mc33468sn-20atr ON Semiconductor, mc33468sn-20atr Datasheet

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mc33468sn-20atr

Manufacturer Part Number
mc33468sn-20atr
Description
Variable Frequency Micropower Dc-to-dc Converter
Manufacturer
ON Semiconductor
Datasheet
Variable Frequency
Micropower Step-up DC-DC
Converter
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 A typical.
amplifier, an oscillator, a variable frequency modulation (VFM) controller, a
drive pin (EXT) for an external transistor, and feedback resistors.
inductor, a diode, a capacitor, a drive transistor, and feed–back resistors can
have an output of 30V.
MC33468 Features:
* “XX” denotes the lot number.
ORDERING INFORMATION
PIN DESCRIPTION
MOTOROLA ANALOG IC DEVICE DATA
MC33468SN–20ATR
Pin No.
The MC33468 is a micropower step–up switching voltage regulator,
The MC33468 features a highly accurate voltage reference, an error
The Vout pin is fixed at 2V in the IC. The output of the converter with an
Low Quiescent Bias Current of 3.0 A
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
1
2
3
4
5
Device
EXT
Symbol
V DD
V OUT
GND
V DD
EXT
3
2
NC
Representative Block Diagram
Drive
Oscillator
Voltage
Output
Ground
Input
External Transistor Drive
No Connection
Voltage Output Pin (Fixed at 2V)
2.0
Marking
0KXX*
Description
V ref
Reel
Size
1
7”
Gnd
Width
V OUT
8 mm
5
Tape
Quantity
3000
MICROPOWER DC–to–DC
VARIABLE FREQUENCY
Ground
MC33468
EXT
Vdd
PIN CONNECTIONS
SEMICONDUCTOR
TECHNICAL DATA
Order this document by MC33468/D
CONVERTER
PLASTIC PACKAGE
1
2
3
(SOT–23–5)
CASE 1212
N SUFFIX
1
(Top View)
5
5
4
V OUT
N/C
1

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mc33468sn-20atr Summary of contents

Page 1

... Low Startup Voltage of 0 Load Output Voltage Set With External Resistors Operating Temperature Range: – +85 C Surface Mount Package ORDERING INFORMATION Output Voltage Device Marking MC33468SN–20ATR 2.0 0KXX* * “XX” denotes the lot number. PIN DESCRIPTION Pin No. Symbol 1 GND ...

Page 2

MAXIMUM RATINGS ( unless otherwise noted.) Rating Power Supply Voltage (Transient) Power Supply Voltage (Operating) External Pin Voltage EXT Pin Source/Sink Current Power Dissipation and Thermal Characteristics N Suffix, Plastic Package Case 1212 (SOT–23–5) Maximum Power ...

Page 3

OUT A EXT GND OUT EXT GND OUT EXT GND MOTOROLA ANALOG IC DEVICE DATA MC33468 B A Oscilloscope D A Figure 3. Test Circuit Schematics V DD ...

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DEFINITIONS Quiescent Bias Current – Current which is used to operate the switching regulator chip and is not delivered to the load. Leakage Current – Current drawn through a transistor junction, under a specified collector voltage, when the transistor is ...

Page 5

Figure 6. Typical 2.0 V Application with MOSFET input voltage is high enough, higher efficiency may be obtained by using a MOSFET as the switch transistor, in which no gate resistor or capacitor is needed. Figure 7. ...

Page 6

0. Recommended Footprint for Surface Mount Applications 6 MC33468 OUTLINE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 1212–01 (SOT–23) ISSUE ...

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MOTOROLA ANALOG IC DEVICE DATA MC33468 NOTES 7 ...

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Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of ...

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