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Analog Devices Inc. LT1301IN8#PBF
- Part No.:
- LT1301IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1301IN8#PBF.pdf
- Description:
- IC REG BOOST PROG 750MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,545
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Product details
Overview
LT1301IN8#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 oscillator for compact inductor sizing. Used in flash memory VPP generation and portable instrumentation requiring high efficiency at light loads.
For engineers reviewing the LT1301IN8#PBF datasheet, LT1301IN8#PBF pinout, LT1301IN8#PBF application, or LT1301IN8#PBF 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 compatibility with inexpensive surface-mount inductors in 8-lead DIP packaging.
Technical Context
The LT1301IN8#PBF employs a fixed-frequency (155kHz) burst-mode control architecture where the internal oscillator enables switching only when output voltage falls below regulation threshold, minimizing idle power loss. Its bipolar power switch features 170mV saturation voltage at 1A, enabling higher efficiency than CMOS-based converters under medium-to-high load conditions.
Regulation is achieved via a precision 1.25V internal reference and resistive feedback sensing at the SENSE pin, with 50mV hysteresis for stable burst cycling. Output voltage selection (5V or 12V) is controlled by the SEL pin logic state, while the ILIM pin allows external resistor programming of peak switch current between 400mA and 1.25A - directly affecting inductor size and light-load efficiency trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 6V - enables operation from two alkaline cells or single Li-ion cell with margin. |
| Output Voltage Options | Programmable 5V or 12V - selected by SEL pin logic level; supports flash memory VPP and LCD bias rails. |
| Quiescent Current | 120µA typical - ensures >1000-hour battery life in standby for palmtop computers and PDAs. |
| Shutdown Current | 10µA - reduces system-level leakage during sleep modes without external power gating. |
| Switch Saturation Voltage | 170mV at 1A - lowers conduction loss versus CMOS switches, improving efficiency above 50mA load. |
| Oscillator Frequency | 155kHz nominal - permits use of small 22–33µH surface-mount inductors (e.g., Coilcraft DO3316 series). |
| Peak Switch Current Limit | Programmable 0.4A to 1.25A via ILIM pin - enables optimization of inductor DCR and size for target load profile. |
Pinout & Package
LT1301IN8#PBF is housed in an 8-lead plastic DIP (N8) package with 0.300" wide body, compatible with through-hole assembly and prototyping breadboards. 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 connect to PGND under package to minimize ground bounce. |
| SEL (Pin 2) | Output Voltage Select | Logic-high (≥1.5V) selects 12V output; grounded or floating selects 5V output - enables dynamic rail switching. |
| SHDN (Pin 3) | Shutdown Control | Pull ≥1.8V to disable switching and reduce supply current to 10µA; valid even with VIN floating. |
| SENSE (Pin 4) | Feedback Input | Connects to output divider; requires 0.1µF ceramic capacitor to GND when regulating 5V to stabilize loop response. |
| ILIM (Pin 5) | Current Limit Programming | Resistor to GND sets peak switch current from 400mA to 1.25A; floating = 1A default for full-power operation. |
| VIN (Pin 6) | Main Supply Input | Accepts 1.8V–6V; requires local electrolytic bypass (≥47µF) within 0.2" of pin to suppress ripple-induced instability. |
| 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 (Pin 1) under IC body. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode™ Operation | Reduces no-load quiescent current to 120µA while maintaining tight output regulation across 1.8V–6V input range. |
| Low-VCE(SAT) Bipolar Switch | 170mV at 1A enables >89% peak efficiency - outperforming CMOS alternatives at medium loads (50–200mA). |
| Programmable Peak Switch Current | ILIM pin allows resistor-based adjustment from 400mA to 1.25A - supports smaller inductors and extended battery life in low-power applications. |
| 155kHz Internal Oscillator | Enables use of compact, low-DCR surface-mount inductors (e.g., 33µH Coilcraft DO3316) without external timing components. |
| Logic-Controlled Output Selection | SEL pin toggles between 5V and 12V outputs - eliminates need for external voltage-setting resistors or multiple regulators. |
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 supply. IC Role / Device Role / Timing Role: Step-up DC/DC converter providing regulated, low-noise 12V output with fast transient response to support flash write cycles. Use Value: Eliminates need for separate charge-pump IC or transformer-based solution; achieves 89% efficiency at 120mA load from 5V input. | Use Scenario: Supplying 5V auxiliary rail for microcontroller peripherals and display drivers in battery-powered palmtop PCs. IC Role / Device Role / Timing Role: Micropower boost converter operating from two AA cells (1.8V–3.2V), dynamically switching between 5V and 12V as needed. Use Value: 120µA quiescent current extends alkaline battery life beyond 1000 hours in standby; ILIM programming reduces inductor size by 40%. |
| Portable Instrumentation | Bar-Code Scanner Power |
Use Scenario: Providing isolated 12V bias for photodiode amplifiers and ADC reference buffers in handheld test equipment. IC Role / Device Role / Timing Role: High-efficiency boost regulator with low output ripple (<200mV p-p at 12V) and minimal EMI due to optimized SW node layout. Use Value: 170mV switch saturation voltage minimizes thermal rise in confined enclosures; 8-lead DIP simplifies manual rework and field calibration. | Use Scenario: Delivering 12V to laser diode driver circuitry in battery-operated bar-code scanners with intermittent duty cycle. IC Role / Device Role / Timing Role: Burst-mode DC/DC converter activated only during scan bursts, reducing average current draw during idle periods. Use Value: 10µA shutdown current prevents battery drain during scanner sleep; 155kHz switching avoids audible noise in consumer-facing devices. |
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 |
|---|---|---|---|
| LTC3429EDD#TRPBF | Higher 2MHz switching frequency; synchronous rectification; 20µA quiescent current; 12V output not supported. | Targets ultra-compact designs needing <1mm height; unsuitable for legacy 12V flash VPP requirements. | Select LTC3429EDD#TRPBF only if board space is critical and 5V-only output suffices. |
| MAX771CPA+ | CMOS-based; 300kHz oscillator; 250µA quiescent current; fixed 5V output; no SEL/ILIM pins. | Lacks programmable output voltage and current limit; lower efficiency above 100mA due to higher RDS(on). | Choose MAX771CPA+ only for cost-sensitive 5V-only applications where 120µA IQ is non-critical. |
Compared with LT1301IN8#PBF, LTC3429EDD#TRPBF offers superior light-load efficiency and smaller passive components but sacrifices 12V output capability and DIP package compatibility, while MAX771CPA+ provides pin-compatible 8-pin DIP form factor but lacks programmability and delivers lower efficiency at medium loads.
Availability
LT1301IN8#PBF is available at Aetrix Electronics and suitable for flash memory programming, portable instrumentation, and bar-code scanner power supplies requiring stable component supply across long-lifecycle industrial programs.
Supply support for LT1301IN8#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 full technical and manufacturing continuity for legacy Linear products including the LT1301 family.
The LT1301 product line was designed specifically for micropower, high-efficiency step-up conversion in battery-powered portable electronics - emphasizing low quiescent current, programmable output voltage, and robust operation down to 1.8V input.
FAQ
What is the minimum input voltage required for LT1301IN8#PBF to regulate 12V output?
The LT1301IN8#PBF guarantees operation down to 1.8V input, but to sustain 12V output under load, VIN must exceed ~2.5V depending on load current and inductor DCR. At 120mA output, 3.3V input delivers >85% efficiency; below 2.2V, regulation may drop out. Always verify with actual load and layout per Figure 1 in the LT1301IN8#PBF datasheet.
Can LT1301IN8#PBF be used to generate negative output voltages?
Yes - the LT1301IN8#PBF can configure as an inverting buck-boost converter to generate negative outputs such as –5V or –12V. Application Note 42 shows a validated 5V-to–5V circuit using LT1301IN8#PBF with external diode and inductor. Output polarity reversal requires re-routing SENSE and SW connections; efficiency drops ~5% versus standard boost mode.
How does the ILIM pin affect inductor selection for LT1301IN8#PBF?
The ILIM pin directly sets peak switch current: floating = 1A, grounded = 400mA, resistor-biased = intermediate value. For 1A operation, select inductors rated ≥1.25A saturation current (e.g., Coilcraft DO3316-333). At 400mA, smaller 10–22µH units with 500mA rating suffice - reducing board area by 30% and cost by 25% in low-power designs using LT1301IN8#PBF.
Is LT1301IN8#PBF RoHS compliant and lead-free?
Yes - LT1301IN8#PBF carries the #PBF suffix indicating lead-free (Pb-free) and RoHS-compliant construction per Analog Devices' specification. The N8 package uses matte tin lead finish, and all die attach, mold compound, and internal interconnects meet JEDEC J-STD-020 moisture sensitivity Level 3 requirements for LT1301IN8#PBF.
What is the purpose of the 0.1µF capacitor required on the SENSE pin for 5V operation of LT1301IN8#PBF?
The 0.1µF ceramic capacitor on the SENSE pin stabilizes the feedback loop during 5V regulation by compensating phase shift introduced by the internal error amplifier and external resistive divider. Omitting it causes oscillation or poor transient response - especially with low-ESR tantalum output capacitors. This capacitor is not required for 12V operation, as the higher output voltage inherently improves loop stability in LT1301IN8#PBF.
LT1301IN8#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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1301IN8#PBF FAQ
1.How can I place an order for LT1301IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1301IN8#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 LT1301IN8#PBF reliable?
The price and inventory of LT1301IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1301IN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1301IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1301IN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1301IN8#PBF?
LT1301IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1301IN8#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 LT1301IN8#PBF?
For technical support, including LT1301IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1301IN8#PBF requirements.
6.How does Aetrix verify that LT1301IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1301IN8#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 LT1301IN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1301IN8#PBF?
All LT1301IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1301IN8#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 LT1301IN8#PBF part is unused and in its original packaging.
Return procedure for LT1301IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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