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TPS54719 데이터시트(PDF) 5 Page - Texas Instruments

부품명 TPS54719
상세설명  TPS54719 2.95 V To 6 V Input, 7-A Synchronous Step Down SWIFT??Converter
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홈페이지  http://www.ti.com
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TPS54719 데이터시트(HTML) 5 Page - Texas Instruments

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TPS54719
www.ti.com
SLVSB69A – JUNE 2012 – REVISED JULY 2014
6.4 Thermal Information
TPS54719
THERMAL METRIC(1)
UNITS
RTE (16 PINS)
RθJA
Junction-to-ambient thermal resistance (standard board)
49.1
RθJA
Junction-to-ambient thermal resistance (custom board)(2)
37.0
ψJT
Junction-to-top characterization parameter
0.7
ψJB
Junction-to-board characterization parameter
21.8
°C/W
RθJC(top)
Junction-to-case(top) thermal resistance
50.7
RθJC(bot)
Junction-to-case(bottom) thermal resistance
7.5
RθJB
Junction-to-board thermal resistance
21.8
(1)
Power rating at a specific ambient temperature TA should be determined with a junction temperature of 140°C. This is the point where
distortion starts to substantially increase. See power dissipation estimate in the application section of this data sheet for more
information.
(2)
Test boards conditions:
(a) 2 inches x 2 inches, 4 layers, thickness: 0.062 inch
(b) 2 oz. copper traces located on the top of the PCB
(c) 2 oz. copper ground planes on the 2 internal layers and bottom layer
(d) 4 thermal vias (10mil) located under the device package
6.5
Electrical Characteristics
TJ = –40°C to 140°C, VIN = 2.95 to 6 V (unless otherwise noted)
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage
2.95
6
V
Internal under voltage lockout threshold
Rising VIN
2.4
2.8
V
Internal UVLO hysteresis
0.2
V
Shutdown supply current
EN = 0 V, 2.95 V
≤ VIN ≤ 6 V
1
5
μA
Quiescent Current - Iq
VSENSE = 620 mV, RT = 84 kΩ
455
550
μA
ENABLE AND UVLO (EN PIN)
Enable threshold
Rising
1.16
1.25
1.37
V
Falling
1.18
Enable threshold + 50 mV
-3.6
Input current
μA
Enable threshold – 50 mV
-0.7
VOLTAGE REFERENCE (VSENSE PIN)
2.95 V
≤ VIN ≤ 6 V, –40°C <TJ < 140°C
0.591
0.600
0.609
Voltage Reference
V
25°C
0.594
0.600
0.606
MOSFET
BOOT-PH = 5 V; TJ = 25°C
26
60
High side switch resistance
m
BOOT-PH = 2.95 V; TJ = 25°C
35
70
VIN = 5 V; TJ = 25°C
26
60
Low side switch resistance
m
VIN = 2.95 V; TJ = 25°C
35
70
ERROR AMPLIFIER
Input current
50
nA
Error amplifier transconductance (gm)
–2
μA < I(COMP) < 2 μA, V(COMP) = 1 V
250
μmhos
Error amplifier transconductance (gm) during
–2
μA < I(COMP) < 2 μA, V(COMP) = 0.9 V,
85
μmhos
slow start
Vsense = 0.3 V
Error amplifier source/sink
V(COMP) = 1 V, 100 mV overdrive
±20
μA
COMP to Iswitch gm
25
A/V
CURRENT LIMIT
Current limit threshold
8.5
10.5
A
Low-side reverse current limit
–1.5
–2.7
A
Copyright © 2012–2014, Texas Instruments Incorporated
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