TS3002
PIN FUNCTIONS
PIN
1
NAME
FOUT
FUNCTION
Fixed Frequency Output. A push-pull output stage with an output
resistance of 160Ω, the FOUT pin swings from GND to V
DD
. For
lowest power operation, capacitive loads should be minimized
and resistive loads should be maximized.
BOOST Input. A digital switch input, BOOST controls the
propagation delay of the primary timing comparator in the
TS3002’s master oscillator subcircuit. Connecting the BOOST pin
to GND sets the maximum programmable oscillator frequency to
~90kHz.Connecting the BOOST pin to VDD reduces the
comparator’s propagation delay and increases the maximum
programmable master oscillator’s frequency to 290kHz.
Pulse-width Modulated Output. A push-pull output stage with an
output resistance of 160Ω, the PWMOUT pin is wired anti-phase
with respect to FOUT and swings from GND to V
DD
. For lowest
power operation, capacitive loads should be minimized and
resistive loads should be maximized.
PWMOUT Enable and Duty Cycle Control Input. An analog input
pin, the V
CNTRL
pin voltage enables the TS3002’s PWM engine
and controls the duty cycle at PWMOUT from 12%
(V
CNTRL
= 0.03 x V
DD
) to 90% (V
CNTRL
= 0.27 x V
DD
). Enabling the
PWM engine increases the TS3002’s nominal operating supply
current. To disable the TS3002’s PWM engine, CNTRL shall be
connected to V
DD
.
FOUT Programming Capacitor Input. A 7.9pF capacitor
connected from this pin to GND in junction with a 4.32MΩ resistor
at the RSET pin sets the TS3002’s internal oscillator’s output
period to ~40µs (25kHz). The maximum capacitance value is
22pF.
Ground – Connect this pin to the system’s analog ground plane.
FOUT Programming Resistor Input. A 4.32MΩ resistor connected
from this pin to GND sets the TS3002’s internal oscillator’s output
period to 40μs (25kHz). For optimal performance, the
composition of the RSET resistor shall be consistent with
tolerances of 1% or lower. The RSET pin voltage is 0.3V at a 1V
supply.
Power Supply Voltage Input. While the TS3002 is fully specified
at 1V, the supply voltage range is 0.9V ≤ V
DD
≤ 1.8V. It is always
considered good engineering practice to bypass the V
DD
pin with
a 0.1μF ceramic decoupling capacitor in close proximity to the
TS3002.
Exposed paddle is electrically connected to GND.
2
BOOST
3
PWMOUT
4
CNTRL
5
CSET
6
GND
7
RSET
8
VDD
EP
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TS3002DS r1p0
Page 7
RTFDS
TOUCHSTONE [ TOUCHSTONE SEMICONDUCTOR INC ]
