XCM519 Datasheet, PDF (26/49 Pages) Torex Semiconductor – 600mA Synchronous Step-Down DC/DC Converter + Low Voltage Input LDO

XCM519 Series
˙TEST CIRCUITS (Continued)
< Circuit No.10 >
VIN1
EN1
Lx
DCOUT
AGND
PGND
A
VBIAS
VROUT
A
SW2
A
VIN2
V
SW1
A
V
V
EN2
VSS
CL2
4.7uF
V
CIN2
1.0uF CBIAS 1.0uF
< Circuit No.11 >
SW1
SW2
V
V
VIN1
EN1
Lx
DCOUT
AGND
PGND
VBIAS
VROUT
VIN2
EN2
CIN2 1.0uF CBIAS 1.0uF
SW3
SW4
VSS
CL2
4.7uF
V
A
RL
< Circuit No.12 >
V
VIN1
EN1
Lx
DCOUT
AGND
PGND
Waveform
measure
VBIAS
VROUT
A
Waveform
VIN2
measure
EN2
V
V
CIN2 1.0uF CBIAS 1.0uF
VSS
CL2
4.7uF
V
RL
* For the timing chart, please refer to <Soft-start> on page 20.
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