代理產線

Semtech-SC198A

 2009-02-09

【基本資料】

【產品特性】

Input voltage range — 2.7V to 5.5V
VIN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +7
VOUT (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to VIN +0.3
VLXA and VLXB (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1 to VIN +1
Pin Voltage - All Other Pins (V) . . . . . . . . . -0.3 to (VIN + 0.3) Output Short Circuit to GND Duration . . . . . Co ntinuous
LXA and LXB Currents (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ambient Temperature Range (°C) . . . . . . . . . . . . . -40 to +85
VIN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 to 5.5
Thermal Resistance, Junction to Ambient(2) (°C/W) . . . . 31
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150
Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150
Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260

【產品應用】

Mobile phones

【文字介紹】

The SC198A is a dual high-efficiency synchronous buck converter designed for use in low power applications. Each converter is capable of supplying up to 800mA of average current at one of eight programmable output voltages used as microprocessor supply voltages.

The SC198A uses a single control logic block for the two converters, but their controls can be set independently. The device uses a flexible clocking method allowing the user to set the fixed internal 1MHz oscillator or synchro- nize the clock to an external source. The device also has an optional power-save mode that optimizes efficiency for light loads.

The SC198A provides output voltage flexibility while con- serving board space by using control pins to select the output voltage. This eliminates at least four parts from the traditional dual buck converter bill of materials.