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Analog Devices Inc. LT1301CS8#PBF
- Part No.:
- LT1301CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1301CS8#PBF.pdf
- Description:
- IC REG BOOST PROG 750MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:506
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Product details
Overview
LT1301CS8#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 LT1301CS8#PBF datasheet, LT1301CS8#PBF pinout, LT1301CS8#PBF application, or LT1301CS8#PBF equivalent, key selection criteria include input voltage range (1.8V min), quiescent current (120µA), shutdown current (10µA), output select logic (5V/12V), and SOIC-8 package compatibility with surface-mount inductor designs.
Technical Context
The LT1301CS8#PBF employs a fixed-frequency 155kHz oscillator driving a bipolar power switch with internal current sensing via a 3Ω sense resistor and 18mV trip threshold. Its Burst Mode™ operation disables switching when output regulation is met, reducing no-load current to 120µA while maintaining tight output voltage accuracy (±4% for 12V, ±5% for 5V).
Control architecture includes dual comparators: one for output regulation (1.25V reference + resistive divider on SENSE pin) and another for peak current limiting (monitored at ILIM pin). The SELECT pin configures output voltage by altering internal feedback ratio, and SHUTDOWN enables full device disable with 10µA supply current.
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 down to end-of-life voltage. |
| Output Voltage Options | Programmable 5V or 12V - selected via logic level on SELECT pin; no external resistors required. |
| Quiescent Current | 120µA typical - minimizes battery drain in standby, critical for palmtop computers and PDAs. |
| Shutdown Current | 10µA - allows system-level power gating without compromising battery shelf life. |
| Switch Saturation Voltage | 170mV at 1A - reduces conduction loss in boost path, improving efficiency over CMOS-switched converters. |
| Oscillator Frequency | 155kHz typical - permits use of small, low-DCR surface-mount inductors (e.g., 33µH) without excessive EMI. |
| Peak Switch Current Limit | 1.0A typical (ILIM floating) - sets maximum energy per cycle; adjustable to 400mA via ILIM-to-GND connection. |
Pinout & Package
LT1301CS8#PBF is housed in an 8-lead plastic SOIC (S8) package, 0.150" wide, with standard JEDEC MS-012AC footprint and RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Signal Ground Reference | Low-impedance return for internal bias circuits; must be tied to PGND under package to minimize noise coupling. |
| SEL (Pin 2) | Output Voltage Select Input | Logic-high (≥1.5V) selects 12V output; grounded or floating selects 5V output - enables dynamic voltage scaling. |
| SHDN (Pin 3) | Active-High Shutdown Control | Pull ≥1.8V to disable switching and reduce supply current to 10µA; safe to drive even with VIN floating. |
| SENSE (Pin 4) | Feedback Voltage Input | Connects to output divider network; requires 0.1µF ceramic capacitor to GND when regulating 5V to stabilize loop response. |
| ILIM (Pin 5) | Peak Current Limit Programming | Float for 1A limit; ground for ~400mA; resistor-to-ground sets intermediate values - enables soft-start and inductor downsizing. |
| VIN (Pin 6) | Main Power Input | Accepts 1.8V–6V; requires local 100µF electrolytic bypass within 0.2" of pin to suppress input ripple and prevent oscillation. |
| SW (Pin 7) | Switch Node Output | Drives external inductor and Schottky 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; must be tied to GND (Pin 1) under package to avoid ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode™ Operation | Maintains regulation at ultra-low load currents (µA range) while holding quiescent current to 120µA - extends battery life in intermittent-use devices. |
| Integrated Bipolar Power Switch | 170mV VCE(SAT) at 1A eliminates need for external MOSFET and gate driver - reduces BOM count and PCB area. |
| Programmable Output Voltage | Single-pin logic control (SEL) toggles between 5V and 12V outputs - supports dual-voltage systems (e.g., Flash VPP and logic rails) without redesign. |
| Adjustable Peak Switch Current | ILIM pin allows resistor-based setting of current limit from 400mA to 1A - enables optimization of inductor size, cost, and efficiency for specific load profiles. |
| 155kHz Fixed-Frequency Oscillator | Enables use of small, low-profile surface-mount inductors (e.g., 33µH) with minimal EMI filtering - simplifies layout for space-constrained portable designs. |
Applications
| Flash Memory VPP Generation | Palmtop Computer Power |
|---|---|
Use Scenario: Generating +12V programming voltage for NOR/NAND flash memory in embedded systems where main supply is 3.3V or 5V. IC Role / Device Role / Timing Role: Step-up DC/DC converter providing regulated, low-noise 12V output with fast transient response during write/erase cycles. Use Value: Eliminates need for separate high-voltage charge pump IC or transformer-based solution - reduces component count and board area by >40%. | Use Scenario: Supplying stable 5V rail to microcontroller, display controller, and peripheral interfaces in battery-powered palmtop PCs. IC Role / Device Role / Timing Role: Primary boost regulator managing dynamic load steps (e.g., LCD backlight on/off) while maintaining <100mV output droop. Use Value: 89% peak efficiency at 120mA and 120µA quiescent current extend usable runtime per battery charge by up to 35% vs. older CMOS-based converters. |
| Portable Instrumentation | PCMCIA Card Power |
Use Scenario: Powering analog front-end circuitry (ADCs, op-amps, sensors) in handheld test equipment operating from two AA cells. IC Role / Device Role / Timing Role: Micropower boost converter delivering clean 5V from 1.8V–3.0V input, supporting burst-mode sampling without supply sag. Use Value: 1.8V minimum input allows extraction of >90% of battery energy - increases instrument operational time between battery replacements. | Use Scenario: Providing isolated +12V and +5V supplies for PCMCIA Type II card interface logic and memory programming functions. IC Role / Device Role / Timing Role: Dual-output-capable boost converter enabling hot-swap compliant power sequencing via SHDN and SEL pins. Use Value: Programmable shutdown (10µA) and output select allow host system to dynamically manage card power states - meets PCMCIA 2.1 specification standby current limits. |
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 |
|---|---|---|---|
| LTC3525EDD#TRMPBF | CMOS synchronous rectification, 2MHz switching, 20µA quiescent current, but only 5V output (no 12V option) | Higher frequency allows smaller passives; unsuitable for flash VPP due to fixed 5V output | Select when ultra-low IQ and compact size outweigh need for 12V output. |
| MAX680ESA+ | Charge-pump topology, no inductor required, ±5V dual output, but limited to 100mA and 90% max efficiency | Inductorless design saves board space; cannot deliver 120mA at 12V with same efficiency | Select for low-noise, EMI-sensitive applications where 120mA/12V is not required. |
Compared with LTC3525EDD#TRMPBF and MAX680ESA+, the LT1301CS8#PBF uniquely combines programmable 5V/12V output, bipolar switch efficiency at high current, and proven reliability in battery-powered flash programming - making it irreplaceable in legacy portable designs requiring VPP generation.
Availability
LT1301CS8#PBF is available at Aetrix Electronics and suitable for flash memory programming, portable instrumentation, and PCMCIA card power applications requiring stable component supply across long-lifecycle industrial and medical programs.
Supply support for LT1301CS8#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 its precision analog and power management portfolio.
The LT1301CS8#PBF belongs to Linear's micropower DC/DC converter family, designed specifically for battery-operated portable electronics where extended runtime, small solution size, and reliable high-voltage generation are critical.
FAQ
What is the minimum input voltage supported by the LT1301CS8#PBF?
The LT1301CS8#PBF operates down to 1.8V input, enabling full functionality from partially discharged two-cell alkaline or NiMH batteries. This specification is guaranteed over the commercial temperature range (0°C to 70°C) and allows extraction of >90% of stored battery energy before shutdown - a key advantage in palmtop computers and bar-code scanners where battery life directly impacts usability.
How does the LT1301CS8#PBF achieve 89% peak efficiency?
The LT1301CS8#PBF achieves 89% peak efficiency through its integrated low-VCE(SAT) bipolar switch (170mV at 1A), 155kHz fixed-frequency operation that minimizes core losses in small inductors, and Burst Mode™ control that eliminates switching losses at light loads. Measured at 5V input, 12V/120mA output with Coilcraft DO3316-333 inductor, the LT1301CS8#PBF delivers this efficiency while maintaining <100mV output ripple - critical for noise-sensitive analog circuits.
Can the LT1301CS8#PBF generate both 5V and 12V outputs on the same board?
Yes, the LT1301CS8#PBF supports both 5V and 12V outputs via the SEL pin: tie SEL to VIN for 12V regulation, or ground/floating for 5V. No external feedback resistors are needed. In practice, this allows a single LT1301CS8#PBF design to serve dual-rail systems - for example, powering a microcontroller at 5V while simultaneously generating flash VPP at 12V using time-multiplexed SEL control.
What is the purpose of the ILIM pin on the LT1301CS8#PBF?
The ILIM pin on the LT1301CS8#PBF programs the peak switch current limit between ~400mA (ILIM grounded) and 1.0A (ILIM floating), enabling soft-start, inductor downsizing, and efficiency optimization. When used with a resistor to ground, it linearly scales the current limit - e.g., 10kΩ yields ~750mA - allowing precise matching to load requirements and minimizing I²R losses in the inductor and diode without redesigning the entire power stage.
Is the LT1301CS8#PBF RoHS-compliant and halogen-free?
Yes, the LT1301CS8#PBF is RoHS-compliant and halogen-free, with matte tin-plated leads and Pb-free solder reflow profile compatibility (JEDEC J-STD-020D). The "#PBF" suffix explicitly denotes lead-free packaging, and the device meets IPC/JEDEC J-STD-016 specifications for green materials - ensuring compliance for medical, industrial, and consumer products sold in EU, China, and other regulated markets.
LT1301CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1301CS8#PBF FAQ
1.How can I place an order for LT1301CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1301CS8#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 LT1301CS8#PBF reliable?
The price and inventory of LT1301CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1301CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1301CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1301CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1301CS8#PBF?
LT1301CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1301CS8#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 LT1301CS8#PBF?
For technical support, including LT1301CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1301CS8#PBF requirements.
6.How does Aetrix verify that LT1301CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1301CS8#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 LT1301CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1301CS8#PBF?
All LT1301CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1301CS8#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 LT1301CS8#PBF part is unused and in its original packaging.
Return procedure for LT1301CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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