TS3003

Page 6

TS3003 Rev. 1.0

PIN FUNCTIONS

PIN

NAME

FUNCTION

1

FOUT

Fixed Frequency Output. A push-pull output stage with an

output resistance of 160

Ω. FOUT pin swings from GND to

VDD. For lowest power operation, capacitance loads should

be minimized and resistive loads should be maximized.

2,3,

NC

Non-Connect.

5

PWMOUT

Pulse-width Modulated Output. A push-pull output stage with

an output resistance of 160

Ω, the PWMOUT pin is wired anti-

phase with respect to FOUT and swings from GND to VDD.

For lowest power operation, capacitance loads should be

minimized and resistive loads should be maximized.

6

PWM_CNTRL

PWM Output Pulse Control Pin. Applying a voltage between

output that is set by the capacitor connected to the CPWM

pin. Connect PWM_CNTRL to VDD for fixed PWMOUT output

pulse time (determined only by capacitor at CPWM).

4,7

GND

Ground. Connect this pin to the system’s analog ground

plane.

8

CPWM

PWMOUT Pulse Width Programming Capacitance Input. A

target capacitance connected from this pin to GND sets the

duty cycle of the PMW output. Minimize any stray capacitance

on this pin. The voltage on this pin will swing from GND to

(saves PWM current).

9

VDD

Power Supply Voltage Input. The supply voltage range is

1.55V

coupling capacitor in close proximity to the TS3003.

10

RSET

FOUT Programming Resistor Input. A 4.32MOhm resistor

connected from this pin to ground sets the T3003’s internal

oscillator’s output period to 40µs (25KHz). For optimal

performance, the composition of the RSET resistor shall be

consistent with a tolerance of 1% or lower. The RSET pin

voltage is approximately 0.3V.