MC34163_08 Datasheet, PDF (1/16 Pages) ON Semiconductor – 3.4 A, Step-Up/Down/ Inverting Switching Regulators

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.
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*
I_pk Sense 8
V_CC ⁷
Timing
Capacitor
6
- ^ILimit
+
+
OSC
9
Driver
Collector
10
Switch
Collector
11
5
GND
4
Control Logic
and Thermal
Shutdown
+
12
GND
13
Voltage
Feedback 1
3
Voltage
Feedback 2
2
VFB
+
+
-
LVI
LVI Output 1
+
+
-
+
14
Switch
Emitter
15
16
Bootstrap
Input
(Bottom View)
This device contains 114 active transistors.
Figure 1. Representative Block Diagram
© Semiconductor Components Industries, LLC, 2008
1
August, 2008 − Rev. 6
16
1
http://onsemi.com
MARKING
DIAGRAMS
16
PDIP−16 ¹
P SUFFIX
CASE 648C
MC3x163P
AWLYYWWG
16
16
1
MC3x163DW
AWLYYWWG
SOIC−16W
DW SUFFIX
CASE 751G ¹
x = 3 or 4
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
LVI Output 1
Voltage Feedback 2 2
Voltage Feedback 1 3
4
GND
5
Timing Capacitor 6
V_{CC 7}
I_pk Sense 8
16 Bootstrap Input
15 _Switch
14 ^Emitter
13
GND
12
11
Switch Collector
10
9 Driver Collector
(Top View)
ORDERING INFORMATION
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.
Publication Order Number:
MC34163/D