Order this document by MC34163/D
Power 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.
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Output Switch Current in Excess of 3.0 A
MC34163
MC33163
POWER SWITCHING
REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
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16
1
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
P SUFFIX
PLASTIC PACKAGE
CASE 648C
(DIP–16)
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SOP–16L)
Representative Block Diagram
Driver
Collector
PIN CONNECTIONS
9
LVI Output
Voltage Feedback 2
10
Voltage Feedback 1
Switch
Collector
11
Gnd
5
Timing Capacitor
6
7
8
(Top View)
Switch
Emitter
15
Device
16
Bootstrap
Input
MC34163DW
MC34163P
MC33163DW
MC33163P
TA = – 40° to +85°C
12
11
10
Switch Collector
1
2
3
4
16 Bootstrap Input
15
14
13
Gnd
Switch
Emitter
Ipk Sense
8
–
+
ILimit
VCC
Timing
Capacitor
7
+
6
OSC
5
Gnd
4
Voltage
Feedback 1
Voltage
Feedback 2
LVI Output
3
Control Logic
and Thermal
Shutdown
+
12
Gnd
13
14
VCC
Ipk Sense
9 Driver Collector
2
LVI
1
+
+
–
+
+
–
VFB
ORDERING INFORMATION
Operating
Temperature Range
TA = 0° to +70°C
Package
SOP–16L
DIP–16
SOP–16L
DIP–16
Rev 2
+
(Bottom View)
This device contains 114 active transistors.
©
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
1
ONSEMI [ ON SEMICONDUCTOR ]
