UR5515 Datasheet, PDF (4/8 Pages) Unisonic Technologies – 1.5A/3A BUS TERMINATION REGULATOR

UR5515
TEST CIRCUITS
CMOS IC
1.25V
2.5 V
3.3V
VIN
VCNTL
V_REF
UTC
UR5515
GND
V_OUT
VOUT
V
IL COUT
Fig1. Output Voltage Tolerance, ^{¶ V}OUT


2.5V
3.3 V
1.25V
VIN _UTC V_CNTL
UR5515 ^VOUT
V_REF
GND
V_OUT
A
V
I_{L COUT}
3.3V
2.5V V
1.25V
0.2V
V_{IN UTC} V_CNTL
1.25V
UR5515
VOUT
V_{REF GND} VOUT
0V
R_L
V
COUT
R_Land C_OUT
Time delay
Fig 2. Current in Shutdown Mode, ISHCLN


Power supply
with current limit
1.25V
2.5V
3.3V A
VIN _UTC VCNTL
UR5515
V_REF
V_OUT
I_L
V_OUT
GND
C_OUT
V
Fig 3. Current Limit for HIgh Side, I_CLHIGH




3.3V
2.5V
1.25V
V_REF 0.2V
1.25V
VIN _UTC V_CNTL
V_REF ^{UR5515 VOUT}
GND
R_L
V_OUT
V
COUT
V_{OUT 0V}
V_OUT would be low if V_{REF < 0.2V}
VOUT would be high if V_{REF > 0.8V}
R_L and COUT
Time delay
Fig 5. V_REF Pin Shutdown Threshold Voltage


Fig 4. Current Limit for Low Side, I_CLLOW

UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-056,A