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TPS5403 데이터시트(PDF) 5 Page - Texas Instruments

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부품명 TPS5403
상세설명  4.5-V TO 28-V INPUT VOLTAGE, 3.3-V FIXED OUTPUT, 1.7-A OUTPUT CURRENT, NON-SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED MOSFET
PDF  18 Pages
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

TPS5403 데이터시트(HTML) 5 Page - Texas Instruments

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TPS5403
www.ti.com
SLVSBK5 – SEPTEMBER 2012
ELECTRICAL CHARACTERISTICS
TA = -40°C to 125°C, VIN = 4.5 V to 28 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT SUPPLY
VIN
Input Voltage range
4.5
28
V
Non switching quiescent power supply
IDDQ_nsw
VSENSE > 3.5 V
100
µA
current
Rising VIN
3.5
V
UVLO
VIN under voltage lockout
Hysteresis
200
mV
FEEDBACK AND ERROR AMPLIFIER
VSENSE
Regulated output voltage
VIN = 12 V
3.2
3.3
3.4
V
-2 µA < ICOMP < 2 µA,
Gm_EA
Error amplifier trans-conductance
92
µs
VCOMP = 1 V
Igm
Error amplifier source/sink current
VCOMP = 1 V, 100 mV overdrive
±7
µA
Gm_SRC
COMP voltage to inductor current Gm
VIN = 12 V
9
A/V
PFM MODE AND SOFT-START
Pulse skipping mode switch current
Ith
300
mA
threshold
ISS
Charge current
2
µA
OSCILLATOR
fSW_BK
Switching frequency range
Set by external resistor ROSC
50
1100
kHz
ROSC = GND
70
fSW
Programmable frequency
ROSC = OPEN
120
kHz
ROSC = 85.5 k
Ω
300
Frequency spread spectrum in
fjitter
VIN = 12 V
±6
%
percentage of fSW
Jittering swing frequency in percentage
fswing
VIN = 12 V
1/512
of fSW
tmin_on
Minimum on time
VIN = 12 V, TA = 25°C
200
ns
Dmax
Maximum duty ratio
VIN = 12 V
93
%
CURRENT LIMIT
ILIMIT
Peak inductor current limit
VIN = 12 V
2.2
2.5
3.1
A
MOSFET ON-RESISTANCE
Rdson_HS
On resistance of high side FET
VIN = 12 V
120
240
m
Ω
THERMAL SHUTDOWN
TTRIP
Thermal protection trip point
Rising temperature
165
°C
Copyright © 2012, Texas Instruments Incorporated
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