My Inquiry
My Account
Analog Devices Inc. LT1307BCS8#TRPBF
- Part No.:
- LT1307BCS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1307BCS8#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 600MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,252
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1307BCS8#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. It delivers up to 75mA at 3.3V from 1.0V input, features a 1.22V feedback reference, 295mV NPN switch VCE(SAT) at 500mA, and operates with only 1µF input and 10µF ceramic output capacitance. It is used in ultra-low-power portable medical and telemetry devices requiring clean, ripple-free regulated output.
For engineers reviewing the LT1307BCS8#TRPBF datasheet, LT1307BCS8#TRPBF pinout, LT1307BCS8#TRPBF application, or LT1307BCS8#TRPBF equivalent, key selection criteria include light-load continuous switching behavior (no Burst Mode), 1mA quiescent current, low-battery detection with 200mV threshold, and compatibility with small MLCCs and surface-mount inductors in space-constrained designs.
Technical Context
The LT1307BCS8#TRPBF implements a current-mode PWM architecture with fixed 600kHz switching frequency and no hysteresis in its error amplifier comparator-ensuring continuous switching even at light loads (e.g., 1–10mA). Unlike the LT1307 variant, it eliminates low-frequency output ripple by avoiding Burst Mode, trading off light-load efficiency for spectral cleanliness critical in RF-sensitive applications like GPS receivers.
Its internal NPN power switch supports 500mA peak current with 295mV saturation voltage, and the integrated low-battery detector uses a precision 200mV reference on LBI with open-collector LBO output. Compensation is externally set via RC network on VC pin, enabling stable loop response across 1V–5V input and 3.3V/5V output configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 600kHz fixed - enables use of tiny 10µH inductors and 10µF ceramic output capacitors, minimizing board area and EMI filtering complexity. |
| Feedback Voltage | 1.22V ±20mV - sets output voltage via external resistor divider (e.g., 3.3V = 1.22V × (1 + R1/R2)), enabling precise regulation without trimming. |
| Quiescent Current | 1.0mA (typ) - defines minimum operating current when active but unloaded; higher than LT1307's 50µA but ensures ripple-free continuous operation. |
| Input Voltage Range | 1.0V to 5.0V - supports direct operation from single-cell batteries (0.92V min start-up) and compatibility with 2-cell or regulated input rails. |
| Switch VCE(SAT) | 295mV at 500mA - limits conduction loss in boost switch, sustaining >85% efficiency at 75mA load from 1.25V input. |
| Low-Battery Threshold | 200mV ±10mV - triggers LBO output when battery voltage drops below usable level, allowing system-level shutdown before brownout. |
| Shutdown Current | 3µA max - reduces total system standby power when SHDN pin is grounded, preserving battery life during idle periods. |
Pinout & Package
LT1307BCS8#TRPBF is housed in an 8-lead plastic SO package (S8), measuring 4.9mm × 3.9mm × 1.45mm, with standard SOIC thermal and mechanical characteristics (θJA = 120°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (1) | Compensation node for error amplifier | Connect external RC network (e.g., 100kΩ + 680pF) to stabilize control loop; trace area must be minimized to prevent noise coupling. |
| FB (2) | Feedback input | Monitors output voltage via resistor divider; 1.22V reference enables accurate output setting; sensitive node requiring short, shielded routing. |
| SHDN (3) | Enable/disable control | Pull to GND to disable IC (IQ ≤ 3µA); tie to VIN or higher to enable; must never float to avoid erratic behavior. |
| GND (4) | Power and signal reference | Direct connection to local ground plane required; separates power and analog return paths to minimize noise injection into FB/VC. |
| SW (5) | Switch node | Connects to inductor and Schottky diode anode; high dV/dt node demanding minimal trace length and area to reduce EMI and ringing. |
| VIN (6) | Main power input | Accepts 1.0V–5.0V; requires 1µF ceramic bypass capacitor placed within 5mm to suppress high-frequency supply noise. |
| LBI (7) | Low-battery detector input | High-impedance input referenced to 200mV; monitors battery voltage via resistive divider; bias current <30nA minimizes divider loading. |
| LBO (8) | Low-battery open-collector output | Sinks up to 10µA when LBI < 200mV; requires external pull-up (e.g., 1MΩ) to host logic rail for system-level alert signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous switching at light loads | Eliminates Burst Mode low-frequency ripple (e.g., 5–10kHz), delivering spectrally clean output essential for GPS, RF receivers, and analog sensor front-ends. |
| Single-cell start-up capability | Operates down to 0.92V input, enabling full functionality from fresh or partially discharged alkaline/NiMH cells without external wake-up circuitry. |
| Integrated low-battery detector | Provides system-level battery health monitoring with 200mV threshold and open-collector LBO output, reducing BOM count and firmware polling overhead. |
| Minimal external component count | Requires only one inductor, one Schottky diode, one 1µF input cap, and one 10µF output cap - no electrolytics needed, simplifying layout and improving reliability. |
| 600kHz fixed-frequency PWM | Enables consistent EMI profile and predictable filter design; avoids subharmonic oscillation via ramp compensation, supporting >50% duty cycles stably. |
Applications
| Glucose Meters | GPS Receivers |
|---|---|
Use Scenario: Portable handheld glucose meters powered by single AAA alkaline cells requiring stable 3.3V rail for ADC, microcontroller, and LCD backlight. IC Role / Device Role / Timing Role: Primary boost regulator generating regulated 3.3V output from 0.9–1.5V battery source; provides clean, ripple-free supply to precision analog front-end. Use Value: Continuous switching (no Burst Mode) prevents low-frequency noise from modulating ADC reference or corrupting weak electrochemical sensor signals. | Use Scenario: Compact GPS modules in asset trackers or wearables, where RF sensitivity demands ultra-low switching noise near 1.575GHz L1 band harmonics. IC Role / Device Role / Timing Role: Power management IC supplying 3.3V to GPS baseband processor and RF frontend; operates continuously to avoid spurious sidebands in receiver IF stage. Use Value: Absence of Burst Mode eliminates 5–50kHz sidebands around 600kHz fundamental, preventing mixing products that degrade C/N0 ratio in weak-signal acquisition. |
| Diagnostic Medical Instrumentation | Cordless Telephones |
Use Scenario: Battery-powered portable ECG or pulse oximeter units needing isolated, low-noise 3.3V/5V rails for analog signal conditioning and digital processing. IC Role / Device Role / Timing Role: Micropower DC/DC converter powering analog signal chain; co-located with precision op-amps and delta-sigma ADCs. Use Value: 1mA quiescent current balances low-power operation with spectral purity, avoiding interference with µV-level bio-potential measurements. | Use Scenario: DECT cordless phone handsets using single-cell NiMH packs, requiring efficient 3.3V supply for DSP, RF transceiver, and display. IC Role / Device Role / Timing Role: Main system regulator delivering up to 75mA at 3.3V; interfaces directly with battery and load without intermediate LDOs. Use Value: 295mV VCE(SAT) and 600kHz switching minimize conduction and core losses, extending talk time by >12% vs. competing 300kHz converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1307CS8#TRPBF | Includes Burst Mode operation; 50µA quiescent current; same pinout and package. | Higher light-load efficiency but introduces 5–50kHz output ripple; unsuitable for noise-sensitive analog/RF loads. | Select when battery life at microamp loads is critical and output ripple can be filtered externally. |
| TPS61200DRCR | 2.5V–6.0V input range; 1.2V feedback; 1.2MHz switching; integrated synchronous rectifier. | Cannot start from <1.8V; requires larger inductor; lacks dedicated low-battery detector output. | Select for higher input voltage systems (>2V) where efficiency >90% at 50mA is prioritized over single-cell start-up and battery monitoring. |
Compared with LT1307CS8#TRPBF, the LT1307BCS8#TRPBF trades 20× higher quiescent current for ripple-free continuous operation-critical where low-frequency noise corrupts sensor data. Against TPS61200DRCR, it offers true single-cell start-up and integrated battery monitoring but at lower switching frequency and efficiency above 2V input.
Availability
LT1307BCS8#TRPBF is available at Aetrix Electronics and suitable for glucose meters, GPS receivers, diagnostic medical instrumentation, cordless telephones, and portable electronic equipment requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for LT1307BCS8#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT1307B series belongs to Linear Technology's micropower DC/DC converter product line, designed specifically for battery-powered portable electronics where ultra-low input voltage operation, minimal external components, and spectral cleanliness are mandatory.
FAQ
What is the minimum input voltage required for LT1307BCS8#TRPBF to start switching?
The LT1307BCS8#TRPBF guarantees start-up at 0.92V under specified conditions, and operates continuously down to 1.0V input. This enables reliable operation from single-cell alkaline or NiMH batteries across their full discharge curve, including deeply depleted states where other boost converters fail to initiate regulation. The LT1307BCS8#TRPBF achieves this via optimized bandgap reference and low-threshold startup circuitry.
Does LT1307BCS8#TRPBF support adjustable output voltage?
Yes, the LT1307BCS8#TRPBF supports fully adjustable output voltage via an external resistor divider connected to the FB pin. With a precise 1.22V internal reference, output voltage is calculated as VOUT = 1.22V × (1 + R1/R2). Common configurations include 3.3V (R1 = 1.02MΩ, R2 = 604kΩ) and 5.0V (R1 = 1.0MΩ, R2 = 329kΩ), both validated in the datasheet's Figure 1.
How does LT1307BCS8#TRPBF differ from LT1307CS8#TRPBF in burst mode behavior?
The LT1307BCS8#TRPBF disables Burst Mode entirely due to absence of hysteresis in its error amplifier comparator, ensuring continuous 600kHz switching even at 1mA load. In contrast, the LT1307CS8#TRPBF activates Burst Mode below ~10mA, causing low-frequency (5–50kHz) output ripple. This makes the LT1307BCS8#TRPBF preferable for noise-sensitive applications, while the LT1307CS8#TRPBF offers superior light-load efficiency.
Can LT1307BCS8#TRPBF drive a 100mA load at 3.3V from a 1.2V input?
No-the LT1307BCS8#TRPBF is rated for up to 75mA at 3.3V from a 1.2V input, as confirmed by efficiency curves and switch current limit specifications (max 1.25A peak, but practical output current limited by thermal and inductor constraints). Attempting 100mA risks thermal shutdown or regulation loss; for higher currents, consider the LT1308B or synchronous alternatives like the LTC3530.
What is the purpose of the LBI and LBO pins on LT1307BCS8#TRPBF?
The LBI (Low-Battery Input) pin accepts a scaled battery voltage and compares it to an internal 200mV reference; when LBI falls below threshold, the open-collector LBO (Low-Battery Output) pin pulls low to signal end-of-life condition. This allows host microcontrollers to initiate graceful shutdown or battery replacement alerts without external comparators-reducing component count and PCB area in space-constrained designs using LT1307BCS8#TRPBF.
LT1307BCS8#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:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1307BCS8#TRPBF FAQ
1.How can I place an order for LT1307BCS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1307BCS8#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 LT1307BCS8#TRPBF reliable?
The price and inventory of LT1307BCS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1307BCS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1307BCS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1307BCS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1307BCS8#TRPBF?
LT1307BCS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1307BCS8#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 LT1307BCS8#TRPBF?
For technical support, including LT1307BCS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1307BCS8#TRPBF requirements.
6.How does Aetrix verify that LT1307BCS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1307BCS8#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 LT1307BCS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1307BCS8#TRPBF?
All LT1307BCS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1307BCS8#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 LT1307BCS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1307BCS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1307BCS8#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
