R1211x
∗DELAY Pin Detector Threshold Voltage Test
3.3V
VIN
EXT
VFB
GND DELAY
OSCILLOSCOPE
∗AMP "H" Output Current/"L"
Output Current Test
3.3V
VIN
AMPOUT A
VFB
GND DELAY
1V
0.9V/1.1V
∗UVLO Detector Threshold/Hysteresis Range Test
VIN
EXT
VFB
GND DELAY
OSCILLOSCOPE
∗Soft-start Time Test
C5
C3
Coil
VIN
EXT
AMPOUT
VFB C4 R4
GND DELAY
Diode
NMOS
VOUT
C2 OSCILLOSCOPE
Rout
C1
R1
R3
R2
<Components>
Inductor (L)
Diode (SD)
Capacitors
NMOS Transistor
Resistors
: 22µH (TDK LDR655312T-220)
: CRS02 (Toshiba)
C1:680pF(Ceramic), C2:22µF (Tantalum)+2.2µF (Ceramic),
C3:68µF (Tantalum)+2.2µF (Ceramic), C4:2200pF(Ceramic), C5:22µF(Tantalum)
: IRF7601 (International Rectifier)
: R1: 90kΩ, R2:10kΩ, R3:30kΩ, R4:30kΩ, Rout:1kΩ/330Ω
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