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PDF MC34063AB Data sheet ( Hoja de datos )
| Número de pieza | MC34063AB | |
| Descripción | DC-DC converter control circuits | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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DIP-8
SO-8
Features
Output switch current in excess of 1.5 A
2 % reference accuracy
Low quiescent current: 2.5 mA (typ.)
Operating from 3 V to 40 V
Frequency operation to 100 kHz
Active current limiting
MC34063AB, MC34063AC,
MC34063EB, MC34063EC
DC-DC converter control circuits
Datasheet - production data
Description
The MC34063A/E series is a monolithic control
circuit which delivers the main functions for DC-
DC voltage converting.
The device contains an internal temperature
compensated reference, comparator, duty cycle
controlled oscillator with an active current limit
circuit, driver and high current output switch.
Output voltage is adjustable through two external
resistors with a 2% reference accuracy.
Employing a minimum number of external
components, the MC34063A/E device series is
designed for step-down, step-up and voltage-
inverting applications.
DIP-8
MC34063ABN
MC34063ACN
MC34063EBN
MC34063ECN
Table 1. Device summary
Order codes
SO-8
MC34063ABD-TR
MC34063ACD-TR
MC34063EBD-TR
MC34063ECD-TR
April 2013
This is information on a product in full production.
DocID5257 Rev 11
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MC34063AB, MC34063AC, MC34063EB, MC34063EC
3 Maximum ratings
Maximum ratings
Note:
Table 3. Absolute maximum ratings
Symbol
Parameter
VCC
VIR
VSWC
VSWE
VCE
VDC
IDC
ISW
PTOT
TJ
TSTG
TOP
Power supply voltage
Comparator input voltage range
Switch collector voltage
Switch emitter voltage (VSWC = 40V)
Switch collector to emitter voltage
Driver collector voltage
Driver collector current
Switch current
Power dissipation at TA = 25°C
for DIP-8
for SO-8
Operating junction temperature
Storage temperature range
Operating ambient temperature
range
for AC and EC
series
for AB series
for EB series
Value
50
-0.3 to 40
40
40
40
40
100
1.5
1.25
0.625
150
-40 to 150
0 to 70
-40 to 85
-40 to 125
Unit
V
V
V
V
V
V
mA
A
W
°C
°C
°C
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 4. Thermal data
Symbol
Parameter
DIP-8
RthJA Thermal resistance junction-ambient (1)
100
RthJC Thermal resistance junction-case
42
1. This value depends from thermal design of PCB on which the device is mounted.
SO-8
160
20
Unit
°C/W
°C/W
DocID5257 Rev 11
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5 Page 
MC34063AB, MC34063AC, MC34063EB, MC34063EC
Typical application circuit
Figure 15. Step-down converter
Figure 16. Printed evaluation board
PIN 1 = VOUT
PIN 2 = GND
PIN 3 = GND
PIN 4 = VIN
Test
Line regulation
Load regulation
Output ripple
Efficiency
ISC
Table 10. Test condition (VOUT = 5 V)
Conditions
VIN = 15 to 25 V, IO = 500 mA
VIN = 25 V, IO = 50 to 500 mA
VIN = 25 V, IO = 500 mA
VIN = 25 V, IO = 500 mA
VIN = 25 V, RLOAD = 0.1
Value (typ.)
5
30
100
80
1.2
Unit
mV
mV
mV
%
A
DocID5257 Rev 11
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11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet MC34063AB.PDF ] | |
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