LT3468
PRODUCTIONPhotoflash Capacitor Chargers in ThinSOT™
- Part Models
- 6
- 1ku List Price
- Starting From $3.33
Overview
- Highly Integrated IC Reduces Solution Size
- Uses Small Transformers:
- 5.8mm × 5.8mm × 3mm
- Fast Photoflash Charge Times:
- 4.6s for LT3468 (0V to 320V, 100µF, VIN = 3.6V)
- 5.7s for LT3468-2 (0V to 320V, 100µF, VIN = 3.6V)
- 5.5s for LT3468-1 (0V to 320V, 50µF, VIN = 3.6V)
- Controlled Input Current:
- 500mA (LT3468)
- 375mA (LT3468-2)
- 225mA (LT3468-1)
- Supports Operation from Single Li-Ion Cell, or Any Supply from 2.5V up to 16V
- Adjustable Output Voltage
- No Output Voltage Divider Needed
- Charges Any Size Photoflash Capacitor
- Low Profile (<1mm) SOT-23 Package
The LT3468/LT3468-1/LT3468-2 are highly integrated ICs designed to charge photoflash capacitors in digital and film cameras. A patented control technique* allows for the use of extremely small transformers. Each device contains an on-chip high voltage NPN power switch. Output voltage detection* is completely contained within the device, eliminating the need for any discrete zener diodes or resistors. The output voltage can be adjusted by simply changing the turns ratio of the transformer. The LT3468 has a primary current limit of 1.4A, the LT3468-2 has a 1A limit, and the LT3468-1 has a 0.7A limit. These different current limit levels result in well controlled input currents of 500mA for the LT3468, 375mA for the LT3468-2 and 225mA for the LT3468-1. Aside from the differing current limit, the three devices are otherwise equivalent.
The CHARGE pin gives full control of the part to the user. Driving CHARGE low puts the part in shutdown. The DONE pin indicates when the part has completed charging. The LT3468 series of parts are available in tiny low profile (1mm) SOT-23 packages.
Applications
- Digital / Film Camera Flash
- PDA / Cell Phone Flash
- Emergency Strobe
Documentation
Data Sheet 1
User Guide 3
Application Note 2
Design Note 1
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT3468ES5#TRMPBF | 5-Lead TSOT-23 | ||
| LT3468ES5#TRPBF | 5-Lead TSOT-23 | ||
| LT3468ES5-1#TRMPBF | 5-Lead TSOT-23 | ||
| LT3468ES5-1#TRPBF | 5-Lead TSOT-23 | ||
| LT3468ES5-2#TRMPBF | 5-Lead TSOT-23 | ||
| LT3468ES5-2#TRPBF | 5-Lead TSOT-23 |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareTools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3468
- LT3468-1
- LT3468-2
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LT3468ES5-1 | Photoflash Capacitor Charger High Voltage Supply, 2.8V to 8VIN, 320VOUT
Resources
LT3468ES5-1 | Photoflash Capacitor Charger High Voltage Supply, 2.8V to 8VIN, 320VOUT
Resources
LT3468ES5-1 | Cell Phone Photoflash Charger, VIN(5V Max), 2.8V to 4.2V
Resources
LT3468ES5-1 | Cell Phone Photoflash Charger, VIN(5V Max), 2.8V to 4.2V
Resources
LT3468ES5-1 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 0.7A
Resources
LT3468ES5-1 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 0.7A
Resources
LT3468ES5-2 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 1.0A
Resources
LT3468ES5-2 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 1.0A
Resources
LT3468ES5 | Photoflash Capacitor Charger High Voltage Supply, 2.8V to 8VIN, 320VOUT
Resources
LT3468ES5 | Photoflash Capacitor Charger High Voltage Supply, 2.8V to 8VIN, 320VOUT
Resources
LT3468ES5 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 1.4A
Resources
LT3468ES5 | Photoflash Capacitor Charger High Voltage Supply, VIN = 2.5V-8V, VOUT = 320V, ISW - PK = 1.4A