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Analog Devices Inc. LT1300CN8#PBF
- Part No.:
- LT1300CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1300CN8#PBF.pdf
- Description:
- IC REG BUCK BST PROG 220MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:152
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Product details
Overview
LT1300CN8#PBF from Analog Devices (formerly Linear Technology) is a micropower step-up DC/DC converter with Burst Mode™ operation, delivering up to 220mA at 5V from a 2V input. It features programmable 3.3V/5V output selection via logic-controlled SEL pin, 170mV typical switch saturation voltage at 1A, and 120µA no-load quiescent current. Used in battery-powered portable instruments and PCMCIA cards where low-voltage start-up and high efficiency are critical.
For engineers reviewing the LT1300CN8#PBF datasheet, LT1300CN8#PBF pinout, LT1300CN8#PBF application, or LT1300CN8#PBF equivalent, key selection criteria include input voltage range (1.8–6V), ILIM-programmable peak switch current (400mA–1.25A), 155kHz fixed-frequency oscillator, and compatibility with inexpensive 10µH surface-mount inductors in space-constrained DIP-8 layouts.
Technical Context
The LT1300CN8#PBF integrates a bipolar power switch with 170mV VCE(SAT) at 1A and uses a 155kHz internal oscillator to minimize external passive size. Its Burst Mode™ operation enables ultra-low 120µA quiescent current under light loads by disabling switching until output voltage drops below regulation threshold.
Output voltage is selected between 3.3V (SEL = GND) and 5V (SEL = VIN or VOUT) via an internal resistor divider referenced to a 1.25V bandgap. The ILIM pin sets peak switch current using an external resistor or direct grounding, enabling trade-offs between full-load capability and component cost/size in alkaline-battery applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 6V - enables full operation down to nearly-dead two-cell alkaline batteries. |
| Output Voltage Options | Programmable 3.3V (±3.5%) or 5V (±4%) - selectable via logic-level SEL pin without external resistors. |
| Max Output Current | 220mA at 5V from 2V input - sufficient for LCD bias, microcontroller peripherals, and low-power sensors. |
| Quiescent Current | 120µA typical at no load - extends battery life in standby mode of portable instruments. |
| Switch Saturation Voltage | 170mV typical at 700mA - reduces conduction loss and improves efficiency over prior-generation boost converters. |
| Oscillator Frequency | 155kHz typical - allows use of compact 10µH inductors (e.g., Coilcraft DO1608-103) without audible noise. |
| Shutdown Current | 10µA - cuts system leakage during deep sleep or battery removal. |
Pinout & Package
LT1300CN8#PBF is housed in an 8-lead plastic DIP (N8) package, through-hole mountable with 0.300-inch width and standard 0.100-inch pin pitch. Pin 1 is GND; pins 7 and 8 are SW and PGND respectively - requiring direct low-inductance connection to inductor and input capacitor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Signal Ground Reference | Return path for feedback and control circuitry; must be tied to PGND under IC body. |
| SEL (Pin 2) | Output Voltage Select Input | Logic-high (≥1.5V) selects 5V output; grounded selects 3.3V - no external components needed. |
| SHDN (Pin 3) | Active-High Shutdown Control | Pull ≥1.8V to disable switching and reduce supply current to 10µA; tie to GND for normal operation. |
| SENSE (Pin 4) | Output Voltage Feedback Node | Connects directly to regulated output; internal 1.25V reference compares against divided output voltage. |
| ILIM (Pin 5) | Peak Switch Current Programming | Float for 1A limit; ground for ~400mA; resistor-to-ground sets intermediate values (e.g., 10kΩ → ~700mA). |
| VIN (Pin 6) | Main Input Supply | Accepts 1.8–6V; requires local 0.1µF ceramic + bulk electrolytic bypassing within 0.2 inch of pin. |
| SW (Pin 7) | Internal Switch Collector | Drives external inductor/diode; layout must minimize trace length to reduce EMI and switching losses. |
| PGND (Pin 8) | Power Ground Return | High-current return for switch node; must be joined to GND (Pin 1) under package footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode™ Operation | Reduces no-load current to 120µA while maintaining tight output regulation across load transients. |
| ILIM-Programmable Peak Current | Enables use of smaller, lower-cost inductors (e.g., 10µH instead of 22µH) without sacrificing stability in light-load applications. |
| Low-Voltage Start-Up | Guaranteed operation from 1.8V input - extracts maximum energy from aging alkaline cells in handheld devices. |
| Integrated Bipolar Switch | 170mV VCE(SAT) at 1A eliminates need for external MOSFET driver and reduces BOM count versus discrete solutions. |
| Fixed 155kHz Oscillator | Eliminates external timing components and ensures predictable EMI profile for FCC/CE compliance in portable designs. |
Applications
| Bar-Code Scanners | PCMCIA Cards |
|---|---|
Use Scenario: Powering laser diode drivers and CCD image sensors from two AA cells in handheld scanning units. IC Role / Device Role / Timing Role: Step-up converter providing stable 5V rail for analog front-end and digital logic under varying battery discharge curves. Use Value: 88% efficiency at 200mA enables >8-hour runtime on alkaline batteries; Burst Mode™ extends shelf life during idle periods. | Use Scenario: Generating 3.3V or 5V from host bus voltage for memory card interface logic and flash programming circuits. IC Role / Device Role / Timing Role: Programmable-output DC/DC converter supporting dual-voltage PCMCIA standards without external resistor networks. Use Value: SEL pin simplifies firmware-controlled voltage selection; 120µA quiescent current meets PCMCIA Type II power-down requirements. |
| Portable Instruments | Battery Backup Supplies |
Use Scenario: Supplying 5V to precision ADCs, op-amps, and display drivers in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Micropower boost regulator maintaining regulation during battery voltage sag under measurement bursts. Use Value: 1.8V minimum input allows continued operation until battery reaches 0.9V/cell; low ripple supports 16-bit measurement accuracy. | Use Scenario: Providing hold-up power to SRAM or real-time clocks during main supply interruption in industrial controllers. IC Role / Device Role / Timing Role: Low-quiescent-current DC/DC converter sustaining backup rail from supercapacitors or coin cells. Use Value: 10µA shutdown current minimizes self-discharge; ILIM grounding limits inrush during capacitor recharge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1302CS8#PBF | Higher 600mA output current; same 1.8V min input; SO-8 only (no DIP option); 200µA IQ | Required when >220mA load current or PCB space constraints favor SOIC over DIP | Select LT1302CS8#PBF only if higher output current justifies increased quiescent current and package change. |
| MAX680ESA+ | Charge-pump topology (no inductor); fixed 5V output; 100mA max; 125µA IQ; 8-pin SO | Suitable only for ultra-low-noise, low-current applications where inductor EMI or size is unacceptable | Choose MAX680ESA+ only for sub-100mA loads where inductor-free design outweighs lower efficiency and fixed output. |
Compared with LT1300CN8#PBF, LT1302CS8#PBF delivers more current but sacrifices micropower advantage, while MAX680ESA+ avoids magnetics at the cost of output flexibility and current capability - making LT1300CN8#PBF optimal for 200mA-class battery-powered systems needing programmable voltage and DIP-8 fit.
Availability
LT1300CN8#PBF is available at Aetrix Electronics and suitable for portable instruments, bar-code scanners, and PCMCIA cards requiring stable component supply with long-term manufacturability and consistent electrical performance.
Supply support for LT1300CN8#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 support and manufacturing continuity for legacy Linear products including the LT1300 series.
The LT1300 belongs to Linear's micropower DC/DC converter product line, designed specifically for battery-operated portable equipment demanding high efficiency at ultra-low input voltages and minimal quiescent current.
FAQ
What is the minimum input voltage required for LT1300CN8#PBF to start switching?
The LT1300CN8#PBF guarantees operation down to 1.8V input, enabling full functionality even as two-cell alkaline batteries discharge to 0.9V per cell. Startup occurs reliably at this voltage with appropriate output capacitance and inductor selection, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet.
Can LT1300CN8#PBF generate both 3.3V and 5V outputs on the same board?
Yes, LT1300CN8#PBF supports both 3.3V and 5V outputs via its SEL pin: grounding SEL selects 3.3V (±3.5%), while connecting SEL to VIN or VOUT selects 5V (±4%). No external resistors or configuration jumpers are needed - the output voltage is determined solely by the logic level applied to Pin 2.
How does the ILIM pin affect inductor selection for LT1300CN8#PBF?
The ILIM pin on LT1300CN8#PBF directly programs peak switch current from ~400mA (ILIM grounded) to 1.25A (ILIM floating). Lower peak current allows use of smaller, lower-cost inductors like Coilcraft DO1608-103 (10µH, 0.11Ω DCR) instead of larger 22µH types, reducing board area and conduction loss in light-load applications.
What is the purpose of separate GND and PGND pins on LT1300CN8#PBF?
LT1300CN8#PBF separates signal ground (GND, Pin 1) from power ground (PGND, Pin 8) to isolate sensitive analog feedback paths from high-current switch return paths. They must be tied together under the IC body to prevent ground bounce and ensure stable regulation - a requirement explicitly stated in the Layout Considerations section of the datasheet.
Is LT1300CN8#PBF RoHS compliant and lead-free?
Yes, LT1300CN8#PBF carries the #PBF suffix indicating lead-free (Pb-free) and RoHS-compliant packaging. This designation confirms compliance with EU Directive 2011/65/EU and Analog Devices' environmental specifications, verified through material declarations and finish testing per J-STD-609.
LT1300CN8#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, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, Buck-Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 3.3V, 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 220mA
- Frequency - Switching:
- 155kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1300CN8#PBF FAQ
1.How can I place an order for LT1300CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1300CN8#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 LT1300CN8#PBF reliable?
The price and inventory of LT1300CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1300CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1300CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1300CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1300CN8#PBF?
LT1300CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1300CN8#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 LT1300CN8#PBF?
For technical support, including LT1300CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1300CN8#PBF requirements.
6.How does Aetrix verify that LT1300CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1300CN8#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 LT1300CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1300CN8#PBF?
All LT1300CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1300CN8#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 LT1300CN8#PBF part is unused and in its original packaging.
Return procedure for LT1300CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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