IC Data Sheets
8.
8.
IC Data Sheets
This chapter shows the internal block diagrams and pin
configurations of ICs that are drawn as “black boxes” in the
electrical diagrams (with the exception of “memory” and “logic”
ICs).
8.1
Diagram
, B01, RT7234GSP (IC U701)
Figure 8-1 Internal block diagram and pin configuration
19530_300_130724.eps
130724
Block diagram
Pinning information
RT7234
EN
FB
VREG5
SS
VIN
BOOT
PGND
SW
PGND
2
3
4
5
6
7
8
9
RT7234
VCC*
POR &
Reg
Driver
BOOT
VREG5
Control
VBIAS
On-Time
V
IN
FB
Min.
Off-Time
Ripple
Gen.
V
REF
ZC
Comparator
SS
SW
PGND
EN
VREG5
OC
+
-
-
2µA
V
REG5
UV & OV
SW
FB
VS*
VIN
Comparator
+
-
FB
0.9 x V
REF
PGOOD*
GND*
110m
Ω
30m
Ω