LINEAR TECHNOLOGY LT1316 Micropower DC DC Converter with Programmable Peak Current Limit
Summary
This micropower step-up DC/DC converter is engineered for reliable voltage boosting from extremely low input sources, down to 1.5V (ideal for battery cells). Featuring ultra-low quiescent current, programmable peak current limiting, and a crucial low-battery detector that remains active in shutdown mode, it enables highly efficient power management in portable electronics. This documentation provides engineers with comprehensive electrical specifications, operating parameters, and application guidance necessary for designing robust, energy-efficient systems.
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LT1316 Micropower
DC/DC Converter with Programmable Peak Current Limit
FEATURES DESCRIPTION
Precise Control of Peak Switch Current The LT®1316 is a micropower step-up DC/DC converter Quiescent Current: that operates from an input voltage as low as 1.5V. A 33µA in Active Mode programmable input current limiting function allows pre- 3µA in Shutdown Mode cise control of peak switch current. Peak switch current Low-Battery Detector Active in Shutdown can be set to any value between 30m A and 500m A by Low Switch VCESAT: 300m V at 500m A adjusting one resistor. This is particularly useful for 8-Lead MSOP and SO Packages DC/DC converters operating from high source impedance Operates with VIN as Low as 1.5V inputs such as lithium coin cells or telephone lines. Logic Level Shutdown Pin
The fixed off-time, variable on-time regulation scheme results in quiescent current of only 33µA in active mode. APPLICATIONS Quiescent current decreases to 3µA in shutdown with the
EF FI CI EN CY low-battery detector still active.
Battery Backup
The LT1316 is available in 8-lead MSOP and SO packages.
LCD Bias Low Power –48V to 5V/3.3V Converters , LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
2-Cell to 5V Step-Up Converter Efficiency vs Load Current
5V 50m A 3.3VIN
VIN SW
1% 2.5VIN
FBSHDN
1.8VIN
LT1316
47µF2 CELLS 47µF
NC LBOLBI NC
RSET GND R2 324k 1%
D1: MOTOROLA MBR0520L
1316 TA01 0.1
L1: SUMIDA CD43-470
LOAD CURRENT (m A)
1316 TA02
Page Summary Contents For LINEAR TECHNOLOGY LT1316 Micropower DC DC Converter with Programmable Peak Current Limit
Manual Details
| Brand | Current |
|---|---|
| Pages | 16 |
| File Size | 300.78 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
What is the minimum operating voltage for this DC/DC converter?
The unit operates from an input voltage as low as 1.5V, making it suitable for lithium coin cells or telephone lines.
How does the device handle peak switch current control?
It includes an active programmable input current limiting function that allows precise control of the peak switch current.
What is the quiescent current in Active and Shutdown modes?
In active mode, the quiescent current is 33μA; it decreases to 3μA during shutdown while the low-battery detector is still active.
Can this converter maintain power when the main source dies (Battery Backup)?
The design offers a low-battery detector that allows operation and monitoring down to specific voltage thresholds.