MC34163, MC33163
3.4 A, Step-Up/Down/
Inverting Switching
Regulators
The MC34163 series are monolithic power switching regulators that
contain the primary functions required for dc−to−dc converters. This
series is specifically designed to be incorporated in step−up,
step−down, and voltage−inverting applications with a minimum
number of external components.
These devices consist of two high gain voltage feedback
comparators, temperature compensated reference, controlled duty
cycle oscillator, driver with bootstrap capability for increased
efficiency, and a high current output switch. Protective features consist
of cycle−by−cycle current limiting, and internal thermal shutdown.
Also included is a low voltage indicator output designed to interface
with microprocessor based systems.
These devices are contained in a 16 pin dual−in−line heat tab plastic
package for improved thermal conduction.
http://onsemi.com
MARKING
DIAGRAMS
16
MC3x163P
AWLYYWWG
16
PDIP−16 1
P SUFFIX
CASE 648C
1
Features
•
•
•
•
•
•
•
•
•
•
•
•
Output Switch Current in Excess of 3.0 A
Operation from 2.5 V to 40 V Input
Low Standby Current
Precision 2% Reference
Controlled Duty Cycle Oscillator
Driver with Bootstrap Capability for Increased Efficiency
Cycle−by−Cycle Current Limiting
Internal Thermal Shutdown Protection
Low Voltage Indicator Output for Direct Microprocessor Interface
Heat Tab Power Package
Moisture Sensitivity Level (MSL) Equals 1
Pb−Free Packages are Available*
Ipk Sense
8
ILimit
-
9
Driver
Collector
+
16
MC3x163DW
AWLYYWWG
16
SOIC−16W
DW SUFFIX
CASE 751G
1
x
A
WL
YY
WW
G
1
= 3 or 4
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
Timing
Capacitor
+
6
GND
4
Voltage
Feedback 2
14
3
+
+
-
2
Switch
Emitter
VFB
1
3
14
13
12
Timing Capacitor
6
11
7
10
8
9 Driver Collector
Switch
Emitter
GND
Switch Collector
(Top View)
15
ORDERING INFORMATION
LVI
LVI Output
15
Ipk Sense
GND
13
+
2
GND
12
Control Logic
and Thermal
Shutdown
Voltage Feedback 2
VCC
11
OSC
16 Bootstrap Input
5
Switch
Collector
1
Voltage Feedback 1
10
7
5
Voltage
Feedback 1
LVI Output
4
VCC
+
+
-
16
Bootstrap
Input
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
+
*For additional information on our Pb−Free strategy
and soldering details, please download the
ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
(Bottom View)
This device contains 114 active transistors.
Figure 1. Representative Block Diagram
© Semiconductor Components Industries, LLC, 2008
August, 2008 − Rev. 6
1
Publication Order Number:
MC34163/D
