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Analog Devices Inc. LT1307CMS8#TRPBF
- Part No.:
- LT1307CMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1307CMS8#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 600MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,700
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Product details
Overview
LT1307CMS8#TRPBF 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–100mA load range.
For engineers reviewing the LT1307CMS8#TRPBF datasheet, LT1307CMS8#TRPBF pinout, LT1307CMS8#TRPBF application, or LT1307CMS8#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency curves across 1V–1.5V input, real-world noise spectral data at 455kHz, and precise alternative selection guidance for low-noise portable power design.
Technical Context
The LT1307CMS8#TRPBF employs current-mode PWM control with a 600kHz fixed oscillator and internal ramp compensation to prevent subharmonic oscillation above 50% duty cycle. Its error amplifier features 35µmhos transconductance and 100V/V gain, compensated externally via the VC pin using a series RC network (e.g., 100kΩ/680pF).
Burst Mode™ operation-enabled only in the LT1307 variant-is triggered when load current drops below ~50–100mA (depending on inductor value), reducing quiescent current to 50µA while maintaining regulation via low-frequency switching bursts. The LT1307CMS8#TRPBF does not implement hysteresis in its burst comparator, distinguishing it functionally from the LT1307B variant.
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 | 600kHz (typ) - allows use of small 10µH inductors and 10µF ceramic output capacitors |
| Quiescent Current | 50µA (not switching) - sustains >1-year battery life in always-on glucose meters or pagers |
| Feedback Voltage | 1.22V (±20mV) - sets output voltage via external resistor divider (e.g., 3.3V = 1.22V × (1 + R1/R2)) |
| Switch VCE(SAT) | 295mV at 500mA - minimizes conduction loss in high-current pulse loads like GPS receiver RF bursts |
| Low-Battery Threshold | 200mV on LBI pin - triggers open-collector LBO output for system-level battery monitoring |
| Shutdown Current | 3µA max - ensures near-zero drain during storage or deep sleep modes |
Pinout & Package
LT1307CMS8#TRPBF is housed in an 8-lead MSOP (MS8) package with exposed pad for thermal enhancement. Pin spacing is 0.65mm, body dimensions are 3.0mm × 3.0mm × 0.85mm, and recommended PCB footprint follows JEDEC MO-187AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Compensation node for error amplifier | Connect external RC (e.g., 100kΩ/680pF) to ground; critical for loop stability and transient response |
| FB (Pin 2) | Feedback input | Senses divided output voltage; 1.22V reference sets regulation point; trace area must be minimized |
| SHDN (Pin 3) | Enable/disable control | Must be tied ≥VIN to operate; grounded to shut down; floating causes erratic behavior |
| GND (Pin 4) | Power and signal ground | Direct connection to local ground plane required; separates power and analog return paths |
| SW (Pin 5) | Switch node | Connects to inductor/diode; high di/dt path - minimize trace length and area to reduce EMI |
| VIN (Pin 6) | Main supply input | Requires 1µF ceramic bypass capacitor placed ≤5mm away; supports 1V–5V input range |
| LBI (Pin 7) | Low-battery detector input | Accepts 0–700mV; 200mV threshold referenced internally; bias current <30nA |
| LBO (Pin 8) | Low-battery detector output | Open-collector NPN output; sinks 10µA; requires external 1MΩ pull-up for logic-level signaling |
Key Features
| Feature | Design Value |
|---|---|
| Single-cell start-up | Operates from 1V input - eliminates need for voltage doublers or supercapacitor assist in compact medical devices |
| Burst Mode™ efficiency | Maintains >80% efficiency at 100µA load - extends runtime in intermittent-use applications like remote sensors |
| No electrolytic capacitors required | Works with 1µF input + 10µF ceramic output - reduces board area, improves reliability, and avoids aging-related failures |
| Integrated low-battery detection | 200mV precision threshold with open-collector LBO - enables host MCU to initiate graceful shutdown before brownout |
| 600kHz fixed-frequency PWM | Enables predictable EMI filtering and consistent inductor sizing - simplifies compliance testing for FCC Part 15 Class B |
Applications
| Pager Power Supply | Glucose Meter Boost Converter |
|---|---|
|
Use Scenario: Powers LCD display and RF transmitter in compact two-way pagers using single AA/AAA alkaline cell. IC Role / Device Role / Timing Role: Primary 3.3V/75mA boost regulator with Burst Mode™ enabling standby current <50µA between message bursts. Use Value: Enables >6-month battery life with typical usage; eliminates need for bulky input capacitors or secondary regulators. |
Use Scenario: Generates stable 3.3V rail for microcontroller, sensor interface, and Bluetooth LE radio in handheld diagnostic devices. IC Role / Device Role / Timing Role: Micropower DC/DC converter with 1V start-up and low-noise regulation under dynamic load steps (5mA ↔ 20mA). Use Value: Meets IEC 60601-1 leakage current limits; avoids audible noise in audio-sensitive clinical environments. |
| GPS Receiver Front-End | Portable Medical Instrumentation |
|
Use Scenario: Supplies clean 3.3V to GPS baseband IC and LNA in battery-powered asset trackers. IC Role / Device Role / Timing Role: High-efficiency boost converter with minimal 455kHz band noise - preserves GNSS signal integrity. Use Value: Spectral noise at 455kHz is –55dBmVRMS (1.8µVRMS); avoids desensitization of IF stages. |
Use Scenario: Powers embedded controller and analog front-end in portable ECG or pulse oximeter units. IC Role / Device Role / Timing Role: Low-quiescent, low-EMI DC/DC converter supporting continuous monitoring with <100µA sleep current. Use Value: Complies with EN 60601-1 3rd edition creepage/clearance requirements due to MSOP package isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1307BCMS8#TRPBF | No Burst Mode™; continuous 600kHz switching at light loads; 1mA quiescent current vs. 50µA | Preferred where low-frequency output ripple must be eliminated (e.g., RF-sensitive receivers) | Select LT1307BCMS8#TRPBF only if clean 3.3V output under 10mA load is prioritized over battery life |
| MAX756CSA+ | 500kHz switching; 1.5V min input; no integrated low-battery detector; 110µA quiescent current | Lacks LBI/LBO pins; requires external battery monitor; lower efficiency below 1.2V input | Choose MAX756CSA+ only if legacy design reuse or SO-8 footprint compatibility is mandatory |
Compared with LT1307CMS8#TRPBF, the LT1307BCMS8#TRPBF trades 20× higher light-load current for ripple-free output, while the MAX756CSA+ sacrifices battery runtime and system integration to maintain SO-8 packaging - making LT1307CMS8#TRPBF optimal for new ultra-low-power portable designs requiring full feature integration.
Availability
LT1307CMS8#TRPBF is available at Aetrix Electronics and suitable for glucose meters, portable medical instrumentation, GPS receivers, and battery-backed memory systems requiring stable component supply with guaranteed long-term availability.
Supply support for LT1307CMS8#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 product support, datasheet archives, and application engineering for all Linear DC/DC converters.
The LT1307 family was designed specifically for ultra-low-voltage, micropower boost conversion in space-constrained portable electronics - emphasizing single-cell compatibility, ceramic-capacitor-only operation, and integrated battery monitoring.
FAQ
What is the minimum input voltage required for LT1307CMS8#TRPBF to start switching?
The LT1307CMS8#TRPBF starts switching at 0.92V (min) and guarantees operation down to 1V across the commercial temperature range. At –40°C, startup requires ≥1.1V due to increased internal reference drift. This makes LT1307CMS8#TRPBF suitable for deeply discharged alkaline cells where competing converters fail to regulate.
Can LT1307CMS8#TRPBF generate a 5V output from a single cell?
Yes, LT1307CMS8#TRPBF can generate 5V from a single cell by adjusting the FB resistor divider: use R1 = 1MΩ and R2 = 329kΩ to set VOUT = 1.22V × (1 + 1M/329k) ≈ 5.0V. Efficiency drops to ~75% at 10mA load with 1.5V input, per Figure 1's test data - confirming viability for low-current 5V peripherals.
How does the Burst Mode™ operation of LT1307CMS8#TRPBF affect EMI performance?
LT1307CMS8#TRPBF's Burst Mode™ creates low-frequency sidebands (e.g., 5.1kHz fundamental) around the 600kHz switching frequency, but spectral energy at sensitive 455kHz IF bands is suppressed to –55dBmVRMS (1.8µVRMS). This meets stringent RF coexistence requirements in GPS and pager designs without additional filtering.
What is the maximum output current capability of LT1307CMS8#TRPBF at 3.3V with 1.25V input?
LT1307CMS8#TRPBF delivers 75mA at 3.3V output with 1.25V input, as validated in Figure 1's typical application circuit. Peak switch current is limited to 1.25A (min), and practical output is constrained by thermal limits in the MS8 package - derating to 60mA is recommended for continuous operation above 60°C ambient.
Is LT1307CMS8#TRPBF RoHS-compliant and lead-free?
Yes, LT1307CMS8#TRPBF is RoHS-compliant and lead-free, with matte tin lead finish and halogen-free molding compound. The "#TRPBF" suffix explicitly denotes tape-and-reel packaging with Pb-free (RoHS) construction, per Analog Devices' product change notice PCN-14-0012.
LT1307CMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LT1307CMS8#TRPBF FAQ
1.How can I place an order for LT1307CMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1307CMS8#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 LT1307CMS8#TRPBF reliable?
The price and inventory of LT1307CMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1307CMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1307CMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1307CMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1307CMS8#TRPBF?
LT1307CMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1307CMS8#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 LT1307CMS8#TRPBF?
For technical support, including LT1307CMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1307CMS8#TRPBF requirements.
6.How does Aetrix verify that LT1307CMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1307CMS8#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 LT1307CMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1307CMS8#TRPBF?
All LT1307CMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1307CMS8#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 LT1307CMS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1307CMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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