MC33468 Просмотр технического описания (PDF) - Motorola => Freescale
Номер в каталоге
Компоненты Описание
производитель
MC33468 Datasheet PDF : 8 Pages
| |||
Order this document by MC33468/D
Variable Frequency
Micropower Step-up DC-DC
Converter
The MC33468 is a micropower step–up switching voltage regulator,
specifically designed for handheld and pager applications, to provide a
regulated output voltage using a minimum of external parts. This device
features a quiescent bias current of 3.0 µA typical.
The MC33468 features a highly accurate voltage reference, an error
amplifier, an oscillator, a variable frequency modulation (VFM) controller, a
drive pin (EXT) for an external transistor, and feedback resistors.
The Vout pin is fixed at 2V in the IC. The output of the converter with an
inductor, a diode, a capacitor, a drive transistor, and feed–back resistors can
have an output of 30V.
MC33468 Features:
• Low Quiescent Bias Current of 3.0 µA
• High Output Voltage Accuracy of ±2.5%
• Low Startup Voltage of 0.8 V at No Load
• Output Voltage Set With External Resistors
• Operating Temperature Range: –40°C to +85°C
• Surface Mount Package
ORDERING INFORMATION
Device
Output
Voltage Marking
Reel
Size
Tape
Width Quantity
MC33468SN–20ATR
2.0
0KXX*
7”
* “XX” denotes the lot number.
8 mm
3000
PIN DESCRIPTION
Pin No.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 4
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 5
Symbol
GND
VDD
EXT
NC
VOUT
Description
Ground
Input
External Transistor Drive
No Connection
Voltage Output Pin (Fixed at 2V)
Representative Block Diagram
2
VDD
3
Drive
EXT
5
VOUT
Oscillator
MC33468
VARIABLE FREQUENCY
MICROPOWER DC–to–DC
CONVERTER
SEMICONDUCTOR
TECHNICAL DATA
5
1
N SUFFIX
PLASTIC PACKAGE
CASE 1212
(SOT–23–5)
PIN CONNECTIONS
Ground 1
Vdd 2
EXT 3
5 VOUT
4 N/C
(Top View)
Vref
1 Gnd
MOTOROLA ANALOG IC DEVICE DATA
1
Share Link: 