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Analog Devices Inc. LT1307BCMS8#PBF
- Part No.:
- LT1307BCMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1307BCMS8#PBF.pdf
- Description:
- IC REG BOOST ADJ 600MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:122
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Product details
Overview
LT1307BCMS8#PBF from Analog Devices (formerly Linear Technology) is a 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 or 50mA at 5V with 500mA internal NPN switch (VCESAT = 295mV @ 500mA), operates without electrolytic capacitors using only 1µF input and 10µF ceramic output capacitance, and features integrated low-battery detection (200mV threshold) and shutdown (<3µA). It is used in glucose meters, GPS receivers, and portable medical instrumentation requiring stable low-noise 3.3V/5V rails from depleted batteries.
For engineers reviewing the LT1307BCMS8#PBF datasheet, LT1307BCMS8#PBF pinout, LT1307BCMS8#PBF application, or LT1307BCMS8#PBF equivalent, key selection criteria include its 1V minimum input, 600kHz switching frequency enabling small MLCCs, absence of Burst Mode (vs. LT1307), 1mA quiescent current, and MSOP-8 package compatibility with space-constrained handheld devices.
Technical Context
The LT1307BCMS8#PBF implements a current-mode PWM architecture with fixed 600kHz oscillator and no hysteresis in the error amplifier comparator-ensuring continuous switching even at light loads to eliminate low-frequency output ripple. Its internal NPN power switch supports 500mA peak current with 295mV saturation voltage, and the feedback loop uses a precise 1.22V reference (±1.6% over temperature) with external resistor divider for output voltage setting.
Unlike the LT1307, the LT1307B variant disables Burst Mode operation entirely, trading light-load efficiency (1mA IQ vs. 50µA) for clean, ripple-free regulation critical in sensitive analog signal chains. The low-battery detector provides a 200mV reference input (LBI) and open-collector output (LBO) with 10µA sink capability, enabling system-level battery monitoring without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1V to 5V - enables direct operation from single-cell alkaline/NiMH batteries down to end-of-life voltage. |
| Switching Frequency | 600kHz (typ.) - allows use of tiny surface-mount inductors (e.g., 10µH) and ceramic capacitors instead of bulky electrolytics. |
| Quiescent Current | 1.0mA (typ.) - defines baseline power draw when active but unloaded; higher than LT1307 but eliminates Burst Mode ripple. |
| Feedback Reference Voltage | 1.22V ±1.6% - sets output voltage via external resistor divider (VOUT = 1.22V × (1 + R1/R2)); stable across –40°C to 85°C. |
| Switch VCESAT | 295mV @ 500mA - limits conduction loss in boost path; enables >85% efficiency at 10–100mA loads with 1.25V input. |
| Low-Battery Threshold | 200mV ±5mV - triggers LBO output when battery voltage drops below usable level; supports accurate state-of-charge monitoring. |
| Shutdown Current | 3µA (max) - ensures minimal battery drain during system sleep; SHDN pin must be pulled ≥VIN to enable. |
Pinout & Package
LT1307BCMS8#PBF is housed in an 8-lead MSOP (Mini Small Outline Package) with 0.65mm lead pitch, thermally enhanced for high-power density in portable designs. The package meets JEDEC MO-187AA standards and supports reflow soldering per IPC/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 stabilize feedback loop; trace area must be minimized to reduce noise coupling. |
| FB (Pin 2) | Feedback input | Monitors output voltage via resistor divider; 1.22V reference sets regulation point; high-impedance node (27nA bias current) requires short, shielded routing. |
| SHDN (Pin 3) | Enable/disable control | Pull to GND to disable IC (IQ < 3µA); tie to VIN or higher to enable; floating state causes erratic behavior and must be avoided. |
| GND (Pin 4) | Power and signal ground | Primary return path for switch current and analog circuitry; must connect directly to local ground plane with low-inductance layout. |
| SW (Pin 5) | Switch node | Drives external inductor/diode; carries high di/dt current; requires shortest possible trace to minimize EMI and voltage spikes. |
| VIN (Pin 6) | Main power input | Accepts 1V–5V supply; requires 1µF ceramic bypass capacitor placed ≤5mm away to suppress high-frequency noise. |
| LBI (Pin 7) | Low-battery detector input | High-impedance input referenced to 200mV; voltage between 0V and 700mV determines LBO state; bias current flows out (5–30nA). |
| LBO (Pin 8) | Low-battery detector output | Open-collector NPN output; sinks up to 10µA; requires external 1MΩ pull-up to define logic-high level for microcontroller monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| 600kHz fixed-frequency PWM | Enables use of compact 10µH inductors and 10µF ceramic output capacitors-eliminating large electrolytics and reducing board area by >50% vs. 100kHz converters. |
| No Burst Mode operation | Ensures continuous switching at all load levels, removing low-frequency (kHz-range) output ripple that interferes with ADCs, RF receivers, and precision analog circuits. |
| 1V minimum input voltage | Extends usable battery life in single-cell systems-supports operation down to ~0.92V input, capturing energy from nearly depleted alkaline cells. |
| Integrated low-battery detector | Provides system-level battery monitoring with 200mV threshold and open-collector LBO output-no external comparator or reference required. |
| MSOP-8 thermal performance | θJA = 160°C/W enables 500mA switch current handling in compact footprint; suitable for sealed portable enclosures without forced airflow. |
Applications
| Glucose Meters | GPS Receivers |
|---|---|
Use Scenario: Portable handheld device measuring blood glucose concentration using electrochemical test strips powered by a single AA alkaline cell. IC Role / Device Role / Timing Role: Boost converter generating stable 3.3V rail for microcontroller, LCD, and analog front-end from 1.0–1.5V battery input. Use Value: Continuous 600kHz operation prevents Burst Mode ripple from corrupting low-level sensor signals; 1V start-up ensures full functionality until battery reaches 0.92V. | Use Scenario: Battery-powered GPS module in asset trackers or wearable navigation devices operating on single-cell NiMH. IC Role / Device Role / Timing Role: Supplies regulated 3.3V to GPS baseband processor and RF front-end while maintaining low EMI in RF-sensitive environment. Use Value: Absence of low-frequency ripple avoids interference with 1.575GHz GPS L1 band reception; ceramic-only BOM reduces size and improves shock resistance. |
| Portable Medical Diagnostics | Wireless Sensor Nodes |
Use Scenario: Handheld diagnostic instrument performing optical or impedance measurements with sub-mV accuracy. IC Role / Device Role / Timing Role: Powers precision analog signal chain (op-amps, ADCs, references) from single-cell battery with ultra-low noise output. Use Value: No Burst Mode eliminates 1–10kHz spectral sidebands near sensitive measurement bands; 1.22V FB reference stability (±1.6%) ensures consistent gain calibration. | Use Scenario: Long-life IoT sensor node transmitting temperature/humidity data via BLE or LoRa using coin-cell or AA battery. IC Role / Device Role / Timing Role: Generates 3.3V system rail during brief transmit bursts while minimizing average current draw between transmissions. Use Value: 1mA quiescent current balances low-noise operation with battery longevity; shutdown mode draws <3µA to extend multi-year deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1307CMS8#PBF | Includes Burst Mode operation; 50µA quiescent current; same pinout and package. | Preferred where ultra-low IQ is critical and low-frequency ripple is acceptable (e.g., non-analog digital-only loads). | Select LT1307CMS8#PBF only if light-load efficiency outweighs ripple sensitivity; not drop-in due to different dynamic behavior. |
| TPS61200DRCR | 2.5V–5.5V input range; 1.2MHz switching; integrated 1.3A switch; no low-battery detector. | Suitable for higher-input systems (e.g., Li-ion or dual-cell); lacks LBI/LBO pins for battery monitoring. | Choose TPS61200DRCR when input exceeds 1.5V and higher output current (>100mA) is needed; requires redesign of feedback and protection circuitry. |
Compared with LT1307CMS8#PBF, the LT1307BCMS8#PBF sacrifices 20× higher quiescent current to eliminate Burst Mode ripple-making it superior for analog-signal integrity. Versus TPS61200DRCR, it offers lower minimum input (1V vs. 2.5V) and integrated battery monitoring but lower output current capability.
Availability
LT1307BCMS8#PBF is available at Aetrix Electronics and suitable for glucose meters, GPS receivers, portable medical diagnostics, and wireless sensor nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LT1307BCMS8#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 product support, documentation, and manufacturing continuity for legacy Linear parts including the LT1307 family.
The LT1307 series was designed specifically for micropower, single-cell boost conversion in portable medical, instrumentation, and communications equipment-emphasizing ultra-low input voltage operation, ceramic-capacitor compatibility, and integrated system monitoring functions.
FAQ
What is the minimum input voltage required for LT1307BCMS8#PBF to start switching?
The LT1307BCMS8#PBF starts switching at a minimum input voltage of 0.92V (guaranteed over temperature), enabling full functionality from nearly depleted single-cell alkaline or NiMH batteries. This is achieved through optimized bandgap reference design and low-threshold internal transistors. Operation remains stable down to 1V input across the commercial temperature range, with 1.1V minimum specified for industrial grade (–40°C to 85°C).
How does LT1307BCMS8#PBF differ from LT1307CMS8#PBF in terms of output ripple performance?
The LT1307BCMS8#PBF eliminates Burst Mode operation entirely, ensuring continuous 600kHz switching at all load levels-resulting in zero low-frequency (1–10kHz) output ripple. In contrast, the LT1307CMS8#PBF enters Burst Mode below ~100mA load, generating audible and EMI-prone ripple. This makes LT1307BCMS8#PBF preferred for analog signal chains, ADCs, and RF receivers where spectral purity is critical.
Can LT1307BCMS8#PBF be used to generate 5V output from a 1.5V input?
Yes, the LT1307BCMS8#PBF can generate 5V output from a 1.5V input using the standard boost configuration. Set the feedback divider so that VOUT = 1.22V × (1 + R1/R2) = 5V (e.g., R1 = 1MΩ, R2 = 329kΩ). Efficiency reaches ~82% at 50mA load with 1.5V input, and the 500mA internal switch supports peak currents required for transient loads. Input and output capacitor values remain unchanged (1µF and 10µF ceramic).
What is the purpose of the LBI and LBO pins on LT1307BCMS8#PBF?
The LBI (Low-Battery Input) pin accepts a divided battery voltage referenced to the 200mV internal threshold; when LBI falls below 200mV, the open-collector LBO (Low-Battery Output) pin pulls low. This provides system-level battery monitoring without external components-enabling microcontrollers to trigger low-battery warnings or graceful shutdown. LBO sinks up to 10µA and requires a 1MΩ pull-up resistor to VOUT or VIN.
Is LT1307BCMS8#PBF RoHS compliant and lead-free?
Yes, LT1307BCMS8#PBF is RoHS compliant and lead-free. The "#PBF" suffix explicitly denotes Pb-Free (lead-free) packaging per Analog Devices' product marking convention. The MSOP-8 package uses matte tin lead finish, complies with JEDEC J-STD-020 moisture sensitivity level 1, and meets IPC/JEDEC J-STD-033 handling requirements for lead-free reflow soldering.
LT1307BCMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LT1307BCMS8#PBF FAQ
1.How can I place an order for LT1307BCMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1307BCMS8#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 LT1307BCMS8#PBF reliable?
The price and inventory of LT1307BCMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1307BCMS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1307BCMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1307BCMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1307BCMS8#PBF?
LT1307BCMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1307BCMS8#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 LT1307BCMS8#PBF?
For technical support, including LT1307BCMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1307BCMS8#PBF requirements.
6.How does Aetrix verify that LT1307BCMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1307BCMS8#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 LT1307BCMS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1307BCMS8#PBF?
All LT1307BCMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1307BCMS8#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 LT1307BCMS8#PBF part is unused and in its original packaging.
Return procedure for LT1307BCMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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