UNISONIC TECHNOLOGIES CO., LTD
UR5516A
LINEAR INTEGRATED CIRCUIT
1 of 8
Copyright © 2022 Unisonic Technologies Co., Ltd
QW-R101-018.C
3A BUS TERMINATION
REGULATOR
DESCRIPTION
The UTC UR5516A is designed to provide a regulated voltage
with bi-directional output current for DDR-SDRAM termination.
Current-limit work to limit the short-circuit current, on-chip thermal
shutdown provides protection against any combination of overload
that would create excessive junction temperature. The output voltage
tracks the voltage at V
REF
pin. A resistor divider connected to V
IN
,
GND and V
REF
pins is used to provide a half voltage of V
IN
to V
REF
pin. In addition, an external ceramic capacitor and an open-drain
transistor connected to V
REF
pin provides soft-start and shutdown
control respectively. Pulling and holding the V
REF
to GND shuts off
the output. The output of UTC UR5516A will be high impedance
after being shut down by V
REF
or thermal shutdown function.
FEATURES
* Provide bi-direction current
- Sourcing or sinking current up to 3A
* 1.25V/0.9V output for DDR I/II applications
* Fast transient response
* High output accuracy
- ±20mv over load, V
OUT
offset and temperature
* Adjustable output voltage by external resistors
* Current-limit protection
* On-chip thermal shutdown
* Shutdown for standby or suspend mode
HSOP-8
ORDERING INFORMATION
Ordering Number
Package Packing
Lead Free Halogen Free
UR5516AL-SH2-R UR5516AG-SH2-R HSOP-8 Tape Reel
MARKING
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