ADP1875 Analog Devices, ADP1875 Datasheet - Page 18

• Manufacturer Part Number: ADP1875
• Description: Synchronous Buck Controller with Constant On-Time, Valley Current Mode, and Power Saving Mode
• Manufacturer: Analog Devices

ADP1874/ADP1875
ADP1874/ADP1875 BLOCK DIGRAM
VREG_IN
TRACK
COMP
VREG
EN
SS
FB
I
SS
ERROR
AMP
REF_ZERO
EN_REF
PRECISION
ENABLE
LOWER
CLAMP
COMP
SS_REF
ADP1874/ADP1875
0.6V
REF_ZERO
SS
COMP
LDO
AND REFERENCE
AMP
PWM
CS
BIAS BLOCK
Figure 64. ADP1874/ADP1875 Block Diagram
REF
PSM
GND
TO ENABLE
ALL BLOCKS
IREV
COMP
CS GAIN SET
Rev. 0 | Page 18 of 44
INFORMATION
t
TON
BG_REF
IN_PSM
IN_SS
IN_HICC
PWM
IREV
ON
ADC
MACHINE
RES
TIMER
STATE
VREG
HS_O
LS_O
SW
RES DETECT AND
GAIN SET
SW
HS
LS
690mV
530mV
600mV
FB
C
VREG
I
0.4V
LEVEL
R (TRIMMED)
SHIFT
SW FILTER
t
ON
= 2RC(V
HS
LS
OUT
VREG
/V
IN
)
300kΩ
800kΩ
8kΩ
PGOOD
VIN
BST
DRVH
SW
DRVL
PGND