsizing. |
| VIN (Pin 6) | Main Power Input | Accepts 1.8V–6V; requires local electrolytic bypass (≥47µF) within 0.2" of pin to suppress input ripple and prevent oscillation. |
| SW (Pin 7) | Switch Node | Drives external inductor/diode; high di/dt node - demands short, direct PCB trace to minimize EMI and voltage spikes. |
| PGND (Pin 8) | Power Ground Return | High-current return path for switch and input capacitor; must be tied to GND (Pin 1) under package to avoid ground loops. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode™ Operation | Maintains 78–89% efficiency down to 1mA load by gating full switching cycles instead of reducing frequency - critical for battery life in intermittent-use devices. |
| Integrated Bipolar Power Switch | 170mV VCE(SAT) at 1A eliminates external MOSFET driver and reduces board area/cost versus discrete boost controllers. |
| Programmable Output Voltage | Single-pin logic-selectable 5V/12V output avoids external resistor networks and simplifies BOM for multi-voltage systems. |
| ILIM Pin Programmability | Enables soft-start, peak current tuning, and inductor selection flexibility - supports design reuse across 30–200mA load variants. |
| Low Minimum Input Voltage | 1.8V operation extracts maximum energy from aging alkaline/NiMH cells, extending usable battery life by up to 25% vs 2.0V-min competitors. |
Applications
| Flash Memory VPP Generation | Palmtop Computer Power |
|---|---|
Use Scenario: Generating +12V programming voltage for NOR/NAND flash memory in embedded systems with 3.3V or 5V main rail. IC Role / Device Role / Timing Role: Step-up DC/DC converter providing regulated, low-noise VPP supply synchronized to write/erase commands. Use Value: Eliminates need for external charge pump or transformer-based solutions; achieves 89% efficiency at 120mA load with minimal component count. | Use Scenario: Supplying 5V auxiliary rail for SRAM backup, real-time clock, or I/O peripherals in handheld computing devices powered by two AA cells. IC Role / Device Role / Timing Role: Micropower boost regulator maintaining stable 5V output as battery voltage drops from 3.2V to 1.8V. Use Value: 120µA quiescent current extends standby time beyond 30 days; Burst Mode™ ensures no efficiency penalty at µA-level sleep currents. |
| Bar-Code Scanner Logic Supply | Portable Instrument LCD Bias |
Use Scenario: Powering 5V logic circuitry (decoder ASIC, laser driver, UART) in battery-operated handheld scanners using alkaline or Li-ion cells. IC Role / Device Role / Timing Role: Primary DC/DC converter delivering regulated 5V from variable input (2.0V–4.2V); dynamically enabled via SHDN during scan bursts. Use Value: 10µA shutdown current prevents battery drain between scans; 155kHz switching allows use of tiny 33µH inductors for compact form factor. | Use Scenario: Generating negative bias voltage (−5V to −29V) for LCD contrast control in portable test equipment with 1.8V–3.3V supply rails. IC Role / Device Role / Timing Role: Inverting boost converter configured with external transistor and transformer to produce adjustable negative output. Use Value: Programmable ILIM pin enables precise current limiting for safe transformer drive; 1.8V minimum input supports ultra-low-power instrument designs. |
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 |
|---|---|---|---|
| LT1300CS8#PBF | 3.3V/5V selectable output (not 12V); lower max output current (100mA); same 8-pin SOIC package. | Targeted at low-power logic rails only - unsuitable for flash VPP or higher-current LCD bias. | Select when 5V-only output and <100mA load are sufficient; offers identical footprint and layout compatibility. |
| LT1302CS8#PBF | Higher output power capability (up to 500mA); wider input range (1.5V–10V); same pinout but different ILIM behavior and oscillator frequency (125kHz). | Designed for heavier loads (e.g., motor drivers, RF modules); requires revised inductor/capacitor selection. | Choose for applications needing >200mA continuous output or operation below 1.8V input; verify thermal derating in DIP-8 package. |
Compared with LT1301CN8#PBF, LT1300CS8#PBF trades 12V capability and higher current for lower quiescent current in 5V-only roles, while LT1302CS8#PBF extends power delivery at the cost of increased complexity and reduced micropower efficiency - making LT1301CN8#PBF optimal for balanced 5V/12V, 120mA-class portable applications.
Availability
LT1301CN8#PBF is available at Aetrix Electronics and suitable for flash memory programming, portable instrumentation, and handheld scanning equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.
Supply support for LT1301CN8#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 its precision analog and power management product lines. Linear Technology was founded in 1981 and specialized in high-performance linear ICs and DC/DC converters.
The LT1301CN8#PBF belongs to Linear's micropower DC/DC converter family, designed specifically for battery-powered portable electronics where ultra-low quiescent current, small solution size, and dual-output flexibility are essential.
FAQ
What is the minimum input voltage required for LT1301CN8#PBF to regulate 5V output?
The LT1301CN8#PBF guarantees regulation down to 1.8V input across the commercial temperature range (0°C to 70°C). At 1.8V input, it delivers 5V at up to 120mA with typical efficiency of 78%. Below 1.8V, operation ceases - this threshold is specified in the Absolute Maximum Ratings table and confirmed in Figure G5 of the datasheet.
Can LT1301CN8#PBF generate 12V output from a 3.3V supply, and what efficiency is achieved?
Yes, the LT1301CN8#PBF delivers 12V from a 3.3V supply with up to 85% efficiency at 120mA load, as verified in Figure TA2 and Table 1 (Coilcraft DO3316-333 inductor). Efficiency remains above 80% from 10mA to full load due to low VCE(SAT) and Burst Mode™ optimization for light loads.
How does the ILIM pin function in LT1301CN8#PBF, and what resistor value sets 600mA peak switch current?
The ILIM pin on LT1301CN8#PBF programs peak switch current by sinking 15µA and developing a voltage across an external resistor to ground. A 10kΩ resistor yields ~600mA peak current, per Figure F8 and the ILIM functional description. This enables soft-start, inductor downsizing, and load-matched current limiting without modifying feedback or oscillator components.
Is LT1301CN8#PBF pin-compatible with LT1301CS8#PBF, and what are the key mechanical differences?
Yes, LT1301CN8#PBF (DIP-8) and LT1301CS8#PBF (SOIC-8) share identical pinout, electrical specifications, and thermal characteristics. The sole difference is package type: N8 is through-hole plastic DIP (0.300" width), while S8 is surface-mount SOIC (0.150" width). Both use the same die and operate identically - only PCB layout and assembly process differ.
What external components are mandatory for stable 5V operation of LT1301CN8#PBF?
For stable 5V operation, LT1301CN8#PBF requires: (1) a 0.1µF ceramic capacitor from SENSE (Pin 4) to GND, (2) ≥47µF electrolytic input capacitor from VIN (Pin 6) to PGND (Pin 8) placed within 0.2", and (3) a Schottky diode (e.g., 1N5817) and 33µH inductor connected to SW (Pin 7). Omitting the SENSE capacitor causes regulation instability and excessive output ripple.
LT1301CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1301CN8#PBF FAQ
1.How can I place an order for LT1301CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1301CN8#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 LT1301CN8#PBF reliable?
The price and inventory of LT1301CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1301CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1301CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1301CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1301CN8#PBF?
LT1301CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1301CN8#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 LT1301CN8#PBF?
For technical support, including LT1301CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1301CN8#PBF requirements.
6.How does Aetrix verify that LT1301CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1301CN8#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 LT1301CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1301CN8#PBF?
All LT1301CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1301CN8#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 LT1301CN8#PBF part is unused and in its original packaging.
Return procedure for LT1301CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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