onsemi NCP1550
The NCP1550 is a monolithic micropower high frequency voltage mode step−down controller IC, specially designed for battery operated hand−held electronic products. With appropriate external P−type MOSFET, the device can provide up to 2.0 A loading current with high conversion efficiency. The device operates in Constant−Frequency PWM mode at normal operation, that ensures low output ripple noise, and which will automatically switch to PFM mode at low output loads for higher efficiency.- Min Voltage : 2.45V
- Max Voltage : 5.5V
- Max Operating Temp : 85°C
- Min Operating Temp : -40°C
Source:
Octopart
| Part No. | NCP1550 |
|---|---|
| Datasheet | NCP1550 Download |
| Manufacturer |  onsemi |
| Description | 600 kHz PWM/PFM Step-Down DC-DC Controller |
| Buy | Stock & Price |
FEATURES
● High Efficiency 92%, Typical● Low Quiescent Bias Current of 50 mA (Typical at PFM Mode with No Load)
● Output Voltage Options from 1.8 V to 3.3 V with High Accuracy $2.0%
● Low Output Voltage Ripple, 50 mV, Typical
● PWM Switching Frequency at 600 kHz
● Automatic PWM/PFM Switchover at Light Load Condition
● Very Low Dropout Operation, 100% Max. Duty Cycle
● Chip Enable Pin with On−Chip 150 nA Pullup Current Source
● Low Shutdown Current, 0.3 mA, Typical
● Input Voltage Range from 2.45 V to 5.5 V
● Built−in Soft−Start
● Internal Undervoltage Lockout (UVLO) Protection
● Low Profile and Minimum External Components
● Micro Miniature TSOP−5 Package
● Pb−Free Packages are Available Typical
APPLICATIONS
● Personal Digital Assistant (PDA)● Camcorders and Digital Still Camera
● Hand−Held Instrument
● Distributed Power System
● Computer Peripheral
● Conversion from Four NiMH or NiCd or One Lithium−ion Cells to 3.3 V/1.8 V © Semiconductor Components Industries, LLC, 2006 July, 2006 − Rev.
