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TPS54233QDRQ1 Datasheet(PDF) 3 Page - Texas Instruments

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No. de pieza TPS54233QDRQ1
Descripción Electrónicos  2-A, 28-V INPUT, STEP-DOWN DC/DC CONVERTER WITH ECO-MODE?
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS54233QDRQ1 Datasheet(HTML) 3 Page - Texas Instruments

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TPS54233-Q1
www.ti.com
SLUSAZ7A – MARCH 2012 – REVISED MARCH 2012
THERMAL INFORMATION
TPS54233-Q1
THERMAL METRIC(1)
UNITS
D (8 PINS)
θJA
Junction-to-ambient thermal resistance
116.7
θJCtop
Junction-to-case (top) thermal resistance
62.4
θJB
Junction-to-board thermal resistance
57.0
°C/W
ψJT
Junction-to-top characterization parameter
14.5
ψJB
Junction-to-board characterization parameter
56.5
θJCbot
Junction-to-case (bottom) thermal resistance
n/a
(1)
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN
TYP
MAX
UNIT
Operating Input Voltage on (VIN pin)
3.5
28
V
Operating junction temperature, TJ
–40
+150
°C
ELECTRICAL CHARACTERISTICS
TA = –40°C to +125°C, VIN = 3.5V to 28V (unless otherwise noted)
DESCRIPTION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE (VIN PIN)
Internal undervoltage lockout threshold
Rising and Falling
3.5
V
Shutdown supply current
EN = 0V, VIN = 12V, –40°C to +85°C
1
4
μA
Operating – non switching supply current
VSENSE = 0.85 V
75
110
μA
ENABLE AND UVLO (EN PIN)
Enable threshold
Rising and Falling
1.25
1.35
V
Input current
Enable threshold – 50 mV
-1
μA
Input current
Enable threshold + 50 mV
-4
μA
VOLTAGE REFERENCE
Voltage reference
0.772
0.8
0.828
V
HIGH-SIDE MOSFET
On resistance
BOOT-PH = 3 V, VIN = 3.5 V
115
200
m
BOOT-PH = 6 V, VIN = 12 V
80
150
ERROR AMPLIFIER
Error amplifier transconductance (gm)
–2
μA < I(COMP) < 2 μA, V(COMP) = 1 V
92
μmhos
Error amplifier DC gain(1)
VSENSE = 0.8 V
800
V/V
Error amplifier unity gain bandwidth(1)
5 pF capacitance from COMP to GND pins
2.7
MHz
Error amplifier source/sink current
V(COMP) = 1 V, 100 mV overdrive
±7
μA
Switch current to COMP transconductance
VIN = 12 V
9
A/V
SWITCHING FREQUENCY
TPS54233-Q1 Switching Frequency
VIN = 12V
210
300
390
kHz
Minimum controllable on time
VIN = 12V, +25°C
105
130
ns
Maximum controllable duty ratio(1)
BOOT-PH = 6 V
90%
93%
PULSE SKIPPING ECO-MODE™
Pulse skipping Eco-mode™ switch current threshold
100
mA
CURRENT LIMIT
Current limit threshold
VIN = 12 V
2.3
3.5
A
(1)
Specified by design
Copyright © 2012, Texas Instruments Incorporated
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