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Analog Devices Inc. LT1307BIS8#PBF
- Part No.:
- LT1307BIS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1307BIS8#PBF.pdf
- Description:
- IC REG BOOST ADJ 600MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,674
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Product details
Overview
LT1307BIS8#PBF from Analog Devices (formerly Linear Technology) is an industrial-grade, micropower, fixed-frequency 600kHz PWM boost DC/DC converter optimized for single-cell alkaline or NiMH battery operation down to 1V input. It delivers up to 75mA at 3.3V with continuous switching (no Burst Mode), 1mA quiescent current, and integrated low-battery detection (200mV threshold). It targets space-constrained portable medical and instrumentation systems requiring clean, ripple-free output under light loads.
For engineers reviewing the LT1307BIS8#PBF datasheet, LT1307BIS8#PBF pinout, LT1307BIS8#PBF application, or LT1307BIS8#PBF equivalent, key selection criteria include its 1V minimum input, absence of low-frequency output ripple, 295mV switch VCE(SAT) at 500mA, 1.22V feedback reference, and MSOP-8 package compatibility with high-density PCB layouts.
Technical Context
The LT1307BIS8#PBF implements a current-mode PWM architecture with a fixed 600kHz oscillator and no hysteresis in its error amplifier comparator-ensuring continuous switching across all load conditions. Its internal NPN power switch features 295mV VCE(SAT) at 500mA and supports duty cycles up to 84% at –40°C.
Unlike the LT1307 variant, the LT1307B disables Burst Mode entirely, eliminating sub-audio output ripple but increasing light-load quiescent current to 1mA. It integrates a precision 200mV low-battery detector with open-collector LBO output and operates across –40°C to +85°C with guaranteed specifications over the full range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1V to 5V - enables direct operation from single-cell batteries without pre-regulation. |
| Switching Frequency | 500–750kHz (typ. 600kHz) - permits use of compact 10µH inductors and 10µF ceramic output capacitors. |
| Feedback Reference | 1.22V ±20mV - sets regulated output voltage via external resistor divider (e.g., 3.3V = 1.22V × (1 + R1/R2)). |
| Quiescent Current | 1.0–1.8mA (industrial temp range) - defines baseline power draw when active but lightly loaded. |
| Switch VCE(SAT) | 250–400mV at 500mA - determines conduction loss and thermal rise in boost switch path. |
| Low-Battery Threshold | 186–210mV - triggers LBO output low when battery voltage drops below usable level for system shutdown. |
| Shutdown Current | 1–3µA - ensures near-zero system standby power when SHDN pin is grounded. |
Pinout & Package
LT1307BIS8#PBF is housed in an 8-lead MSOP (MS8) package, 3mm × 3mm × 0.85mm, with exposed pad for thermal enhancement. Pin 1 is VC (compensation), pin 2 is FB (feedback), pin 3 is SHDN (shutdown), pin 4 is GND, pin 5 is SW (switch), pin 6 is VIN (input supply), pin 7 is LBI (low-battery input), and pin 8 is LBO (low-battery output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Compensation node for error amplifier | Connects external RC network (e.g., 100kΩ + 680pF) to stabilize control loop; trace area must be minimized. |
| FB (Pin 2) | Feedback input | Senses output voltage via resistor divider; 1.22V reference enables precise regulation; sensitive to noise. |
| SHDN (Pin 3) | Enable/disable control | Must be tied ≥VIN to operate; grounded to shut down IC; floating causes erratic behavior. |
| GND (Pin 4) | Power and signal ground | Primary return path; requires direct connection to local ground plane to minimize noise coupling. |
| SW (Pin 5) | Switch node | Drives external inductor/diode; high di/dt demands short, low-inductance routing to reduce EMI. |
| VIN (Pin 6) | Main input supply | Requires 1µF ceramic bypass capacitor placed ≤5mm away; supports 1V–5V input range. |
| LBI (Pin 7) | Low-battery detector input | Accepts voltage between 0V and 700mV; referenced to internal 200mV threshold for battery monitoring. |
| LBO (Pin 8) | Low-battery open-collector output | Sinks 10µA max; requires external pull-up (e.g., 1MΩ) to generate logic-low alert signal. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous 600kHz switching | Eliminates low-frequency output ripple (<10kHz) common in Burst Mode converters, critical for noise-sensitive analog circuits. |
| 1V minimum input operation | Enables full functionality down to end-of-life battery voltage in single-cell alkaline/NiMH systems without brownout. |
| Integrated low-battery detector | 200mV threshold with ±14mV tolerance over –40°C to +85°C provides reliable early-warning battery depletion signaling. |
| MSOP-8 package with thermal pad | 3mm × 3mm footprint supports high-density portable designs; exposed pad improves thermal resistance to PCB. |
| 1.22V precision feedback reference | ±1.6% accuracy over temperature enables stable output regulation without trimming, reducing BOM count. |
Applications
| Glucose Meters | Portable Diagnostic Instruments |
|---|---|
Use Scenario: Battery-powered handheld device measuring blood glucose concentration with analog front-end and LCD display. IC Role / Device Role / Timing Role: Boost converter generating stable 3.3V rail from single AA/AAA cell for microcontroller, sensor bias, and display driver. Use Value: Continuous 600kHz operation prevents low-frequency ripple from interfering with precision ADC measurements and analog signal integrity. |
Use Scenario: Field-deployable point-of-care analyzer performing electrochemical or optical assays. IC Role / Device Role / Timing Role: Primary power regulator supplying 3.3V/5V rails to mixed-signal SoC, transimpedance amplifiers, and communication interfaces. Use Value: 1V start-up and 1mA quiescent current extend usable battery life while maintaining regulation through full discharge curve. |
| Pagers | Battery Backup Systems |
Use Scenario: Legacy two-way messaging device with RF receiver, LED indicators, and vibration motor. IC Role / Device Role / Timing Role: High-efficiency boost stage powering RF IC and baseband processor from single-cell supply. Use Value: MSOP-8 package and ceramic capacitor compatibility enable ultra-thin form factor without electrolytic bulk capacitance. |
Use Scenario: SRAM or real-time clock backup circuit maintaining volatile memory during main power loss. IC Role / Device Role / Timing Role: Low-quiescent boost converter sustaining 3.3V rail from depleted primary battery or supercapacitor. Use Value: Shutdown current <3µA and 200mV LBI threshold ensure minimal drain on backup energy source during extended hold-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1307IS8#PBF | Includes Burst Mode operation; 50µA quiescent current vs. 1mA; same pinout and package. | Preferred where ultra-low light-load power dominates over output ripple concerns (e.g., intermittent sensor logging). | Select LT1307IS8#PBF only if system can tolerate ~5kHz low-frequency output ripple and prioritizes battery longevity over analog noise floor. |
| TPS61200DRCT | Fixed 500kHz frequency; 1.8V–5.5V input; 1.2V feedback reference; 55µA IQ; different pinout (QFN-10). | Requires PCB redesign; lacks integrated low-battery detector; better suited for higher-input systems with tighter voltage margins. | Choose TPS61200DRCT only when migrating to newer TI platform with QFN layout and no need for LBI/LBO functionality. |
Compared with LT1307IS8#PBF, the LT1307BIS8#PBF trades 20× higher light-load IQ for ripple-free output; compared with TPS61200DRCT, it offers integrated battery monitoring and MSOP-8 drop-in compatibility but requires manual compensation tuning.
Availability
LT1307BIS8#PBF is available at Aetrix Electronics and suitable for portable medical devices, battery-backed instrumentation, handheld diagnostics, and low-power wireless sensors requiring stable component supply across industrial temperature ranges.
Supply support for LT1307BIS8#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 power products.
The LT1307/LT1307B family was designed specifically for micropower, single-cell boost conversion in portable instrumentation and medical electronics where input voltage headroom is severely constrained.
FAQ
What is the minimum input voltage required for LT1307BIS8#PBF to start and regulate?
The LT1307BIS8#PBF guarantees operation down to 1.0V input across the industrial temperature range (–40°C to +85°C), with typical start-up occurring at 0.92V. At –40°C, the minimum functional input rises to 1.1V per datasheet specifications, ensuring reliable cold-weather performance in portable medical devices.
Does LT1307BIS8#PBF support Burst Mode operation like the LT1307 variant?
No, the LT1307BIS8#PBF does not implement Burst Mode. Its error amplifier comparator lacks hysteresis, forcing continuous 600kHz switching regardless of load. This eliminates low-frequency output ripple but increases light-load quiescent current to 1mA versus 50µA for the LT1307IS8#PBF.
What is the function of the LBI and LBO pins on LT1307BIS8#PBF?
The LBI (Pin 7) accepts a voltage derived from the battery via a resistor divider; when that voltage falls below 200mV (186–210mV over temperature), the open-collector LBO (Pin 8) pulls low to signal low battery condition. An external 1MΩ pull-up resistor is required on LBO to generate a logic-high signal when battery is healthy.
Can LT1307BIS8#PBF be used to generate 5V output from a single cell?
Yes, the LT1307BIS8#PBF supports 5V output using the standard boost configuration. The feedback divider must be recalculated: for 5V output, use R1 = 1.0MΩ and R2 = 329kΩ (1%) to set VOUT = 1.22V × (1 + R1/R2). Efficiency remains >75% at 10mA load with 1.25V input.
What package type and thermal characteristics apply to LT1307BIS8#PBF?
The LT1307BIS8#PBF uses the 8-lead MSOP (MS8) package with θJA = 120°C/W. Its exposed thermal pad must be soldered to a copper pour for optimal heat dissipation. Maximum junction temperature is 125°C, and the device is rated for continuous operation across –40°C to +85°C with full parameter guarantees.
LT1307BIS8#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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- 30V (Switch)
- Current - Output:
- 600mA (Switch)
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1307BIS8#PBF FAQ
1.How can I place an order for LT1307BIS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1307BIS8#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 LT1307BIS8#PBF reliable?
The price and inventory of LT1307BIS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1307BIS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1307BIS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1307BIS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1307BIS8#PBF?
LT1307BIS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1307BIS8#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 LT1307BIS8#PBF?
For technical support, including LT1307BIS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1307BIS8#PBF requirements.
6.How does Aetrix verify that LT1307BIS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1307BIS8#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 LT1307BIS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1307BIS8#PBF?
All LT1307BIS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1307BIS8#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 LT1307BIS8#PBF part is unused and in its original packaging.
Return procedure for LT1307BIS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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