TK75018 Datasheet, PDF (1/8 Pages) TOKO, Inc – SWITCHED CAPACITOR VOLTAGE CONVERTER WITH REGULATOR

TK75018
FEATURES
s 35 mA (typ.) Output Current
s Operating Range 3.5 to 7 V
s Reference and Error Amplifier for Regulation
s External Shutdown
s External Oscillator Synch
SWITCHED CAPACITOR VOLTAGE
CONVERTER WITH REGULATOR
APPLICATIONS
s Voltage Inverter
s Negative Voltage Doubler
s Voltage Regulator
s Positive Voltage Doubler
TK75018
FB/SD
V+
CAP ⁺
OSC
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 self-
oscillate 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.
GND
CAP ^-
FB/SD
CAP ⁺
GND
CAP ^-
FB/SD
NC
CAP+
GND
NC
CAP-
NC
Vref
VOUT
V+
OSC
Vref
VOUT
V+
NC
OSC
Vref
NC
NC
VOUT
ORDERING INFORMATION
TK75018 C
Package Code
Tape/Reel Code
Temp. Range
PACKAGE CODE
D: DIP-8
M: SOP-8
V: TSSOP-14
TEMPERATURE RANGE
C: -20 TO 80 °C
TAPE/REEL CODE
TL: Tape Left
V+
Vref
FB/SD
BLOCK DIAGRAM
BANDGAP
REFERENCE
1.25 V +
-
DRIVE
DRIVE
OSC
GND
OSC
Q
CONTROL
Q
DRIVE
DRIVE
CAP ⁺
VOUT
CAP ^-
May 1999 TOKO, Inc.
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