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| RT9199 Datasheet, PDF (2/13 Pages) Richtek Technology Corporation – Cost-Effective, 2A Peak Sink/Source Bus Termination Regulator | |||
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RT9199
Typical Application Circuit
VCNTL = 5V
VIN = 1.8V
2N7002
EN
R1
VIN
VCNTL
RT9199
REFEN
VOUT
R2
CSS
GND
RTT
CIN CCNTL
COUT RDUMMY
R1 = R2 = 100kΩ, RTT = 50Ω / 33Ω / 25Ω
COUT(MIN) = 10μF (Ceramic) + 1000μF under the worst case testing condition
RDUMMY = 1kΩ as for VOUT discharge when VIN is not presented but VCNTL is presented
CSS = 1μF, CIN = 470μF (Low ESR), CCNTL = 47μF
Test Circuit
VIN = 1.8V
VCNTL = 5V
1.25V
VIN
VCNTL
RT9199
REFEN
VOUT
GND
VOUT
COUT V
IL
Figure 1. Output Voltage Tolerance, ÎVLOAD
VIN = 1.8V
A
VCNTL = 5V
0.9V
VIN
VCNTL
RT9199
REFEN
VOUT
0.15V
GND
RL
VOUT
0.9V
0V
COUT V
RL and COUT
Time deleay
Figure 2. Current in Shutdown Mode, ISTBY
www.richtek.com
2
DS9199-07 September 2007
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