RT7274/79/80/81
Function Block Diagram
For TSSOP-14 (Exposed Pad) Package
BOOT
PVCC
Internal
VINR
Regulator
Over Current
Protection
PVCC
VIN
PVCC
VIBIAS
V
REF
UGATE
LGATE
Switch
Controller
GND
SW
Driver
SW
Under & Over
Voltage Protection
VOUT
PGND
PGOOD
Discharge
PVCC
Ripple
Gen.
0.9 V
2µA
REF
+
+
FB
SS
FB
PGOOD
Comparator
FB
Comparator
EN
On-Time
EN
For SOP-8 (Exposed Pad) Package
BOOT
PVCC
Internal
Regulator
Over Current
Protection
PVCC
VIN
PVCC
VIBIAS
V
REF
UGATE
GND
Switch
Controller
SW
Driver
SW
LGATE
PVCC
2µA
Ripple
Gen.
+
SS
FB
FB
Comparator
On-Time
EN
EN
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS7274/79/80/81-01 February 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
