TK11830M データシートの表示（PDF） - Toko America Inc

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TK11830M

POSITIVE-TO-NEGATIVE DC-DC CONVERTER

Toko America Inc  

TK11830

Note: Toko Inductor (470 µH): 646CY-471M

or 636CE-471K (D73C)

VOUT = (Vref / 5) x [ 1-4 x (R2 / R1)],

where Vref = 1.28 V

VCONT

(ON/OFF)

+VIN

GND

TEST CIRCUIT

Cref

R1

1 µF

20 k

Vref

RCONT CONTROL

300 kΩ VIN

+

CIN

47 µF

VFB

GND

VOSC

CFB

0.1 µF

SD

L

Note: If a noise filter is desired, select:

RF = (50 to 150 mV) / IOUT,

where IOUT = Load Current

R2

103 KΩ

VOUT RF

COUT

+ 47 µF

VO

CF

GND

TYPICAL PERFORMANCE CHARACTERISTICS

OUTPUT VOLTAGE VS.

LOAD CURRENT

-3.1

VOUT = -3 V

VIN = 8 V

-3.0

-2.9

-2.8

VIN = 3 V

-2.7

VIN = 5 V

-2.6

0

-5.1

-5.0

20 40 60 80 100

ILOAD (mA)

OUTPUT VOLTAGE VS.

LOAD CURRENT

VOUT = -5 V

-4.9

VIN = 3 V

VIN = 5 V

-4.8

-4.7

VIN = 8 V

-4.6

0

20 40 60 80 100

ILOAD (mA)

January 1999 TOKO, Inc.

OUTPUT VOLTAGE AND EFFICIENCY

VS. LOAD CURRENT

-5.1

VOUT

-5.0

VOUT = -5 V

100

VIN = 3 V

-4.9

50

-4.8

EFFICIENCY

-4.7

-4.6

0

6 12 18 24 30

ILOAD (mA)

OUTPUT VOLTAGE AND EFFICIENCY

VS. LOAD CURRENT

-5.1

VOUT = -5 V 100

VIN = 5 V

VOUT

-5.0

-4.9

50

-4.8

EFFICIENCY

-4.7

-4.6

0

10 20 30 40 50

ILOAD (mA)

Page 3

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