LINEAR TECHNOLOGY LT1307 Data Sheet - LT1307B Technical Manual
Summary
These micropower DC/DC converters are engineered for extreme low-power applications requiring reliable performance from a single-cell supply, operating efficiently down to 1V. The manual provides comprehensive technical specifications, full efficiency curves, and detailed application circuits. Ideal for developers building portable electronics, battery backup systems, medical instrumentation, and cordless communication devices that demand high energy conservation and minimal component footprint using small ceramic capacitors.
Page 1 Text Content
LT1307/LT1307B
Single Cell Micropower
600k Hz PWM DC/DC Converters
FEATURES DESCRIPTIO Uses Small Ceramic Capacitors The LT®1307/LT1307B are micropower, fixed frequency 50µA Quiescent Current (LT1307) DC/DC converters that operate from an input voltage as 1m A Quiescent Current (LT1307B) low as 1V. First in the industry to achieve true current Operates with VIN as Low as 1V mode PWM performance from a single cell supply, the 600k Hz Fixed Frequency Operation LT1307 features automatic shifting to power saving Burst
Starts into Full Load Mode operation at light loads. High efficiency is main- Low Shutdown Current: 3µA tained over a broad 100µA to 100m A load range. The Low-Battery Detector LT1307B does not shift into Burst Mode operation at light 3.3V at 75m A from a Single Cell loads, eliminating low frequency output ripple at the Automatic Burst Mode® Operation at expense of light load efficiency. The devices contain a low- Light Load (LT1307) battery detector with a 200m V reference and shut down to Continuous Switching at Light Load (LT1307B) less than 5µA. No load quiescent current of the LT1307 is Low VCESAT Switch: 295m V at 500m A 50µA and the internal NPN power switch handles a 500m A current with a voltage drop of just 295m V. Unlike competitive devices, large electrolytic capacitors
APPLICATIO S
are not required with the LT1307/LT1307B in single cell
Pagers applications. The high frequency (600k Hz) switching al-
EF FI CI EN CY
Cordless Telephones lows the use of tiny surface mount multilayer ceramic GPS Receivers (MLC) capacitors along with small surface mount induc- Battery Backup tors. The devices work with just 10µF of output capaci- Portable Electronic Equipment tance and require only 1µF of input bypassing. Glucose Meters
The LT1307/LT1307B are available in 8-lead MSOP, PDIP
Diagnostic Medical Instrumentation
and SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
Single Cell to 3.3V Converter Efficiency
C1: MURATA-ERIE GRM235Y5V105Z01 MARCON THCS50E1E105Z
VIN SW TOKIN 1E105ZY5U-C103-F
LBI FB C2: MURATA-ERIE GRM235Y5V106Z01
MARCON THCS50E1E105Z VIN = 1.5V
LT1307 R1
1.5V 1.02M TOKIN 1E106ZY5U-C304-F
SHDNSHUTDOWN LBO
CELL 1% D1: MOTOROLA MBR0520L VIN = 1V
VC GND
C2 L1: COILCRAFT D01608C-103
R2 10µF VIN = 1.25V
SUMIDA CD43-100
MURATA ERIE LQH3C100
680p F FOR 5V OUTPUT: R1 = 1M, R2 = 329k
Figure 1. Single Cell to 3.3V Boost Converter 0.1
LOAD CURRENT (m A)
1307 TA01
1307fa
Page Summary Contents For LINEAR TECHNOLOGY LT1307 Data Sheet - LT1307B Technical Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 20 |
| File Size | 369.55 KB |
| Published | May 25, 2026 |
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Frequently Asked Questions
What is the low input voltage requirement for operation?
The LT1307/LT1307B can operate with an input voltage (VIN) as low as 1V.
What is the maximum operating temperature range for industrial use?
The Industrial grade devices can operate from -40°C to 85°C.