ON Semiconductor MC33063ADR2G

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Item Description: ANA DC-DC.5A SW I REG

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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

© Semiconductor Components Industries, LLC, 2007
February, 2007 − Rev. 19
1 Publication Order Number:
MC34063A/D
MC34063A, MC33063A,
NCV33063A
1.5 A, Step−Up/Down/
Inverting Switching
Regulators
The MC34063A Series is a monolithic control circuit containing the
primary functions required for DC−to−DC converters. These devices
consist of an internal temperature compensated reference, comparator,
controlled duty cycle oscillator with an active current limit circuit,
driver and high current output switch. This series was specifically
designed to be incorporated in Step−Down and Step−Up and
Voltage−Inverting applications with a minimum number of external
components. Refer to Application Notes AN920A/D and AN954/D
for additional design information.
Features
Operation from 3.0 V to 40 V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5 A
Output Voltage Adjustable
Frequency Operation to 100 kHz
Precision 2% Reference
Pb−Free Packages are Available
Figure 1. Representative Schematic Diagram
SQ
R
Q2
Q1
100
I
pk
Oscillator
C
T
Comparator
+
1.25 V
Reference
Regulator
1
2
3
45
6
7
8
Drive
Collector
I
pk
Sense
V
CC
Comparator
Inverting
Input
Switch
Collector
Switch
Emitter
Timing
Capacitor
GND
(Bottom View)
This device contains 51 active transistors.
SOIC−8
D SUFFIX
CASE 751
PDIP−8
P, P1 SUFFIX
CASE 626
1
8
1
8
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
ORDERING INFORMATION
1
Switch
Collector
Switch
Emitter
Timing
Capacitor
GND
Driver
Collector
I
pk
Sense
V
CC
Comparator
Inverting
Input
(Top View)
2
3
45
6
7
8
PIN CONNECTIONS
http://onsemi.com
x = 3 or 4
A = Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G = Pb−Free Package
1
8
3x063AP1
AWL
YYWWG
1
8
33063AVP
AWL
YYWWG
3x063
ALYWA
G
1
8
MARKING
DIAGRAMS
MC34063A, MC33063A, NCV33063A
http://onsemi.com
2
MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply Voltage V
CC
40 Vdc
Comparator Input Voltage Range V
IR
0.3 to +40 Vdc
Switch Collector Voltage V
C(switch)
40 Vdc
Switch Emitter Voltage (V
Pin
1
= 40 V) V
E(switch)
40 Vdc
Switch Collector to Emitter Voltage V
CE(switch)
40 Vdc
Driver Collector Voltage V
C(driver)
40 Vdc
Driver Collector Current (Note 1) I
C(driver)
100 mA
Switch Current I
SW
1.5 A
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
T
A
= 25°C P
D
1.25 W
Thermal Resistance
R
q
JA
100 °C/W
SOIC Package, D Suffix
T
A
= 25°C P
D
625 mW
Thermal Resistance
R
q
JA
160 °C/W
Operating Junction Temperature T
J
+150 °C
Operating Ambient Temperature Range T
A
°C
MC34063A 0 to +70
MC33063AV, NCV33063A −40 to +125
MC33063A 40 to +85
Storage Temperature Range T
stg
65 to +150 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Maximum package power dissipation limits must be observed.
2. This device series contains ESD protection and exceeds the following tests: Human Body Model 4000 V per MIL−STD−883, Method 3015.
Machine Model Method 400 V.
3. NCV prefix is for automotive and other applications requiring site and change control.
MC34063A, MC33063A, NCV33063A
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (V
CC
= 5.0 V, T
A
= T
low
to T
high
[Note 4], unless otherwise specified.)
Characteristics
Symbol Min Typ Max Unit
OSCILLATOR
Frequency (V
Pin
5
= 0 V, C
T
= 1.0 nF, T
A
= 25°C) f
osc
24 33 42 kHz
Charge Current (V
CC
= 5.0 V to 40 V, T
A
= 25°C) I
chg
24 35 42
mA
Discharge Current (V
CC
= 5.0 V to 40 V, T
A
= 25°C) I
dischg
140 220 260
mA
Discharge to Charge Current Ratio (Pin 7 to V
CC
, T
A
= 25°C) I
dischg
/I
chg
5.2 6.5 7.5
Current Limit Sense Voltage (I
chg
= I
dischg
, T
A
= 25°C) V
ipk(sense)
250 300 350 mV
OUTPUT SWITCH (Note 5)
Saturation Voltage, Darlington Connection
(I
SW
= 1.0 A, Pins 1, 8 connected)
V
CE(sat)
1.0 1.3 V
Saturation Voltage (Note 6)
(I
SW
= 1.0 A, R
Pin
8
= 82 W to V
CC
, Forced b ] 20)
V
CE(sat)
0.45 0.7 V
DC Current Gain (I
SW
= 1.0 A, V
CE
= 5.0 V, T
A
= 25°C) h
FE
50 75
Collector Off−State Current (V
CE
= 40 V) I
C(off)
0.01 100
mA
COMPARATOR
Threshold Voltage
T
A
= 25°C
T
A
= T
low
to T
high
V
th
1.225
1.21
1.25
1.275
1.29
V
Threshold Voltage Line Regulation (V
CC
= 3.0 V to 40 V)
MC33063A, MC34063A
MC33063AV, NCV33063A
Reg
line
1.4
1.4
5.0
6.0
mV
Input Bias Current (V
in
= 0 V) I
IB
−20 400 nA
TOTAL DEVICE
Supply Current (V
CC
= 5.0 V to 40 V, C
T
= 1.0 nF, Pin 7 = V
CC
,
V
Pin
5
> V
th
, Pin 2 = GND, remaining pins open)
I
CC
4.0 mA
4. T
low
= 0°C for MC34063A, −40°C for MC33063A, AV, NCV33063A
T
high
= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV, NCV33063A
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
6. If the output switch is driven into hard saturation (non−Darlington configuration) at low switch currents ( 300 mA) and high driver currents
(30 mA), it may take up to 2.0 ms for it to come out of saturation. This condition will shorten the off time at frequencies 30 kHz, and is
magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a
non−Darlington configuration is used, the following output drive condition is recommended:
Forced b of output switch :
I
C
output
I
C
driver – 7.0 mA *
w 10
* The 100 W resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
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