TOKO TK75018VCTL, TK75018MCTL, TK75018DCTL Datasheet

GND

FB/SD

V

ref

V

+

CAP

+

OSC

V

OUT

CAP

-

GND

FB/SD

V

ref

V

+

CAP

+

OSC

V

OUT

CAP

-

FEATURES

V

ref

CAP

+

+

-

BANDGAP

REFERENCE

CONTROL

Q

Q

OSC

1.25 V

CAP

-

V

OUT

DRIVE

DRIVE

DRIVE

DRIVE

V +

FB/SD

OSC

GND

TK75018

SWITCHED CAPACITOR VOLTAGE

CONVERTER WITH REGULATOR

APPLICATIONS

■ 35 mA (typ.) Output Current

■ Operating Range 3.5 to 7 V

■ Reference and Error Amplifier for Regulation

■ External Shutdown

■ External Oscillator Synch

DESCRIPTION

The TK75018 is a monolithic switched capacitor converter
with feedback control. With just two capacitors, the TK75018
can create a negative voltage supply which tracks a
positive supply. As an alternative, the feedback pin can be
used to establish regulation at a desired voltage, and it can
also be used as a shutdown signal input. A single TK75018
can also be configured as a non-inverting step-up converter
or dual output voltage doubler.

With no external timing elements, the converter will self­oscillate at 25 kHz, nominal. This frequency can also be
user adjusted with a small capacitor or synchronized to
another oscillator.

Quiescent current is typically 2.5 mA. Standby current is
guaranteed less than 200 µA over the full operating
temperature and input voltage ranges.

■ Voltage Inverter

■ Negative Voltage Doubler

■ Voltage Regulator

■ Positive Voltage Doubler

TK75018

FB/SD

NC

CAP

GND

NC

CAP

NC

+

V

+

-

NC
OSC

V

ref

NC
NC

V

OUT

BLOCK DIAGRAM

ORDERING INFORMATION

TK75018 C

Package Code

PACKAGE CODE

D: DIP-8
M: SOP-8
V: TSSOP-14

May 1999 TOKO, Inc. Page 1

TEMPERATURE RANGE

C: -20 TO 80 °C

Tape/Reel Code
Temp. Range

TAPE/REEL CODE

TL: Tape Left

TK75018

ABSOLUTE MAXIMUM RATINGS

Supply Voltage VIN For Doubler Conf. ....................... 7 V

Supply Voltage VIN For Regulating Conf................... 8 V

Power Dissipation TK75018M (Note 1).............. 600 mW

Power Dissipation TK75018D (Note 2) ............ 1000 mW

Storage Temperature Range ................... -55 to +150 °C

Operating Temperature Range .....................-20 to 80 °C

Junction Temperature .......................................... 150 °C

Lead Soldering Temperature (10 s) ..................... 235 °C

Power Dissipation TK75018V (Note 3) .............. 950 mW

TK75018 ELECTRICAL CHARACTERISTICS

Test conditions: V

SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

I

CC(Reg)

I

CC(Inv)

V

CC

V

LOSS

R

OUT

f

OSC

V

ref

Mode

Reference Voltage

= 5.0 V, TA = Tj = Operating Temperature Range, Note 6 Configuration, unless otherwise specified.

IN

Supply Current Regulating I
Supply Current Inverting

= 0 mA, (Note 6) 2.5 3.5 mA

LOAD

= 0 mA 3.5 4.5 mA

I

LOAD

Supply Voltage Range Under Note 6 Conditions 3.5 7 V

= 1 mA, (Note 4) 0.35 0.55

I

OUT

Voltage Loss (VIN - V

Output Resistance

OUT

)

= 20 mA, (Note 4) 1 1.5

I

OUT

= 1 mA to 20 mA, (Notes 4,5)

∆I

OUT

32 54

Oscillator Frequency 3.5 V ≤ VIN ≤ 7 V, (Note 6) 15 25 35 kHz

= 25 °C 2.35 2.50 2.65 V

T

= T

j

A

= Operating Temp. Range 2.25 2.75 V

T

= T

j

A

V
V

Ω

V

OUT

Line Reg Line Regulation

LoadReg
LoadReg
I

STBY

R

OUT(Ref)

Note 1: Power dissipation is 600 mW when mounted as recommended. Derate at 4.8 mW/°C for operation above 25 °C.
Note 2: Power dissipation is 1000 mW when mounted as recommended. Derate at 8 mW/°C for operation above 25 °C
Note 3: Power dissipation is 950 mW when mounted as recommended. Derate at 7.6 mW/ °C for operation above 25 °C.
Note 4: Device is connected as an inverter, with pins 1, 6, and 7 unconnected; CIN = 2.2 µF tantalum, C
Note 5: Output resistance means the slope of the ∆V

Note 6: Device is connected as a positive to negative converter/regulator with R1 = 44.2 k, R2 = 154 k, C1 = 4.7 nF, C
CIN = 2.2 µF tantalum, C

Regulated Voltage Tj = 25 °C, I

Load Regulation @ 20 mA 1 mA ≤ I

1

Load Regulation @ 35 mA 1 mA ≤ I

2

Standby Current V

Reference Output
Resistance

of the curve.

= 33 µF tantalum.

OUT

3.5 V ≤ V

(Note 6)

= 0 V, (Note 6) 60 200 µA

PIN1

≤ 80 µA 350

V

ref

vs. ∆I

OUT

= 1 mA, (Note 6) -2.8 -3.0 -3.2 V

L

≤ 7 V, I

IN

≤ 20 mA, (Note 6) 20 150 mV

OUT

≤ 35 mA, (Note 6) 60 300 mV

OUT

curve, for output currents of 1 to 20 mA. This represents a linear approximation

OUT

= 1 mA,

L

15 80 mV

= 33 µF tantalum.

OUT

VIN

Ω

= 4.7 µF tantalum,

Page 2 May 1999 TOKO, Inc.

C

V

OUT

(V)

-2.8

OUTPUT VOLTAGE

REGULATING @ 35 mA LOAD

VS.

TEMPERATURE

TEMPERATURE (°C)

-50 0 50 100

-3.0

-3.1

-3.2

-3.15

-3.05

-2.85

-2.95

-2.90

Note 6 Test Circuit

IN

2.2 µF

TK75018

TEST CIRCUITS

V

= 3.5 TO 7 V

IN

R

1

R

2

0.002 µF

+

4.7 µF

+

OUT

VIN = 3.5 to 6 V

+

4.7 µF

V

OUT

FB/SD

V +

C

+

2.2 µF

CAP +

IN

GND

V

ref

CAP -

V

OUT

V

OUT

C

OUT

33 µF

V +

+

CAP +

GND

CAP -

V

OUT

C
33 µF

+

NOTE 4 TEST CIRCUIT (Non Regulating)

REGULATING @ 0 mA LOAD

-2.8

-2.85

-2.9

-2.95

-3.0

-3.05

REGULATING MODE

-3.1

OUT

V

-3.15

-3.2

-50 0 50 100

-2.8

-2.85

(V)

-2.90

-2.95

-3.0

-3.05

-3.1

-3.15

OUT REGULATING MODE

V

-3.2
0 10 20 30 40

May 1999 TOKO, Inc. Page 3

TYPICAL PERFORMANCE CHARACTERISTICS

OUTPUT VOLTAGE

VS.

TEMPERATURE

V

IN

Note 6 Test Circuit

TEMPERATURE (°C)

OUTPUT VOLTAGE

OUTPUT CURRENT

V

= 5 V

IN

CIN = 2.2 µF
C

OUT

Note 6 Test Circuit

I

(mA)

OUT

= 5 V

VS.

= 33 µF

OUTPUT VOLTAGE

REGULATING @ 20 mA LOAD

VS.

TEMPERATURE

-2.8

-2.85

-2.9

-2.95

(V)

-3.0

OUT

V

-3.05

-3.1

-3.15

Note 6 Test Circuit

-3.2

-50 0 50 100
TEMPERATURE (°C)

OUTPUT VOLTAGE

TEMPERATURE

-3.4

-3.6

-3.8

-4.0

-4.2

-4.4

(V) NON REGULATING

-4.6

OUT

-4.8

V

Note 4 Test Circuit

-5.0

-50 0 50 100
TEMPERATURE (°C)

NOTE 6 TEST CIRCUIT (Regulating)

VOLTAGE LOSS
OUTPUT CURRENT

C

= 2.2 µF

IN

C

= 33 µF

OUT

VIN = 5 V

IL = 20 mA

IL = 5 mA

VS.

2

1.8

1.6

1.4

1.2
1

0.8

0.6

(V) NON REGULATING

0.4

LOSS

0.2

V

0

0 4 8 12 16 20 24 28 32 36

VS.

Tj = 25 °C

Note 4 Test Circuit

I

(mA)

OUT