LT1614 - Inverting 600kHz Switching Regulator
Datasheet 
DocumentationDatasheet
Application Note
Reliability Data
LT Journal
cad_symbol
Features
- Better Regulation Than a Charge Pump
- 0.1 Ohm Effective Output Impedance
- ±5V at 200mA from a 5V Input
- 600kHz Fixed Frequency Operation
- Operates with VIN as Low as 1V
- 1mA Quiescent Current
- Low Shutdown Current: 10µA
- Low-Battery Detector
- Low VCESAT Switch: 295mV at 500mA
Typical Application
Description
The LT1614 is a fixed frequency, inverting mode switching regulator that operates from an input voltage as low as 1V. Utilizing a low noise topology, the LT1614 can generate a negative output down to -24V from a 1V to 5V input. Fixed frequency switching ensures a clean output free from low frequency noise. The device contains a low-battery detector with a 200mV reference and shuts down to less than 10µA. No load quiescent current of the LT1614 is 1mA and the internal NPN power switch handles a 500mA current with a voltage drop of just 295mV.High frequency switching enables the use of small inductors and capacitors. Ceramic capacitors can be used in many applications, eliminating the need for bulky tantalum types.
The LT1614 is available in 8-lead MSOP or SO packages.
MS-8,SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT1614CMS8#PBF | MSOP | 8 | C | $3.10 | $2.65 |
| LT1614CMS8#TRPBF | MSOP | 8 | C | $2.71 | |
| LT1614CS8#PBF | SO | 8 | C | $2.85 | $2.40 |
| LT1614CS8#TRPBF | SO | 8 | C | $2.46 | |
| LT1614IMS8#PBF | MSOP | 8 | I | $3.55 | $3.00 |
| LT1614IMS8#TRPBF | MSOP | 8 | I | $3.06 | |
| LT1614IS8#PBF | SO | 8 | I | $3.45 | $2.90 |
| LT1614IS8#TRPBF | SO | 8 | I | $2.96 | |
| LT1614CMS8 | MSOP | 8 | C | $6.20 | $5.30 |
| LT1614CMS8#TR | MSOP | 8 | C | $5.42 | |
| LT1614CS8 | SO | 8 | C | $5.70 | $4.80 |
| LT1614CS8#TR | SO | 8 | C | $4.92 | |
| LT1614IS8 | SO | 8 | I | $6.90 | $5.80 |
| LT1614IS8#TR | SO | 8 | I | $5.92 | |
| LT1614IMS8 | MSOP | 8 | I | $7.10 | $6.00 |
| LT1614IMS8#TR | MSOP | 8 | I | $6.12 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.