TK11850 データシートの表示（PDF） - Toko America Inc
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TK11850 Datasheet PDF : 14 Pages
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TK11850L
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 °C, unless otherwise specified.
OSC PERIOD vs. CX
CAPACITANCE
12
11
10
VIN = 3 V
9
VIS = VEN = VIN
8
OSC FREQUENCY vs.
TEMPERATURE
300
280
VIN = 3 V
VIN = 5 V
VIN = 10 V
260
7
6
240
5
4
220
3
VIS = VEN =VIN
2
200 CX = 100 pF
1
0
180
0
100
200
300
-30 -10 10 30 50 70 90
CX CAPACITANCE (pF)
TEMPERATURE (°C)
MAXIMUM DUTY CYCLE vs.
OSC FREQUENCY
80
VIN = 3 V
VIS = VEN = VIN
VFB = 0 V
75
70
65
10
100
1000
OSC FREQUENCY (kHz)
SWITCHING CURRENT vs.
SWITCH SATURATION VOLTAGE
500
400
300
-20 °C
25 °C
85 °C
200
100
VIN = 3 V
VIS = VEN = VIN
VFB = 0 V
VCX = 0 V
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
SWITCH SATURATION
VOLTAGE (V)
REFERENCE VOLTAGE vs.
SUPPLY VOLTAGE
530
528
526
524
VIS = VEN = VIN
522
520
518
516
0
24
6
8 10
SUPPLY VOLTAGE (V)
INDUCTOR CURRENT-LIMIT SENSE
VOLTAGE vs. SUPPLY VOLTAGE
100
90
-20 °C
80
25 °C
85 °C
70
60
Vlimit = VIS - VIN
50
VEN = VIN
40
30
20
10
0
2
4
6
8 10 12
SUPPLY VOLTAGE (V)
IS INPUT BIAS CURRENT
vs. IS VOLTAGE
100
-20 °C
90
25 °C
80
85 °C
70
60
50
40
30
20
VIN = VEN = VIS
10
VFB = 1 V
0
0 2 4 6 8 10 12 14 16 18 20
IS VOLTAGE (V)
REFERENCE VOLTAGE vs.
TEMPERATURE
530
528
526
VIN = 3 V
VIS = VEN = VIN
524
522
520
518
516
-30 -10 10 30 50 70 90
TEMPERATURE (°C)
SUPPLY CURRENT vs.
EN VOLTAGE
10
-20 °C
9
25 °C
8
85 °C
7
6
5
VIN = 3 V
4
VIS = VIN
3
VFB = 0 V
CX = 100 pF
2
1
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
EN VOLTAGE (V)
May 2001 TOKO, Inc.
Page 5
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