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Part Number: SC339
Description: The SC339 is an ultra-low output voltage, linear power supply controller designed to simplify power ma...
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SC339
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General Description
SC339 General Description
The SC339 is an ultra-low output voltage, linear power supply controller designed to simplify power management for notebook PCs. It is part of Semtech's Smart LDOTM family of products. The SC339 has a user adjustable output that can be set anywhere between 0.5V and 3.3V using two external resistors.
SC339 features include tight output voltage regulation (± 1% over 0°C to +85°C), enable control, open drain power good signal, under-voltage protection and soft-start. The enable pin allows the part to enter a very low power standby mode. Pulling it high enables the output. The power good pin is an open drain and asserts low when the voltage at the adjust pin is below 88% (typ) of nominal. If the voltage at the adjust pin is below 50% (typ) of nominal, the undervoltage protection circuitry will shut down the output. The SC339 is available in a tiny SOT-23 6-pin surface mount package.
SC339 Maximum Ratings
| Parameter |
Symbol |
Maximum |
Units |
| Input Supply Voltage |
VIN |
-0.3 to +6 |
V |
| Drive Pins |
VDRV |
-0.3 to VIN + 0.3V |
V |
| Adjust and Power Good Pins |
VADJ , VPGD |
-0.3 to VIN + 0.3V |
Vs |
| Enable Pins |
VEN |
-0.3 to VIN + 0.3V |
V |
| Thermal Impedance Junction to Ambient |
JA |
190 |
°C/W |
| Thermal Impedance Junction to Case |
JC |
81 |
°C/W |
| Operating Ambient Temperature Range |
TA |
-40 to +85 |
°C |
| Operating Junction Temperature Range |
TJ |
-40 to +125 |
°C |
| Storage Temperature Range |
TSTG |
-65 to +150 |
°C |
| Lead Temperature (Soldering) 10 Sec. |
TLEAD |
300 |
°C |
| ESD Rating (Human Body Model) |
VESD |
2 |
°C |
SC339 Features
± 1% Voltage Accuracy Over-Temperature
Low Shutdown Current
Runs Off 5V Supply
Ultra-Fast Transient Response
Enable Control for the Output
Power Good Monitoring and Signaling for the Output
Gate Drive from Input Supply Enables Use of N-Channel MOSFET
User Selectable Dropout Voltage
Under-Voltage Protection for the Output
SOT-23 6-pin Surface Mount Package
Compatible with Ceramic Capacitors
Low Ripple Output
Internal 1ms soft-start requires no external components
Fully WEEE and RoHS compliant
Low Shutdown Current
Runs Off 5V Supply
Ultra-Fast Transient Response
Enable Control for the Output
Power Good Monitoring and Signaling for the Output
Gate Drive from Input Supply Enables Use of N-Channel MOSFET
User Selectable Dropout Voltage
Under-Voltage Protection for the Output
SOT-23 6-pin Surface Mount Package
Compatible with Ceramic Capacitors
Low Ripple Output
Internal 1ms soft-start requires no external components
Fully WEEE and RoHS compliant
SC339 Typical Application
Notebook PCs
Desktop Computers
Battery Powered Devices
Portable Instruments
Desktop Computers
Battery Powered Devices
Portable Instruments
SC339 Connection Diagram
SC339
PDF/DataSheet Download
- Datasheet: SC339
- File Size: 762005 KB
- Manufacturer: Semtech Corporation
- Click here to Download
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