CR-F33T Datasheet, PDF (1/11 Pages) List of Unclassifed Manufacturers – PFM STEP-UP DC/DC CONVERTER

Preliminary Specification ^CR-F33T
PFM STEP-UP
TM
DC/DC CONVERTER
GENERAL DESCRIPTION
BLOCK DIAGRAM
The CR-F33T is a PFM step-up DC/DC
converter IC and has a high efficiency. ^VDD
LX
These devices consist of a bandgap, a
Bandgap
Digital
Control
comparator, an oscillator, a driver, and a
high current output switch.
FB
The CR-F33T provides a higher fixed
voltage from the smaller input voltage.
Clock
Select
VSSA
The CR-F33T is used for single- or
dual-cell battery operation.
EN
150KHz
OSC
VSS
FEATURES
z Low Voltage Operation Possible
z Low Supply Current
z Small Number of External
Components
z Internal Power Switch
APPLICATIONS
z Battery-Powered Instruments
z Hand-Held Instruments
z Hand-Held Communication
Instruments
z Cameras
PIN CONFIGURATION
SOP-8
(Top View)
VDD 1
8 LX
FB ²
EN ³
7 VSSA
6 VSS
NC 4
5 NC
SOT-89-3
(Top View)
123
VSS VDD LX
ORDERING INFORMATION
CR-FXXX
Step-up
Package
P: SOP-8
T: SOT-89-3
Output Voltage
33 : 3.3V
1