TOKO TK11051MTL Datasheet
TK11051
01S
TEMPERATURE CONTROLLER IC
FEATURES
■ Internal Temperature Sensor, Voltage Reference
and Comparator
■ Temperature Threshold and Hysteresis Set by Only
Two External Resistors
■ Output Logic: High to Low with Increasing Temp.
■ Active High On/Off Control
■ 2.7 to 6.0 V Supply Range
■ Miniature Package (SOT-23L-6)
■ Minimum External Parts Count
■ Low Power Consumption
■ Very Wide Temperature Range
DESCRIPTION
The TK11051 is an accurate temperature controller IC for
use over the -30 to +105 °C temperature range. The
TK11051 monolithic bipolar integrated circuit contains a
temperature sensor, stable voltage reference and a
comparator, making the device very useful as an on/off
temperature controller. Two external resistors easily set
the sensing temperature threshold and hysteresis. Its wide
operating voltage range of 2.7 to 6.0 V makes this IC
suitable for a number of applications requiring accurate
temperature control. The device is in the “on” state when
the control pin is pulled to a logic high level.
APPLICATIONS
■ Home and Industrial Thermostats
■ Home Appliance Temperature Control
■ Notebook Computer Temperature Monitor
■ Pentium Processor Temperature Monitor
■ Power Supply Overtemperature Protection
■ Copy Machine Overtemperature Protection
■ System Overtemperature Protection
TK11051
V
CONT
V
CC
V
REF
COMP OUT
GND
COMP IN
The TK11051 is available in a miniature SOT-23L-6 surface
mount package.
BLOCK DIAGRAM
ORDERING INFORMATION
V
CONT
TK11051MTL
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
January 1999 TOKO, Inc. Page 1
V
REF
COMP IN
ON/OFF
CIRCUIT
VOLTAGE
REFERENCE
V
PTAT
+
-
TEMPERATURE
SENSOR
V
CC
COMP OUT
GND
TK11051
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 12 V
Power Dissipation (Note 1) ................................ 200 mW
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range .................-30 to +105 °C
TK11050 ELECTRICAL CHARACTERISTICS
Test conditions: TA = 25 °C, V
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
= 3.0 V, V
CC
CONT
= 2.4 V, I
Operating Voltage Range................................. 2.7 to 6 V
Junction Temperature .......................................... 150 °C
Lead Soldering Temperature (10 s) ..................... 235 °C
= 40 µA, R3 = 100 kΩ, unless otherwise specified.
OUT
I
CC
I
YBTS
V
TATP
T
C
T
RRE
C
HL
C
LL
I
BI
I
HS
I
TUO
V
fer
V
fer
)4etoN(
tnerruCtnecseiuQ
HGIHtuptuOrotarapmoC012053Aµ
tnerruCybdnatSV
egatloVrosneSerutarepmeT
tneiciffeoCerutarepmeTT
rorrEerutarepmeTT
≤ V6.01Aµ
TNOC
T
A
T
A
T
A
A
A
C°52=291.1V
C°58=234.1V
C°03-=279.0V
C°58ot0=0.4C°/Vm
)2etoN(,C°58ot0=0.4-00.4C°
HGIHtuptuOrotarapmoC)3etoN(8.2V
WOLtuptuOrotarapmoCR
tnerruCsaiBtupnIV>NIrotarapmoC
tnerruCteSsiseretsyHV<NIrotarapmoC
tnerruCkniStuptuOC
≥ k01 Ω )3etoN(,3.0V
3
TATP
TATP
≤ V3.003003Aµ
LL
SCITSIRETCARAHCLANIMRET
egatloVecnerefeRT
A
C°52=6.1V
1.03.0Aµ
9.052.16.1Aµ
WOLtuptuOrotarapmoC052053Aµ
I
fer
geReniLnoitalugeReniLV
geRdaoLnoitalugeRdaoLI
tnerruCtuptuOecnerefeRR
1R+2
CC
TUO
k04= Ω 04005Aµ
V6ot3=28Vm
Aµ005ot0=18Vm
SNOITACIFICEPSLANIMRETLORTNOC
I
TNOC
V
V
Note 1: Power dissipation is 200 mW when in Free Air. Derate at 1.6 mW/°C for operation above 25 °C.
Note 2: The resistance values of R1 and R2 can be calculated as follows: R1 = V
Note 3: When V
Note 4: V
)NO(TNOC
)FFO(TNOC
R1 x IIB - T
PTAT
SET x TC). IIB
< COMP IN, COMP OUT > 2.8 V (High Level). When V
PTAT
does not have an output pin.
tnerruClortnoC15.36Aµ
)NO(egatloVlortnoCNOtuptuO8.1V
)FFO(egatloVlortnoCFFOtuptuODNG6.0V
x T
/ (T
is 0.1 µA and ISH is 1.25 µA.
ref
SH
> COMP IN, COMP OUT < 0.3 V (Low Level).
PTAT
x ISH - (T
SET
-TSH) x IIB), R2 = T
SET
CC
x TC x R1 / (V
SET
V
ref
Page 2 January 1999 TOKO, Inc.
-
I
V
(V)
V
(V)
I
A)
I
A)
V
(V)
V
(V)
CONT
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 °C, VCC = 3 V, V
REFERENCE VOLTAGE vs.
TEMPERATURE
R
R
1
2
V
CONT
V
ref
COMP IN
I
IB
I
SH
TEST CIRCUIT
ON/OFF
CIRCUIT
VOLTAGE
REFERENCE
R1 + R2 = 40 kΩ
= 2.4 V, I
CONT
REFERENCE VOLTAGE vs.
OUT
TEMPERATURE
I
R
100 k
CC
3
V
PTAT
TEMPERATURE
SENSOR
+
V
CC
COMP
OUT
GND
I
SINK
= 40 µA, unless otherwise specified.
TK11051
10 µF
LINE REGULATION
1.62
1.61
1.60
ref
1.59
1.58
-40 0 40 80 120
TA (°C)
LOAD REGULATION
1.62
1.61
1.60
ref
1.59
1.6
1.4
1.2
PTAT
1.0
0.8
µ
CONT
-40 0 40 80 120
TA (°C)
CONTROL CURRENT vs.
TEMPERATURE
4
3
2
1
1.62
1.61
1.60
ref
1.59
1.58
µ
CONT
2 4 6 8 10
VCC (V)
CONTROL CURRENT vs.
CONTROL VOLTAGE
4
3
2
1
1.58
0 0.2 0.4 0.6 0.8
I
ref
(mA)
0
-40 0 40 80 120
TA (°C)
0
0 0.6 1.2 1.8 2.4
V
(V)
CONT
January 1999 TOKO, Inc. Page 3
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