TL1466I Datasheet, PDF (1/24 Pages) Texas Instruments – HIGH-SPEED/PRECISION SIX CHANNEL SWITCHING REGULATOR CONTROLLER

D High-Speed Output Circuit to Drive PNP
Power Transistor
D Precision Reference Voltage . . . 1.5 V ±2%
at T_A = 25°C
D Oscillator Frequency . . . 50 kHz to 0.8 MHz
D Low Supply Voltage Operation V_CC = 2.5 V
to 12 V
TL1466I
HIGHĆSPEED/PRECISION SIX CHANNEL
SWITCHING REGULATOR CONTROLLER
SLVS262 − FEBRUARY 2000
D Output Voltage Limit (Channel 5 and 6)
D Low Supply Current
D Internal Undervoltage Lockout Protection
D Internal Short-Circuit Protection
D Shutdown Function
D External Sink Current Setting on Output
Stage
description
The TL1466I is a six channel pulse-width-modulation (PWM) control circuit. This device contains reference
voltage with a precision of ±2%, a triangle wave oscillator capable of high frequency oscillation up to 0.8 MHz,
various protection circuitry, and shutdown circuitry. The output regulation voltage for each channel is set by an
external resistor divider. Moreover, the output stage is capable of driving a PNP power transistor with high
speed. The high frequency/efficiency switching operation eliminates switching loss by using internal over-drive
circuitry at the rising edge and with reverse bias connecting external bootstrap capacitor at the falling edge. The
MOSFET can be used in parallel with the output diode at channel 1 and 4. This results in further high efficiency
operation replacing the constant time with this MOSFET when the output diode is turned on. Furthermore, it
operates 2.5 V supply voltage and balances switching current by switching repeatedly at the reverse phase with
two pairs (channel 1, 4, 6, and 2, 3, 5) of the six channels. The oscillator output of channel 1, 4, and 6 is reverse
phase for channel 2, 3, and 5. As a result of these features, this device is well-suited for power supply of portable
systems in battery-powered equipment.
FUNCTION TABLE FOR STANDBY
INPUT
OUTPUT
STANDBY STANDBY-3
VI ≤ 0.4 V
X†
VI ≥ 2 V
VI ≥ 2 V
VI ≤ 0.4 V
† _{X: High-level or low-level}
VREF
OFF
ON
ON
OUTPUT1, 2, 4, 5, 6
OFF
ON
ON
OUTPUT3
OFF
ON
OFF
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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