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Analog Devices Inc. LT1307CMS8#PBF
- Part No.:
- LT1307CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1307CMS8#PBF.pdf
- Description:
- IC REG BOOST ADJ 600MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:242
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Product details
Overview
LT1307CMS8#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 integrates an NPN power switch with 295mV VCE(SAT) at 500mA, delivers up to 75mA at 3.3V output, and features automatic Burst Mode™ operation for >85% efficiency at 100µA load. Used in glucose meters and GPS receivers where ultra-low quiescent current and ceramic-capacitor compatibility are critical.
For engineers reviewing the LT1307CMS8#PBF datasheet, LT1307CMS8#PBF pinout, LT1307CMS8#PBF application, or LT1307CMS8#PBF equivalent, key selection criteria include its 50µA no-load quiescent current, 1.22V feedback reference, low-battery detector with 200mV threshold, 600kHz switching frequency enabling <10µF ceramic output capacitance, and MSOP-8 package suitability for space-constrained portable medical and instrumentation designs.
Technical Context
The LT1307CMS8#PBF implements current-mode PWM control with a 600kHz oscillator and internal ramp generator to prevent subharmonic oscillation above 50% duty cycle. Its error amplifier uses external RC compensation on the VC pin to stabilize the feedback loop across input voltages from 1V to 5V and load currents from 100µA to 100mA.
Burst Mode™ operation-enabled only in the LT1307 variant-is triggered when load current drops below ~100mA (with 10µH inductor), reducing average supply current to 50µA while maintaining regulation via intermittent switching. The low-battery detector (LBI/LBO pins) provides a 200mV reference with open-collector output capable of sinking 10µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1V to 5V - supports direct connection to single-cell batteries without pre-regulation |
| Quiescent Current | 50µA (not switching) - enables multi-year battery life in always-on medical sensors |
| Switching Frequency | 600kHz (typ) - allows use of 10µH inductors and 10µF ceramic output capacitors |
| Feedback Reference | 1.22V (±20mV) - sets output voltage via resistor divider: VOUT = 1.22V × (1 + R1/R2) |
| Power Switch VCE(SAT) | 295mV at 500mA - minimizes conduction loss in high-current pulse loads |
| Low-Battery Threshold | 200mV (±10mV) - precise detection of end-of-life in 1.5V alkaline cells |
| Shutdown Current | 3µA - ensures near-zero drain during storage or standby modes |
Pinout & Package
LT1307CMS8#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 4 is GND, pin 5 is SW (switch node), and pin 8 is LBO (open-collector low-battery output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Compensation node for error amplifier | Connect series RC (e.g., 100kΩ + 680pF) to ground to stabilize feedback loop |
| FB (Pin 2) | Feedback input | Monitors output via resistor divider; 1.22V reference sets regulated output voltage |
| SHDN (Pin 3) | Enable/disable control | Ground to shut down; tie to VIN or higher to enable; floating causes erratic behavior |
| GND (Pin 4) | Power and signal ground | Must connect directly to local ground plane; shared return for SW and LBO |
| SW (Pin 5) | Switch node | Drives external inductor/diode; high di/dt requires short, low-inductance trace |
| VIN (Pin 6) | Input supply | Requires 1µF ceramic bypass capacitor placed within 5mm of pin |
| LBI (Pin 7) | Low-battery detector input | Accepts voltage from battery divider; 200mV threshold triggers LBO assertion |
| LBO (Pin 8) | Low-battery detector output | Open-collector NPN output; requires external 1MΩ pull-up to monitor battery state |
Key Features
| Feature | Design Value |
|---|---|
| Single-cell start-up capability | Operates from 0.92V input - enables full functionality even as alkaline cells deplete to 1.0V |
| Ultra-low quiescent current | 50µA in shutdown, 50µA no-load operating - extends battery life in intermittent-use devices |
| Ceramic capacitor compatibility | Stable with 1µF input and 10µF output ceramic caps - eliminates bulky electrolytics and improves reliability |
| Integrated low-battery detector | 200mV precision reference with open-collector LBO - enables system-level battery monitoring without external comparators |
| Burst Mode™ efficiency optimization | Automatic transition to micropower pulsing below ~100mA load - maintains >80% efficiency at 100µA output current |
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, sensor interface, and LCD display from decaying 0.9–1.5V battery voltage. Use Value: 50µA quiescent current extends battery life beyond 1,000 tests per cell; Burst Mode™ maintains regulation during brief sensor activation pulses without audible noise or EMI interference. | Use Scenario: Battery-powered handheld GPS unit requiring continuous RF front-end bias and baseband processing under weak-signal conditions. IC Role / Device Role / Timing Role: Primary 3.3V supply for GPS chipset and MCU, operating across wide temperature range (–20°C to 70°C) with minimal output ripple. Use Value: 600kHz switching avoids 455kHz IF band; low 295mV VCE(SAT) sustains >75mA peak current during satellite acquisition bursts without thermal derating. |
| Pagers | Diagnostic Medical Instrumentation |
Use Scenario: Two-way alphanumeric pager with backlight and vibration motor, powered by single AAA NiMH cell. IC Role / Device Role / Timing Role: High-efficiency boost regulator delivering 3.3V to RF transceiver and display driver, with fast transient response to backlight activation. Use Value: 100µA–100mA load range coverage eliminates need for separate LDOs; MSOP-8 footprint enables compact PCB layout in slim form factor. | Use Scenario: Portable ECG or pulse oximeter performing real-time analog signal conditioning and digital sampling on disposable battery packs. IC Role / Device Role / Timing Role: Precision 3.3V supply for ADC, op-amps, and Bluetooth LE radio, with low-noise operation critical for microvolt-level bio-potential measurements. Use Value: Ceramic-capacitor stability and absence of low-frequency Burst Mode™ ripple (when configured with proper inductor) prevents aliasing into sensitive analog signal chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1307BCMS8#PBF | No Burst Mode™; continuous 600kHz switching at all loads; 1mA quiescent current vs. 50µA | Eliminates low-frequency output ripple but sacrifices light-load efficiency; preferred for noise-sensitive analog circuits | Select when clean, ripple-free 3.3V output is prioritized over battery life in always-active systems |
| TPS61200DRCR | Higher 1.2MHz switching; integrated 1.3A switch; 5.5V max input; no built-in low-battery detector | Supports wider input range and higher output current but requires external battery monitoring circuitry | Choose for designs needing >100mA output or dual-cell compatibility, accepting added BOM complexity |
Compared with LT1307BCMS8#PBF, the LT1307CMS8#PBF trades higher light-load efficiency for low-frequency ripple; versus TPS61200DRCR, it offers integrated battery monitoring and lower quiescent current at the cost of reduced current capability and input voltage range.
Availability
LT1307CMS8#PBF is available at Aetrix Electronics and suitable for glucose meters, GPS receivers, pagers, and diagnostic medical instrumentation requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for LT1307CMS8#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, datasheets, and application engineering for legacy Linear parts including the LT1307 family.
The LT1307 product line was designed specifically for ultra-low-power, single-cell boost conversion in portable medical, instrumentation, and communications equipment where battery life and small solution size are primary constraints.
FAQ
What is the minimum input voltage required for LT1307CMS8#PBF to start switching?
The LT1307CMS8#PBF guarantees start-up at 0.92V input voltage and operates continuously down to 1V under typical conditions. At –40°C, minimum functional input rises to 1.1V due to increased internal transistor VBE drop; datasheet Figure 15 confirms stable regulation at 0.92V with 1.5V output configuration.
Can LT1307CMS8#PBF be used to generate 5V output from a single cell?
Yes, LT1307CMS8#PBF can generate 5V output using an external resistor divider on the FB pin (R1 = 1MΩ, R2 = 329kΩ per datasheet Figure 1). Efficiency remains >75% at 20mA load with 1.5V input, though peak output current is reduced compared to 3.3V due to higher duty cycle and switch stress.
How does the low-battery detector in LT1307CMS8#PBF function?
The LT1307CMS8#PBF low-battery detector compares voltage on LBI pin to an internal 200mV reference. When LBI falls below 200mV, open-collector LBO pulls low (≤0.25V at 10µA sink). No hysteresis is present, allowing use as a precision comparator; external 1MΩ pull-up is required on LBO.
What is the recommended inductor value for LT1307CMS8#PBF in a 3.3V boost application?
Datasheet Figure 1 specifies 10µH for standard 3.3V/75mA operation. For improved light-load stability with LT1307CMS8#PBF, 22µH reduces Burst Mode™ frequency and output ripple; for ultra-low-noise applications, 100µH enables continuous switching down to 5mA (Figure 5), though transient response slows.
Is LT1307CMS8#PBF RoHS compliant and lead-free?
Yes, LT1307CMS8#PBF carries the #PBF suffix indicating lead-free, RoHS-compliant packaging. The MS8 package uses matte tin lead finish, meets JEDEC J-STD-020 moisture sensitivity level 1, and supports reflow soldering per IPC/JEDEC J-STD-020.
LT1307CMS8#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
LT1307CMS8#PBF FAQ
1.How can I place an order for LT1307CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1307CMS8#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 LT1307CMS8#PBF reliable?
The price and inventory of LT1307CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1307CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1307CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1307CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1307CMS8#PBF?
LT1307CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1307CMS8#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 LT1307CMS8#PBF?
For technical support, including LT1307CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1307CMS8#PBF requirements.
6.How does Aetrix verify that LT1307CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1307CMS8#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 LT1307CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1307CMS8#PBF?
All LT1307CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1307CMS8#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 LT1307CMS8#PBF part is unused and in its original packaging.
Return procedure for LT1307CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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