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Analog Devices Inc. LT1307BIS8#TRPBF
- Part No.:
- LT1307BIS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1307BIS8#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 600MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,043
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Product details
Overview
LT1307BIS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, fixed-frequency 600kHz PWM boost DC/DC converter optimized for single-cell lithium or alkaline battery operation. It delivers up to 75mA at 3.3V from 1.0V input, features 1mA quiescent current, continuous switching (no Burst Mode), and integrated low-battery detection with 200mV threshold. It is used in glucose meters and portable diagnostic instrumentation where low-noise, ripple-free output under light load is critical.
For engineers reviewing the LT1307BIS8#TRPBF datasheet, LT1307BIS8#TRPBF pinout, LT1307BIS8#TRPBF application, or LT1307BIS8#TRPBF equivalent, key selection criteria include its 1mA no-load IQ, absence of low-frequency output ripple, 600kHz fixed switching frequency, 200mV LBI threshold, and MSOP-8 package compatibility with space-constrained medical and handheld devices.
Technical Context
The LT1307BIS8#TRPBF implements a current-mode PWM control architecture with a 600kHz oscillator and internal NPN power switch (VCESAT = 295mV @ 500mA). Unlike the LT1307, it omits hysteresis in the error amplifier comparator, eliminating Burst Mode and ensuring continuous switching down to light loads - critical for noise-sensitive applications like glucose sensing.
It integrates a precision 200mV low-battery detector (LBI/LBO) with open-collector output and supports external RC compensation on the VC pin for loop stability. Feedback regulation uses a 1.22V reference (±1% over temperature), enabling accurate output voltage setting via resistor divider (e.g., 3.3V or 5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.0V to 5.0V - enables direct operation from single-cell batteries including discharged alkaline (down to ~0.92V min start) |
| Quiescent Current | 1.0mA (typ) - defines baseline power draw when regulating light loads; higher than LT1307 but eliminates Burst Mode ripple |
| Switching Frequency | 600kHz (typ) - allows use of small 10µH inductors and 10µF ceramic output capacitors, reducing board area and EMI filtering complexity |
| Feedback Reference | 1.22V ±1% - sets output voltage accuracy; VOUT = 1.22V × (1 + R1/R2); stable over –40°C to +85°C industrial range |
| Low-Battery Threshold | 200mV ±10mV - precise undervoltage detection for battery monitoring; LBO sinks 10µA when LBI < 200mV |
| Power Switch VCESAT | 295mV @ 500mA - low conduction loss improves efficiency at medium loads; enables >85% efficiency at 10mA–100mA range |
| Shutdown Current | 3µA (max) - ultra-low off-state leakage preserves battery life during system sleep |
Pinout & Package
LT1307BIS8#TRPBF is housed in an 8-lead plastic MSOP (MS8) package, 3mm × 3mm × 0.85mm, with exposed pad for thermal performance. Pin pitch is 0.65mm; recommended reflow profile complies with JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Compensation node for error amplifier | Connect external RC network (e.g., 100kΩ + 680pF) to ground; determines loop stability and transient response |
| FB (Pin 2) | Feedback input | Monitors output via resistor divider; 1.22V reference sets regulation point; bias current < 100nA minimizes divider error |
| SHDN (Pin 3) | Enable/disable control | Pull to GND to disable; tie to VIN or higher to enable; floating causes erratic behavior - must be actively driven |
| GND (Pin 4) | Power and signal reference | Direct connection to local ground plane required; separates analog and power return paths for noise control |
| SW (Pin 5) | Switch node | Drives external inductor/diode; high di/dt demands short, low-inductance trace routing to minimize EMI and ringing |
| VIN (Pin 6) | Main supply input | Accepts 1.0V–5.0V; requires 1µF ceramic bypass capacitor placed ≤5mm away to suppress switching transients |
| LBI (Pin 7) | Low-battery detector input | High-impedance input referenced to 200mV; voltage between 0V–0.7V; bias current < 30nA enables high-resistor divider |
| LBO (Pin 8) | Low-battery open-collector output | Sinks 10µA when LBI < 200mV; requires external pull-up (e.g., 1MΩ) to monitor battery status or trigger MCU interrupt |
Key Features
| Feature | Design Value |
|---|---|
| Continuous 600kHz switching | Eliminates low-frequency Burst Mode ripple (<10kHz), essential for analog signal chains in medical sensors |
| 1.0V minimum start-up voltage | Enables full functionality from deeply discharged single-cell batteries, extending usable battery life in portable devices |
| Integrated 200mV low-battery detector | Provides system-level battery health monitoring without external comparators or references - reduces BOM count and layout area |
| MSOP-8 package with thermal pad | Supports high power density designs; θJA = 120°C/W enables 75mA output in compact footprint without heatsinking |
| External RC compensation | Allows tuning of transient response and stability across varying input/output conditions and capacitor ESR |
Applications
| Glucose Monitoring Systems | Portable Diagnostic Instruments |
|---|---|
Use Scenario: Battery-powered handheld glucose meter operating from a single AAA alkaline cell with strict EMC and analog noise requirements. IC Role / Device Role / Timing Role: Primary 3.3V rail generator; supplies ADC, microcontroller, and electrochemical sensor interface with clean, ripple-free voltage. Use Value: Continuous 600kHz operation avoids Burst Mode-induced 5–10kHz ripple that would corrupt low-level amperometric current measurements. | Use Scenario: Portable blood analyzer requiring stable 3.3V/5V rails for optical detectors and precision analog front-end during field use. IC Role / Device Role / Timing Role: Micropower boost converter providing regulated output while preserving battery runtime; LBO signals end-of-life to host MCU. Use Value: 1mA quiescent current and 3µA shutdown current maximize battery life; 200mV LBI threshold enables accurate remaining capacity estimation. |
| Cordless Medical Telemetry Devices | Low-Power Wearable Sensors |
Use Scenario: Bluetooth-enabled ECG patch powered by coin cell, transmitting data intermittently while maintaining sensor bias stability. IC Role / Device Role / Timing Role: Always-on 3.3V supply for RF SoC and analog sensor conditioning; operates continuously during transmit/receive bursts. Use Value: Absence of low-frequency switching artifacts prevents interference with narrowband RF reception and analog signal integrity. | Use Scenario: Disposable wearable patch monitoring tissue oxygenation using photoplethysmography (PPG) with minimal size and weight constraints. IC Role / Device Role / Timing Role: Single-cell boost regulator powering LED drivers and transimpedance amplifier; compensates for battery voltage sag during LED pulses. Use Value: 1.0V start-up and 600kHz fixed frequency ensure consistent LED drive timing and SNR across full battery discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1307IS8#TRPBF | Includes Burst Mode; 50µA quiescent current; same pinout and package | Higher light-load efficiency but introduces 5–50kHz output ripple; unsuitable for noise-critical analog circuits | Select when battery life > noise performance; verify ripple tolerance in signal chain |
| TPS61200DRCR | 200mA switch current; 0.9V start-up; 1.2MHz switching; different pinout (10-pin WSON) | Higher output current capability and smaller inductor size; lacks integrated low-battery detector | Select for higher load (>75mA) or tighter board area; requires external UVLO circuit |
Compared with LT1307IS8#TRPBF, the LT1307BIS8#TRPBF trades 950µA higher quiescent current for ripple-free regulation - critical in medical analog front-ends. Versus TPS61200DRCR, it offers integrated battery monitoring and lower EMI at 600kHz but lower current capability and non-pin-compatible layout.
Availability
LT1307BIS8#TRPBF is available at Aetrix Electronics and suitable for glucose meters, portable diagnostic instrumentation, cordless medical telemetry devices, and low-power wearable sensors requiring stable component supply across long production lifecycles.
Supply support for LT1307BIS8#TRPBF 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 LT1307 family.
The LT1307B series belongs to Linear's micropower DC/DC converter product line, designed specifically for battery-operated medical, portable, and instrumentation applications demanding ultra-low IQ, wide input range, and clean output regulation.
FAQ
What is the minimum input voltage required for LT1307BIS8#TRPBF to start switching?
The LT1307BIS8#TRPBF guarantees start-up at 1.0V input voltage across the industrial temperature range (–40°C to +85°C), with typical operation beginning as low as 0.92V. This enables reliable operation from single-cell alkaline or lithium batteries even near end-of-life, making LT1307BIS8#TRPBF well-suited for long-duration portable medical devices where battery voltage decay is gradual.
Does LT1307BIS8#TRPBF enter Burst Mode at light loads like the LT1307?
No, LT1307BIS8#TRPBF does not enter Burst Mode operation. Its internal comparator lacks hysteresis, forcing continuous 600kHz switching regardless of load - eliminating low-frequency output ripple. This is a deliberate design distinction from the LT1307, and LT1307BIS8#TRPBF maintains constant frequency down to zero load, trading 950µA higher quiescent current for superior noise performance.
What is the purpose of the LBI and LBO pins on LT1307BIS8#TRPBF?
The LBI (Low-Battery Input) and LBO (Low-Battery Output) pins implement an integrated undervoltage detection circuit with a precise 200mV threshold. LBI accepts a scaled battery voltage; when it falls below 200mV, LBO pulls low (sinking 10µA). This allows LT1307BIS8#TRPBF to provide battery health signaling without external components - a key feature for compact medical devices where PCB area and BOM count are constrained.
Can LT1307BIS8#TRPBF generate a 5V output from a 1.5V input?
Yes, LT1307BIS8#TRPBF can generate 5V from a 1.5V input using an external resistor divider on the FB pin. The datasheet specifies R1 = 1.0MΩ and R2 = 329kΩ for 5V output. Efficiency remains >80% at 10–50mA loads, and the fixed 600kHz frequency ensures predictable inductor sizing and EMI behavior - confirmed in Figure 1 and Table 1 of the LT1307BIS8#TRPBF datasheet.
What package type and thermal characteristics does LT1307BIS8#TRPBF use?
LT1307BIS8#TRPBF uses the 8-lead plastic MSOP (MS8) package with exposed thermal pad. Its thermal resistance is θJA = 120°C/W (JEDEC standard board), enabling reliable operation at 75mA output current without additional heatsinking. The compact 3mm × 3mm footprint and 0.65mm pitch make it suitable for high-density medical PCBs where space is at a premium - consistent with the industrial-grade rating of the LT1307BIS8#TRPBF variant.
LT1307BIS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT1307BIS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1307BIS8#TRPBF 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#TRPBF reliable?
The price and inventory of LT1307BIS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1307BIS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1307BIS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1307BIS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1307BIS8#TRPBF?
LT1307BIS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1307BIS8#TRPBF 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#TRPBF?
For technical support, including LT1307BIS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1307BIS8#TRPBF requirements.
6.How does Aetrix verify that LT1307BIS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1307BIS8#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1307BIS8#TRPBF?
All LT1307BIS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1307BIS8#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LT1307BIS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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