SC1110
SC1110 is SINK AND SOURCE DC/DC CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS manufactured by SEMTECH.
DESCRIPTION
The SC1110 is a low-cost, full featured, synchronous voltage-mode controller designed to generate termination voltage in double data rate (DDR) memory systems and other applications where wide data bus need to be actively terminated. Synchronous control of the MOSFET half bridge allows power flowing bidirectionally. The termination voltage can be tightly regulated to track the chipset voltage, i.e. to be exactly 50% of that at all times. The SC1110 is ideal for low cost implementation of termination voltage supplies. SC1110 Features include temperature pensated voltage reference, triangle wave oscillator and current sense parator circuitry, and allows the use of inexpensive N-channel power switches. The SC1110 operates at a fixed 250k Hz, providing an optimum promise between efficiency, transient performance, external ponent size, and cost.
Features
- = Generates termination voltages for active termina- = 1% set point accuracy
- = For ±7A output current, transient regulation is bet- = VREFIN pin available
- = Buffered VREFOUT for system usage
- = RDSON sensing for over current protection in hiccup
- = Soft start and logic input enabling
- = 250k Hz switching for best transient and efficiency
- = Gate drive capable for 0.5A sourcing and sinking APPLICATIONS
- = For DDR memory systems
- = For active termination schemes in high speed logic systems performance mode ter than ±80m V tion schemes
ORDERING INFORMATION
DEVICE
(1)
PACKAGE SO-14
TEMP. RANGE (TJ) 0
- 125°C
SC1110CSTR Note:
TYPICAL APPLICATION CIRCUIT
REFOUT
(1) Only available in tape and reel packaging. A reel contains 2500 devices.
+5Vcc
+
R1 5k
C1 0.01
R2 1.24k C2 0.1
R3 10
U1 SC1110 VCC REFOUT 14
R4...
