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TPS54335A Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce TPS54335A
Description  Synchronous Step-Down DC-DC Converter
Download  47 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54335A Fiches technique(HTML) 5 Page - Texas Instruments

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TPS54335A, TPS54335-1A, TPS54336A
www.ti.com
SLVSCD5D – NOVEMBER 2014 – REVISED FEBRUARY 2016
Product Folder Links: TPS54335A TPS54335-1A TPS54336A
Submit Documentation Feedback
Copyright © 2014–2016, Texas Instruments Incorporated
(1)
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
6.4 Thermal Information
THERMAL METRIC(1)
TPS5433xA
TPS5433xA and
TPS54335-1A
UNIT
DDA (SO PowerPAD)
DRC (VSON)
8 PINS
10 PINS
RθJA
Junction-to-ambient thermal resistance
42.1
43.9
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
50.9
55.4
°C/W
RθJB
Junction-to-board thermal resistance
31.8
18.9
°C/W
ψJT
Junction-to-top characterization parameter
8
0.7
°C/W
ψJB
Junction-to-board characterization parameter
13.5
19.1
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
7.1
5.3
°C/W
(1)
Measured at pins
6.5 Electrical Characteristics
The electrical ratings specified in this section apply to all specifications in this document unless otherwise noted. These
specifications are interpreted as conditions that will not degrade the parametric or functional specifications of the device for
the life of the product containing it. TJ = –40°C to 150°C, VIN = 4.5 to 28 V, (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE AND UVLO (VIN PIN)
Operating input voltage
4.5
28
V
Input UVLO threshold
Rising VIN
4
4.5
V
Input UVLO hysteresis
180
400
mV
VIN-shutdown supply current
VEN = 0 V
2
10
µA
VIN-operating non-switching supply
current
VVSENSE = 810 mV
310
800
µA
ENABLE (EN PIN)
Enable threshold
Rising
1.21
1.28
V
Enable threshold
Falling
1.1
1.17
V
Input current
VEN = 1.1 V
1.15
µA
Hysteresis current
VEN = 1.3 V
3.3
µA
VOLTAGE REFERENCE
Reference
TJ =25°C
0.7936
0.8 0.8064
V
0.788
0.8
0.812
MOSFET
High-side switch resistance(1)
V(BOOT-PH) = 3 V
160
280
m
Ω
V(BOOT-PH) = 6 V
128
230
m
Ω
Low-side switch resistance(1)
VIN = 12 V
84
170
m
Ω
ERROR AMPLIFIER
Error-amplifier transconductance (gm)
–2 µA < ICOMP < 2 µA, VCOMP = 1 V
1300
µmhos
Error-amplifier source and sink
VCOMP = 1 V, 100-mV overdrive
100
µA
Start switching peak current threshold
0.5
A
COMP to ISWITCH gm
8
A/V
CURRENT-LIMIT
High-side switch current-limit threshold
4
4.9
6.5
A
Low-side switch sourcing current-limit
3.5
4.7
6.1
A
Low-side switch sinking current-limit
0
A


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