UR5516 Datasheet, PDF (6/9 Pages) Unisonic Technologies – 3A BUS TERMINATION REGULATOR

UR5516
APPLICATIONS CIRCUIT
1. General Application
V_CNTL
+5V
LINEAR INTEGRATED CIRCUIT

VIN
+1.8V
V_REFIN
+1.8V
R₁
1k
R2
1k
VREF
CSS
0.1uF
GND
R₂
V_OUT = V_REFIN · _R1+R2 (V)
2. For V_OUT=1.25V/0.9V
VIN
VCNTL
VREF _GND VOUT
CIN
22uF
C_CNTL
1uF
V_OUT
1.2V/-2 ~ +1.8A
C_OUT
100uF
GND
V_CNTL
+3.3V
V_IN
+2.5V/1.8V
C_IN
470uF
Shutdown
R1
1k
R₂
Q1
1k
VIN
VCNTL
VREF _GND VOUT
VREF
CSS
0.1uF
C_CNTL
47uF
GND
COUT : 470ȰF, ESR=25mȤ
R ₁, R₂ : 1kȤ, 1%
Q 1 : APM2300 AC
Note : Since R1 and R2 are very small, the voltage offset
caused by the bias current of V REF can be ignore.
V_OUT
+1.25V/0.9V
-3 ~ +3A
C_OUT
470uF
GND


3. For V_OUT=1.4V
V_CNTL
+5V
V_IN
+2.8V
CIN
470uF
GND
VIN
VCNTL
R1
1k
VREF _GND VOUT
VREF
R₂
CSS
1k
0.1uF
C_CNTL
47uF
V_OUT
+1.4V/
-3 ~ +3A
C_OUT
470uF
GND



UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 9
QW-R101-015,B