February, 1995 TOKO, Inc.
TK115xx
Page 1
10-15-94
APPLICATIONS
I
Cordless Telephones
I
Pagers
I
Battery Powered Systems
I
Personal Communications Equipment
I
Portable Instrumentation
I
Radio Control Systems
I
Toys
I
Low Voltage Systems
I
Portable Consumer Equipment
FEATURES
I
Low Dropout Voltage
I
Pass Transistor Terminals Available
I
Very Low Standby Current ( ON, No Load)
I
Very Low (<200 nA) Current in OFF Mode
I
Low Output Noise
I
Internal Thermal Shutdown
I
Short Circuit Protection
I
Available on Tape and Reel
DESCRIPTION
The TK115xx series devices are low power, linear regu-
lators with electronic ON/OFF switches. Both active HIGH
and active LOW control pins are provided.
An internal PNP pass-transistor is used in order to achieve
low dropout voltage (typically 200 mV at 80 mA load
current). A base drive is available at pin 7 for connection
of an external pass transistor should higher current (up to
1 A) or lower dropout voltage is required.
VOLTAGE REGULATOR WITH ON/OFF SWITCH
TK115 M
Voltage Code
Tape/Reel Code
TAPE/REEL CODE
BX : Bulk/Bag
TL : Tape Left
MG: Magazine
ORDERING INFORMATION
VOLTAGE CODE
30 = 3.0 V
32 = 3.25 V
35 = 3.5 V
37 = 3.75 V
40 = 4.0 V
45 = 4.5 V
47 = 4.75 V
50 = 5.0 V
55 = 5.5 V
80 = 8.0 V
S
S
S
S
S
S
S
S
S
S
V
O
V
IN
C(LC)
GND
KT115xx BD01
TK115xx
REFERENCE
VOLTAGE
–
+
VADJ
BASE
CHIGH
(HC)
–
+
S
S
S
S
THERMAL
PROTECTION
S
S
2
1
3
6
5
7
8
BLOCK DIAGRAM
TK115xxM
An internal thermal shutdown circuit limits the junction
temperature to below 150
°
C. The load current is internally
monitored, and the device will shut down in the presence of
a short circuit at the output.
The TK115xx series is available in plastic surface mount
SOP-8 packages.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .........................................................16 V
Load Current .......................................................180 mA
Power Dissipation (Note 1) ................................600 mW
Storage Temperature Range ...................-55 to +150
°
C
Operating Temperature Range ..................-30 to +80
°
C
Lead Soldering Temp. (10 sec.)........................... 260
°
C
Junction Temperature .......................................... 150
°
C
Note 1: Derate output power by 4.8 mW/
°
C for operation
above 25
°
C.
A21
1
2
3
4
HIGH CONTROL
LOW CONTROL
NC
GND
8
7
6
5
BASE
V
ADJ
KT115xxM PO
V
O
V
IN