Ap1605, Typical application circuit, Pwm/pfm dual-mode step-down switching regulator – Diodes AP1605 User Manual
Page 5: 1 ) normal application, 2 ) application with short circuit protection
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![background image](/manuals/306199/5/background.png)
AP1605
PWM/PFM DUAL-MODE STEP-DOWN SWITCHING
REGULATOR
AP1605 Rev. 2
5 of 8
FEBRUARY 2009
©
Diodes Incorporated
Typical Application Circuit
(1) Normal Application
+
-
C
C
R
A
R
B
D1
OUT
V
SS
FB
PV
CC
SW
V
CC
R
VCC
C
VCC
AP1605
=~200K
CE
R
CE
C
CE
)
R
R
(1
VFB
Vout
B
A
+
×
=
100K
0.1uF
(2) Application with Short Circuit Protection
AP 1605
+
-
V
SS
CE
C
C
R
A
R
B
D1
V
OUT :
1.8V
FB
PV
CC
SW
V
CC
D
VCC
1N4148 for above 5V Vin and
Schottky for below
5V Vin
C
VCC
0.1uF
C
PVCC
100 uF
C
ON /OFF
0.2uF
R
ON /OFF
3.5M
R
Bias
10 M
R
SENCE
1M
C
OUTPUT
100 uF
V
IN :
2.5V~7V
)
R
R
(1
VFB
Vout
B
A
+
×
=
=~10K
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