TL5002CDRG4 Datasheet, PDF (1/18 Pages) Texas Instruments – PULSE-SIDTH-MODULATION CONTROL CIRCUIT

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TL5002
PULSEĆWIDTHĆMODULATION CONTROL CIRCUIT
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SLVS304A − SEPTEMBER 2000 − REVISED AUGUST 2002
D Complete PWM Power Control
D 3.6-V to 40-V Operation
D Internal Undervoltage-Lockout Circuit
D Oscillator Frequency . . . 20 kHz to 500 kHz
D Variable Dead Time Provides Control Over
Total Range
D Ideal Controller for DDR Memory
Application
D Uncommitted Error Amplifier Inputs
D PACKAGE
(TOP VIEW)
OUT 1
8
V_CC
2
7
COMP 3
6
INV 4
5
GND
RT
DTC
NI
description
The TL5002 incorporates on a single monolithic chip all the functions required for a pulse-width-modulation
(PWM) control circuit. Designed primarily for power-supply control, the TL5002 contains an error amplifier, a
regulator, an oscillator, a PWM comparator with a dead-time-control input, undervoltage lockout (UVLO), and
an open-collector output transistor.
The error-amplifier input common-mode voltage ranges from 0.9 V to 1.5 V. Dead-time control (DTC) can be
set to provide 0% to 100% dead time by connecting an external resistor between DTC and GND. The oscillator
frequency is set by terminating RT with an external resistor to GND. During low V_CC conditions, the UVLO circuit
turns the output off until V_CC recovers to its normal operating range.
The TL5002 is characterized for operation from − 40°C to 85°C.
AVAILABLE OPTIONS
TA
SMALL OUTLINE
(D)
−20°C to 85°C
TL5002CD
−40°C to 85°C
TL5002ID
The D package is available taped and reeled. Add the suffix R
to the device type (e.g., TL5002CDR).
functional block diagram
VCC
2
UVLO
5
NI
INV ⁴
COMP ³
Error
Amplifier
+
−
Reference 2.5 V
Voltage
RT
7
IDT
OSC
DTC
6
PWM/DTC
Comparator
OUT
1
8
GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
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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Copyright  2002, Texas Instruments Incorporated
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