TK11835
ADVANCED INFORMATION
FEATURES
s
Positive-to-Negative Switching Regulator
s
Adjustable Output Voltage
s
Thermal Protection Sensor
s
Broad Operating Voltage Range
s
Miniature Package (SOT-26)
s
Synchronization to External Pulse
POSITIVE TO NEGATIVE DC-DC CONVERTER
APPLICATIONS
s
Cellular Phones
s
Cordless Telephones
s
Radio Control Systems
s
Wireless Communications Systems
s
Battery Operated Equipment
s
Portable Instrumentations
s
Portable Computers
s
Personal Digital Assistants
s
Local Area Network (LAN) Receivers
DESCRIPTION
The TK11835 is a positive to negative switching regulator.
This IC converts a positive input voltage into a regulated
negative output voltage. The maximum regulated output
voltage and current are determined by the choice of the
external transistor and inductor.
The thermal protection feature provides oscillator shut-
down in the event of an overload condition. The wide input
voltage range of 1.8 V to 15 V and a 50 mA base drive
capability for the external transistor allow flexible operation
in a large number of applications.
The TK11835 is available in a miniature SOT-26 surface
mount package.
TK11835
BASE 1
N35
6
5
4
VCC
GND
VREF
IS
2
VFB 3
BLOCK DIAGRAM
ORDERING INFORMATION
TK11835MTL
VREF
VFB
4
-
HYST
COMP
+
+
COMP
1
BASE
-
THERMAL
PROTECTION
5
GND
REFERENCE
VOLTAGE
6
VCC
3
Note: Standard packaging is tape left, 1000 pcs/reel.
IS
2
May, 1997 TOKO, Inc.
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